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Device and method of switch converter

A technology of switching converters and capacitors, used in output power conversion devices, conversion of DC power input to DC power output, instruments, etc., can solve problems such as transient response speed limitation, switching frequency changes, etc. Response speed and stable switching frequency

Active Publication Date: 2014-02-12
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the DC-DC synchronous step-down converter circuit with constant on-time (COT) control circuit, the output voltage harmonics have been improved, but the switching frequency will still change due to changes in peripheral components and working conditions, and the harsh Transient response speed will be limited in case of

Method used

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  • Device and method of switch converter
  • Device and method of switch converter

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Embodiment Construction

[0031] A method and apparatus for a switching converter are disclosed. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one of ordinary skill in the art that these specific details need not be employed to practice the present invention. In other instances, well-known materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0032] Throughout this specification, reference to "one embodiment," "an embodiment," "an example," or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in the present invention. In at least one embodiment. Thus, appearances of the phrases "in one embodiment," "in an embodiment," "an example," or "example" in various places throughout this specification are not necessarily all referring to the sa...

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Abstract

A voltage regulator with adaptive hysteretic control. The voltage regulator may include a top switch (e.g., MOSFET) configured to couple a power supply supplying an input voltage to a load. An adaptive hysteretic control circuit of the voltage regulator may turn on the top switch when the feedback voltage reaches the low threshold and turn off the top switch when the feedback voltage reaches the high threshold. The adaptive hysteretic control circuit may adjust the upper and lower threshold to make the voltage regulator working like a constant on time control circuit in steady state. When a step down transient happens, the top switch could be turned off when the output voltage reaches the upper threshold, and when a step up transient happens, the top switch could be turned on when the output voltage reaches the lower threshold, it makes the voltage regulator working like a hysteretic control circuit.

Description

technical field [0001] This invention relates generally to power supplies and, more particularly, to switching converters. Background technique [0002] Most electronic products, such as notebook computers, desktop computers, PDAs, etc., require a direct current (DC) power supply to provide regulated power to various functional modules. The DC-DC synchronous step-down converter has the advantages of high efficiency and small size, and has been widely used. Low voltage ripple and fast transient response are the most basic requirements for DC-DC synchronous buck converters. [0003] The hysteresis control circuit has the advantages of fast transient response and simple structure, and can be used as a control circuit for DC-DC synchronous step-down converters, such as figure 1 As shown, the input voltage is modulated by transistors 101 and 102, coupled to the output filter composed of inductor 103 and capacitor 104, the filtered voltage is output to load resistor 105, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
CPCY02B70/1466H02M3/1588H02M2001/0025Y02B70/10H02M1/0025
Inventor 欧阳茜任远程
Owner CHENGDU MONOLITHIC POWER SYST
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