CS1601H-FSZ

Overview

The CS1601H-FSZ is a digital power factor correction (PFC) controller designed for electronic ballast applications. It operates in variable frequency discontinuous conduction mode (VF-DCM) with zero-current switching to optimize total harmonic distortion (THD). The device supports switching frequencies up to 100kHz and integrates feedback compensation, safety features including undervoltage lockout and thermal shutdown, and digital EMI noise shaping.

Feature Summary

• Digital EMI noise shaping reduces conducted electromagnetic interference
• Adaptive switching frequency control minimizes boost inductor size
• Integrated feedback compensation simplifies system design
• Comprehensive safety features include cycle-by-cycle current limiting

Applications

• LED Power Supply/Driver
• Fluorescent Ballasts
• HID Ballasts

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm RoHS compliance and package integrity upon receipt. Check for specific manufacturing date codes if long-term reliability is required. Ensure storage conditions meet moisture sensitivity level requirements before reflow soldering.

Selection Notes

Select this controller for designs requiring low PFC system cost and best-in-class THD performance. Suitable for applications needing zero-current switching efficiency. Consider the 100kHz maximum operating frequency when designing magnetic components. Verify compatibility with traditional boundary mode controller pin placements for direct replacement scenarios.

Part Context

Part of the Cirrus Logic CS1601 series, specifically the H variant optimized for higher frequency operation up to 100kHz compared to the standard CS1601's 70kHz limit. Designed as a digital solution to replace analog controllers in electronic ballast systems while reducing component count and improving performance metrics.

Replacement Considerations

CS1601: Standard version limited to 70kHz switching frequency.