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Adaptive input power charger and method for controlling input current of charger

A technology of input power and input current, applied in the direction of converting DC power input to DC power output, current collectors, battery circuit devices, etc., which can solve problems such as increasing costs

Active Publication Date: 2013-02-27
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] b. The input current-limiting reference is set according to the output power of the input power supply. The system where the charger is located must have a corresponding detection circuit to detect the type of the input power supply so as to establish a corresponding input current-limiting reference, which increases costs.

Method used

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  • Adaptive input power charger and method for controlling input current of charger

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Embodiment Construction

[0049] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0050] refer to figure 2 , which shows a schematic diagram of an embodiment of a charger for an adaptive input power supply according to the present invention, the charger includes a power stage circuit and a drive control circuit, such as figure 2 As shown, the power stage circuit in this embodiment is a bidirectional DC conversion ci...

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Abstract

The invention discloses an adaptive input power charger and a method for controlling an input current of a charger. An input voltage of the charger is compared with a first reference voltage through a comparison circuit to generate a comparison result; and when the comparison result represents that current of input power is limited, a current regulation circuit controls the duty ratio of a power switch tube according to the comparison result to limit the input current of the charger so as to remove a current-limiting state of the input power. In addition, when the comparison result represents that the current of the input power is not limited, the current regulation circuit can also increase the current reference value of a current control loop according to the comparison result to increase charging current so as to achieve the purpose of quick charging. The adaptive input power charger can be used for adaptively performing current-limiting protection according to different input voltages, so that the adaptability is good.

Description

technical field [0001] The invention relates to the field of power supplies, more specifically, to a charger for adaptive input power supply and a method for controlling the input current of the charger. Background technique [0002] Switching chargers are small in size, high in efficiency, and can quickly charge batteries, and are widely used in smartphones, tablet computers, and other fields. And the input power that it is charged such as the USB interface of adapter, computer equipment usually has certain output power and output current limitation, when the charging current of charger is too big, described input power will enter current-limiting working state, therefore The input current of the charger needs to be adjusted and limited to ensure the normal operation of the charger. [0003] Such as figure 1 As shown, it is a circuit diagram of a conventional switch-type charger, and its power stage circuit is a bidirectional DC conversion circuit for charging a lithium b...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02M3/157
CPCH02J7/00711H02J7/00718H02J7/007184
Inventor 姚杰陈伟赵晨程帅
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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