MAGENTA YELLOW CYAN Microcontrollers' Tribute Enabling

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MAGENTA YELLOW CYAN Microcontrollers' Tribute Enabling

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Transceivers automotive applications interfaces harsh environment
transceiver controller supplied with power voltage regulator, makes sense integrate voltage regulator, transceiver, other diagnosis driver functions package. Because ever-increasing demand information exchange modern vehicles; Infineon already taken this integration step conventional parallel interfaces between various control modules producing wire will supplying various products solid state harness thick your longer viable from economic technical point (Smart-Power-Technology) next months.
view. order prevent this, automotive industry European companies have Performance decided implement data communications using serial 2-wire (Controller Area plays extremely important role Network) bus. This Infineon Technologies oriented developments systems because wide frequency range raditowards microcontrollers with implemented protocol machine. ated, affecting neighbouring systems extreme Current Needs
Typically modern car, rain sensor needs communicate dashboard control module, conditioning system talk seat module, steering assist module want exchange information with vehicle dynamics system, door electronics could require communication vehicle alarm system. address these communications needs, 'Automotive Power' department Infineon Technologies began development transceivers about years ago. Johann Winter, Product Manager Transceiver, Heiner Technical Marketing Manager Transceiver, Infineon Technologies, Munich cases, causing electronic systems fail. However, radiation only worry, susceptibility transceivers irradiated also problem. cabling system acts like antenna absorb considerable amount energy depending conditions, which transceiver must resistant. possible fault source continual waking systems that sleep mode. parked vehicle this leads significant increase battery power consumption, which reduces service life.
from harsh signals that occur bus. Shielding provided from network environmental influences such voltage spikes that occur lines, interference pulses that affect communication masked out. Three protocol-based systems currently today.
High Speed CAN:
high-speed system used almost global basis power train, airbag systems order achieve fastest possible data transfer speed, which usually less than 500kBaud (maximum 1Mbaud) with little radiation possible.
Figure Results Strip-Line
Fault-Tolerant Low-Speed CAN:
Figure High Speed Fault Tolerant Speed Network
These transceivers link between protocol unit (the controller) physical transmission medium (bus cable). well providing line driving function, transceivers also provide wide range protective fault diagnosis functions. Depending transceiver type, 'low power modes' available that control mode entire control module turning power supply accordance with requirements. controller signals transferred transceivers. Both single-wire transceivers so-called 'dual wire' transceivers that transfer differential signal available. Signals coming from recevied back controller. transceiver also protects controller decoupling micro
This system differs from high-speed network first glance because significantly slower maximum transfer speed 125kBaud. However, unlike above-described system, direct battery operation (terminal capability) possible, since provided 'low power' modes guarantee very power consumption monitor control module power supply same time. system sleep mode, wake-up signals detected transceiver local wake-up input system automatically woke This system also outstanding fault management system, which automatically detects line faults such short circuits open circuits switches from differential operation single-wire transfer order maintain communication. application area vehicle's widespread body convenience system, applications such door control module, seat memory, dashboard, conditioning lighting module. upper class vehicles maximum possible number control modules already been reached.
Figure Results:
Single-Wire Low-Speed CAN:
Figure Comparison between fault-tolerant low-speed high-speed transceivers
Particularly popular within market, this system mainly used convenience area communicates 33kBaud during normal transmission speed. Unlike two-wire system, singlewire transceiver allows network operated using reduced number nodes. Control modules that sleep mode order reduce power consumption allowed stay sleep mode during normal communications. entire system woken until so-called wake-up call generated transferring message higher voltage level. INFINEON TECHNOLOGIES Tel. +49-89-2342220 System Within ECU: +49-911-9783321 Since these systems connected micro- enter 4508 controller every control module since both www.epn-info.com
operational mode system affect transceiver receiver circuits much that messages falsified communication fails altogether. Integrating logic (C-MOS, analogue) power components (D-MOS), Infineon improved performance. results comparison tests with competitive products shown following example TLE6250G high-speed transceiver. Figures show results radiated emissions. strip-line process that used automotive area process (Direct Power Injection) were both measured.
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MAGENTA YELLOW CYAN Microcontrollers' Tribute Enabling

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