UNISONIC TECHNOLOGIES CO., LTD

UA7527

Preliminary

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2011 Unisonic Technologies Co., Ltd

QW-R114-003.b

POWER FACTOR

CONTROLLER

DESCRIPTION

The UTC UA7527 is a simple and high performance active

power factor corrective controller for boost PFC application which

operates in the critical conduction mode. The UTC UA7527 is

optimized for electronic ballasts, low power and high density

power supplies which require minimum board area reduced

component count and low power dissipation. Internal R/C filter

eliminates the need for an external R/C filter. Special circuitry has

also been added to prevent no load runaway conditions. The

output drive clamping circuit limits the overshoot of the power

MOSFET gate drive despite the supply voltage. This greatly

enhances the system reliability.

FEATURES

* Internal Start-up Timer

* Very Precise Adjustable Output Over Voltage Protection

* Zero Current Detector

* Quadrant Multiplier

* Internal R/C Filter Eliminates the Need for an External R/C Filter

* 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

SOP-8

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

UA7527L-S08-R

UA7527G-S08-R

SOP-8

Tape Reel

UA7527L-S08-T

UA7527G-S08-T

SOP-8

Tube