VIPER012XS datasheet(2/36 Pages) STMICROELECTRONICS

2 / 36 page

Contents

VIPer01

2/36

DocID028751 Rev 1

Contents

Pin setting ........................................................................................ 5

Electrical and thermal ratings ........................................................ 6

2.1

Electrical characteristics.................................................................... 8

Typical electrical characteristics.................................................. 12

General description....................................................................... 16

4.1

Block diagram ................................................................................. 16

4.2

Typical power capability .................................................................. 16

4.3

Primary MOSFET............................................................................ 17

4.4

High voltage startup ........................................................................ 17

4.5

Soft-start ......................................................................................... 19

4.6

Oscillator ......................................................................................... 19

4.7

Pulse-skipping................................................................................. 19

4.8

Direct feedback ............................................................................... 21

4.9

Secondary feedback ....................................................................... 21

4.10

Pulse frequency modulation ............................................................ 21

4.11

Overload protection......................................................................... 22

4.12

Max. duty cycle counter protection.................................................. 22

4.13

VCC clamp protection ..................................................................... 23

4.14

Disable function............................................................................... 23

4.15

Thermal shutdown........................................................................... 25

Application information ................................................................ 26

5.1

Typical schematics.......................................................................... 26

5.3

Energy saving performance ............................................................ 29

5.4

Layout guidelines and design recommendations ............................ 30

Package information ..................................................................... 32

6.1

SSOP10 package information ......................................................... 32

Ordering information..................................................................... 34

Revision history ............................................................................ 35

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