STMicroelectronics Viper27LN

Description

The device is an off-line converter with an 800 V rugged power section, a PWM control, two levels of over-current protection, overvoltage andoverload protections, hysteretic thermal protection, soft-start and safe auto-restart after any fault condition removal. Burst mode operationand device very low consumption help to meet the standby energy saving regulations.

Advance frequency jittering reduces EMI filter cost. Brown-out function protects the switch mode ower supply when the rectified input voltagelevel is below the normal minimum level specified for the system. The high voltage start-up circuit is embedded in the device.

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 overvoltage protection
• On-board soft-start
• Safe auto-restart after a fault condition
• Hysteretic thermal shutdown

Typical applications

• Auxiliary power supply for consumer and home equipments ,Low / medium power AC-DC adapters
• SMPS for set-top boxes, DVD players and recorders, white goods
• ATX auxiliary power supply

More information

• Datasheet
• IC product information