GE Industrial Solutions Austin SuperLynx SIP - Manual (Page 13)

Data Sheet
October 2, 2009 Austin SuperLynx TM SIP Non-isolated Power Modules:
3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 16A output current
LINEAGE POWER 13
Feature Descriptions (continued)
V
O
(+)
TRIM
GND
V
t rim
LOAD
V
IN
(+)
ON/OFF
+
-
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 external voltage source, Vtrim for the same common
output voltages.
Table 1
V
O,
(V) Rtrim (KΩ)
0.7525 Open
1.2 41.973
1.5 23.077
1.8 15.004
2.5 6.947
3.3 3.160
Table 2
V
O, set
(V) Vtrim (V)
0.7525 Open
1.2 0.6240
1.5 0.5731
1.8 0.5221
2.5 0.4033
3.3 0.2670
By a using 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.
Voltage Margining
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
Austin Lynx or
Lynx II Series
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 31. Circuit Configuration for margining
Output voltage.
Remote Sense
The Austin SuperLynx TM SIP power modules have a
Remote Sense feature to minimize the effects of
distribution losses by regulating the voltage at the
Remote Sense pin (See Figure 32). The voltage
between the Sense pin and Vo pin must not exceed
0.5V.
The amount of power delivered by the module is defined
as the output voltage multiplied by the output current
(Vo x Io). When using Remote Sense the output
voltage of the module can increase, which if the same
output is maintained, increases the power output by the
module. Make sure that the maximum output power of
the module remains at or below the maximum rated
power. When the Remote Sense feature is not being
used, connect the Remote Sense pin to the output pin
of the module.