Freescale Semiconductor, Inc.
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Document order number: MC33099 Rev 4.
0, 07/2004
33099 Adaptive Alternator Voltage
Regulator
The 33099 is designed to regulate the output voltage in diode-rectified alternator charging systems common to automotive applications.
The 33099 provides either an analog or digital fixed frequency duty cycle (ON/OFF ratio) control of an alternator’s field current.
Load Response Control (LRC) of the alternator field current is accomplished by selecting the duty cycle for prevailing engine conditions to eliminate engine speed hunting and vibrations caused by abrupt torque loading of the engine owing to sudden electrical loads being ap...