Power conversion efficiency selection circuit, method and mobile power supply

A power conversion efficiency and power conversion technology, which is applied in the direction of improving the efficiency of home appliances, battery circuit devices, electric vehicles, etc., and can solve problems such as the inability to maintain optimal conversion efficiency.

Active Publication Date: 2018-08-07
QINGDAO GOERTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a power conversion efficiency selection circuit, method and mobile power supply, which solves the technical problem that the conversion efficiency of the existing mobile power supply cannot maintain the optimal conversion efficiency as the load changes

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  • Power conversion efficiency selection circuit, method and mobile power supply
  • Power conversion efficiency selection circuit, method and mobile power supply

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Embodiment Construction

[0018] The specific implementation manners of the present application will be described in further detail below in conjunction with the accompanying drawings.

[0019] The power conversion efficiency selection circuit and mobile power supply proposed in this application can provide three optional situations for the feedback resistance of the output voltage of the power conversion chip through the configuration of the output voltage feedback resistance and the control of the MCU, and for each case. The input and output power of the power conversion chip are sampled and detected, and the optimal power conversion efficiency state is selected through calculation, so as to achieve the technical effect of keeping the mobile power supply in the optimal conversion efficiency state.

[0020] Such as figure 1As shown, the power conversion efficiency selection circuit proposed in this application includes power input terminal V_IN, power conversion chip U1, MCU U2, power output terminal ...

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Abstract

The invention discloses a power conversion efficiency selection circuit, a method and a mobile power supply, which solves the technical problem that the conversion efficiency of the mobile power supply cannot maintain the optimal conversion efficiency as the load changes. It includes an input current sampling circuit, a power conversion chip, an MCU, an output current sampling circuit and a feedback resistance adjustment circuit; the input current sampling circuit is connected in parallel to the input resistance, and the output current sampling circuit is connected in parallel to the output resistance; the first part of the input current sampling circuit An enable end and the second enable end of the output current sampling circuit are connected to the second control end of the MCU; the feedback resistance adjustment circuit includes a first feedback resistance adjustment circuit and a second feedback resistance adjustment circuit connected in series; the first feedback resistance adjustment The third enable terminal of the circuit is connected to the third control terminal of the MCU, and the fourth enable terminal of the second feedback resistance adjustment circuit is connected to the fourth control terminal of the MCU. By selecting the optimal power conversion efficiency, the power supply can be kept working under the working configuration of the optimal power conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of power supply circuits, and in particular relates to a power conversion efficiency selection circuit, a method and a mobile power supply. Background technique [0002] Mobile power, also called power bank, rechargeable battery, etc., is a portable charger that integrates power supply and charging functions. It can charge mobile phones, tablet computers and other digital devices anytime and anywhere, bringing convenience to users' lives. [0003] The conversion efficiency of mobile power supply has always been the focus of business promotion. The power conversion efficiency refers to the ratio of the output power to the input power of the power supply. It is generally believed that the higher the power conversion efficiency, the greater the output power, indicating that the output function of the mobile power supply is better. The faster it charges. [0004] However, due to the different loads connected to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00H02J7/00
CPCH02J7/0072H02M1/00H02M1/0003Y02B40/00
Inventor 李卫国
Owner QINGDAO GOERTEK
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