wra wra wra wra wra wra wra wra - - - - - - - - zmd- zmd- zmd- zmd- zmd- zmd- zmd- zmd- 20 20 20 20 20 20 20 20 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zmd zmd zmd zmd zmd zmd zmd zmd - - - - - - - - 20 20 20 20 20 20 20 20 w w w w w w w w series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 3 20 20 20 20 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 high power density in 1" x 2" metal package ultra wide 4 : 1 input range extended operating temperature range C 40 to +85 max. no minimum load required i/o-isolation 1500 vdc remote on/off adjustable output voltage industry standard footprint shielded metal case with insulated baseplate optional heatsink lead free design - rohs compliant 3-year product warranty 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 m m m m m m m m d d d d d d d d - - - - - - - - 20w(1670) 20w(1670) 20w(1670) 20w(1670) 20w(1670) 20w(1670) 20w(1670) 20w(1670) product series input voltage output voltage wide ( 4 :1) input range metal shield 2" x 1" dip package style rated power (output current) the wra-zmd- 20 w wrb-zmd- 20 w series is a family of high performance 20w dc/dc converter modules featuring ultra wide 4:1 input voltage ranges in a ultra compact 2 x1 low profile package with industry-standard footprint. a very high efficiency al-lows an operating temperature range of C 40 c to 85 c. further standard features include remote on/off, output voltage trimming,over voltage protection and short-circuit protection. typical applications for these converters are battery operated equipment and distributed power architectures in communication and industrial electronics, everywhere where isolated, tightly regulated voltages are required. selection selection selection selection selection selection selection selection guide guide guide guide guide guide guide guide order code input voltage range output voltage output current max. efficiency typ. WRB2403ZMD-5500 9 C 36 vdc 3.3 vdc 5500 ma 85 % wrb2405zmd-20w 9 C 36 vdc 5 vdc 4000 ma 88 % wrb2412zmd-20w 9 C 36 vdc 12 vdc 1670 ma 86 % wrb2415zmd-20w 9 C 36 vdc 15 vdc 1330 ma 86 % wra2405zmd-20w 9 C 36 vdc 5 vdc 2000 ma 88 % wra2412zmd-20w 9 C 36 vdc 12 vdc 835 ma 87 % wra2415zmd-20w 9 C 36 vdc 15 vdc 665 ma 87 % wrb4803zmd-5500 18 C 75 vdc 3.3 vdc 5500 ma 85 % wrb4805zmd-20w 18 C 75 vdc 5 vdc 4000 ma 88 % wrb4812zmd-20w 18 C 75 vdc 12 vdc 1670 ma 87 % wrb4815zmd-20w 18 C 75 vdc 15vdc 1330 ma 87 % wra4805zmd-20w 18 C 75 vdc 5 vdc 2000 ma 89 % wra4812zmd-20w 18 C 75 vdc 12 vdc 835 ma 88 % wra4815zmd-20w 18 C 75 vdc 15 vdc 665 ma 88 % input input input input input input input input specifications specifications specifications specifications specifications specifications specifications specifications input current at no load 24 vin models: 50 ma typ. 48 vin models: 35 ma typ. input current at full load 24 vin models: 1000 ma typ. 48 vin models: 500 ma typ. surge voltage (100 msec. max.) 24 vin models: 50 v max. 48 vin models: 100 v max. input voltage variation (dv/d f ) 5 v / ms, max. (complies to ets 300 132 part. 4.4) start-up voltage / under voltage lockout 24 vin models: 9 vdc / 7.5 vdc typ. 48 vin models: 18 vdc / 15 vdc typ. conducted noise(input) en 55022 level a, fcc part 15, level a with external capacitor (see application note) esd (input) en 61000-4-2, perf. criteria b fast transient (input) en 61000-4-4, perf. criteria b surge (input) en 61000-4-5, perf. criteria b general general general general general general general general specifications specifications specifications specifications specifications specifications specifications specifications reliability, calculated mtbf (mil-hdbk-217f ground benign) >560000 h @ + 25 c isolation voltage (60 sec.) C input/output 1500 vdc isolation capacity C input/output 1500 pf max isolation resistance C input/output >1000 m ohm switching frequency (fixed) 400 khz typ. (pulse width modulation pwm) vibration 10-55hz, 10g, 30 minutes along x,y,z remote on/off C on: 3.0 to 12 vdc or open circuit. C off: 0 to 1.2 vdc or short circuit pin 2 and pin 6 C off idle current: 2.5 ma typ. safety standards ul 60950
wra wra wra wra wra wra wra wra - - - - - - - - zmd- zmd- zmd- zmd- zmd- zmd- zmd- zmd- 20 20 20 20 20 20 20 20 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zmd zmd zmd zmd zmd zmd zmd zmd - - - - - - - - 20 20 20 20 20 20 20 20 w w w w w w w w series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 3 output output output output output output output output specifications specifications specifications specifications specifications specifications specifications specifications voltage set accuracy 1 % output voltage adjustment (single output models only) 10 % by external resistor, see application note: http://www.microdc.cn/uploadfiles/ wra - zm d-2 0 w &wrb - zm d-2 0 w.pdf 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. (balanced load) C load cross variation 25 % / 100 % 5 % max. temperature coefficient 0.02 % /k ripple and noise (20 mhz bandwidth) single output models: dual output models: 75 mvpk-pk max. 100 mvpk-pk max. start up time (nominal vin and constant resistive load) 20 ms typ. transient response (25% load step change) 20 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 3.3 vout models: 3.9 v 5 / 5 vout models: 6.2 / 6.2 v 12 / 12 vout models: 15 / 15 v 15 / 15 vout models: 18 / 18 v capacitive load 3.3 vout models: 18 000 f max. 5 vout models / 5 vout models: 9600 f max. / 4800 f max. 12 vout models / 12 vout models: 1600 f max. / 800 f max. 15 vout models / 15 vout models: 1000 f max. / 500 f max. 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 humidity (non condensing) 95 % rel h max. physical physical physical physical physical physical physical physical specifications specifications specifications specifications specifications specifications specifications specifications case material copper, nickel plated baseplate material non conductive fr4 potting material epoxy (ul 94v-0 - rated) weight 27 g (0.95 oz) soldering temperature max. 265 c / 10 sec. application application application application application application application application note note note note note note note note 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 less than 10% 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 md- 20 w&wrb_ z md- 20 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 apacitance properly or choose capacitors with low esr.however,the capacitance of the output filter capacitor must be proper.if the capacitance is too big,a startup p roblem might arise.for every channel of output,provided the safe and reliable operation is ensured,the greatest capacitance of its filter capacitor sees (table 1).general: cin: 10 f-47 f c out : 10 f/100ma ctrl ctrl ctrl ctrl terminal terminal terminal terminal when open or high impedance,the converter work well; when this pin is high ; the converter shutdown; it should be note that the input current (ic) should between 5-10ma, exceeding the maximum 20ma will cause permanence damage to the converter. the value of r can be derived as follows : 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 - - - - - - - - zmd- zmd- zmd- zmd- zmd- zmd- zmd- zmd- 20 20 20 20 20 20 20 20 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zmd zmd zmd zmd zmd zmd zmd zmd - - - - - - - - 20 20 20 20 20 20 20 20 w w w w w w w w series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 of 3 note: unit:mm[inch] pin section tolerances: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] 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 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 pin single dual 1 gnd gnd 2 vin vin 3 +vo +vo 4 n c 0v 5 0v -vo nc:no connection footprint footprint footprint footprint footprint footprint footprint footprint details details details details details details details details 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. 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= 230 mm[ 9.055 inch] tube quantity: 7 pcs
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