VIPER15LN

Overview

The VIPER15LN is a high-voltage offline switch from the VIPer+ family, integrating an 800 V avalanche-rugged power MOSFET with a PWM current-mode controller. It utilizes quasi-resonant control for valley switching to minimize switching losses and EMI. The device features embedded high-voltage startup, eliminating external bias components. Key protections include adjustable overvoltage protection, on-board soft-start, and hysteretic thermal shutdown with safe auto-restart capabilities.

Feature Summary

• Integrates an 800 V avalanche-rugged power MOSFET with a PWM current-mode controller
• Employs quasi-resonant control for efficient valley switching operation
• Includes embedded high-voltage startup and sense-FET for simplified design
• Features adjustable overvoltage protection and safe auto-restart after fault conditions

Applications

• Adapters for PDA, camcorders, shavers, cellular phones, cordless phones, and videogames
• Auxiliary power supply for LCD/PDP TV, monitors, audio systems, and computers
• Industrial power supply applications requiring isolated flyback conversion

Procurement Notes

Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package integrity and pin alignment against the 7-DIP specification. Ensure compliance with RoHS standards as indicated in official documentation. Request detailed datasheets and application notes for circuit validation prior to integration into final designs.

Selection Notes

Select this component for low-power offline AC/DC converter designs requiring high voltage tolerance. The integrated 800 V MOSFET supports wide input voltage ranges. Quasi-resonant operation enhances efficiency at light loads. Consider the 7-DIP package for through-hole mounting requirements. Evaluate thermal management needs given the operating temperature range up to 150 °C junction temperature.

Part Context

The VIPER15LN belongs to the VIPer+ series of high-voltage converters by STMicroelectronics. This series combines robust power stages with advanced control logic to reduce external component count. The VIPer15 variant specifically targets general-purpose offline applications, offering a balance of performance, protection, and cost-effectiveness for consumer and industrial electronics.

Replacement Considerations

Direct substitutes include the VIPER16LN and VIPER17LN. These alternatives offer similar functionality within the same family but may differ in specific output configurations or current ratings. Verify pin compatibility and electrical parameters before substitution.