©2003 Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev 1.0.2

Features

• Internal start-up timer

• Internal R/C filter eliminates the need for an external

R/C filter

• Very precise adjustable output over voltage protection

• Zero current detector

• One quadrant multiplier

• Trimmed 1.5% internal band gap reference

• Under voltage lockout with 3V of hysteresis

• Totem pole output with high state clamp

• Low start-up and operating current

• 8-Pin DIP or 8-Pin SOP

Applications

• Electronic ballast

•SMPS

Description

The FAN7527B provides simple and high performance

active power factor correction. The FAN7527B is optimized

for electronic ballasts and low power and high density power

supplies which require minimum board size, reduced

external components and low power dissipation. Because the

R/C filter is included in the current sense block, the external

R/C filter is not necessary. Special circuitry has also been

added to prevent no load runaway conditions. Regardless of

the supply voltage, the output drive clamping circuit limits

the overshoot of the power MOSFET gate drive. It greatly

enhances the system reliability.

FAN7527B

Power Factor Correction Controller

8-DIP

8-SOP

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