KA7541

Lighting, Ballast Controllers Overview

The KA7541 is a dedicated fluorescent lamp electronic ballast controller manufactured by Fairchild Semiconductor. It operates within a supply voltage range of 11V to 30V and draws a supply current of 6 mA. The device supports operating frequencies between 44kHz and 56kHz, enabling efficient high-frequency operation for lighting applications. Designed for through-hole mounting, it utilizes an 8-DIP package with a width of 0.300 inches (7.62mm). The component functions as a complete control solution for resonant half-bridge topologies in compact fluorescent lamps.

Lighting, Ballast Controllers Feature Summary

• Integrated control logic for resonant half-bridge electronic ballast circuits
• Supports high-frequency operation suitable for fluorescent lamp starting and dimming
• Robust thermal design allowing operation across extended industrial temperature ranges

Lighting, Ballast Controllers Applications

• Compact fluorescent lamp (CFL) electronic ballasts
• Resonant half-bridge lighting driver circuits
• General-purpose fluorescent tube illumination systems

Lighting, Ballast Controllers Procurement Notes

Verify the specific suffix against official onsemi documentation to confirm pinout compatibility and environmental compliance status. Note that Fairchild Semiconductor has been integrated into onsemi; ensure ordering information reflects current manufacturer part numbers. Confirm package dimensions and lead finish specifications match the target PCB footprint requirements before finalizing procurement.

Lighting, Ballast Controllers Selection Notes

Select this component for designs requiring a dedicated, single-chip solution for fluorescent ballast control without external microcontroller intervention. Ensure the input power supply can maintain the required 11V to 30V operating range under all load conditions. Consider the 8-DIP package constraints for thermal management and board space allocation in enclosed lighting fixtures.

Lighting, Ballast Controllers Part Context

The KA7541 belongs to the family of specialized power management ICs developed for lighting applications. Historically produced by Fairchild Semiconductor, these components were designed to simplify the complex timing and drive requirements of fluorescent lamps. Following corporate integration, the product line continues under onsemi, maintaining its role in standardizing electronic ballast architectures for commercial and residential lighting markets.

Lighting, Ballast Controllers Replacement Considerations

Consult onsemi cross-reference tools for direct substitutes. Verify electrical parameters such as operating frequency range and supply voltage limits to ensure functional equivalence in existing ballast designs.