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PDF L9484 Data sheet ( Hoja de datos )
| Número de pieza | L9484 | |
| Descripción | CAR ALTERNATOR VOLTAGE REGULATOR | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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L9484
CAR ALTERNATOR VOLTAGE REGULATOR
PRODUCT PREVIEW
s FOR AIR AND LIQUID COOLED
APPLICATIONS
s AMBIENT AIR TEMPERATURE
(THERMISTOR) COMPENSATED
s SPECIAL DEFAULT COMPENSATION
CURVE WITH TS-TERMINAL OPEN
s COMPENSATION CURVE WITH
APPLICATION SPECIFIC RESISTOR ON TS
s THERMAL PROTECTION
s FIELD DRIVER, LAMP DRIVER, RELAY
DRIVER, AND DF (FIELD MONITOR) SHORT
CIRCUIT PROTECTED
s LOAD RESPONSE CONTROL
s SINGLE PHASE AUTOSTART
DESCRIPTION
The L9484 is a monolithic multifunction generator
MULTIWATT8
ORDERING NUMBER: L9484
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.
Figure 1. Typical Application SchematicPIN DESCRIPTION
NTC
4
7
1
8
2
63
February 2003
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/8
1 page  
L9484
DIAGNOSTIC (Tcase = -35°C to +150°C unless otherwise specified)
Symbol
Parameter
Conditions
Min. Typ. Max. Units
VOV Over-Voltage
VSP + 1 VSP + VSP + 2
1.3
V
VL-SAT Lamp ON Saturation Voltage IL = 0.5A (sinked by ASVR)
>VL-ACT 1.33
1.45
V
VL-SAT-BO Lamp ON Voltage 2
IL < 0.5A, VGO = Open; Tcase = -
35°C to 85°C
3.8 5
V
VL-RLY Lamp OFF (Relay Drive)
Saturation Voltage (vs. B+)
IL = 750mA (Sourced by ASVR)
3 Tcase < 125C
1.85
V
TDELAY Fault Indication Delay Time
Delay before Lamp ON
0.9 1.1 1.3
s
2. 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.
3. When no fault is detected the Lamp terminal is pulled up by ASVR.
FAULT INDICATION TABLE
Conditions
Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec ± 15% after initial KEY-ON)
VGO > VOV
VP < VP-F AND VGO < VSP
FP < FP-TR @ VP-TR
No Connection Between Battery and VGO
At Start: Lamp ON until FP>FP-IR AND VP>VP-F. i.e. until VP reaches 8V.
TDelay?
No
Yes
Yes
Yes
No
No
REGULATION FEATURES
Symbol
Parameter
Conditions
VL-PD L Terminal Regulator Activate
Threshold
VGO=12.6V
IL-PD L Terminal Pull Down Current
VL = VL-ACT
VGO=12.6V
VP-IR Initiate Regulation Phase Voltage Regulator Activated
Threshold
VP-TR Terminate Regulation Phase
Voltage Threshold
Regulator Activated
VP-F Phase Input Voltage Low FAULT
Threshold
IP Phase Terminal Current Sink
VP > 1.5V and < 12.6V
VGO = 12.6V
FP-IR Initiate Regulation Phase
Frequency
Min.
0.8
Typ.
1
Max.
1.15
Unit
V
0.09 0.78 mA
1.1 1.3 1.5
V
1.1 1.3 1.5
V
7.0 8 9.0 V
0.3 3.5 mA
123 145 167
Hz
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5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet L9484.PDF ] | |
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