The LM48820 is a ground referenced, fixed-gain audio power amplifier capable of
delivering 95mW of continuous average power into a 16Ω single-ended load, with less than 1% THD+N
from a 3V power supply.
The LM48820 features a new circuit technology that utilizes a charge pump to generate a
negative reference voltage. This allows the outputs to be biased about ground, thereby eliminating
output-coupling capacitors typically used with normal single-ended loads.
Boomer audio power amplifiers were designed specifically to provide high quality output
power with a minimal number of external components. The LM48820 does not require output coupling
capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other
The LM48820 features a low-power consumption shutdown mode selectable for each channel
and a soft start function that reduces start-up current transients. Additionally, the LM48820
features an internal thermal shutdown protection mechanism.
The LM48820 contains advanced pop and click circuitry that eliminates noises which would
otherwise occur during turn-on and turn-off transitions.
The LM48820 has an internal fixed gain of 1.5V/V.
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