FAN7930 Datasheet | Fairchild Semiconductor

Features - - - - - - - - - - - - - - - PFC Ready Signal Input Voltage Absent Detection Circuit 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 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/-800m A Peak Gate Drive Current 8-Pin SOP Description The FAN7930 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 pares 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. FAN7930 provides over-voltage protection, openfeedback protection, over-current protection, inputvoltage-absent detection, and under-voltage lockout protection. The PFC-ready pin can be used to trigger other power stages when PFC output voltage reaches the proper level with hysteresis. The FAN7930 can be disabled if the INV pin voltage is lower than 0.45V and the operating current decreases to a very low level. Using a new variable on-time control method, THD is lower than the conventional CRM boost PFC ICs. Related Resources AN-8035 - Design Consideration Conduction Mode PFC Using FAN7930 for Boundary Applications - - - - Adapter Ballast LCD TV, CRT TV SMPS Ordering Information Part Number FAN7930M -40 to +125°C FAN7930MX FAN7930 8-Lead Small Outline Package (SOP) Tape & Reel Operating Temperature Range Top Mark Package Packing Method Rail © 2010 Fairchild Semiconductor Corporation FAN7930 - Rev....