PT5305 --- 1.5W Filter-free Class D Audio Power Amplifier

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1.5W Filter-free Class D Audio Power Amplifier
 
GENERAL DESCRIPTION
 
The PT5305 is a single suppl y, high e fficiency 1.5W class D audio amplifie r. A low noise, filterless PWM architecture eliminates the output filte r, reduces external component count, board area consumption, system cost, and simplifies design.

The PT5305 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 5V suppl y, it is capable of driving an 8Ω speaker load at a continuous average output of 1.5W with less than 10% THD+N. Its flexible power supply requirements allow operation from 2.5V to 5.5 V.

The PT5305 has high e fficiency with speaker loads compared to a typical Class AB amplifie r. With a 5V supply driving an 8Ω speake r, the IC ’s e fficiency for a 100mW power level is 82%, and reaching 90% at 400mW output powe r.
 
FEATURES
 
¨          1.5W Into 8 Ω from a 5V supply at THD=10% (Typ.)

¨          High Efficiency: 90% at 400mW, 5V power supply and 8Ω speaker

¨          1.7mA Quiescent Current @ VDD=5V

¨          0.1uA Shutdown Current

¨          advanced pop & click eliminating circuitry

¨          low power shutdown mode

¨          Only Three External Components

¨          Wide Supply Voltage (2.5V to 5.5V)

¨          Space Saving Packages 3mm* 3mm QFN package and 8-pin MSOP package
 
APPLICATION
 
¨          Cell Phones

¨          Handheld Computers and PDAs

¨          Portable electronic devices
 
TYPICAL APPLICATIONS