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bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 1 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. features ? isolated ? output over-voltage shutdown ? high efficiency ? output voltage trim ? high power density ? ocp/scp ? fixed frequency (260 khz) ? over temperature protection ? low cost ? remote on/off ? input under-voltage lockout ? positive/negative remote sense ? input over-voltage lockout ? basic insulation ? class 1, category 2, isolated dc/dc converter (refer to ipc-9592) ? ul60950-1 recognized (ul/cul) (pending) applications ? networking ? computers and peripherals ? telecommunications description the 0RCY-65U03x is part of the isolated dc/dc converters that operates from a wide input range (18 vdc - 75 vdc) and can cover both 24 vin and 48 vin input range. these units will provide up to 66 w of output power. they are designed to be highly efficient and low cost. features include remote on/off, over current protection, over voltage shut down, over temperature protection and under-voltage lockout. these converters are provided in an industry standard 1/8 brick package. part selection output voltage input voltage max. output current max. output power typical efficiency model number active high model number active low 3.3 vdc 18 vdc - 75 vdc 20 a 66 w 90% 0RCY-65U033 0RCY-65U03l notes: add ?g? suffix at the end of the model number to indicate tray packaging. part number explanation 0 r cy ? 65 u 03 x 1 2 3 4 5 6 7 1---through hole 2---rohs 6, change ?r? to ?7? means rohs 5 3---series name 4---series code 5---input range (18-75v) 6---output voltage 3.3v 7--- option, ?x? of the model part number to be 0-9, a-z, which will represent the special request of customer. 0RCY-65U03x rohs com p liant rev.f
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 2 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. absolute maximum ratings parameter min typ max unit notes continuous input voltage -0.3 - 80 v input transient voltage - - 100 v 100 ms maximum remote on/off -0.3 - 18 v i/o isolation voltage - - 1500 v ambient temperature -40 - 85 c storage temperature -55 - 125 c note: ratings used beyond the maximum ratings may caus e a reliability degradation of the converter or may permanently damage the device. input specifications parameter min typ max unit notes operating input voltage 18 24/48 75 v input current (full load) - 4.3 5.0 a input current (no load) - 65 100 ma remote off input current - 10 15 ma input reflected ripple current (rms) - 7 10 ma input reflected ripple current (pk-pk) - 30 50 ma tested with simulated source impedance of 10 uh, 5 hz to 20 mhz; use a 100 uf/100 v electrolytic capacitor with esr = 1 ohm max. at 200 khz at 25 c. i 2 t inrush current transient - 0.05 0.1 a 2 s turn-on voltage threshold 16 16.8 17.5 v turn-off voltage threshold 15 15.8 16.5 v input over voltage lockout 76 78 80 v caution: this converter is not internally fused. an input line fuse must be used in application. recommend a fast-acting fuse with maximum rating of 8a on system board. refer to the fuse manufacture?s datasheet for further information. notes: 1. this converter has internal c-l-c (0.47uf-1.0uh-0.47uf+2.2uf) filter. 2. for recommended external input filter, please refer to safety section. 3. all specifications are typical at 25 c unless otherwise stated. output specifications parameter min typ max unit notes output voltage set point 3.234 3.3 3.366 v vin=48v, io=50% load load regulation - 3.3 10 mv line regulation - 3.3 10 mv regulation over temperature (-40deg.c-85deg.c) - 10 33 mv ripple and noise (pk-pk) - 50 80 mv ripple and noise (rms) - 15 25 mv 0-20 mhz bw, with a 1f ceramic capacitor and a 10uf tantalum cap at output. ripple and noise (pk-pk) under worst case - - 150 mv over all operating input voltage, load and temperature conditions.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 3 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. output specifications (continued) parameter min typ max unit notes output current range 0 - 20 a output dc current limit 23 - 35 a short circuit surge transient - 3 5 a 2 s rise time - 5 - ms 10 15 30 ms ton(enable form vin) turn on time 10 20 30 ms ton(enable form on/off) overshoot at turn on - 0 3 % output capacitance 0 - 4800 uf transient response overshoot - 150 250 mv v50%~75% of max load settling time - 200 350 us overshoot - 150 250 mv v75%~50% of max load settling time - 200 350 us di/dt=0.1a/us, vin=48vdc, ta=25c, with a 1f ceramic capacitor and a 10uf tantalum cap at the output. note: all specifications are typical at nominal inpu t, full load at 25c unless otherwise stated. general specifications parameter min typ max unit notes 88 90 - % vin=48v, full load efficiency 86 88 - % vin=24v, full load switching frequency 240 260 280 khz output voltage trim range 90 - 110 %vo this voltage is achieved by trimming up output slowly over temperature protection - 125 - c over voltage protection(static) - 4.1 - v weight - 40 - g fit tbd - calculated per bell core sr-332 (vin=48 v, vo=3.3 v, io=16 a, t a = 25 c, fit=10 9 /mtbf) dimensions inches (l w h) millimeters (l w h) 2.30 x 0.90 x 0.50 58.42 x 22.76 x 12.72 - isolation characteristics input to output - - 1500 v input to case - - 1500 v output to case - - 500 v isolation resistance 10m - ohm isolation capacitance - 1500 - pf note : all specifications are typical at 25 c unless otherwise stated.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 4 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. efficiency data efficiency curve 70.00% 75.00% 80.00% 85.00% 90.00% 95.00% 3 6 9 12 15 18 20.0 output current (a) efficiency 18v 24v 48v 60v 75v thermal derating curves maximum junction temperature of semiconductors derated to 120 degree c. derating curve under 18v input derating curve under 75v input
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 5 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. thermal derating curves (continued) temperature reference points on top side temperature reference points on bottom side
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 6 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. ripple and noise waveform . 24 vdc input, 3.3vdc/20a output 48 vdc input, 3.3vdc/20a output note: ripple and noise at full load, ta=25c, with a 1f ceramic capacitor and a 10uf tantalum cap at the output. transient response waveforms 50%-75%-50% load transients at vin=24v 50%-75%-50% load transients at vin=48v note: transient response at di/dt=0.1a/us, ta=25c, with 1uf ceramic cap and 10uf tantalum cap at output.
