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Switching power supply circuit and method

A switching power supply circuit and circuit technology, applied in electrical components, regulating electrical variables, instruments, etc., can solve the problem of less application of SR, and achieve the effect of power output

Pending Publication Date: 2022-03-01
CHENGDU MONOLITHIC POWER SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, SR is rarely used in multi-output, how to better control the balance of each output in multi-output SR applications is a technical problem that needs to be solved in this field

Method used

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  • Switching power supply circuit and method
  • Switching power supply circuit and method

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Embodiment Construction

[0017] 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.

[0018] 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 switching power supply circuit and method. The switching power supply circuit includes: a primary circuit receiving an input voltage, the primary circuit having a main power switch coupled to a primary winding; a first secondary circuit providing a first output voltage, the first secondary circuit having a first slave power switch coupled to a first secondary winding; a second secondary circuit providing a second output voltage, the second secondary circuit having a second slave power switch coupled to a second secondary winding; the control circuit determines whether the first output voltage and the second output voltage deviate from the reference voltage. According to the switching power supply circuit and the switching power supply method, balance of power output of different paths is realized.

Description

technical field [0001] The present invention relates to an electronic circuit, and more particularly, the present invention relates to a switching power supply circuit and a method thereof. Background technique [0002] In home appliance applications, there are usually two or more outputs to supply power to different loads. For example, in the range hood application, the load may include motor fan, timer, lighting lamp, etc. With the development trend of home appliances becoming more complex in recent years, the power supply requirements have increased significantly, so more requirements have been placed on efficiency. [0003] Synchronous rectification technology (sVnchronous rectification, SR) has significant advantages in efficiency control. The so-called SR means that in the power stage circuit, a controllable power tube (such as a metal oxide field effect transistor MOSFET) is used to replace the diode as the slave switch tube of the power stage circuit, and cooperate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33561H02M3/33592H02M1/0029
Inventor 王斯然
Owner CHENGDU MONOLITHIC POWER SYST
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