Large-power power amplifier light-load power reduction circuit and device, and electronic equipment
An electronic equipment and power reduction technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems such as poor user experience, heat generation of power devices, high power consumption and heat generation of products, etc.
Active Publication Date: 2019-01-15
TCL TECH ELECTRONICS (HUIZHOU) CO LTD
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Problems solved by technology
[0002] At present, kilowatt class D power amplifiers generally have a relatively high operating voltage, and the AC-to-DC power supply module often adopts a resonant conversion circuit topology. The excitation current leads to a large loss of power devices. In addition, the noise requirements need to be met. Because the system fan is turned off under the low load state of the power amplifier, the power device on the primary side of the resonant conversion circuit on the power board and the power device of the power amplifier circuit will heat up severely, which shortens the product life. The product consumes a lot of power and heat, and the user experience is not good.
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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positional relationship, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly.
[0031] In addition, the ...
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The invention discloses a large-power power amplifier light-load power reduction circuit and device, and electronic equipment. The large-power power amplifier light-load power reduction circuit comprises a voltage division circuit, a micro-control unit, a voltage regulation circuit, a protection circuit and a power supply output circuit, wherein the micro-control unit controls the voltage regulation circuit to lower output voltage so as to lower exciting current in a transformer and exciting current in a power amplifier filtering inductor to lower power consumption and device surface temperature; and the protection circuit avoids a situation that power supply output voltage suddenly rises and lowers to cause the power amplifier to emit noise, and the power supply is prevented from triggering over-current protection.
Description
technical field [0001] The invention relates to the technical field of audio playback, in particular to a high-power power amplifier light-load power reduction circuit, device and electronic equipment. Background technique [0002] At present, kilowatt class D power amplifiers generally have a relatively high operating voltage, and the AC-to-DC power supply module often adopts a resonant conversion circuit topology. The excitation current leads to a large loss of power devices. In addition, the noise requirements need to be met. Because the system fan is turned off under the low load state of the power amplifier, the power device on the primary side of the resonant conversion circuit on the power board and the power device of the power amplifier circuit will heat up severely, which shortens the product life. The product consumes a lot of power and generates a lot of heat, and the user experience is not good. Contents of the invention [0003] The main purpose of the prese...
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Login to View More IPC IPC(8): G05F1/625
CPCG05F1/625
Inventor 温锡奎刘志成陈成辉程丽群
Owner TCL TECH ELECTRONICS (HUIZHOU) CO LTD