Implementation of high-voltage direct-charging 2:1 switched-capacitor converter for battery charging of electronic devices
AssigneeNXP B.V.
InventorsPeter Christiaans, Robert Glenn Crosby, II
Life of this patent
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Abstract
A power converter including a power conditioning circuit to receive input power and set operating voltages of the power converter, a current sensing circuit to determine an input current of the power converter, a voltage regulation circuit to step down a voltage level of the input power, a charge pump circuit to store charge delivered by the voltage regulation circuit and output to a load a current larger than the input current, and a power path controller to control switching and provide feedback within the power converter.
Claims16
A power converter, comprising:
- a power conditioning circuit configured to receive input power and set operating voltages of the power converter;
- wherein the input power includes an input current and an input voltage;
- a current sensing circuit to determine the input current of the power converter;
- a voltage regulation circuit configured to step down the input voltage of the input power;
- a charge pump circuit configured to store charge delivered by the voltage regulation circuit and to output to a load a current larger than the input current;
- a power path controller configured to control switching and provide feedback within the power converter;
- and
- a plurality of back gate transistors to block leakage current from the output current to the input current.
A method of charging a power adapter having a power converter, comprising:
- providing input power to the power converter;
- wherein the input power includes an input current and an input voltage;
- using the input power to provide operating power to a plurality of driver circuits within the power converter;
- controlling a voltage regulation circuit and a charge pump circuit to reduce the input voltage and increase an output current to a load of the power adapter;
- and
- switching a pair of back gate transistors to prevent reverse current from the output current to the input current in the power converter.
Dependencies are inferred from the claim text.