• Patent Title: Precharge in a switched capacitor (SC) converter
  • Application No.: US17303699
    Application Date: 2021-06-04
  • Publication No.: US11545895B2
    Publication Date: 2023-01-03
  • Inventor: Bin ShaoSri Harsh Pakala
  • Applicant: NXP B.V.
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Main IPC: H02M3/07
  • IPC: H02M3/07 H02J7/00
Precharge in a switched capacitor (SC) converter
Abstract:
A switched capacitor (SC) power stage includes a first stage circuit with a set of switches coupled in series, a first flying capacitor coupled to a first node between a first and second switch and to a second node between a fifth and sixth switch, a second flying capacitor coupled to a third node between the second and a third switch and to a fourth node between a seventh and eighth switch, and a third flying capacitor coupled to a fifth node between a third and fourth switch and a second terminal coupled to the second node. A control circuit establishes a first configuration of the switches to precharge the first, second, and third flying capacitors to a first voltage, and a second configuration of the switches to precharge the first and second flying capacitors to a second voltage while the third flying capacitor remains charged at the first voltage.
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