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US 11,309,705 B2Granted
Semiconductor device
AssigneeRenesas Electronics Corporation
InventorAkio Kamimoto
Life of this patent
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Abstract
A semiconductor device includes a bridge circuit comprising first to fourth elements, a first diagnostic circuit that detects a potential difference between two intermediate nodes of the bridge circuit and a control circuit that detects a failure of the first or second element based on an output of the first diagnostic circuit, wherein the first and second elements are first and second power transistors connected in series.
Claims15
A semiconductor device comprising:
- a bridge circuit that includes first to fourth elements;
- a first diagnostic circuit that detects a potential difference between two intermediate nodes of the bridge circuit;
- and
- a control circuit that detects a failure of the first element or the second element based on an output of the first diagnostic circuit,
- wherein the first and second elements are first and second power transistors connected in series,
- wherein the first power transistor receives power supply from a battery and is a reverse connection protection transistor of the battery,
- wherein the first diagnostic circuit has a first voltage determination circuit that determines whether the potential difference between the two intermediate nodes is equal to or greater than a predetermined value,
- wherein the third and fourth elements are first and second sense transistors connected in series, and
- wherein the first voltage determination circuit determines a potential difference between a first intermediate node to which the first and second power transistors are connected and a second intermediate node to which the first and second sense transistors are connected.
6 more elements
A semiconductor device comprising:
- a bridge circuit that includes first to fourth elements;
- a first diagnostic circuit that detects a potential difference between two intermediate nodes of the bridge circuit;
- and
- a control circuit that detects a failure of the first element or the second element based on an output of the first diagnostic circuit, wherein the first and second elements are first and second power transistors connected in series,
- wherein the first power transistor receives power supply from a battery and is a reverse connection protection transistor of the battery,
- wherein the first diagnostic circuit has a first voltage determination circuit that determines whether the potential difference between the two intermediate nodes is equal to or greater than a predetermined value,
- wherein the third and fourth elements are first and second resistors connected in series, and
- wherein the first voltage determination circuit determines a potential difference between a first intermediate node to which the first and second power transistors are coupled and a second intermediate node to which the first and second resistors are coupled.
5 more elements
Dependencies are inferred from the claim text.