Texas Instruments TPA31xxD2 Class-D Stereo Amplifiers are stereo efficient, digital amplifier power stage devices for driving speakers up to 100W/2Ω in mono. The high efficiency of TI TPA3130D2 stereo amps allows it to do 2x15W without external heat sink on a single layer PCB. TPA3118D2 can even run 2x30W/8Ω without heat sink on a dual layer PCB. If even higher power is needed, TPA3116D2 does 2x50W/4Ω with a small heat-sink attached to its top side PowerPad. All three devices share the same footprint, enabling a single PCB to be used across different power levels. The TPA31xxD2 advanced oscillator/PLL circuit employs a multiple switching frequency option to avoid AM interferences. This is achieved together with an option of Master/Slave option, making it possible to synchronize multiple devices.