UM7700 SERIES
40Watt DC-DC Converter
♦
Synchronous Rectifier Topology
♦
Remote On/Off Control
♦
Efficiency to 92%
♦
Over Temperature Protection
SPECIFICATIONS
All specifications are typical at nominal line, full load at
25°C unless otherwise noted.
Dimensions …………………….……….. 2.0*1.6*0.46 inches
(50.8*40.6*11.7 mm)
Case Material ………………… Black Coated Copper With
Conductive Base
Weight ..………………………..…………………………… 50g
INPUT SPECIFICATIONS
Input Voltage Range, 12V Nominal …..……..……. 9-18VDC
24V Nominal ………..……. 18-36VDC
48V Nominal ………...…… 36-75VDC
Input Undervoltage Shutdown, 12V …….……..… 8VDC typ.
24V …….……… 16VDC typ.
48V ….………… 32VDC typ.
Input Filter …………………………………….…… Pi Network
NOTES:
1. Measure from high line to low line.
2. Single: from full load to 1/4 load.
Dual: load balanced from full load to 1/2 load.
3. Measure with 4.7uF ceramic cap. connected to the output pins.
4. Defined as case temperature and 3~5°C recovery
hysteresis; Non-latching shutdown protection.
5. 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.
6. Standard product is active high, active low remote On/Off
option is available, to order suffix a “N” to the model
number e.g.: UM7723V3SN.
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 pin3
Control common ……………………………………….… pin3
Temperature derating curve
Output Power
No Heat Sink (B,C)
100%
with Heat Sink H1 (B,C)
75%
With Heat Sink H1 (A)
Ambient
Temperature (°C)
OUTPUT SPECIFICATIONS
Voltage Accuracy …………………………..…. ±1% max.
External Trim Adj. Range ……….……………..………. ±10%
1
Line Regulation ………………….……………… ±0.5% max.
2
Load Regulation , Single, 3.3V, 5V ….………… ±1.0% max.
12V, 15V ……………. ±0.5% max.
Dual …………………..……… ±0.5% max.
Transient Response
(100% to 50% full load at ±1% error band) ……..
≤500us
3
Ripple and Noise , 20MHz-BW
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 …………………………………………..…… 6.2V typ.
12V ..………………………………………...…… 15V typ.
15V ..………………………………………...…… 18V typ.
Short Circuit Protection ………………………..… Continuous
4
Over Temperature Shutdown Point ……………. 110°C typ.
5
Minimum Load ……………….. No Minimum Load Required
-40
0
45
55 65 70 80
100
GENERAL SPECIFICATIONS
Isolation Voltage(Input to Output) ……………...… 1500VDC
Isolation Resistance …………………..…..… 100 Mohm min.
Switching Frequency ……….………….….…… 330 KHz typ.
Operating Temperature Range,
Ambient, 40W, None Derating ….. -40°C to +45(55)(65)°C
(See Temperature derating curve)
With Derating …...….….……….. to +100°C
Cooling ……………………..………...…Free Air Convection
Storage Temperature ……………………… -40°C to +105°C
EMI/RFI …………….…………. Six-Sided Continuous Shield
A : For 12V input voltage models
B : For 24V input voltage models
C : For 48V input voltage models
Maximum case temperature must not be exceeded 105°C.
Output Power derating curve
Input Voltage
12V
11V
10V
9V
85%90%95%100%
Output Power
A : For 12V input voltage models derating curve
UNIVERSAL
MICROELECTRONICS
UM7700 SERIES
3,27TH RD., TAICHUNG INDUSTRIAL PARK,
TAICHUNG, TAIWAN, R.O.C.
TEL: 886-4-23590096 FAX: 886-4-23590129
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