Datasheet

February 2006 Rev1 1/20
20
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
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.
Typical Power Capability
Mains type SO-8 DIP-8
European (195 - 265 Vac) 12W 20W
US / Wide range (85 - 265 Vac) 7W 12W
DIP-8SO-8
www.st.com
Block diagram
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
42V
_
+
R2
FF
S
R
Q
230

Summary of content (20 pages)