VIPER16LN

Overview

The VIPER16LN is an off-line converter from the VIPER16 series, integrating an 800 V avalanche rugged power section with a PWM controller. It operates at a switching frequency of 60 kHz and supports a supply voltage range of 11.5 V to 23.5 V. The device provides a maximum output current of 400 mA with a regulated output voltage of 3.3 V. Designed for through-hole installation in a 7-pin PDIP package, it functions within a temperature range of -40 °C to 150 °C. Key electrical parameters include a maximum input voltage of 23.5 V and a minimum input voltage of 11.5 V.

Feature Summary

• Integrates an 800 V avalanche rugged power MOSFET with PWM control for high-voltage offline applications.
• Features hysteretic thermal protection and safe auto-restart capabilities following fault conditions.
• Eliminates the need for auxiliary bias windings by powering directly from rectified mains.
• Incorporates advance frequency jittering to reduce electromagnetic interference filter costs.

Applications

• Low power AC-DC converters
• Battery chargers
• Standby power supplies

Procurement Notes

Verify the specific suffix 'L' confirms the 60 kHz operating frequency variant when sourcing. Ensure the procurement documentation explicitly states the 7-pin PDIP package type to match mechanical constraints. Confirm RoHS compliance status as required by regional regulations. Cross-reference the manufacturer part number against official STMicroelectronics databases to avoid counterfeit components. Validate that the component is marked as active or in production if long-term availability is critical.

Selection Notes

Select this component for designs requiring integrated high-voltage startup without auxiliary windings. The 60 kHz frequency suits applications where moderate EMI filtering is acceptable. Consider the 800 V breakdown voltage for wide input voltage ranges. Evaluate the 400 mA output capability against load requirements. The through-hole package is suitable for prototyping or robust industrial environments.

Part Context

The VIPER16LN belongs to the VIPER16 family of power management ICs from STMicroelectronics. This series is designed for cost-effective, high-reliability offline power supplies. The 'L' designation specifically indicates the 60 kHz switching frequency variant, distinguishing it from other frequency options within the same product line.

Replacement Considerations

Check for VIPER16LH for higher frequency operation. Verify pinout compatibility with existing PCB layouts before substituting. Ensure thermal performance meets system requirements for alternative packages.