L9473 datasheet(5/9 Pages) STMICROELECTRONICS

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L9473

Figure 6. Set-Point Voltages vs. Mounting Tab Temperature (TS-Open)

Table 6. DIAGNOSTIC (Tcase = -35

°C to +150°C unless otherwise specified)

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

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

VOV

Over-Voltage

VSP + 1

VSP +

1.3

VSP + 2

VUV

Under-Voltage

FP > FP-LRC , 10kohm between

S_term and VGO

10.95

11.8

VL-SAT

Lamp ON Saturation Voltage

IL = 0.5A (sinked by ASVR)

>VL-ACT

1.33

1.45

VL-SAT-BO Lamp ON Voltage 2

IL < 0.5A, VGO = Open; Tcase = -

°C to 85°C

3.8

VL-RLY

Lamp OFF (Relay Drive)

Saturation Voltage (vs. B+)

IL = 750mA (Sourced by ASVR)

3 Tcase < 125C

1.85

TDELAY

Fault Indication Delay Time

Delay before Lamp ON

0.9

1.1

1.3

Conditions

TDelay?

Initial KEY-ON Bulb and Wiring Check (Lamp ON for 1 sec

± 15% after initial KEY-ON)

VGO > VOV

Yes

VP < VP-F AND VGO < VSP

Yes

FP < FP-TR @ VP-TR

Yes

No Connection Between Battery and VGO

At Start: Lamp ON until FP>FP-IR AND VP>VP-F. i.e. until VP reaches 8V.

14.73

14.63

14.43

14.12

14.00

13.78

13.0

13.2

13.4

13.6

13.8

14.0

14.2

14.4

14.6

14.8

15.0

-40

-20

100

120

140

160

Temp