VIPER22ADIP-E Datasheet, PDF (1/20 Pages) STMicroelectronics – Low Power OFF-Line SMPS Primary Switcher

VIPer22ADIP - E
VIPer22AS - E
Low Power OFF-Line SMPS Primary Switcher
Features
■ Fixed 60kHZ Switching Frequency
■ 9V to 38V Wide Range V_DD Voltage
■ Current Mode Control
■ Auxiliary Undervoltage Lockout with Hysteresis
■ High Voltage Start-up Current Source
■ Overtemperature, Overcurrent and
Overvoltage Protection with Auto-Restart
Typical Power Capability
Mains type
SO-8
European (195 - 265 Vac)
US / Wide range (85 - 265 Vac)
12W
7W
DIP-8
20W
12W
Block diagram
SO-8
DIP-8
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 V_DD 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.
DRAIN
REGULATOR
INTERNAL
SUPPLY
VDD
FB
_
8/14.5V ₊
+
42V ^_
ON/OFF
60kHz
OSCILLATOR
OVERTEMP.
DETECTOR
PWM
S
LATCH
R1 FF Q
R2 R3 R4
OVERVOLTAGE
R
LATCH
S FF Q
BLANKING
February 2006
Rev1
+
_ _{0.23 V}
1 kΩ
230 Ω
SOURCE
1/20
www.st.com
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