Power consumption measuring and control method for sound system switch power source as well as special device thereof

Abstract

The invention relates to a power consumption detecting controlling method of sound equipment switch power supply and a relative device, which is characterized in that a power detection controller is arranged in the switch power supply of sound equipment, the power detection controller can detect the real-time output power of the switch power supply, wherein (1) when the output power of the switchpower supply is not same as the nominal power of load, the controller controls the output voltage of the switch power supply stable and automatically adapts the output power for load change, (2), when the output power is higher than load nominal power or is increased, the controller generates an overpower signal to reduce the output voltage of the switch power supply, automatically adjust the output voltage and adapt the output power for the load change, thereby reducing internal power consumption. The invention can reduce internal power consumption of sound equipment at high-power operation,with low consumption, high dynamic response and low cost.

Description

technical field [0001] The invention relates to a method for measuring and controlling power consumption of a switching power supply of an audio system and a special device thereof. It belongs to the technical field of audio system switching power supply. Background technique [0002] At present, switching power supplies are widely used in various electronic devices because of their excellent characteristics such as small size, light weight, high efficiency, small ripple, low noise, and easy expansion. Since the switching power supply in the prior art can only output a constant switching voltage, it can only be used as a voltage stabilizing source. For audio power amplifier systems where the power supply is required to automatically adjust the output voltage as the load changes, this type of switching power supply and the existing ordinary switching power supply cannot be used in places such as audio power amplifier systems that automatically adjust the output voltage when ...

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Problems solved by technology

[0003] The first purpose of the present invention is to solve the problem in the prior art that the output voltage of the switching power supply cannot follow the change of the load, which may easily cause the increase of the internal loss of the amplifier system, and provide a method for measuring and controlling the power consumption of the switching power supply of the audio system

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