Integrated circuit with off-state diagnosis for driver channels
AssigneeSTMicroelectronics S.r.l.
InventorsGaudenzia BAGNATI, Marzia ANNOVAZZI, Diego ALAGNA, Lucia MAGGIO
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Abstract
An integrated circuit includes a plurality of power transistor driver channels for driving external loads. The driver channels can be selectively configured as high side or low side driver channels. The integrated circuit includes, for each driver channel, a respective analog test circuit and a respective controller. The integrated circuit includes a single counter connected to each of the controllers for simultaneously controlling off-state diagnosis timing windows for the driver channels.
Claims20
An integrated circuit, comprising:
- a first driver channel including:
- a first power transistor;
- and
- a first output terminal;
- a second driver channel including:
- a second power transistor;
- and
- a second output terminal;
- and
- a driver control system including:
- a first analog test circuit coupled to the first output terminal;
- a second analog circuit coupled to the second output terminal;
- a first controller coupled to the first analog test circuit;
- a second controller coupled to the second analog test circuit;
- and
- a counter coupled to the first controller and the second controller.
An integrated circuit, comprising:
- a plurality of driver channels for driving external loads, each driver channel including:
- a drain output terminal;
- and
- a source output terminal;
- a plurality of analog test circuits each coupled to a respective one of the plurality of driver channels;
- and
- a counter configured to generate timing windows for each of the plurality of analog test circuits to test the respective one of the plurality of driver channels.
A method, comprising:
- generating, with a counter of an integrated circuit, timing windows;
- providing the timing windows from the counter to a first controller and a second controller of the integrated circuit;
- controlling, with the first controller, testing of the first driver channel based on the timing windows;
- and
- controlling, with the second controller, testing of the second driver channel based on the timing windows.
Dependencies are inferred from the claim text.