Description
●The FAN7930B is an active power factor correction (PFC) controller for boost PFC applications that operate in critical conduction mode (CRM). It uses a voltage-mode PWM that compares an internal ramp signal with the error amplifier output to generate a MOSFET turn-off signal. Because the voltage-mode CRM PFC controller does not need rectified AC line voltage information, it saves the power loss of an input voltage sensing network necessary for a current-mode CRM PFC controller.
●Features
● Additional OVP Detection Pin
● Input Voltage Absent Detection Circuit
● Maximum Switching Frequency Limitation
● Internal Soft-Start and Overshoot-less Control
● Internal Total Harmonic Distortion (THD) Optimizer
● Precise Adjustable Output Over-Voltage Protection
● Open-Feedback Protection and Disable Function
● Zero Current Detector
● 150μs Internal Startup Timer
● MOSFET Over-Current Protection
● 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)
●Applications
● Adapter
● Ballast
● LCD TV, CRT TV
● SMPS
