Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Reexamination Certificate
2005-06-14
2005-06-14
Jackson, Stephen W. (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
C701S045000
Reexamination Certificate
active
06906900
ABSTRACT:
System and method protects power drivers (10) and (12) that are used for airbag deployment. Temperature sensors (38) are strategically located on the integrated circuit (36) to detect temperature levels in power drivers (10) and (12). When the temperature in the power drivers (10) and (12) reaches a maximum level, an output is provided to logic block (26). Current detecting circuit (24) provides an output when the current flowing in power driver (10) reaches a desired level. Timing circuit (28) is activated when it receives the output from current detecting circuit (24). At the expiration of the time, timing circuit (28) provides an output to logic block (26). When logic block (26) receives both outputs, logic block (26) shuts drivers (10) and (12) down. When temperature sensors (38) detects that the temperature in integrated circuit (36) has reached a minimum level, logic block (26) reactivates drivers (10) and (12).
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Bennett Paul T.
Chiriac Victor A.
Edwards William E.
Lee Tien-Yu Tom
Putti David D.
Benenson Boris
Freescale Semiconductor Inc.
Jackson Stephen W.
King Robert L.
Winarski Tyson Y.
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