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A drive voltage dynamic adjustment circuit and a drive voltage dynamic adjustment method

A driving voltage and dynamic adjustment technology, which is applied in the direction of high-efficiency power electronic conversion, electrical components, and adjustment of electrical variables, can solve the problems of low conversion efficiency of light and heavy loads, power loss, and high use cost, so as to save use cost and optimize loss , Improve the effect of conversion efficiency

Inactive Publication Date: 2018-12-21
DONGGUAN HUABEL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the driving voltage of each driver IC is fixed, so the switching loss is the same no matter whether it is light load or heavy load. There are low conversion efficiency for light and heavy loads, serious power loss, and high cost of use. question

Method used

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  • A drive voltage dynamic adjustment circuit and a drive voltage dynamic adjustment method
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  • A drive voltage dynamic adjustment circuit and a drive voltage dynamic adjustment method

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Embodiment 1

[0030] figure 2 It is a structural schematic diagram of a driving voltage dynamic adjustment circuit provided by Embodiment 1 of the present invention. Such as figure 2 As shown, the embodiment of the present invention provides a driving voltage dynamic adjustment circuit, which dynamically optimizes loss by detecting the current in the circuit and dynamically adjusting the driving voltage.

[0031] The driving voltage dynamic adjustment circuit includes a step-down circuit module 10, the step-down circuit module includes a PWM controller 11, an input driver 12, a MOS tube 13 and an inductor 14, the PWM controller 11 and the input driver 12 connected, the input driver 12 is respectively connected to the MOS tube 13 and the inductor 14, and also includes a current detection module 20 and a driving voltage module 30, wherein:

[0032] The current detection module 20 is respectively connected to the current input terminal, the current output terminal and the driving voltage m...

Embodiment 2

[0038] see image 3 , is a schematic flowchart of a method for dynamically adjusting a driving voltage provided in Embodiment 2 of the present invention. The method is executed by the driving voltage dynamic adjustment circuit provided by the embodiment of the present invention, and the specific steps are as follows:

[0039] S101. The current detection module samples the driving current flowing to the current input terminal and the current output terminal of the inductor, and converts it into a sampled voltage and outputs it to the driving voltage module.

[0040] Specifically, step S101 further includes:

[0041] (1) The current detection module samples the driving current flowing to the current input end and the current output end of the inductor;

[0042] (2) The current detection module converts the sampled driving current into a sampling voltage, and outputs it to the driving voltage module.

[0043] It should be noted that the current detection module is a high-preci...

Embodiment 3

[0047] Such as Figure 4 As shown, the driving voltage dynamic adjustment method provided by the third embodiment of the present invention is based on the technical solution provided by the second embodiment, and the step S102 "the driving voltage module outputs the corresponding driving voltage according to the received sampling voltage. voltage to the input driver” for further optimization. Explanations of terms that are the same as or corresponding to the above embodiments are not repeated here. Specifically, the following steps may be included:

[0048] The driving voltage module receives the sampling voltage from the current detection module;

[0049] The driving voltage module determines a driving voltage matching the sampling voltage from a preset relationship table according to the sampling voltage;

[0050] The driving voltage module outputs the driving voltage to the input driver.

[0051] Based on the above optimization, such as Figure 4 As shown, a driving vo...

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PUM

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Abstract

A drive voltage dynamic adjustment circuit and a drive voltage dynamic adjustment method are provided, The circuit comprises a step-down circuit module, wherein the step-down circuit module comprisesa PWM controller, an input driver, a MOS transistor and an inductor; the PWM controller is connected with the input driver; the input driver is respectively connected with the MOS transistor and the inductor; the step-down circuit module also comprises a current detection module and a driving voltage module; The current detection module is respectively connected with the current input terminal, the current output terminal and the driving voltage module of the inductor, and is used for sampling the driving current flowing to the current input terminal and the current output terminal of the inductor, and converting the sampling voltage to output to the driving voltage module; the current detection module is connected with the current input terminal, the current output terminal and the driving voltage module of the inductor. The driving voltage module is connected with the input driver, and is used for outputting the corresponding driving voltage to the input driver according to the sampling voltage. The technical proposal provided by the embodiment of the invention can dynamically optimize the loss by detecting the current in the circuit and dynamically adjusting the driving voltage,thereby improving the conversion efficiency of the heavy and light loads and saving the use cost.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power circuits, and in particular, to a dynamic adjustment circuit for driving voltage and a method for dynamically adjusting driving voltage. Background technique [0002] The step-down circuit in the switching circuit is widely used in the electronics industry in various fields. Take a commonly used step-down circuit BUCK circuit (step-down conversion circuit) as an example, the traditional BUCK circuit, such as figure 1 As shown, it is composed of a controller, an input driver, a pair of external MOS tubes, and an inductor. In the BUCK circuit, the MOS tube and inductor on the current flow path are the main heating elements, and a lot of energy will be lost in these elements. The loss of the MOS tube includes switching loss (Psw) and conduction loss (Pcon). Generally speaking, the greater the driving voltage of the MOS tube, the greater the switching loss, but the larger the dr...

Claims

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Application Information

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IPC IPC(8): H02M1/088H02M3/158
CPCH02M1/088H02M3/158H02M1/0054Y02B70/10
Inventor 肖勋玉
Owner DONGGUAN HUABEL ELECTRONICS TECH