GE Industrial Solutions Austin Minilynx SMT - Manual (Page 13)

Data Sheet
September 10, 2013 Austin MiniLynx TM SMT Non-isolated Power Modules:
2.4 – 5.5Vdc input; 0.75Vdc to 3.63Vdc Output; 3A output current
LINEAGE POWER 13
Feature Descriptions (continued)
Output Voltage Programming (continued)
For example, to program the output voltage of the
Austin MiniLynx
TM module to 1.8 Vdc, Rtrim is
calculated is follows:




−
−
= 5110
7525 . 0 8 . 1
21070
Rtrim
Ω = k Rtrim 004 . 15
V
O
(+)
TRIM
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
Figure 32. Circuit configuration to program
output voltage using an external resistor.
Table 1 provides Rtrim values required for some
common output voltages.
Table 1
V
O, set
(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
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 MiniLynx
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 33 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 33. Circuit Configuration for margining
Output voltage.