Data Sheet 2 Revision 1.0
2016-05-12
Quasi-Resonant, 800V CoolSET™ in DS0-12 Package
Pin Configuration and Functionality
Table of Contents
Product Highlights ......................................................................................................... 1
Features ....................................................................................................................... 1
Applications .................................................................................................................. 1
Description ................................................................................................................... 1
1 Pin Configuration and Functionality ................................................................................ 3
2 Representative Block Diagram ........................................................................................ 4
3 Functional Description ................................................................................................... 5
3.1 Introduction ................................................................................................................................................... 5
3.2 Soft-start ........................................................................................................................................................ 5
3.3 Normal Operation ......................................................................................................................................... 6
3.3.1 Digital Frequency Reduction .................................................................................................................. 6
3.3.1.1 Up/down counter................................................................................................................................ 6
3.3.1.2 Zero crossing (ZC counter) ................................................................................................................ 7
3.3.1.3 Ringing suppression time .................................................................................................................. 8
3.3.1.4 Switch on determination ................................................................................................................... 8
3.3.1.5 Switch off determination ................................................................................................................... 8
3.4 Current Limitation ......................................................................................................................................... 9
3.4.1 Foldback Point Correction ...................................................................................................................... 9
3.5 Active Burst Mode ........................................................................................................................................ 10
3.5.1 Entering Active Burst Mode Operation ................................................................................................ 10
3.5.2 During Active Burst Mode Operation ................................................................................................... 10
3.5.3 Leaving Active Burst Mode Operation.................................................................................................. 11
3.6 Protection Functions................................................................................................................................... 11
4 Electrical Characteristics ............................................................................................... 13
4.1 Absolute Maximum Ratings ........................................................................................................................ 13
4.2 Operating Range .......................................................................................................................................... 14
4.3 Characteristics ............................................................................................................................................. 14
4.3.1 Supply Section........................................................................................................................................ 14
4.3.2 Internal Voltage Reference .................................................................................................................... 15
4.3.3 PWM Section ........................................................................................................................................... 15
4.3.4 Current Sense ......................................................................................................................................... 15
4.3.5 Soft Start ................................................................................................................................................. 15
4.3.6 Foldback Point Correction .................................................................................................................... 16
4.3.7 Digital Zero Crossing .............................................................................................................................. 16
4.3.8 Active Burst Mode .................................................................................................................................. 17
4.3.9 Protection ............................................................................................................................................... 17
4.3.10 CoolMOS™ Section ................................................................................................................................. 18
5 CoolMOS™ Performance Characteristics .......................................................................... 19
6 Input Power Curve ........................................................................................................ 21
7 Outline Dimension ........................................................................................................ 22
8 Marking ....................................................................................................................... 23
Revision History ........................................................................................................... 23