UNISONIC TECHNOLOGIES CO., LTD

UAC33092

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2011 Unisonic Technologies Co., Ltd

QW-R121-003,C

ALTERNATOR VOLTAGE

REGULATOR

DESCRIPTION

The UAC33092 is specifically designed for voltage regulation and

Load Response Control (LRC) of diode rectified alternator charging

systems, as commonly found in automotive applications.

In maintaining system voltage, the UAC33092 monitors and

compares the system battery voltage to an externally programmed

set point value and pulse width modulates an N–channel MOSFET

transistor to control the average alternator field current.

FEATURE

*Forced Load Response Control (LRC) with Heavy Load Transitions

at Low RPM

*Capable of Regulating Voltage to ±0.1 V @ 25℃

*Operating Frequency Selectable with One External Resistor

*< 0.1 V Variation over Speed Range of 2000 to 10,000 RPM

*< 0.4 V Variation over 10% to 95% of Maximum Alternator Output

*Maintains Regulation with External Loads as Low as 1.0 A

*Load Dump Protection of Lamp, Field Control Devices, and Loads

*Duty Cycle Limit Protection

*Provides High Side MOSFET Control of a Ground Referenced Field

Winding

*Controlled MOSFET and Flyback Diode Recovery Characteristics

for Minimum RFI

*Optional 2.5 or 10 sec. LRC Rate Control (Osc. Freq. = 280 kHz)

*Undervoltage, Overvoltage and Phase Fault (Broken Belt) Detection

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ORDERING INFORMATION

Ordering Number

Lead Free

Halogen Free

Package

Packing

UAC33092L-S20-R

UAC33092G-S20-R

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Tape Reel

UAC33092L-S20-T

UAC33092G-S20-T

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Tube

UAC33092L-S24-R

UAC33092G-S24-R

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Tape Reel

UAC33092L-S24-T

UAC33092G-S24-T

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Tube