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UCC28251 Datasheet(PDF) 2 Page - Texas Instruments

Part No. UCC28251
Description  UCC28251 Advanced PWM Controller With Prebias Operation
Download  55 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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UCC28251 Datasheet(HTML) 2 Page - Texas Instruments

 
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UCC28251
SLUSBD8E – FEBRUARY 2013 – REVISED DECEMBER 2014
www.ti.com
Table of Contents
8.3
Feature Description................................................. 14
1
Features .................................................................. 1
8.4
Device Functional Modes........................................ 28
2
Applications ........................................................... 1
9
Application and Implementation ........................ 29
3
Description ............................................................. 1
9.1
Application Information............................................ 29
4
Revision History..................................................... 2
9.2
Typical Applications ................................................ 35
5
Description (continued)......................................... 4
10
Power Supply Recommendations ..................... 43
6
Pin Configuration and Functions ......................... 4
11
Layout................................................................... 43
7
Specifications......................................................... 5
11.1
Layout Guidelines ................................................. 43
7.1
Absolute Maximum Ratings ...................................... 5
11.2
Layout Example .................................................... 44
7.2
ESD Ratings ............................................................ 5
11.3
Thermal Protection................................................ 44
7.3
Recommended Operating Conditions ....................... 5
12
Device and Documentation Support ................. 45
7.4
Thermal Information .................................................. 6
12.1
Documentation Support ........................................ 45
7.5
Electrical Characteristics........................................... 6
12.2
Trademarks ........................................................... 45
7.6
Typical Characteristics .............................................. 9
12.3
Electrostatic Discharge Caution ............................ 45
8
Detailed Description ............................................ 13
12.4
Glossary ................................................................ 45
8.1
Overview ................................................................. 13
13
Mechanical, Packaging, and Orderable
8.2
Functional Block Diagram ....................................... 14
Information ........................................................... 45
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (April 2013) to Revision E
Page
Added Pin Configuration and Functions section, 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
Changes from Revision C (April, 2013) to Revision D
Page
Added VREF value for EN (Enable Pin) pin description. ..................................................................................................... 15
Changed Equation 3. ............................................................................................................................................................ 17
Changed Figure 27. .............................................................................................................................................................. 19
Changed Figure 28. .............................................................................................................................................................. 20
Changed Equation 4. ............................................................................................................................................................ 20
Changed Current Limit Circuit diagram. ............................................................................................................................... 25
Changed UCC28251 Set Up for Peak Current Mode Control diagram................................................................................ 33
Changed Equation 28. .......................................................................................................................................................... 37
Changes from Revision B (March 2013) to Revision C
Page
Changed Operating junction temperature range from (-40 to 125) to (125 to 150). .............................................................. 5
Added UCC28251PW Current Sense data. ........................................................................................................................... 7
Changed Functional Block Diagram ..................................................................................................................................... 14
2
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Product Folder Links: UCC28251


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