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SPS10A-001 Wallmount Power Supply - How to modify ???

T

The Analog Kid

Jan 1, 1970
0
Anyone know how to modify this power supply for different voltages?
There's no potentiometer on the board.

AC ADAPTER
MODEL : SPS10A-001 (TSA-0285)
INPUT : 100-120VAC 50/60Hz 1.0A MAX
OUTPUT : 3.0 - 36VDC 3.0-0.41A 15W MAX
PRESET : 5.0VDC 2.0A
I.T.E POWER SUPPLY
MADE IN THAILAND
 
M

monzo

Jan 1, 1970
0
Anyone know how to modify this power supply for different voltages?
There's no potentiometer on the board.

AC ADAPTER
MODEL : SPS10A-001 (TSA-0285)
INPUT : 100-120VAC 50/60Hz 1.0A MAX
OUTPUT : 3.0 - 36VDC 3.0-0.41A 15W MAX
PRESET : 5.0VDC 2.0A
I.T.E POWER SUPPLY
MADE IN THAILAND

Here is how to modify the output voltage:
You need to vary the values of R19 and R20. This is a voltage divider tha
feeds 2.51 volts back to the sense element. These resistors are on th
secondary side.
For the 5 volt units R19 is 10.7 K and R20 is 10.0K
R20 goes to ground and R19 goes to the positive output. Select R19 and R2
to divide down the required output voltage to 2.51 volts.
D7 is a 5.6 volt Zener diode on the output and must be removed if you mak
the output voltage higher than 5.5 volts.

By the way, the regulator is the UC3842.

Good Luck
 
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