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ds_v4 8s c12007 _ 08212013 features ? high efficiency: 92. 0 % @ 12 v/ 7.5 a ? size: 33.0 x 22.8x 9.5 mm ( 1.30 x 0.90 x 0.3 7 ) ? industry standard footprint and pinout ? fixed frequency ope ration ? smd or t hrough - hole versions ? input uvlo ? otp and o utput ocp, ovp ? output voltage trim: - 2 0%, +10% ? monotonic startup into normal and pre - biased loads ? 1500 v isolation and b asic insulation ? no minimum load required ? no negative current during power or ena ble on/off ? iso 900 1 , tl 9000, iso 14001 , qs 9000, ohsas18001 certified manufacturing facility ? ul/cul 60950 - 1 (us & canada ) recognized applications ? optical transport ? data networking ? communications ? servers options ? smd pins ? short pin lengths available ? posi tive remote on/off ? heat spreader delphi series v48 sc , 1/16th brick 9 0 w dc/dc power modules: 48v in, 12 v , 7.5 a out the delphi series v 48s c , 1/16 th brick, 48v input, single output , isolated dc/dc converters, are the latest offering from a world leader in power systems technology and manufacturing D delta electronics, inc. this product family provides up to 90 watts of power or 30 a of output current in the 1/16 th brick form factor (1.3x0.90) and pinout. with c reative design technology and optimization of component placement , these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. typical efficiency of the 12 v/ 7.5 a module is greater than 9 2. 0 %. all modules a re protected from abnormal input/output voltage, current, and temperature conditions. for lower power needs, but in a similar small form factor, please check out delta v36se (50w), s48sp (36w or 10a) and s36se (17w or 5a) series standard dc/dc modules.
ds_v48s c12007 _ 08212013 2 technical specificat ions ( t a =25c, airflow rate=300 lfm, v in =48vdc, nominal vout unless otherwise noted.) parameter notes and conditions v 4 8s c12007 (st andard) min. typ. max. units absolute maximum ratings input voltage continu ous 80 vdc transient (100ms) 100ms 100 vdc operating ambient temperature - 40 85 c storage temperature - 55 125 c input/output isolation voltage 1500 vdc input characteristics operating input voltage 36 48 75 vdc input under - voltag e lockout turn - on voltage threshold 3 2 .5 34 .5 35 .5 vdc turn - off voltage threshold 29.5 3 1.5 33 .5 vdc lockout hysteresis voltage 1 .5 3 4 vdc maximum input current 100% load, 36vin 4 a no - load input current 6 0 ma off converter input curren t 8 1 2 ma inrush current (i 2 t) with 100uf external input capacitor 1 a 2 s input reflected - ripple current p - p thru 12h inductor, 5hz to 20mhz 20 ma input voltage ripple rejection 120 hz - 60 db output characteristics output voltage set poin t vin=48v, io=io.max, tc=25c 11.8 2 12 12.18 vdc output voltage regulation over load io=io, min to io, max 5 mv over line vin=36v to 75v 5 mv over temperature tc= - 40c to 1 25 c 180 mv total output voltage range over sample load, line and temperature 11.64 12.36 v output voltage ripple and noise 5hz to 20mhz bandwidth peak - to - peak max load on output, 20mhz bandwidth 10u f tantalum + 1uf ceramic capacitor 100 mv rms max lo ad on output, 20mhz bandwidth 1 0uf tantalum + 1uf ceramic capacitor 3 0 mv operating output current range 0 7.5 a output over current protection output voltage 10% low 110 140 % dynamic characteristics output voltage current transient load capacitor 1 0uf tantalum + 1u ceramic 0.1 a/us frequency= 250h z positive step change in output current 50% io.max to 75% io.max 3 0 0 mv negative step change in output current 75% io.max to 50% io.max 3 0 0 mv settling time (within 1% vout nominal) 200 us turn - on transient start - up delay time, from o n/off control or input from on/off control or input to 10%vo 1 5 ms start - up rise time , from on/off control or input from 10%vo to 90% vo 40 ms maximum output capacitance full load; 5% overshoot of vout at start up; 0 3300 f efficiency 100% load vin=48v 92 . 0 % 60% load vin=48v 92 .0 % isolation characteristics input to output 1500 vdc isolation resistance 10 m isolation capacitance 1 0 00 pf feature characteristics switching frequency 420 khz on/off control , negative remote on/off logic logic low (module on) von/off 0 0.7 v logic high (module off) von/off 2.4 5 v on/off control, positi ve remote on/off logic logic low (module off) von/off 0 0.7 v logic high (module on) von/off 2.4 5 v on/off current (for both remote on/off logic) ion/off at von/off=0.0v 1 ma on/off current (for both remote on/off logic) ion/off at von/off= 2 .4 v ua leakage current (for both remote on/off logic) logic high, von/off= 5 v ua output voltage trim range m ax rated current guarantee d at full trim range - 2 0 10 % output voltage remote sense range m ax rated current guarantee d at full remote s ense range 10 % output over - voltage protection over full temp range; % of nominal vout 110 140 % general specifications mtbf p er telecordia sr - 332, 8 0% load, 25 c, 48vin, 3 00lfm 4.9 m hours weight open frame 15 grams over - temperature shutd own (hot spot) refer to figure 2 2 for hot spot location (48vin,80% io , 200lfm,airflow from vout+ to vin+) 127 132 137 c over - temperature shutdown (ntc resistor) refer to figure 2 2 for ntc resistor location 120 125 130 c n ote: please attach thermocouple on ntc resistor to test otp function, the hot spots temperature is just for reference.
