VIPER15 STMicroelectronics, VIPER15 Datasheet - Page 2

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VIPER15

Manufacturer Part Number
VIPER15
Description
VIPerPlus family: quasi-resonant high performance off line high voltage converter
Manufacturer
STMicroelectronics
Datasheet

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Contents
Contents
1
2
3
4
5
6
7
2/40
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1
4.2
4.3
Typical electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Operation description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
7.15
7.16
Current limit set point and feed-forward option . . . . . . . . . . . . . . . . . . . . . 24
Overvoltage protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Summary on ZCD pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Feedback and overload protection (OLP) . . . . . . . . . . . . . . . . . . . . . . . . . 28
Burst-mode operation at no load or very light load . . . . . . . . . . . . . . . . . . 32
Brown-out protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2nd level overcurrent protection and hiccup mode . . . . . . . . . . . . . . . . . . 34
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power section and gate driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
High voltage startup generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Power-up description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power-down description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Auto-restart description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Quasi-resonant operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Frequency foldback function and valley skipping mode . . . . . . . . . . . . . . 22
Double blanking time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Starter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Doc ID 15455 Rev 5
VIPER15

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