VIPER27HD

Overview

The VIPER27HD is a fixed-frequency, high-performance offline high voltage converter from the VIPerPlus family. It integrates an 800 V rugged power MOSFET with a PWM controller in a single package. The device operates at a switching frequency of 115 kHz and supports flyback topology. Key electrical parameters include a maximum input voltage of 23.5 V, a maximum output voltage of 800 V, and a current limit of 0.74 A. It features a 7-pin PDIP package with a maximum operating temperature of 150°C.

Feature Summary

• Integrates an 800 V avalanche rugged power section with PWM control for compact design.
• Includes two levels of over-current protection, overvoltage protection, and hysteretic thermal shutdown.
• Features soft-start capability and safe auto-restart functionality following fault conditions.
• Supports burst mode operation to achieve low standby power consumption.

Applications

• Universal input AC/DC converters
• Offline switch-mode power supplies
• Battery chargers

Procurement Notes

Verify the specific suffix 'HD' confirms the 7-pin PDIP package and 115 kHz frequency variant. Confirm RoHS compliance status via the official datasheet before integration. Ensure the ordering part number matches the required packaging format. Cross-reference the manufacturer's latest revision history for any pinout or parameter updates prior to final procurement.

Selection Notes

Select this component for applications requiring a fixed 115 kHz switching frequency. The 800 V rating suits high-voltage offline environments. Verify that the 0.74 A current limit meets the load requirements. Consider the 7-pin DIP package constraints for PCB layout. Evaluate EMI performance needs against the integrated jittering feature specifications.

Part Context

This device belongs to the VIPerPlus family of high-voltage converters. It shares architectural similarities with other members like the VIPER26 and VIPER27 series variants. The 'H' designation typically indicates the higher 115 kHz operating frequency compared to lower frequency alternatives within the same product line.

Replacement Considerations

Direct substitutes may include other VIPerPlus family members such as the VIPER26HD or VIPER27HN, provided the package and frequency requirements align. Verify pin compatibility and electrical ratings before substitution.

FAQ

What is the switching frequency of the VIPER27HD?

The VIPER27HD operates at a fixed frequency of 115 kHz.

Does the VIPER27HD support auto-restart after a fault?

Yes, the device includes a safe auto-restart function after any fault condition is removed.