VIPER27LD datasheet(1/31 Pages) STMICROELECTRONICS

部件名	VIPER27LD

功能描述	Off-line high voltage converters

PDF	31 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 31 page

July 2010

Doc ID 15133 Rev 5

1/31

31

VIPER27

Off-line high voltage converters

Features

■ 800 V avalanche rugged power section

■ PWM operation with frequency jittering for low

EMI

■ Operating frequency:

– 60 kHz for L type

– 115 kHz for H type

■ Standby power < 50 mW at 265 Vac

■ 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

Application

■ Auxiliary power supply for consumer and home

equipments

■ ATX auxiliary power supply

■ Low / medium power AC-DC adapters

■ SMPS for set-top boxes, DVD players and

recorders, white goods

Description

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.

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.

Figure 1.

Typical topology

DIP-7

SO 16

SO16 narrow

DC input high voltage

wide range

-

+

DC Output voltage

-

+

VIPER27

DRAIN

BR

VDD

CONT

FB

GND

Table 1.

Device summary

Order codes

Package

Packaging

VIPER27LN / VIPER27HN

DIP-7

Tube

VIPER27HD / VIPER27LD

SO16 narrow

VIPER27HDTR / VIPER27LDTR

Tape and reel

www.st.com

类似零件编号 - VIPER27LD

制造商	部件名	数据表	功能描述
STMicroelectronics	VIPER27LD	1Mb / 31P	Off-line high voltage converters 30-Jul-2010
STMicroelectronics	VIPER27LDTR	1Mb / 31P	Off-line high voltage converters 30-Jul-2010

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