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O
UTPUT
V
OLTAGE
T
RIM
(1500UR S
ERIES
, S
INGLE OUTPUT ONLY
)
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The converter’s output voltage may be trimmed to
±5%
of the nominal output voltage.
TRIM UP
Trim output voltage up by connecting an external resistor between Pins 4 and 5. 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 = 1.97,
Δ
% = 0.05
Radj-up =
1.97
0.05
- 24 kΩ
=
15.4 kΩ
Table 1.
Output Voltage
A
3.3V
5V
12V
15V
0.75
1.25
1.97
2.07
TRIM DOWN
Trim output voltage down by connecting an external resistor between Pins 3 and 4. Use the following
equation. Reference Table 2 for variable C and D.
Radj-down =
Example:
C
Δ
%
- D (kΩ)
If we want to trim 2% down for 5V output units,
where C = 1.25, D = 26.5,
Δ
% = 0.02
Radj-down =
1.25
0.02
- 26.5 kΩ
=
36 kΩ
Table 2.
Output Voltage
C
D
3.3V
5V
12V
15V
1.25
1.25
7.55
10.3
26
26.5
33.5
36.4
>> B-140
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