A Product Line of Diodes Incorporated PAM8603M 3W FILTERLESS STEREO CLASS-D AUDIO AMPLIFIER WITH DC VOLUME CONTROL Description Pin Assignments The PAM8603M is a 3W, sterero, Class-D audio amplifier with DC volume control. It offers low THD+N, allowing it to produce high- quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, which saves the system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8603M is much better than class-AB cousins. It can extend the battery life thus ideal for portable applications. The PAM8603M is available in SSOP-24 and SOP-18 packages. Features 3W Output at 10% THD with a 4 Load and 5V Power Supply Filterless, Low Quiescent Current and Low EMI Low THD+N 64-Step DC Volume Control from -75dB to +24dB Superior Low Noise Efficiency up to 89% Short Circuit Protection Thermal Shutdown Few External Components to Save the Space and Cost Pb-Free Package Applications LCD Monitors/TV Projectors Notebook Computers Portable Speakers Portable DVD Players, Game Machines Cellular Phones/Speaker Phones 1 of 14 November 2012 PAM8603M Diodes Incorporated www.diodes.com Document number: DSxxxxx Rev. 1 - 1 A Product Line of Diodes Incorporated PAM8603M Typical Applications Circuit Pin Descriptions Pin Package Name Function Name SSOP-24 SOP-18 +OUTL 1 1 Left Channel Positive Output PGNDL 2, 3 2 Left Channel Power GND -OUTL 4 3 Left Channel Negative Output PVDDL 5 4 Left Channel Power Supply MUTE 6 5 Mute Control Input (active low) VDD 7 6 Analog Power Supply INL 8 7 Left Channel Input NC 9, 12, 13, 15, 16 8 No Connection VDC 10 9 Analog reference for gain control section. VOLUME 11 10 DC volume control to set the gain of Class-D. VREF 14 11 Internal analog reference, connect a bypass capacitor from VREF to GND. INR 17 12 Right Channel Input GND 18 13 Analog Ground SHDN 19 14 Shutdown Control Input (active low) PVDDR 20 15 Right Channel Power Supply -OUTR 21 16 Right Channel Negative Output PGNDR 22, 23 17 Right Channel Power GND +OUTR 24 18 Right Channel Positive Output 2 of 14 November 2012 PAM8603M Diodes Incorporated www.diodes.com Document number: DSxxxxx Rev. 1 - 1