SLUS495I September   2001  – May 2016 UCC29002 , UCC39002

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Differential Current Sense Amplifier (CS+, CS−, CSO)
      2. 7.3.2  Load Share Bus Driver Amplifier (CSO)
      3. 7.3.3  Load Share Bus Receiver Amplifier (LS)
      4. 7.3.4  Error Amplifier (EAO)
      5. 7.3.5  Adjust Amplifier Output (ADJ)
      6. 7.3.6  Enable Function (CS+, CS−)
      7. 7.3.7  Fault Protection
      8. 7.3.8  Start-Up and Adjust Logic
      9. 7.3.9  Bias and Bias OK Circuit (VDD)
      10. 7.3.10 Paralleling the Power Modules
      11. 7.3.11 Measuring the Loop of the Modules
    4. 7.4 Device Functional Modes
      1. 7.4.1 Fault
      2. 7.4.2 Start-Up
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 The Shunt Resistor
        2. 8.2.2.2 The CSA Gain
        3. 8.2.2.3 Determining RADJUST
        4. 8.2.2.4 Error Amplifier Compensation
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

5 Pin Configuration and Functions

D or DGK Package
8-Pin SOIC or VSSOP
Top View
UCC29002 UCC29002-1 UCC39002 po_01_slus495.gif
P Package
8-Pin PDIP
Top View
UCC29002 UCC29002-1 UCC39002 po_02_slus495.gif

Pin Functions

PIN I/O DESCRIPTION
NAME NO.
ADJ 5 O Adjust amplifier output. This is the buffered output of the error amplifier block to adjust output voltage of the power supply being controlled. This pin must always be connected to a voltage equal to or greater than
VEAO + 1 V.
CS– 1 I Current sense amplifier inverting input.
CS+ 2 I Current sense amplifier noninverting input.
CSO 8 O Current sense amplifier output.
EAO 6 O Output for load share error amplifier. (Transconductance error amplifier.)
GND 4 – Ground. Reference ground and power ground for all device functions. Return the device to the low current sense−path of the converter.
LS 7 I/O Load share bus. Output of the load share bus driver amplifier.
VDD 3 I Power supply providing bias to the device. Bypass with a good quality, low ESL 0.1-µF to 1-µF, maximum, capacitor as close to the VDD pin and GND as possible.