PROBLEM TO BE SOLVED: To provide an airbag ignition device that ensures an operating state without damage to a switching element even in the event that a failure occurs due to short circuit.SOLUTION: An air bag ignition device comprises a Low-side transistor 14 disposed downstream of a squib 20. Since the Low-side transistor 14 is overheated according to the presence or absence of a failure due to short-circuit, excess current flows in an overheat protection function protecting the Low-side transistor 14 and in the Low-side transistor 14. Therefore, at least one of excess current protection functions protecting the Low-side transistor 14 is operated or the content of the operation of the at least one function is altered.SELECTED DRAWING: Figure 1
【課題】天絡した時でも、スイッチング素子が損傷せずに動作状態が確保されるエアバッグ点火装置を提供する。【解決手段】エアバッグ点火装置は、スクイブ20の下流に配置されるLow側トランジスタ14を備え、天絡状態の有無に応じて、Low側トランジスタ14が過熱されることからLow側トランジスタ14を保護する過熱保護機能及びLow側トランジスタ14に過電流が流れることからLow側トランジスタ14を保護する過電流保護機能の内の少なくとも1つの機能を動作させるか、又は少なくとも1つの機能の動作内容を変更する。【選択図】図1
AIRBAG IGNITION DEVICE
エアバッグ点火装置
2018-06-14
Patent
Electronic Resource
Japanese
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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