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datasheet ds_d12s05020_10282008 features ? high efficiency: 93.4% @ 12vin, 5v/20a out ? size: 30.5x15.5x12.0mm (1.20?x0.61?x0.46?) ? wide input range: 4.5v~13.2v ? output voltage programmable from 0.59vdc to 5.0vdc via external resistors ? no minimum load required ? fixed frequency operation ? input uvlo, output ocp, scp, ovp ? remote on/off (positive logic) ? power good function ? parts/assembly comply with rohs ? iso 9001, tl 9000, iso 14001, qs9000, ohsas18001 certified manufacturing facility applications ? data communications ? distributed power architectures ? servers and workstations ? lan/wan applications ? data processing applications options delphi d12s05020 non-isolated point of load dc/dc modules: 4.5v~13.2vin, 0.59v~5.0vout, 20a the delphi d12s05020 series, 4.5v to 13.2v wide input, wide trim, single output, non-isolated point of lo ad (pol) dc/dc converters are the latest offering from a world leader in power systems technology and manufacturing delta electronics, inc. the d12s05020 product family is part of t he second generation, non-isolated point-of-load dc/dc power modules for the data communication applications which cut the module size by almost 50% in most of the cases compared to the first generation nc series pol modules. the d12s05020 product family provides an ultra wide input range to support 5v, 8v, 9.6v, and 12v bus voltage point-of-load applications and it offers 20a of output current in a vertically mounted through-hole miniature package and the output can be resistor trimmed from 0.59vdc to 5.0vdc. it provides a very cost effective, high efficiency, and high density point of load solution. with creative 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.
ds_d12s05020_10282008 2 technical specifications (ambient temperature=25c, minimum airflow=200lfm, nominal v in =12vdc unless otherwise specified.) parameter notes and conditions d12s05020 min. typ. max. units absolute maximum ratings input voltage -0.3 13.2 v operating temperature refer to figure 25 for the measuring point 0 85 c storage temperature -40 125 c input characteristics operating input voltage 4.5 13.2 v input under-voltage lockout turn-on voltage threshold for 5v output the input minimum is 6.5v 4.5 v turn-off voltage threshold 4.0 v maximum input current vin=6.5v, vo=5.0v, io=20a 16.5 a vin=5v, vo=3.3v, io=20a 14.7 a no-load input current vin=12v, vo=5.0v, io=0a 60 ma off converter input current remote off 10 ma output characteristics output voltage adjustment range 0.59 5.0 v output voltage set point with a 0.1% trim resistor -2 +2 %vo total output range over load, line, temperature regulation and set point -3.0 +3.0 %vo output voltage ripple and noise oscon 680uf x2, 5hz to 20mhz bandwidth peak-to-peak full load, 12vin, 5vo 10 20 mvpk-pk output current range 0 20 a output voltage over-shoot at power-on oscon 680uf x2, 0.5% vo output voltage under-shoot at power-off vin=12v, turn off, oscon 680uf x2, 100 mv output dc current-limit inception hiccup mode 30 a over voltage protection hiccup mode 115 % under voltage protection hiccup mode 115 % dynamic characteristics output dynamic load response output step load 10a to 20a, 10a/usec vo=5.0v, 1360f output capacitance 150 mvpk vo=3.3v, 1360f output capacitance 99 mvpk vo=2.5v, 1360f output capacitance 75 mvpk vo=1.5v, 1360f output capacitance 45 mvpk vo=1.2v, 3280f output capacitance 26 mvpk vo=0.9v, 3280f output capacitance 22 mvpk vo=0.59v, 3280f output capacitance 22 mvpk turn-on transient rise time from 10% to 90% of vo 3 5 ms turn on delay (remote on/off) vin=12v, io=min-max. (with 10% of vo) 5 ms minimum output capacitance 1300 5000 f efficiency vo=0.59v vin=12v, io=20a 76.8 % vo=0.9v vin=12v, io=20a 82.1 % vo=1.1v vin=12v, io=20a 83.8 % vo=1.2v vin=12v, io=20a 85.1 % vo=1.5v vin=12v, io=20a 86.6 % vo=2.5v vin=12v, io=20a 89.7 % vo=3.3v vin=12v, io=20a 90.4 % vo=5.0v vin=12v, io=20a 93.4 % feature characteristics switching frequency fixed 600 khz on/off control positive logic (internally pulled high) logic high module on (or leave the pin open) 1.2 v logic low module off 0.8 v power good delay all conditions (within 90% of vo) 6 ms power good signal vo is outside +/-10% of vo, set 0 0.4 v vo is within +/-10% of vo,set 5.0 v general specifications calculated mtbf 25 , 300lfm, 80% load 6.33 mhours weight 8.8 grams
