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data sheet d s _ d12s400_ 1 0152013 features ? high efficiency: 9 4 % @ 12vin, 5.0v/ 8 0a out ? wide input range: 10.8 v~1 3.2 v ? output voltage programmable from 0. 8375 vdc to 5.0 vdc via external resistors ? no minimum load required ? fixed frequency operation ? input uvlo , output ocp , ovp , otp . ? remote on/off (positive logic) ? power good function ? rohs 6/6 compliant ? iso 900 1 , tl 9000, iso 14001 , qs9000, ohsas18001 certified manufacturing facility ? ul/cul 60950 (us & canada) recognized ap plications ? telecom / datacom ? distributed power architectures ? servers and work stations ? lan / wan applications ? data processing application s delphi d12s400 non - isolated point of load dc/dc modules: 10.8 ~13. 2 vin, 0.8375 ~ 5. 0 v/ 80a output the d12s 4 00 , 10.8 ~13. 2v wide input, single output , non - isolated point of load dc/dc converter is the latest offering from a world leader in power systems technology a nd manufacturing -- delta electronics, inc. the d12s400 and nd/ne product families are part of the second generation, non - isolated point - of - load dc/dc power modules which cut the module size by almost 50% in most of the cases compared to the first generati on nc series pol modules for networking and data communication applications. d12s400 product provides up to 8 0 a in the same form factor of the second generation 60a datacom pols and the output can be resistor trimmed from 0. 8375 vdc to 5.0 vdc. it provides a highly efficient, high power and current density and very cost effective point of load solution. with c reative design technology and optimization of component placement , these converters possess outstanding electrical and thermal performance, as well as e xtremely high reliability under highly stressful operating conditions.
ds_d12s400_ 1 0152013 2 technical specificat ions (all data below are tested a t operating ambient temperature 25 c, air flow 300lfm, 5.0vout, unless otherwise stated.) parameter notes and conditions d12s400 min. typ. max. units absolute maximum ratings input voltage continuous - 0.3 13. 8 v operating temperature w ith appr opriate air flow and de - rating as figure 28 0 85 c storage temperature - 40 12 5 c input characteristics operating input voltage vo >1.8 v 10.8 12.0 13.2 v operating input voltage vo Q 1.8 v 5.0 13.2 v input under - voltage lockout turn - on voltage threshold vo Q 3.3v, io=1a 4.8 v turn - off voltage threshold vo Q 3.3v, io=1a 4.5 v lockout hysteresis voltage 0.3 v maximum input current 100%load, 12vin, 5.0vout 38 a no - load input current total input range 750 ma off converter inp ut current remote off , vin=12v 35 ma output characteristics output voltage adjustment range 0.8375 5 . 0 v output voltage set point measured at remote sense pin - 1 .5 +1 .5 %vo output voltage regulation over load io=io_min to io_max - 0. 5 + 0. 5 %vo over line vin=vin_min to vin_max - 0. 5 +0. 5 %vo over temperature tc=0c to 85c - 1 .0 +1 .0 c total output range over load, line, temperature regulation and set point - 3 . 5 + 3 . 5 %vo output voltage ripple and noise 5hz to 20mhz bandwidth pe ak - to - peak full load, 10uf tan cap & 1uf ceramic , total input & output range 50 mv rms full load, 10uf tan cap & 1uf ceramic , total input & output range 20 mv output current range 0 80 a output voltage over - shoot at start - up all conditions 0.5 2 % of vo output voltage under - shoot at power - off vin=12v, turn off 100 mv output dc current - limit inception hiccup mode 135 %iomax dynamic characteristics output dynamic load response without output cap. positive step change in output curr ent 12vin, 5.0vout, 0a to 20a, 10a/us 170 mv negative step change in output current 12vin, 5.0vout, 2 0a to 0a, 10a/us 170 mv settling time settling to be within regulation band (to 10% vo deviation) 20 s turn - on transient start - up time, fro m on/off control from enable high to 90% of vo 5 ms start - up time, from input power from vin=12v to 90% of vo 10 ms power good delay all conditions (within 90% of vo(set)) 2 ms minimum output capacitance 0 f maximum output startup capacitive load esr 1m 0 5000 f minimum input capacitance 2200 f efficiency vo=1.0 v vin=12v, io= 80 a 85.0 % vo= 1.2 v vin=12v, io= 80 a 86.0 % vo=1.5 v vin=12v, io= 80 a 88.5 % vo=1.8 v vin=12v, io= 80 a 89.5 % vo=2.5 v vin=12v, io= 80 a 91.5 % vo=3. 