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b7 0sr 12424a 12v output dc/dc converter, box type package ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 1 features ? w ide input voltage range, 36 ~ 106 v ? 300w output ? full load efficiency up to 89.5 % @48vin ; 90%@72vin ? i ntergrated fuse holder ? p arallel connection of multiple units ? box type package with metal base plate ? package d imension: 1 90.0 x 7 6 .0 x43 . 5 mm (7.48x 2. 99x 1. 71 ) ? operating te mperature r ange - 40c to + 7 5c ? input reverse p olarity protection ? mini mized inrush current ? input uvlo, output oc l , s hort circuit protection, ovp, otp ? enable on/off (option) ? 22 50 vdc isolation ? ip67 protection ? rohs compliant ? i so 9001, iso 14001 certified manufacturing facility ? ul60950 ? ce mark ? emc compatible: en12895 ? electrical transient conduction: iso7637 - 2 the b 7 0 sr 12424a , a wide input voltage range of 36 ~ 106 v , and single isolated output converter, is the latest product of fering from a world leader in power sys tems technology and manufacturing D delta electronics, inc. such box type dcdc converter can provide 300w, 12 .4 v regulated dc output voltage with full load efficiency up to 90 % @ 72 vin ; the b 7 0 sr 12424a offers input uvlo, output over current limit , short cir cuit, output over voltage , over temperature , and input reverse polarity protection s , it has an i ntergrated fuse holder . it also has p arallel function; and allows a wide operating temperature range of C 40c to + 7 5c. with c reative design technology and opti mization of component placement , th is converter possess outstanding electrical and thermal performance, as well as high reliability under extrmely harsh operating conditions. t he b 7 0 sr 12424a meet s ip67 protec t ion (not include the connector and fuseholder) . input characteristics item condition min. typ. max. unit continuous input voltage 36 72 106 vdc max input voltage 10 minut es , normal operating 12 6 vdc input under - voltage lockout, turn - on voltage threshold 33 34 35 vdc input under - voltage loc kout, turn - off voltage threshold 31 32 22 vdc lockout hysteresis voltage 1 2 3 vdc maximum input current vin = 36 v, 100% load 9.2 10 a no - load input current vin=48v 35 60 ma vin=72v, 80v 25 50 ma reflected input ripple current vin= 72 v, vpp 0.2 a max reverse polarity input voltage 106 vdc max inrush current 10 a internal input fuse ? 6.35mm*31.75mm 250v/25 a fast - acting fuse
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 2 output characteristics item conditions min. typ. max. unit operating output current range 0 24 a output vo ltage set point io=0 12. 4 12. 6 12. 8 v io= 24a 1 2.0 12. 2 12 .4 v output voltage ripple and noise, vin=48v, io=24a, peak to peak, 20mhz bandwidth 100 1 50 mv rms 3 0 5 0 mv vin= 72 v, 80v, io= 24 a, peak to peak, 20mhz bandwidth 1 5 0 200 mv rms 5 0 8 0 mv output current limit 25 28 31 a short current vin=48v, auto restart, rms value 3.5 a current share accuracy 24a for each module 6 10 % start - up time 750 1 0 00 ms rise time 130 200 ms output voltage protection 13 15 17 v output voltage current transient positive voltage step , 1 8a to 12a load dynamic, 0.1a/us slew rate 300 500 mv nagetive voltage step , 12a to 18a load dynamic, 0.1a/us slew rate 300 500 mv maximum output capacitance esr>10mohm 5000 f output overshoot 3 % effi ciency @ 100% load vin= 48 v 87.5 8 9.5 % efficiency @ 100 % load vin= 72 v 88.0 90.0 % efficiency @ 100 % load vin= 80 v 88.0 90.0 % efficiency @ 6 0 % load vin= 48 v 88.0 90.0 % efficiency @ 6 0 % load vin= 72 v 88.3 90.3 % efficiency @ 6 0 % load vin= 80 v 88.3 90 .3 % general characteristics item conditions min. typ. max. unit isolation voltage , input to output , input to case 2250 vdc ouput to case 5 50 vdc isolation resistance , input to output 10 m isolation capacitance , input to output 5000 pf switching frequency 175 k hz mtbf ta=25 o c, 80%load 4.3 mhours weight 9 00 g environmental specifications parameter conditions min. max. unit storage temperature range - 40 +125 operatin g temperature range ambient temperature - 40 +75 maximum permitted meta plate temperature vin= 72 v, io= 24 a, refer to figure 20 95 over temperature protection ntc temperature 1 22 humidity (non condensing) 95 % rel. h water protection level w i thout connector&fuseholder ip67 vibration iec 60068 - 2 - 6 10 g/ 15 ~200hz/3 planes shock iec 60068 - 2 - 27 50 g 3 planes emission en12895 30 - 1000mhz 34 - 45dbuv/m immunity en12895 , en61000 - 4 - 3 10v/m /27 - 1000mhz am; 10v/m /900mhz pm esd en12895, en61000 - 4 - 2 dire ct: 2kv 4 kv ; air: 2kv 4 kv 8 kv notes 1 specifications typical at ta=+25 , nominal input voltage and rated full load output current unless otherwise noted. 2 specifications are subject to change without notice.
