CS1501-FSZR

The CS1501 is a high-performance digital power factor correction (PFC) controller designed for switching mode power supply (SMPS) applications. The CS1501 actively manages the power factor correction while achieving high efficiency over a wide load range.

The CS1501 adaptively controls the input AC current so that it is in phase with the AC mains voltage and its waveform mimics the input voltage waveform. The PFC controller executes adaptive digital algorithms designed to shape the AC mains input current waveform to be in phase with the input voltage waveform.

The CS1501 is equipped with a zero-current detection (ZCD) circuit providing the PFC digital controller the capability to turn on the MOSFET when the voltage across the drain and source is near zero. Additionally, a current-sensing circuit is incorporated for instantaneous overcurrent protection.

• Digital EMI Noise Shaping
• Adaptive Digital Energy Controller
  • Excellent efficiency under all load and line conditions
  • Zero-voltage switching topology
• Minimal external devices required
• Adaptive digital control loop
• Comprehensive Safety Features
  • Under voltage Lockout (UVLO)
  • Output Overvoltage Protection
  • Cycle-by-cycle Current Limiting
  • Open/Short Loop Protection for IAC & IFB Pins
  • Thermal Shutdown
• Pin placement similar to traditional boundary mode (CRM) Controllers