VIPER12A-E
Low power offline switched-mode power supply primary switcher
Features
■ Fixed 60 kHz switching frequency ■ 9 V to 38 V wide range VDD
voltage ■ Current mode control ■ Auxiliary under
voltage lockout with hysteresis ■ High
voltage start-up current source ■ Overtemperature, overcurrent and over
voltage
protection with auto-restart ■ Typical power capability
– European (195 - 265 Vac) 8 W for SO-8, 13 W for DIP-8
– European (85 - 265 Vac) 5 W for SO-8, 8 W for DIP-8
Description
The VIPER12A combines 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...