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VIPER17LN

Off-line high voltage converters

STMicroelectronics 

VIPER17

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 over voltage

protection

■ On-board soft-start

■ Safe auto-restart after a fault condition

■ Hysteretic thermal shutdown

Application

■ Adapters for PDA, camcorders, shavers,

cellular phones, videogames

■ Auxiliary power supply for LCD/PDP TV,

monitors, audio systems, computer, industrial

systems

■ SMPS for set-top boxes, DVD players and

recorders, white goods

SO16 narrow

SO-16

DIP-7

Description

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

rugged power section, a PWM control, two levels

of over current protection, over voltage 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 helps 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

+

DC input high voltage

wide range

-

+

DC Output voltage

-

DRAIN DRAIN

BR

VIPER17

GND VDD CONT FB

Table 1. Device summary

Order codes

VIPER17LN / VIPER17HN

VIPER17HD / VIPER17LD

VIPER17HDTR / VIPER17LDTR

October 2008

Package

DIP-7

SO16 narrow

Rev 4

Packaging

Tube

Tube

Tape and reel

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