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 3 electrical curves figure 1 : efficiency vs. output current @ vin= 48 v, 72 v, 80 v figure 2 : loss vs. output current @ vin= 48 v, 72 v, 80 v figure 3 : dynamic response to load step 12a~18a with 0.1a/us slew rate at 72 vin ch1:vout, 2 0 0mv/div, 2 00u s/div figure 4 : vout st art up with vin on at 72 vin ,24a iout, top :v in , 20 v/div, 200m s/div bottom: v out , 5 v/div, 200m s/div figure 5 : output ripple & noise at 72 vi n, 24 a iout ch1:vout, 10 0m v/div, 5u s/div figure 6 : output over voltage protectio n at 72 vin, 2 4 a iout ch1:vout, 1 0 v/div, 5 0m s/div
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 4 electrical curves (continous) figure 7 : input current vs. input voltage @ full load figure 8 : output voltage vs. output current ocl performance figure 9 : o utput voltage vs. output current @vin= 72 v. droop function. figure 10 : current share accuracy vs. total o utput current 2 in parallel. figure 11 : output short current @vin= 72 v ch1: io , 20a /div, 200m s/div figure 12 : in rush current @ vin=72v ch1: iin , 2a /div, 200n s/div ; max current 4.3a, i2t=1.5e - 7 a 2 s
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 5 features description s output over - current limit and short protection the modules include internal output over - current limit (ocl) and short circuit protection (scp) cir cuits , the ocl set point is lower than that of the scp; t he response of scp circuit is much fast than that of the ocl circuit . t he slowly increase of the output curre nt will let module enter ocl protection when the current exceeds the ocl set point, while the fast increase of the output current will let module enter scp when the current exceeds the scp set point. w hen the m odules enter ocl protection, the output voltage will decrease while the output current is ke pt constant, the output voltage will soft s tart to set point when the overload condition is removed. t he module will enter hiccup mode when it triggers the scp set point . t he module will try to restart after shutdown. if the overload condition still exists, the module will shut down again. this re start trial will continue until the overload condition is remov ed. output over - voltage protection the power module include s an internal output over - voltage protection (ovp) circuit, which monitors the voltage on the output terminals. if this voltage excee ds the ovp set point, the module will shut down, and then restart after a fixed delay time (hiccup mode) , please refer to figure6 for detail . over - temperature protection the over - temperature protection consists of circuitry that provides protection from thermal damage. if the temperature exceeds the preset temperature threshold the module will shut down,and all components will not exceed their absolute maximum temperature rating s .the module will restart after the temperature is within specification. rem ote on/of f b 7 0sr12424a has an option for enable control. a n additional pin need to added to achieve this function. th is enable pin is designed on the primary side of converter, the converter will turn on when the enable pin connected to vin+, and turn off when the enable pin connected to vin - or floating. delta can change the 4pin connector to a 5pin connector to achieve the enable function, please contact us if you need this function . figure 13 : suggested enable connection input reverse voltage protection the input reverse voltage protection is provided by an diode on the input line, the standoff voltage for the reverse prot ection shall be no less than - 106 v. enable vin+ vin - vo+ vo - b 7 0sr 12424
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 6 design consideration s parallel connection of multiple units two units paralle l operation is verified , please contact delta if more than two units need to be paralleled. w h ile parallel ling multiple units, the impedance of the cable s from unit to junction point of each unit should be within 5 % of each other . figure 1 4 : suggested parallel connection s emc the converter has the internal emi filters and meet the emc standards en 12895 30 - 1000mhz 34 - 45dbuv/m . t he test result is showed as below conditions: vin= 72 v, io= 24 a , 10m measure distance figure 1 5 : test result(vertical) figure 1 6 : test result(horizontal) fuse replacement the module has the intergratted the fuse holder, when the fuse needs to be replaced, it can be taked down in an anticlockwise direction by slotted type screwdrivers . recommended fuse replacement p/n: littlefuse 03140 25 .mxp unit1 unit2 load unit 1 un it2 load
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 7 thermal consideration the following figure shows the location to monitor the temperature of base plate . before customer decides to use this dcdc converter, a thermal evaluation need to be did to make sure the temperature of base plate is lower than that read from below thermal curves (figure1 8 ~ 20 base on different input voltage). figure 1 7 : thermal consideration thermal curve f igure 1 8 : ou tput current vs. base plate temperature @ vin= 48 v aos
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 8 thermal curves f igure 1 9 : output current vs. base plate temperature @ vin= 72 v f igure 20 : output current vs. base plate temperature @ vin= 80 v aos aos
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 9 m echanical drawing mechanical dimensions pin connections pin function description 1 output - 2 output + 3 input - 4 input + ? all dimensions in mm (inches) ? tolerance: x.x 0. 5 (x.xx0.0 2 ) x. xx 0. 25 ( x.xxx0.0 10 ) ? connector: molex mini - fit sr tm header (molex p/n : 428 19 - 421 3 ) physical outline case size : 1 90 .0 x 7 6 .0 x 43 . 5 mm ( 7.48 x 2. 99 x 1 . 71 ) case material : case: pc ; plate: al 6063
ds_ b 7 0 sr 12424 a _ 10 222013 e - mail dcdc @ d elta.com.tw http:// www.deltaww.com/dcdc p 10 part number ing system b 7 0 s r 124 24 a c form factor input voltage number of outputs product series output voltage output current option code option f itting b - box 7 0 C 36 v~ 106 v s C single r C regular 124 C 12.4 v 24 C 24 a with built - in fuse holder enable pin sealed connector & fuse ho lder connect o r kit a yes no no 1xhousing+ 4 terminals b yes no yes c no yes no d no no no model list input voltage range input output eff @ 72 vin 100% load b 7 0 sr12424 ( a \ b \ c \ d) 36 v~ 106 v 1 0 a 12. 4 v 24 a 90.0 % contact : 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: phone: +31 - 20 - 655 - 0967 fax: +31 - 20 - 655 - 0999 email: dcdc@delta - es.com 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 s 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 gran ted by implication or otherwise under any patent or patent rights of delta. delta reserves the right to re vise these specifications at any time, without notice.
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