Product Brief TLE 7714/7734 4 Loop Airbag Deployment ASSP CrosSave

Product Brief
TLE 7714/7734
4 Loop Airbag Deployment ASSP
CrosSave TM
Embedded Safing Functions
T h e T L E 7 7 1 4 / 3 4 is intended to be used in an Automotive Restrain
Two different technologies in one package
control module. The device allows individual control of up to four squib devices
■
in CrosSave standard configuration. It provides also a communication solution
■
Hard coded firing current level
with a Master µC device (MCU) via a 16-Bit full duplex 8 MHz SPI interface. The IC
■
Programmable (SPI) channel enable register
is equipped with the required hardware to avoid or enable deployment as well as
■
TM
Internal fault monitoring
BDTIC
provide a full list of diagnostic functions.
Applications
■
Automotive Restraint Applications
VS
Analog
Supply
Features
HS Gate
Supply
Temperature
Sensor
4x
■
Four independent squib channels with high-side and low-side switch
■
Four independent programmable deployment firing timer
■
Digital inputs allow independent safing logic to prevent/enable deployment
■
All digital I/O pins are 3.3 V and 5 V compatible
■
16-Bit full duplex 8 MHz SPI
■
Multiplexed analog output for signal monitoring
FLENH
HSENQ
REFH
HSS
SSxy
SFx SF1
HS
Internal
Biasing
Interconnect
AGND
Interconnect
4x
SRx
Embedded Protection Functions
■
40 V capability of all device pins (except all Ground and Return pins)
■
Thermal and short circuit protection for each switch
■
Current limitation for each firing loop
■
Average temperature measurement
Embedded Diagnostic Functions
■
High accuracy squib resistance measurement
■
Leakage detection to GND and Battery on feed and return pins
■
Measurement of internal and external voltages
■
Deployment Firing Timer check (DFT check)
■
Switch Test of high-side and low-side driver
■
High-side gate-driver supply test
SGxy
LS
Ground loss
Detection
CH_EN
Channel Mask
Register
CSQ
MOSI
MISO
RESQ
CLK
SPI
Interface &
Decoder
Status
Register
Control
CLK logic
www.infineon.com/restraint-system-IC
Automotive Power
www.BDTIC.com/infineon
LSEN
Temperature
Sensor
VCC
CLK-SPI
FLENL
Crack/Corrosion
Protection
Squib Leakage
Measurement
Squib
Resistance
Measurement
REFRM
SRDU
Voltage
Measurement
AO
Internal
Biasing
VDD5_REF
REFL
Product Brief
CrosSaveTM – Safer with two Dies in one Package
VBOOST
Increased Safety
using two different technologies
Decoupling with One Device
reduced Bill of Material (BoM)
CrosSaveTM
Squib w/Airbag
Small 52-pin Power Package
saving board space
Improved System FMEA
more safety in one package
BDTIC
Product Summary
Type
Sales Code
Description
Package
TLE 7714
Available upon request
4 Loop Firing IC (1.75 A @ 0.5 ms)
PG-DSO-52
TLE 7734
Available upon request
4 Loop Firing IC (1.2 A @ 2 ms)
PG-DSO-52
System Overview
Pedestrian Protection
Bonnet
Passenger Sensing
High Speed CAN
Airbag ECU
y
Doors
Front Airbag
Safing
Engine
(XC866)
TLE 7729
SatRICTM
ER
Curtains
CrosSaveTM
Buck
Buck
TLE7714
TLE7734
4 Loop
Safing Signals
TLE 6711
Battery
TLE7718
TLE7738
8 Loop
g
x
g
g
XC164
MCU
Smart Power
Switch
CrosSave
Buckle
Switch
TM
Buck
Buckle
Switch
VBOOST
VBAT
VSAT & VSYNC
I/O
VLOGIC
Legal Disclaimer
The information given in this Product Brief shall in no event be
regarded as a guarantee of conditions or characteristics
(“Beschaffenheitsgarantie”). With respect to any examples or hints
given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies
hereby disclaims any and all warranties and liabilities of any kind,
including without limitation warranties of non-infringement of
intellectual property rights of any third party.
How to reach us:
http://www.infineon.com
Published by
Infineon Technologies AG
81726 Munich, Germany
© Infineon Technologies AG 2006.
All Rights Reserved.
Information
For further information on technology, delivery terms and
conditions and prices please contact your nearest
Infineon Technologies Office (www.infineon.com).
Warning Lamp
Airbag Off
Warnings
Due to technical requirements components may contain
dangerous substances. For information on the types in question
please contact your nearest Infineon Technologies Office.
Infineon Technologies Components may only be used in lifesupport devices or systems with the express written approval
of Infineon Technologies, if a failure of such components can
reasonably be expected to cause the failure of that life-support
device or system, or to affect the safety or effectiveness of that
device or system.
Life support devices or systems are intended to be implanted in
the human body, or to support and/or maintain and sustain
and/or protect human life. If they fail, it is reasonable to assume
that the health of the user or other persons may be endangered.
Ordering No. B112-H8943-X-X-7600
Printed in Germany
PS 1106.5 nb
www.BDTIC.com/infineon
Published by Infineon Technologies AG
Passenger
DualStage
p
Left Door
TLE 7259
LIN
Occupant
DualStage
g
Sensor SPI
TLE 7729
SatRICTM
p
Front Impact
Side Airbag
TLE 6250
CAN
Firing SPI
Side Impact
Right Door
p
p
g