LM48100QMHE/NOPB Integrated Circuits (ICs)

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LM48100QMHE/NOPB is a dual-channel audio amplifier designed for cellular phones that provides high audio power output of up to 1.2 watts per channel with minimum THD+N. It features low profile, low quiescent current, low distortion, and low noise to suit mobile phone applications. Extremely low hysteresis current, as low as 75mA (=5μA) typ, ensures very low THD+N when the output volume is changed over a wide range of input voltage. The audio power amplifier\'s output power capability includes 1 watt into 16 Ω , 1.2 watts into 8 Ω , and 0.25 watts into 32 Ω loads. The LM48100QMHE/NOPB is offered in a monolithic package with four power terminals, allowing thermal and electrical connection of ground planes for greater efficiency of the heat sink. It is also available in a 10-pin LLP Plastic package and operates over a -40℃ to +85℃ temperature range.

The LM48100QMHE/NOPB offers a wide range of uses, from providing audio power for cellular handsets to other portable and low-power applications. It is a high-performance device with a low quiescent current of only 250 mW typ and typical audio power at 10% THD of 1.2 watts into a 8 Ω load. It also provides a high damping factor of >314 typ and a wide supply voltage range (2.5V to 5.5V).The major features of the LM48100QMHE/NOPB include a low profileQfn package, wide supply voltage range, low quiescent current, no output DC offset at shutdown, low THD+N, low hysteresis current, low EMI and low thermal resistance. The LM48100QMHE/NOPB has a working principle of input differential amplifier that accepts a differential input signal, making it ideal for use with stereo-encoded signals. The differential amplifier biases the gate of the output MOSFET, which then amplifies the signal. The resulting amplified signal is then sent to the speaker.The speaker is driven by the output MOSFET, which is connected in parallel with a current source. The current source ensures that the output of the speaker is symmetrically amplified, providing better efficiency and preventing damage to the speaker due to current imbalance. This results to high power output and low distortion output.

In summary, the LM48100QMHE/NOPB is a high-performance audio power amplifier designed for cellular phones, featuring low profile, low quiescent current, low distortion, low noise and high audio power output. It operates over a wide range of input voltages and enables very low THD+N rates at higher output power. Its 10-pin LLP Plastic package provides excellent thermal and electrical connections for cost-effective implementation of thermal management for mobile and other applications.

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