Light load current detection system

A technology of current detection and voltage detection, which is applied in the direction of measuring current/voltage, measuring devices, measuring electrical variables, etc., can solve the problems of high manufacturing cost, high area, wasted conversion efficiency, etc., and achieve the effect of high manufacturing cost

Active Publication Date: 2014-12-03
ADVANCED ANALOG TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the existing light-load current detection application circuits, there are generally problems of high manufacturing cost, high area waste and low conversion efficiency

Method used

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Embodiment Construction

[0037] In the light-load current detection system provided by the present invention, there are too many combination implementations, so it is not repeated here, and only two preferred embodiments are listed for specific description.

[0038] Please also refer to figure 1 and figure 2 , figure 1 A schematic block diagram showing a light-load current detection system according to a first preferred embodiment of the present invention, figure 2 A schematic circuit diagram of a light-load current detection system according to a first preferred embodiment of the present invention is shown. As shown in the figure, the light-load current detection system 1 provided by the first preferred embodiment of the present invention is used to detect a current value of a light-load current I of a load 2 in a light-load mode, and the load 2 Electrically connected to a switch 3, wherein the load 2 is at least one of a mobile phone, a tablet, and a notebook computer, but not limited thereto, ...

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Abstract

The invention discloses a light load current detection system, which is used for detecting the current value of the load in a light load mode. The light load current detection system comprises a detection processing module and a control circuit, wherein the detection processing module comprises a power energy saving unit and a voltage detection module, the power energy saving unit is used for transmitting a power energy saving signal, one cycle of the power energy saving signal is corresponding to one switching deadline, or corresponding to a switching state of the power switch; the voltage detection module is used for detecting an input voltage value inputted to a voltage source and generating and outputting a detection signal; the control circuit is provided with a data comparison table including a corresponding relationship among the cycle, the current value and the input voltage value and is set with a threshold, and thus power energy saving signals and detection signals are received, the current value is obtained according to the data comparison table, whether to reach the threshold is judged, and if the judgment result is positive, the switch is closed in the light load mode.

Description

technical field [0001] The invention relates to a light-load current detection system, in particular to a light-load current detection system for judging whether the current value of the light-load current reaches a threshold according to a data comparison table, and then judging whether to close a switch. Background technique [0002] With the progress and development of the times, in recent years, the requirements for the efficiency of switching power supply devices such as mobile power supplies have gradually changed from focusing on the efficiency of full load and heavy load to equal emphasis on full load, light load and efficiency. Generally, when a user uses a power adapter to charge a mobile phone, after the battery is fully charged, the screen of the mobile phone will display that the mobile phone has been charged. inconvenient. [0003] In the application of mobile power supply, the light load current detection can make users have better convenience and usability. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
Inventor 徐明裕刘卫宗
Owner ADVANCED ANALOG TECH INC
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