UM1500 1 OF 2 REV.4
U
MEC
I
NTERNATIONAL
3
2539 W. 237TH STREET, SUITE A
T
ORRANCE, CA 90505
TEL:
(310) 326-7072 FAX: (310) 326-7058
UM1500 SERIES
15 to 20 Watt DC-DC Converters
Surface Mount Technology
Efficiency 82%
Wide Input Range
10.2 Watt/Cubic Inch
Remote On/Off Control
Low Profile
SPECIFICATIONS
All specifications are typical at nominal line, full load and
25C unless otherwise noted.
INPUT SPECIFICATIONS
Input Voltage Range,
15W ................................. 48V Nominal, 18-72 VDC
20W ................................. 24V Nominal, 18-36 VDC
48V Nominal, 36-72 VDC
Input Filter ................................................. Pi Network
OUTPUT SPECIFICATIONS
Voltage Accuracy, Single Output ......................1% max.
Dual,+Output ....................... 1% max.
-Output ...................... 2% max.
Triple, 5V ........................... 1% max.
12V/15V ................... 3% max.
Voltage Balance, Dual Output at Full Load
............................................................ 2.0% max.
Transient Response,
Single, Dual , 25% Step Load Change,
1% Error Band ........................................ <500u sec.
External Trim Adj. Range ..................................... +10%
Ripple and Noise , 20MHz BW
1
.............. 15mV RMS max.
75mV P-P max.
Temperature Coefficient ...................... 0.02/C max.
Short Circuit Protection ................................ Continuous
Overvoltage Protection Trip Point ( Zener Clamp Type )
5V ................................................................ 6.8V
12V ................................................................. 15V
15V ................................................................. 18V
Line Regulation
2
, Single/Dual Output .............. 0.5% max.
Triple Output .......................... 1% max.
Load Regulation
3
,Single Output ...................... 0.5% max.
Dual Output ......................... 1% max.
Triple Output +5V ................. 1% max.
Auxiliaries ........ 5% max.
GENERAL SPECIFICATIONS
Remote On/Off Control ................................ See Below
Efficiency .................................................... See Table
Isolation Voltage ..................................... 500 VDC min.
Isolation Resistance ................................ 10
8
ohms min.
Switching Frequency
Single/Dual ............................................. 330KHz typ.
Triple .................................................... 200KHz typ.
Operating Temperature Range,
Ambient, 15W,None Derating .................. -40C to +71C
20W, None Derating ................. -40C to +60C
Cooling .......................................... Free Air Convection
Storage Temperature Range .................. -55C to +105C
Dimensions Case J .......................... 2.0x1.6x0.46 Inches
(50.8x40.6x11.7 mm)
Case Material ........................ Black Coated Copper With
Non-Conductive Base
Weight ............................................................... 50g
NOTES:
1. Measured with 3.3uF/25V tantalum capacitor across
each output for triple output models,0.1uF ceramic
capacitor across each output for single and dual output
models.
2. Measured from high line to low line.
3. Measured from full load to specified load with all other
outputs at rated load: singe: full load to 1/4 load; dual
outputs loaded balanced from full load to 1/2 load, triple:
full load to 1/10 load.
REMOTE ON/OFF CONTROL
Control Input ............................................... Pin 1
Control Common ......................................... Pin 3
Logic Compatibility.............................................
........................... CMOS or Open Collector TTL
Control Voltage...................................................
On ............................ >+2.5 VDC or Open Circuit
Off ....................... < +0.8 VDC or Jumper to Pin 3
Converter Shutdown Idle Current .................. 10 mA
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