Filterless High Efficiency 1.3W Switching Audio Amplifier

The LM4667 is a fully integrated single-supply high efficiency switching Audio Amplifier It features an innovative Modulator that eliminates the LC output Filter used with typical switching Amplifiers Eliminating the output Filter reduces parts count, simplifies circuit design, and reduces board area. The LM4667 processes Analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width Modulators
The LM4667 is designed to meet the demands of mobile phones and other portable Communication devices. Operating on a single 3V supply, it is capable of driving 8 transducer loads at a continuous average output of 450mW with less than 1%THD+N. Its flexible power supply requirements allow operation from 2.7V to 5.5V.
The LM4667 has high efficiency with an 8 transducer load compared to a typical Class AB Amplifier With a 3V supply, the IC's efficiency for a 100mW power level is 74%, reaching 84% at 450mW output power.
The LM4667 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a Logic low (GND).
The LM4667 has fixed selectable gain of either 6dB or 12dB. The LM4667 has short Circuit Protection against a short from the outputs to VDD, GND, or across the outputs.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM4667ITL/NOPB Texas Instruments Filterless High Efficiency 1.3W Switching Audio Amplifier 9-DSBGA -40 to 85
LM4667MM/NOPB Texas Instruments Filterless High Efficiency 1.3W Switching Audio Amplifier 10-VSSOP -40 to 85
LM4667 's PackagesLM4667 's pdf datasheet
LM4667MMBD
LM4667MM SOIC
LM4667MMX SOIC
LM4667ITL
LM4667ITLX




LM4667 Pinout, Pinouts
LM4667 pinout,Pin out
This is one package pinout of LM4667,If you need more pinouts please download LM4667's pdf datasheet.

LM4667 Application circuits
LM4667 circuits
This is one application circuit of LM4667,If you need more circuits,please download LM4667's pdf datasheet.


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