3 v vin=12v, io= 80 a 92.5 % vo=5.0 v vin=12v, io= 80 a 94.0 % feature characteristics switching frequency f ixed , per phase 5 00 khz on/off control positive logic (internally pulled high ) logic high module on (or leave the pin open) 4.5 5.5 v logic low module off - 0.3 0.5 v general specifications calculated mtbf 12vin, 5.0vout, full load, 55 , 400lfm 1.0 m hours 12vin, 5.0vout, full load, 25 , 400lfm 1.4 m hours weight 35.0 grams over - temperature shutdown refer to figure 28 for the measuring point 125 c
ds_d12s400_ 1 0152013 3 electrical character istics curves figure 1: converter efficiency vs. output current ( 1.2 v output voltage) figure 2: converter efficiency vs. output current ( 1. 5 v output voltage) figure 3: converter efficiency vs. output current ( 1.8 v output voltage) figure 4: converter efficiency vs. output current ( 2.5 v output voltage) figure 5 : c onverter efficiency vs. output current ( 3.3 v output voltage) figure 6 : converter efficiency vs. out p ut current ( 5.0 v output voltage) note: remove the 5v input applica tions . effciency 70 75 80 85 90 95 10 20 30 40 50 60 70 80 output current (a) effciency (%) 5v 12v 13.2v effciency 60 65 70 75 80 85 90 95 10 20 30 40 50 60 70 80 output current (a) effciency (%) 5v 12v 13.2v effciency 65 70 75 80 85 90 95 10 20 30 40 50 60 70 80 output current (a) effciency (%) 5v 12v 13.2v effciency 75 80 85 90 95 100 10 20 30 40 50 60 70 80 output current (a) effciency (%) 5v 12v 13.2v effciency 65 70 75 80 85 90 95 10 20 30 40 50 60 70 80 output current (a) effciency (%) 5.0v 12v 13.2v effciency 75 80 85 90 95 100 10 20 30 40 50 60 70 80 output current (a) effciency (%) 7.5v 12v 13.2v
ds_d12s400_ 1 0152013 4 electrical character istics curves (conti nued) figure 7 : output ripple & noise at 12vin, 1.2 v/ 80 a out ( 10 mv/div, 1m s/div) figure 8 : output ripple & noise at 12vin, 1. 5 v/ 80 a out ( 10 mv/div, 1m s/div) figure 9 : output ripple & noise at 12vin, 1 . 8 v/ 80 a out ( 10 mv/div, 1m s/div) figure 10 : output ripple & noise at 12vin, 2.5 v/ 80 a out ( 10 mv/div, 1m s/div) figure 11 : output ripple & noise at 12vin, 3.3 v/ 80 a out ( 10 mv/div, 1m s/div) figure 12 : output ripple & noise at 1 2vin, 5.0 v/ 80 a out ( 10 mv/div, 1m s/div)
ds_d12s400_ 1 0152013 5 electrical character istics curves (continued) figure 13 : control turn on , 1.2 v/ 80 a out ch 1 : vo, ch2:pg, ch3:enable figure 1 4 : control turn on , 1.5 v/ 80 a out ch 1 : vo, ch2:pg, ch3:enable fig ure 1 5 : control turn on , 1.8 v/ 80 a out ch 1 : vo, ch2:pg, ch3:enable figure 1 6 : control turn on , 2. 5 v/ 8 0 a out ch 1 : vo, ch2:pg, ch3:enable figure 1 7 : control turn on , 3.3 v/ 8 0 a out ) ch 1 : vo, ch2:pg, ch3:enable figure 1 8 : control turn on , 5 v/ 8 0 a out ch 1 : vo, ch2:pg, ch3:enable
ds_d12s400_ 1 0152013 6 electrical character istics curves (continued) test condition: slew rate: 10a/us, load step: 25 % of max. load, output without caps. figure 1 9 : typical transient response , 1.2v output ch1: vo, ch4:i o ,10a/div figure 20 : typical transient response , 1.5v output ch1: vo, ch4:io,10a/div figure 21 : typical transient response , 1.8v output ch1: vo, ch4:i o ,10a/div figure 22 : typical transient response , 2.5v output ch1: vo, ch4:io, 10a /div figure 23 : typical transient response , 3.3v output ch1: vo, ch4:io,10a/div figure 24 : typical transient response , 5.0v output ch1: vo, ch4:i o ,10a/div
