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dc2033af
DEMO MANUAL DC2033A
Description
LT6110
Cable/Wire
Drop Compensator
The DC2033A demo board features the
LT
®
6110
cable/
wire drop compensator IC. The LT6110 is a precision
high side current sense that monitors load current via a
sense resistor and converts the sense voltage to a sink-
ing or sourcing current. Using the LT6110 sourcing or
sinking current to control a regulator’s output voltage can
compensate for the voltage loss due to a cable/wire drop.
The LT6110 includes an internal sense resistor or can be
used with an external sense resistor.
The DC2033A is jumper-configurable for the LT6110 to
use the internal sense resistor, an external 25mΩ sense
resistor, or a 5.4mΩ PCB trace sense resistor. The DC2033A
default configuration is for the LT6110 to use the internal
sense resistor.
Design files for this circuit board are available at
http://www.linear.com/demo
L
, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
typical Wire Drop compensation connections
IOUT
+IN
–IN
R
IN
LT6110
V
+
V
–
RS
IMON
+
–
V
IN
I
LOAD
I
LOAD
I
IOUT
R
WIRE
(Ω)
V
LOAD
C
LOAD
DC2033 F01
FB
REGULATOR
LOAD
V
REG
R
FA
R
FB
R
G
IOUT
+IN
–IN
R
IN
LT6110
V
+
V
–
RS
IMON
+
–
V
IN
I
LOAD
I
LOAD
I
IOUT
R
WIRE
(Ω)
V
LOAD
C
LOAD
DC2033 F02
FB
REGULATOR
LOAD
+
–
R
WIRE
(Ω)
V
REG
R
FA
R
FB
R
G
Figure 1. One Cable/Wire Compensation (One Wire to a Load Sharing the Regulator’s Ground)
Figure 2. Two Cable/Wire Compensation (One Wire to a Load and One Ground Return Wire)
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