Data Sheet
August 12, 2008
Austin Superlynx
TM
SMT Non-isolated Power Modules:
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
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
).
LOAD
Feature Descriptions
(continued)
V
IN
(+)
V
O
(+)
ON/OFF
TRIM
Voltage Margining
+
-
V
t
rim
GND
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.
Output voltage margining can be implemented in the
Austin SuperLynx
TM
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 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 R
margin-up
and R
margin-down
for a specific output
voltage and % margin. Please consult your local Lineage
Power technical representative for additional details.
Vo
Table 1
V
O, set
(V)
0.7525
1.2
1.5
1.8
2.5
3.3
Rtrim (KΩ)
Open
41.973
23.077
15.004
6.947
3.160
Rmargin-down
Austin Lynx or
Lynx II Series
Q2
Trim
Rmargin-up
Rtrim
Table 2
V
O, set
(V)
0.7525
1.2
1.5
1.8
2.5
3.3
Vtrim
(V)
Open
0.6240
0.5731
0.5221
0.4033
0.2674
Figure 31. Circuit Configuration for margining Output
voltage.
GND
Q1
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 ]
