Channel Switch Impedance Adjustable Power Circuit and Electronic Device

A technology of power supply circuit and channel switch, applied in circuits, electronic switches, electrical components, etc., can solve the problems of single control method, difficult to meet various circuit requirements, heat loss and other problems

Active Publication Date: 2020-12-11
SHANGHAI YAOHUO MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a power supply circuit and electronic equipment with adjustable channel switch impedance to solve the problems of heat loss, single control means, and difficulty in meeting various circuit requirements

Method used

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  • Channel Switch Impedance Adjustable Power Circuit and Electronic Device
  • Channel Switch Impedance Adjustable Power Circuit and Electronic Device
  • Channel Switch Impedance Adjustable Power Circuit and Electronic Device

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Embodiment Construction

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0074] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a particular order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated ...

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Abstract

The invention provides a power supply circuit with an adjustable channel switch impedance and electronic equipment. The power supply circuit comprises N main channel MOS tubes, a control module, an execution module and a detection module. The execution module comprises a first MOS tube; the detection module comprises a detection resistor and a second MOS transistor; a gate-source voltage of a mainchannel MOS transistor and the gate-source voltage of the first MOS transistor are configured to be consistent, and a source-drain voltage of the main channel MOS transistor and the source-drain voltage of the second MOS transistor are consistent; the control module is connected with a detection resistor and is used for detecting voltage drop information at two ends of the detection resistor; thevoltage drop information can represent a current of a load; and the current between a source and a drain of the first MOS transistor is adjusted according to the voltage drop information so as to adjust the source-drain voltage of the first MOS transistor so that the gate-source voltage of the main channel MOS transistor is correspondingly changed, and the impedance formed by the N main channel MOS transistors is adjusted accordingly.

Description

technical field [0001] The invention relates to a power supply circuit, in particular to a power supply circuit and electronic equipment with adjustable channel switch impedance. Background technique [0002] In the power circuit of electronic equipment, the adjustment of the main current channel can be realized by controlling the on-off control of the switching device in the main current channel. The power supply circuit can be applied to the power output side or the power input side of the electronic equipment. [0003] In the existing related technology, the current-sensing resistor and the MOS transistor used to control the on-off of the main current channel can be connected in series in the main current channel, and then the current of the main current channel can be determined based on the voltage of the current-sensing resistor. However, considering This solution will increase the heat loss of the main current channel. When the current is small, it is difficult to ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/088H03K17/0814H03K17/687
CPCH02M1/088H03K17/08142H03K17/6871
Inventor 黄雷
Owner SHANGHAI YAOHUO MICROELECTRONICS CO LTD
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