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 7 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. startup & shutdown rise time vout= 3.3v full load at vin=24v@ta=25 vout= 3.3v full load at vin=48v@ta=25 startup time startup from vin startup from on/off ch1: vo, ch3: vin ch1: vo, ch3: on/off vout= 3.3v full load at vin=24v@ta=25 vout= 3.3v full load at vin=24v@ta=25
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 8 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. startup & shutdown (continued) startup time (continued) startup from vin startup from on/off ch1: vo, ch3: vin ch1: vo, ch3: on/off vout= 3.3v full load at vin=48v@ta=25 vout= 3.3v full load at vin=48v@ta=25 shutdown vout= 3.3v full load at vin=24v@ta=25 vout= 3.3v full load at vin=48v@ta=25
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 9 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. remote on/off parameter min typ max unit notes signal low (unit on) -0.3 - 0.8 v signal high (unit off) active low 2.4 - 18 v 0RCY-65U03l. the remote on/off pin open, unit off. signal low (unit off) -0.3 - 0.8 v signal high (unit on) active high 2.4 - 18 v 0RCY-65U033. the remote on/off pin open, unit on. current sink 0 - 0.75 ma recommended remote on/off circuit for active low control with open collector/drain circuit control with photocoupler circuit control with logic circuit permanently on recommended remote on/off circuit for active high control with open collector/drain circuit control with photocoupler circuit control with logic circuit permanently on vin+ vin- on/off vin+ vin- on/off vin+ vin- on/off vcc vin+ vin- on/off vin+ vin- on/off vin+ vin- on/off vin+ vin- on/off vcc vin+ vin- on/off
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 10 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. output trim equations equations for calculating the trim resistor are shown below. the trim down resistor should be connected between the trim pin and sense (-) pin. the trim up resistor should be connected between the trim pin and the sense (+). only one of the resistors should be used for any given application. minimum trim down voltage is 2.97v maximum trim up voltage is 3.63v. the total voltage increased by trim and remote sense should not exceed 5% of the nominal output voltage. note: vo_req=desired (trimmed) output voltage [v] output voltage vo=3.3 v () [] % 100 _ ? = vo vo req vo delta [] ? = k delta rtrimdown 22 . 10 511 [] ? ? ? ? ? + = k delta vo delta rtrimup 22 . 10 225 . 1 626 11 . 5 ) 100 ( module sense(+) trim sense(-) rtrimdo wn module sense(+) trim sense(-) rtrimup 2.64 2.71 2.77 2.84 2.9 2.97 3.04 3.1 3.17 3.23 3.3 0 30 60 90 120 150 180 210 240 270 300 adjusted output voltage vo,adj (v) trim resistor value rtrim_down(kohm) 3.3 3.33 3.37 3.4 3.43 3.46 3.5 3.53 3.56 3.6 3.63 0 150 300 450 600 750 900 1050 1200 1350 1500 adjusted output voltage vo,adj(v) trim resistor value,rtrim_up(kohm)
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 11 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. remote sense this module has remote sense compensation feature. it can minimize the effects of resistance between module?s output and load in system layout and facilitates accurate voltage regulation at load terminals or other selected point. 1. the remote sense lines carries very little current and hence do not require a large cross-sectional area. 2. this module compensates for a maximum drop of 10% of the nominal output voltage. 3. if the unit is already trimmed up, the available remote sense compensation range should be correspondingly reduced. the total voltage increased by trim and remote sense should not exceed 10% of the nominal output voltage. 4. when using remote sense compensation, all the resistance, parasitic inductance and capacitance of the system are incorporated within the feedback loop of this module. it can make an effect on the module's compensation, affecting the stability and dynamic response. a 0.1uf ceramic capacitor can be connected at the point of load to de-couple noise on the sense wires. 5. recommend the connection of remote sense compensation as below figure. there are a resistor rs+ (30.1 ohm) from vo+ to sense+ and a resistor rs- (10.5 ohm)) from vo- to sense- inside of this module. 6. if not using remote sense compensation, please connec t sense directly to output at module's pin, that is, connect sense+ to vo+ and sense- to vo- at module's pin, the shorter the better. see below figure. sense+ sense- rs- vo- vo+ rs+ load sense+ sense- rs- vo- vo+ rs + load
