VIPER12ASTR-E

Overview

The VIPER12ASTR-E is a low-power off-line SMPS primary switcher from the VIPerPlus family, integrating a current mode PWM controller and a high voltage power MOSFET on a single silicon chip. It operates with a fixed switching frequency of 60 kHz and supports an output voltage of 730 V. The device delivers up to 5 W of output power within a supply voltage range of 9 V to 38 V. It features a maximum duty cycle of 16% and a typical operating supply current of 4.5 mA. Designed for surface mount applications in SOIC-8 packages, it functions reliably across temperatures from -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 and HICCUP mode overvoltage protection
• Includes internal high voltage start-up current source eliminating external startup resistors
• Provides comprehensive protection against overtemperature, overcurrent, and overvoltage with auto-restart functionality

Applications

• Off-line 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 'E' indicates RoHS compliance status as per manufacturer documentation. Confirm the SOIC-8 package variant matches design requirements. Check humidity sensitivity classification for proper storage and handling procedures during assembly. Ensure the reel or cut tape packaging aligns with production line equipment capabilities.

Selection Notes

Select this component for designs requiring integrated high voltage switching without external discrete MOSFETs. Consider the fixed 60 kHz frequency when designing transformer specifications. Evaluate the 5 W power capability against system load requirements. Verify that the wide VDD input range accommodates auxiliary supply variations in the target application circuit.

Part Context

This part belongs to the VIPerPlus family of AC/DC converters manufactured by STMicroelectronics. It is specifically categorized as an off-line converter within the PMIC segment. The STR suffix denotes the surface mount SOIC-8 packaging format, distinguishing it from through-hole DIP variants like the VIPER12ADIP-E.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.