Implementation of high-voltage direct-charging 2:1 switched-capacitor converter for battery charging of electronic devices

A technology of power converters and voltage regulation circuits, applied in the direction of converting DC power input to DC power output, collectors, battery circuit devices, etc.

Pending Publication Date: 2018-12-07
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Charging current has traditionally been limited to about 3 amps due to limitations in cables, connectors, and the charge acceptance rate of lithium-ion (Li-ion) batteries in mobile devices

Method used

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  • Implementation of high-voltage direct-charging 2:1 switched-capacitor converter for battery charging of electronic devices
  • Implementation of high-voltage direct-charging 2:1 switched-capacitor converter for battery charging of electronic devices

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Embodiment Construction

[0025] It should be understood that the drawings are only schematic and not drawn to scale. It should also be understood that the same reference numbers are used throughout the drawings to indicate the same or similar parts.

[0026] The description and drawings illustrate the principles of the various exemplary embodiments. It will be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the invention and are included within its spirit and scope. In addition, all the examples cited in this article are mainly intended for teaching purposes to assist the reader to understand the principles of the present invention and the concepts provided by the inventors to deepen the field, and all examples should be considered as not limiting such specific Quote examples and conditions. Additionally, as used herein, the term "or" means a non-exclusive or (ie, and / or) unless ot...

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Abstract

A power converter includes 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 currentlarger than the input current, and a power path controller to control switching and provide feedback within the power converter.

Description

technical field [0001] Various embodiments disclosed herein relate to charging mobile and other electronic devices, including implementation options for a high efficiency 2:1 switched capacitor converter designed for high voltage DC battery charging. Two 8-FET and 9-FET topological approaches are described along with applicable control circuits. Background technique [0002] Fast battery charging of smartphones, other mobile devices, and small electronic devices has become increasingly important over the past few years. Due to the limitations of cables, connectors, and the charge acceptance rate of lithium-ion (Li-ion) batteries in mobile devices, charging current is traditionally limited to about 3 amps. Recent advances in achievable charge acceptance rates allow some mobile device batteries to be charged at much higher currents, eg, between six and ten amps for a three amp-hour battery. A commercially available response to this new battery capability is implemented throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/07H02J7/00
CPCH02M3/07H02J2207/20H02J7/00H02M3/072H02M3/077H02J7/04
Inventor 彼得·克里斯蒂亚安斯罗伯特·克兰II·科斯比
Owner NXP BV
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