Rev. A

PSMP20 Series

20 Watts, Open Frame

Single Outputs, Isolation Class II

Medical AC/DC Switching Power Supplies

Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833

12/02/2011

603-778-2300 www.wallindustries.com Fax 603-778-9797

Page 3 of 4

MODEL SELECTION TABLE

Model Number

Input Voltage Range

Output Voltage

Output Current

Ripple & Noise

(1)

Efficiency

Output Power

PSMP-20-05

5 VDC

4A

80mVp-p

77%

20W

PSMP-20-12

12 VDC

1.66A

150mVp-p

82%

20W

PSMP-20-15

15 VDC

1.33A

150mVp-p

84%

20W

PSMP-20-24

85 ~ 264 VAC

or

125 ~ 373 VDC

24 VDC

0.84A

240mVp-p

85%

20W

NOTES

1. Ripple & noise is measured at 20MHz bandwidth by using 12" twisted pair-wire terminated with 0.1µF and 47µF

capacitors in parallel.

2. Tolerance includes set up tolerance, line regulation, and load regulation.

3. The length of the setup time is measured a first cold start. Turning the power supply ON and OFF very quickly may lead

to an increase in the setup time.

4. The power supply is considered a component which will be installed into final equipment. The final equipment must be

re-confirmed that it still meets EMC directives.

BLOCK DIAGRAM

I/P

EMI

FILTER

RECTIFIERS

&

FILTER

POWER

SWITCHING

PWM

CONTROL

RECTIFIERS

&

FILTER

DETECTION

CIRCUIT

+V

-V

DERATING CURVE

85

Ta=25°C

100

110

120

264

40

50

60

70

80

Load vs Input Voltage

Input Voltage (VAC)

90

100

-20

Ambient Temperature (°C)

0

10203040506070

20

40

60

80

100

Load vs Temperature

rated output voltage, 100% load, 115-230VAC