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cui .com 02/20/2013 1 of 30 series : neb-n description : fully regulated advanced bus converters features ? industry standard eighth-brick 58.4 x 22.7 x 10.2 mm (2.299 x 0.894 x 0.402 in) ? industry-leading power density for telecom and datacom 129~147w / sq. in ? high efficiency, typ. 95.2% at half load, 12 vout ? fully regulated advanced bus converter from 36~75vin ? 2,250 vdc input to output isolation ? fast feed forward regulation to manage line transients ? optional baseplate for high temperature applications ? droop load sharing with 10% current share accuracy ? 2.9 million hours mtbf ? iso 9001/14001 certified supplier model input voltage output voltage output current output wattage (vdc) (vdc) max (a) max (w) neb-264nwa-an 36~75 12 22 264 neb-300nma-an 40~60 12 25 300 neb-261nwb-an 36~75 12.45 22 261 general characteristics ? industry standard footprint ? isolated topology ? high power density ? fast transient response ? high conversion efficiency ? wide range of input and output characteristics available date page
cui .com date 02/20/2013 page 2 of 30 cui inc series : neb-n description : fully regulated advanced bus converters nominal output voltage: a = 12.0 v b = 12.45 v c = 9.6 v d = 9.0 v e = 5.0 v part number key neb- xxx n x x - x x x x - xxx - es x input voltage range: w = wide (36~75 v) m = medium (40~60 v) firmware confguration: 000~zzz base number design output power: 1~999 example part number: neb-264nwa-an-001 264 w output power, no digital pins wide input voltage range, 12.0 v output 5.33 mm pins, negative enable logic frmware revision 001 no digital interface load sharing function: d = vout droop pin description: a = 5.33 mm (0.210 in.) b = 4.57 mm (0.180 in.) c = 3.69 mm (0.145 in.) d = 2.79 mm (0.110 in.) s = smt enable logic sense: n = negative logic p = positive logic heatsink option: "blank" = open frame h = heatsink fat l = heatsink lateral fns t = heatsink transverse fns g = heatsink with gnd pin engineering sample: es engineering phase: a~z packaging: 20 converters(through hole pin)/tray, pe foam dissipative 20 converters(surface mount pin)/tray, antistatic ppe contents part number key........................................................2 general information...................................................3 safety specifcation....................................................3 absolute maximum ratings..........................................4 emc specifcation.........................................19 operating information...................................19 thermal consideration..................................21 connections............................................22 mechanical information.................................23 soldering information...................................26 delivery package information.........................27 product qualifcation specifcation...................29 electrical specifcation: 12 v, 22 a, 264 w, 36~75 vin; neb-264nwa-an.....................5 12 v, 25 a, 300 w, 40~60 vin; neb-300nma-an.....................9 12.45 v, 22 a, 261 w, 36~75 vin; neb-261nwb-an...............13 12.45 v, 25 a, 296 w, 40~60 vin; neb-296nmb-an...............16
cui .com date 02/20/2013 page 3 of 30 cui inc series : neb-n description : fully regulated advanced bus converters general information safety specifcation reliability compatability with rohs requirements general information isolated dc/dc converters non - isolated dc/dc regulators the failure rate () and mean time between failures (mtbf= 1/ ) is calculated at max output power and an operating ambient temperature (t a ) of +40c. cui power modules uses telcordia sr-332 issue 2 method 1 to calculate the mean steady-state failure rate and standard deviation (). telcordia sr-332 issue 2 also provides techniques to estimate the upper confdence levels of failure rates based on the mean and standard deviation. mtbf (mean value) for the neb series = 2.91 mh. mtbf at 90% confdence level = 2.37 mh the products are compatible with the relevant clauses and requirements of the rohs directive 2011/65/eu and have a maximum concentration value of 0.1% by weight in homogeneous materials for lead, mercury, hexavalent chromium, pbb and pbde and of 0.01% by weight in homogeneous materials for cadmium. exemptions in the rohs directive utilized in cui power modules products are found in the statement of compliance document. cui power modules dc/dc converters and dc/dc regulators are designed in accordance with the safety standards iec60950-1, en60950-1 and ul60950-1 safety of information technology equipment iec/en/ul60950-1 contains requirements to prevent injury or damage due to the following hazards: ? electrical shock ? energy hazards ? fire ? mechanical and heat hazards ? radiation hazards ? chemical hazards on-board dc/dc converters and dc/dc regulators are defned as component power supplies. as components they cannot fully comply with the provisions of any safety requirements without conditions of acceptability. clearance between conductors and between conductive parts of the component power supply and conductors on the board in the fnal product must meet the applicable safety requirements. certain conditions of acceptability apply for component power supplies with limited stand-off (see mechanical information for further information). it is the responsibility of the installer to ensure that the fnal product housing these components complies with the requirements of all applicable safety standards and regulations for the fnal product. component power supplies for general use should comply with the requirements in iec/en/ul 60950 1 safety of information technology equipment. product related standards, e.g. ieee 802.3af power over ethernet, and ets 300132 2 power interface at the input to telecom equipment, operated by direct current (dc) are based on iec/en/ul 60950 1 with regards to safety. cui power modules dc/dc converters and dc/dc regulators are ul 60950-1 recognized and certifed in accordance with en 60950-1. the fammability rating for all construction parts of the products meet requirements for v-0 class material according to iec 60695-11-10, fire hazard testing, test fames C 50 w horizontal and vertical fame test methods. galvanic isolation between input and output is verifed in an electric strength test and the isolation voltage (v iso ) meets the voltage strength requirement for basic insulation according to iec/en/ul 60950-1. it is recommended to use a slow blow fuse at the input of each dc/dc converter. if an input flter is used in the circuit the fuse should be placed in front of the input flter. in the rare event of a component problem that imposes a short circuit on the input source, this fuse will provide the following functions: ? isolate the fault from the input power source so as not to affect the operation of other parts of the system ? protect the distribution wiring from excessive current and power loss thus preventing hazardous overheating the dc/dc converter output is considered as safety extra low voltage (selv) if one of the following conditions is met: ?the input source has double or reinforced insulation from the ac mains according to iec/en/ul 60950-1 ?the input source has basic or supplementary insulation from the ac mains and the input of the dc/dc converter is maximum 60 vdc and connected to protective earth according to iec/en/ul 60950-1 ?the input source has basic or supplementary insulation from the ac mains and the dc/dc converter output is connected to protective earth according to iec/en/ul 60950-1 me an steady-st ate fa ilure ra te , std. devi ation, h / s e r u l i a f n 9 . 0 6 h / s e r u l i a f n 1 2 4 the dc/dc regulator output is selv if the input source meets the requirements for selv circuits according to iec/ en/ul 60950-1.
