A power amplifier circuit based on lm3886 chip

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...

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