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Driving circuit and power supply chip

A technology of drive circuit and drive module, which is applied in the direction of high-efficiency power electronic conversion, electrical components, and adjustment of electric variables, etc., and can solve the problem of high energy loss of the drive circuit

Active Publication Date: 2022-07-22
SHANGHAI XINLONG SEMICON TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The patent of the present invention provides a driving circuit and a power supply chip to solve the problem of high energy loss of the driving circuit in high-voltage applications in the prior art

Method used

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  • Driving circuit and power supply chip
  • Driving circuit and power supply chip
  • Driving circuit and power supply chip

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Embodiment Construction

[0069] In order to make the objects, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, each drawing needs to show different emphases, and sometimes different scales are used.

[0070]As used herein, the singular forms "a," "an," and "the" include plural referents, the term "or" is generally employed in its sense including "and / or", and the term "a number" It is usually used in the sense including "at least one", the term "at least two" is usually used in the sense including "two or more", in addition, the t...

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Abstract

The invention provides a driving circuit and a power supply chip. Wherein the driving circuit comprises an upper tube driving module and a lower tube driving module, and a power supply negative electrode of the upper tube driving module is connected with a power supply positive electrode of the lower tube driving module. According to the configuration, different electrical characteristics of the PMOS power tube and the NMOS power tube are reasonably utilized, an intermediate level is introduced, the intermediate level is a reference ground of the upper tube driving module and a power supply of the lower tube driving module, two paths of driving currents in a traditional driving mode are ingeniously changed into one path of current, and the problem that the current is too high when high voltage is input is effectively solved. And influence of driving current on the overall efficiency of the system.

Description

technical field [0001] The present invention relates to the technical field of power chips, in particular to a driving circuit and a power chip. Background technique [0002] The BUCK type switching power supply control system generally needs two power tubes, one is the power output tube (in the following, called the upper tube), you can choose to use the PMOS power tube and the NMOS power tube, and the other is the freewheeling tube (in the following text) , called down tube), using NMOS power tube. The switching power supply chip needs to design the corresponding drive circuit and power supply circuit for the two power tubes. Generally, the power supply circuit of the drive circuit is powered by the input voltage, and is stepped down by the internal linear step-down module to a suitable drive voltage and then used for the power tube switch, that is, the overall path of the charge and discharge current at the GATE end of the power tube flows from the input voltage into GND...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088H02M3/158
CPCH02M1/088H02M3/1588Y02B70/10
Inventor 李瑞平刘彬王建虎
Owner SHANGHAI XINLONG SEMICON TECH CO LTD
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