ICE5QSAG データシートの表示（PDF） - Infineon Technologies
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ICE5QSAG Datasheet PDF : 27 Pages
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Quasi-Resonant Controller
Table of Contents
Table of Contents
Product Highlights.......................................................................................................................... 1
Features ........................................................................................................................................ 1
Applications ................................................................................................................................... 1
Description .................................................................................................................................... 1
Table of Contents ........................................................................................................................... 2
1 Pin Configuration and Functionality ......................................................................................... 4
2 Representative Block Diagram................................................................................................. 5
3 Functional Description............................................................................................................ 6
3.1
VCC Pre-Charging and Typical VCC Voltage during Start-up ..................................................................... 6
3.2
Soft-start .................................................................................................................................................. 6
3.3
Normal Operation ................................................................................................................................... 7
3.3.1
Digital Frequency Reduction ............................................................................................................. 7
3.3.1.1
Minimum ZC Count Determination .............................................................................................. 7
3.3.1.2
Up/down counter..........................................................................................................................7
3.3.1.3
Zero crossing (ZC counter) ........................................................................................................... 8
3.3.2
Ringing suppression time .................................................................................................................. 9
3.3.2.1
Switch on determination .............................................................................................................. 9
3.3.3
Switch off determination ................................................................................................................... 9
3.3.4
Modulated gate drive ....................................................................................................................... 10
3.4
Current limitation..................................................................................................................................10
3.5
Active Burst Mode with selectable power level....................................................................................11
3.5.1
Entering Active Burst Mode Operation ............................................................................................ 12
3.5.2
During Active Burst Mode Operation ............................................................................................... 12
3.5.3
Leaving Active Burst Mode Operation ............................................................................................. 12
3.6
Protection Functions............................................................................................................................. 13
3.6.1
Line Over Voltage ............................................................................................................................. 14
3.6.2
Brownout .......................................................................................................................................... 14
3.6.3
VCC Ovder Voltage or Under Voltage.................................................................................................14
3.6.4
Over Load ......................................................................................................................................... 14
3.6.5
Output Over Voltage ........................................................................................................................ 14
3.6.6
Over Temperature ............................................................................................................................ 14
4 Electrical Characteristics .......................................................................................................17
4.1
Absolute Maximum Ratings .................................................................................................................. 17
4.2
Operating Range....................................................................................................................................17
4.3
Operating Conditions ............................................................................................................................ 18
4.4
Internal Voltage Reference.................................................................................................................... 18
4.5
Gate Driver ............................................................................................................................................. 18
4.6
PWM Section .......................................................................................................................................... 19
4.7
Current Sense ........................................................................................................................................ 19
4.8
Soft Start................................................................................................................................................19
4.9
Digital Zero Crossing ............................................................................................................................. 20
4.10
Active Burst Mode..................................................................................................................................20
4.11
Line Over Voltage Protection ................................................................................................................ 21
4.12
Brownout Protection............................................................................................................................. 21
4.13
VCC Over Voltage Protection .................................................................................................................. 21
4.14
Over Load Protection ............................................................................................................................ 21
Datasheet
2 of 27
V 2.1
2020-02-03
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