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FAN7930C

Fairchild Semiconductor
Part Number FAN7930C
Manufacturer Fairchild Semiconductor
Description Critical Conduction Mode PFC Controller
Published May 8, 2011
Detailed Description FAN7930C — Critical Conduction Mode PFC Controller October 2010 FAN7930C Critical Conduction Mode PFC Controller Featu...
Datasheet PDF File FAN7930C PDF File

FAN7930C
FAN7930C

Overview
FAN7930C — Critical Conduction Mode PFC Controller October 2010 FAN7930C Critical Conduction Mode PFC Controller Features ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ ƒ PFC-Ready Signal Input Voltage 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 SOP 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 voltagemode 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.
FAN7930C provides over-voltage protection (OVP), open-feedback protection, over-current protection (OCP), input-voltage-absent detection, and undervoltage lockout protection (UVLO).
The PFC-ready pin can be used to trigger other power stages when PFC output voltage reaches the proper level with hysteresis.
The FAN7930C 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 for Boundary Conduction Mode PFC Using FAN7930 Applications ƒ ƒ ƒ ƒ Adapter Ballast LCD TV, CRT TV SMPS Ordering Information Part Number www.
DataSheet4U.
com FAN7930CM FAN7930CMX Operating Temperature Range -40 to +125°C ...


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