ds_d12s05020_10282008 3 electrical characteristics curves 60 65 70 75 80 85 90 95 100 0 2 4 6 8 10 12 14 16 18 20 load (a) efficiency (%) 60 65 70 75 80 85 90 95 100 0 2 4 6 8 101214161820 load (a) efficiency (%) figure 1: converter efficiency vs. output current (5.0v output voltage, 12v input) figure 2: converter efficiency vs. output current (3.3v output voltage, 12v input) 60 65 70 75 80 85 90 95 100 02468101214161820 load (a) efficiency (%) 60 65 70 75 80 85 90 95 100 02468101214161820 load (a) efficiency (%) figure 3: converter efficiency vs. output current (2.5v output voltage, 12v input) figure 4: converter efficiency vs. output current (1.5v output voltage, 12v input) 60 65 70 75 80 85 90 95 100 0 2 4 6 8 101214161820 load (a) efficiency (%) 60 65 70 75 80 85 90 95 100 02468101214161820 load (a) efficiency (%) figure 5: converter efficiency vs. output current (1.2v output voltage, 12v input) figure 6: converter efficiency vs. output current (0.9v output voltage, 12v input)
ds_d12s05020_10282008 4 electrical characteristics curves (continued) figure 7: output ripple & noise at 12vin, 5.0v/20a out figure 8: output ripple & noise at 12vin, 3.3v/20a out figure 9: output ripple & noise at 12vin, 2.5v/20a out figure 10: output ripple & noise at 12vin, 1.5v/20a out figure 11: output ripple & noise at 12vin, 1.2v/20a out figure 12: output ripple & noise at 12vin, 0.9v/20a out
ds_d12s05020_10282008 5 electrical characteristics curves (continued) figure 13: control turn on at 12vin, 5.0v /20a ch1: enable, ch3: vo, ch2: pg figure 14: control turn on at 12vin, 3.3v /20a ch1: enable, ch3: vo, ch2: pg figure 15: control turn on at 12vin, 2.5v /20a ch1: enable, ch3: vo, ch2: pg figure 16: control turn on at 12vin, 1.5v /20a ch1: enable, ch3: vo, ch2: pg figure 17: control turn on at 12vin, 1.2v /20a ch1: enable, ch3: vo, ch2: pg figure 18: control turn on at 12vin, 0.9v /20a ch1: enable, ch3: vo, ch2: pg
ds_d12s05020_10282008 6 electrical characteristics curves (continued) figure 19: transient response, 5.0v /20a, ch1: vo figure 20: transient response, 3.3v /20a, ch1: vo figure 21: transient response, 2.5v /20a, ch1: vo figure 22: transient response, 1.5v /20a, ch1: vo figure 23: transient response, 1.2v /20a, ch1: vo figure 24: transient response, 0.9v/20a, ch1: vo
ds_d12s05020_10282008 7 features descriptions enable (on/off) the enable (on/off) input allows external circuitry to put the d12s05020 series converter into a low power dissipation (sleep) mode. positive enable is available as standard. with the active high function, the output is guaranteed to turn on if the enable pin is driven above 1.2v. the output will turn off if the enable pin voltage is pulled below 0.8v. the enable input can be driven in a variety of way as shown in figures 25. unit vin vout enable trim gnd gnd figure 25. enable input drive circuit for d12s05020 input under-voltage lockout the input under-voltage lock out prevents the converter from being damaged while operating when the input voltage is too low. the lockout occurs between 4.0v to 4.3v. output capacitance the d12s05020 requires minimum 1300uf output capacitor for stable operation. power good the converter provides an open collector signal called power good. the converter will sink less than 1ua as a logic high and sink at least 1ma as a logic low. a logic low must be less than 0.4v while sinking 1ma. 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. design considerations the d12s05020 series uses a single phase and voltage mode controlled buck topology. the output can be adjusted in the range of 0.59vdc to 5.0vdc by a resistor from trim pin to ground. 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 (below 0.8v). the module will turn on when this pin is floating and the input voltage is higher than the threshold. the converter can protect it self by entering hiccup mode against over current, short circuit, and over voltage condition. safety considerations it is recommended 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.
