WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W s s eries eries http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 3 order code input output efficiency (%) capacitor load (uf) voltage (vdc) current no load (ma ) current full load (ma ) voltage (vdc) current (ma) wra1212ymd-20w 9-18 30 1937 12 835 89 470 wra1215ymd-20w 9-18 30 1937 15 665 89 330 wra2412ymd-20w 18-36 30 957 12 835 90 470 wra2415ymd-20w 18-36 30 957 15 665 90 330 wra4812ymd-20w 36-75 20 478 12 835 90 470 wra4815ymd-20w 36-75 20 484 15 665 89 330 *input voltage can t exceed this value, or will cause the permanent damage. model model model model model model model model selection selection selection selection selection selection selection selection wra wra wra wra wra wra wra wra 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 y y y y y y y y md md md md md md md md - - - - - - - - 20 20 20 20 20 20 20 20 w w w w w w w w (835) (835) (835) (835) (835) (835) (835) (835) product series input voltage output voltage wide ( 2 :1) input range package style rated power (output current) 20w, wide input, isolated®ulated dual outputdc-dc converter features features features features features features features features efficiency up to 87% wide (2:1)input range 1500 vdc i/o isolation short circuit protection (automatic recovery) operating temperature: -40 c to+85 c internal smd construction metal shielding package reg. dual output mtbf>1,000,000 hours soft start and remote ctrl. over voltage/current protection rohs compliance applications applications applications applications applications applications applications applications selection selection selection selection selection selection selection selection guide guide guide guide guide guide guide guide the WRA-YMD-20W series is a family of cost effective 20 w, dual output dc/dc converters with a wide 2:1 input. these converters are encapsulated in nickel coated copper2 x1 case with high performance technology like active clamp, high efficiency operation and output voltage accuracy of 1% maximum. precise controlled design provides tight line / load regulation . microdc microdc microdc microdc reserves reserves reserves reserves the the the the copyright copyright copyright copyright input input input input input input input input specifications specifications specifications specifications specifications specifications specifications specifications voltage range 2:1 wide input input filter pi type input reflected ripple current 1 20 ma pk-pk start up time (nom. vin and constant resistive load) 20ms, typ. output output output output output output output output specifications specifications specifications specifications specifications specifications specifications specifications voltage accuracy 1% voltage adjustability (trim C only single output) 10%, max. short circuit protection indefinite (hiccup, automatic recovery) over current protection 140% of max. iout line regulation 0.2% load regulation (0% - 100%) 1% (dual) cross regulation 3 (dual output) 5% ripple and noise (20mhz bandwidth) 75 mv pk-pk temperature coefficient 0.02% / c transient recovery time 4 250us, typ. transient response deviation 4 3%, max. general general general general general general general general specifications specifications specifications specifications specifications specifications specifications specifications efficiency see table i/o isolation voltage (3 sec.) 1500 vdc i/o isolation capacitance 1200 pf, typ. i/o isolation resistance 1000 m ohm switching frequency 330 khz, typ. humidity 95% rel h reliability calculated mtbf (mil-hdbk-217f) > 0.684 mhrs physical physical physical physical physical physical physical physical specifications specifications specifications specifications specifications specifications specifications specifications case material nickel coated copper potting material epoxy (ul94v-0 rated) weight ~ 30g, typ. environment environment environment environment environment environment environment environment specifications specifications specifications specifications specifications specifications specifications specifications operating temperature -40 to +71 c (ambient) maximum case temperature 100 c storage temperature -40 to +125 c cooling free air convection rohs conform soldering 260 c, max. (1.5mm from case 10s.)
WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W s s eries eries http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 3 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 note: unit : mm[inch] pi n diameter tolerances: 0.10mm[ 0.004 inch] general tolerances: 0.25mm[ 0.010 inch] recommended recommended recommended recommended recommended recommended recommended recommended footprint footprint footprint footprint footprint footprint footprint footprint tube tube tube tube tube tube tube tube outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions output output output output output output output output voltage voltage voltage voltage voltage voltage voltage voltage trim trim trim trim trim trim trim trim up/down up/down up/down up/down up/down up/down up/down up/down external output trimming output can be externally trimmed. (single output models only!) over over over over over over over over voltage voltage voltage voltage voltage voltage voltage voltage protection protection protection protection protection protection protection protection (zender (zender (zender (zender (zender (zender (zender (zender diode diode diode diode diode diode diode diode clamp) clamp) clamp) clamp) clamp) clamp) clamp) clamp) 12 vout 15 v 15 vout 18 v under under under under under under under under voltage voltage voltage voltage voltage voltage voltage voltage lockout lockout lockout lockout lockout lockout lockout lockout (typ.) (typ.) (typ.) (typ.) (typ.) (typ.) (typ.) (typ.) 12 vin models module on/off 8.6v / 7.9v 24 vin models module on/off 17.8v / 16v 48 vin models module on/off 33.5v / 30.5v remote remote remote remote remote remote remote remote on/off on/off on/off on/off on/off on/off on/off on/off control control control control control control control control on: 3 -12 vdc or open circuit off: 0 C 1.2 vdc or short circuit pin2 and pin6* off idle current: 5ma, typ. pin pin pin pin pin pin pin pin connections connections connections connections connections connections connections connections # # # # dual dual dual dual 1 +vin 2 - vin 3 +vout 4 common 5 - vout 6* ctrl. * ctrl ctrl ctrl ctrl can can can can be be be be added added added added according according according according to to to to customers' customers' customers' customers' need need need need
WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W WRA-YMD-20W s s eries eries http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 of 3 derating derating derating derating derating derating derating derating & & & & & & & & efficiency efficiency efficiency efficiency efficiency efficiency efficiency efficiency curve curve curve curve curve curve curve curve 1. 1. 1. 1. temperature temperature temperature temperature derating derating derating derating curve curve curve curve 2. 2. 2. 2. efficiency efficiency efficiency efficiency vs vs vs vs input input input input voltage voltage voltage voltage wra2412ymd-20w wra2412ymd-20w wra2412ymd-20w wra2412ymd-20w efficiency vs input voltage 3. 3. 3. 3. efficiency efficiency efficiency efficiency vs vs vs vs output output output output power power power power wra2412ymd-20w wra2412ymd-20w wra2412ymd-20w wra2412ymd-20w efficiency vs output load emc emc emc emc emc emc emc emc specifications specifications specifications specifications specifications specifications specifications specifications radiated emissions en 55022 class a conducted emissions en 55022 class a esd en 61000-4-2 perf. criteria b rs en 61000-4-3 perf. criteria a eft 6 en 61000-4-4 perf. criteria b surge 6 en 61000-4-5 perf. criteria b cs en 61000-4-6 perf. criteria a pfmf en 61000-4-8 perf. criteria a part part part part # # # # c1 c1 c1 c1 l l l l wra12xxymd-20w en 61000-4-4 perf. criteria b wra24xxymd-20w en 61000-4-5 perf. criteria b wra48xxymd-20w en 61000-4-6 perf. criteria a microdc professional power module,inc. tel:0086-20-86000646 e-mail:tech@microdc.cn website:http://www.microdc.cn microdc professional power module,inc.makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. specifications are subject to change without notice. ? 2010 microdc professional power module, inc. guangzhou rohs rohs rohs rohs compliant compliant compliant compliant information information information information this series is compatible with rohs soldering systems with a peak wave solder temperature of 300 c for 10 seconds. the pin termination finish on the sip package type is tin plate, hot dipped over matte tin with nickel preplate. the dip types are matte tin over nickel preplate. both types in this series are backward compatible with sn/pb soldering systems. reach reach reach reach compliant compliant compliant compliant information information information information this series has proven that this product does not contain harmful chemicals, it also has harmful chemical substances through the registration, inspection and approval. 1 = measured input reflected ripple current with a simulated source inductance of 12uh. 2 = tested by minimal vin and constant resistive load. 3 = one load is 25% to 100% load, the other load is100% load, the output voltage variable rate is within 5%. 4 = tested by nominal vin and 25% load step change (75% - 50% - 25% of io) 5 = input filter components (c1, l)are used to help meet conducted emissions requirent for the module. these components should be mounted as close as possible to the module; and all leads should be minimized to decrease radiated noise. 6 = an external filter capacitor is required if the module has to meet en61000-4-4 and en61000-4-5 -- input filter components (c1, c2, l) are used to help meet conducted emissions requirement for the module. these components should be mounted as close as possible to the module; and all leads should be minimized to decrease radiated noise.
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