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L9680 Datasheet(PDF) 253 Page - STMicroelectronics

Part # L9680
Description  Automotive advanced airbag IC for mid/high end applications
PDF  277 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 Datasheet(HTML) 253 Page - STMicroelectronics

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253/277
L9680
Electrical characteristics
276
16.17
Deployment driver diagnostic
16.17.1
Squib resistance measurement
All electrical characteristics are valid for the following conditions unless otherwise noted:
-40 °C
 Ta  +95 °C, VINGOOD0(max)  VIN  35 V, 6 V  SSxy  35 V, 7 V  SYNCBOOST
 35 V.
10
TFLT_ILIM_LS
Low side overcurrent to low
side deactivation deglitch
time in short to battery
condition
-
80
100
120
μs
11
TFLT_OS_LS
Low side overcurrent to high
side deactivation deglitch
time in case of intermittent
open to squib condition
--
-
20
μs
12
TOFF_OS_HS
High side OFF time in case
of intermittent open to squib
condition
-4
-
12
μs
Table 56. Deployment drivers – AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 57. Deployment drivers diagnostics - Squib resistance measurement
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1RSQ_RANGE_1 Squib resistance range 1
LPDIAGREQ(ISRC_CURR_
SEL) = 0
0
-
10.0
Ω
2RSQ_RANGE 2 Squib resistance range 2
LPDIAGREQ(ISRC_CURR_
SEL) = 1
0
-
50.0
Ω
3GRSQ
Squib resistance
measurement
Differential amplifier gain
VOUT_RSQ = GRSQ x [(VSF -
VSR)] + Voff_RSQ
-2%
5.2
+2%
V/V
4Voff_RSQ
Squib resistance
measurement
Differential amplifier offset
VOUT_RSQ = GRSQ x [(VSF –
VSR)] + Voff_RSQ
200
-
400
mV
5
ISRC_HI_SF
ISRC_HI_SR
Squib resistance
measurement
High current source
LPDIAGREQ(ISRC_CURR_
SEL) = 0
LPDIAGREQ(ISRC) = ‘01’ or
‘10’
-5%
40
+5%
mA
6
ISRC_LO_SF
ISRC_LO_SR
Squib resistance
measurement
Low current source
LPDIAGREQ(ISRC_CURR_
SEL) = 1
LPDIAGREQ(ISRC) =’01’ or
‘10’
-10%
8
+10%
mA
7ISRC_DELTA
Squib Resistance
Measurement
Delta Current Source
ISRC_HI_x - ISRC_LO_x
-5%
32
+5%
mA



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