S48SA Datasheet, PDF (8/13 Pages) Delta Electronics, Inc. – Industry standard footprint and pin out

Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point, the
modules may be connected with an external resistor
between the TRIM pin and either the Vo+ or Vo -. The
TRIM pin should be left open if this feature is not used.
Rtrim  up  ^{69(100  Vo%) 1690}  73.1
Vo%
Ex. When trim-up +10% (5V X 1.1 = 5.5V)
Rtrim up  ^{69(100 10) 1690}  73.1  516.9
10
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
Figure 15: Circuit configuration for trim-down (decrease output
voltage)
If the external resistor is connected between the TRIM
and Vo- pins, the output voltage set point decreases.
The external resistor value required to obtain a
percentage of output voltage change △Vo% is defined
as:
Rtrim  down  ¹⁶⁹⁰ 73.1 
Vo%
Ex. When trim-down –10% (5V X 0.9 = 4.5V)
Rtrim down  ¹⁶⁹⁰ 73.1  95.9 
10
Figure 16: Circuit configuration for trim-up (increase output
voltage)
If the external resistor is connected between the TRIM
and Vo+the output voltage set point increases. The
external resistor value required to obtain a percentage
output voltage change △Vo% is defined as:
8
DS_S48SA05006_09252012