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L9473STN/a125avaiCAR ALTERNATOR VOLTAGE REGULATOR


L9473 ,CAR ALTERNATOR VOLTAGE REGULATORBlock DiagramNTC4 178263Rev. 1May 2005 1/9L9473 Table 2. PIN DESCRIPTIONN° Pin Description1V Gener ..
L9474 , ALL SILICON VOLTAGE REGULATOR
L9484 ,CAR ALTERNATOR VOLTAGE REGULATORABSOLUTE MAXIMUM RATINGSSymbol Parameter Value UnitOutput Current Capability INTERNALLY LIMITED APo ..
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L9473
CAR ALTERNATOR VOLTAGE REGULATOR
1/9
L9473

May 2005 FEATURES 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 DESCRIPTION
The L9484 is a monolithic multifunction generator
Voltage regulator intended for use in automotive
charging applications.
This All Silicon Voltage Regulator regulates the out-
put of an automotive generator by controlling the field
winding current by means of a variable frequency
PWM high side driver.
CAR ALTERNATOR VOLTAGE REGULATOR
Figure 2. Block Diagram

Rev. 1
L9473
Table 2. PIN DESCRIPTION
Figure 3. PIN CONNECTION (Top view)
Table 3. ABSOLUTE MAXIMUM RATINGS
Table 4. THERMAL DATA
3/9
L9473

Notes: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/
°C (for example, Field Drive shall be capable of ≥7.2A at 100°C).
Table 5. ELECTRICAL CHARACTERISTCS

(Tcase = -35°C to +150°C continuous unless otherwise specified)
L9473
Figure 4. Set-Point Voltage vs. Mounting Tab Temperature (10kΩ between VGO & TS)
Figure 5. Set-Point Voltage vs. Thermistor Temperature, Tj = 90°C (Not guaranteed by testing,
depending on NTC characteristics)
5/9
L9473
Figure 6. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open)
Table 6. 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.
Table 7. FAULT INDICATION TABLE
L9473
Table 8. REGULATION FEATURES
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