ds_v48s c12007 _ 08212013 3 electrical character istics curves figure 1: efficiency vs. load current for minimum, nominal, and maximum input voltage at 2 5c figure 2: power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 3: typical full load input characteristics at room temperature
ds_v48s c12007 _ 08212013 4 electrical character istics curves for negative remote on/off start u p figure 4: turn - on transient at full rated load current ( 10 ms/div). vin=48v. top trace: vout , 5 .0 v/div; bottom trace: on/off input, 5 v/div figure 5: turn - on transient at zero load current ( 10 ms/div). vin=48v. top trace: vout: 5 .0 v/div , bottom trace: on/off input , 5 v/div for input voltage start up figure 6 : turn - on transient at full rated load current ( 10 ms/div). vin=48v. top trace: vout , 5 .0 v/div; bottom trace: vin , 5 0 v/div figure 7: turn - on transient at zero lo ad current ( 10 ms/div). vin=48v. top trace: vout , 5 .0 v/div; bottom trace: vin , 5 0 v/div figure 8: output voltage response to step - change in load current (75% - 50% - 75% of io, max; di/dt = 0.1a/s). load cap: 10f tantalum capacitor and 1f ceramic cap acitor. top trace: vout ( 0.1 5 v/div, 200us /div ), bottom trace: iout ( 5 a/div). scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module
ds_v48s c12007 _ 08212013 5 electrical characteristics curv es figure 9 : test set - up diagram showing measurement points for input terminal ripple current and input reflected ripple current. note: measured input reflected - ripple current with a simulated source inductance (l tes t ) of 12 h. capacitor cs offset possible battery impedance. measure current as shown above figure 1 0 : input terminal ripple current, i c , at full rated output current and nominal input voltage with 12h source impedance and 33f electrolytic capacitor ( 20 0 ma/div , 1 us /div ) figure 1 1 : input reflected ripple current, i s , through a 12h source inductor at nominal input voltage and rated load current (20 ma/div , 2 us /div ) figure 1 2 : output voltage noise and ripple measurement test setup figure 1 3 : ou tp ut voltage ripple at nominal input volta ge and rated load current (io=7.5 a)(50 mv/div, 1us/div) load capacitance: 1f ceramic capacitor and 10f tantalum capacitor. bandwidth: 20 mhz. scope measurements should be made using a bnc cable (length sho rter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module. strip copper vo(-) vo(+) 10u 1u scope resistive load vin + vin - is ic 100uf, esr=0.2 ohm @ 25 o c 100khz cs: 220uf + + vin + vin - is ic 100uf, esr=0.2 ohm @ 25 o c 100khz cs: 220uf + + is ic 100uf, esr=0.2 ohm @ 25 o c 100khz cs: 220uf + + + +
ds_v48s c12007 _ 08212013 6 figure 1 5 - emi test negative line figure 1 6 - emi test posi tive line safety considerations the power module must be installe d in compliance with the spacing and separation requirements of the end - users safety agency standard, i.e., ul60950 - 1, c sa c22.2 no. 60950 - 1 2nd and iec 60950 - 1 2nd : 2005 and en 60950 - 1 2nd: 2006+a11+a1: 2010, if the system in which the power module is to be used must meet safety agency requirements. basic insulation based on 75 vdc input is provided between the input and output of the module for the purpose of applying insulation requirements when the input to this dc - to - dc converter is identified as tnv - 2 or selv. an additional evaluation is needed if the source is other than tnv - 2 or selv. when the input source is sel v circuit , the power module meets selv (safety extra - low voltage) requirements. if the input source is a hazardous voltage which is greater than 60 vdc and less than or equal to 75 vdc, for the modules output to meet selv requirements, all of the followin g must be met: design consideration s input source impedance the impedance of the input source connecting to the dc/dc power modules will interact with the modules and affect the stability. a low ac - impedance input source is recommended. if the source inductance is more than a few h, we advise adding a 100 f electrolytic capacitor (esr < 0.7 at 100 khz) mounted close t o the input of the module to improve the stability. layout and emc considerations deltas dc/dc power modules are designed to operate in a wide variety of systems and applications. for design assistance with emc compliance and related p w b layout issues, please contact deltas technical support team. an external input filter module is available for easier emc compliance design. below is the reference design for an input filter tested with v48sc120xxx to meet en55022 (vde0878) class a(both q. peak and avera ge) schematic and components list figure 1 4 - emi test schematic c1= 3.3 uf/100 v c2= 47uf/100 v c3= 47uf/100 v c4=c5=1nf/250volt t1= 1m h , type p53910(pulse) test result: at t = +25 ? c , vin = 48 v and full load yellow line is quasi peak mode; blue line is average mode.
