L9484 ,CAR ALTERNATOR VOLTAGE REGULATORABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitOutput Current Capability INTERNALLY LIMITED APo ..
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L9484
CAR ALTERNATOR VOLTAGE REGULATOR
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L9484February 2003 FOR AIR AND LIQUID COOLED
APPLICATIONS AMBIENT AIR TEMPERATURE
(THERMISTOR) COMPENSATED SPECIAL DEFAULT COMPENSATION
CURVE WITH TS-TERMINAL OPEN COMPENSATION CURVE WITH
APPLICATION SPECIFIC RESISTOR ON TS THERMAL PROTECTION FIELD DRIVER, LAMP DRIVER, RELAY
DRIVER, AND DF (FIELD MONITOR) SHORT
CIRCUIT PROTECTED LOAD RESPONSE CONTROL SINGLE PHASE AUTOSTART
DESCRIPTIONThe L9484 is a monolithic multifunction generator
Voltage regulator intended for use in automotive
charging applications. This All Silicon Voltage Regu-
lator regulates the output of an automotive generator
by controlling the field winding current by means of a
variable frequency PWM high side driver.
PRODUCT PREVIEWCAR ALTERNATOR VOLTAGE REGULATOR
Figure 1. Typical Application SchematicPIN DESCRIPTION
L9484 2/8
PIN CONNECTION (Top view)
ABSOLUTE MAXIMUM RATINGS
THERMAL DATANotes:1. The Field Drive capability shall not decrease as a function of temperature between 25°C and 150°C, at a rate faster than -0.024A/
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L9484°C (for example, Field Drive shall be capable of ≥7.2A at 100°C).
ELECTRICAL CHARACTERISTCS (Tcase = -35°C to +150°C continuous unless otherwise specified)
L9484 4/8
Figure 2. Set-Point Voltage vs. Mounting Tab Temperature (10kΩ between VGO & TS)
Figure 3. Set-Point Voltage vs. Thermistor Temperature, Tj = 90°C (Not guaranteed by testing,
depending on NTC characteristics)
Figure 4. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open)
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L9484
DIAGNOSTIC (Tcase = -35°C to +150°C unless otherwise specified) This condition can happen when the connection between the battery and VGO or the output terminal of the generator is broken.
The 1.1 second delay is not required, and current is sinked by ASVR. When no fault is detected the Lamp terminal is pulled up by ASVR.
FAULT INDICATION TABLE
REGULATION FEATURES
L9484 6/8
REGULATION FEATURES (continued)
