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L9678P Datasheet(PDF) 171 Page - STMicroelectronics

Part # L9678P
Description  Automotive user configurable airbag and battery cut-off IC
PDF  215 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678P Datasheet(HTML) 171 Page - STMicroelectronics

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DS11626 Rev 9
171/216
L9678P, L9678P-S
Applications
214
15
Applications
The main applications for this IC are two:
as user configurable airbag IC
as pyro fuse manager IC
15.1
Application circuit
Figure 58. Airbag application
SFx
SRx
ACL
DCSx
FENH
GPODx
GPOSx
ARM
C28÷C31
C20÷C23
C24÷C27
C10
D7÷D8
uC_FLEN
VSF
C15
Q3
D5
C17
C16
C18÷C19
SSxy
LOAD
GNDSUBx
R7
CVDD
GNDD
D7÷D8
DCSx
D
GPODx
GPOSx
uC_FLEN
C16
ACL
FENH
F
ARM
C10
CVDD
GNDD
G
SFx
SRx
ACL
C28÷
8
8 C31
C20÷
0
0 C23
C24÷
4
4 C27
C18÷
8
8 C19
SSxy
LOAD
VRESDIAG
SGxy
FENL
RSUx
D3
ISOK
C7
C13÷C14
L9678P
L9678P-S
DC
Sensor
Interface
D1
ERBSTSW
ERBOOST
VER
BATT
ER
BOOST
ER Charge
ER
Switch
Battery
Monitor
C6
R2
VBATMON
VIN
C1
C2
R1
L1
C3
D2
C4
C5
CVDD
Regulator
System control & configuration
WAKEUP
BVDD5
BSTGND
VDDQ
BVSUP
VDD5
VDD5
Linear
Regulator
VDD3V3
Linear
Regulator
VSUP
Linear
Regulator
C11
VSUP
Remote
Sensor
Interface
ISO9141
Transceiver
ISOTX
ISORX
GNDISO
GPO
Driver
VSF
Regulator
Squib
drivers
Safing
Logic
IGN
VDD3V3
GNDA
C8
R3
C9
C12
Q1
R4
R5
D4
VINT3V3
Linear
Regulator
R6
R9
R8
Q2
D6
uC_DIAGEN
R11
R14
R12÷R13
R15
Q5
ERBOOST
Close after
power-up
R10
Q4
D9
U1



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