wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 1 of 5 product product product product product product product product program program program program program program program program part part part part number number number number input input input input voltage(vdc) voltage(vdc) voltage(vdc) voltage(vdc) input input input input current current current current (ma) (ma) (ma) (ma) output output output output voltage voltage voltage voltage (vdc) (vdc) (vdc) (vdc) current current current current (ma) (ma) (ma) (ma) efficienc efficienc efficienc efficienc y y y y (%,typ) (%,typ) (%,typ) (%,typ) nominal nominal nominal nominal range range range range normal normal normal normal adjust adjust adjust adjust range range range range vin vin vin vin (min.) (min.) (min.) (min.) vin vin vin vin (max.) (max.) (max.) (max.) wrn781.5t-1000 12 5.0-18 165 1.5 fixed 1000 76 73 wrn781.8t-1000 12 5.0-18 190 1.8 1.5-3.6 1000 78 75 wrn782.5t-1000 12 5.0-18 245 2.5 1.5-3.9 1000 82 82 WRN7803T-1000 12 5.0-18 320 3.3 1.8-5.5 1000 84 84 wrn7805t-1000 12 7.0-18 460 5.0 2.5-6.5 1000 90 88 wrn786.5t-1000 12 8.5-18 580 6.5 fixed 1000 92 91 note: to adjust the output voltage must be met vin-vo>2v. input current measured at nominal input voltage and rated output load. model model model model model model model model selection selection selection selection selection selection selection selection wr wr wr wr wr wr wr wr n78 n78 n78 n78 n78 n78 n78 n78 05 05 05 05 05 05 05 05 t t t t - - - - - - - - 1000 1000 1000 1000 1000 1000 1000 1000 product series output voltage smd package style output current input input input input input input input input specifications specifications specifications specifications specifications specifications specifications specifications input specifications item item item item test test test test conditions conditions conditions conditions min. min. min. min. typ. typ. typ. typ. max. max. max. max. units units units units input filter capacitor (10 f) start current(rms) 0.95 1.1 a wide wide wide wide input, input, input, input, non-isolated non-isolated non-isolated non-isolated & & & & regulated regulated regulated regulated smd smd smd smd package package package package single single single single output output output output features features features features features features features features efficiency up to 92% no heatsink required 1.0amp smd package super low ripple and noise adjustable output voltage remote on/off control short circuit protection low control current operating temperature: -40 ~ +85 applications applications applications applications applications applications applications applications the wrn 78xx t - 1000 series with high efficiency switching regulators are ideally supply for space constrained mobile applications. there is no need for any heatsinks. the additional features include remote on/off control and adjustable output voltage. super low ripple and noise of typically only 20mv and low control current. microdc reserves the copyright output output output output output output output output specifications specifications specifications specifications specifications specifications specifications specifications item item item item test test test test conditions conditions conditions conditions min. min. min. min. typ. typ. typ. typ. max. max. max. max. units units units units output voltage accuracy input voltage range at full load 2 3 % line regulation 0.2 0.5 load regulation nominal input,10% to 100% load 0.4 1.0 ripple and noise* 20mhz bandwidth 20 35 mvp-p 20mhz bandwidth(refer to figure 6) 10 15 short circuit protection mode hiccup mode short circuit protection continuous, automatic recovery inside wasted 0.5 w thermal shutdown internal ic junction 150 output current limit 1.8 a switching frequency pwm type 1.4 mhz transient peak deviation input voltage range,10% to 100% load 75 100 mv transient recovery time 100 s quiescent current 1 3 ma temperature coefficient -40 ~ +85 ambient 0.02 %/ max capacitance load 1000 f remote on/off on open or 1.2 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 2 of 5 typical typical typical typical typical typical typical typical temperature temperature temperature temperature temperature temperature temperature temperature curve curve curve curve curve curve curve curve common common common common common common common common specifications specifications specifications specifications specifications specifications specifications specifications item item item item test test test test conditions conditions conditions conditions min. min. min. min. typ. typ. typ. typ. max. max. max. max. units units units units case material plastic (ul94-v0) mtbf (mil-hdbk-217f,+25 ) 1000 k hours hop swap not supported thermal resistance 90 / w weight 2.3 g adjustment adjustment adjustment adjustment adjustment adjustment adjustment adjustment resistor resistor resistor resistor resistor resistor resistor resistor values values values values values values values values the r1, r2 in the above table are used to set the output voltage . if no need to adjust the output voltage, connect a ceramic capacitor to gnd with 470pf typical value for increase immunity. insure the output voltage is in the adjust range or else may cause permanent damage to the device. fine-tune output voltage must appease vin-vo>2v. emc emc emc emc emc emc emc emc specifications specifications specifications specifications specifications specifications specifications specifications ce en55022, class a(without external circuit) en55022, class b(refer to figure 4) re en55022, class a(refer to figure 5) esd iec/en61000-4-2 air 8 kv / contact 6 kv perf. criteria b eft iec/en61000-4-4 2 kv perf. criteria b surge iec/en61000-4-5 2 kv perf. criteria b(refer to figure 4) typical typical typical typical typical typical typical typical application application application application application application application application circuit circuit circuit circuit circuit circuit circuit circuit 1. c1, c2 is required for best performance and should be fitted close to the converter pins. 2. the capacitance of c1, c2 sees external capacitor table, it can be increased properly if required, and tantalum or low esr electrolytic capacitors may also suffice. 3. no parallel connection or plug and play. recommended recommended recommended recommended recommended recommended recommended recommended reflow reflow reflow reflow reflow reflow reflow reflow soldering soldering soldering soldering soldering soldering soldering soldering profile profile profile profile profile profile profile profile
wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 3 of 5 emc emc emc emc emc emc emc emc recommended recommended recommended recommended recommended recommended recommended recommended circuit circuit circuit circuit circuit circuit circuit circuit application application application application application application application application example example example example example example example example to reduce output ripple, it is recommended to add a lc filter to output port. l: recommended parameter 10 h ~ 47 h . test test test test test test test test configurations configurations configurations configurations configurations configurations configurations configurations (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 (ta=25 ) ) ) ) ) ) ) )
wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 4 of 5 characteristic characteristic characteristic characteristic characteristic characteristic characteristic characteristic curve curve curve curve curve curve curve curve emc emc emc emc emc emc emc emc testing testing testing testing testing testing testing testing wave wave wave wave wave wave wave wave shape shape shape shape shape shape shape shape
wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 wrn78xxt-1000 series series http://www.microdc.cn technical enquiries-email:tech@microdc.cn tel:0086-20-86000646 page 5 of 5 outline outline outline outline outline outline outline outline dimensions dimensions dimensions dimensions dimensions dimensions dimensions dimensions & & & & & & & & recommended recommended recommended recommended recommended recommended recommended recommended footprint footprint footprint footprint footprint footprint footprint footprint &packaging &packaging &packaging &packaging &packaging &packaging &packaging &packaging mechanical mechanical mechanical mechanical dimensions dimensions dimensions dimensions recommended recommended recommended recommended footprint footprint footprint footprint tube tube tube tube outline outline outline outline dimensions dimensions dimensions dimensions tapingreel tapingreel tapingreel tapingreel dimensions dimensions dimensions dimensions microdc professional power module,inc. tel:0086-20-86000646 e-mail:tech@microdc.cn website:http://www.microdc.cn 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.
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