Multi-phase switch converter and control circuit and control method thereof

A switching circuit and control circuit technology, applied in the direction of converting DC power input to DC power output, electrical components, output power conversion devices, etc., can solve the problems of uncontrollable output voltage overshoot and reduce output voltage overshoot , improve the transient response speed, and achieve the effect of current sharing in each phase

Active Publication Date: 2014-06-04
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the switching converter with constant on-time control, the overshoot of the output voltage when the load current drops instantaneously is uncontrollable

Method used

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  • Multi-phase switch converter and control circuit and control method thereof
  • Multi-phase switch converter and control circuit and control method thereof
  • Multi-phase switch converter and control circuit and control method thereof

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Embodiment Construction

[0022] Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described here are only for illustration, not for limiting the present invention. 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 circuits, materials or methods have not been described in detail in order to avoid obscuring the present invention.

[0023] 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 on...

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Abstract

The invention discloses a multi-phase switch converter and a control circuit and control method of the multi-phase switch converter. The multi-phase switch converter comprises a plurality of switching circuits, and the output ends of the switching circuits are coupled together for providing output voltages. The control circuit comprises an input end and a plurality of output ends, the input end is coupled to the output ends of the switching circuits to receive the output voltages, the output ends provide a plurality of switch control signals to control the switching circuits to be powered on in sequence, when overshoot is detected to happen to the output voltages, the current switch switches are powered off temporarily through the control circuit, and when the output voltages are restored to be normal, the current switch switches continue to be powered on by the control circuit so that the total powered-on duration of the current switching circuits can be equal to a preset powered-on duration.

Description

technical field [0001] Embodiments of the present invention relate to electronic circuits, and in particular to multi-phase switching converters and their control circuits and control methods. Background technique [0002] In recent years, with the emergence of some high-performance CPUs, switching converters with lower output voltage and higher output current are required, and the requirements for thermal performance, EMI and load transient response of switching converters are also increasing. With its superior performance, multi-phase switching converters are widely used in solutions for high-performance CPU power supplies. The multi-phase switching converter includes multiple switching circuits, the output terminals of the multiple switching circuits are coupled together to provide energy for the load. Among the control methods of switching converters, constant on-time control has been widely used due to its superior load transient response, simple internal structure and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/088
CPCH02M1/32H02M3/1584H02M3/1586
Inventor 姜礼节吴小康罗苏华欧阳茜周景海
Owner CHENGDU MONOLITHIC POWER SYST
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