VIPER17 Datasheet, PDF (1/31 Pages) STMicroelectronics – Off-line high voltage converters

VIPER17
Off-line high voltage converters
Features
■ 800 V avalanche rugged power section
■ PWM operation with frequency jittering for low
EMI
■ Operating frequency:
– 60 kHz for L type
– 115 kHz for H type
■ Standby power < 50 mW at 265 Vac
■ Limiting current with adjustable set point
■ Adjustable and accurate over voltage
protection
■ On-board soft-start
■ Safe auto-restart after a fault condition
■ Hysteretic thermal shutdown
Application
■ Adapters for PDA, camcorders, shavers,
cellular phones, videogames
■ Auxiliary power supply for LCD/PDP TV,
monitors, Audio systems, computer, industrial
■ SMPS for set-top boxes, DVD players and
recorders, white goods.
DIP-7
Description
The device is an off-line converter with an 800 V
rugged power section, a PWM control, two levels
of over current protection, over voltage and
overload protections, hysteretic thermal
protection, soft-start and safe auto-restart after
any fault condition removal. Burst mode operation
and device very low consumption helps to meet
the standby energy saving regulations.
Advance frequency jittering reduces EMI filter
cost. Brown-out function is embedded into the
high voltage start-up.
Figure 1. Typical topology
Table 1.
Device summary
Order codes
VIPER17LN
VIPER17HN
February 2008
Package
DIP-7
Rev 2
Packaging
Tube
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