VIPER17LDTR

Overview

The VIPER17LDTR is an offline switch from the VIPerPlus family, designed for flyback topology applications. It integrates a high-voltage power MOSFET with a fixed-frequency PWM controller operating at 60 kHz. The device features an 800 V breakdown voltage and supports a supply voltage range of 8.5 V to 23.5 V. Key electrical parameters include a maximum duty cycle of 70% and a rated power output of 10 W. It operates within a junction temperature range of -40°C to 150°C and utilizes a 16-SOIC package.

Feature Summary

• Integrates an 800 V rugged power section with PWM control for high-voltage off-line conversion.
• Includes comprehensive protection mechanisms such as overcurrent limiting, overvoltage protection, and hysteresis thermal shutdown.
• Features soft-start capability and safe auto-restart functionality following fault condition removal.
• Supports burst mode operation to achieve low standby power consumption in compliance with energy-saving regulations.

Applications

• LCD TV power supplies
• DVD player power adapters
• Set-top box power management
• Battery chargers

Procurement Notes

Verify the specific suffix 'L' indicates the 60 kHz switching frequency variant, distinct from other family members. Confirm the 'TR' suffix corresponds to tape and reel packaging requirements for your assembly line. Ensure compatibility with the 16-SOIC footprint during PCB layout verification.

Selection Notes

Select this component for isolated flyback designs requiring integrated high-voltage switching. The fixed 60 kHz frequency simplifies magnetic component design compared to variable frequency controllers. Consider the internal startup circuit when designing the auxiliary winding or bias supply network.

Part Context

This part belongs to the VIPerPlus series of high-voltage converters by STMicroelectronics. The series combines power MOSFETs with intelligent control logic to reduce external component count. The VIPER17 specifically targets general-purpose offline applications with moderate power requirements.

Replacement Considerations

The VIPER17LD is the tube-packaged equivalent of this device. Other VIPerPlus variants may offer different switching frequencies or power ratings but require circuit redesign due to pinout or parameter differences.

FAQ

What is the switching frequency of the VIPER17LDTR?

The VIPER17LDTR operates at a fixed frequency of 60 kHz, as indicated by the 'L' suffix in the part number.

Does the device include thermal protection?

Yes, it features hysteresis thermal shutdown that protects the device from overheating and allows safe auto-restart once the temperature decreases.