L9660 Datasheet, PDF (13/49 Pages) STMicroelectronics – Quad squib driver ASIC for safety application

L9660
Electrical specifications
Table 7. Squib deployment drivers and diagnostics - DC electrical characteristics (continued)
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
t_FETtimeout FET time-out
High squib resistance diagnostics
Normal Conditions
-
-
100
µs
R_SQHIZ
High load resistance
threshold
-
1.07
-
2.1
k
I_HR
High resistance current
threshold
-
I_STG
mA
From/CS  until test results
t_DIAGTIMEOUT MOS diagnostic delay time are valid, CSQHx = 0.12µF
-
CSQLx = 0.12µF
-
300
µs
Squib resistance diagnostics
V_OH
Output voltage AOUT
V_OL
I_Z
Tri-State Current AOUT
High saturation voltage;
I_AOUT = -500µA
Low Saturation Voltage;
I_AOUT = +500µA
AOUT = VDD
AOUT = 0V
R_{SQB RANGE} Load resistance range
-
V_AOUT
Resistance measurement
analog output tolerance
V_AOUT
VDD 
=
9^----.^-17----5^--
+


0.08

-^R----^S-_---^Q----^B--_
0  R_SQB < 3.5
3.5  R_SQB  10
VDD-
0.2
-
-
V
-
-
0.2
V
-
-
1
µA
-1
-
µA
0
-
10.0

V_AOUT-
0.095V
-
V_AOUT+
0.095V
V
V_AOUT·
0.95V
-
V_AOUT·
1.05V
V
I_SRC
Resistance measurement
current source
V_DD = 5.0V; V_SDIAG = 7.0V
to 37V
38
-
42
mA
I_SINK
Resistance measurement
current sink
IPD OFF, VSQLx = 4 V
45
-
57
mA
I_SLEW
V_cmpr
Rmeas current di/dt
Voltage threshold on squib
pin to shutdown ISRC
30% - 70% of ISRC
-
2
-
11 mA/µs
2.65
-
3.25
V
t_isrcshtdwn
VLSDrsqb
Shutdown time
Guaranteed by design
LSD (V_SQL) voltage during
resistance measure
-
-
-
30
µs
0.8
-
2.2
V
t_{R_WAIT} Rmeas wait time
Wait time before AOUT
voltage is stable for ADC
reading R AOUT= 5.1k;
-
C_AOUT=10nF
-
300
µs
FENx input pins
t_FENfilter
I_FENPD
Minimum pulse width
Internal pull-down current
-
VIN = VIL to VDD
12
-
16
µs
20
-
50
µA
DocID024714 Rev 2
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