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Combination of high-side and low-side current control in system for providing power over communication link

  • US 7,702,302 B1
  • Filed: 08/21/2006
  • Issued: 04/20/2010
  • Est. Priority Date: 12/12/2005
  • Status: Active Grant
First Claim
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1. A system for supplying power over a communication link, comprising:

  • a power supply device for delivering power to an output port coupled to the communication link,a low-side power supply line provided between the output port and a more negative power supply lead of a pair of leads for supplying power to the power supply device,a high-side power supply line provided between the output port and a more positive power supply lead of the pair of leads,low-side current control circuitry coupled to the low-side power supply line for controlling low-side current in the low-side power supply line when the low-side current exceeds a first prescribed value, andhigh-side current control circuitry coupled to the high-side power supply line for controlling high-side current in the high-side power supply line when the high-side current exceeds a second prescribed value.

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