LM4873LQX

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The LM4873LQX is a dual audio power amplifier IC with a wide range of uses in various electronic devices. It is designed to reduce the need for a separate power-supply and control circuitry, with a single supply operating from 3V to 10V. This makes it particularly suitable for portable audio applications, since it can be powered directly from a single cell battery.

The LM4873LQX features high output current capability and an exceptionally low quiescent current of only 4mA at 5V. This is important, since it means that the power drain on the battery will be minimal even when playing music, allowing the device to operate for longer on a single charge. The maximum output current available is 3A, with a 5V power supply and a single 1Ω resistor connected to the Load Output pins.

The LM4873LQX also includes the necessary protection circuitry that prevents it from drawing excessive current from the power supply, or from the battery. This includes both over-voltage and over-current protection, as well as thermal shutdown for preventing overheating during operation. This makes the IC extremely robust and reliable, with no need for additional external circuitry for protection.

In terms of its working principle, the LM4873LQX is a dual, low-power audio amplifier. Its pin-out is arranged such that it can be used for applications such as driving headphones, speakers, or other audio load types. The IC works by taking its power from the 5V supply pin and then amplifying this power to the required level before delivering it to the load. This is done by a combination of a differential amplifier, voltage gain stages and the output buffer.

The LM4873LQX is a widely-used IC, being employed in many portable audio devices such as MP3 players, mobile phones and tablet computers. It is also used in start/stop applications, in which the device switches on and off with a single button press. The IC also has a wide input dynamic range, capable of playing both low and high-level frequencies with equal accuracy.

In summary, the LM4873LQX is a dual, low-power audio amplifier IC with a wide range of applications in various electronic devices. It works by taking its power from a 5V supply and then amplifying it before sending it to the load. It features high output current capability, low quiescent current, and a wide input dynamic range. It is well-suited to portable audio devices due to its low power drain, and is also suitable for start/stop applications.

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