ds_d12s05020_10282008 8 features descriptions (con.) over-current and short-circuit protection the d12s05020-1 series modules have 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, the module will resume normal operation. an over current condition is detected by measuring the voltage drop across the mosfets. the voltage drop across the mosfet is also a function of the mosfet?s rds(on). rds(on) is affected by temperature, therefore ambient temperature will affect the current limit inception point. 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 stop all pwm outputs, turn on low-side mosfet and pull low the pgood signal to prevent any damage to load. paralleling d12s05020-1 series converters do not have built-in current sharing (paralleling) ability. hence, paralleling of multiple d12s05020-1 series converters is not recommended. output voltage programming the output voltage of the d12s05020-1 series is adjusted by connecting an external resistor between the trim pin and output ground as shown figure 27and the typical trim resistor values are shown in table 1. unit vin vout enable trim(+) gnd gnd rtrim figure 27: trimming output voltage the d12s05020 series module has a trim range of 0.59v to 5.0v. the trim resistor equation for the d12s05020 series is: 59 . 0 18 . 1 ) ( ? = vout rtrim vout is the output voltage set point rtrim is the resistance between trim and ground rtrim values should not be less than 240 ? and shall be with 0.1% or better tolerance. output voltage rtrim ( ? ) 0.59v open 0.9 v 3.83k 1.1 v 2.32k 1.2 v 1.94k 1.5 v 1.30k 2.5v 618 3.3v 435 5.0v 267 table 1: typical trim resistor values
ds_d12s05020_10282008 9 thermal curves figure 31: temperature measurement location* the allowed maximum hot spot temper ature is defined at 125 d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =5v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 500lfm 100lfm 300lfm 400lfm natural convection figure 32: output current vs. ambient temperature and air velocity @vin=12v, vout=5.0v (worst orientation) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =3.3v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 100lfm 400lfm 200lfm 300lfm natural convection figure 33: output current vs. ambient temperature and air velocity@ vin=12v, vout=3.3v (worst orientation) thermal consideration 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 modul e. 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 delta?s dc/dc power modules are characterized in heated vertical wind tunnels t hat simulate the thermal environments encountered in most electronics equipment. this type of equipment commonly uses vertically mounted circuit card s in cabinet racks in which the power modules are mounted. the following figure shows the wind tunnel characterization setup. the power module is mounted on a test pwb and is vertically positioned within the wind tunnel. the space between the neighboring pwb and the top of the power modul e is constantly kept at 6.35mm (0.25??). 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. note: wind tunnel test setup figure dimensions are in millimeters and (inches) 12.7 (0.5?) module a ir flow 50.8 ( 2.0? ) facing pwb pwb air velocit y and ambien t temperature measured below the module note: wind tunnel test setup figure dimensions are in millimeters and (inches)
ds_d12s05020_10282008 10 thermal curves (d12s05020) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =2.5v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 100lfm 400lfm 200lfm 300lfm natural convection figure 34: output current vs. ambient temperature and air velocity@ vin=12v, vout=2.5v (worst orientation) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =1.8v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 100lfm 400lfm 200lfm 300lfm natural convection figure 35: output current vs. ambient temperature and air velocity @vin=12v, vout=1.8v (worst orientation) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =1.5v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 100lfm 400lfm 200lfm 300lfm natural convection figure 36: output current vs. ambient temperature and air velocity@ vin=12v, vout=1.5v (worst orientation) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =1.2v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 200lfm 600lfm 300lfm 500lfm natural convection figure 37: output current vs. ambient temperature and air velocity@ vin=12v, vout=1.2v (worst orientation) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =1.1v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 100lfm 300lfm natural convection 200lfm figure 38: output current vs. ambient temperature and air velocity @vin=12v, vout=1.1v (worst orientation) d12s05020-1 b output current vs. ambient temperature and air velocity @ vin =12v, vout =0.9v (worse orientation) 0 5 10 15 20 25 25 35 45 55 65 75 85 ambient temperature ( ) output current (a) 100lfm 300lfm natural convection 200lfm figure 39: output current vs. ambient temperature and air velocity @vin=12v, vout=0.9 v (worst orientation)
ds_d12s05020_10282008 11 mechanical drawing pin# function 1 vout 2trim 3gnd 4pg 5 enable 6vin 7 sense+ 8 sense-
ds_d12s05020_10282008 12 d12s05020-1 series model list model name input voltage output voltage output current 5vout ocp typical lead free pin length d12s05020-1 a 4.5v ~ 13.2v 0.59v ~ 5.0v 20a 30a rohs 5 3.50 mm d12s05020-1 b 4.5v ~ 13.2v 0.59v ~ 5.0v 20a 32a rohs 5 3.80 mm d12s05020-1 c 4.5v ~ 13.2v 0.59v ~ 5.0v 20a 30a rohs 6 3.80 mm d12s05020-1 d 4.5v ~ 13.2v 0.59v ~ 5.0v 20a 30a rohs 6 3.50 mm d12s05020-1 e 4.5v ~ 13.2v 0.59v ~ 5.0v 20a 32a rohs 6 3.80 mm contact: www.delta.com.tw/dcdc usa: telephone: east coast: (888) 335 8201 west coast: (888) 335 8208 fax: (978) 656 3964 email: dcdc@delta-corp.com europe: telephone: +41 31 998 53 11 fax: +41 31 998 53 53 email: dcdc@delta-es.tw asia & the rest of world: 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 available 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 pat ent rights of delta. delta reserves the right to revise these specifications at any time, without notice .

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