GE Industrial Solutions 2A DLynx - Manual (Page 15)

GE Energy
Datasheet
2A DLynx TM : Non-Isolated DC-DC Power Modules
3Vdc –14Vdc input; 0.6Vdc to 5.5Vdc output; 2A Output Current
June 24, 2013 ©2012 General Electric Company. All rights reserved. Page 15
( )
Ω






−
= k
Vo
Rtrim
6 . 0
0 . 6
Rtrim is the external resistor in kΩ
Vo is the desired output voltage.
Table 1 provides Rtrim values required for some common
output voltages.
Table 1
V
O, set
(V) Rtrim (KΩ)
1.0 15
1.2 10
1.5 6.67
1.8 5
2.5 3.16
3.3 2.22
5.0 1.36
By using a ±0.5% tolerance trim resistor with a TC of ±100ppm,
a set point tolerance of ±1.5% can be achieved as specified in
the electrical specification.
Remote Sense
The 12V DLynx TM 2A power modules have a Remote Sense
feature to minimize the effects of distribution losses by
regulating the voltage at the SENSE pin. The voltage between
the SENSE pin and VOUT pin must not exceed 0.5V. Note that
the output voltage of the module cannot exceed the specified
maximum value. This includes the voltage drop between the
SENSE and Vout pins. When the Remote Sense feature is not
being used, connect the SENSE pin to the VOUT pin.
V
O
(+)
TRIM
GND
R
trim
LOAD
V
IN
(+)
ON/OFF
SENSE
Figure 46. Circuit configuration for programming output
voltage using an external resistor.
Voltage Margining
Output voltage margining can be implemented in the 12V
DLynx
TM 2A 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 output pin for margining-down. Figure 10 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 GE Energy technical
representative for additional details.
Vo
MODULE
GND
Trim
Q1
Rtrim
Rmargin-up
Q2
Rmargin-down
Figure 47. Circuit Configuration for margining Output
voltage.