Overview
The CS1601 and CS1601H are digital power factor correction (PFC) controllers designed to deliver the lowest PFC system cost in electronic ballast applications. The controller operates in a variable frequency discontinuous conduction mode (VF-DCM) with zero-current switching optimized to deliver best-inclass THD and minimize the size and cost of magnetic components. The CS1601 operates at switching frequencies of up to 70kHz, and the CS1601H operates at frequencies of up to 100kHz.

Features
❐ Low PFC System Cost
❐ Best-in-class THD
❐ Digital EMI Noise Shaping Reduces Conducted EMI
❐ Adaptive Switching Frequency Control Minimizes Boost Inductor Size
❐ High Efficiency Due to Zero-current Switching
❐ Integrated Feedback Compensation Simplifies System Design
❐ Comprehensive Safety Features
    • Undervoltage Lockout (UVLO)
    • Output Overvoltage Protection
    • Cycle-by-cycle Current Limiting
    • Input Voltage Brownout Protection
    • Open/Short Loop Protection for IAC & IFB Pins
    • Thermal Shutdown
❐ Pin Placement Similar to Traditional Boundary Mode (CRM) Controllers

Applications
❐ LED Power Supply/Driver
❐ Fluorescent Ballasts
❐ HID Ballasts