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An Adaptive Constant On-time Controller for Non-ideal Effect Suppression

A constant on-time, non-ideal technology, applied in the field of microelectronics, can solve the problems that the switching frequency of the circuit cannot be approximately stable, the duty ratio is not proportional, and the conversion efficiency of the DC-DC converter is reduced, so as to improve the overall conversion efficiency, The effect of approximately stable switching frequency

Active Publication Date: 2020-11-10
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the parasitic on-resistance exists, the on-time of the DC-DC converter is not proportional to the ideal duty cycle with different load currents and different power tube on-resistances, so that the switching frequency of the circuit cannot be approximately stable, reducing the DC - Conversion efficiency of DC converter
[0003] The traditional constant on-time controller does not consider the parasitic on-resistance of the PMOS tube and the NMOS tube when they are on, so that the circuit on-time is not proportional to the ideal duty cycle, resulting in the DC-DC converter reduced efficiency

Method used

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  • An Adaptive Constant On-time Controller for Non-ideal Effect Suppression
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  • An Adaptive Constant On-time Controller for Non-ideal Effect Suppression

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Embodiment Construction

[0042] In order to further explain the technical means and effects adopted by the present invention to achieve the intended purpose of the invention, a self-adaptive constant on-time controller for suppressing non-ideal effects proposed according to the present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. illustrate.

[0043] The aforementioned and other technical contents, features and effects of the present invention can be clearly presented in the following detailed description of specific implementations with accompanying drawings. Through the description of specific embodiments, the technical means and effects of the present invention to achieve the intended purpose can be understood more deeply and specifically, but the accompanying drawings are only for reference and description, and are not used to explain the technical aspects of the present invention. program is limited.

[0044] The n...

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Abstract

The invention relates to an adaptive constant on-time controller for suppressing non-ideal effects, which is applied to a DC-DC converter, and includes a connected sampling module and a constant on-time generation module, wherein the sampling module is used for DC-DC The output voltage of the converter and the non-ideal effect voltage are sampled to obtain a sampled voltage signal; the constant on-time generation module is used to control the on-time of the DC-DC converter according to the sampled voltage signal. The non-ideal effect-suppressed adaptive constant on-time controller of the present invention can adaptively generate constant on-time under different input voltage and load current conditions, so that the switching frequency of the DC-DC converter controlled by it is approximately stable .

Description

technical field [0001] The invention belongs to the technical field of microelectronics, and in particular relates to an adaptive constant on-time controller for suppressing non-ideal effects. Background technique [0002] The DC-DC converter is a voltage converter that effectively outputs a fixed voltage after changing the input voltage. Both the PMOS transistor and the NMOS transistor in the DC-DC converter have parasitic on-resistance when they are turned on, which will make the power transistor conduction produces non-ideal effects. When the parasitic on-resistance exists, the on-time of the DC-DC converter is not proportional to the ideal duty cycle with different load currents and different power tube on-resistances, so that the switching frequency of the circuit cannot be approximately stable, reducing the DC - Conversion efficiency of the DC converter. [0003] The traditional constant on-time controller does not consider the parasitic on-resistance of the PMOS tub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/088H02M1/38H02M3/00
CPCH02M1/088H02M1/38H02M3/00H02M1/385
Inventor 刘帘曦孙梦娜陈成黄文斌廖栩锋
Owner XIDIAN UNIV
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