rev:20131220a page 1 of 7 isolated dc - dc converters bob3h3 series -- 3 watt f ea tures wide 2 : 1 input voltage range(9~18v,18~36v,36~75v) re m ote on/off input / output isolation voltage: 3.0kvdc extended operating temperature range: -40c to +85c output short circuit protection: continuous & auto recovery over voltage protection: clamp mode shielded metal case with insulated baseplate lead free design, rohs compliant 24pin dip package with industry-standard footprint customer design available te c hnical specification all specifications are typical at nominal input, full load and 25c unless otherwise stated. output current (ma) input current (ma) model number input voltage range output voltage (v) min. load ( 1) full. load no load full load eff . ( 2 ) (%) capacitive load, max. (3) ( uf) bob3-12s0h3 3.3 2 3 750 14 281 77 820 bob3-12s1h3 5 0 6 00 21 333 79 680 bob3-12s2h3 12 0 2 50 24 325 81 182 bob3-12s3h3 15 0 2 00 25 329 80 100 bob3-12d1h3 5 2 300 21 329 80 330 BOB3-12D2H3 12 0 125 27 325 81 82 bob3-12d3h3 9~18v n o minal:12vdc 15 0 100 35 329 80 47 bob3-24s0h3 3.3 2 3 750 8 138 79 820 bob3-24s1h3 5 0 6 00 10 164 80 680 bob3-24s2h3 12 0 2 50 12 160 82 182 bob3-24s3h3 15 0 2 00 14 162 81 100 bob3-24d1h3 5 2 300 11 164 80 330 bob3-24d2h3 12 0 125 16 160 82 82 bob3-24d3h3 18~36v n o minal:24vdc 15 0 100 17 162 81 47 bob3-48s0h3 3.3 2 3 750 5 71 77 820 bob3-48s1h3 5 0 6 00 7 84 78 680 bob3-48s2h3 12 0 2 50 8 82 80 182 bob3-48s3h3 15 0 2 00 8 82 80 100 bob3-48d1h3 5 2 300 9 83 79 330 bob3-48d2h3 12 0 125 10 82 80 82 bob3-48d3h3 36~75v n o minal:48vdc 15 0 100 12 82 80 47 description the bob3h3 series are isolated 3w dc/dc converters. designed with highly efficiency, allow the operating temperature range of these units to be -40c to +85c in a 24 pin dip package with industry-standard footprint. further features include wide 2 : 1 input voltage range, remote on/off control, short-circuit protection and over voltage protection. applications these converters are well suitable for battery operated equipment, measurement equipment, telecom, wireless network, industry control system, everywhere where isolated, tightly regulated voltages and compact size are required. sales@bothhandusa.com www.bothhandusa.com bothhand usa
rev:20131220a page 2 of 7 isolated dc - dc converters bob3h3 series -- 3 watt input specifications 1 2 v nominal input 9-18v input voltage 2 4 v nominal input 18-36v 4 8 v nominal input 36-75v input filter p i type 1 2 v input 25v input surge voltage 2 4 v input 50v (100ms max.) 4 8 v input 100v input reflected ripple current n o minal vin and full load 86map-p max. start up time n o minal vin and constant resistive load 1020ms max. converter: on o p en or 3.5v vr 12v remote on/off c o nverter: off short (4) or 0v vr 1.2v sourcing current of remote control pin nominal vin 0.2 ma idle input current (at remote off state) nominal vin 2 . 5 ma environmental specifications operating ambient temperature - 4 0c to +85c (with derating ) maximum case temperature + 1 00c storage temperature range - 5 5c to +105c relative humidity 5 % to 95% rh temperature coefficient 0 .02% / c max. output specifications output power 3 watts max. voltage accuracy full load and nominal vin 2% minimum load s e e table line regulation l l to hl at full load 0.5% 25% load to full load single 0 .5% balanced load dual 0 .5% load regulation unbalanced load 25% to 100% full load 3% ripple and noise 20mhz bandwidth 60mvp-p max. 3 . 3vout models 3.9v over voltage protection 5 v out models 6.2v (zener diode clamp) 1 2 vout models 15v 1 5 vout models 18v capacitive load s e e table over load protection % of full load at nominal input 150% typ. short circuit protection c o ntinuous, automatic recovery transient response settling time 50% load step change 1 6 00 s max. transient response over shoot di/dt=0.8a/ s 3% of vo general specifications efficiency no minal input see table sales@bothhandusa.com www.bothhandusa.com bothhand usa
rev:20131220a page 3 of 7 isolated dc - dc converters bob3h3 series -- 3 watt 45 50 55 60 65 70 75 80 85 36 40 44 48 52 56 60 64 68 75 45 50 55 60 65 70 75 80 85 0.06 0.12 0.18 0.24 0.30 0.36 0.42 0.48 0.54 0.60 isolation voltage i n put to output 3000v dc isolation resistance 5 0 0 vdc 10 9 ohms min. isolation capacitance 2 8 0pf typ. switching frequency 3 0 0khz typ. reliability, calculated mtbf 2 . 53 10 6 hrs physical specifications case material n i ckel-coated copper base material n o n-conductive black plastic potting material s i licon rubber (ul94v-0) 1 . 25 0.80 0.40 inch dimensions ( 3 1.75 20.32 10.16 mm) weight 17.2g (0.59oz) typ. bob3h3 series power derating curve(5) ambient temp.ta ( ) bob3-48s1h3 bob3-48s1h3 input voltage vs. efficiency output current vs. efficiency input voltage (v) output current (a) output power (%) efficiency (%) efficiency (%) sales@bothhandusa.com www.bothhandusa.com bothhand usa
