| 词条 | LM386 | ||||||||||||||||||||||||
| 释义 |
The LM386 is an integrated circuit containing a low voltage audio power amplifier.[1] It is suitable for battery-powered devices such as radios, guitar amplifiers, and hobby electronics projects. The IC consists of an 8 pin dual in-line package (DIP-8) and can output 0.25 to 1 watts of power depending on the model using a 9-volt power supply. ModelsThere are three different models of the LM386 that have slightly different specifications, outlined below.
The LM386 was invented by Ernie Leroy Long at Motorola in 1969. It was originally for part of a fuel injection system for a Ford Car.{{Citation needed|date=February 2018}} Almost identical versions of the device are available from Unisonic (Unisonic Technologies Co. or UTC) as the LM386 [2] and the New Japan Radio Co. Ltd. (JRC) [3] as the NJM386 [4] and NJM386B.[5] The JRC devices are also available in a single-in-line package.[6] JRC devices, marked as 386 JRC, are sometimes misleadingly referred to as the JRC386. SPICE simulation modelsAlthough National Semiconductor and Texas Instruments (who bought Nat Semi in 2011[7]) do not provide an official SPICE model for the LM386, there are two independently developed models freely available:
Usage in guitar amplifiers
Usage in amateur radioThe LM386 is very commonly used in the audio amplifier of low power QRP amateur radio rigs, like the Pixie. See also
References1. ^{{cite web | url=http://www.ti.com/lit/ds/symlink/lm386.pdf | title=Data Sheet (National Semiconductor) | publisher=Texas Instruments | year=2000 | accessdate=4 Nov 2013}} 2. ^{{cite web | url=http://www.unisonic.com.tw/datasheet/LM386.pdf| title=Data Sheet (Unisonic Technologies Co.) | publisher=Unisonic Technologies Co.| year=2014 | accessdate=2 Sep 2015}} 3. ^{{cite web | url=http://www.njr.com/semicon/PDF/NJM386_E.pdf| title=Data Sheet (New Japan Radio Co. Ltd.) | publisher=New Japan Radio Co. Ltd. | accessdate=29 Aug 2015}} 4. ^{{cite web | url=http://www.njr.com/semicon/PDF/NJM386_E.pdf| title=Data Sheet (New Japan Radio Co. Ltd.) | publisher=New Japan Radio Co. Ltd. | accessdate=29 Aug 2015}} 5. ^{{cite web | url=http://www.njr.com/semicon/PDF/NJM386B_E.pdf| title=Data Sheet (New Japan Radio Co. Ltd.) | publisher=New Japan Radio Co. Ltd. | accessdate=2 Sep 2015}} 6. ^{{cite web | url=http://www.njr.com/semicon/PDF/package/SIP8_E.pdf| title=Single-in-line package outline drawing (New Japan Radio Co. Ltd.) | publisher=New Japan Radio Co. Ltd. | accessdate=2 Sep 2015}} 7. ^{{cite web|url=http://investor.ti.com/releasedetail.cfm?ReleaseID=607786|title=Texas Instruments completes acquisition of National Semiconductor}} 8. ^{{cite web|url=https://groups.google.com/forum/#!topic/sci.electronics/Ssv3p_PDaw8|title=LM386 audio amp Spice model?}} 9. ^{{cite web|url=https://easyeda.com/example/Tesseract_Guitar_Practice_Amp_simulation_files-H0ca8IFDB|title=The EasyEDA Tesseract Guitar Practice Amp simulation files}} 10. ^{{cite web|url=https://easyeda.com/example/Tesseract_Guitar_Practice_Amp-MjP71jBni |title=Tesseract Guitar Practice Amp}} 11. ^{{cite web|url=http://www.runoffgroove.com/littlegem.html |title=Little Gem amps at runoffgroove}} 12. ^{{cite web|url=http://www.runoffgroove.com/ruby.html|title=Ruby amp at runoffgroove}} External links{{Commons category|LM386 power amplifier}}
1 : Linear integrated circuits |
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