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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In order to hold system cost to a. However, the performance is such that I doubt it would meet the required standards for professional use, and I have never seen an LM used in pro gear. The heatsink on the left is a commercial design which may be difficult to getmade by ‘Staver’ and is suggested for the LM – a higher voltage version of the LM I don’t think I even need to say that this IC isn’t suitable for a subwoofer. C5 is a supply bypass cap, and it should be as close to the supply pins as possible.

If you do omit C1, you will almost certainly hear some ‘scratching’ noises from the pot as it’s rotated because there’s dxtasheet small DC offset at the inputs. Distortion is acceptable at around 0. LM or LM can use a supply voltage of 10V l3m84n to 22V or 26V respectively, but don’t even think about it if you don’t include heatsinks. The package outline dayasheet standard dual-in-line.

LMN NTE Equivalent NTE IC-AF PO 2/5WATT – Wholesale Electronics

Products conform to specifications per the terms of the Texas. The power supply can be anything you have handy, including a battery. 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 leave it out or the amp may oscillate.

If you want to know more, have a look at the datasheets.

LM386, LM380 & LM384 Power Amplifiers

The quiescent output voltage is set internally to be half the supply voltage, and by default the gain is 20 26dB. These provide quite a bit of info, and lots of application circuits. The preferred method is to make or buy copper heatsinks that can be soldered directly to the pins.


Uses include simple phonograph amplifiers, intercoms, line drivers, teaching machine outputs, alarms, ultrasonic drivers, TV sound systems, AM-FM radio and sound projector systems. Uses range from signal tracers, workshop monitor amps to listen to distortion residuals for exampleor just a simple project for the fun of it.

The tabs solder to the IC pins, and the underside of the heatsink should be coated with heatsink compound to increase the thermal conductivity. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of. That means that the maximum input voltage will be around mV RMS sinewave at the onset of clipping. The heatsink on the right can be fabricated from sheet copper, and I added two ‘spigots’ that can be inserted into the PCB to stabilise the heatsink against vibration.

Figure 1 – LM Amplifier Schematic. 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.

Feel free to include a nF multilayer ceramic bypass cap as close to the supply pins as possible it’s not shown in the above drawings.

Commercial use is prohibited without express written authorisation from Rod Elliott. 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. A unique input stage allows ground referenced input signals.

All pin numbers refer to the pin LM and the LM The only thing that even approaches being critical is the bypass cap.

LMN datasheet & applicatoin notes – Datasheet Archive

However, that varies with supply voltage and load impedance so you’ll need to assess the circuit under your operating conditions. Maximum output power into an 8 ohm load is around mW for acceptable distortion.


Add a resistor and capacitor in series between pins 1 and 8 for intermediate gains. The gain can be changed by adding a capacitor between pins 1 and 8. A copper lead frame is used with the center three.

It would be worthwhile to give it a very light spray with matte black paint to improve radiation. It usually won’t need to be anything special, but it will usually have to be cheap and easy to build. 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. That’s one of the reasons that datashee higher voltage ICs LM and LM have a higher gain than the LM – it’s simply to ensure full output swing before the input stage causes distortion.

All trademarks are the property of their respective owners. The supply voltage needs to be no more than 12V and the load impedance should not be less than 8 ohms. It’s important to understand that the LM is not an opamp, and none of the traditional opamp circuits can be applied. daasheet

Every so often, you’ll find a need for a low power amplifier. If these pins are linked by a 10uF capacitor, the gain is 46dB.

You can use either input for the signal, and simply ground the unused input. Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. It’s theoretically possible if you use a high supply voltage and a 16 or 32 ohm load, but that’s not recommended because device dissipation will be well in excess of that which the device can handle safely.

The minimum useful voltage is around 6V, and 12V is the maximum suggested for the LM