VIPER53ESP-E datasheet(1/31 Pages) STMICROELECTRONICS

Part #	VIPER53ESP-E

Description	OFF-line Primary Switch

PDF	31 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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January 2006

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31

VIPer53EDIP - E

VIPer53ESP - E

OFF-line Primary Switch

Features

■

Switching frequency up to 300kHz

■

Current mode control with adjustable limitation

■

Soft start and shut-down control

■

Automatic burst mode in standby condition

(“Blue Angel“ compliant )

■

Undervoltage lockout with Hysteresis

■

Integrated start-up current source

■

Over-temperature protection

■

Overload and short-circuit control

■

Overvoltage protection

■

In compliance with the 2002/95/EC European

Directive

Description

The VIPer53E combines an enhanced current

mode

PWM controller

with

a

high

voltage

MDMesh Power MOSFET in the same package.

Typical applications cover offline power supplies

with a secondary power capability ranging up to

30W in wide range input voltage, or 50W in single

European voltage range and DIP-8 package and

40W in wide range input voltage, or 65W in single

European

voltage

range

and

PowerSO-10

package, with the following benefits:

– Overload and short-circuit events

controlled by feedback monitoring and

delayed device reset;

– Efficient standby mode by enhanced pulse

skipping.

– Integrated start-up current source is

disabled during normal operation to reduce

the input power.

DIP-8

PowerSO-10

www.st.com

Block diagram

FF

OSCILLATOR

150/400ns

BLANKING

1V

OVERTEMP.

DETECTOR

8.4/

11.5V

VDD

OSC

DRAIN

COMP

SOURCE

PWM

LA TCH

ON/OFF

BLANKING TIME

SELECTION

PWM

COMPARATOR

CURRENT

AMPLIFIER

S

R1

R2

R3 R4 R5

Q

OVERLOAD

COMPARATOR

18V

125k

0.5V

STANDBY

COMPARATOR

OVERVOLTAGE

COMPARATOR

UVLO

COMPARATOR

H

COMP

0.5V

4.4V

4.5V

TOVL

8V

4V

Vcc

I

COMP

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