ds_v48s c12007 _ 08212013 7 ? the input source must be insulated from the ac mains by reinforced or double insulation. ? the input terminals of the module are not operator accessible. ? a selv reliability test is conducted on the system where the module is used , in combi nation with the module, to ensure that under a single fault, hazardous voltage does not appear at the modules output. soldering and cleaning considerations post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the fin ished circuit board assembly test. adequate cleaning and/or drying is especially important for un - encapsulated and/or open frame type power modules. for assistance on appropriate soldering and cleaning procedures, please contact deltas technical support t over - current protection the modules include an internal output over - current protection circuit, which will endure current limiting for an unlimited duration during output overload. if the output current exceeds the ocp set point, the modules will aut omatically shut down, and enter hiccup mode or latch mode, which is optional , the default is hiccup mode. for hiccup mode, the module will try to restart after shutdown. if the over current condition still exists, the module will shut down again. this res tart trial will continue until the over - current condition is corrected. over - voltage protection the modules include an internal output over - voltage protection circuit, which monitors the voltage on the output terminals. if this voltage exceeds the over - v oltage set point, the module will shut down, and enter in hiccup mode or latch mode, which is optional , the default is hiccup mode. for hiccup mode, the module will try to restart after shutdown. if the over voltage condition still exists, the module will shut down again. this restart trial will continue until the over - voltage condition is corrected. for latch mode, the module will latch off once it shutdown. the latch is reset by either cycling the input power or by toggling the on/off signal for one sec ond. over - temperature protection the over - temperature protection consists of circuitry that provides protection from thermal damage. if the temperature exceeds the over - temperature threshold the module will shut down, and enter in auto - restart mode or lat ch mode, which is optional , the default is auto - restart mode . for auto - restart mode, the module will monitor the module temperature after shutdown. once the temperature is dropped and within the specification, the module will be auto - restart. remote on/ off the remote on/off feature on the module can be either negative or positive logic. negative logic turns the module on during a logic low and off during a logic high. positive logic turns the modules on during a logic high and off during a logic low. re mote on/off can be controlled by an external switch between the on/off terminal and the v i ( - ) terminal. the switch can be an open collector or open drain. for negative logic i f the remote on/off feature is not used, please short the on/off pin to vi( - ). fo r pos i tive logic i f the remote on/off feature is not used, please leave the on/off pin floating . figure 1 7 : remote on/off implementation remote sense remote sense compensates for voltage drops on the output by sensing the actual output voltage at the point of load. the voltage between the remote sense pins and the output terminals must not exceed the output voltage sense range given here: [vo(+) C vo( C )] C [sense(+) C sense( C )] 10% v out this limit includes any increase in voltage due to remote se nse compensation and output voltage set point adjustment (trim). vo(+) vi(+) vo(-) sense(-) sense(+) vi(-) on/off
ds_v48s c12007 _ 08212013 8 features description s (con.) figure 1 8 : effective circuit configuration for remote sense operation if the remote sense feature is not used to regulate the output at the point of load, p lease connect sense(+) to vo(+) and sense( C C when using remote sense and trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current. m ax rated current is guarantee d at full output voltage remote sense range. output voltage a djustment (trim) to increase or decrease the output voltage set point, connect an external resistor between the trim pin and either the sense(+) or sense( - ). the trim pin should be left open if this feature is not used. figure 1 9 : circuit configuratio n for trim - down (decrease output voltage) if the external resistor is connected between the trim and sense ( - ) pins, the output voltage set point decreases (fig. 1 9 ). the external resistor value required to obtain a percentage of output voltage change ex. when trim - down - 10% ( 12 v0.9= 10.8 v) figure 20 : circuit configuration for trim - up (increase output voltage) if the external resistor is connected between the trim and sense ( + ) th e output voltage set point increases (fig. 20 ). the external resistor value require d to obtain a percentage output voltage change vi(-) vi(+) vo(-) vo(+) sense(+) sense(-) resistance contact contact and distribution losses ? ? ? ? ? ? ? ? ? ? ? ? ? k down rtrim 22 . 10 511 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? k k down rtrim 88 . 40 22 . 10 10 511 ? ? ? ? ? ? ? ? ? ? ? k up rtrim 22 . 10 511 1.225 ) (100 vo 11 . 5 ? ? ? ? ? ? ? ? ? ? ? ? k up rtrim 31 . 489 22 . 10 10 511 10 225 . 1 ) 10 100 ( 12 11 . 5
