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Title:
DRIVER CIRCUIT, CONTROL DEVICE, AND PROTECTION METHOD FOR DRIVER CIRCUIT
Document Type and Number:
Japanese Patent JP2018046670
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a driver circuit, a control device, and a protection method for the driver circuit, capable of notifying of presence or absence of failure of temperature detection unit in a driver circuit.SOLUTION: In a control device 1, a driver circuit 3 includes a driver part 4, a first temperature detection part 5, an over temperature protection part 6, a second temperature detection part 8, and a failure diagnostic part 7. The driver part 4 causes a drive current to be supplied to a load on the basis of a control signal inputted from a controller 2. The first temperature detection part 5 outputs a signal corresponding to a detected temperature. The over temperature protection part 6 cuts off the drive current to the load if a signal level outputted by the first temperature detection part 5 exceeds a temperature threshold value. The second temperature detection part 8 outputs a signal corresponding to a detected temperature to the controller 2. The failure diagnostic part causes cut off of the drive current to the load if it determines that the first temperature detection part 5 fails, and causes the second temperature detection part 8 to output a signal at a level corresponding to a temperature out of a detectable temperature range with the second temperature detection part 8 to the controller 2.SELECTED DRAWING: Figure 1

Inventors:
KUME MASAYOSHI
KOMIYA MOTOKI
Application Number:
JP2016179946A
Publication Date:
March 22, 2018
Filing Date:
September 14, 2016
Export Citation:
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Assignee:
DENSO TEN LTD
International Classes:
H02H5/04
Attorney, Agent or Firm:
Sakai International Patent Office