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PDF L9473 Data sheet ( Hoja de datos )

Número de pieza L9473
Descripción CAR ALTERNATOR VOLTAGE REGULATOR
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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L9473www.DataSheet4U.com
CAR ALTERNATOR VOLTAGE REGULATOR
1 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
2 DESCRIPTION
The L9484 is a monolithic multifunction generator
Figure 2. Block Diagram
Figure 1. Package
Multiwatt8
Table 1. Order Codes
Part Number
L9473J
Package
Multiwatt8
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.
NTC
4
7
1
8
2
63
May 2005
Rev. 1
1/9

1 page




L9473 pdf
L9473
Figure 6. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open) www.DataSheet4U.com
15.0
14.8
14.6 14.73
14.4
14.2
14.0 14.12
13.8
13.6
13.4
14.63
14.00
14.43
13.78
13.2
13.0
-40
-20
0
20 40 60 80 100 120 140 160
Temp
Table 6. 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
VUV Under-Voltage
FP > FP-LRC , 10kohm between
S_term and VGO
10.95
11.8 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.
Table 7. 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
5/9

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