wra wra wra wra wra wra wra wra - - - - - - - - zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 2 2 2 2 2 2 2 2 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zmd zmd zmd zmd zmd zmd zmd zmd -1 -1 -1 -1 -1 -1 -1 -1 2 2 2 2 2 2 2 2 w w w w w w w w series series 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 - - - - - - - - 1 1 1 1 1 1 1 1 2w(1000) 2w(1000) 2w(1000) 2w(1000) 2w(1000) 2w(1000) 2w(1000) 2w(1000) product series input voltage output voltage wide ( 4 :1) input range metal shield 2" x 1" dip package style rated power (output current) 1 1 1 1 2 2 2 2 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 ultrawide 4 : 1 input range 9 C 36 vdc and 18 C 75 vdc full smd-design input filter meets en 55022,class a and fcc,level a without external components indefinite short-circuit protection overvoltage protection i/o-isolation 1500 vdc 2" x 1" metal package insulated baseplate mtbf>1000khours industry standard pinout 2 year product warranty applications applications applications applications applications applications applications applications microdc reserves the copyright http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1/3 the wra-zmd-12w wrb-zmd-12w series series of dc/dc converters has been designed for a wide range of applications including communications, industrial systems and battery powered mobile equipments. key features are high power density (12w in a 2 x1 x 0.4 package) and ultrawide input ranges of 9 C 36 vdc and 18 C 75 vdc. other features of this converter are internal filtering according to en 55022, level a, safety approval to en 60950 and ul 1950, wide operating temperature range and remote on/off (opt.). selection selection selection selection selection selection selection selection guide guide guide guide guide guide guide guide ordercode input voltage range output voltage output current max. efficiency typ. WRB2403ZMD-2400 9 C 36 vdc 3,3 vdc 2400 ma 78 % wrb2412zmd-12w 9 C 36 vdc 12 vdc 1000 ma 84 % wrb2415zmd-12w 9 C 36 vdc 15 vdc 800 ma 84 % wra2412zmd-12w 9 C 36 vdc 12 vdc 500 ma 84 % wra2415zmd-12w 9 C 36 vdc 15 vdc 400 ma 84 % wrb4803zmd-2400 18 C 75 vdc 3,3 vdc 2400 ma s wrb4812zmd-12w 18 C 75 vdc 12 vdc 1000 ma 84 % wrb4815zmd-12w 18 C 75 vdc 15 vdc 800 ma 84 % wra4812zmd-12w 18 C 75 vdc 12 vdc 500 ma 84 % wra4815zmd-12w 18 C 75 vdc 15 vdc 400 ma 84 % input input input input input input input input specifications specifications specifications specifications specifications specifications specifications specifications input current(no load) 24 vin models 40 ma typ. 48 vin models 20 ma typ. input current(full load) 24 vin; 3.3 vout models: 425 ma typ. 24 vin; 5 & 5 vout models: 510 ma typ. 24 vin; other output models: 600 ma typ. 48 vin; 3.3 vout models: 215 ma typ. 48 vin; 5 & 5 vout models: 255 ma typ. 48 vin; other output models: 300 ma typ. surge voltage(1 sec. max.) 24 vin models 42 v max. 48 vin models 84 v max. reverse voltage protection 1.0 a max. conducted noise (input) en 55022 level a, fcc part 15, level a general general general general general general general general specifications specifications specifications specifications specifications specifications specifications specifications temperature ranges C operating C 40 c ... + 60 c C case temperature + 95 c max. C storage C 40 c ... + 125 c derating above 60 c: 3% / c humidity non condensing 95 % rel h max. reliability, calculated mtbf mil-hdbk-217 e > 700 000 h @ +25 c isolation voltage input/output 1500 vdc isolation capacity input/output 200 pf typ isolation resistance input/output (500 vdc) > 1000 m ohm switching frequency fixed 400 khz typ. (pulse width modulation pwm) remote on/off (optional): on: 2.5 ... 5.5 vdc or open circuit. off: 0 ... 0.8 vdc or short circuit pin 2 and pin 6 off idle current: 10 ma max. safety standards: ul 1950, en 60950, iec 60950 compliance up to 60 vdc input voltage (selv limit) safety approvals: cul/ul file e188913
wra wra wra wra wra wra wra wra - - - - - - - - zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 2 2 2 2 2 2 2 2 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zmd zmd zmd zmd zmd zmd zmd zmd -1 -1 -1 -1 -1 -1 -1 -1 2 2 2 2 2 2 2 2 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 /3 typical typical typical typical typical typical typical typical characteristics characteristics characteristics characteristics characteristics characteristics characteristics characteristics 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) 5 680 5 680 12 470 12 330 15 330 15 220 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- 1 2 w&wrb_ z md- 1 2 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 of the output filter capacitor must be proper.if the capacitance is too big,a startup problem 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 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. 0.5 % max. C load variation 10 C 90 % 0.5 % max. ripple and noise 20 mhz bandwidth 50 mvpk-pk typ. temperature coefficient 0.02 % / c output current limitatio n >110% of iout max. foldback short circuit protection hiccup mode, indefinite (automatic recovery) capacitive load C single output models 470 f max. C dual output models 100 f max. physical physical physical physical physical physical physical physical specifications specifications specifications specifications specifications specifications specifications specifications case material steel chrome-nickel plated baseplate epoxy potting material silicon rubber (flammability to ul 94 v-0) weight 30 g (1.2 oz) soldering temperature max. 250 c / 10 sec.
wra wra wra wra wra wra wra wra - - - - - - - - zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 zmd-1 2 2 2 2 2 2 2 2 w w w w w w w w wrb wrb wrb wrb wrb wrb wrb wrb - - - - - - - - zmd zmd zmd zmd zmd zmd zmd zmd -1 -1 -1 -1 -1 -1 -1 -1 2 2 2 2 2 2 2 2 w w w w w w w w series series 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 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 3/3 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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