Circuit for diagnosing open circuit in airbag driving device
AssigneeHyundai Mobis Co., Ltd.
InventorChung Hoon Cho
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Abstract
A circuit for diagnosing an open circuit in an airbag driving device may include: an open circuit sensing unit configured to sense, in a test mode for diagnosing an open circuit in a power ground (PGND) of the airbag driving device, whether an open circuit is present in the power ground (PGND) of the lower switch (L_SW) using power (VH) that is applied through an upper switch (H_SW) and the lower switch (L_SW) of the airbag driving device, and an open circuit determination unit configured to receive a voltage (VDrop) sensed by the open circuit sensing unit and determine whether the power ground (PGND) is open through a comparison between the voltage (VDrop) and a preset first reference voltage (VPG_TH).
Claims9
A circuit for diagnosing an open circuit in an airbag driving device, comprising:
- an open circuit sensing unit configured to sense, in a test mode for diagnosing an open circuit in a power ground of the airbag driving device, whether an open circuit is present in the power ground of a lower switch using power that is applied through an upper switch and the lower switch of the airbag driving device;
- and
- an open circuit determination unit configured to receive a voltage sensed by the open circuit sensing unit and determine whether the power ground is open through a comparison between the voltage and a preset first reference voltage.
Dependencies are inferred from the claim text.