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MC33099 Datasheet(PDF) 1 Page - Motorola, Inc |
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MC33099 Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 20 page MOTOROLA SEMICONDUCTOR TECHNICAL DATA © Motorola, Inc. 2004 Document order number: MC33099 Rev 4.0, 07/2004 33099 Simplified Application Diagram 33099 FIELD WINDING IGNITION SWITCH CHASSIS PHASE GATE SOURCE PHASE FILTER BAT IGN LAMP DRAIN AGND LRC1 LRC2 REMOTE GND 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 applied to the system at low engine RPM. Four LRC rates are selectable. The 33099 uses a feedback voltage to establish an alternator field current that is in harmony with system load currents. The output voltage is monitored by an internal voltage divider scheme and compared to an internal voltage ramp referenced to a bandgap voltage. This approach provides precision output voltage control over a wide range of temperature, electrical loads, and engine RPM. Features • External High-Side MOSFET Control of a Ground-Referenced Field Winding • LRC Active During Initial Start •Vset at ±0.1 V @ 25°C • <0.1 V Variation Over Engine Speeds of 2,000 to 10,000 RPM • <0.2 V Variation Over 10% to 95% of Maximum Field Current • Controlled MOSFET and Field Flyback Diode Recovery Characteristics for Minimum RFI • Trimmed Devices Available at 14.6 V and 14.8 V (typical) Vset ALTERNATOR VOLTAGE REGULATOR ORDERING INFORMATION Device Temperature Range (TA) Package MC33099DW/R2 -40°C to 125°C 16 SOICW MC33099CDW/R2 DW SUFFIX CASE 751G-04 16-TERMINAL SOICW 33099 Simplified Application Diagram Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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