cui .com date 02/20/2013 page 4 of 30 cui inc series : neb-n description : fully regulated advanced bus converters -i n +i n +o ut -o ut dr iv er dr iv er co nt ro l rc is ol at io n au xi llar y su pply rc parameter conditions/description min typ max units operating temperature (t p1 ) see thermal consideration section -40 +125 c storage temperature (t s ) -55 +125 c input voltage (v i ) -0.5 +80 +65* v isolation voltage (v iso ) input to output test voltage, see note 1 2250 vdc input voltage transient (v tr ) according to etsi en 300 132-2 and telcordia gr- 1089-core +100 +80* v remote control pin voltage (v rc ) see operating information section -0.3 18 v stress in excess of absolute maximum ratings may cause permanent damage. absolute maximum ratings, sometimes referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits in the electrical specifcation. if exposed to stress above these limits, function and performance may degrade in an unspecifed manner. note 1: isolation voltage (input/output to base-plate) max 750 vdc. * applies for the narrow input version v i = 40-60 v fundamental circuit diagram absolute maximum ratings functional description t p1 , t p3 = -40 to +90oc, v i = 36 to 75 v. typical values given at: t p1 , t p3 = +25c, v i = 53 v, max i o , unless otherwise specifed under conditions confguration file: 190 10-cda 102 0315/001 parameter conditions/description min typ max units fault protection characteristics input under voltage lockout (uvlo) fault limit setpoint accuracy hysteresis delay 0 32 0.5 2 300 1 v v v s output voltage - under voltage protection fault limit fault response time 0 200 v s output voltage - over voltage protection fault limit fault response time 15.6 200 v s over current protection (ocp) setpoint accuracy (i o ) fault limit fault response time -6 25 200 6 % a s over temperature protection (otp) fault limit hysteresis fault response time 125 10 300 o c o c s
cui .com date 02/20/2013 page 5 of 30 cui inc series : neb-n description : fully regulated advanced bus converters electrical specifcation 12 v, 22 a, 264 w t p1 = -40 to +90oc, v i = 36 to 75v. typical values given at: t p1 = +25c, v i = 53 v, max i o , unless otherwise specifed under conditions. additional c in = 0.1 mf, c out = 0.1 mf. see operating information section for selection of capacitor types. confguration file: 19010-cda 102 0315/001 parameter conditions/description min typ max units input voltage range (v i ) 36 75 v turn-off input voltage (v ioff ) decreasing input voltage 32 33 34 v turn-on input voltage (v ion ) increasing input voltage 34 35 36 v internal input capacitance (c i ) 11 f output power (p o ) 0 264 w effciency () 50% of max i o max i o 50% of max i o , v i = 48 v max i o , v i = 48 v 94.7 94.5 95.2 94.8 % % % % power dissipation (p d ) max i o 15.5 22 w input idling power (p li ) i o = 0 a, v i = 53 v 3.5 w input standby power (p rc ) v i = 53 v (turned off with rc) 0.4 w switching frequency (f s ) 0-100% of max i o 180 khz output voltage setting and ac - curacy (v oi ) t p1 = +25c, v i = 53 v, i o = 12 a 11.88 12.0 12.12 v output voltage tolerance band (v o ) 0-100% of max i o 11.76 12.24 v idling voltage (v o ) i o = 0 a 11.88 12.12 v line regulation (v o ) max i o 100 200 mv load regulation (v o ) v i = 53 v, 1-100% of max i o 30 100 mv load transient voltage deviation (v tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.2 mf oscon type 350 mv load transient recovery time (t tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.2 mf oscon type 200 s ramp-up time (t r ) - (from 10?90% of v oi ) 10-100% of max i o 8 ms start-up time (t s ) - (from v i connection to 90% of v oi ) 10-100% of max i o 23 ms v i shut-down fall time (t f ) - (from v i off to 10% of v o ) max i o i o = 0 a 0.7 6 ms s rc start-up time (t rc ) max i o 12 ms rc shut-down fall time (t rc ) - (from rc off to 10% of v o ) max i o i o = 0 a 3 6 ms s output current (i o ) 0 22 a current limit threshold (i lim ) v o = 10.8 v, t p1 < max t p1 24 25 26 a short circuit current (i sc ) t p1 = 25oc, see note 1 1.1 a recommended capacitive load (c out ) t p1 = 25oc, see note 2 0 2.2 6 mf output ripple & noise (v oac ) see ripple & noise section, v oi 50 100 mvp-p over voltage protection (ovp) t p1 = +25c, v i = 53 v, 10-100 % of max i o 15.6 v remote control (rc) sink current (note 3), see operating information trigger level, decreasing rc-voltage trigger level, increasing rc-voltage 2.6 2.9 0.7 ma v v note 1: ocp in hic-up mode 2: low esr-value 3: sink current drawn by external device connected to the rc pin. minimum sink current required to guarantee activated rc function.
cui .com date 02/20/2013 page 6 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12 v, 22 a, 264 w efficien cy po we rd is sipation 75 80 85 90 95 100 05 10 15 20 25 [a ] [% ] 36 v 48 v 53 v 75 v 0 4 8 12 16 20 05 10 15 20 25 [a ] [w ] 36 v 48 v 53 v 75 v efficienc y vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +2 5 c. dissipat ed po wer vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +25 c. output characteristic sc urrent limit characteristic s 11.8 0 11.9 0 12.0 0 12.1 0 12.2 0 05 10 15 20 25 [a ] [v ] 36 v 48 v 53 v 75 v 0.00 3.00 6.00 9.00 12.0 0 15.0 0 15 18 21 24 27 [a ] [v ] 36 v 48 v 53 v 75 v o utpu t vo lt ag e vs . lo ad cu rr en t at t p1 = +25c. o utpu t vo lt ag e vs . lo ad cu rr en t at i o > ma x i o , t p1 = +25c.
cui .com date 02/20/2013 page 7 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12 v, 22 a, 264 w start-up shut-dow n star t-up en ab le d by conne ct ing v i t at : p1 =+ 25c, v i i =5 3v , o top tr ace: out put vo lt ag e( 5 v/di v) . = 22 a resi st iv e lo ad. bottom trace: i nput vo lt age (5 0v /d iv ). ti me sca le : (5 ms /d iv ) shut -dow n enab le d by di sconnect ing v i t at : p1 =+ 25c, v i i =5 3v , o top tr ace: ou tp ut vo lt ag e (5 v/di v) . bottom trace: in put vo lt age( 50 v/di v) . =2 2 ar es is ti ve lo ad.t im e sca le : (2 ms /d iv ). output ripple & nois eo utput load transi ent re sp ons e output vo lt a ge ri pp le at : t p1 = +25c, v i i = 53 v, o trace: output vo lt age ( 20 mv /d iv ). = 22 a resi st iv e lo ad. ti me sca le : (2 us /d iv ). output vo lt a ge re sp onse to lo ad cu rren t step - change (5.5 ?1 6.5 ?5 .5 a) at : t p1 =+25c, v i =5 3 v. c o top tr ace: ou tp ut vo lt ag e( 0. 5 v/ di v) . =2 .2 mf . bottom trace: lo ad cu rren t (5 a/ di v) . ti me sca le : (0.5 ms /d iv ) input volt age tr an si en t response output vo lt a ge res ponse to i nput vo ltage trans ie nt at : t p1 = +25c, v i = 36-7 5v , i o =1 1a re si st iv el o ad, c o top tr ace: ou tp ut vo lt a ge (2 v/di v. ). =2 .2 mf bottom trace: i nput vo lt age (2 0v /d iv .) . ti me sca le : (0.5 ms /d iv .) .
