VIPER37LD

Overview

The VIPER37LD is an offline converter from the VIPerPlus family, integrating a high-voltage power MOSFET and PWM controller in a single package. It features an 800 V avalanche-rugged power section for ultra-wide range input voltage operation. The device supports flyback topology with a fixed operating frequency of 60 kHz and a maximum duty cycle of 80%. It includes advanced protection mechanisms such as overcurrent, overvoltage, overload, and hysteretic thermal shutdown. The unit operates within a temperature range of -40°C to +150°C TJ and consumes only 30 mW in standby mode at 265 V ac.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET with PWM control for high-performance offline conversion.
• Features frequency jittering to reduce EMI filter costs and meet EMC requirements.
• Includes comprehensive protection against overcurrent, overvoltage, overload, and thermal faults with safe auto-restart.
• Supports burst mode operation for low standby power consumption.

Applications

• High performance off-line converters
• Universal input adapters
• Battery chargers

Procurement Notes

Verify the specific suffix (LD) corresponds to the tube packaging configuration when ordering. Confirm that the application design accounts for the 800 V breakdown rating and the 60 kHz switching frequency. Ensure thermal management strategies align with the specified junction temperature limits and hysteretic thermal shutdown characteristics documented in the official datasheet.

Selection Notes

Select this component for designs requiring a rugged 800 V power stage integrated with control logic. It is suitable for applications needing low standby power and reduced EMI through frequency jittering. Consider the 16-SO package constraints and the need for external components to support the flyback topology and protection circuits defined by the manufacturer.

Part Context

This part belongs to the VIPerPlus series of AC/DC converters manufactured by STMicroelectronics. It is designed as a monolithic system combining a high-voltage MOSFET with intelligent control circuitry. The series targets cost-effective and compact power supply solutions for universal input applications.

Replacement Considerations

The VIPER27LD is listed as a parameter-equivalent substitute option available from the same manufacturer.