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A power amplifier circuit based on lm3886 chip

A technology of LM3886 and power amplifier circuit, applied in power amplifier, amplifier protection circuit arrangement, improving amplifier to reduce nonlinear distortion, etc. It can solve the problems of poor working stability, many peripheral components, complex production and debugging, etc., and achieve complete protection function , less external components, stable and reliable work

Active Publication Date: 2018-05-22
SUZHOU INST OF TRADE & COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are still some deficiencies in the design of the power amplifier circuit of the LM3886 chip, such as many peripheral components, complex production and debugging, poor working stability, etc.

Method used

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  • A power amplifier circuit based on lm3886 chip

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Embodiment Construction

[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0016] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0017] The circuit connection schematic diagram of figure of the present invention is as figure 1 As shown, the power amplifying circuit based on the LM3886 chip includes the LM3886 chip, and also includes first to ninth resistors and first to eighth capacitors, wherein: one end of the first resistor is grounded, and the other end of the first resistor The second resistor is connected to one end of the first ca...

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Abstract

The invention discloses a power amplifying circuit based on an LM3886 chip. The specific circuit design includes the LM3886 chip, and also includes first to ninth resistors and first to eighth capacitors connected to the LM3886 chip. The present invention can also superimpose the operation amplifier NE5532 chip or the AD827 chip as the front linear amplifier circuit and the tone amplifier circuit. The circuit design adopted in the present invention has high output power, small distortion, complete protection functions, few peripheral components, easy fabrication and debugging, and stable and reliable operation. The power amplifying circuit has the characteristics of simplicity and applicability.

Description

technical field [0001] The invention discloses a power amplifying circuit based on an LM3886 chip, and relates to the technical field of high-power amplifying integrated circuit design. Background technique [0002] LM3886 is a new type of high-power audio amplifier integrated circuit launched by NS Corporation (National Semiconductor Corporation) of the United States. The TF behind it is a fully insulated package. Compared with LM1875T, its power is larger, and it can reach 68W at the rated operating voltage. The continuous undistorted average power also has a relatively complete overvoltage, overcurrent and overheating protection function. The most valuable thing is that it has the function of automatically resisting the current impact when switching on and off, so that the speaker can work safely. The excellent performance of LM3886 has made it widely used in audio production in recent years. Many finished power amplifiers have directly applied it as a post-stage power am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F1/52H03F3/20
Inventor 武艳田英陈玲玲张静崔久剑
Owner SUZHOU INST OF TRADE & COMMERCE
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