rev:20131220a page 4 of 7 isolated dc - dc converters bob3h3 series -- 3 watt b o b3-48s1h3 bob3-48s1h3 transient response at 50%~100% max load loo p gain & phase at vi=48v,full load note 1. io below this value will not damage these converters, however, they may not meet all listed specifications. 2. typical value, tested at nominal input and full load. 3. for each output. 4. short to -vin (pin 2,3). 5. based on bob3-48s1h3. mechanical dimensions sp e cifications subject to change without notice. pin assignment pin single d u al 1 remote on/off remote on/off 2 -vin - v in 3 -vin - v in 9 no pin common 11 no function -vout 14 +vout + v out 16 -vout common 22 +vin + v in 23 +vin + v in unit: mm [inch] t o lerance: 0.5[0.02] sales@bothhandusa.com www.bothhandusa.com bothhand usa
rev:20131220a page 5 of 7 isolated dc - dc converters bob3h3 series -- 3 watt test configurations a l l specifications are typical at nominal input, full load and 25c unless otherwise stated. dc power supply: it offers a wide voltage and current range precisely. current meter (a): accuracy 200a ~ 200ma 4 ranges+ (0.2% rdg + 2 digits) 2 0 00ma ~ 20a 2 ranges+ (0.3% rdg + 2 digits). v o ltage meter (v): accuracy + (0.03% rdg + 4 digits). l o ad: at full load. wires: the resistance of the wires must be small. 1. input voltage range: n arrow input voltage range 10 % wide input voltage range (2:1 and 4:1 ex: narrow input voltage range 10% 5v nominal input 4.5~5.5v 12v nominal input 10.8~13.2v 24v nominal input 21.6~26.4v wide input voltage range 2:1 5v nominal input 4.5~9v 12v nominal input 9~18v 24v nominal input 18~36v 48v nominal input 36~75v wide input voltage range 4:1 (w) 24v nominal input 9~36v 48v nominal input 18~75v 2. i nput power : pin = vin x iin vin inp ut voltage iin input current 3. output power : pout = vout x iout vout out put voltage iout output current 4. efficiency : pout: output power pin : input power 5. voltage accuracy : v o ut output voltage vo ut(nominal) nominal output voltage dc power supply a v load dc/dc converter v a dc power supply a v load dc/dc converter v a v out-vout(nominal) vout x1 00% efficiency = x100% pout p i n sales@bothhandusa.com www.bothhandusa.com bothhand usa
rev:20131220a page 6 of 7 isolated dc - dc converters bob3h3 series -- 3 watt noise ripple ripple & no ise 6. l ine regulation : (1) wide input voltage range and regulated output vol tage series. (2) narrow input voltage range 10 % and unregulated output voltage series. vout(+10%) ou t put voltage at vin = 1.1xvin(nominal)&full load vout(-10%) output voltage at vin = 0.9xvin(nominal)&full load vout output voltage at vin = vin(nominal)&full load vin(+10%) in p ut voltage = 1.1xvin(nominal) vin(-10%) input voltage = 0.9xvin(nominal) vin(nominal) nominal input voltage 7. load regulation : v o ut(fl): output voltage at full load vou t(nl): output voltage at 25% full load or 10% full load 8. ripple and noise : a s shown below. the bandwidth is 0-20mhz. v out(ll)-vout(hl) vout(ll) l l : low line input voltage hl: high line input voltage x100% v out = vout(+10%)-vout(-10%) vout x100% ? vout v in line regulation = v i n(+10%)-vin(-10%) v i n(nominal) ? vin = x100% v out(fl)-vout(nl) v o ut(fl) x100% sales@bothhandusa.com www.bothhandusa.com bothhand usa
rev:20131220a page 7 of 7 isolated dc - dc converters bob3h3 series -- 3 watt o u tput ripple&noise measurement test circuit: as show n below. co: usually 0.47uf. 9. t emperature derating curve : t he dc-dc converter will operate over a wider temperat ure range if less power is drawn from the output and the device is already running. the temperature derating curve shows the operating power-temperature range. as shown below. 10 . switching frequency : t he nominal operating frequency of the dc-dc converter s. 11. i nput to output isolation : t he dielectric breakdown strength test between input a nd output circuits. this is the isolation voltage the device is capable of withstanding for a specified time, usually 1 second or 1 minute. load dc/dc converter oscilloscope copper strip copper strip co load dc/dc converter oscilloscope copper strip copper strip load dc/dc converter oscilloscope copper strip copper strip co output power (%) ambient temp.ta ( ) sales@bothhandusa.com www.bothhandusa.com bothhand usa
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