Description
The FAN7930C 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
ƒ  PFC-Ready Signal
ƒ  Input Voltage Absent Detection
ƒ  Maximum Switching Frequency Limitation
ƒ  Internal Soft-Start and Startup without Overshoot
ƒ  Internal Total Harmonic Distortion (THD) Optimizer
ƒ  Precise Adjustable Output Over-Voltage Protection
ƒ  Open-Feedback Protection and Disable Function
ƒ  Zero-Current Detector (ZCD)
ƒ  150μs Internal Startup Timer
ƒ  MOSFET Over-Current Protection (OCP)
ƒ  Under-Voltage Lockout with 3.5V Hysteresis
ƒ  Low Startup and Operating Current
ƒ  Totem-Pole Output with High State Clamp
ƒ  +500/-800mA Peak Gate Drive Current
ƒ  8-Pin SOP

APPLICATIONs
ƒ  Adapter
ƒ  Ballast
ƒ  LCD TV, CRT TV
ƒ  SMPS