VIPER26LDTR

Overview

The VIPER26LDTR is an offline switch from the VIPerPlus family, integrating a high-voltage power MOSFET with PWM current mode control. It features an 800 V avalanche-rugged drain and operates at a fixed switching frequency of 60 kHz. The device supports a supply voltage range of 11.5 V to 23.5 V with a startup voltage of 13 V. It delivers up to 20 W output power in flyback topologies. Key electrical parameters include a maximum duty cycle of 80% and a typical operating supply current of 2.5 mA. The component is housed in a 16-SO surface-mount package.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET with a PWM controller for compact design
• Features jittered switching frequency to reduce electromagnetic interference filter costs
• Includes embedded high-voltage startup circuitry and sense-FET technology
• Provides comprehensive protection mechanisms including thermal shutdown and auto-restart

Applications

• Isolated flyback converters with optocouplers
• Primary-side regulation power supplies
• Non-isolated buck and buck-boost converters
• Low-power consumer electronics adapters

Procurement Notes

Verify the specific suffix 'L' indicates the 60 kHz frequency variant when sourcing replacements. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the SO-16 package dimensions match the target PCB footprint requirements. Validate that the 800 V breakdown rating aligns with the intended input voltage stress conditions.

Selection Notes

Select this component for designs requiring low standby power consumption and minimal external component count. The integrated HV startup eliminates the need for auxiliary windings. Consider the 60 kHz frequency for cost-effective EMI filtering compared to higher frequency variants. Ensure the application benefits from the built-in soft-start and hysteretic thermal protection features.

Part Context

This part belongs to the VIPerPlus series of monolithic high-voltage switches. It combines a 700 V or 800 V MOSFET with intelligent control logic. The VIPER26LD specifically denotes the 800 V breakdown voltage and 60 kHz operation. It is designed to replace discrete solutions in low-power AC-DC conversion applications.

Replacement Considerations

The VIPER26LD is a parameter-equivalent alternative. Verify pinout compatibility and thermal characteristics before substitution.

FAQ

What is the switching frequency of the VIPER26LDTR?

The VIPER26LDTR operates at a fixed switching frequency of 60 kHz.

Does the VIPER26LDTR support primary-side regulation?

Yes, the device supports isolated flyback converters with optocouplers as well as primary-side regulation topologies.