IR21571

Lighting, Ballast Controllers Overview

The IR21571 is a fully integrated ballast control IC designed for driving rapid start fluorescent lamps. It features a built-in 600V high-voltage level-shifted gate driver, supporting operation within a frequency range of 45.5kHz to 50.5kHz and a supply voltage range of 10.5V to 16.5V. The device provides programmable parameters including preheat time, operating frequency, dead-time, and dimming interfaces. It integrates protection mechanisms such as filament detection, undervoltage lockout, thermal overload protection, and lamp fault detection with auto-restart capabilities.

Lighting, Ballast Controllers Feature Summary

• Fully integrated control and gate drive functionality for electronic ballasts
• Built-in 600V high-side gate driver with internal Zener clamp
• Programmable preheat timing and operating frequency settings
• Comprehensive protection against lamp faults, over-temperature, and low bus voltage

Lighting, Ballast Controllers Applications

• Rapid start fluorescent lamp ballasts
• Straight tube lighting fixtures
• Dual-lamp parallel or series configurations
• High power factor electronic ballast designs

Lighting, Ballast Controllers Procurement Notes

Verify the specific suffix (e.g., D, SPBF, STRPBF) to confirm package type and lead-free status. Confirm that the component is sourced from Infineon Technologies, following their acquisition of International Rectifier. Ensure the part number matches the required pinout and electrical specifications for your specific ballast topology before procurement.

Lighting, Ballast Controllers Selection Notes

Select this IC for applications requiring a compact, single-chip solution for rapid start fluorescent lamps. It is suitable for designs needing integrated protection and programmable timing without external complex logic. Consider the 600V rating for half-bridge topologies and verify compatibility with the target lamp's preheat requirements.

Lighting, Ballast Controllers Part Context

Originally developed by International Rectifier, the IR21571 was introduced around 2005. Following the acquisition of International Rectifier by Infineon Technologies in 2014, the product line was integrated into Infineon's portfolio. The brand name International Rectifier is no longer used, but the technology remains part of Infineon's lighting solutions.

Lighting, Ballast Controllers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.