CORPORATION
•41920 Christy Street
•Fremont, California
•94538-3158
•510-657-2635
Fax: 510-657-6634
sales@digipwr.com
www.digipwr.com
US50 Series
Universal Input
50 Watt
Switchers
•75% typical efficiency
•EN55022-A conducted
•Up to 4 outputs
•Compact 5.0” x 3.0” x 1.2”
size
•UL, cUL, TUV and CE
•Available with 12Vdc, 24Vdc
and 48Vdc input
The US50 series are economical, high efficiency open frame
switchers that deliver up to 50W continuous9or 60W peak
power from one to four outputs. The 90-250Vac universal
input allows them to be used worldwide.
The US50 is one of the flexibility series. In addition to the
models listed on this sheet, many potential models are
available that include full safety agency approval and do not
require any non-recurring engineering (NRE) charge. Prototype
delivery is just a few weeks.
Flexibility options include an isolated V4 output. Output
voltage options are given in the table below. Models with
EN55022-B conducted emissions and fully custom models are
also available. Contact the factory for details.
US50 models are also available with 12Vdc, 24Vdc or 48Vdc
inputs. Please see the DP50 Series data sheet for details.
Specifications are subject to change without prior notice.
Output Current Ratings
Model Output
Number Output Voltage Min1Max2Max3(Im)Peak4
US50-105 V1
15V 0.1A 6A 10A 11A
US50-112 V1
12V 0.1A 3.3A 4.2A 4.6A
US50-124 V1
24V 0.1A 1.6A 2A 2.3A
US50-201 V1
15V 0.1A 3A 5A 7A
V2
12V 0A 2A 2A 3A
US50-301 V1
15V 0.1A 4A 4A 7A
V2
12V 0A 1A 2A 5A
V3
12V 0A 1A 1A 2A
US50-303 V1
15V 0.1A 4A 5A 7A
V2
15V 0A 1.5A 3A 5A
V3
15V 0A 1A 2A 2A
US50-401 V1
15V 0.1A 2A 4A 5A
V2
12V 0A 2A 2A 3A
V3
12V 0A 0.5A 1A 1A
V4
15V 0A 0.5A 0.5A 1A
Modified standard V1
2.5 to
48V66A 10A
flexibility output V2
2 to
48V72A 3A
options5V3
2 to
48V71A 2A
V4
2 to
48V71A 2A
Notes:
1At least 20% of maximum output current (Im)
is required to maintain stated regulation. Supply
remains on at zero load, but regulation is not
guaranteed.
2Convection cooling, 40W maximum9
3Forced air cooling, 50W maximum9
4Peak output, 30 sec max
5The US50 series allows very fast flexible
modified standard designs within these
parameters without non-recurring engineering
charges and while retaining safety agency
approvals. Please contact the factory for
details.
6Can be specified in 0.1V increments
7Can be specified in 0.75V increments
8Operational extremes per safety agency testing
9Under certain input, output and/or cooling
conditions, maximum continuous output power
may be as high as 50W with convection cooling
and 60W with forced air cooling. Please contact
the factory for details.
Available Models
flexibility
SERIES
Parameter Limits
Input
Input Voltage Range 90-250 Vac rated
81-265 Vac operation8
Input Frequency 47 to 63Hz
Input Operating Current 1.2A rms @ 90Vac input, 50W output
Input Surge Current 25A max, cold start @ 25˚C, 250Vac
Efficiency 75% typ @ 115Vac input, full power
Output
Output Power 40W, natural convection cooling9
50W with 28CFM forced air cooling9
60W peak
Line Regulation
0.2%, Vin(min) to Vin(max)
Load Regulation
3% (V1, 20% to 100% Im)
5% (V2, V3, V4, 20% to 100% Im)
Cross Regulation
0.5% (V1, 20% to 100% Imon V2-V4)
5% (V2, V3, V4, 50% to 100% Imon V1)
Noise and Ripple 25mV max RMS, 50mV max P-P, on V1 with
full load
0.5% max RMS, 1% max P-P, on V2, V3, V4,
with full load
Parameter Limits
Output (cont’d)
Power-up Overshoot 5% max, all outputs
Transient Response V1, for 25% to 75% Imchange, 5% max
deviation, with recovery to 1% within 250µS
Hold-up time 8mS min @ 115Vac input, 50W output
Overvoltage Protection Threshold 130% typical of Vout, all outputs
Power Limit Point 130% typical of max rated power
Environmental
Operating Temperature Range 0°C to 50°C
(full power)
Operating Temperature Range 0°C to 70°C Derate linearly from full
(extended range) power at +50°C to half power at +70°C
Storage Temperature Range -25°C to +85°C
Relative Humidity Range 5% to 95%, non-condensing
Vibration 0.75G peak, 5Hz to 500Hz. Test three
orthogonal axis at 1 octave/min, 5 min dwell at
four major resonances
MTBF 280,000 hours typical calculated per MIL STD
217F at 30°C ambient
Weight 0.55 lb. (0.25 kg)
Specifications are typical at 25°C unless otherwise designated.
LINE 32A/250VAC
J1
GND
NEUT.
1
2F1 FUSE
RETURN (V1,V2,V3)
.225
J2
8
1
V2
V1
V3
V4
V4
DIMENSIONS
.09
(2.29)
5.00
(127.00)
4.550
(115.57)
2.550
(5.72)
R20
VOLTAGE
ADJUST
TOLERANCE
.XX ±.03 (.76)
.XXX ±.015 (.38)
J1 CONNECTOR=MOLEX INC., 41671 SERIES, P/N
(MATING CONNECTOR=MOLEX INC., 6442 SERIES (OR 41695 SER
P/N: 26-03-4050 (OR 09-50-8051))
J2 CONNECTOR=MOLEX INC., 41671 SERIES, P/N 26-48-1085
(MATING CONNECTOR=MOLEX INC., 6442 SERIES (OR 41695 SER
INCHES (MM)
.150 (3.81) DIA, 4PLS.
1.20 (30.48)
MAX
3.00
(76.20)
(64.77)
.225
(5.72)
P/N: 08-52-0113 OR 08-52-0112)
(MATING CRIMP TERMINALS=MOLEX INC., 6838 SERIES,
P/N: 26-03-4081 (OR 09-50-8081))
CORPORATION
•41920 Christy Street
•Fremont, California
•94538-3158
•510-657-2635
Fax: 510-657-6634
sales@digipwr.com
www.digipwr.com
flexibility
SERIES
Specifications
DP0201.01US
Digital Power Corporation 41920 Christy Street, Fremont, CA 94538-3158
sales@digipwr.com www.digipwr.com PH 510-657-2635 FAX 510-657-6634
