Power supply method and power supply apparatus preventing audio noise

A power supply device, power supply technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as annoying

Inactive Publication Date: 2016-12-07
CHICONY POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] When the power supply is operating in burst mode, it can be very ann

Method used

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  • Power supply method and power supply apparatus preventing audio noise
  • Power supply method and power supply apparatus preventing audio noise
  • Power supply method and power supply apparatus preventing audio noise

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Embodiment Construction

[0036] For the detailed description and technical content of the present invention, please refer to the following detailed description and accompanying drawings as follows, and the accompanying drawings and detailed description are for illustration purposes only, and are not intended to limit the present invention.

[0037] Please refer to figure 1 , which is a flow chart of the first embodiment of the power supply method for avoiding audio noise of the present invention. The power supply method for avoiding audio noise of the present invention comprises the following steps:

[0038] S02: When a power supply device is in a burst mode and a burst frequency of the power supply device falls into an audio frequency range, the power supply device leaves the burst mode to avoid audio noise News.

[0039] S04: After the power supply device leaves the burst mode, the power supply device enters a normal working mode.

[0040] Wherein, the audio range is between 20 Hz and 20,000 Hz; ...

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PUM

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Abstract

The invention discloses a power supply method and power supply apparatus preventing audio noise. The power supply apparatus preventing the audio noise comprises a voltage input end, a power switch circuit, a voltage output end, a pulse width modulation signal generation circuit and a pulse intermittent frequency detection circuit. The pulse width modulation signal generation circuit controls the power switch circuit by means of pulse width modulation signals to enable the power supply apparatus preventing the audio noise to enter a pulse intermittent mode; the pulse intermittent frequency detection circuit detects a pulse intermittent frequency of the power switch circuit; if the pulse intermittent frequency falls into an audio scope, the pulse intermittent frequency detection circuit notifies the pulse width modulation signal generation circuit that the pulse intermittent frequency falls into the audio scope; and the power supply apparatus preventing the audio noise leaves the pulse intermittent mode so as to prevent the audio noise.

Description

technical field [0001] The invention relates to a power supply method and a power supply device, in particular to a power supply method for avoiding audio noise (noise) and a power supply device for avoiding audio noise. Background technique [0002] When the power supply device is in the standby mode or the light load mode, the power supply device will enter a burst mode to save energy. [0003] Human beings can hear sounds between about 20 Hz and 20,000 Hz, which is called audio frequency. [0004] When the power supply is operating in burst mode, it can be very annoying if the burst frequency of the power supply falls into the audio frequency range. Contents of the invention [0005] In order to improve the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a power supply method that avoids audio noise. [0006] In order to improve the above-mentioned shortcomings of the prior art, another object of the present invention ...

Claims

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Application Information

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IPC IPC(8): H02M1/44
Inventor 萧永鸿萧正昌
Owner CHICONY POWER TECH CO LTD
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