UM2800 SERIES
16 to 30 Watt DC-DC Converters
♦
2:1 Input Range
♦
High-Density
♦
Remote On/Off Control
♦
Six-Sided Shield
♦
RoHS Compliant
SPECIFICATIONS
All specifications are typical at nominal line, full load and
25°C unless otherwise noted.
GENERAL SPECIFICATIONS
Efficiency …………………..…………………...... See Table
Isolation Voltage .……………….………..….... 500 VDC min.
Isolation Resistance .……………..………..... 10
8
Ohms min.
Case Grounding ......…………... Capacity Coupled to Input
Switching Frequency …………..……………..…….. 400KHz
Storage Temperature Range …………..... -55°C to +105°C
EMI/RFI ...........……………….. Six-Sided Continuous Shield
Dimensions ............……….........…....... 2.0×2.0×0.4 inches
(50.8x50.8x10.4mm)
Case Material ....……………...... Black Coated Copper With
Non-conductive Base
Operating Temperature Range,
UM280X ……………………………………. -25°C to 50°C
UM2811,UM2814,UM2821,UM2824 ……. -25°C to 55°C
UM281X,UM282X,UM283X,UM284X …... -25°C to 60°C
OUTPUT POWER
100%
A B
C
OPERATING
TEMPERATURE
(°C)
INPUT SPECIFICATIONS
Input Voltage Range,12V
1
..……….……………......… 9-18V
24V ....………..…………...…… 18-36V
48V ....…………………….….... 36-72V
Input Filter ............….………………....….........… Pi Network
OUTPUT SPECIFICATIONS
Voltage Accuracy, Single Output ..……………….. ±2% max.
Dual, +Output ....……..………. ±2% max.
-Output ...…………….... ±3% max.
Triple, +3.3V/+5V ..…..….…… ±2% max.
Auxiliaries .........…….… ±5% max.
Voltage Balance, Dual Output at Full Load
…………………................................…........….. ±2% max.
Transient Response,
Single, 25% Step Load Change ……………. < 500 u sec.
Dual, FL-1/2FL ±1% Error Band ……….....… < 500 u sec.
External Trip Adj. Range ………………………………. +10%
Ripple and Noise,20MHz BW
2
…………… 15mV RMS max.
75mV P-P max.
Triple Output (UM283X, UM284X)
Auxiliaries ….……120mV P-P max.
Short Circuit Protection ......…………….............. Continuous
Overvoltage Protection Trip Point (Zener Clamping Type)
3.3V ….….……………………………………..…….… 4.3V
5V …………………………………………….……… 6.8V
12V ………………..…………………………………. 15.0V
15V ……………………………………………….….. 18.0V
Line Regulation
3
,Singe/Dual Output …..………. ±0.5% max.
Triple Output +3.3V/+5V …..….. ±1% max.
Auxiliaries …….... ±2% max.
4
Load Regulation ,Single/Dual Output ………..….. ±1% max.
Triple Output +3.3V/+5V ……... ±2% max.
Auxiliaries …….... ±5% max.
-25
50 55 60 100
A: UM280X
B: UM2811, UM2814, UM2821, UM2824
C: UM281X, UM282X, UM283X, UM284X
NOTES
1. Start up voltage (UM280X) …………..…….……... 10-18V
2. 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.
3. Measured from high line to low line.
4. Single: from full load to 1/4 load, Dual: loaded balanced
from full load to 1/4 load, Triple: from full load to 1/10
load (UM283X, UM284X from full load to 1/4 load) with
all other outputs at rated 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
UNIVERSAL
MICROELECTRONICS
UM2800
1
3,27TH RD., TAICHUNG INDUSTRIAL PARK,
TAICHUNG, TAIWAN, R.O.C.
TEL: 886-4-23590096 FAX: 886-4-23590129
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