DC/DC power supply conversion system

A conversion system, DC power supply technology, applied in control/regulation systems, high-efficiency power electronic conversion, output power conversion devices, etc., can solve problems such as large PCB area, and achieve the effect of small PCB area and high conversion efficiency

Active Publication Date: 2020-06-19
HALO MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This charging architecture requires two DC / DC converters and a Buck-Boost switching power supply charger, resulting in many external components and a large PCB area

Method used

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  • DC/DC power supply conversion system
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Examples

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Embodiment Construction

[0019] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] A DC / DC power conversion system of this embodiment, as attached image 3 The single-stage conversion system 400 of the input source selection function is shown. The single-stage conversion system 400 includes a first power switch and a second power switch, two sets of resonant components, a first output filter inductor, a second output filter inductor, and a second output filter inductor. Five power switch, main controller and input source selection module 440. The ...

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Abstract

The invention discloses a DC / DC power conversion system which comprises a first power switch and a second power switch. The first power switch comprises at least four power switches which are connected in series; the second power switch comprises at least four power switches which are connected in series; the first power switch and the third power switch of the second power switch are controlled by a first duty ratio, and the second power switch and the fourth power switch of the second power switch are controlled by a second duty ratio. The system further comprises two groups of resonance components which respectively act on the first power switch and the second power switch, a first output filter inductor and a second output filter inductor which are respectively used for averaging switching voltage from the first power switch and the second power switch, and a fifth power switch which acts on one group of resonance components. The DC / DC power conversion system has the advantages ofhigher conversion efficiency, less external components and smaller PCB area.

Description

technical field [0001] The invention relates to the technical field of DC-DC power conversion, and relates to a battery charging system based on a DC / DC converter based on a charge pump. Background technique [0002] Modern smartphones typically require two sources of power to charge their batteries: wireless power and USB power. In order to charge the battery efficiently and cost-effectively, the voltage of the input power source can be as high as 20V (such as a USB PD-based adapter or wireless charging). However, the maximum voltage of a single battery cell is less than 5V, and to minimize power loss during battery charging, efficient DC / DC conversion is required to reduce the voltage of USB and wireless power to 5V or lower. Charge-pump-based DC / DC converter technology can achieve this voltage conversion with up to 98% efficiency in buck 2:1 or boost 1:2, whereas for a single-cell battery powered system, two A charge-pump based converter cascade (4:2 then 2:1) converts ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02J7/00
CPCH02M3/1582Y02B70/10
Inventor 范俊陶海赵亮
Owner HALO MICROELECTRONICS CO LTD
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