Part Number : BT4730D ( = TDA7379 )

The LM386 is a mono amplifier IC with a default fixed gain of 20, and may be set to 200 (gain = 200) after the addition of a 10-µF capacitor between pin 1 and pin 8. The main advantage of this IC is its bass boost function with the addition of only two external components.

Function : Audio Power Amplifier

Package : ZIP 15 Pin

Manufacturers : Boomtech

Image :

Description :

The BT4730D is a new technology class AB audio processor amplifier able to work either in DUAL BRIDGE or QUAD SINGLE ENDED configuration. The exclusive fully complementary structure of the output stage and the internally fixed gain guarantee the highest power performances with extremely reduced component count. The on board clip detector simplifies gain compression operation. The fault diagnostic makes it possible to detect mistakes during the set assembly and wiring in the equipment.

Pinout and Circuit

Other data sheets within the file : BT4730

BT4730D Datasheet

Posts related to ‘ Audio Power Amplifier ‘

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.

Models[edit]

Malayalam remix mp3 songs free download 123musiq. There 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]}

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]

D salvatore theory and problems of international economics 4th edition. JRC devices, marked as 386 JRC, are sometimes misleadingly referred to as the JRC386.

SPICE simulation models[edit]

Although 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:

• The original 'No-Frills LM386 Model' by Dave Dilatush.^[8]
• An improved model, 'The EasyEDA LM386EE spice model' developed for the simulations of the 'Tesseract Guitar Practice Amplifier' project.^[9]

Usage in guitar amplifiers[edit]

• The LM386 is one of the most common amps used in DIY guitar preamplifiers and sustainers due to its ability to run on a single 9V battery.
• The EasyEDA 'Tesseract' Guitar Practice Amplifier is a versatile design based on the LM386 and features distortion and full-wave rectification effects.^[10]
• The well-known 'Smokey Amp' created by Bruce Zinky uses an LM386 and is notable for being able to fit in a cigarette package.
• The 'Little Gem' and 'Little Gem MkII' are modified/cloned versions of the 'Smokey Amp'.^[11]
• The 'Ruby' amp^[12] is a modified version of a Little Gem amplifier.
• The Marshall MS-2 and MS-4 miniature practice amplifiers use a single-in-line packaged NJM386 manufactured by JRC.

Usage in amateur radio[edit]

The LM386 is very commonly used in the audio amplifier of low power QRP amateur radio rigs, like the Pixie.

See also[edit]

References[edit]

1. ^'Data Sheet (National Semiconductor)'(PDF). Texas Instruments. 2000. Retrieved 4 Nov 2013.
2. ^'Data Sheet (Unisonic Technologies Co.)'(PDF). Unisonic Technologies Co. 2014. Retrieved 2 Sep 2015.
3. ^'Data Sheet (New Japan Radio Co. Ltd.)'(PDF). New Japan Radio Co. Ltd. Retrieved 29 Aug 2015.
4. ^'Data Sheet (New Japan Radio Co. Ltd.)'(PDF). New Japan Radio Co. Ltd. Retrieved 29 Aug 2015.
5. ^'Data Sheet (New Japan Radio Co. Ltd.)'(PDF). New Japan Radio Co. Ltd. Retrieved 2 Sep 2015.
6. ^'Single-in-line package outline drawing (New Japan Radio Co. Ltd.)'(PDF). New Japan Radio Co. Ltd. Retrieved 2 Sep 2015.
7. ^'Texas Instruments completes acquisition of National Semiconductor'.
8. ^'LM386 audio amp Spice model?'.
9. ^'The EasyEDA Tesseract Guitar Practice Amp simulation files'.
10. ^'Tesseract Guitar Practice Amp'.
11. ^'Little Gem amps at runoffgroove'.
12. ^'Ruby amp at runoffgroove'.

External links[edit]

Historical Data Books

• Linear Databook (1980, 1376 pages), National Semiconductor, includes LM386 datasheet