UCC29002DR Datasheet, PDF (1/28 Pages) Texas Instruments – ADVANCED 8-PIN LOAD-SHARE CONTROLLER

UCC29002
UCC29002/1
UCC39002
SLUS495H − SEPTEMBER 2001 − REVISED AUGUST 2007
ADVANCED 8ĆPIN
LOADĆSHARE CONTROLLER
FEATURES
D High Accuracy, Better Than 1% CurrentShare
Error at Full Load
D High-Side or Low-Side (GND Reference)
Current-Sense Capability
D Ultra-Low Offset Current Sense Amplifier
D Single Wire Load Share Bus
D Full Scale Adjustability
D Intel^ SSI LoadShare Specification Compliant
D Disconnect from Load Share Bus at Stand-By
D Load Share Bus Protection Against Shorts to
GND or to the Supply Rail
D 8-Pin MSOP Package Minimizes Space
D Lead-Free Assembly
SYSTEM CONFIGURATIONS
D Modules With Remote Sense Capability
D Modules With Adjust Input
D Modules With Both Remote Sense and Adjust
Input
D In Conjunction With the Internal Feedback E/A
of OEM Power Supply Units
DESCRIPTION
The UCC39002 is an advanced, high performance and
low cost loadshare controller that provides all
necessary functions to parallel multiple independent
power supplies or dc-to-dc modules. Targeted for high
reliability applications in server, workstation, telecom
and other distributed power systems, the controller is
suitable for N+1 redundant systems or high current
applications where off-the-shelf power supplies need to
be paralleled.
The BiCMOS UCC39002 is based on the automatic
master/slave architecture of the UC3902 and UC3907
load share controllers. It provides better than 1%
current share error between modules at full load by
using a very low offset post-package-trimmed
current-sense amplifier and a high-gain negative
feedback loop. And with the amplifier’s common mode
range of 0-V to the supply rail, the current sense
resistor, R_SHUNT, can be placed in either the GND return
path or in the positive output rail of the power supply.
TYPICAL LOW-SIDE CURRENT SENSING APPLICATION
V+
S+
POWER
SUPPLY
WITH
REMOTE
SENSE
S−
RSHUNT
V−
UCC39002
1 CS− CSO 8
2 CS+
LS 7
3 VDD EAO 6
4 GND ADJ 5
RADJ
LOAD
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
www.ti.com
Copyright  2007, Texas Instruments Incorporated
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