Datasheet > VIPER27H

VIPER27H

更新时间： 2024-11-17 01:20:23

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描述
Off-line high voltage converters

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中文翻译

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VIPER27H 数据手册

VIPER27

Off-line high voltage converters

Features

■ 800 V avalanche rugged power section

■ PWM operation with frequency jittering for low

EMI

SO16 narrow

DIP-7

■ Operating frequency:

– 60 kHz for L type

– 115 kHz for H type

Description

■ Standby power < 50 mW at 265 Vac

The device is an off-line converter with an 800 V

rugged power section, a PWM control, two levels

of over-current protection, overvoltage and

overload protections, hysteretic thermal

protection, soft-start and safe auto-restart after

any fault condition removal. Burst mode operation

and device very low consumption help to meet the

standby energy saving regulations.

■ Limiting current with adjustable set point

■ Adjustable and accurate overvoltage

protection

■ On-board soft-start

■ Safe auto-restart after a fault condition

■ Hysteretic thermal shutdown

Advance frequency jittering reduces EMI filter

cost. Brown-out function protects the switch mode

power supply when the rectified input voltage

level is below the normal minimum level specified

for the system. The high voltage start-up circuit is

embedded in the device.

Application

■ Auxiliary power supply for consumer and home

equipments

■ ATX auxiliary power supply

Figure 1.

Typical topology

■ Low / medium power AC-DC adapters

■ SMPS for set-top boxes, DVD players and

DC input high voltage

wide range

DC Output voltage

recorders, white goods

DRAIN DRAIN

VIPER27

VDD

GND

CONT

Table 1.

Device summary

Order codes

Package

Packaging

VIPER27LN / VIPER27HN

VIPER27HD / VIPER27LD

DIP-7

Tube

SO16 narrow

VIPER27HDTR / VIPER27LDTR

Tape and reel

July 2010

Doc ID 15133 Rev 5

1/31

www.st.com

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中文翻译

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