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Sound switching power supply

A switching power supply and audio technology, applied in electrical components, adjusting electrical variables, instruments, etc., can solve problems such as increased hardware costs, difficulties in production and maintenance, waste of circuit resources, etc., and achieve simple circuits, good heat dissipation effects, and strong overload capacity Effect

Inactive Publication Date: 2015-07-15
SHENZHEN TTK TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure of switching power supply commonly used in the prior art is as figure 1 As shown, in this structure, the sampling feedback unit samples the output power of the secondary side, and uses the photoelectric isolation device to feed back the sampling result to the primary side, which can effectively stabilize the output voltage. According to P=UI, when the power is constant , if the voltage is constant, the current is basically kept constant, and the distortion is large and the sound quality is poor when the sign

Method used

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Embodiment Construction

[0014] The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0015] Definitions of terms used in this application:

[0016] PWM: Pulse Width Modulation pulse width modulation.

[0017] Thermal conductivity: Thermal conductivity refers to the heat transferred through an area of ​​1 square meter within 1 second for a material with a thickness of 1m and a temperature difference of 1 degree between the two sides of the material under stable heat transfer conditions. The unit is W / m·degree .

[0018] This application is an audio switching power supply, such as figure 2 As shown, it includes a primary rectification and filtering unit 11 , a primary coil 12 , an auxiliary bias coil 13 , a bias rectification and filtering unit 14 , a control module 10 , a secondary coil 15 and a secondary rectification and filtering unit 16 .

[0019] The primary rectifying and filtering unit 11 rectifies and f...

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Abstract

The invention provides a sound switching power supply. A PWM (pulse width modulation) control unit is encapsulated in a metal casing by using heat-conductive epoxy resin, the heat conduction effect is good, the insulation performance is high, the EMC (electro-magnetic compatibility) effect is good, the sound quality is improved, and the power supply is higher in environmental suitability, low in cost and convenient to produce and maintain; load power of a secondary coil is sampled by using an auxiliary bias coil, the PWM control unit outputs voltage stably according to a sampling result, and a circuit is simple in structure and low in cost; the sound switching power supply adopts open-loop circuit design, is high in overload capacity and can meet the large dynamic demand during music playing.

Description

technical field [0001] The present application relates to the audio field, in particular to an audio switching power supply. Background technique [0002] At present, most of the audio power supplies on the market are realized by industrial frequency transformers, which convert the 220V power supply voltage to 12V or other output voltages, which have the advantages of simple structure, strong overload capacity, and large signal dynamics; The cost advantages of frequency transformers are becoming less and less obvious, and they have disadvantages such as low conversion efficiency, large standby power consumption, and large volume. Because of its small size, light weight, low power consumption, high efficiency, small ripple, low noise, high intelligence, and easy expansion, switching power supplies are widely used in various electronic devices. The structure of switching power supply commonly used in the prior art is as figure 1 As shown, in this structure, the sampling feed...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/28
Inventor 陈胜奇
Owner SHENZHEN TTK TECH
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