Device and method based on constant on-time pulse width control

A technology of pulse width control and constant on-time, which is applied in the direction of output power conversion devices, measurement devices, control/regulation systems, etc., and can solve problems such as inflexibility

Active Publication Date: 2019-04-12
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, setting the on-time pulse width with the fixed value is inflexible since the events of the transients are not always the same

Method used

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  • Device and method based on constant on-time pulse width control
  • Device and method based on constant on-time pulse width control
  • Device and method based on constant on-time pulse width control

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Embodiment Construction

[0021] The following descriptions are preferred embodiments for implementing the present invention. The following examples are only used to illustrate the technical characteristics of the present invention, and are not intended to limit the scope of the present invention. Certain terms are used throughout the specification and claims to refer to particular elements. It should be understood by those skilled in the art that manufacturers may use different terms to refer to the same element. The specification and claims do not use the difference in name as the way to distinguish components, but the difference in function of the components as the basis for the difference. The terms "element", "system" and "apparatus" used in the present invention may be a computer-related entity, where the computer may be hardware, software, or a combination of hardware and software. The terms "comprising" and "including" mentioned in the following description and claims are open terms, so they ...

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Abstract

The present invention provides a device based on constant on-time pulse width control capable of detecting transient events of a voltage converter, including a comparator, a logic circuit and a controller. The comparator generates a logic control signal to the logic circuit according to the two synthesized signals of the controller. The logic circuit generates a pulse control signal with an on-time pulse width to charge the output capacitor of the output stage circuit of the voltage converter according to the logic control signal. The controller is coupled to generate the two composite signals to the comparator by generating a slope voltage signal and amplifying the output voltage ripple signal based on the reference voltage, and for detecting transient events and dynamically adjusts the on-time pulse width of the pulse control signal. The invention also provides a related method. By adopting the present invention, the transient event can be detected, and the conduction time pulse width can be adaptively adjusted when the transient event is detected.

Description

technical field [0001] The present invention relates to a voltage converter solution, more particularly, to a device and method based on constant on-time pulse width control used in a voltage converter, and has a fast transient State responsiveness and the flexibility of adaptively adjusting the on-time pulse width in response to the occurrence of transient events. Background technique [0002] Generally speaking, conventional constant on-time controllers are often limited by the small equivalent series resistor (ESR) of their output capacitors. Because the ESR is too small, conventional controllers cannot effectively reflect / detect the ripple of the output voltage and are difficult to detect or respond to the occurrence of transient events. To improve this problem, some traditional schemes have been proposed. However, some of these conventional solutions are still unable to effectively detect or respond to the occurrence of transient events. Furthermore, another part of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/158
CPCH02M3/158H02M3/156H02M1/0025H02M3/1566G01R19/16585H02M1/0045H02M1/0067
Inventor 黄华强
Owner MEDIATEK INC
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