VIPER15HDTR

Overview

The VIPER15HDTR is a high-voltage integrated circuit from the VIPerPlus family, designed as an off-line switch for flyback topology AC/DC converters. It integrates an 800V avalanche-rugged power MOSFET with a PWM controller. The device operates at a fixed switching frequency of 225kHz and supports a supply voltage range of 8.5V to 23.5V. It features internal startup circuitry, eliminating the need for auxiliary windings in low-power applications. The component is housed in a 16-SOIC package and includes protections against overcurrent, overtemperature, and overvoltage.

Feature Summary

• Integrates an 800V avalanche-rugged power MOSFET with a current-mode PWM controller for compact offline converter designs.
• Features self-supply capability via HV startup, removing the requirement for auxiliary bias windings in low-power applications.
• Includes comprehensive protection mechanisms such as cycle-by-cycle current limiting, hysteretic thermal shutdown, and safe auto-restart.
• Operates with fixed frequency switching to simplify EMI filter design while maintaining robust performance under varying load conditions.

Applications

• Offline AC/DC power supplies using flyback topology
• Battery chargers for consumer electronics
• Adapters for portable devices requiring isolated DC output
• General-purpose low-power offline conversion systems

Procurement Notes

Verify the specific suffix HDTR indicates tape-and-reel packaging when sourcing. Confirm RoHS3 compliance status as required by regional regulations. Check for obsolescence notices since this part may be discontinued; direct substitutes like VIPER16HDTR or VIPER17HDTR should be evaluated for pin compatibility and electrical equivalence before finalizing procurement plans.

Selection Notes

Select this component for applications requiring a fixed 225kHz switching frequency and high input voltage tolerance up to 800V breakdown. It is suitable for designs aiming to minimize external components by leveraging the integrated startup circuit. Ensure the thermal management strategy accounts for the 150°C junction temperature limit and the SOIC-16 package's thermal dissipation characteristics during operation.

Part Context

This device belongs to the VIPerPlus family of high-voltage converters, which are known for integrating power and control functions into a single monolithic IC. The series offers various options differentiated by switching frequency and package type, allowing designers to optimize for cost, size, or efficiency depending on the specific application requirements.

Replacement Considerations

Direct substitutes include VIPER16HDTR and VIPER17HDTR. Verify that the alternative part number matches the required switching frequency and package configuration. Ensure the replacement maintains the same 800V rating and protection features to guarantee system reliability without redesigning the control loop.

FAQ

Does the VIPER15HDTR require an auxiliary winding for operation?

No, the device features an internal high-voltage startup circuit that allows it to power itself directly from the rectified mains, eliminating the need for an auxiliary bias winding in low-power applications.

What is the switching frequency of the VIPER15HDTR?

The VIPER15HDTR operates at a fixed switching frequency of 225kHz.

What protection features are integrated into the VIPER15HDTR?

It includes cycle-by-cycle current limiting, hysteretic thermal shutdown, and safe auto-restart functionality after fault conditions such as overload or short circuit.