wra wra wra wra wra wra wra wra - - - - - - - - zd- zd- zd- zd- zd- zd- zd- zd- 8 8 8 8 8 8 8 8 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zd zd zd zd zd zd zd zd - - - - - - - - 8 8 8 8 8 8 8 8 w w w w w w w w series series order code input voltage range output voltage output current max. efficiency typ. wrb2403zd-8w 9 C 36 vdc 3.3 vdc 2400 ma 85 % wrb2403zd-8w 9 C 36 vdc 5 vdc 1600 ma 87 % wrb2412zd-8w 9 C 36 vdc 12 vdc 666 ma 86 % wrb2415zd-8w 9 C 36 vdc 15 vdc 533 ma 86 % wra2405zd-8w 9 C 36 vdc 5 vdc 800 ma 84 % wra2412zd-8w 9 C 36 vdc 12 vdc 333 ma 86 % wra2415zd-8w 9 C 36 vdc 15 vdc 267 ma 86 % wrb4803zd-8w 18 C 75 vdc 3.3 vdc 2400 ma 85 % wrb4805zd-8w 18 C 75 vdc 5 vdc 1600 ma 87 % wrb4812zd-8w 18 C 75 vdc 12 vdc 666 ma 87 % wrb4815zd-8w 18 C 75 vdc 15 vdc 533 ma 88 % wra4805zd-8w 18 C 75 vdc 5 vdc 800 ma 84 % wra4812zd-8w 18 C 75 vdc 12 vdc 333 ma 87 % wra4815zd-8w 18 C 75 vdc 15 vdc 267 ma 87 % wrb7203zd-8w 43 C 160 vdc 3.3 vdc 2400 ma 84 % wrb7205zd-8w 43 C 160 vdc 5 vdc 1600 ma 85 % wrb7512zd-8w 43 C 160 vdc 12 vdc 666 ma 86 % wrb7515zd-8w 43 C 160 vdc 15 vdc 533 ma 86 % wra7205zd-8w 43 C 160 vdc 5 vdc 800 ma 82 % wra7212zd-8w 43 C 160 vdc 12 vdc 333 ma 85 % wra7215zd-8w 43 C 160 vdc 15 vdc 267 ma 85 % *input voltage can t exceed this value,or will cause the permanent damag e. 8 8 8 8 w, w, w, w, wide wide wide wide input, input, input, input, isolated isolated isolated isolated & & & & regulated regulated regulated regulated dual/single dual/single dual/single dual/single output output output output dc dc dc dc - - - - dc dc dc dc converter converter converter converter features features features features features features features features wide (4:1) input range dip-24 metal package 1500vdc isolation operating temperature: -40 85 high efficiency up to 88 % remote on/off no minimum load required 3-year product warranty internal smd construction rohs compliance mtbf>1000khours applications applications applications applications applications applications applications applications microdc reserves the copyright model model model model model model model model selection selection selection selection selection selection selection selection wrb wrb wrb wrb wrb wrb wrb wrb 24 24 24 24 24 24 24 24 12 12 12 12 12 12 12 12 z z z z z z z z d d d d d d d d - - - - - - - - 8 8 8 8 8 8 8 8 w w w w w w w w (666) (666) (666) (666) (666) (666) (666) (666) product series input voltage output voltage wide ( 4 :1) input range dip package style rated power http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1/ 4 selection selection selection selection selection selection selection selection guide guide guide guide guide guide guide guide the wra-zd- 8 w wrb-zd- 8 w series is a family of high performance 8 watt dc/dc converter modules featuring ultra wide 4:1 input voltage ranges in a dip-24 package with industry-standard footprint. input voltages up to 160 vdc, excellent emc characteristics and en 50155 approval make this product the best choice for many demanding applications in railroad and transportation systems. further standard features include remote on/off, over voltage protection, under voltage lockout and short circuit protection. typical applications for these converters are also in wireless networks, telecom/datacom, industry control systems and measurement equipments. general general general general general general general general specifications specifications specifications specifications specifications specifications specifications specifications temperature ranges C operating C 40 c to +85 c C case temperature +105 c max. C storage C 55 c to +125 c power derating 3 %/k above +70 c thermal inpedance C natural convection 18.2 c/w C natural convection with heat sink 15.8 c/w humidity (non condensing) 5 C 95 % rel. h max. isolation voltage(60 sec.) C input / output 1500 vdc isolation resistance C input / output >1000 m ohm isolation capacitance C input / output 1500 pf max. switching frequency 300 khz typ. (pulse width modulation pwm) thermal shock, mechanical shock & vibration http://microdc.cn/uploadfiles/wra-zd- 8 w&wrb-zd- 8 w.pdf C test conditions safety standards ul/cul 60950-1, iec/en 60950-1, en 50155 safety approvals C ul/cul remote on/off C on: 3.0 ... 12 vdc or open circuit C off: 0 ... 1.2 vdc or short circuit pin 1 and pin 2/3 C off idle current: 2.5 ma reliability, calculated mtbf(mil-hdbk-217f, at +25 c, ground benign) 1 mio. h environmental C reach C rohs rohs directive 2002/95/ec physical physical physical physical physical physical physical physical specification specification specification specification specification specification specification specification casing material copper, nickel plated baseplate material non conductive fr4 potting material epoxy (ul94v-0 rated) weight 18 g (0.63 oz) soldering temperature max. 265 c / 10 sec.