cui .com date 02/20/2013 page 8 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12 v, 22 a, 264 w output current derating ?o pen fram e 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l co ns id er at io n sectio n. output current derating ?b ase pl at et hermal re sist ance ?b as e plate 0 5 10 15 20 25 02 04 06 08 0 100 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 1 2 3 4 5 6 0. 00 .5 1. 01 .5 2. 02 .5 3. 0[ m/ s] [c/ w] availabl e lo ad cu rr en t vs . am bi en ta ir te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l c ons id er at io n sectio n. th er ma l resi st an ce vs . ai rs pe ed me as ur ed at th e co nv er te r. test ed in wi nd tu n nel wi th airf lo w and te st co ndit ions as per th e th er ma l consid er at io n se ct io n. v i output current derating ?b ase pl ate + he at si nk =5 3v . output current derating ?c old wall se al ed bo x 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 5 10 15 20 25 02 04 06 08 01 00 [c] a ta mb 85c availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e. v i =5 3v . se e th er ma l c ons id er at io n sectio n. test ed wi th plat e fin tr ansv er se he at sink , he ig ht 0. 23 in , p0114 ther ma l pa d. availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e at 85 oc am bi en t. v i = 53 v. see thermal co ns id er at io n sectio n.
cui .com date 02/20/2013 page 9 of 30 cui inc series : neb-n description : fully regulated advanced bus converters electrical specifcation 12 v, 25 a, 300 w t p1 = -40 to +90oc, v i = 40 to 60 v. typical values given at: t p1 = +25c, v i = 53 v i max i o , unless otherwise specifed under conditions. additional c out = 0.1 mf. see operating information section for selection of capacitor types. confguration file: 19010-cda1020315/002 parameter conditions/description min typ max units input voltage range (v i ) 40 60 v turn-off input voltage (v ioff ) decreasing input voltage 36 37 38 v turn-on input voltage (v ion ) increasing input voltage 38 39 40 v internal input capacitance (c i ) 11 f output power (p o ) 0 300 w effciency () 50% of max i o max i o 50% of max i o , v i = 48 v max i o , v i = 48 v 95.2 94.6 95.1 94.5 % % % % power dissipation (p d ) max i o 17 24 w input idling power (p li ) i o = 0 a, v i = 53 v 4.4 w input standby power (p rc ) v i = 53 v (turned off with rc) 0.4 w switching frequency (f s ) 0-100% of max i o 180 khz output voltage setting and ac - curacy (v oi ) t p1 = +25c, v i = 53 v, i o = 12 a 11.88 12.0 12.12 v output voltage tolerance band (v o ) 0-100% of max i o 11.76 12.24 v idling voltage (v o ) i o = 0 a 11.88 12.12 v line regulation (v o ) max i o 50 220 mv load regulation (v o ) v i = 53 v, 1-100% of max i o 45 100 mv load transient voltage deviation (v tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.5 mf oscon type 300 mv load transient recovery time (t tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.5 mf oscon type 250 s ramp-up time (t r ) - (from 10?90% of v oi ) 10-100% of max i o 8 ms start-up time (t s ) - (from v i connection to 90% of v oi ) 10-100% of max i o 23 ms v i shut-down fall time (t f ) - (from v i off to 10% of v o ) max i o i o = 0 a 0.7 6 ms s rc start-up time (t rc ) max i o 14 ms rc shut-down fall time (t rc ) - (from rc off to 10% of v o ) max i o i o = 0 a 4 6 ms s output current (i o ) 0 25 a current limit threshold (i lim ) t p1 < max t p1 27 30 33 a short circuit current (i sc ) t p1 = 25oc, see note 1 1.1 a recommended capacitive load (c out ) t p1 = 25oc, see note 2 0 2.5 10 mf output ripple & noise (v oac ) see ripple & noise section, v oi 70 140 mvp-p over voltage protection (ovp) t p1 = +25c, v i = 53 v, 10-100 % of max i o 15.6 v remote control (rc) sink current (note 3), see operating information trigger level, decreasing rc-voltage trigger level, increasing rc-voltage 2.6 2.9 0.7 ma v v note 1: ocp in hic-cup mode 2: low esr-value 3: sink current drawn by external device connected to the rc pin. minimum sink current required to guarantee activated rc function.
cui .com date 02/20/2013 page 10 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12 v, 25 a, 300 w efficienc yp ow er di ss ipati on 75 80 85 90 95 100 05 10 15 20 25 [a ] [% ] 40 v 53 v 60 v 0 4 8 12 16 20 05 10 15 20 25 [a ] [w ] 40 v 53 v 60 v efficienc y vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +2 5 c. dissipat ed po wer vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +25 c. output characteristic sc urrent limit characteristics 11.8 0 11.9 0 12.0 0 12.1 0 12.2 0 05 10 15 20 25 30 [a ] [v ] 40 v 53 v 60 v 0.00 3.00 6.00 9.00 12.0 0 15.0 0 15 20 25 30 35 [a ] [v ] 40 v 53 v 60 v o utpu t vo lt ag e vs . lo ad cu rr en t at t p1 = +25c. o utpu t vo lt ag e vs . lo ad cu rr en t at i o > ma x i o , t p1 = +25c.
cui .com date 02/20/2013 page 11 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12 v, 25 a, 300 w start-u ps hut-d ow n star t-up en ab le d by conne ct ing v i t at : p1 = +25c, v i i = 53 v, o top tr ace: out put vo lt ag e( 5 v/di v) . =2 5a re si st iv e lo ad. bottom trace: i nput vo lt age (5 0 v/ di v) . ti me sca le : (10 ms /d iv ) shut -dow n enab le d by di sconnect ing v i t at : p1 = +25c, v i i =5 3 v, o top tr ace: ou tp ut vo lt ag e (5 v/di v) . bottom trace: in put vo lt age (2 0 v/ di v) . =2 5 a re si st iv e lo ad.t im e sca le : (1 ms /d iv ). output ripple &n oi se output load transi en tr es po ns e output vo lt ag er ip pl ea t: t p1 = +25c, v i i = 53 v, o trace: output vo lt age (2 0m v/di v) . =2 5a re si st iv e lo ad. ti me sca le : (2 us /d iv ). output vo lt ag er es pons et ol oadc ur re nt step - change (6 .25- 18.7 5- 6.25 a) at : t p1 =+25c, v i top tr ace: ou tp ut vo lt ag e( 50 0m v/di v) . =5 3 v. bottom trace: lo ad cu rre nt (1 0a /d iv ). ti me scal e: (0.5 ms /d iv ) input volt age tr an si en t response output vo lt a ge res ponse to i nput vo ltage trans ie nt at: t p1 = +25c, v i = 40-60 v, i o = 25 a re si st iv e lo ad, c o top tr ace: out put vo lt ag e (2 v/di v. ). = 3. 3 mf bottom trace: i nput vo lt age (20 v/ di v. ). ti me sca le : (0.5 ms /d iv .) .
