Data Sheet
HW/HC004/005/006 Series DC-DC Power Module:
May 16, 2008
18-36Vdc & 36-75Vdc Input; 1.0V-5Vdc Output; 4A - 6A Output Current
Feature Descriptions (continued)
The relationship between the output voltage and the trim
resistor value for a Δ% reduction in output voltage is:
Rtrim-down = 249.39 kΩ
Nominal 5V, 3.3V, 2.5V, 2.0V, 1.8V, & 1.5V modules:
511
To trim up the output of a nominal 3.3V module
(HW005A0F) to 3.63V
Δ% = 10
Rtrim-down
=
- 6.11 kΩ
Δ%
5.11x3.3(100+10)
1.225x10
511
Nominal 1.2V module:
Rtrim-up
=
-
- 6.11 kΩ
10
346
Rtrim-down
Nominal 1.0V module:
Rtrim-down
=
- 4.46 kΩ
Rtrim-up =94.2 kΩ
Δ%
390
=
- 4.90 kΩ
Δ%
Connecting an external resistor (Rtrim-up) between the
TRIM pin and the VO(+) pin increases the output voltage
set point. To maintain set point accuracy, the trim
resistor tolerance should be ±0.5%.
The relationship between the output voltage and the trim
resistor value for a Δ% increase in output voltage is:
Nominal 5V, 3.3V, 2.5V, 2.0V, 1.8V, & 1.5V modules:
511
5.11VO(100+Δ%)
1.225Δ%
Rtrim-up
=
-
-
- 6.11 kΩ
- 4.46 kΩ
Δ%
Nominal 1.2V module:
346
5.11VO(100+Δ%)
1.225Δ%
Rtrim-up
=
Δ%
Nominal 1.0V module:
390
5.11VO(100+Δ%)
1.225Δ%
Rtrim-up
=
-
- 4.90 kΩ
Δ%
(VO refers to the nominal output voltage, i.e. 5.0V for VO
on an HW004A0A. Δ% is the required % change in
output voltage, i.e. to trim a 5.0V module to 5.10V the
Δ% value is 2).
Examples:
To trim down the output of a nominal 5.0V module
(HW004A0A) to 4.90V
Δ% = 2
511
Rtrim-down
=
- 6.11 kΩ
2
LINEAGE POWER
18
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
