VIPER319XDTR

Overview

The VIPER319XDTR is an offline high-voltage converter from the VIPERPlus family, integrating an 800 V avalanche-rugged power MOSFET with PWM current-mode control. It supports flyback, buck, and buck-boost topologies with a fixed switching frequency of 30 kHz ±7%. The device features integrated HV startup, sense FET, error amplifier, and oscillator with frequency jitter. Drain current limit protection is specified at 990 mA. Supply voltage ranges from 4.5 V to 30 V. It includes protections for overload, short-circuit, thermal shutdown, overvoltage, and undervoltage.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET for extended input voltage range coverage.
• Features embedded high-voltage startup and sense FET to minimize external component count.
• Includes built-in soft-start and jittered switching frequency to improve reliability and reduce EMI filter costs.
• Supports multiple topologies including flyback, buck, and buck-boost configurations.

Applications

• General purpose offline power supplies
• Buck converters operating from universal mains input
• Flyback converters requiring low standby consumption

Procurement Notes

Verify the specific suffix 'X' against the official STMicroelectronics datasheet to confirm the exact switching frequency variant, as the VIPER31 series utilizes suffixes like L, H, and X to denote different frequencies. Ensure the package type matches the required 16-SO footprint. Confirm RoHS compliance status for the specific manufacturing lot if required by regulatory standards.

Selection Notes

Select this component when designing systems requiring an 800 V breakdown voltage and a 30 kHz switching frequency. It is suitable for applications needing integrated protections such as thermal shutdown and current limiting. Consider the 16-SO package constraints and the need for minimum external components due to the integrated HV startup and sense FET.

Part Context

The VIPER319XDTR belongs to the VIPERPlus family of energy-saving off-line high-voltage converters. This family integrates a power MOSFET with a PWM controller to simplify design. The VIPER319 variant specifically offers a higher drain current limit compared to lower-numbered siblings in the same series, supporting up to 990 mA.

FAQ

What is the switching frequency of the VIPER319XDTR?

The VIPER319XDTR operates at a fixed switching frequency of 30 kHz with a tolerance of ±7%.

Does the VIPER319XDTR support buck topology?

Yes, the VIPER31 device supports flyback, buck, and buck-boost topologies.