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Communication protocol

  • US 9,407,253 B2
  • Filed: 03/08/2013
  • Issued: 08/02/2016
  • Est. Priority Date: 04/20/2012
  • Status: Active Grant
First Claim
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1. A method of adding a sensing capability to a device driver for driving a high-voltage power-switching device of a power switching apparatus having device-side circuitry comprising the power-switching device and the device driver and having control-side circuitry comprising a driver controller, the device driver arranged to be coupled to the driver controller by a communications link, the device driver arranged to drive the power-switching device on or off in response to a switching signal received on said communications link from the driver controller, the device driver further arranged to transmit an acknowledge signal to the driver controller in response to the, said acknowledge signal being detectable at the driver controller as valid, the method comprising:

  • outputting with a sense circuit an indication of a condition of said device-side circuitry; and

    modulating with a modulation circuit the acknowledge signal dependent on said condition indication prior to said transmission and to transmit the modulated acknowledge signal by said device driver to the driver controller in response to the received switching signal and detectable at the driver controller as valid.

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