VIPer22AS-E
VIPer22AS-E is Low power OFF-line SMPS primary switcher manufactured by STMicroelectronics.
- Part of the VIPer22A-E comparator family.
- Part of the VIPer22A-E comparator family.
Features
- Fixed 60 k Hz 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
Table 1. Typical power capability
Mains type
SO-8
European (195
- 265 Vac) US / wide range (85
- 265 Vac)
12 W 7W
DIP-8 20 W 12 W
Description
The VIPer22A-E bines a dedicated current mode PWM controller with a high voltage power MOSFET on the same silicon chip.
Figure 1. Block diagram
SO-8
DIP-8
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 acmodates 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
60k Hz OSCILLATOR
OVERTEMP. DETECTOR
S R1 FF Q R2 R3 R4
PWM LATCH
OVERVOLTAGE R LATCH
S FF Q
BLANKING
+ _ 0.23 V
1...
