L9484
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2.4 Diagnostic
2.5 Fault indication
2.6 Regulation features
Table 6. Diagnostic
(T
case
= -35C to +150C unless otherwise specified)
Symbol Parameter Conditions Min. Typ. Max. Units
V
OV
Over-voltage V
SP
+ 1
V
SP
+
1.3
V
SP
+ 2 V
V
L-SAT
Lamp ON saturation voltage I
L
= 0.5A (sinked by ASVR) >V
L-ACT
1.33 1.45 V
V
L-SAT-BO
Lamp ON voltage
(1)
I
L
< 0.5A, VGO = open; T
case
= -
35C to 85C
3.8 5 V
V
L-RLY
Lamp OFF (relay drive)
saturation voltage (vs. B+)
I
L
= 750mA (sourced by
ASVR)
(2)
Tcase < 125C
1.85 V
T
DELAY
Fault indication delay time Delay before lamp ON 0.9 1.1 1.3 s
1. 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.
2. When no fault is detected the Lamp terminal is pulled up by ASVR.
Table 7. Fault indication table
Conditions T
Delay
?
Initial KEY-ON Bulb and wiring check (lamp ON for 1 sec 15% after initial KEY-ON) No
V
GO
> V
OV
Ye s
V
P
< V
P-F
AND V
GO
< V
SP
Ye s
F
P
< F
P-TR
@ V
P-TR
Ye s
No connection between battery and V
GO
No
At start: lamp ON until F
P
>F
P-IR
AND V
P
>V
P-F
. i.e. until V
P
reaches 8V. No
Table 8.
Regulation features
Symbol Parameter Conditions Min. Typ. Max. Unit
V
L-PD
L terminal regulator activate
threshold
VGO=12.6V 0.8 1 1.15 V
I
L-PD
L terminal pull down current
V
L
= V
L-ACT
VGO=12.6V
0.09 0.78 mA
V
P-IR
Initiate regulation phase voltage
threshold
Regulator activated 1.1 1.3 1.5 V
V
P-TR
Terminate regulation phase
voltage threshold
Regulator activated 1.1 1.3 1.5 V