VIPER20A-E

Overview

The VIPER20A-E is a high-voltage offline switcher from the VIPerPlus family, integrating a current-mode PWM controller and a 700V power MOSFET. It implements flyback topology with a maximum switching frequency of 200kHz. The device supports an auxiliary supply voltage range of 8V to 15V and features a start-up voltage of 11V. It delivers up to 20W output power and includes internal protection against overcurrent and overtemperature conditions.

Feature Summary

• Integrates a dedicated current-mode PWM controller with a high-voltage power MOSFET on a single silicon chip
• Features automatic burst mode operation for improved efficiency under low load conditions
• Includes comprehensive protection mechanisms such as overcurrent limiting, overtemperature shutdown, and overvoltage protection in hiccup mode

Applications

• Battery charger adapters
• Standby power supplies for televisions or monitors
• Auxiliary supplies for motor control systems

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors. Confirm RoHS3 compliance and moisture sensitivity level (MSL 3) requirements during storage and handling. Check datasheet revisions for any updates to electrical characteristics or pin configurations before finalizing design integration.

Selection Notes

Select this component for isolated flyback designs requiring integrated high-voltage switching. Ensure the application operates within the specified 8V to 15V Vcc range. Consider thermal management due to the PowerSO-10 package. Verify that the 200kHz switching frequency aligns with transformer design constraints and EMI requirements.

Part Context

Part of the VIPerPlus series combining control and power stages. Designed for cost-effective, compact offline power solutions. Replaces discrete controller and MOSFET implementations by reducing component count and board space.

Replacement Considerations

VIPER20ASP-E is a verified equivalent part number.