LM386功放集成电路的应用

作者: 佚名   发布日期:2006-03-23 14:31   查看数:0   出自:http://www.xbdz.com/LM386.htm

LM386芯片资料 (英文描述:The LM386 is a power amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.The inputs are ground referenced while the output automatically biases to one-half the supply voltage. The quiescent power drain is only 24 milliwatts when operating from a 6 volt supply, making the LM386 ideal for battery operation.)
LM386电源电压4--12V,音频功率0.5w。LM386音响功放是由NSC制造的,它的电源电压范围非常宽,最高可使用到15V,消耗静态电流为4mA,当电源电压为12V时,在8欧姆的负载情况下,可提供几百mW的功率。它的典型输入阻抗为50K。
LM386低电压音频功率放大器的原理与典型应用电路图 一文中介绍了它的几种典型应用电路图.这里在列举一些.:
LM386的内部结构

LM386的放大器(本放大器的总电压增益为X200,是通过脚1、8之间有效地短路内部阻抗实现的。)

LM386放大器

LM386作调幅收音机

LM386音频感应器

LM386助听器电路图

LM386振荡器

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