Product Brief TLE 7718/7738 8 Loop Airbag Deployment ASSP CrosSave TM Embedded Safing Functions T h e T L E 7 7 1 8 / 3 8 is intended to be used in an Automotive Restrain control module. The device allows individual control of up to eight squib devices ■ Two different technologies in one package 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 ■ Internal fault monitoring TM provide a full list of diagnostic functions. Applications ■ Automotive Restraint Applications HSS VS Analog Supply Features ■ Eight independent squib channels with high-side and low-side switch ■ Eight 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 HS Gate Supply Temperature Sensor 8x SSxy FLENH SFx SF1 HSENQ REFH HS Internal Biasing Interconnect AGND Interconnect 8x 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 www.infineon.com/restraint-system-IC Automotive Power SGxy LS FLENL Ground loss Detection CH_EN Channel Mask Register LSEN Temperature Sensor VCC CLK-SPI CSQ MOSI MISO RESQ CLK SPI Interface & Decoder Status Register Control CLK logic 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 Product Summary Type Sales Code Description Package TLE 7718 Available upon request 8 Loop Firing IC (1.75 A @ 0.5 ms) PG-DSO-52 TLE 7738 Available upon request 8 Loop Firing IC (1.2 A @ 2 ms) PG-DSO-52 System Overview Pedestrian Protection Bonnet Passenger Sensing High Speed CAN Airbag ECU Safing Engine (XC866) TLE 7729 SatRICTM ER Buck Buck TLE7714 TLE7734 4 Loop Safing Signals CrosSave Buck Buckle Switch VBAT VSAT & VSYNC I/O VLOGIC Published by Infineon Technologies AG 81726 Munich, Germany © Infineon Technologies AG 2006. All Rights Reserved. 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. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Published by Infineon Technologies AG Buckle Switch TM VBOOST How to reach us: http://www.infineon.com Doors Front Airbag TLE 6711 Battery Curtains CrosSaveTM g x g g y TLE7718 TLE7738 8 Loop Passenger DualStage p Left Door XC164 MCU Smart Power Switch Occupant DualStage g Sensor SPI TLE 7729 SatRICTM p Front Impact Side Airbag TLE 7259 LIN TLE 6250 CAN Firing SPI Side Impact Right Door p p g 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-H8942-X-X-7600 Printed in Germany PS 1106.5 nb