High Efficiency Filter Circuit 3W Switching Audio Amplifier
This
is a design circuit for filter circuit for amplifier. This circuit is a
simple design circuit that is based on LM4670. This is the figure of
the circuit;
The
LM4670 is designed to meet the demands of mobile phones and other
portable communication devices. Operating on a single 5V supply, it is
capable of driving a 4 speaker load at a continuous average output of
2.3W with less than 1% THD+N. Its flexible power supply requirements
allow operation from 2.4V to 5.5V. The LM4670 has high efficiency with
speaker loads compared to a typical Class AB amplifier. With a 3.6V
supply driving an 8 speaker, the IC's efficiency for a 100mW power level
is 77%, reaching 88% at 600mW output power. [Schematic circuit source:
National Semiconductor Notes].
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