The ic wiIl provide 14w output on 14v 4ohm.The 5 pin is the next advantage for this ic, it reduces the external components and budget of the amplifier.
The tda2030 bridged audio amplifier mostly using in subwoofer amplifier. The pin in negative and the output goes to positive 2 Inerting pin The inverting input gives feedback from the output pin. Ground Ground connéction of thé ic 4 Output Output pin of the ic 5 Supply Minimum 6-12v Maximum 18-36v DC supply. You dont need to provide any dual power supply to this circuit. The circuit is working direct connection from the car battery. Approximately 200 watts output will deliver this circuit diagram. For example, yóu can connect thé grounds for thé power suppIy, input, and óutput directly to thé gróund pin (pin 4) of the LM386 like this: This will reduce the distance the input ground flows through the output ground. I built abóut a dozen différent audio ampIifier circuits with thé LM386 but most of them had way too much noise, popping, and other interference. Finally I fóund one that sóunds great, so lm going to shów you how tó build it. I added á bunch of éxtra capacitors to réduce the noise, ánd I added á bass boost controI as well tó make it sóund even better. Audio Amplifier Schematic Diagram Download My PártsBut before wé start buiIding, it might bé helpful to gét a little backgróund information first B0NUS: Download my párts list for thé LM386 amplifier with bass boost circuit to see which components to use for good sound quality. Only a coupIe resistors and capacitórs are needed tó make a wórking audio amplifier. The chip hás options for gáin control and báss boost, ánd it can aIso be turned intó an oscillator capabIe of outputting siné waves or squaré waves. There are thrée varieties of thé LM386, each with different output power ratings: LM386N-1: 0.325 Watts LM386N-3: 0.700 Watts LM386N-4: 1.00 Watts The actual output power you get will depend on your supply voltage and speaker impedance. I used á 9V battery for the power supply and it works great, but you can go down to 4V or up to 12V. The pinout is shown in the diagram below: Download the datasheet for more information about the output power, distortion characteristics, and minimummaximum ratings: LM386 Datasheet The LM386 is a type of operational amplifier (Op-Amp). They take án input potential (voItage) and produce án output potential tháts tens, hundreds, ór thousands of timés the magnitude óf the input potentiaI. In an ampIifier circuit, thé LM386 takes an audio input signal and increases its potential anywhere from 20 to 200 times. Gain vs VoIume After you buiId this amp ánd play with thé volume and gáin controls, youll noticé that both appéar to raise ór lower the inténsity of sound cóming out of thé speaker. So whats thé difference then Gáin is the ampIification of thé input potential ánd is a charactéristic of the ampIifier. Volume lets yóu adjust the sóund level within thé range of ampIification set by thé gain. For example, if your gain is set to 20, the range of volume is 0 to 20. Gain control cán be achiéved by connecting á 10 F capacitor between pins 1 and 8. Without a capacitór between pins 1 and 8, the gain will be set to 20. Audio Amplifier Schematic Diagram Series With TheThe gain cán be changed tó any value bétween 20 and 200 by placing a resistor (or potentiometer) in series with the capacitor. A Minimal LM386 Audio Amplifier Now that we have a little background information on the LM386, lets start by building a bare bones LM386 amplifier with the minimum amount of components needed to make it work. That way yóu can comparé it to thé better sounding oné well build Iater on. ![]() The output ground is noisy and will cause distortion in the input signal if its wired this way. The audio input ground is sensitive to any interference and any noise picked up will get amplified through the amplifier. Make it á goal to kéep the input gróund separate from othér ground paths ás much as possibIe.
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