cui .com date 02/20/2013 page 12 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12 v, 25 a, 300 w output current derating ?o pen fram e 0 5 10 15 20 25 02 04 06 08 0 100 [c] [a] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s nat. conv. availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l co ns id er at io n sectio n. output current derating ?b ase pl ate thermal re sist ance ?b as e plate 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 1 2 3 4 5 6 0. 00 .5 1. 01 .5 2. 02 .5 3. 0[ m/ s] [c/ w] availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l co ns id er at io n sectio n. th er ma l resi st an ce vs . ai rs pe ed me as ur ed at th e co nv er te r. test ed in wi nd tu nn el wi th airf lo w and te st co ndit ions as per th e th er ma l consid er at io n se ct io n. v i output current derating ?b ase pl ate + he at si nk =5 3v . output current de rating ?c old wall se al ed bo x 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 5 10 15 20 25 30 02 04 06 08 0 100 [c] [a ] ta mb 85c availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e. v i =5 3v . se e th er ma l co ns id er at io n sectio n. test ed wi th plat e fin tr ansv er se he at sink , he ig ht 0. 23 in , p0114 th er ma l pa d. availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e at 85 oc am bi en t. v i = 53 v. see thermal co ns id er at io n sectio n.
cui .com date 02/20/2013 page 13 of 30 cui inc series : neb-n description : fully regulated advanced bus converters electrical specifcation 12.45 v, 22 a, 261 w t p1 = -40 to +90oc, v i = 36 to 75v. typical values given at: t p1 = +25c, v i = 53 v, max i o , unless otherwise specifed under conditions. additional cin= 0.1 mf, cout = 0.1 mf. see operating information section for selection of capacitor types. confguration file: 19010-cda 102 0315/014 parameter conditions/description min typ max units input voltage range (v i ) 36 75 v turn-off input voltage (v ioff ) decreasing input voltage 32 33 34 v turn-on input voltage (v ion ) increasing input voltage 34 35 36 v internal input capacitance (c i ) 11 f output power (p o ) 0 261 w effciency () 50% of max i o max i o 50% of max i o , v i = 48 v max i o , v i = 48 v 94.7 94.5 95.2 94.8 % % % % power dissipation (p d ) max i o 15.3 21 w input idling power (p li ) i o = 0 a, v i = 53 v 3.5 w input standby power (p rc ) v i = 53 v (turned off with rc) 0.4 w switching frequency (f s ) 0-100% of max i o 180 khz output voltage setting and ac - curacy (v oi ) t p1 = +25c, v i = 53 v, i o = 0 a 12.415 12.45 12.485 v output voltage tolerance band (v o ) 0-100% of max i o 11.5 12.7 v line regulation (v o ) max i o 100 250 mv load regulation (v o ) v i = 53 v, 1-100% of max i o 450 600 700 mv load transient voltage deviation (v tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.2 mf oscon type 350 mv load transient recovery time (t tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.2 mf oscon type 200 s ramp-up time (t r ) - (from 10?90% of v oi ) 10-100% of max i o 23 ms start-up time (t s ) - (from v i connection to 90% of v oi ) 10-100% of max i o 38 ms v i shut-down fall time (t f ) - (from v i off to 10% of v o ) max i o i o = 0 a 0.7 6 ms s rc start-up time (t rc ) max i o 26 ms rc shut-down fall time (t rc ) - (from rc off to 10% of v o ) max i o i o = 0 a 3.5 6 ms s output current (i o ) 0 22 a current limit threshold (i lim ) v o = 10.8 v, t p1 < max t p1 24 25 26 a short circuit current (i sc ) t p1 = 25oc, see note 1 7 a recommended capacitive load (c out ) t p1 = 25oc, see note 2 0 2.2 6 mf output ripple & noise (v oac ) see ripple & noise section, v oi 50 150 mvp-p over voltage protection (ovp) t p1 = +25c, v i = 53 v, 10-100 % of max i o 15.6 v remote control (rc) sink current (note 3), see operating information trigger level, decreasing rc-voltage trigger level, increasing rc-voltage 2.6 2.9 0.7 ma v v note 1: ocp in hic-cup mode 2: low esr-value 3: sink current drawn by external device connected to the rc pin. minimum sink current required to guarantee activated rc function.
cui .com date 02/20/2013 page 14 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12.4 5 v, 40 a/ 47 6w , tw o products in parallel efficien cy po we r dissipation 75 80 85 90 95 100 01 02 03 04 0[ a] [% ] 36 v 48 v 53 v 75 v 0 5 10 15 20 25 30 35 40 45 01 02 03 04 0[ a] [w ] 36 v 48 v 53 v 75 v efficienc y vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 =+ 25 c dissipa te d po wer vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +25 c output characteristic sc urrent limit ch aracter is tics 11. 8 11. 9 12. 0 12. 1 12. 2 12. 3 12. 4 12. 5 12. 6 01 02 03 04 0[ a] [v ] 36 v 48 v 53 v 75 v 3. 0 5. 0 7. 0 9. 0 11.0 13.0 40 42 44 46 48 50 52 [a ] [v ] 36 v 48 v 53 v 75 v o utpu t vo lt ag e vs . lo ad cu rr en t at t p1 ,t p3 = +25 c o utpu t vo lt ag e vs . lo ad cu rr en t at i o > ma x i o , t p1 ,t p3 = +25 c 5vct vwr 1wvrwv.qcf6tcpukgpv4gurqpug star t-up en ab le d by conne ct ing v i t at : p1 = +25c, v i i = 53 v, o top tr ace: out put vo lt ag e (5 v/di v. ). =4 0a re si st iv e lo ad. bottom trace: i nput vo lt age (5 0 v/ di v. ). ti me sca le : (20 ms /d iv .) . output vo lt a ge re sp onse to lo ad cu rren t step-chan ge (1 0-30 -1 0a ) at : t p1 =+ 25c, v i =5 3 v, c o top tr ace: ou tp ut vo lt ag e (0 .5 v/di v.). =2 .2 mf . bottom trace: output cu rr ent (20 a/di v. ). ti me sca le : (0.5 ms /d iv .) .
cui .com date 02/20/2013 page 15 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12.4 5 v, 22 a, 261 w output current derating ?o pen fram e 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l co ns id er at io n sectio n. output current derating ?b ase pl at et hermal re sist ance ?b as e plate 0 5 10 15 20 25 02 04 06 08 0 100 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 1 2 3 4 5 6 0. 00 .5 1. 01 .5 2. 02 .5 3. 0[ m/ s] [c/ w] availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l c ons id er at io n sectio n. th er ma l resi st an ce vs . ai rs pe ed me as ur ed at th e co nv er te r. test ed in wi nd tu n nel wi th airf lo w and te st co ndit ions as per th e th er ma l consid er at io n se ct io n. v i output current derating ?b ase pl ate + he at si nk =5 3v . output current derating ?c old wall se al ed bo x 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 5 10 15 20 25 02 04 06 08 01 00 [c] a ta mb 85c availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e. v i =5 3v . se e th er ma l co ns id er at io n sectio n. test ed wi th plat e fin tr ansv er se he at sink , he ig ht 0. 23 in , p0114 ther ma l pa d. availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e at 85 oc am bi en t. v i = 53 v. see thermal co ns id er at io n sectio n.
