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Non-isolated AC to DC power device

  • US 20150029768A1
  • Filed: 07/25/2014
  • Published: 01/29/2015
  • Est. Priority Date: 07/25/2013
  • Status: Abandoned Application
First Claim
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1. Apparatus comprising:

  • a rectifier circuit;

    an integrating circuit;

    an analog current blocking (ACB) element connected in series between the rectifier circuit and the integrating circuit, wherein the ACB element has two or more operating modes including a low-resistance (LR) mode and a high-resistance (HR) mode, and wherein the HR mode has a resistance sufficient to substantially block current flow through the ACB element;

    wherein the ACB element automatically transitions toward the HR mode when a current through the ACB element (IACB) reaches a limit current Ilimit, and wherein the ACB element automatically transitions toward the LR mode when a voltage across the ACB element (VACB) goes below a reset voltage Vreset;

    wherein the ACB element is configured such that Ilimit and Vreset are controlled by application of a control signal to the ACB element; and

    a feedback control loop configured to hold an output of the integrating circuit constant at a predetermined value by varying the control signal when input AC power is provided to the rectifier circuit.

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