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UCC39002

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Advanced 8 pin load share controller, 0°C to 70°C

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Data sheet

UCC39002

ACTIVE
Data sheet Order now

Product details

Vin (max) (V) 14.25 Operating temperature range (°C) 0 to 70 Control mode Current Topology Buck, Flyback Rating Catalog Features 1% accuracy, Intel SSI load share specification compliant, Load Sharing, high-side or Low-side current sense
Vin (max) (V) 14.25 Operating temperature range (°C) 0 to 70 Control mode Current Topology Buck, Flyback Rating Catalog Features 1% accuracy, Intel SSI load share specification compliant, Load Sharing, high-side or Low-side current sense
PDIP (P) 8 92.5083 mm² 9.81 x 9.43 SOIC (D) 8 29.4 mm² 4.9 x 6 VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • High accuracy; capable of < 1% current-share error at full load
  • High-side or low-side (GND-referenced) 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 VSSOP package minimizes space
  • Lead-free assembly
  • High accuracy; capable of < 1% current-share error at full load
  • High-side or low-side (GND-referenced) 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 VSSOP package minimizes space
  • Lead-free assembly

The UCC29002 device family comprises advanced, high-performance, low-cost load-share controllers that provide 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 UCC29002 is based on the automatic leader/follower architecture of predecessor UC3902 and UC3907 load-share controllers. The device is capable of 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. With an amplifier common-mode range of 0V to the VDD 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 UCC29002 device family comprises advanced, high-performance, low-cost load-share controllers that provide 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 UCC29002 is based on the automatic leader/follower architecture of predecessor UC3902 and UC3907 load-share controllers. The device is capable of 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. With an amplifier common-mode range of 0V to the VDD 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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Technical documentation

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Type Title Date
* Data sheet UCC29002 and UCC39002 Advanced 8-Pin Load-Share Controller datasheet (Rev. J) PDF | HTML 04 Apr 2017
White paper Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) PDF | HTML 30 Apr 2024
More literature Design review of a 2-kW parallelable power supply module 17 Aug 2016
More literature Design review of a 2-kW parallelable power supply module (PPT) 17 Aug 2016
Application note Synchronizing Three or More UCC28950 Phase-Shifted, Full-Bridge Controllers 13 Sep 2011
Application note Pre-biased Output Voltage Startup Operation of the UCC28950 01 Aug 2011
Application note Current Sharing in Redundant Systems 08 Jan 2010
User guide Using The UCC39002 With 3 PT4484 Modules (PR042 (Rev. B) 29 Jul 2009
Application note Load-Sharing TPS40050 Modules Using the UCC39002 Load-Share Controller 13 Apr 2004
User guide UCC39002 Advanced Load-Share Controller User's Guide, HPA027A (Rev. A) 09 Feb 2004
More literature 2003 Power Seminar - Paralleling Power 14 Jul 2003
Application note 48-VIN, 12-VOUT Loadshare System Using the UCC39002 with Three DC-DC Modules (Rev. A) 14 Feb 2003
Application note U-163 The UC3902 Load Share Controller and its Performance in Distributed Power (Rev. A) 13 Dec 2002
More literature Seminar 800 Topic 2 - Load Sharing With Paralleled Power Supplies 15 Feb 2001
Application note U-129 UC3907 Load Share IC Simplifies Parallel Power Supply Design 05 Sep 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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 (...)

User guide: PDF
Not available on TI.com
Calculation tool

SLUC045 — MathCAD 2000 for Designing with UCC29002 Load Share Controller

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
UCC29002 — Advanced 8 pin load share controller, -40°C to 105°C UCC39002 — Advanced 8 pin load share controller, 0°C to 70°C
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Calculation tool

SLUC684 — UCC29002 Excel Calculator Tool

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
UCC29002 — Advanced 8 pin load share controller, -40°C to 105°C UCC39002 — Advanced 8 pin load share controller, 0°C to 70°C
Download
Gerber file

Gerber Files for UCC39002 and UCC29002

SLUC019.ZIP (129 KB)
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Reference designs

PMP8906 — Isolated CCM Flyback producing 12V@10A Reference Design

The following design is a 60W Flyback which uses the UCC3809 and the UCC39002. It creates a 12V@10A output by employing dual 12V@5A. The system functions in the continuous conduction mode.
Test report: PDF
Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
VSSOP (DGK) 8 View options
TI's Standard Terms and Conditions for Evaluation Items apply.

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