Data Sheet
Austin SuperLynxTM 12V SMT Non-isolated Power Modules:
10 – 14Vdc input; 0.75Vdc to 5.5Vdc Output; 16A output current
April 8, 2008
The amount of power delivered by the module is defined
Feature Descriptions (continued)
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 (Pmax = Vo,set x Io,max).
Output Voltage Programming (continued)
VIN(+)
VO(+)
TRIM
ON/OFF
Voltage Margining
LOAD
Output voltage margining can be implemented in the
Austin SuperLynxTM 12V SMT modules by connecting a
resistor, Rmargin-up, from the Trim pin to the ground pin for
margining-up the output voltage and by connecting a
resistor, Rmargin-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 Rmargin-up and Rmargin-down for a specific output
voltage and % margin. Please consult your local
Lineage Power technical representative for additional
details.
+
-
rim
t
V
GND
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
VO, set (V)
0.7525
1.2
Rtrim (KΩ)
Open
Vo
Rmargin-down
22.46
1.5
13.05
Austin Lynx or
Lynx II Series
1.8
9.024
Q2
2.5
5.009
3.3
3.122
Trim
5.0
1.472
Rmargin-up
Rtrim
Table 2
VO, set (V)
0.7525
1.2
Vtrim (V)
Open
Q1
0.670
GND
1.5
0.650
1.8
0.630
Figure 30. Circuit Configuration for margining Output
voltage.
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.
LINEAGE POWER
13