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(888) 597-wall www.wallindustries.com 1 of 14 technical datasheet LANC2415DW8 dc/dc converter 18-36 vdc input 15 vdc output at 0.267a applications: ? distributed power architectures ? communications equipment ? computer equipment ? work stations features: ? rohs compliant ? dual output ? standard 24 pin dip and smt package ? five-sided continuous shield ? no minimum load required ? high power density ? high efficiency up to 87% ? small size: 1.25 x 0.8 x 0.450 inches ? input to output isolation (1600vdc) ? 2:1 wide input voltage range ? fixed switching frequency ? input under-voltage protection ? over-current protection ? output short circuit protection ? remote on/off description: the lancw8 dual output series offers 8 watts of output powe r from a package in an ic compatible 24 pin dip and smt configuration. lancw8 dual output series has 2:1 wide input voltage of 9-18vdc, 18-36vdc, and 36-75vdc. the lancw8 dual output series features 1600vdc of isolation, short circuit protection, and five sided shielding. all models are particularly suited for telecommunications, industrial, mobile telecom, and test equipment applications. ul tuv cb ce mark
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 2 of 14 technical specifications m m o o d d e e l l n n o o . . LANC2415DW8 all specifications are based on 25 o c, nominal input voltage and maximum ou tput current unless otherwise noted. we reserve the right to change speci fications based on te chnological advances. specification related condition min nom max unit switching frequency test at nominal vin and full load 300 khz input (v in ) operating voltage range 18 24 36 vdc input voltage (continuous) 40 vdc input voltage (transient 100ms) 50 vdc input standby current nominal vin and no load 13 ma input voltage variation complies w ith est300 132 part 4.4 5 v/ms input current nominal vin and full load 411 ma reflected ripple current 5 to 20mhz, 12h source impedance (see the test setup section - pg 8) 20 ma pk-pk efficiency test at nominal vin and full load (see the test setup section ? pg 8) 85 % output (v o ) operating output range nominal vin and full load 14.85 15.0 15.15 vdc load regulation 0% to 100% full load -1.0 +1.0 % line regulation ll to hl at full load -0.2 +0.2 % cross regulation asymmetrical load 25% / 100% of full load -5.0 +5.0 % output ripple & noise 5hz to 20mhz bandwidth (see the test setup section - pg 8) 50 mv pk-pk output current 0 0.267 a output voltage overshoot ll to hl at full load 0 3 % vout over current protection 150 % fl short circuit protection continuous, automatic recovery dynamic load response test at nominal vin peak deviation load step change from 75 to 100% or 100 to 75 % of fl 200 mv setting time (vout < 10% peak deviation) 200 s remote on/off the on/off pin voltage is referenced to -vin (see the remote on/off control section - pg 5) on/off pin high voltage (remote on) 3.5 12 vdc on/off pin low voltage (remote off) 0 1.2 vdc on/off pin low voltage, input current 2.5 ma start up time test at nominal vin and constant resistive load power up 700 ms remote on/off 5 ms isolation isolation voltage (input-output) 1600 vdc isolation voltage (output to case?dip type) 1600 vdc isolation voltage (output to case?smt type) 1000 vdc isolation voltage (input to case - dip type) 1600 vdc isolation voltage (input to case - smt type) 1000 vdc isolation resistance 1 g ? isolation capacitance 300 pf environmental operating ambient temperature (w/ derating) -40 85 o c operating case temperature 100 o c storage temperature -55 105 o c temperature coefficient -0.02 +0.02 % / o c mtbf see the mtbf and reliab ility section (pg 13) bellcore tr-nwt-000332, t c =40c 3,050,000 hours mil-std-217f 1,880,000 hours mechanical see figure 1 weight 18.0 grams dimensions 1.25 x 0.8 x 0.450 inches
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 3 of 14 figure 1: mechanical dimensions table 1 pin size is 0.02(0.5) dia o r 0.01 x 0.02 (0.25 x 0.50) rectangular pin 14 23 22 16 3 9 2 1 11 1.25 (31.8) 0.60(15.2) 0.80(20.3) 0.40 (10.2) 0.15 (3.8) 0.80 (20.3) 0.20 (5.1) 0.08(2.0) bottom view 1. all dimensions are in inches (mm) tolerance: x.xx0.02 (x.x0.5) 2 . pin pitch tolerance 0.014(0.35) dip type pin connection pin define pin define 1 ctrl 2 -input 23 +input 3 -input 22 +input 9 common 16 common 11 -output 14 +output suffix-s 1.00(25.4) 0.92(23.4) 0.44(11.2) 0.43(10.9) 0.10 (2.54) 0.15 (3.81) 0.25 (6.35) 1.26 (32.0) 0.80(20.3) 0.02(0.5) 24 13 16 20 12 1 5 9 bottom view pin area 0.04 x 0.02 (1.0 x 0.5) 1. all dimensions in inches (mm) tolerance: x.xx0.02 (x.x0.5) 2. pin pitch tolerance 0.014(0.35) pin connection pin define pin define 1 ctrl 2 -input 23 +input 3 -input 22 +input 9 common 16 common 11 -output 14 +output others nc others nc table 2 smt type
