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L9678P датащи(PDF) 183 Page - STMicroelectronics

номер детали L9678P
подробное описание детали  Automotive user configurable airbag IC
PDF  203 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P датащи(HTML) 183 Page - STMicroelectronics

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DocID029274 Rev 3
183/203
L9678P, L9678P-S
Electrical characteristics
202
15.17
Squib diagnostic
15.17.1
Squib resistance measurement
All electrical characteristics are valid for the following conditions unless otherwise noted.
-40 °C
 Ta  +95 °C, VINGOOD1(max)  VIN  35 V, 6 V  SSxy  35 V; 7V  VRESDIAG 
35V.
Table 48. Deployment drivers diagnostics (Squib resistance)
N°
Symbol
Parameter
Condition
Min
Typ
Max
Unit
1RSQ_RANGE_1
Squib Resistance
Range 1
LPDIAGREQ(ISRC_CURR_SEL)= 0
0
-
10
Ω
2RSQ_RANGE_2
Squib Resistance
Range 2
LPDIAGREQ(ISRC_CURR_SEL)= 1
0
-
50
Ω
3GRSQ
Squib resistance
measurement
differential amplifier
gain
-
-2%
5.2
+2%
V/V
4VOFF_RSQ
Squib Resistance
Measurement
Differential Amplifier
Output 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
RSQ_RANGE = 1 Ωto 10 Ω
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
RSQ_RANGE = 1 Ωto 50 Ω
LPDIAGREQ(ISRC_CURR_SEL) = 1
LPDIAGREQ(ISRC) = "01" or "10"
-10%
8
+10%
mA
7ISRC_DELTA
Squib Resistance
Measurement
Delta Current Source
--5%
32
+5%
mA
8SRISRC
Squib resistance
measurement
current source slew-
rate
-4
7.5
11
mA/µs
9VSRx_RM
SRx voltage during
Resistance
Measurement
LPDIAGREQ(ISRC) = ”01” or “10”
LPDIAGREQ(ISINK) = 1
0.5
0.7
1
V
10
ISINK_HI_SR
SRx current sink limit
high level
LPDIAGREQ(ISRC_CURR_SEL) = 0
LPDIAGREQ(ISINK) = 1
50
70
90
mA
11
ISINK_LO_SR
SRx current sink limit
low level
LPDIAGREQ(ISRC_CURR_SEL) = 1
LPDIAGREQ(ISINK) = 1
10
17.5
25
mA
12
IPD_SR
SRx current pull down
-
0.7
1
1.3
mA
13
RLKG_SF
Leakage resistance on
SFx
Leakage to GND ±1 V or to Battery
from 6 V to 18 V. Design info
1-
-
kΩ



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