Data Sheet
Austin SuperlynxTM SMT Non-isolated Power Modules:
August 12, 2008
3.0 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 16A output current
The amount of power delivered by the module is defined
as the voltage at the output terminals multiplied by the
Feature Descriptions (continued)
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).
VIN(+)
VO(+)
ON/OFF
LOAD
TRIM
Voltage Margining
+
-
trim
V
Output voltage margining can be implemented in the
Austin SuperLynxTM modules by connecting a resistor,
Rmargin-up, from the Trim pin to the ground pin for
GND
margining-up the output voltage and by connecting a
resistor, Rmargin-down, from the Trim pin to the Output pin
for margining-down. Figure 31 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.
Figure 30. Circuit Configuration for programming
Output voltage using external voltage source.
Table 1 provides Rtrim values required for some common
output voltages, while Table 2 provides values of the
external voltage source, Vtrim for the same common
output voltages.
Vo
Table 1
VO, set (V)
0.7525
1.2
Rtrim (KΩ)
Open
Rmargin-down
Austin Lynx or
Lynx II Series
41.973
23.077
15.004
6.947
1.5
Q2
1.8
Trim
2.5
Rmargin-up
3.3
3.160
Rtrim
Table 2
VO, set (V)
0.7525
1.2
Vtrim (V)
Open
Q1
GND
0.6240
0.5731
0.5221
0.4033
0.2674
1.5
Figure 31. Circuit Configuration for margining Output
voltage.
1.8
2.5
3.3
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
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
