Texas Instruments LM4673
The LM4673 is a single supply, high efficiency, 2.65W, mono, Class D audio amplifier. The LM4673 is designed to meet the demands of mobile phones and other portable communication devices. Its flexible power supply requirements allow operation from 2.4V to 5.5V.| Part No. | LM4673 |
|---|---|
| Datasheet | LM4673 Download |
| Manufacturer |  Texas Instruments |
| Description | Class-D Audio Power Amplifier |
| Buy | Stock & Price |
FEATURES
1●2 Mono Class D Operation
● No Output Filter Required for Inductive Loads
● Externally Configurable Gain
● Very Fast Turn On Time: 17μs (typ)
● Minimum External Components
● "Click and Pop" Suppression Circuitry
● Micro-Power Shutdown Mode
● Available in Space-Saving 0.4mm Pitch DSBGA and WSON Packages
APPLICATIONS
● Mobile Phones● PDAs
● Portable Electronic Devices KEY SPECIFICATIONS
● Efficiency at 3.6V, 400mW into 8Ω Speaker 88% (typ)
● Efficiency at 3.6V, 100mW into 8Ω Speaker 80% (typ)
● Efficiency at 5V, 1W into 8Ω Speaker 86% (typ)
● Quiescent Current, 3.6V Supply 2.1mA (typ)
● Total Shutdown Power Supply Current 0.01µA (typ)
● Single Supply Range 2.4V to 5.5V
● PSRR, f = 217Hz 78dB
DESCRIPTION
A low noise, filterless PWM architecture eliminates the output filter, reducing external component count, board area consumption, system cost, and simplifying design. Operating on a single 5V supply, it is capable of driving a 4Ω speaker load at a continuous average output of 2.1W with less than 1% THD+N.
