MC33099 Datasheet | Motorola Semiconductor

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 mon 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 acplished 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 pared 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 Freescale Semiconductor, Inc... DW SUFFIX CASE 751G-04 16-TERMINAL SOICW ORDERING INFORMATION Device MC33099DW/R2 MC33099CDW/R2 Temperature Range (TA) -40°C to 125°C Package 16 SOICW 33099Simplified Simplified Application Diagram Application Diagram PHASE GATE SOURCE PHASE FILTER FIELD WINDING IGN LAMP DRAIN BAT REMOTE LRC1 LRC2 AGND GND IGNITION SWITCH CHASSIS © Motorola, Inc....