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Drive circuit and power supply system

A driving circuit and driving current technology, applied in the direction of logic circuit connection/interface layout, logic circuit coupling/interface using field effect transistors, etc., can solve the problem that the driving current is difficult to adapt to different power sources or loads, and achieve low loss , high reliability and low cost

Active Publication Date: 2021-10-08
SHANGHAI XINLONG SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a drive circuit and power supply system to solve the problem in the prior art that the drive current is difficult to adapt to different power sources or loads when the NPN power tube is used as a power switch

Method used

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  • Drive circuit and power supply system
  • Drive circuit and power supply system

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Embodiment Construction

[0054] In order to make the purpose, advantages and features of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and not drawn to scale, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structures. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

[0055] As used in the present invention, the singular forms "a", "an" and "the" include plural objects, the term "or" is usually used in the sense of including "and / or", and the term "several" Usually, the term "at least one" is used in the meaning of "at least one", and the term "at least two" is usually used in the meaning of "two or more". In ...

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Abstract

The invention provides a drive circuit and a power supply system. Among them, the main module of the driving circuit can adaptively adjust the driving current of the power switch according to the current change of the output terminal, and correspondingly set up other components to solve the detailed problems that need to be dealt with in the whole solution, and obtain the The beneficial effect of adjusting the drive current of the NPN power switch when the size is small solves the problem in the prior art that the drive current is difficult to adapt to different power sources or loads when the NPN power tube is used as a power switch. At the same time, compared with the solution based on MOS transistors as power switches, it also has the advantages of fast response, low loss, high reliability and low cost.

Description

technical field [0001] The invention relates to the technical field of power chips, in particular to a driving circuit and a power supply system. Background technique [0002] The power tube in the conventional power supply often uses a MOS power tube. Since the MOS tube is a voltage-controlled device, it only needs a large driving current when the power tube is turned on and off. Compared with the NPN type power tube, it has better power consumption control. . However, the process of MOS power tubes is complex and the cost is high, and under the same process production cost, the reliability of MOS power tubes is much lower than that of NPN power tubes, so in some application scenarios with harsh application environments, MOS power tubes are not doesn't work well. [0003] On the other hand, when the MOS power tube is turned on, the current flowing through itself is only affected by the characteristics of the power supply and the load; but when the NPN power tube is turned...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0185
CPCH03K19/0185
Inventor 王建虎李瑞平池伟刘彬
Owner SHANGHAI XINLONG SEMICON TECH CO LTD