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O
UTPUT
V
OLTAGE
A
DJUSTMENT
(1500 S
ERIES
S
INGLE
O
UTPUT
)
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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 A.
Radj-up =
Example:
A
Δ
%
- 24 (kΩ)
If we want to trim 5% up for 12V output units,
where A = 1.98,
Δ
% = 0.05
Radj-up =
1.98
0.05
- 24 kΩ
=
15.6 kΩ
CASE A
Table 1.
Output Voltage
A
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.
Radj-down =
Example:
C
Δ
%
- D (kΩ)
If we want to trim 4% down for 5V output units,
where C = 1.24, D = 26.5,
Δ
% = 0.04
Radj-down =
1.24
0.04
- 26.5 kΩ
=
4.5 kΩ
CASE A
Table 2.
Output Voltage
C
D
3.3V
5V
12V
15V
1.22
1.24
7.57
10.3
26
26.5
33.5
36.4
>> B-118
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