Product details

Topology Flyback, Buck Supply voltage (Max) (V) 13.5 Features Load Sharing, high-side or Low-side current sense, 1% accuracy, Intel¨ SSI load share specification compliant Operating temperature range (C) -40 to 105
Topology Flyback, Buck Supply voltage (Max) (V) 13.5 Features Load Sharing, high-side or Low-side current sense, 1% accuracy, Intel¨ SSI load share specification compliant Operating temperature range (C) -40 to 105
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • 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
  • 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

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, RSHUNT, can be placed in either the GND return path or in the positive output rail of the power supply.

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, RSHUNT, can be placed in either the GND return path or in the positive output rail of the power supply.

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Design & development

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Evaluation board

UCC39002EVM — UCC39002 Evaluation Module

The UCC39002 is an advanced, high-performance load-share controller that provides all the necessary functions to parallel multiple independent power supplies or dc-to-dc modules. This load-share circuit is based upon the automatic master/slave architecture utilized in the UC3902 and UC3907 (...)

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Gerber file

Gerber Files for UCC39002 and UCC29002

SLUC019.ZIP (129 KB)
Gerber file

UCC29002 Excel Calculator Tool

SLUC684.ZIP (109 KB)
Reference designs

PMP10099 — Reverse Power Supply - Eight Inputs One Output Reference Design

This reference design is a power solution for reverse-powered telecom applications. Up to eight isolated inputs provide one common output; the load is shared equally between all active converters.
Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
VSSOP (DGK) 8 View options

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