A Product Line of Diodes Incorporated PAM8403 FILTERLESS 3W CLASS-D STEREO AUDIO AMPLIFIER Description Pin Assignments The PAM8403 is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high-quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of Class-AB cousins. It can extend the battery life, which makes it well-suited for portable applications. The PAM8403 is available in SOP-16 package. Features 3W Output at 10% THD with a 4 Load and 5V Power Supply Filterless, Low Quiescent Current and Low EMI Low THD+N Superior Low Noise Applications Efficiency up to 90% Short Circuit Protection LCD Monitors / TV Projectors Thermal Shutdown Notebook Computers Few External Components to Save the Space and Cost Portable Speakers Pb-Free Package Portable DVD Players, Game Machines Cellular Phones/Speaker Phones Typical Applications Circuit 1 of 11 November 2012 PAM8403 Diodes Incorporated www.diodes.com Document number: DSxxxxx Rev. 1 - 4 A Product Line of Diodes Incorporated PAM8403 Pin Descriptions Pin Pin Function Number Name 1 +OUT L Left Channel Positive Output 2 PGND Power GND 3 -OUT L Left Channel Negative Output 4 PVDD Power VDD 5 MUTE Mute Control Input (active low) 6 VDD Analog VDD 7 INL Left Channel Input 8 VREF Internal analog reference, connect a bypass capacitor from VREF to GND. 9 NC No Connact 10 INR Right Channel Input 11 GND Analog GND 12 SHND Shutdown Control Input (active low) 13 PVDD Power VDD 14 -OUT R Right Channel Negative Output 15 PGND Power GND 16 +OUT R Right Channel Positive Output Functional Block Diagram 2 of 11 November 2012 PAM8403 Diodes Incorporated www.diodes.com Document number: DSxxxxx Rev. 1 - 4