Abstract The airbag squib drivers have the LS_FET operated in R ds_on mode. However to protect the LS_FET against short-to-battery conditions, a current regulation or current limitation is necessary. In this chapter the current regulation of the LS_FET with a senseFET-based current sensing scheme is described. It describes the challenges that are needed to stabilize the LS_FET for the R-L-C loads. The same load conditions applied to the HS_FET apply to the LS_FET. The targeted current limit is 3 A for 2 ms. Similar to the HS_FET, the LS_FET needs energy limitation in the unpowered state in order to prevent inadvertent deployment of the squib.
Low-Side Current Regulation and Energy Limitation
29.12.2017
19 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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