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VIPER35 数据表(PDF) 2 Page - STMicroelectronics

部件名 VIPER35
功能描述  Quasi-resonant high performance off line high voltage converter
PDF  44 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

VIPER35 数据表(HTML) 2 Page - STMicroelectronics

  VIPER35 Datasheet HTML 1Page - STMicroelectronics VIPER35 Datasheet HTML 2Page - STMicroelectronics VIPER35 Datasheet HTML 3Page - STMicroelectronics VIPER35 Datasheet HTML 4Page - STMicroelectronics VIPER35 Datasheet HTML 5Page - STMicroelectronics VIPER35 Datasheet HTML 6Page - STMicroelectronics VIPER35 Datasheet HTML 7Page - STMicroelectronics VIPER35 Datasheet HTML 8Page - STMicroelectronics VIPER35 Datasheet HTML 9Page - STMicroelectronics Next Button
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Contents
VIPer35
2/44
DocID026980 Rev 4
Contents
1
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Typical output power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5
Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6
Typical circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7
Efficiency performance for a typical flyback converter . . . . . . . . . . . . 18
8
Operation description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.1
Power section and gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.2
High voltage start-up generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.3
Power-up and soft-start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8.4
Power-down description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.5
Auto-restart description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.6
Quasi-resonant operation (QR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.7
Frequency foldback function and valley-skipping mode . . . . . . . . . . . . . . 25
8.8
Blanking time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.9
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.10
Current limit set-point and feed-forward option . . . . . . . . . . . . . . . . . . . . 27
8.11
Overvoltage protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.12
ZCD pin summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.13
Feedback and overload protection (OLP) . . . . . . . . . . . . . . . . . . . . . . . . 32
8.14
Burst mode operation at no-load or very light load . . . . . . . . . . . . . . . . . . 35
8.15
Brown-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36



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