cui .com date 02/20/2013 page 16 of 30 cui inc series : neb-n description : fully regulated advanced bus converters electrical specifcation 12.45 v, 25 a, 296 w t p1 = -40 to +90oc, v i = 40 to 60 v. typical values given at: t p1 = +25c, v i = 53 v, max i o , unless otherwise specifed under conditions. additional c out = 0.1 mf. see operating information section for selection of capacitor types. confguration file: 19010-cda1020315/017 parameter conditions/description min typ max units input voltage range (v i ) 40 60 v turn-off input voltage (v ioff ) decreasing input voltage 36 37 38 v turn-on input voltage (v ion ) increasing input voltage 38 39 40 v internal input capacitance (c i ) 11 f output power (p o ) 0 296 w effciency () 50% of max i o max i o 50% of max i o , v i = 48 v max i o , v i = 48 v 95.2 94.6 95.1 94.5 % % % % power dissipation (p d ) max i o 17 24 w input idling power (p li ) i o = 0 a, v i = 53 v 4.4 w input standby power (p rc ) v i = 53 v (turned off with rc) 0.4 w switching frequency (f s ) 0-100% of max i o 180 khz output voltage setting and ac - curacy (v oi ) t p1 = +25c, v i = 53 v, i o = 0 a 12.415 12.45 12.485 v output voltage tolerance band (v o ) 0-100% of max i o 11.5 12.7 v line regulation (v o ) max i o 50 220 mv load regulation (v o ) v i = 53 v, 1-100% of max i o 400 500 700 mv load transient voltage deviation (v tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.5 mf oscon type 300 mv load transient recovery time (t tr ) v i = 53 v, load step 25-75-25% of max i o , di/dt = 1 a/s, c out = 2.5 mf oscon type 250 s ramp-up time (t r ) - (from 10?90% of v oi ) 10-100% of max i o 23 ms start-up time (t s ) - (from v i connection to 90% of v oi ) 10-100% of max i o 38 ms v i shut-down fall time (t f ) - (from v i off to 10% of v o ) max i o i o = 0 a 0.7 6 ms s rc start-up time (t rc ) max i o 14 ms rc shut-down fall time (t rc ) - (from rc off to 10% of v o ) max i o i o = 0 a 4 6 ms s output current (i o ) 0 25 a current limit threshold (i lim ) t p1 < max t p1 27 30 33 a short circuit current (i sc ) t p1 = 25oc, see note 1 11 a recommended capacitive load (c out ) t p1 = 25oc, see note 2 0 2.5 10 mf output ripple & noise (v oac ) see ripple & noise section, v oi 70 140 mvp-p over voltage protection (ovp) t p1 = +25c, v i = 53 v, 10-100 % of max i o 15.6 v remote control (rc) sink current (note 3), see operating information trigger level, decreasing rc-voltage trigger level, increasing rc-voltage 2.6 2.9 0.7 ma v v note 1: ocp in hic-cup mode, rms value were recorded. 2: low esr-value 3: sink current drawn by external device connected to the rc pin. minimum sink current required to guarantee activated rc function.
cui .com date 02/20/2013 page 17 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12.4 5v , 45 a, 53 3w , 2 products in paralle l efficienc yp ow er di ss ipat io n 75 80 85 90 95 100 01 02 03 04 05 0[ a] [% ] 40 v 53 v 60 v 0 4 8 12 16 20 01 02 03 04 05 0[ a] [w ] 40 v 53 v 60 v efficienc y vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +2 5 c. dissipat ed po wer vs. lo ad cu rr en t an d in pu t vo lt ag e at t p1 = +25 c. output characteristic sc urrent limit characteristic s 11.8 0 12.0 0 12.2 0 12.4 0 12.6 0 01 22 43 64 86 0[ a] [v ] 40 v 53 v 60 v 0.00 3.00 6.00 9.00 12.0 0 15.0 0 20 30 40 50 60 70 [a ] [v ] 40 v 53 v 60 v o utpu t vo lt ag ev s. lo ad cu rr en ta t t p1 = +25c. o utpu t vo lt ag ev s. lo ad cu rr en ta ti o >m ax i o , t p1 = +25c. start-u po utput load transi ent re sp ons e star t-up en ab le d by conne ct ing v i t at : p1 = +25c, v i i = 53 v, o top tr ace: out put vo lt ag e( 5 v/di v) . =2 5a re si st iv e lo ad. bottom trace: i nput vo lt age (5 0 v/ di v) . ti me sca le : (10 ms /d iv ) output vo lt a ge re sp onse to lo ad cu rren t step - change (6 .25- 18.7 5- 6.25 a) at : t p1 =+25c, v i top tr ace: ou tp ut vo lt ag e( 50 0 mv /d iv ). =5 3 v. bottom trace: lo ad cu rren t (1 0a /d iv ). ti me sca le : (0.5 ms /d iv )
cui .com date 02/20/2013 page 18 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ty pical characteristic s 12.4 5v , 25 a, 29 6w output current derating ?o pen fram e 0 5 10 15 20 25 02 04 06 08 0 100 [c] [a] 3.0 m/s 2.0 m/s 1.5 m/s 1.0 m/s 0.5 m/s nat. conv. availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l c ons id er at io n sectio n. output current derating ?b ase pl ate thermal re sist ance ?b as e plate 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 1 2 3 4 5 6 0. 00 .5 1. 01 .5 2. 02 .5 3. 0[ m/ s] [c/ w] availabl e lo ad cu rr en t vs . am bi en t ai r te mp er at ur e and ai rf lo w at v i =5 3v . se e th er ma l co ns id er at io n sectio n. th er ma l resi st an ce vs . ai rs pe ed me as ur ed at th e co nv er te r. test ed in wi nd tu nn el wi th airf lo w and te st co ndit ions as per th e th er ma l consid er at io n se ct io n. v i output current derating ?b ase pl ate + he at si nk =5 3v . output current derating ?c old wall se al ed bo x 0 5 10 15 20 25 02 04 06 08 01 00 [c] [a ] 3.0 m/ s 2.0 m/ s 1.5 m/ s 1.0 m/ s 0.5 m/ s nat. conv . 0 5 10 15 20 25 30 02 04 06 08 0 100 [c] [a ] ta mb 85c availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e. v i =5 3v . se e th er ma l co ns id er at io n sectio n. test ed wi th plat e fin tr ansv er se he at sink , he ig ht 0. 23 in , p0114 ther ma l pa d. availabl e lo ad cu rr en t vs . ba se pl ate te mp er at ur e at 85 oc am bi en t. v i = 53 v. see thermal co ns id er at io n sectio n.
