Efficient Power Factor Correction in Critical Conduction Mode

The FAN7930C Power Factor Correction (PFC) Controller is an advanced solution specifically designed for boosting PFC applications operating in critical conduction mode (CRM). With its voltage-mode PWM technology, this controller eliminates the need for rectified AC line voltage information, reducing power loss from the input voltage sensing network. The FAN7930C offers energy-efficient power factor correction for improved performance.

Advanced Features for Optimal PFC Operation

Safety and optimal operation are ensured with the FAN7930C's comprehensive features. It includes over-voltage protection, open-feedback protection, over-current protection (OCP), input-voltage-absent detection, and under-voltage lockout protection (UVLO). The PFC-ready pin allows for triggering other power stages when the PFC output voltage reaches a specific level with hysteresis.

The FAN7930C employs a variable on-time control method that reduces total harmonic distortion (THD), surpassing conventional CRM boost PFC ICs. The device features an 8-pin small outline package, a totem-pole output with high state clamp, low startup and operating current, and MOSFET over-current protection (OCP).

Key Features:

• PFC-Ready Signal
• VIN-Absent Detection
• Maximum Switching Frequency Limitation
• Internal Soft-Start and Startup without Overshoot
• Internal Total Harmonic Distortion (THD) Optimizer
• Precise Adjustable Output Over-Voltage Protection
• Open-Feedback Protection and Disable Function
• Zero-Current Detector (ZCD)
• 150µs Internal Startup Timer
• MOSFET Over-Current Protection (OCP)
• Under-Voltage Lockout with 3.5V Hysteresis
• Low Startup and Operating Current
• Totem-Pole Output with High State Clamp
• +500/-800mA Peak Gate Drive Current
• 8-Pin Small Outline Package (SOP)

Technical Features Table: