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Battery charger with low standby current

  • US 5,854,551 A
  • Filed: 02/26/1997
  • Issued: 12/29/1998
  • Est. Priority Date: 02/26/1997
  • Status: Expired due to Term
First Claim
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1. An apparatus for charging a battery, comprising:

  • a power supply terminal;

    a controllable power control switch coupled to said power supply terminal;

    a charging circuit coupled to said power control switch, said charging circuit having a charging terminal for connection to a terminal of the battery; and

    control means, coupled to said power control switch, for detecting the presence of a battery connected to the charging terminal and for opening said power control switch if no battery is connected to the charging terminal.

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