UCC29002_16 Datasheet, PDF (1/30 Pages) Texas Instruments – Advanced 8-Pin Load-Share Controller

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UCC29002, UCC29002-1, UCC39002
SLUS495I – SEPTEMBER 2001 – REVISED MAY 2016
UCC2900x, UCC39002 Advanced 8-Pin Load-Share Controller
1 Features
•1 High Accuracy, Better Than 1% Current Share
Error at Full Load
• High-Side or Low-Side (GND Reference) Current-
Sense Capability
• Ultra-Low Offset Current Sense Amplifier
• Single Wire Load Share Bus
• Full Scale Adjustability
• Intel^® SSI Load Share Specification Compliant
• Disconnect from Load Share Bus at Stand-By
• Load Share Bus Protection Against Shorts to GND
or to the Supply Rail
• 8-Pin MSOP Package Minimizes Space
• Lead-Free Assembly
2 Applications
• Modules With Remote-Sense Capability
• Modules With Remote-Sense Capability
• Modules With Remote-Sense Capability
• In Conjunction With the Internal Feedback E/A of
OEM Power Supply Units
3 Description
The UCC39002 device is an advanced, high-
performance, and low-cost load share 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 must be paralleled.
The BiCMOS UCC39002 is based on the automatic
master or slave architecture of the UC3902 and
UC3907 load share controllers. The device 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
UCC29002
SOIC (8)
4.90 mm × 3.91 mm
UCC29002-1
VSSOP (8)
3.00 mm × 3.00 mm
UCC39002
PDIP (8)
9.81 mm × 6.35 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
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
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.