bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converter 9.0 vdc - 34 vdc input 10 vdc - 12 vdc/3.5 a output ? non-isolated ? remote sense ? fixed frequency (340 khz) ? low profile package (8.5mm) ? over current protection ? remote on/off (active low) ? scp description the SRDB-04HX20 is part of the low cost non-isolated dc/dc converter. the module uses a dip package for ease of layout and space savings, with a low profile of 8.5 mm. the output is closely regulated and the efficiency of 12 v is typically 86% at full load. features include remote sense, over current protection and remote on/off. part selection output voltage input voltage max. output current max. output power typical efficiency model number 10 v - 12 v 9.0 v - 34 v 3.5 a 42 w 86% SRDB-04HX20 notes: 1. add ?r? suffix at the end of the model number to indicate ?reel packaging?, and ?g? for ?tray packaging?. 2. all part numbers above indicate rohs 6. change the second letter "r" to "7" for rohs 5 part numbers. absolute maximum ratings parameter min typ max notes input voltage (continuous) -0.3 v - 36 v output enable voltage -0.3 v - 12 v ambient temperature -40 c - 85 c storage temperature -55 c - 125 c input specifications parameter min typ max notes input voltage 9 v 20 v 34 v input current (full load) - - 5.6 a input current (no load) - 50 ma 100 ma remote off input current - 1 ma 3 ma input reflected ripple current (pk-pk) - 500 ma 750 ma input reflected ripple current (rms) - 170 ma 250 ma tested with simulated source impedance of 500 nh, 5 hz to 20 mhz; and two 100 uf/50 v electrolytic capacitors and a 3.3 uf/50 v ceramic capacitor at the input. i 2 t inrush current transient - 0.05 a 2 s 0.1 a 2 s turn-on voltage threshold - 8.5 v 9.0 v note: all specifications are typical at 25 c unless otherwise stated. SRDB-04HX20 rohs com p liant rev.a
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converter 9.0 vdc - 34 vdc input 10 vdc - 12 vdc/3.5 a output output specifications parameter min typ max notes output voltage set point 11.89 v 12.13 v 12.37 v vin=20 v, lout=50% full load line regulation - 12 mv 24 mv load regulation - 12 mv 24 mv regulation over temperature (-40 c to 85 c) - 30 mv 50 mv ripple and noise (rms) - 2.5 mv 5 mv ripple and noise (pk-pk) - 10 mv 20 mv test conditions: 0-20 mhz bw; with 33 uf-0.5 uh-33 uf second stage filter. output current 0 a - 3.5 a output current limit threshold 4 a - 7 a short circuit surge transient - 0.2 a 2 s 0.5 a 2 s turn on time - 3.5 ms 10 ms overshoot at turn on - 2% 5% output capacitance 0 uf 220 uf transient response overshoot - 220 mv 250 mv 50% ~ 100% max load settling time - 300 us 500 us overshoot - 130 mv 250 mv 100% ~ 50% max load settling time - 300 us 500 us tested at di/dt=0.5 a/us, vin=20 v, with 33uf-0.5 uh- 33 uf second stage filter. note: all specifications are typical at 20 v input, full load at 25 c unless otherwise stated. general specifications parameter min typ max notes efficiency 83% 86% - vin=20 v, full load switching frequency 310 khz 340 khz 370 khz output voltage trim range 80%vo - 105%vo remote sense compensation - - 5% mtbf 5,373,282 hours calculated per bell core sr-332 (i o = 2 a, vo=12 v, vin=20 v; t a = 25 c) dimensions inches millimeters 1.22 x 0.827 x 0.345 30.99 x 21.00 x 8.76 weight - 11 g - note : all specifications are typical at nominal input, full load at 25 c unless otherwise stated. control specifications parameter min typ max notes remote on/off signal low (unit on) -0.3 v - 1 v signal high (unit off) 2.8 v - 12 v remote on/off pin open, unit on.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converter 9.0 vdc - 34 vdc input 10 vdc - 12 vdc/3.5 a output output trim equations equations for calculating the trim resistor (in k ? ) given the desired adjusted voltage (vadj) and the nominal output voltage of the converter (vnom) are shown below. the trim down resistor should be connected between the trim pin and vout. the trim up resistor should be connected between the trim pin and ground. only one of the resistors should be used for any given application. 66 . 8 408 . 83 ? ? = adj nom trimdown v v r nom adj trimup v v r ? = 65 . 21 note: the output voltage v nom = 12.13 v. efficiency data efficiency curve 70.0% 72.0% 74.0% 76.0% 78.0% 80.0% 82.0% 84.0% 86.0% 88.0% 90.0% 0.5 1.0 1.5 2.0 2.5 3.0 3.5 output current (a) efficiency 9.0 v 20.0 v 32.0 v module vout trim gnd rtrimup module vout trim gnd rtrimdown
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converter 9.0 vdc - 34 vdc input 10 vdc - 12 vdc/3.5 a output thermal derating curve note : derating curve is for 12 v output and tested at nominal input voltage. ripple and noise waveform note: ripple and noise at max load, 0-20 mhz bw, 20 v input, 12 v output, ta=25 deg c.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com non-isolated dc/dc converter 9.0 vdc - 34 vdc input 10 vdc - 12 vdc/3.5 a output transient response waveforms transients 2 a to 1 a, 20 v input, 12.0 v output transients 1 a to 2 a, 20 v input, 12.0 v output note: transient response at di/dt=0.5 a/us, ta=25 deg c.
? 2007 bel fuse inc. specifications subject to change without notice. 031907 corporate far east europe bel fuse inc. bel fuse ltd. bel fuse europe ltd. 206 van vorst street 8f/ 8 luk hop street preston technology management centre jersey city, nj 07302 san po kong marsh lane, suite g7, preston tel 201-432-0463 kowloon, hong kong lancashire, pr1 8ud, u.k. fax 201-432-9542 tel 852-2328-5515 tel 44-1772-556601 www.belfuse.com fax 852-2352-3706 fax 44-1772-888366 www.belfuse.com www.belfuse.com non-isolated dc/dc converters 9.0 vdc - 34 vdc input 10 vdc - 12 vdc/3.5 a output mechanical outline rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products. these parts are not however compatible with the higher temperatures associated with lead free solder processes and must be soldered using a reflow profile with a peak temperature of no more than 240 oc. pin connections pin function 1 trim 2 remote on/off 3 remote sense 4 vo 5 vo 6 vo 7 ground 8 ground 9 ground 10 n/a (leave this pin unconnected) 11 vin 12 vin
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