VIPER20A-22-E Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

VIPER20A-22-E

SMPS primary I.C.

STMicroelectronics 

VIPer50A-E

VIPer50ASP-E

SMPS PRIMARY I.C.

General Features

Type

VIPer50A-E/ASP-E

VDSS

700V

In

1.5A

RDS(on)

5.7Ω

10

1

■ ADJUSTABLE SWITCHING FREQUENCY UP

TO 200 kHz

■ CURRENT MODE CONTROL

■ SOFT START AND SHUTDOWN CONTROL

■ AUTOMATIC BURST MODE OPERATION IN

STAND-BY CONDITION ABLE TO MEET

“BLUE ANGEL” NORM (<1w TOTAL POWER

CONSUMPTION)

■ INTERNALLY TRIMMED ZENER

REFERENCE

■ UNDERVOLTAGE LOCK-OUT WITH

HYSTERESIS

■ INTEGRATED START-UP SUPPLY

■ OVER-TEMPERATURE PROTECTION

■ LOW STAND-BY CURRENT

■ ADJUSTABLE CURRENT LIMITATION

Block Diagram

PENTAWATT HV

POWERSO-10TM

PENTAWATT HV (022Y)

Description

VIPer50A-E/ASP-E, made using VIPower M0

Technology, combines on the same silicon chip a

state-of-the-art PWM circuit together with an

optimized, high voltage, Vertical Power MOSFET

(700V/ 1.5A).

Typical applications cover offline power supplies

with a secondary power capability of 25W in wide

range condition and 50W in single range or with

doubler configuration. It is compatible from both

primary or secondary regulation loop despite

using around 50% less components when

compared with a discrete solution. Burst mode

operation is an additional feature of this device,

offering the ability to operate in stand-by mode

without extra components.

OSC

DRAIN

ON/OFF

OSCILLATOR

SECURITY PWM

LATCH

LATCH

VDD

UVLO

LOGIC

R/S FF Q

S

R1 FF Q

S

R2 R3

OVERTEMP.

DETECTOR

0.5 V +

_

ERROR

_ AMPLIFIER

13 V +

4.5 V

1.7 µ s

DELAY

250 ns

BLANKING

0.5V

++ _

_

2 V/A

CURRENT

AMPLIFIER

September 2005

COMP

SOURCE

Rev 1

1/31

www.st.com

31

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