Drive circuit and related products

A driving circuit and driving current technology, which is applied in the electronic field, can solve problems such as poor effect, and achieve the effect of smooth rise of driving voltage, reduction of variation, and improvement of EMI effect

Active Publication Date: 2022-02-18
SHENZHEN INJOINIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The driving control in the prior art is often driven by a large current at the beginning, resulting in a large di / dt, and then the electromagnetic interference (electromagnetic interference, EMI) effect is poor. Therefore, how to reduce the EMI in the driving process problem to be solved

Method used

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  • Drive circuit and related products
  • Drive circuit and related products
  • Drive circuit and related products

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Embodiment Construction

[0021] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only the present invention. Some, but not all, embodiments of the application. Based on the description of the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the protection scope of the present application.

[0022] The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive i...

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Abstract

The present application provides a drive circuit and related products, the drive circuit includes: a first segment drive circuit and a second segment drive circuit, wherein the first segment drive circuit is connected to the second segment drive circuit; The second section of the driving circuit is used to drive the external power transistor to realize the driving function; the driving current of the second section of the driving circuit is E times of the driving current of the first section, and the said E is greater than 1. Adopting the embodiment of the present application, since the first section of the driving circuit is driven by a small current, and the second section of the driving circuit is driven by a large current, the change of di / dt can be reduced, the driving voltage of the power tube can be increased smoothly, and the EMI effect of the chip can be improved.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to a driving circuit and related products. Background technique [0002] Due to the dv / dt and di / dt changes in the switching process of the switching power supply, it is difficult to eliminate the electromagnetic interference noise of the switching power supply generated by the parasitic inductance and capacitance in the circuit. There are mainly the following noise sources: power MOS, output diode, inductor and transformers. Currently popular PD (power delivery) fast charging requires a wider output voltage range. Therefore, the chip design requires that the chip input operating voltage has a wider operating range, and the wider input voltage range poses challenges for the design of the driving circuit. [0003] The driving control in the prior art is often driven by a large current at the beginning, resulting in a large di / dt, and then the electromagnetic interfere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H02M1/44H02M3/158
CPCH02M1/08H02M1/44H02M3/158Y02B70/10
Inventor 张涛
Owner SHENZHEN INJOINIC TECH
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