cui .com date 02/20/2013 page 19 of 30 cui inc series : neb-n description : fully regulated advanced bus converters emc specifcation conducted emi measured according to en55022, cispr 22 and fcc part 15j (see test set-up). the fundamental switching frequency is 180 khz for neb at v i = 53 v, max i o . conducted emi input terminal value (typ) optional external flter for class b suggested external input flter in order to meet class b in en 55022, cispr 22 and fcc part 15j. layout recommendations the radiated emi performance of the product will depend on the pwb layout and ground layer design. it is also important to consider the stand-off of the product. if a ground layer is used, it should be connected to the output of the product and the equipment ground or chassis. a ground layer will increase the stray capacitance in the pwb and improve the high frequency emc performance. output ripple and noise output ripple and noise measured according to fgure below. operating information power management overview this product includes protection features that continuously safeguard the load from damage due to unexpected system faults. input voltage the neb consists of two different product families designed for two different input voltage ranges, 36 to 75 vdc and 40 to 60 vdc, see ordering information. the input voltage range 36 to 75 vdc meets the requirements of the european telecom standard ets 300 132-2 for normal input voltage range in C48 and C60 vdc systems, -40.5 to -57.0 v and C50.0 to -72 v respectively. at input voltages exceeding 75 v, the power loss will be higher than at emi without filter l1 c1 c2 c3 c4 c5 r - + mo dule + - 0 0 l2 filter components: c1 = 1 f c2 = 1 f + 220 f c3 = 1 f + 220 f c4 = 2.2 nf c5 = 2.2 nf l1 = 0.81 mh l2 = 0.81 mh emi with filter test set-up output ripple and noise test setup
cui .com date 02/20/2013 page 20 of 30 cui inc series : neb-n description : fully regulated advanced bus converters input voltage (continued) normal input voltage and tp1 must be limited to absolute max +125c. the absolute maximum continuous input voltage is 80 vdc. the input voltage range 40 to 60 vdc meets the requirements for normal input voltage range in -48 v systems, -40.5 to -57.0 v. at input voltages exceeding 60 v, the power loss will be higher than at normal input voltage and tp1 must be limited to absolute max +125c. the absolute maximum continuous input voltage is 65 vdc. turn-off input voltage the product monitors the input voltage and will turn on and turn off at predetermined levels. the minimum hysteresis between turn on and turn off input voltage is 2 v. remote control (rc) the products are ftted with a remote control function. the remote control is referenced to the primary negative input connection (-in). the rc function allows the converter to be turned on/off by an external device like a semiconductor or mechanical switch. the rc pin has an internal pull up resistor. the device should be capable of sinking 0.7 ma. when the rc pin is left open, the voltage generated on the rc pin is max 6 v. the standard product is provided with negative logic remote control and will be off until the rc pin is connected to the -in. to turn on the product the voltage between rc pin and -in should be less than 1 v. to turn off the product the rc pin should be left open for a minimum of time 150 s, the same time requirement applies when the product shall turn on. in situations where it is desired to have the product to power up automatically without the need for control signals or a switch, the rc pin can be wired directly to Cin input and output impedance the impedance of both the input source and the load will interact with the impedance of the product. it is important that the input source has low characteristic impedance. minimum recommended external input capacitance is 100 f. the performance in some applications can be enhanced by addition of external capacitance as described under external decoupling capacitors. external decoupling capacitors when powering loads with signifcant dynamic current requirements, the voltage regulation at the point of load can be improved by addition of decoupling capacitors at the load. the most effective technique is to locate low esr ceramic and electrolytic capacitors as close to the load as possible, using several parallel capacitors to lower the effective esr. the ceramic capacitors will handle high-frequency dynamic load changes while the electrolytic capacitors are used to handle low frequency dynamic load changes. ceramic capacitors will also reduce any high frequency noise at the load. it is equally important to use low resistance and low inductance pwb layouts and cabling. external decoupling capacitors will become part of the products control loop. the control loop is optimized for a wide range of external capacitance and the maximum recommended value that could be used without any additional analysis is found in the electrical specifcation. the esr of the capacitors is a very important parameter. stable operation is guaranteed with a verifed esr value of >10 m? across the output connections. for further information please contact your local cui power modules representative. parallel operation (droop load share, dls) the neb dls products are variants that can be connected in parallel. the products have a pre-confgured voltage droop: the stated output voltage set point is at no load. the output voltage will decrease when the load current is increased. the voltage will droop 0.6 v while load reaches max load. this feature allows the products to be connected in parallel and share the current with 10% accuracy. up to 90% of max output current can be used from each product. feed forward capability the neb products have a feed forward function implemented that can handle sudden input voltage changes. the output voltage will be regulated during an input transient and will typically stay within 10% when an input transient is applied. soft-start power up the rise time of the ramp up is 10 ms. when starting by applying input voltage the control circuit boot-up time adds an additional 15 ms delay. the dls variants have a pre-confgured ramp up time of 25 ms. temperature protection (otp, utp) the products are protected from thermal overload by an internal temperature shutdown protection. when tp1 as defned in thermal consideration section is exceeded the product will shut down. the product will make continuous attempts to start up and resume normal operation
cui .com date 02/20/2013 page 21 of 30 cui inc series : neb-n description : fully regulated advanced bus converters temperature protection (otp, utp) (continued) automatically when the temperature has dropped below the temperature threshold; the hysteresis is defned in general electrical specifcation. the product also has an under temperature protection. over voltage protection (ovp) the product includes over voltage limiting circuitry for protection of the load. the ovp limit is 30% above the nominal output voltage. the response from an over voltage fault is to immediately shut down. the device will continuously check for the presence of the fault condition, and when the fault condition no longer exists the device will be re-enabled. over current protection (ocp) the product includes current limiting circuitry for protection at continuous overload. the setting for the product is hic-up mode if the maximum output current is exceeded and the output voltage is below 0.3vout. above the trip voltage the product will continue to operate while maintaining the output current at the maximum output current. the load distribution should be designed for the maximum output short circuit current specifed. droop load share variants (dls) will enter hic-up mode, with a trip voltage, 0.04vout. above the trip voltage the product will continue to operate while maintaining the output current at the maximum output current. input over/under voltage protection the input of the product is protected from high input voltage and low input voltage. pre-bias start-up capability the product has a pre-bias start up functionality and will not sink current during start up if a pre-bias source is present at the output terminals. if the pre-bias voltage is lower than the target value, the product will ramp up to the target value. if the pre-bias voltage is higher than the target value, the product will ramp down to the target value and in this case sink current for a limited time. output voltage regulation the neb products are designed to be fully regulated within the plotted area. operating outside this area is not recommended. 12.0 12.2 12.4 12.6 12.8 13.0 13.2 13.4 35 45 55 65 75 vi n [v ] v out [v ] vin range: 36-75vdc 12.0 12.2 12.4 12.6 12.8 13.0 13.2 13.4 35 40 45 50 55 60 65 vi n [v ] vo ut [v ] vin range:40-60vdc thermal consideration general the product is designed to operate in different thermal environments and suffcient cooling must be provided to ensure reliable operation. for products mounted on a pwb without a heat sink attached, cooling is achieved mainly by conduction, from the pins to the host board, and convection, which is dependant on the airfow across the product. increased airfow enhances the cooling of the product. the output current derating graph found in the output section for each model provides the available output current vs. ambient air temperature and air velocity at vi =53 v. the product is tested on a 254 x 254 mm, 35 m (1 oz), 16-layer test board mounted vertically in a wind tunnel with a cross-section of 608 x 203 mm for products with base plate used in a sealed box/cold wall application, cooling is achieved mainly by conduction through the cold wall. the output current derating graphs are found in the output section for each model. the product is tested in a sealed box test set up with ambient temperatures 85, 55 and 25c.
