Removing the output filter reduces the part count, simplifies circuit design, and reduces board area. The LM4665 processes analogue input with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.
Rochester re-introduces LM4665LDX-G audio amplifiers
With the full authorisation of National Semiconductor, Rochester Electronics has re-introduced the RoHS-compliant LM4665 series, a fully integrated single-supply high efficiency switching audio amplifier. The LM4665 series features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers.