Switch power supply circuit and control method thereof

A switching power supply circuit and controller technology, applied in control/regulation systems, emergency protection circuit devices, electrical components, etc., can solve the problems of high power consumption of LDO circuits, affect system efficiency, increase system burden, etc., and reduce circuit power. consumption and improve system efficiency

Active Publication Date: 2013-04-24
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, when the high-voltage signal is released, the power consumption of the LDO circuit is relatively large, which increases the burden on the system and seriously affects the efficiency of the system.

Method used

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  • Switch power supply circuit and control method thereof
  • Switch power supply circuit and control method thereof
  • Switch power supply circuit and control method thereof

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Embodiment Construction

[0021] 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.

[0022] 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 application discloses a switch power supply circuit and a control method thereof. The switch power supply circuit includes an input port which receives the input signal; an energy storage port which provides the energy storage voltage; an inductor which is provided with a first terminal and a second terminal, wherein the first terminal is coupled to the input port; a power level circuit which is coupled between the second terminal of the inductor and the energy storage port; an energy storage capacitor which is coupled between the energy storage port and the reference ground; a boost controller which receives the feedforward signal which represents the input signal, and outputs the boost control signal to maintain the boost working mode of the power level circuit when the input signal is bigger than a boost threshold; and a buck controller receives the feedforward signal which represents the input signal, and outputs the buck control signal to maintain the buck working mode of the power level circuit when the input signal is smaller than a buck threshold, and the energy storage voltage is bigger than the input signal. The switch power supply circuit and the control method thereof reduce the circuit consumption and improve the system efficiency.

Description

technical field [0001] The present invention relates to an electronic circuit, more specifically, the present invention relates to a switching power supply circuit and a control method thereof. Background technique [0002] In typical digital subscriber line applications, asymmetric digital subscriber loop, and solid-state hard drive applications. In order to supply power to the system when the system is powered off, multiple energy storage capacitors are often coupled together in parallel. But this will increase the system cost. [0003] Storing energy at high voltage and releasing it when power is lost reduces the number of storage capacitors. The existing technology uses a combination of charge pump and LDO (low dropout) circuit to manage energy. The charge pump converts the input signal of the system into a high-voltage signal, and the LDO is responsible for releasing the high-voltage signal when the system is powered off to maintain the system. Work. However, the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/10H02M3/155H02H7/10
CPCH02M3/1582H02H7/10H02M2001/0022H02M1/0022
Inventor 赖鹏捷周景海杨先庆
Owner CHENGDU MONOLITHIC POWER SYST
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