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METHOD AND CIRCUIT OF DETECTING ATTACHMENT AND DETACHMENT BETWEEN A PORTABLE DEVICE AND A POWER CONVERTER

  • US 20150311806A1
  • Filed: 04/22/2015
  • Published: 10/29/2015
  • Est. Priority Date: 04/24/2014
  • Status: Active Grant
First Claim
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1. A circuit for detecting attachment and detachment between a portable device (PD) and a power converter, comprising:

  • a PD attachment detection circuit coupled to at least one connecting terminal of said power converter for confirming attachment of said portable device to said power converter and generating an attachment signal; and

    a PD detachment detection circuit detecting a bus voltage of said power converter according to an enabling signal, said enabling signal being generated when said power converter enters a light-load condition, wherein said PD detachment detection circuit confirms detachment of said portable device from said power converter by detecting a voltage drop of said bus voltage of said power converter.

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