The LM4667MM is a filter-less high efficiency 1.3W Switching Audio Amplifier features an innovative modulator that eliminates the LC output filter used with typical switching amplifier. Eliminating the output filter reduces parts count, simplifies circuit design and reduces board area. The LM4667 processes analogue inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators. Operating on a single 3V supply, it is capable of driving 8R transducer loads at a continuous average output of 450mW with less than 1%THD+N. Its flexible power supply requirements allow operation from 2.7 to 5.5V. This audio amplifier features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low. The amplifier has short circuit protection against a short from the outputs to VDD, GND or across the outputs.
No output filter required for inductive transducers
(EN)
