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

A technology of input power supply and charger, applied in charging/discharging current/voltage regulation, conversion of DC power input to DC power output, collectors, etc., can solve problems such as increasing costs

Active Publication Date: 2014-11-26
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • 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
  • Adaptive input power charger and method for controlling input current of charger
  • 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

Disclosed herein are circuits and methods for limiting a charger input current. In one embodiment, a self-adaptive input power charger for charging a battery, can include: (i) a power stage circuit configured to receive an external input power supply that supplies an input voltage and an input current to the charger; (ii) a comparison circuit configured to generate a comparison result indicating that the input power supply has entered a current-limiting state when the input voltage is less than a first reference voltage; (iii) a current regulation circuit configured to generate a first control signal in response to the comparison result; and (iv) a driving control circuit configured to limit the input current by the first control signal.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00H02M3/157
CPCH02J7/007H02J7/00711H02J7/00718H02J7/007184
Inventor 姚杰陈伟赵晨程帅
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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