VIPER22ASTR-E

Overview

The VIPER22ASTR-E is an AC/DC converter from the VIPerPlus series by STMicroelectronics, packaged in SOIC-8. It integrates a current mode PWM controller and a high voltage power MOSFET on a single silicon chip. Key electrical parameters include a fixed switching frequency of 60 kHz, a maximum output voltage of 730 V, and a maximum output power of 7 W. The device operates with a supply voltage range of 9 V to 38 V and supports a maximum output current of 700 mA. It functions within a temperature range of -40°C to +150°C.

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 low load conditions to minimize input power consumption.
• Includes overtemperature, overcurrent, and overvoltage protection mechanisms with auto-restart capabilities.
• Provides a wide VDD voltage range from 9 V to 38 V to accommodate auxiliary supply variations.

Applications

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

Procurement Notes

Verify the specific suffix 'STR' confirms the tape and reel packaging format required for automated surface mount assembly processes. Confirm RoHS compliance status via the manufacturer's official documentation before finalizing procurement specifications. Ensure the ordering part number matches the exact package type and environmental grade needed for the target application design.

Selection Notes

Select this component for designs requiring a compact offline switcher solution with integrated protection features. The fixed 60 kHz frequency simplifies magnetic component selection compared to variable frequency alternatives. Consider the 7 W power capability limit when designing the transformer and thermal management strategy for the intended load requirements.

Part Context

This part belongs to the VIPer22A-E family, which includes variants like VIPER22AS-E (tube) and VIPER22ADIP-E (DIP). The VIPerPlus series is designed for low-power offline applications, combining control logic and power switching to reduce bill of materials count. The STR suffix specifically denotes the reel packaging configuration used in mass production environments.

Replacement Considerations

Direct substitutes within the same family include VIPER22AS-E and VIPER22ADIP-E, differing primarily in packaging style rather than electrical function. Verify pin compatibility and thermal performance when transitioning between SOIC-8, tube, and DIP packages.