FL7930CMX データシートの表示（PDF） - Fairchild Semiconductor

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FL7930CMX

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

Fairchild Semiconductor 

March 2011

FL7930

Single-Stage Flyback and Boundary-Mode PFC

Controller for Lighting

Features

 Additional PFC-Ready Function (FL7930C Only)

 Input-Voltage-Absent-Detection Circuit

 Maximum Switching Frequency Limitation

 Internal Soft-Start with Overshoot Prevention

 Internal Total Harmonic Distortion (THD) Optimizer

 Precise Adjustable Output Over-Voltage Protection

 Additional OVP Detection Pin (FL7930B Only)

 Open-Feedback Protection and Disable Function

 Zero-Current Detector

 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 Small Outline Package (SOP)

Applications

 Ballast

 General LED Lighting

 Industrial, Commercial, and Residential Fixtures

 Outdoor Lighting: Street, Roadway, Parking,

Construction and Ornamental LED Lighting Fixtures

Description

The FL7930 is an active Power Factor Correction (PFC)

controller for low-to high-power lumens 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.

FL7930 provides over-voltage, open-feedback, over-

current, input-voltage-absent detection, and under-

voltage lockout protections. The FL7930 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.

The FL3930B provides an additional OVP pin that can

be used to shut down the boost power stage when

output voltage exceeds OVP level due to damaged

resistors connected at the INV pin. The FL7930C

provides a PFC-ready pin can be used to trigger other

power stages when PFC output voltage reaches the

proper level (with hysteresis).

Ordering Information

Part Number

Operating

Temperature Range

Top Mark

Package

FL7930BM

FL7930BMX

FL7930CM

FL7930CMX

-40 to +125°C

FL7930B

FL7930C

8-Lead Small Outline Package (SOP)

© 2011 Fairchild Semiconductor Corporation

FL7930 • Rev. 1.0.0

Packing

Method

Rail

Tape & Reel

Rail

Tape & Reel

www.fairchildsemi.com

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