UM7400W SERIES
40Watt DC-DC Converter
♦
Synchronous Rectifier Topology
♦
Remote On/Off Control
♦
Efficiency to 90%
♦
Standard 2”×2” Package
♦
Over Temperature Protection
♦
Safety Approval Pending
SPECIFICATIONS
All specifications are typical at nominal line, full load at
25°C unless otherwise noted.
GENERAL SPECIFICATIONS
Isolation Voltage(Input to Output) ……………...… 1500VDC
Isolation Resistance …………………..………….. 100 Mohm
Switching Frequency ……….………….….…… 350 KHz typ.
Operating Temperature Range,
Ambient, 40W, None Derating …………… -40°C to +60°C
With Derating …...….………….. to +100°C
Cooling …………………….………...… Free Air Convection
Storage Temperature ……………………… -40°C to +105°C
EMI/RFI …………….…………. Six-Sided Continuous Shield
Dimensions …………………….....………...… 2*2*0.4 inches
(50.8*50.8*10.4mm)
Case Material …………………… Black Coated Copper With
Conductive Base
Weight ..………………………..…………………………… 50g
INPUT SPECIFICATIONS
Input Voltage Range, 24V Nominal ……………… 9-36VDC
48V Nominal …….…..…… 18-75VDC
Input Undervoltage Shutdown, 24V ……………... 8VDC typ.
48V ….………… 16VDC typ.
Input Filter …………………………………….…… Pi Network
1
OUTPUT SPECIFICATIONS
Voltage Accuracy …………………………..…. ±1% max.
External Trim Adj. Range ……….……………..………. ±10%
Line Regulation
2
………………….……………… ±0.5% max.
Load Regulation
3
,Single………………………… ±0.5% max.
Transient Response
(100% to 50% full load at ±1% error band) ……..
≤500us
Ripple and Noise , 20MHz-BW
4
3.3-5V …..……..…….
≤25
mV RMS max.
100 mV P-P max.
12-15V …..…….…….
≤40
mV RMS max.
150 mV P-P max.
Temperature Coefficient ………….….……. ±0.02％/°C max.
Overvoltage Protection Trip Point (Zener Clamp Type)
3.3V ………………………………………..….… 4.3V typ.
5V …………………………………………..…… 6.8V typ.
12V ..………………………………………...…… 15V typ.
15V ..………………………………………...…… 18V typ.
Short Circuit Protection ………………………..… Continuous
5
Over Temperature Shutdown Point ……………. 105°C typ.
Minimum Load
6
……………….. No Minimum Load Required
NOTES:
1. Start up voltage (UM741XXX) ………………….. (10-36V)
2. Measure from high line to low line.
3. Single: from full load to 1/4 load.
Dual: load balanced from full load to 1/2 load.
4. Measure with 1uF ceramic cap. connected to the output pins.
5. Defined as case temperature and 3~5°C recovery
hysteresis; Non-latching shutdown protection.
6. This converter can operating at no load condition but
10% loading on the output is preferred to maintain
specified regulation operation. under no load conditions
will not damage these devices,. However they may not
meet all listed specification.
7. Standard product is active high, active low remote On/Off
option is available, to order suffix a “N” to the model
number e.g.: UM7423V3WSN.
REMOTE ON/OFF CONTROL
Logic Compatibility ………… CMOS or Open Collector TTL
Converter ON …………………..… >+2.5Vdc or open circuit
Converter OFF…………………… <+0.8Vdc or jump to pin2
Control common ……………………………………….… pin2
Temperature derating curve
Output Power
No Heat Sink
100%
with Heat Sink H1
75%
Ambient
Temperature (°C)
-40
0
60 70 75 85
100
Maximum case temperature must not be exceeded 105°C.
UNIVERSAL
MICROELECTRONICS
UM7400W SERIES
1
of 3
3,27TH RD., TAICHUNG INDUSTRIAL PARK,
TAICHUNG, TAIWAN, R.O.C.
TEL: 886-4-23590096 FAX: 886-4-23590129
REV.1
Microcontroller MCU
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