wra wra wra wra wra wra wra wra - - - - - - - - zd- zd- zd- zd- zd- zd- zd- zd- 8 8 8 8 8 8 8 8 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zd zd zd zd zd zd zd zd - - - - - - - - 8 8 8 8 8 8 8 8 w w w w w w w w series series typical typical typical typical typical typical typical typical characteristics characteristics characteristics characteristics characteristics characteristics characteristics characteristics temperature temperature temperature temperature temperature temperature temperature temperature characteristics characteristics characteristics characteristics characteristics characteristics characteristics characteristics input input input input input input input input specifications specifications specifications specifications specifications specifications specifications specifications input current (no load) 9 C 36 vin, 3.3 vdc & 5 vdc models: 40 ma typ. 9 C 36 vin other models: 25 ma typ. 18 C 75 vin, 3.3 vdc & 5 vdc models: 20 ma typ. 18 C 75 vin other models: 13 ma typ. 43 C 160 vin, 3.3 vdc & 5 vdc models: 8 ma typ. 43 C 160 vin other models: 5 ma typ. input current (full load) 9 C 36 vin models: 410 ma typ 18 C 75 vin models: 210 ma typ 43 C 160 vin models: 90 ma typ. input voltage variation (dv/dt) 5 v/ms, max. (complies with ets300 132 part 4.4) start-up voltage 9 C 36 vin models: 9.0 vdc (or lower) 18 C 75 vin models: 18 vdc (or lower) 43 C 160 vin models: 43 vdc (or lower) under voltage shut down (lock-out circuit) 9 C 36 vin models: 8.0 vdc typ. 18 C 75 vin models: 16 vdc typ. 43 C 160 vin models: 42 vdc typ. surge voltage (100 msec. max.) 9 C 36 vin models: 50 v max. 18 C 75 vin models: 100 v max. 43 C 160 vin models: 170 v max. reflected ripple current 20 map-p typ. conducted noise en 55022 class a with external components see application note: esd (electrostatic discharge) en 61000-4-2, air 8 kv, contact 6 kv,perf. criteria a radiated immunity en 61000-4-3, 20 v/m, perf. criteria a fast transient / surge (with external input capacitor) en 61000-4-4, 2 kv, perf. criteria a en 61000-4-5, 2 kv perf. criteria a C external input capacitor 24/48 vin models: nippon chemi-con ky 220 f, 100 v, esr 48 mohm 110 vin models: nippon chemi-con kx j 150 f, 200 v, esr 48 mohm conducted immunity en 61000-4-6, 10 vrms, perf. criteria a output output output output output output output output specifications specifications specifications specifications specifications specifications specifications specifications voltage set accuracy 1 % regulation C input variation vin min. to vin max. 0.2 % max. C load variation 0 C 100 % single output models: 0.5 % max. dual output models: 1 % max. C load cross variation 25 % / 100 % 5 % max. minimum load not required temperature coefficient 0.02 %/k ripple and noise (20 mhz bandwidth) 24/48 vin models: 50 mvp-p typ. 110 vin models: 75 mvp-p typ. start up time (constant resistive load) C power on 450 ms typ. C remote on 5 ms typ. transient response(25% load step change) 250 s typ. short circuit protection indefinite (automatic recovery) over load protection 150 % of iout max. typ. over voltage protection(only single output models) 3.3 v output: 3.9 v 5 v output: 6.2 v 12 v output: 15 v 15 v output: 18 v capacitive load 3.3 vdc & 5 vdc models: 1330 f 12 vdc models: 288 f 15 vdc models: 200 f 5 vdc models: 900 f (each output) 12 vdc models: 133 f (each output) 15 vdc models: 90 f (each output) http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 / 4
wra wra wra wra wra wra wra wra - - - - - - - - zd- zd- zd- zd- zd- zd- zd- zd- 8 8 8 8 8 8 8 8 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zd zd zd zd zd zd zd zd - - - - - - - - 8 8 8 8 8 8 8 8 w w w w w w w w series series temperature derating graph recommended recommended recommended recommended recommended recommended recommended recommended circuit circuit circuit circuit circuit circuit circuit circuit output graph output external capacitor table(table 1) single vout cout dual vout cout (vdc) ( f) (vdc) ( f) 3.3 2200 5 680 5 1000 12 330 12 470 15 220 15 330 -- -- parameter conditions min. typ. max. units output power see below products program 0.6 6 w positive voltage accuracy refer to recommended circuit 1 3 % negative voltage accuracy refer to recommended circuit 3 5 % load regulation form 10% to 100% load 0.5 2* % line regulation input voltage from low to high 0.2 0.5 % temperature drift (vout) refer to recommended circuit 0.02 %/ ripple** 20mhz bandwidth 20 50 mvp-p noise** 20mhz bandwidth 50 100 mvp-p switching frequency 100% load, input voltage range 300 khz * dual output models unbalanced load: 5%. ** test ripple and noise by parallel cable method. see detailed operation instructions at testing of power converter section, application notes. case material http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 / 4 application application application application