VIPer22ADIP
® VIPer22AS
LOW POWER OFF LINE SMPS PRIMARY SWITCHER
TYPICAL POWER CAPABILITY
Mains type
SO-8
European
(195 - 265 Vac)
12 W
US / Wide range
(85 - 265 Vac)
7W
DIP-8
20 W
12 W
n FIXED 60 KHZ SWITCHING FREQUENCY
n 9V TO 38V WIDE RANGE VDD VOLTAGE
n CURRENT MODE CONTROL
n AUXILIARY UNDERVOLTAGE LOCKOUT
WITH HYSTERESIS
n HIGH VOLTAGE START UP CURRENT
SOURCE
n OVERTEMPERATURE, OVERCURRENT AND
OVERVOLTAGE PROTECTION WITH
AUTORESTART
DESCRIPTION
The VIPer22A combines a dedicated current mode
PWM controller with a high voltage Power
BLOCK DIAGRAM
SO-8
DIP-8
PACKAGE
SO-8
DIP-8
ORDER CODES
TUBE
T&R
VIPer22AS VIPer22AS13TR
VIPer22ADIP -
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.
DRAIN
REGULATOR
INTERNAL
SUPPLY
VDD
FB
_
8/14.5V +
+
42V _
ON/OFF
60kHz
OSCILLATOR
OVERTEMP.
DETECTOR
S
R1 FF Q
R2 R3 R4
PWM
LATCH
OVERVOLTAGE
R LATCH
S FF Q
BLANKING
+
_ 0.23 V
1 kΩ
230 Ω
SOURCE
September 2002
1/15
