UM3429资料

15 Watts DC-DC Converters

♦ Surface Mount Isolated DC-DC Converter ♦ Low Weight, Open Frame Package ♦ Efficiency to 88% ♦ 2:1 Input Range

♦ 400KHz Switching Frequency ♦ Remote On/Off Control

♦ Compliant with Industry Standard Reflow Profiles SPECIFICATIONS All specifications are typical at nominal line, full load and 25°C unless otherwise noted. INPUT SPECIFICATIONS Input Voltage Range, 48V .……………..……………. 36-75V Input Filter ………………………………..………... Pi Network NOTES 1. EXTERNAL OUTPUT TRIMMING Output may optionally be externally trimmed (±10%)with a fixed resistor or an external trimpot as shown. OUTPUT SPECIFICATIONS Voltage Accuracy ..………………………………… ±2% max. 1Voltage Adjustability …………………………………… ±10% Transient Response, 50% Step Load Change(1% error band) ……….. <500μS Temperature Coefficient ……………….…±0.02%/°C max. Short Circuit Protection .…………………..…… Continuous Overvoltage Protection Trip Point (Zener Clamp Type) 2.5V,3.3V …………………………………………… 4.3V 5V …………………………………………………… 6.8V 2Line Regulation .…..……………………………. ±0.5% max. 3Load Regulation ……………………………..…. ±0.5% max. Maximum Capacitive Load ………………………….. 1000uF 4 Ripple and Noise, 20MHz BW... 100mVp-p,30mVrms max. GENERAL SPECIFICATIONS Efficiency .…………………………………….…… See Table Isolation Voltage ……………………………… 1500VDC min. 8Isolation Resistance ………………………….. 10 ohms min. Switching Frequency …..……………………….. 400KHz typ. 6Operating Ambient Temperature ….……… -40°C to +70°C Cooling ………………………………….. Free Air Convection Storage Temperature Range ..….……….… -40°C to+105°C Dimensions ………………….…….…….. 2*1.12*0.41 inches (50.8*28.5*10.4mm) Weight ……………………………………………………… 15g 5UM3400 1 of 2 REV.1 UNIVERSAL MICROELECTRONICSUM3421 trim adj. Range: ±5% (36V≤Vin<48V), ±10% (48V≤Vin≤75V). 2. Measured from high line to low line. 3. Measured from full load to 1/10 load. 4. Measured with 0.1uF ceramic capacitor connect to the output pins. 5. Measured at nominal line. 6. Output Power 100%. A: UM3421 B: UM3428, UM3429 B A Ambient Temperature -40 60 70 100 (°C) Maximum baseplate heat sink temperature must not be exceeded 100°C. 7. The converter required a minimum 10% loading on the output. Operation below 10% load conditions will not damage these devices. However they may not meet all listed spec. 8. REMOTE ON/OFF CONTROL Logic Compatibility ………. CMOS or Open Collector TTLEc-ON …………….…..………. > 2.5 VDC or Open CircuitEc-OFF…..……….…………..………………….. < 1.2 VDCControl Common ……….……. Referenced to Input Minus9. Recommended Reflow Soldering 3,27TH RD., TAICHUNG INDUSTRIAL PARK, TAICHUNG, TAIWAN, R.O.C. TEL: 886-4-23590096 FAX: 886-4-23590129 MODEL NUMBER UM3421 UM3428 UM3429 INPUT VOLTAGE 48 VDC 48 VDC 48 VDC OUTPUT VOLTAGE 5 VDC 2.5 VDC 3.3 VDC OUTPUT CURRENT 3000 mA 3000 mA 3000 mA INPUT CURRENT NO LOAD 20 mA 20 mA 20 mA FULL LOAD 355 mA 180 mA 235 mA % EFF (typ.) 88 87 88 NOTE: Other output voltage can be supported upon request. 1VO+20NC VO-219NC 3VO+18NC 17TRIMVO-4 5VO-16NC NC615NC 7NC14NC 8NC13NC *NC (N1 Connection) All dimensions in inches (mm). 9NC12REM Tolerance .xx =±0.04” Vin+1011Vin- .xxx=±0.010” Recommended Pad Position and Dimension UM3400 2 of 2 REV.1 UNIVERSAL MICROELECTRONICS3,27TH RD., TAICHUNG INDUSTRIAL PARK,TAICHUNG, TAIWAN, R.O.C. TEL: 886-4-23590096 FAX: 886-4-23590129