ds_v48s c12007 _ 08212013 9 thermal consideratio ns thermal management is an important part of the system design. to ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. convection cooling is usually the dominant mode of heat transfer. hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. thermal testing setup deltas dc/dc power modules are characterized in 6.35mm (0.25). figure 21 : wind tunnel test setup thermal derating heat can be removed by increasing airflow over the module. to enhance system reliability, the power module should always be operated below the maximum operating temperature. if the temperature exceeds the maximum module temperature, reliability of the unit may be affected. thermal curves figure 2 2 : * hot spot & ntc resistor temperature measurement location figure 2 3 : output current vs. ambient temperature and air velocity @ vin=48v (either orientation) note: wind tunnel test setup figure dimensions are in millimeters and (inches) 12.7 (0.5) module air flow 50.8 (2.0) facing pwb pwb air velocity and ambient temperature measured below the module hot spot ntc resistor airflow v48sc12007(standard) output current vs. ambient temperature and air velocity @vin = 48v (either orientation) 0 1 2 3 4 5 6 7 8 25 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature ( ) output current (a) natural convection 100lfm 200lfm 300lfm 400lfm 500lfm 600lfm
ds_v48s c12007 _ 08212013 10 pick and place locat ion recommended pad layo ut (smd) surface - mount tape & reel
ds_v48s c12007 _ 08212013 11 lea ded (sn/ pb ) process recommend temp. profile note: the temperature refers to the pin of v48 s c , measured on the pin +vout joi nt. lead free (sac) proc ess recommend temp. profile note: the temperature refers to the pin of v48 s c , measured on the pin +vout joint. temp . time 150 200 100~140 sec. time limited 90 sec. above 217 217 preheat time ramp up max. 3 ramp down max. 4 peak temp. 240 ~ 245 25
ds_v48s c12007 _ 08212013 12 mechanical drawing s urface - mount module t hrough - hole module pin no. name function 1 2 3 4 5 6 7 8 + vin on/off - vin - vout - sense trim + sense + vout positive input voltage remote on/off nega tive input voltage negative output voltage negative remote sense output voltage trim positive remote sense positiv e output voltage pin specification: (through - hole) pins 1 ~3,5~7 1.0 0 mm (0.040) diameter pins 4 & 8 2. 1.50 mm (0.0 59 ) diameter all pins are copper alloy with matte tin over ni plated.
ds_v48s c12007 _ 08212013 13 part numbering syste m v 48 s c 120 07 n r f a type of product i nput voltage number of outputs product series output voltage output current on/off logic pin length/type option code v - 1/16 b rick 48 - 36v~75v s - single c - serial number 120 C 12 v 07 C 7.5 a n - negative p - positive r - 0.170 n - 0.145 k - 0.1 10 m C smd f - rohs 6/6 (lead free) s pace - rohs5/6 a - standard functions b - no sense and trim pin model list model name input output eff @ 100% load v48s c12007 n m fa 36~75v 4 a 12 v 7.5 a 92% v48s c12007 n m f b 36~75v 4 a 12.1 v 7.5 a 92% v48s c12007 n r fa 36~75v 4 a 12 v 7.5 a 92% default remote on/off logic is negative and pin length is 0.170 for different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales office . c ontact: www.deltaww.com/dcdc usa: telephone: east coast: 978 - 656 - 3993 west coast: 510 - 668 - 5100 fax: (978) 656 3964 email: dcdc@delta - corp.com europe: p hone: +31 - 20 - 655 - 0967 fax: +31 - 20 - 655 - 0999 email : dcdc @ delta - es.com asia & the rest of world : telephone: +886 3 4526107 e xt 6220 ~6224 fax: +886 3 4513485 email: dcdc@delta.com.tw warranty delta offers a two ( 2) year limited warranty. complete warranty information is listed on our web site or is available upon request from delta. information furnished by delta is believed to be accurate and reliable. however, no responsibility is assumed by delta for it s use, nor for any infringements of patents or other rights of third parties, which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of delta. delta reserves the right to revise these specificatio ns at any time , without notice .
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