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L9680 数据表(PDF) 23 Page - STMicroelectronics

部件名 L9680
功能描述  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  286 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L9680 数据表(HTML) 23 Page - STMicroelectronics

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DS11615 Rev 7
23/286
L9680
Overview and block diagram
285
5
Overview and block diagram
The L9680 IC is an application specific standard component air bag system chip. Its main
functions include, power management, deployment drivers, remote sensor interfaces (PSI-5
satellite sensors or active wheel speed sensors), diagnostics, deployment arming, hall-
effect sensor interface, general purpose output drivers, watchdog timer, microcontroller
failsafe input and control and a dedicated passenger airbag disarm signal. A block diagram
for this IC is shown in Figure 2.
Figure 2. Device function block diagram
GAPGPS02248
ER Boost Regulator
(23V / 33V)
SYNC Boost
Regulator
(12V)
SAT Buck Regulator
(8V)
Energy Reserve
Crossover Control
VCC Buck Regulator
(3.3V/ 5V)
ER CAP Diagnostics
and
Charge Control
Remote Sensor
Interface
Deployment Drivers
Configurable
General Purpose
Output Drivers
DC Sensor
Interface
Wake-up &
Power Moding
Control
Global Configuration &
Control
Remote Sensor
Configuration &
Control
Arming, Scrapping & CPU Integrity Monitor
Watchdog
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
WAKEUP
VIN
ERBSTSW
ERBOOST
VER
SYNCBSTSW
SYNCBOOST
SATGND
X
X
X
MCUFAULTB
Bias, Diagnostics & ADC
X
X
X
RSU0
X
RSU1
RSU2
RSU3
X
X
X
X
X
X
X
X
……..
SSAB
SF0
SR0
X
X
X
X
X
X
SFB
SRB
X
BSTGND
X
HSSREG
X
VSF
SATSYNC
X
X
X
X
X
X
X
X
X
X
X
X
GNDSUB1 /
Exposed Pad
X
X
X
VBATMON
X
SS01
X
WD2_LOCKOUT
GNDSUB2 /
Exposed Pad
X



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