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OUTPUT VOLTꢀGE ꢀDJUSTMENT (1500 SERIES SINGLE OUTPUT)
The converter’s output voltage may be trimmed to 10% of the nominal output voltage.
TRIM UP
Trim output voltage up by connecting an external resistor between Pins 5 and 6. Use the following equation.
Reference Table 1 for variable ꢀ.
ꢀ
Δ %
- 24 (ꢁΩ)
Radj-up =
Example:
If we want to trim 5% up for 12V output units,
where ꢀ = 1.98, Δ % = 0.05
1.98
0.05
- 24 ꢁΩ = 15.6 ꢁΩ
Radj-up =
CASE A
Output Voltage
ꢀ
Table 1.
3.3V
5V
12V
15V
0.78
1.24
1.98
2.07
TRIM DOWN
Trim output voltage down by connecting an external resistor between Pins 5 and 7. Use the following
equation. Reference Table 2 for variable C and D.
C
Δ %
- D (ꢁΩ)
Radj-down =
Example:
If we want to trim 4% down for 5V output units,
where C = 1.24, D = 26.5, Δ % = 0.04
1.24
0.04
- 26.5 ꢁΩ = 4.5 ꢁΩ
Radj-down =
CASE A
Output Voltage
C
D
Table 2.
3.3V
5V
12V
1.22
1.24
7.57
26
26.5
33.5
15V
10.3
36.4
>> B-118
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