Power supply feedback control system and method

A feedback control system and power supply technology, applied in the control/regulation system, electrical components, regulating electrical variables, etc., can solve the problem of the rapidity of the small jitter of the output voltage of the power supply, etc., to improve the rapidity and accuracy, The effect of simple and effective feedback control

Active Publication Date: 2022-05-13
北京华芯微半导体有限公司
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  • Application Information

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Problems solved by technology

[0008] However, none of these existing technologies can solve the rapidity probl

Method used

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  • Power supply feedback control system and method
  • Power supply feedback control system and method

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Embodiment

[0048] Such as Figure 1-Figure 10 As shown, in the first aspect, the embodiment of the present invention provides a power supply feedback control system, including a sampling circuit 300, an error amplifier 400, a controller 500, a pulse width modulator 600, and a switching converter 700. The signal input of the sampling circuit 300 terminal is connected with the power supply 100 and the load 200, the signal output terminal of the above-mentioned sampling circuit 300 is connected with the signal input terminal of the above-mentioned error amplifier 400, the signal output terminal of the above-mentioned error amplifier 400 is connected with the signal input terminal of the above-mentioned controller 500, and the above-mentioned controller The signal output terminal of 500 is connected to the signal input terminal of the above-mentioned pulse width modulator 600 , and the signal output terminal of the above-mentioned pulse width modulator 600 is connected to the signal input ter...

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Abstract

The invention discloses a power supply feedback control system and method, and relates to the technical field of voltage control. The system comprises a sampling circuit, an error amplifier, a controller, a pulse width modulator and a switching converter, the signal input end of the sampling circuit is connected with a power supply and a load, and the signal output end of the sampling circuit is connected with the signal input end of the error amplifier. The signal output end of the error amplifier is connected with the signal input end of the controller, the signal output end of the controller is connected with the signal input end of the pulse width modulator, and the signal output end of the pulse width modulator is connected with the signal input end of the switching converter. According to the invention, the jitter deviation of the power supply voltage can be all fed back to the voltage signal of the output end of the sampling circuit, simple and effective feedback control is realized, and the rapidity and accuracy of a power supply control system are improved.

Description

technical field [0001] The present invention relates to the technical field of voltage control, in particular to a power supply feedback control system and method. Background technique [0002] Switching power supply is a typical feedback control system, which has two important indicators of response speed and stability. Response speed is the speed at which the power supply can quickly adjust when the load changes or the input voltage changes. When the load of the switching power supply is a digital device, its current will change with the change of the logic function. For example, when FPGA is configured, the current will more than double. In order to ensure the stable output of the power supply without dropping or overshooting, the power supply must be adjusted quickly so that the final output voltage does not change. The response speed of the power supply determines the adjustment speed of the power supply. [0003] In terms of power feedback design, there are the foll...

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Application Information

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IPC IPC(8): H02M3/156
CPCH02M3/156Y02B70/10
Inventor 李力生
Owner 北京华芯微半导体有限公司
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