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FL7930B

Single-Stage Flyback and Boundary-Mode PFC Controller for Lighting

ON Semiconductor 

October 2013

FL7930B

Single-Stage Flyback and Boundary-Mode PFC

Controller for Lighting

Features

 Additional OVP Detection Pin

 VIN-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)

Applications

 Ballast

 General LED Lighting

 Industrial, Commercial, and Residential Fixtures

 Outdoor Lighting: Street, Roadway, Parking,

Construction, Ornamental LED Lighting Fixtures

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

CRM PFC controller.

FL7930B provides over-voltage protection (OVP), open-

feedback protection, over-current protection (OCP),

input-voltage-absent detection, and under-voltage

lockout protection (UVLO). The additional OVP pin can

be used to shut down the boost power stage when

output voltage exceeds OVP level due to the resistors

that are connected at INV pin are damaged. The

FL7930B can be disabled if the INV pin voltage is lower

than 0.45 V and the operating current decreases to a

very low level. Using a new variable on-time control

method, total harmonic distortion (THD) is lower than in

conventional CRM boost PFC ICs.

Ordering Information

Part Number

Operating

Temperature Range

FL7930BMX_G

-40 to +125°C

Top Mark

FL7930BG

Package

8-Lead Small Outline Package (SOP)

Packing

Method

Tape & Reel

© 2010 Fairchild Semiconductor Corporation

FL7930B • Rev. 1.0.4

www.fairchildsemi.com

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