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 12 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. over current protection to provide protection in a fault output overload condition, the module is equipped with internal current-limiting circuitry and can endure current limiting for a few mili-seconds. if the overcurrent condition persists beyond a few milliseconds, the module will shut down into hiccup mode and restart once every 400ms. the module operates normally when the output current goes into specified range. the typical average output current is 5a during hiccup. ch1: output voltage waveform ch4: output current waveform test at: 48vdc input, with a rout (0.022ohm) expansion of on time portion of above figure
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 13 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. over voltage protection the output overvoltage protection consists of circuitry that monitors the voltage on the output terminals. if the voltage on the output terminals exceeds the over voltage protection threshold, the module will shutdown into hiccup mode and restart once every 400ms. the module operates normally when the fault is cleared. note: due to maximum duty cycle limt, output voltage can no t be trimed up to ovp set point in low line input. test setup: r=36k ohm ch1: output voltage waveform sense+ sense- trim r k
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 14 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. over temperature protection the otp is achieved by thermistor rt and the threshold is set at 125c in non-latch mode; the hottest component q1 reaches 125c with 100lfm air flow correspondingly. it will restart automatically when the temperature falls down to 100c. the protecting point will be varied a little under different conditions (air flow, ambient temperature,input voltage, load...). the hottest component on the top side: q1 the thermistor on the bottom side: rt input under-voltage lockout input voltage (v) i npu t c u r r en t voltage falling voltage rising v1 v2 under-voltage lockout v1=16v v2=17v
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 15 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. safety & emc safety 1. material flammability ul94v-0 2. ul certification ul60950-1 emc 1. surge iec61000-4-5 2. dc-dip iec61000-4-29 3. conductive emi en55022 class a compliance to en55022 class a (both q.peak and average) with the following inductive and capacitive filter item designator parameter vendor vendor p/n 1 c1 2.2uf/100v,ceramic murata grf32er72a225ka11l 2 c2 47uf/100v, al cap nichicon uuj2a470mnl1ms 3 c3 100uf/100v, al cap nichicon uvz2a101mpd 4 c4 1000pf/2000v,ceramic johanson 202r18w102kv4e-****-rc 5 c5 1000pf/2000v,ceramic johanson 202r18w102kv4e-****-rc 6 t1 1.3mh, common mode pulse p0402nl conv.positive input conv.negative input c 1 c2 c3 t1 t1 +vin -vin c4 c5
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 16 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. safety & emc (continued) positive: negative:
bel fuse inc. 206 van vorst street, jersey city, nj 07302 ? tel 201-432-0463 ? fax 201-432-9542 ? www.belfuse.com 17 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. mechanical outline note: this module is recommended and compatible with pb-free wave soldering and must be soldered using a peak solder temperature of no more than 26 0 oc for less than 5 seconds. note: 1) all pins: material - copper alloy; finish ? 3 micro inches minimum gold over 50 micro inches minimum nickel plate. 2) undimensioned components are shown for visual reference only. 3) all dimensions in inches (mm); tolerances: x.xx +/-0.0 2 in. (x.x +/-0.5mm) x.xxx +/-0.010 in. (x.xx +/-0.25mm). pin connections pin name function pin dia 1 vin+ positive input voltage 0.040?? 2 on/off input to turn converter on and off, referenced to vin- 0.040?? 3 vin- negative input voltage 0.040?? 4 vout- negative output voltage 0.060?? 5 sense- negative remote sense 0.040?? 6 trim output voltage trim 0.040?? 7 sense+ positive output voltage 0.040?? 8 vout+ positive output voltage 0.060?? note: 1. pin 5 must be connected to vout(-). 2. leave pin 6 open for nominal voltage. 3. pin 7 must be connected to vout(+).
? 2010 bel fuse inc. specifications subject to change without notice. 111610 18 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 isolated dc/dc converters 18 vdc - 75 vdc input 3.3 vdc /20 a output, 1/8 brick nov. 16, 2010 bel power inc., a subsid iary of bel fuse inc. revision history date revision changes detail approval 2008-10-29 a first release. han 2009-12-07 b change to new datasheet format, add ocp, ovp, otp?etc. xf jiang 2010-01-12 c updated outline. xf jiang 2010-03-10 d updated thermal derating curves. xf jiang 2010-03-24 e add thermal derating curves under 18v input and 75v input. xf jiang 2010-11-16 f updated td curve. xf jiang rohs compliance complies with the european directive 2002/95/ec , calling for the elimin ation of lead and other hazardous substances from electronic products.

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