Power supply device, switching power supply conversion circuit and control method thereof
A conversion circuit and switching circuit technology, applied in control/regulation systems, output power conversion devices, electrical components, etc., can solve the problem of large influence, difficult control loops to cope with diverse needs, increase control system complexity and chip cost. and other issues, to achieve the effect of being conducive to stability, reducing complexity, and reducing chip cost
Active Publication Date: 2022-02-18
CELLWISE MICROELECTRONICS CO LTD DONGGUAN
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- Description
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- Application Information
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Problems solved by technology
However, due to different loads and usage environments, it is difficult for a single control loop to meet diverse needs
Especially at low load, the switching ripple has a greater impact on the output, and using multiple control loops to control greatly increases the complexity of the control system and the cost of the chip
Method used
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[0021] In order to make the above purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only some structures related to the present application are shown in the drawings but not all structures. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0022] The terms "first", "second", etc. in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "include" a...
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The application relates to the field of switching power supply circuits, and discloses a power supply device, a switching power supply conversion circuit and a control method. The switching power conversion circuit includes a switching circuit, a filter circuit and a bandwidth-adjustable error circuit. The first end of the switch circuit is connected to the power supply; the first end of the filter circuit is connected to the third end of the switch circuit, and the second end is connected to the load; the first end of the bandwidth adjustable error circuit is connected to the second end of the filter circuit, and the second end is connected to the second end of the switch circuit terminal; the bandwidth adjustable error circuit receives the current output voltage, and obtains the switching frequency based on the current output voltage, and the switching frequency is used to control the operation of the switching circuit; the bandwidth adjustable error circuit obtains the current switching frequency, and adjusts the switching circuit bandwidth according to the current switching frequency. The bandwidth is less than the current switching frequency. When the output is small, the switching ripple on the output voltage will not be amplified, which is beneficial to the stability of the system. The power control from high output to low output is realized with one circuit, which reduces the complexity of the system and the cost of the chip.
Description
technical field [0001] The present application relates to the technical field of switching power supplies, in particular to a power supply device, a switching power supply conversion circuit and a control method thereof. Background technique [0002] With the development of science and technology, people have higher and higher requirements for electronic products such as mobile phones and tablets. Various electronic products currently on the market also have high requirements on the power supply system. Not only fast response speed is required, but also higher and higher requirements for stability, conversion efficiency and cost. Among them, the switching power supply conversion circuit plays an indispensable role. The switching power supply conversion circuit is generally designed with a control loop to ensure the stability of the output. However, due to differences in loads and usage environments, it is difficult for a single control loop to meet diverse needs. Especia...
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IPC IPC(8): H02M3/156H02M3/158H02M1/14H02M1/44
CPCH02M3/156H02M3/158H02M1/14H02M1/44
Inventor 黄东栩朱炜礼
Owner CELLWISE MICROELECTRONICS CO LTD DONGGUAN