cui .com date 02/20/2013 page 22 of 30 cui inc series : neb-n description : fully regulated advanced bus converters (best air fow direction is from negative to positive pins.) ambient temperature calculation for products with base plate the maximum allowed ambient temperature can be calculated by using the thermal resistance. 1. the power loss is calculated by using the formula ((1/) - 1) output power = power losses (p d ). = effciency of product. e.g. 95 % = 0.95 2. find the thermal resistance (r th ) in the thermal resistance graph found in the output section for each model. note that the thermal resistance can be signifcantly reduced if a heat sink is mounted on the top of the base plate. calculate the temperature increase (?t). ?t = r th x p d 3. max allowed ambient temperature is: max t p1 - ?t. e.g. neb-264 at 2m/s: 1. ((1/0.945) - 1) 264 w = 15.4 w 2. 15.4 w 3.4c/w = 52c 3. 125 c C 52c = max ambient temperature is 73c the actual temperature will be dependent on several factors such as the pwb size, number of layers and direction of airfow. position description max temperature p1 pwb (reference point, open frame and base-plate) t p1 =125o c p2 opto-coupler t p2 =105o c p3 secondary mosfet t p3 =125o c p4 magnetic core t p4 =125o c pin designation function 1 +in positive input 2 rc remote control 4 -in negative input 5 -out negative output 16 +out positive output defnition of product operating temperature the product operating temperature is used to monitor the temperature of the product, and proper thermal conditions can be verifed by measuring the temperature at positions p1, p2, p3 and p4. the temperature at these positions (tp1, tp2, tp3, tp4) should not exceed the maximum temperatures in the table below. the number of measurement points may vary with different thermal design and topology. temperatures above maximum tp1, measured at the reference point p1 (both for openframe and base plate versions) are not allowed and may cause permanent damage.
cui .com date 02/20/2013 page 23 of 30 cui inc series : neb-n description : fully regulated advanced bus converters mechanical information - hole mount, open frame version to p view pin p ositions according to r ecommended f ootprint re commended f ootprint - to p view re commended keep away area for user components. the stand-off in combination with insulating material ensures that requirements as per iec/en/ul60950 are met and 2250 v isolation maintained ev en if open vias or tr aces are present under the dc/dc con verter . we ight: ty pical 26 g all dimensions: mm [inch] to lera nces: x.x 0.50 [0.02], x.xx 0.25 [0.01] (not applied on footprint or typical v alues) pin specifica tions pin 1-5 material: copper allo y plating: min au 0.1 m over 1-3 m ni. pin 5 material: br ass plating: min au 0.2 m over 1-3 m ni. stand-off to none conductiv e components min 0.15mm [0.006] stand-off to conductiv e components min 1.25mm [0.049] pin position 3 not present due to case to ground pin not ava ilable on neb ta ble 1. x1 = ordering information
cui .com date 02/20/2013 page 24 of 30 cui inc series : neb-n description : fully regulated advanced bus converters mechanical information - hole mount, base plate version to p view pin p ositions according to r ecommended f ootprint re commended f ootprint - to p view re commended keep away area for user components. the stand-off in combination with insulating material ensures that requirements as per iec/en/ul60950 are met and 2250 v isolation maintained ev en if open vias or tr aces are present under the dc/dc con verter . we ight: ty pical 38 g all dimensions: mm [inch] to lera nces: x.x 0.50 [0.02] x.xx 0.25 [0.01] (not applied on footprint or typical v alues) case material: aluminum fo r screw attachment apply mounting torque of max 0.44 nm [3.9 lbf in]. m3 screws must not protrude more than 2.7mm [0.106] into the base plate. pin specifica tions pin 1-5 material: copper allo y plating: min au 0.1 m over 1-3 m ni. stand-off to none conductiv e components min 0.15mm [0.006] stand-off to conductiv e components min 1.25mm [0.049] pin position 3 not present due to case to ground pin not ava ilable on neb ta ble 1. x1 = ordering information
cui .com date 02/20/2013 page 25 of 30 cui inc series : neb-n description : fully regulated advanced bus converters mechanical information - surface mount version to p view pin p ositions according to r ecommended f ootprint re commended f ootprint - to p view re commended keep away area for user components. the stand-off in combination with insulating material ensures that requirements as per iec/en/ul60950 are met and 2250 v isolation maintained ev en if open vias or tr aces are present under the dc/dc con verter . we ight: ty pical 24 g all dimensions: mm [inch] to lera nces: x.x 0.50 [0.02] x.xx 0.25 [0.01] (not applied on footprint or typical v alues) pin specifica tions pin 1-5 material: copper allo y plating: min au 0.1 m over 1-3 m ni. pin position 3 not present due to case to ground pin not ava ilable on neb stand-off to none conductiv e components min 0.15mm [0.006] stand-off to conductiv e components min 1.25mm [0.049]
cui .com date 02/20/2013 page 26 of 30 cui inc series : neb-n description : fully regulated advanced bus converters soldering information - surface mounting the surface mount product is intended for forced convection or vapor phase refow soldering in snpb and pb-free processes. the refow profle should be optimised to avoid excessive heating of the product. it is recommended to have a suffciently extended preheat time to ensure an even temperature across the host pwb and it is also recommended to minimize the time in refow. a no-clean fux is recommended to avoid entrapment of cleaning fuids in cavities inside the product or between the product and the host board, since cleaning residues may affect long time reliability and isolation voltage. average ramp-up (t pr od uct )3 c/s ma x3 c/s ma x ty pi ca l so ld er me lt in g (liq uidu s) te mp er at ur e t1 83 c l 221 c mini mu m re fl ow ti me ab ov e t l 60 s6 0 s mini mu m pi n te m per at ur et 210 c pi n 235 c peak pr od uc t te mp er at ur et 225 c produc t 260 c average ramp-dow n (t pr od uct )6 c/s ma x6 c/s ma x ma xi mu m ti me 25 c to pe ak 6 mi nute s 8 mi nute s t pr od uct ma xi mu m t pi n mi ni mu m t i m e n i p pr of ile pr od uc t pr of ile t l ti me in re fl ow ti me in pr eh ea t / so ak zo ne ti me 25 c to pe ak t e m p e r a t u r e general reflow process specifications snpb eutectic pb-free minimum pin temperature recommendations pin number 5 chosen as reference location for the minimum pin temperature recommendation since this will likely be the coolest solder joint during the refow process. snpb solder processes for snpb solder processes, a pin temperature (t pin ) in excess of the solder melting temperature, (t l , 183c for sn63pb37) for more than 60 seconds and a peak temperature of 220c is recommended to ensure a reliable