ds_d12s400_ 1 0152013 7 features description s e nable (on/off) d12s400 has positive on/off logic, pulling the pin low will turn off the unit. with the active high function, the output is guaranteed to turn on if the enable pin is driven above 4 . 5v. the output will turn o ff if the enable pin voltage is pulled below 0. 5 v. t he d12s400 is turned on if the enable pin is floating. the enable input can be driven in a variety of way as shown in figures 25 . figure 25: enable input drive circuit ov er - current and short - circuit protection the d12s400 has non - latching over - current and short circuit protection circuitry. when over current condition occurs, the module goes into the non - latching hiccup mode. when the over - current condition is removed, th e module will resume normal operation. an over current condition is detected by measuring the voltage drop across the rds(on) of low side mosfet. rds(on) is affected by temperature, therefore ambient temperature will affect the current limit inception poi nt. output over voltage protection (ovp) the converter will shut down when an output over voltage protection is detected. once the ovp condition is detected, controller will latch off and can only reset by input voltage or on/off. design consideration s the d12s400 uses a voltage mode controlled b uck topology. the output can be trimmed in the range of 0. 8375 vdc to 5.0 vdc by an external resistor from trim (+) pin to trim ( - ) . the converter can be turned on/off by remote control with positive on/off ( enable pin ) logic . the converter dc output is disabled when the signal is driven low . when this pin is floating the module will turn on. the converter can protect itself by entering hiccup mode against over current and short circuit condition. also, the converter will shut down when an over voltage protectio n is detected. safety considerations it is recommend ed that the user to provide a very fast - acting type fuse in the input line for safety . the output voltage set point and the output current in the application could define the amperage rating of the fuse . unit vin vout enable trim gnd gnd
ds_d12s400_ 1 0152013 8 features description s (cont.) output voltage programming the output voltage of the d12s400 is trim m able by connecting an external resistor between the trim (+) and trim( - ) pins as shown in figure 26 and the typical trim resistor values are shown in table 1 . figure 26 : trimming output voltage the d12s400 module has a trim range of 0. 8375 v to 5.0 v. the trim resistor equation for the d12s400 is: vout is the output voltage set point rtrim is the resistance between trim(+) and trim( - ) rtrim values should not be less than 36 0 output voltage rtrim () 0.8375 v open +1. 0 v 10.3 k +1. 2v 4.631 k + 1.5 v 2.528 k + 1.8 v 1.74k + 2.5 v 1.008k + 3.3 v 680 + 5.0 v 402 table 1 : typical trim resistor values power good the co nverter provides an open collector signal called power good. this output pin uses positive logic and is open - drain . this power good output is able to sink 4ma . the power good signal is pulled low when an input under voltage, output over voltage , or output over current conditions is detected or when the converter is disabled by enable pin . paralleling d12s 4 00 converters do not have built - in current sharing (paralleling) ability. hence, paralleling of multiple d12s400 converters are not recommended. outp ut capacitance there is output capacitor on the d12s 4 00 . hence , no external output capacitor is required for stable operation. reflected ripple current and output ripple and noise measurement the measurement set - up outlined in figure 27 has been used fo r both input reflected/ terminal ripple current and output voltage ripple and noise measurements on d12s 4 00 converters. cs=330 f o s - con cap x 1, ltest= 1 h, cin= 33 0 f o s - con cap x 1, figure 27 : input reflected ripple/ capacitor ripple current and output voltage ripple and noise measurement setup for d12s 4 00 unit vin vout enable trim (+) gnd trim ( - ) rtrim 8375 . 0 675 . 1 ) ( ? ? ? vout rtrim dc - dc converter 1 u f ceramic tan 1 0 u f vin+ load ltest cs cin output voltage ripple noise measurement point input reflected current measurement point
