VIPER22A-E datasheet(1/21 Pages) STMICROELECTRONICS

Il numero della parte	VIPER22A-E

Spiegazioni elettronici	Low power OFF-line SMPS primary switcher

PDF	21 Pages

Scroll/Zoom	100%

Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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1 / 21 page

November 2010

Doc ID 12050 Rev 2

1/21

21

VIPer22A-E

VIPer22ADIP-E, VIPer22AS-E

Low power OFF-line SMPS primary switcher

Features

■ Fixed 60 kHz switching frequency

■ 9 V to 38 V wide range VDD voltage

■ Current mode control

■ Auxiliary undervoltage lockout with hysteresis

■ High voltage start-up current source

■ Overtemperature, overcurrent and overvoltage

protection with auto-restart

Description

The VIPer22A-E combines a dedicated current

mode PWM controller with a high voltage power

MOSFET on the same silicon chip.

Typical applications cover off line power supplies

for battery charger adapters, standby power

supplies for TV or monitors, auxiliary supplies for

motor control, etc. The internal control circuit

offers the following benefits:

Large input voltage range on the VDD pin

accommodates changes in auxiliary supply

voltage. This feature is well adapted to battery

charger adapter configurations.

Automatic burst mode in low load condition.

Overvoltage protection in HICCUP mode.

Figure 1.

Block diagram

Table 1.

Typical power capability

Mains type

SO-8

DIP-8

European (195 - 265 Vac)

12 W

20 W

US / wide range (85 - 265 Vac)

7 W

12 W

DIP-8

SO-8

ON/OFF

0.23 V

DRAIN

SOURCE

VDD

PWM

LATCH

60kHz

OSCILLATOR

BLANKING

+

_

8/14.5V

_

+

FF

S

R1

R4

Q

R3

FB

REGULATOR

INTERNAL

SUPPLY

OVERVOLTAGE

LATCH

OVERTEMP.

DETECTOR

1 k

Ω

42V

_

+

R2

FF

S

R

Q

230

Ω

www.st.com

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