The TPA2000D1 is a 2-W mono bridge-tied-load (BTL) class-D amplifier designed to drive a NC No internal connection, still requires a pad for the ball. speaker with at least 4- impedance. The NOTE: The shaded terminals are used for thermal amplifier uses TI's third generation modulation connections to the ground plane. technique, which results in improved efficiency and SNR. It also allows the device to be connected directly to the speaker without the use of the LC output filter commonly associated with class-D amplifiers (this will result in EMI which must be shielded at the system level). These features make the device ideal for use in devices where high-efficiency is needed to extend battery run time.