application application application application note note note note note note note note outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions footprint footprint footprint footprint footprint footprint footprint footprint details details details details details details details details requirement requirement requirement requirement on on on on output output output output load load load load in order to ensure the product operate efficiently and reliably,in addition to a max load(namely full load), a minimum load is specified for this kind of dc/dc converter.make sure the specified range of input voltage is not exceeded,the minimum output load no no no no less less less less than than than than 10% 10% 10% 10% load load load load .if the actual load is less than the specified minimum load, the output ripple may increase sharply while its efficiency and reliability will reduce greatly.if the actual output power is very small,please add an appropriate resistor as extra loading,or contact our company for other lower output power products. recommended recommended recommended recommended circuit circuit circuit circuit all the wra_ z d- 8 w&wrb_ z d- 8 w series have been tested a ccording to the following recommended testing circuit before leaving factory.this series should be tested under load(see figure 1). if you want to further decrease the input/output ripple,you can increase capacitance properly or choose capacitors with low esr. however, the capacitance should not be too high, or may cause start-up problem. general: cin: 24v 48v 10 f-47 f c out : 10 f/100ma input input input input current current current current while using unstable power source,please ensure the output voltage and ripple voltage do not exceed indexes of the converter.the preceding power source must be able to provide for converter sufficient starting current ip(figure 2). general:ip 1. 6 *iin-max no no no no parallel parallel parallel parallel connection connection connection connection or or or or plug plug plug plug and and and and play play play play
wra wra wra wra wra wra wra wra - - - - - - - - zd- zd- zd- zd- zd- zd- zd- zd- 8 8 8 8 8 8 8 8 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zd zd zd zd zd zd zd zd - - - - - - - - 8 8 8 8 8 8 8 8 w w w w w w w w series series note: unit:mm[inch] pin section toleranc e s: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] mechanical mechanical mechanical mechanical mechanical mechanical mechanical mechanical dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions recommended recommended recommended recommended recommended recommended recommended recommended footprint footprint footprint footprint footprint footprint footprint footprint recommended footprint top view grid:2.54mm(0.1inch) diameter:1.00mm(0.039inch) http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3/ 4 pin single dual 2 3 gnd gnd 9 nc 0v 11 nc -vo 14 +vo +vo 16 0v 0v 22 23 vin vin nc:no connection footprint footprint footprint footprint footprint footprint footprint footprint details details details details details details details details note: 1. the load shouldn't be less than 10%, otherwise ripple will increase dramatically. 2. operation under 10% load will not damage the converter; however, they may not meet all specification listed. 3. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 4. in this datasheet, all the test methods of indications are based on corporate standards. 5. only typical models listed, other models may be different, please contact our technical person for more details. tube tube tube tube tube tube tube tube outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions note: unit :mm[inch] general tolerances: 0.50mm[ 0.020inch] l=530mm[20.866inch] tube quantity: 15pcs l=220mm[8.661inch] tube quantity: 6pcs when when when when the the the the environment environment environment environment temperature temperature temperature temperature is is is is higher higher higher higher than than than than 71 71 71 71 , , , , the the the the product product product product output output output output power power power power should should should should be be be be less less less less then then then then 60% 60% 60% 60% of of of of the the the the rated rated rated rated power. power. power. power. no no no no parallel parallel parallel parallel connection connection connection connection or or or or plug plug plug plug and and and and play. play. play. play. use use use use dual dual dual dual output output output output simultaneously,forbid simultaneously,forbid simultaneously,forbid simultaneously,forbid pening pening pening pening output output output output pin pin pin pin (0v) (0v) (0v) (0v) to to to to use use use use as as as as single single single single output. output. output. output.
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