Datasheet > VIPER12A-E

VIPER12A-E

更新时间： 2023-12-20 18:44:34

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		转换器
页数	文件大小	规格书
21页	522K
描述
固定频率离线转换器

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VIPER12A-E 数据手册

VIPER12A-E

Low power offline switched-mode power supply primary switcher

Features

■ Fixed 60 kHz switching frequency

■ 9 V to 38 V wide range V voltage

■ Current mode control

■ Auxiliary undervoltage lockout with hysteresis

■ High voltage start-up current source

SO-8

DIP-8

■ Overtemperature, overcurrent and overvoltage

Typical applications cover off line power supplies

for battery charger adapters, standby power

supplies for TV or monitors, auxiliary supplies for

motor control, etc.

protection with auto-restart

■ Typical power capability

– European (195 - 265 Vac) 8 W for SO-8,

13 W for DIP-8

The internal control circuit offers the following

– European (85 - 265 Vac) 5 W for SO-8,

8 W for DIP-8

benefits: Large input voltage range on the V pin

accommodates changes in auxiliary supply

voltage (This feature is well adapted to battery

charger adapter configurations), automatic burst

mode in low load condition and overvoltage

protection in HICCUP mode.

Description

The VIPER12A combines a dedicated current

mode PWM controller with a high voltage power

MOSFET on the same silicon chip.

Figure 1. Block diagram

DRAIN

ON/OFF

60kHz

OSCILLATOR

REGULATOR

PWM

LATCH

INTERNAL

SUPPLY

R2 R3 R4

OVERTEMP.

DETECTOR

VDD

BLANKING

0.23 V

8/14.5V

42V

OVERVOLTAGE

LATCH

230 Ω

1 kΩ

SOURCE

December 2010

Doc ID 11977 Rev 2

1/21

www.st.com

12 3 4 5 6 7...21

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