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A Method of Realizing Output Current Detection Using Mosfet Tube Internal Resistance

A technology of output current detection and internal resistance, which is applied in the direction of measurement using digital measurement technology, can solve the problems of not getting better use of energy transmission, affecting the normal use of products, reducing user experience, etc., to reduce heat dissipation The use of materials, the improvement of market competitiveness, and the effect of output voltage stability

Active Publication Date: 2019-07-19
东莞泰克威科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But because of this design method, the data is collected through the voltage drop of the sampling resistor, which will consume part of the output power and generate heat, which will not only make the energy transmission not better utilized, but also generate too much heat It will directly affect the normal use of the product and greatly reduce the user experience

Method used

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  • A Method of Realizing Output Current Detection Using Mosfet Tube Internal Resistance
  • A Method of Realizing Output Current Detection Using Mosfet Tube Internal Resistance
  • A Method of Realizing Output Current Detection Using Mosfet Tube Internal Resistance

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Embodiment 1

[0024] Such as figure 1 As shown, in Embodiment 1, a method for realizing output current detection by using MOSFET tube internal resistance includes:

[0025] Built-in circuit connection structure of mobile power supply, the circuit connection structure includes MCU processor, battery, boost IC, NTC thermistor, MOSFET tube and output interface, the battery is connected with the MCU processor, boost IC Sexual connection, the MCU processor is electrically connected with the boost IC, NTC thermistor and MOSFET tube respectively, and the output interface is electrically connected with the boost IC and MOSFET tube;

[0026] And an output current detection scheme based on the circuit connection structure, including the following steps:

[0027] (A1) At the beginning of the external output current supply of the mobile power supply, the battery terminal provides power to the MCU processor, and the MCU processor simultaneously provides a driving voltage to the boost IC and makes the M...

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Abstract

The invention discloses a method for detecting output current by using the MOSFET tube internal resistance. The internal resistance of an MOSFET tube is used for detecting the output current; by the corresponding environment actual simulation experiment, a batch of MOSFET experiment data is obtained at random; According to the single chip microcomputer intelligence algorithm and the combination of the peripheral circuit design, intelligent dynamic compensation is conducted on the collected experiment data by automatically detecting corresponding environment change so as to ensure that the accuracy of a current detection value can meet the product specification requirement.

Description

technical field [0001] The invention relates to the technical field of circuit testing, in particular to a method for realizing output current detection by utilizing the internal resistance of a MOSFET tube. Background technique [0002] At present, with the popularization of mobile consumer electronic products, the development of the mobile power industry has also been rapidly improved, and the use of mobile power has gradually become an indispensable part of life. It has been continuously optimized to make it more in line with the actual needs of users. [0003] In the past circuit design, the design of the sampling resistor is often used to monitor the current. This design method can feed back the voltage drop generated by the resistor to the MCU (control chip), and accurately obtain the current data, so as to pass the MCU. Parameter setting, setting related output over-current protection parameters, cut-off shutdown current and other parameters, so that the mobile power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 王诗太袁嘉辉莫沃伦刘文俊
Owner 东莞泰克威科技有限公司
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