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 4 of 14 input source impedance the power module should be connected to a low impe dance input source. highly inductive source impedance can affect the stability of the pow er module. input external l-c filte r is recommended to minimize input reflected ripple current. the inductor is simulated s ource impedance of 12h and capacitor is nippon chemi-con kze series 47f/100v. the capacitor must as close as pos sible to the input terminal s of the power module for lower impedance. thermal consideration the power module operates in a variety of thermal e nvironments. however, sufficient cooling should be provided to help ensure reliable op eration of the unit. heat is remove d by conduction, convention, and radiation to the surrounding enviro nment. proper cooling can be verified by m easuring the point as the figure below. the temperature at this location should not exceed 105c. when operating, adequate cooling must be provided to maintain the test point temperature at or below 105c. although the maxi mum point temperature of the power modules is 105c, you can limit this temperature to a lower value for extremely high reliability. design considerations: output over current protection when excessive output currents occur in the system, circuit protection is required on all power supplies. normally, overload current is maintained at approxima tely 150% of rated current for the lancw8 dual output series. fold back-mode is a method of operation in a power s upply whose purpose is to prot ect the power supply from being damaged during an over-current fa ult condition. it also enables the pow er supply to operate normally when the fault is removed. one of the problems resulting from over current is that excessive heat may be gene rated in power devices; especially mosfet and schottky diodes and the temperature of those devices may exceed their specified limits. a protection mechanism has to be used to pr event those power devices from being damaged. the operation of fold back is as follows. when the curr ent sense circuit sees an over-current event, the output voltage of the module will be decreased for low power dissipation and decrease the heat of the module. figure 3 0.625 (15.9) 0.4 (10.15) measurement shown in inches and millimeters figure 2 top view
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 5 of 14 remote on/off control the positive logic remote on/off control circuit is included. turns the module on during a logic high on the on/off pi n and turns off during a logic low. the on/off pin is an open collector/drain logic input signal (von/off) that?s referenced to gnd. if not using the remote on/off feature, please open circu it between on/off pin and ?input pin to turn the module on. remote on/off implementation figure 4 figure 5 isolated-closure remote on/off level control using ttl output level control using line voltage figure 6
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 6 of 14 graph 1: efficiency vs. output current graph 2: efficiency vs. input voltage (full load) graph 3: output power vs. ambient temperature & airflow (nominal vin) graph 4: power dissipation vs. output current graph 5: conducted emission of en55022 class a (nominal vin and full load) graph 6: conducted emission of en55022 class b (nominal vin and full load) % of full load input voltage (v) a mbient temperature, ta (c) efficiency (%) efficiency (%) output power (%) power dissipation (w) % of full load 18v 24v 36v v in=18v v in=24 v v in=36 v natural convection 100lfm 200lfm 300lfm 400lfm 500lfm frequency frequency
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 7 of 14 graph 7: typical input start-up and output rise characteristic (nominal vin and full load) graph 8: typical output ripple and noise (nominal vin and full load) graph 9: using on/off voltage start-up and vo rise characteristic (nominal vin and full load) graph 10: transient response to dynamic load change from 100% to 75% to 100% of full load at nominal vin von-of f vout vin vout
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 8 of 14 test setup: the LANC2415DW8 specificati ons are tested with the following configurations: input reflected-ripple curren t measurement test setup peak-to-peak out put ripple & noise measurement setup output voltage and effici ency measurement setup note: all measurements are taken at the module terminals component value voltage reference l 12h ---- ---- c 47f 100v aluminum electrolytic capacitor figure 7 figure 8 figure 10 % 100 ? ? ? ? ? ? = iin vin iout vout efficiency figure 9
