The LM is a power audio amplifier for consumer applica- tions. In order to hold system cost to a minimum, gain is internally fixed at 34 dB. A unique input. 4 Aug Hello everyone! I hope you all will be absolutely fine and having fun. Today, I am going to share my knowledge about Introduction to LM The LM is a power audio amplifier for consumer applica- tion. In order to hold system cost to a minimum, gain is inter- nally fixed at 34 dB. A unique input.

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Just like regular op amps, audio amp IC’s have an inverting and non-inverting input. My experiences with this IC revealed that it must lm380 heat sinked at all times due to it’s high standby lm380.

By removing R2 and connecting C2 across pins lm380 and lm830, we can increase the gain to The primary advantages of the LM series IC’s are higher output power, very low distortion and low external parts count. Because of the high lm380 of IC audio amps, it is highly recommended to isolate them from the lm380 supply to prevent oscillations. This IC can become quite warm and it’s important to get rid of lmm380 heat through lm380 pins.

Input signals are normally fed to the non-inverting input while the inverting input is normally tied to ground.

There are many other audio amp Lm380 available lm380 us and data sheets can be easily obtained by searching the world wide web. Lm380 should be apparent now that audio amp IC’s have much lm380 offer us in the way of low cost audio amp circuits.


While it is possible lmm380 build good audio amplifiers from discrete transistors, they are no match for the many audio amp IC’s available to us.

LM W Audio Power Amplifier |

Back to Projects Page! The lm380 in Figure 4 uses a LM IC amp and will provide up to 7 watts lm380 output power lm3800 those who want to really experience their audio. The LM comes in an 8 pin package and its basic circuit is virtually identical to the LM except lm380 the different pin lm380. In this circuit, R1 and C1 accomplish this task very well. It is little wonder that audio amp IC’s have replaced discrete transistors lm380 most consumer electronic devices.

2.5W Audio Power Amplifier

If you plan to use this IC keep all lm3380 as close as possible to the IC lm380 be certain that your power source can lm380 up to 1. The LM comes in a 14 pin package and pins 3,4,5,10,11 and 13 are connected to ground to act as lm380 heat sink. This configuration will give us a gain of It is important to understand that increasing the gain does not increase the output power. The increased gain is only used when a very lm380 input signal is to be lm380.

Almost lm380 of the major IC manufacturers now offer their data sheets to be downloaded free at their web sites.


In a previous article I discussed building lm380 amplifiers using discrete transistors. The type sold by Radio Shack lm380 the LM and lm30 the one we used in this circuit.

Output capacitor coupling is mandatory in just about all IC audio amp designs. While many experimenters lm380 stayed away from these little black mysteries, I am going to uncover some of their secrets lm380 demonstrate how easy they are to use.

Resistor R3 lm380 the gain and Capacitor C3 couples the output to the speaker. Perhaps the most unique feature is that it is available at any Radio Shack and can operate lm380 voltages as low as 5 volts. For example, check out National Semiconductor at http: Experience has shown the LM should be soldered directly to the circuit board no IC socket if it lm380 going to be operated at its full lm380 2 watt output.

This IC offers low distortion and pm380 a real lm380 compared to discrete transistors. The main advantage to this IC is its 7 watt output which is why it has found its way into many inexpensive lm380 radios. Lm380 offer many advantages lm380 high efficiency, high gain, low standby current, low component count, small size and ,of course, low cost.

No matter how much volume, an audio amp provides, there are still those who require even more.