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TC26xD 2.


Idle Air Throttle 8A Ch. Relays Solenoid 4x 1. Relays Solenoids 4x 1.

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By using freely infineon squib parameters, the regulator is able to operate even without any communication interface. Furthermore, it should be noted that the firing of the AIRBAG in an automobile typically requires a pair of field-effect transistors FETs in order to let the current flow through the series of them. Typically, one field-effect transistor of the pair of field-effect transistors is placed at each side of the squib. In order to decrease the area of the field-effect transistors FETs infineon squib silicon i. In FIG.

Infineon Automotive Application Guide

A infineon squib curve describes the maximum available current I SD as a function of time. For the circuit of FIG.

The complete timing is specified in the diagram of FIG. In other words, FIG.

Airbag system

The circuit of FIG. With reference to FIG. A supply circuit or a infineon squib regulator may be used to provide the supply voltage V SUP.

Charge-pumps are used to boost the voltage for firing circuits above the voltage supplied by the vehicle battery not shown here. A pre-charged capacitor can infineon squib used to supply power to the electronics if the vehicle battery becomes disconnected or damaged during a crash event.

Airbag system

For that reason, the pre-charged capacitor has to be really huge order of magnitude of some mF. Both a high-side switch and a low-side switch are closed during the firing pulse, when the proper command SA on their gates is generated by a microprocessor. In this way, a certain amount of current typically few amperes of current can infineon squib through the series connection consisting of field-effect transistorhigh-side switchsquib and low-side switch during a small period of time few millisecondsthus producing explosions. infineon squib

It should further be noted that the widespread infineon squib circuit used infineon squib explode the squib in AIRBAG deployment systems has a series of a high-side switch to the firing cap and of a low-side switch on the other side, as, for example, described in U. Furthermore, it should be noted that some circuits intended to define and limit the amount of current flowing through the series connection have already been proposed and studied.

Some possible solutions are shown in U. However, in the solutions of the prior art the silicon area of the driver transistorsand thus so far their infineon squib capacity has been increased so that the driver transistorscan infineon squib a high amount of energy.

Thus, the problem of a high cost by integrating a large silicon area of the driver transistors using a complex wafer manufacturing technology arises unless the special solution of U. It should further be noted that if both transistors used for firing are infineon squib activated simultaneously due to some chip-internal fault, this leads to a faulty firing with the consequence that an airbag unfolds without the relative external reason. This can lead to serious accidents. With the solution proposed in U.

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If the additional power element is normally switched off, an infineon squib explosion can be avoided. In the shown configuration, the gate voltage of the external N-type channel field-effect transistor FET is generated by a constant voltage source The output the source terminal of the additional power element is driven in a source-follower infineon squib, wherein the source voltage is determined directly by the value of the gate voltage. However, in normal operation mode different from the firing mode, i. Moreover, with the configuration presented in U. Accordingly, there is still a possibility that a malfunction is not detected. From the above discussion it can be concluded that the prior-art solutions may still comprise severe drawbacks and bring along serious design problems or even security risks.

Besides, the power switches in conventional systems may be typically rather slow due to the introduction of stabilizing networks.The device allows individual control of up to infineon squib squib devices in CrosSaveTM standard configuration. It provides also a communication solution with a Master. Current limitation for each firing loop. Embedded Diagnostic Functions. Squib resistance Measurement with programmable gain. Programable Squib Infineon squib.

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