UCC2897A_15 Datasheet, PDF (2/46 Pages) Texas Instruments – Advanced Current-Mode Active-Clamp PWM Controller

UCC2897A
SLUS829E – AUGUST 2008 – REVISED APRIL 2015
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Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Device Options....................................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 6
7.5 Electrical Characteristics........................................... 6
7.6 Timing Requirements ............................................... 7
7.7 Typical Characteristics .............................................. 9
8 Detailed Description ............................................ 12
8.1 Overview ................................................................. 12
8.2 Functional Block Diagram ....................................... 12
8.3 Feature Description................................................. 13
8.4 Device Functional Modes........................................ 27
9 Application and Implementation ........................ 28
9.1 Application Information............................................ 28
9.2 Typical Application ................................................. 28
10 Power Supply Recommendations ..................... 34
11 Layout................................................................... 34
11.1 Layout Guidelines ................................................. 34
11.2 Layout Example .................................................... 34
12 Device and Documentation Support ................. 36
12.1 Documentation Support ....................................... 36
12.2 Trademarks ........................................................... 36
12.3 Electrostatic Discharge Caution ............................ 36
12.4 Glossary ................................................................ 36
13 Mechanical, Packaging, and Orderable
Information ........................................................... 36
4 Revision History
Changes from Revision D (July 2009) to Revision E
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section. ................................................................................................ 1
• Changed Thermal Resistance Information table to new Thermal Information layout and updated PW and RGP
package data .......................................................................................................................................................................... 3
• Added R_ON and R_OFF, R_DEL test conditions to D_MAX parameter in the PWM section of the Electrical Characteristics table... 7
• Changed Oscillator equations in Step 1 for R_ON and R_OFF ................................................................................................... 30
2
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