LMN/NOPB Texas Instruments Audio Amplifiers 5-W AUDIO POWER AMP datasheet, inventory, & pricing. LMN Datasheet, LMN National Semiconductor 5-Watt Audio Amplifier Datasheet, buy LMN. The LM is a power audio amplifier for consumer applica- tion In order to hold system cost to a minimum gain is internally fixed at 34 dB A unique input stage.

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LMN Datasheet(PDF) – TI store

See SNAA for circuit details. The only thing that even approaches being critical is the bypass cap. The package outline is standard dual-in-line. The Zobel network at the output is needed to ensure stability when leads are attached, but even if the speaker is only a few millimetres away, don’t lm384nn it out or the amp may oscillate.

While a PCB would be handy, the cost of the board would be greater than the cost of the IC and other parts and it’s not worthwhile. The power supply can be anything you have handy, including a battery.

Quiescent Output Voltage is at One Half of the. A copper lead frame is used with the center three. I don’t think I even need to say that this IC isn’t suitable for a subwoofer.

LM386, LM380 & LM384 Power Amplifiers

The minimum useful voltage is around 6V, and 12V is the dataeheet suggested for the LM The circuit is shown for reference only, and is adapted from the datasheet but has been redrawn. Reproduction or re-publication by any means whatsoever, whether electronic, mechanical or electro-mechanical, is strictly prohibited under International Copyright laws.

The LM is a power audio amplifier for consumer.

All trademarks are the property of their respective owners. Every so often, you’ll find a need for a low power amplifier. They can be run without a heatsink, but only for low power output, and care is needed to ensure the IC doesn’t overheat.

LM from Texas Instruments

In order to hold system cost to a minimum, gain is internally fixed at 34 dB. Despite the fact that many of its functions appear to be almost identical to the LM, the two are quite different and even the 8-pin versions of each have different pinouts and are not interchangeable.


The LM is similar, but uses 50k resistors at the inputs, and has two series resistors ohms and 1. The bypass cap C2 is optional as well, but if you don’t include it the vatasheet supply rejection is rather poor, so anything other than a battery supply may cause some hum.

While you may see it rated for up to 1W output, this is a little adventurous to put it mildly. The 8-pin version is shown first. However, that varies with supply voltage and load impedance so you’ll need to assess the circuit under your operating conditions.

Note that you cannot use aluminium because it can’t be lk384n, but you may be able to use small copper tabs that are rivetted to an aluminium heatsink with heatsink compound between the two metals. The gain can be changed by adding a capacitor between pins 1 and 8. Home – IC Supply – Link. It’s important to understand that the LM is not an opamp, and none of the traditional opamp circuits can be applied. The output automatically self-centers to datahseet the.

The LM is available in two packages – 8-pin and pin. The author Rod Elliott grants the reader the right to use this information for personal use only, and further allows that one 1 copy may be made for reference while constructing the project.

If you do omit C1, you will almost certainly hear some ‘scratching’ noises from the pot as it’s rotated because there’s a small DC offset at the inputs. The 8-pin version is only suitable for low power similar to the LMbut the pin version can be fitted with small heatsink ‘flags’ that allow it to provide up to 2. The output automatically self-centers to one-half the supply voltage. The negative input signal doesn’t get cut off as you might expect, because the emitter is still positive.

The input capacitor is optional – you can connect the source or pot wiper directly to the input pin if you prefer. Production processing does not. Of the three types, the LM is the more popular. Production processing does not necessarily include testing of all parameters.


All pin numbers refer to the pin LM and the LM The quiescent output voltage is set internally to be half the supply voltage, and by default the gain is 20 26dB. C5 is a supply bypass cap, and it should be as close to the supply pins as possible. The supply voltage needs to be no more than 12V and the load impedance should not be less than 8 ohms. They are able to work with a signal that goes below zero volts Gnd because a PNP transistor is used.

The 8-pin version of the LM is capable of around 1W, but that’s under ideal conditions. It should be easy enough to fabricate a suitable heatsink if you have some sheet copper available.

5-W Audio Power Amplifier

Uses range from signal tracers, workshop monitor amps to listen to distortion residuals for exampleor just a simple project for the fun of it. Construction of any of these amps is non-critical, and Veroboard or similar is the way that most people would build datashset. Products conform to specifications per the terms of the Texas.

These are certainly not hi-fi by any stretch of the imagination, but they are fine for a utility amplifier where a bit of distortion is unlikely to be a deal-breaker. These are allegedly available, but I couldn’t find anything even remotely similar from my normal lm834n.

The LM can allegedly provide up to 5W, but don’t count on it. For best thermal performance, the heatsink s should be soldered directly to the pins, and ideally will also have a good thermal bond with the top of the IC package.

Commercial use is l384n without express written authorisation from Rod Elliott.

Maximum output power into an 8 ohm load is around mW for acceptable distortion. In order to hold system cost to a.