GE Industrial Solutions 12V Austin SuperLynx 16A - Manual (Page 13)

GE
Data Sheet
12V Austin SuperLynx TM 16A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 16A Output Current
May 7, 2013 ©2013 General Electric Company. All rights reserved. Page 13
Feature Descriptions (continued)
Output Voltage Programming (continued)
V
O
(+)
TRIM
GND
V
t rim
LOAD
V
IN
(+)
ON/OFF
+
-
Figure 29. Circuit Configuration for programming Output
voltage using external voltage source.
Table 1 provides Rtrim values for some common output
voltages, while Table 2 provides values of the external
voltage source, Vtrim for same common output voltages.
Table 1
V
O, set
(V) Rtrim (KΩ)
0.7525 Open
1.2 22.46
1.5 13.05
1.8 9.024
2.5 5.009
3.3 3.122
5.0 1.472
Table 2
V
O, set
(V) Vtrim (V)
0.7525 Open
1.2 0.670
1.5 0.650
1.8 0.630
2.5 0.583
3.3 0.530
5.0 0.4166
By using a 1% tolerance trim resistor, set point tolerance of
±2% is achieved as specified in the electrical specification. The
POL Programming Tool, available at
www.lineagepower.com
under the Design Tools section, helps determine the required
external trim resistor needed for a specific output voltage.
The amount of power delivered by the module is defined as the
voltage at the output terminals multiplied by the output current.
When using the trim feature, the output voltage of the module
can be increased, which at the same output current would
increase the power output of the module. Care should be taken
to ensure that the maximum output power of the module
remains at or below the maximum rated power (P
max
= V
o,set
x
I
o,max
).
Voltage Margining
Output voltage margining can be implemented in the Austin
SuperLynx
TM 12V SMT modules by connecting a resistor, R
margin-
up
, from the Trim pin to the ground pin for margining-up the
output voltage and by connecting a resistor, R
margin-down
, from
the Trim pin to the Output pin for margining-down. Figure 30
shows the circuit configuration for output voltage margining.
The POL Programming Tool, available at
www.lineagepower.com under the Design Tools section, also
calculates the values of R
margin-up
and R
margin-down
for a specific
output voltage and % margin. Please consult your local GE
technical representative for additional details.
Vo
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 30. Circuit Configuration for margining Output
voltage.