UM6700W SERIES
20Watt DC-DC Converter
♦
Synchronous Rectifier Topology
♦
Remote On/Off Control
♦
4:1 Ultra Wide Input Voltage Range
♦
Efficiency to 88%
♦
Standard 2”×1” Package
♦
Over Temperature Protection
♦
Safety Approval Pending
SPECIFICATIONS
All specifications are typical at nominal line, full load at
25°C unless otherwise noted.
Storage Temperature ……………………… -55°C to +125°C
EMI/RFI………………………. Five-Sided Continuous Shield
Dimensions ………………………………..… 2*1*0.45 inches
(50.8*25.4*11.4mm)
Case Material …………………… Black Coated Copper With
Non-Conductive Base
Weight ..………………………..…………………………… 30g
Input Voltage Range, 24V Nominal ……………... 9-36VDC
48V Nominal ………..…… 18-75VDC
Input Start-Up Voltage, 24V ……………….…... 9VDC max.
48V ….…………....….. 18VDC max.
Input Undervoltage Shutdown, 24V …………... 7.5VDC typ.
48V ….………… 16VDC typ.
Input Overvoltage Shutdown, 24V ……..……... 40VDC typ.
48V ….……..…… 80VDC typ.
Input Filter …………………………………….…… Pi Network
Voltage Accuracy
1
…………………………..…. ±1% max.
External Trim Adj. Range ……….……………..………. ±10%
Line Regulation
2
………………….……………… ±0.5% max.
Load Regulation
3
,Single………………………… ±0.5% max.
Dual ….………………………. ±1.0% max.
Transient Response
4
Single, 25% step Load Change ……..
≤250us
Ripple and Noise, 20MHz-BW
5
………...
≤25
mV RMS max.
100 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
(Hiccup, automatic recovery)
Over Temperature Shutdown Point
6
……………. 105°C typ.
Minimum Load
7
……..………… No Minimum Load Required
INPUT SPECIFICATIONS
NOTES:
OUTPUT SPECIFICATIONS
GENERAL SPECIFICATIONS
Isolation Voltage(Input to Output) ……………...… 1600VDC
Isolation Resistance …………………..………….. 100 Mohm
Switching Frequency ……….………….….…… 400 KHz typ.
Operating Temperature Range,
Ambient, 20W, None Derating …………… -40°C to +70°C
With Derating …...….….………. to +105°C
Cooling …………………….………...… Free Air Convection
1. Defined at the static output regulation at 25°C, including
initial setting accuracy, Line voltage within stated limits
and load current within stated limits.
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. di/dt= 100mA/1uS, Tc= 25°C; load change= 0.5Io max. to
0.75 Io max. and 0.75 Io max. to 0.5 Io max.
5. Measured with 4.7uF ceramic Cap. and 10uF tantalum
Cap. cross to output.
6. Defined as case temperature and 3~5°C recovery
hysteresis; Non-latching shutdown protection.
7. 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.
8. Standard product is active high, active low remote On/Off
option is available, to order suffix a “N” to the model
number e.g.: UM6723V3WSN.
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
100%
70%
Ambient
-40
0
70 80 105
Temperature(°C)
Maximum case temperature must not be exceeded 105°C.
UNIVERSAL
MICROELECTRONICS
UM6700W SERIES
1
of 3
3,27TH RD., TAICHUNG INDUSTRIAL PARK,
TAICHUNG, TAIWAN, R.O.C.
TEL: 886-4-23590096 FAX: 886-4-23590129
REV.2
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