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FL7930B — Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting
October 2013
FL7930B
Single-Stage Flyback and Boundary-Mode PFC
Controller for Lighting
Features
Additional OVP Detection Pin
V
IN
-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)
150 μs Internal Startup Timer
MOSFET Over-Current Protection (OCP)
Under-Voltage Lockout with 3.5 V Hysteresis
Low Startup and Operating Current
Totem-Pole Output with High State Clamp
+500/-800
mA Peak Gate Drive Current
8-Pin, Small-Outline Package (SOP)
Description
The FL7930B 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
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