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US 2021/0359600 A1Published application
Electronic Control Unit
AssigneeHitachi Astemo, Ltd.
InventorsYuta MIFUNE, Koichi TSUKIO
Life of this patent
Estimating the term…
Abstract
A drive circuit is controlled when power is interrupted. When power is turned off, a main power supply is switched to a sub-power supply, and a residual charge of a step-up circuit is lowered to a drive voltage of a drive circuit using a step-down circuit is used as the sub-power supply.
Claims12
An electronic control unit comprising:
- a first circuit that drives a load;
- a second circuit used as a power supply of the first circuit;
- a third circuit that controls the first circuit;
- and
- a first switch that is interposed between the second circuit and the third circuit and is energized after cutting off supply of a reference power supply from an outside.
2 more elements
An electronic control unit comprising:
- a second circuit used as a power supply of a first circuit;
- and
- a first switch connecting the second circuit to a third circuit,
- wherein the first switch is turned on after cutting off power supply to the second circuit such that a charge remaining in the second circuit is consumed by the third circuit.
1 more element
Dependencies are inferred from the claim text.