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 9 of 14 emc considerations suggested schematic for en55022 conduc ted emission class a limits recommended layout with input filter to meet conducted emissions en55022 cla ss a needed the following components: lanc12xxdw8 component value voltage reference c1 4.7uf 25v 1210 mlcc c2, c3 1000pf 2kv 1206 mlcc lanc24xxdw8 component value voltage reference c1 n/a --- --- c2, c3 1000pf 2kv 1206 mlcc lanc48xxdw8 component value voltage reference c1 n/a --- --- c2, c3 1000pf 2kv 1206 mlcc figure 11 figure 12
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 10 of 14 emc considerations (continued) suggested schematic for en55022 conduc ted emission class b limits recommended layout with input filter to meet conducted emissions en55022 cla ss b needed the following components: lanc12xxdw8 component value voltage reference c1 4.7f 50v 1812 mlcc c3, c4 1000pf 2kv 1206 mlcc l1 325h ---- common chok e, p/n: pmt-050 lanc24xxdw8 component value voltage reference c1 6.8f 50v 1812 mlcc c3, c4 1000pf 2kv 1206 mlcc l1 325h ---- common chok e, p/n: pmt-050 lanc48xxdw8 component value voltage reference c1, c2 2.2f 100v 1812 mlcc c3, c4 1000pf 2kv 1206 mlcc l1 325h ---- common chok e, p/n: pmt-050 figure 13 figure 14
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 11 of 14 recommended pad layout for dip type recommended pad layout for smt type figure 15 1. all dimensions in inches (mm) 2. pin pitch tolerance 0.35mm 3. tolerance: x.xx0.02 (x.x0.5) x.xxx0.01 (x.xx0.25) figure 16
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 12 of 14 soldering and reflow considerations: lead free wave solder profile for dip type lead free reflow profile for smt type zone reference parameter rise temp. speed: 3 /sec max. preheat zone preheat temp: 100~130 peak temp: 250~260 actual heating peak time (t1+t2 time): 4~6 sec zone reference parameter rise temp. speed: 1~3 /sec preheat time: 60~120sec preheat zone preheat temp.155~185 rise temp. speed: 1~3 /sec melting time: 30~60 sec melting temp: 217c peak temp: 230~240 actual heating peak time: 10~20 sec cooling rise temp. speed: -1~ -5 /sec figure 17 figure 18 temperature (c) time (sec) reference solder: sn-ag-cu; sn-cu hand welding: soldering iron: power 90w welding time: 2~4 sec temp: 380~400c temperature (c) time (sec) reference solder: sn-ag-cu; sn-cu
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 13 of 14 packaging information: dip type smt type safety and installation instruction: fusing consideration caution: this power module is not internally fu sed. an input line fuse must always be used. this encapsulated power module can be used in a wide va riety of applications, ranging from simple stand-alone operation to an integrated part of so phisticated power architecture. to maxi mum flexibility, internal fusing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. the safety agencies require a normal-blow fuse with maximum rating of 3a. based on the informa tion provided in this data sheet on inrush energy and maximum dc input current; the same type of fu se with lower rating can be used. refer to the fuse manufacturer?s data for further information. mtbf and reliability the mtbf of the lancw8 dual output series of dc/dc converters has been calculated using bellcore tr-nwt-000332 case i: 50% stress , operating temperature at 40c (ground fixed and controlled environment). the resulting figure for mtbf is 3.053 10 6 hours. mil-hdbk 217f notice2 full load, operating temperat ure at 25c. the resulting figure for mtbf is 1.878 10 6 hours. figure 19 figure 20 16 pcs per tube 16 pcs per tube
technical datasheet LANC2415DW8 (888) 597-wall www.wallindustries.com page 14 of 14 ordering information: part number example: lanc 24 15 d w 8 - s company information: wall industries, inc. has created custom and modified units for over 40 years. our in-house research and development engineers will provide a solution that ex ceeds your performance requirements on-time and on budget. our iso9001-2000 certification is just one example of our commitment to producing a high quality, well documented product for our customers. our past projects demonstrate our co mmitment to you, our customer. wall indus tries, inc. has a reputation for working closely with its customers to ensure each solution meets or exceeds form, fit and function requirements. we will continue to provide ongoing support for your project above and beyond the design and production phases. give us a call today to discuss your future projects. contact wall industries for further information: phone: (603)778-2300 toll free: (888)587-9255 fax: (603)778-9797 e-mail: sales@wallindustries.com web: www.wallindustries.com address: 5 watson brook rd. exeter, nh 03833 series designation nominal input voltage nominal output voltage maximum output power option description no suffix dip type s smt type 2:1 wide input voltage range dual output

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