solder joint. for dry packed products only: depending on the type of solder paste and fux system used on the host board, up to a recommended maximum temperature of 245c could be used, if the products are kept in a controlled environment (dry pack handling and storage) prior to assembly. lead-free (pb-free) solder processes for pb-free solder processes, a pin temperature (t pin ) in excess of the solder melting temperature (t l , 217 to 221c for snagcu solder alloys) for more than 60 seconds and a peak temperature of 245c on all solder joints is recommended to ensure a reliable solder joint. snpb solder processes for snpb solder processes, the product is qualifed for msl 1 according to ipc/jedec standard j std 020c. during refow t product must not exceed 225 c at any time. top of the product pwb near pin 2 is chosen as reference location for the maximum (peak) allowed product temperature (t product ) since this will likely be the warmest part of the product during the refow process. maximum product temperature requirements pb-free solder processes for pb-free solder processes, the product is qualifed for msl 3 according to ipc/jedec standard j-std-020c. during refow t product must not exceed 260 c at any time. dry pack information products intended for pb-free refow soldering processes are delivered in standard moisture barrier bags according to ipc/jedec standard j std 033 (handling, packing, shipping and use of moisture/refow sensitivity surface mount devices). using products in high temperature pb-free soldering processes requires dry pack storage and handling. in case the products have been stored in an uncontrolled environment and no longer can be considered dry, the modules must be baked according to j std 033. thermocoupler attachment top of pwb near pin 2 for measurement of maximum product temperature, t product pin 5 for measurement of minimum pin (solder joint) temperature, t pin
cui .com date 02/20/2013 page 27 of 30 cui inc series : neb-n description : fully regulated advanced bus converters soldering information - hole mounting the hole mounted product is intended for plated through hole mounting by wave or manual soldering. the pin temperature is specifed to maximum to 270c for maximum 10 seconds. a maximum preheat rate of 4c/s and maximum preheat temperature of 150c is suggested. when soldering by hand, care should be taken to avoid direct contact between the hot soldering iron tip and the pins for more than a few seconds in order to prevent overheating. a no-clean fux is recommended to avoid entrapment of cleaning fuids in cavities inside the product or between the product and the host board. the cleaning residues may affect long time reliability and isolation voltage. delivery package information the products are delivered in antistatic injection molded trays (jedec design guide 4.10d standard) and in antistatic trays tr ay specif ic at io ns ?s md /pin in past e ma te ri al anti stat ic pp e surface resistance 10 5 < oh m/square < 10 bakability 12 the trays can be bake d at ma xi mu m 125c for 48 hour s tr ay thi cknes s 17.4 0m m0 .685 [i nc h] box capaci ty 100p roduc ts (5 full tr ays/bo x) tr ay weight 125g em pt y, 605g full tray jedec standard tray for 2x5 = 10 products. all dimensions in mm [inch] tolerances: x.x 0.26 [0.01], x.xx 0.13 [0.005] note: pick up positions refer to center of pocket. see mechanical drawing for exact location on product.
cui .com date 02/20/2013 page 28 of 30 cui inc series : neb-n description : fully regulated advanced bus converters ma te ri al pe fo am , di ss ipativ e surface resistance 10 5 < oh m/square < 10 bakability 12 the trays are not ba keable tr ay capacity 25 converters/tra y box capaci ty 75 produc ts (3 full tr ay s/ box) we ight product ?o pen fr am e 790g full tr ay, 140g em pt y tr ay produc t ?b as e plat e optio n 1090 g full tray, 140 g em pty tray tray specifications - through hole version
cui .com date 02/20/2013 page 29 of 30 cui inc series : neb-n description : fully regulated advanced bus converters product qualifcation specifcation characteristic s ex ternal vis ual in spection ip c- a-610 change of te mperatur e (tem peratur e cy cling) ie c 60068-2-14 na te m perature rang e num ber of cy cl es dw ell/transfer ti me -40 to 100c 500 15 mi n/0-1 mi n cold (in operation) ie c 60068-2-1 ad te m perature t dura tion a -45 c 72 h da mp heat ie c 60068-2-67 cy te m peratur e hu mi di ty dura tion 85 c 85 % rh 1000 hours dry heat ie c 60068-2- 2b d te m peratur e dura tion 125c 1000 h elec tr ostati c disc harge su sc eptib ilit y ie c 61340-3-1, jesd 22 -a 114 ie c 61340-3-2, jesd 22 -a 115 hu ma n body m odel (h bm ) ma ch ine m odel (mm) clas s 2, 2000 v clas s 3, 200 v im me rs ion in cl eaning solvent si ec 6006 8-2-45 xa , me thod 2 wa te r glycol et her isopr opyl alc ohol 55 c 35c 35 c mec hani ca l shoc ki ec 60068 -2-27 ea peak acceleration dura tion 100 g 6 ms mo isture reflow se ns itiv it y j- st d-020 c 1 level 1 (snpb-eut ec ti c) level 3 (pb free) 225c 260c operational li fe te st mi l-std-202g, me thod 108 ad uration 1000 h re si st anc e to solder ing hea t ie c 60068-2-20 tb, me thod 1a 2 solder te mperatur e dura tion 270c 10-13 s robustness of te rm inations ie c 60068-2-21 te st ua 1 ie c 60068-2-21 te st ue 1 through hole m ount products surfac e m ount product s all lead s all lead s solderability ie c 60068-2-58 te st td 1 ie c 60068-2-20 te st ta precondi tioning 2 te m perature, snpb eu te ct ic te m perature, pb-fre e precondi tioning te m perature, snpb eu te ct ic te m perature, pb-fre e 150c dry bak e 16 h 215c 235c stea m agein g 235c 245c vibration, br oad band rando mi ec 60068-2-64 fh , me thod 1 frequency spectral density dura tion 10 to 500 hz 0.07 g 2 10 mi n in eac h directio n /h z notes: 1 only for products intended for refow soldering (surface mount products) 2 only for products intended for wave soldering (plated through hole products)
cui inc series : neb-n description : fully regulated advanced bus converters date 02/20/2013 page 30 of 30 novum is a trademark of cui. all other trademarks are the property of their respective owners. cui offers a two (2) year limited warranty. complete warranty information is listed on our website. cui reserves the right to make changes to the product at any time without notice. information provided by cui is believed to be accurate and reliable. however, no responsibility is assumed by cui for its use, nor for any infringements of patents or other rights of third parties which may result from its use. cui products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. headquarters 20050 sw 112th ave. tualatin, or 97062 800.275.4899 fax 503.612.2383 cui .com techsupport@cui.com rev. description date 1.0 initial release 02/20/2013 the revision history provided is for informational purposes only and is believed to be accurate. revision history

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