VIPER28HDTR

Overview

The VIPER28HDTR is an offline high-voltage converter from the VIPerPlus family, integrating a rugged 800V power MOSFET with PWM current-mode control. It operates at a fixed switching frequency of 115kHz with a maximum duty cycle of 80%. The device supports a Vcc supply range of 8.5V to 23.5V and features an internal startup circuit requiring 14V. Designed for flyback topologies, it delivers up to 16W of output power. Key electrical parameters include an 800V breakdown voltage and operation within a junction temperature range of -40°C to 150°C.

Feature Summary

• Integrates an 800V avalanche-rugged power MOSFET with embedded high-voltage startup and sense FETs.
• Features an adjustable Extra Power Timer (EPT) to sustain overload conditions for short durations while maintaining regulation.
• Includes comprehensive protection mechanisms such as dual-level overcurrent protection, output overvoltage protection, and thermal shutdown with hysteresis.
• Operates in burst mode under light load conditions to achieve low no-load consumption.

Applications

• Offline AC/DC converters for consumer electronics
• Adapters and chargers for portable devices
• Standby power supplies for appliances

Procurement Notes

Verify the specific suffix 'HDTR' corresponds to the 16-SOIC package and tape-and-reel packaging configuration. Confirm that the component meets RoHS3 compliance standards as indicated by the manufacturer's documentation. Ensure compatibility with the intended PCB footprint for the 16-SOIC form factor before finalizing procurement orders.

Selection Notes

Select this component for applications requiring a fixed 115kHz switching frequency and integrated high-voltage startup. It is suitable for designs needing extra power management capabilities via the EPT function. Consider the 16-SOIC package constraints and the 150°C maximum junction temperature rating when evaluating thermal performance and layout requirements for the target system.

Part Context

This part belongs to the VIPerPlus family of peak power fixed-frequency offline converters. It shares core architectural features with other variants like the VIPER28HE and VIPER28HN, differing primarily in package type and switching frequency specifications. The HD variant specifically utilizes the 115kHz frequency option within the broader VIPER28 product line.

Replacement Considerations

The VIPER28HE is a related part number within the same family but utilizes a different SDIP-10 through-hole package and may have distinct thermal characteristics. Verify pinout compatibility and package dimensions before substituting. No direct equivalent with identical packaging and electrical specs was identified in the provided data.