LM5080 Datasheet, PDF (1/13 Pages) National Semiconductor (TI) – Modular Current Sharing Controller

January 2006
LM5080
Modular Current Sharing Controller
General Description
The LM5080 is a simple and cost effective load share con-
troller that provides all functions required to balance the
currents delivered from multiple power converters operated
in parallel. The LM5080 implements an average program
(AP) method of active load share control which adjusts the
output voltage of individual power stages either up or down
to deliver nearly equal currents to a common load. The
average program method improves stability and reduces the
output voltage tolerance when compared to other common
load sharing methods. The LM5080 supports two common
applications for load share controllers: external control in
which the load share circuit balances currents between
separate power modules (bricks), and internal control where
the load share circuit is integrated into the voltage regulation
loop of each power converter module or circuit.
Features
n Average program current share method
n Single-wire star link current share bus
n No precision external resistors necessary
n 3V to 15V bias voltage range
n Adaptable for high or low side current sensing
n Flexible architecture allows 4 modes of operation:
Negative remote sense adjustment
Positive remote sense adjustment
Trim or reference adjustment
Feedback divider adjustment
Packages
n MSOP-8
n RoHS compliant Pb free available
LM5080 Typical Application
Remote Sense Adjust Mode
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© 2006 National Semiconductor Corporation DS201578
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