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Power supply and power supply circuit thereof

A technology of power supply circuit and discharge current, applied in electrical components, regulating electrical variables, output power conversion devices, etc., can solve problems such as large output ripple, and achieve the purpose of solving large output ripple, improving stability and reducing output ripple. Effect

Active Publication Date: 2019-09-06
BYD SEMICON CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a power supply and its power supply circuit, aiming to solve the problem of large output ripple in the existing power supply circuit

Method used

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  • Power supply and power supply circuit thereof
  • Power supply and power supply circuit thereof
  • Power supply and power supply circuit thereof

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] The realization of the present invention is described in detail below in conjunction with specific accompanying drawing:

[0021] figure 1 The module structure of the power supply circuit provided by an embodiment of the present invention is shown. For the convenience of description, only the parts related to this embodiment are shown, and the details are as follows:

[0022] Such as figure 1 As shown, the power supply circuit provided by the embodiment of the present invention is connected to a load (not shown in the figure), which includes a rectifier bridge 10 , a transformer module 20 ...

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Abstract

The invention belongs to the technical field of power supply, and provides a power supply and a power supply circuit thereof. A control chip including an output line voltage compensation module, a sample-and-hold module, a demagnetization time sampling module, an error amplification module and a driving module is used so that the sample-and-hold voltage outputted by the sample-and-hold module canvary with the output voltage of the power supply circuit when the control chip controls the power switching tube in the power supply circuit, then the output of the error amplification module varies with the output voltage of the power supply circuit, the stability of the compensation loop of the control chip is improved, the output ripple of the power supply circuit is reduced and the problem ofhigh output ripple of the existing power supply circuit can be solved.

Description

technical field [0001] The invention belongs to the technical field of power supplies, and in particular relates to a power supply and a power supply circuit thereof. Background technique [0002] As a device that provides power to various electrical equipment, the importance of the power supply is self-evident. At present, the power supply circuit adopted in the prior art is mainly a typical flyback switching power supply application circuit. The flyback switching power supply circuit mainly controls the power switch tube to connect with the primary winding of the transformer through the drive signal output by the control chip, so as to realize the transfer of energy from the primary circuit to the secondary circuit in a specific power switch tube switching cycle, thereby to the When the power supply is supplied by electrical equipment, and the power supply circuit realizes constant voltage, the output voltage of the power supply circuit is controlled mainly by controlling...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/08H02M1/15
CPCH02M1/08H02M1/15H02M3/33523
Inventor 王文情蒋幸福
Owner BYD SEMICON CO LTD
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