ds_d12s400_ 1 0152013 9 t hermal curves (vertical version) figure 29: output current vs. ambient temperature and air velocity @vi n=12v, vout=1.0 v (worst orientation) figure 30: output current vs. ambient temperature and air velocity @vin=12v, vout=1. 2v (worst orientation) figure 3 1: output current vs. ambient temperature and air velocity@ vin=12v, vout=1.5v ( worst orientatio n) 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 usuall y 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 de - rating heat can be removed by increasing airflow over the module. the modules maximum hot spot temperature is defined at 125 . 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. therma l curves (vertical version ) figure 28: hot spot temperature measured point the allowed maximum hot spot temperature is defined at 125 . d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =1v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =1.2v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =1.5v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm
ds_d12s400_ 1 0152013 10 t hermal curves (vertical version) figure 32: output current vs. ambient temperature and air velocity@ vin= 12 v, vout= 1. 8v ( worst orientation) figure 3 3: output current vs. ambient temperature and air velocity @vin=12v, vout=2.5 v (worst orientation) figure 34: output current vs. ambient temperature and air velocity@ vin= 12 v, vout=3.3v ( worst orientation) figure 35 : output current vs. ambient temperature and air velocity @vin=12v, vout=5.0 v (worst orientation) d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =1.8v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =2.5v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =3.3v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm d12s400 series output current vs. ambient temperature and air velocity @ vin =12v, vout =5v (worse orientation) 0 10 20 30 40 50 60 70 80 90 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 100lfm 300lfm 500lfm natural convection 400lfm
ds_d12s400_ 1 0152013 11 mechanical drawing * a ll pins are coppe r with mate tin
ds_d12s400_ 1 0152013 12 part numbering syste m d 12 s 400 a type of product input voltage number of outputs product series option code d - dc/dc modules 12 - 10.8 ~13.2v s - single 400 - 400w (80a, wide output trim) a - rohs 6/6 lead free, positive on/off logic, 3.5 6 mm pin length , vertical b - rohs 6/6 lead free, positive on/off logic, 6.3 5 mm pin length , vertical model list model name input voltage output voltage output current pin length rohs 6/6 complaint efficiency 12vin, 5 vout @ 100% load d12s400 a 10.8 ~ 13. 2 vdc 0. 8375 v ~ 5.0v 80 a 3.5mm (0.14") yes 94.0% d12s400 b 10.8 ~ 13. 2 vdc 0. 8375 v ~ 5.0v 80 a 6.3mm (0.25") yes 94.0% contact: www.deltaww.com/dcdc usa: telephone: east coast: 978 - 656 - 3993 west coa st: 510 - 668 - 5100 fax: (978) 656 3964 email: dcdc@delta - corp.com europe: telephone: +31 - 20 - 655 - 0967 fax: +31 - 20 - 655 - 0999 email: dcdc@delta - es. com asia & the rest of wor ld : telephone: +886 3 4526107 ext. 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 avai lable upon request from delta. information furnished by delta is believed to be accurate and reliable. however, no responsibility is assumed by delta for its 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 specifications at any time, without notice .

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