TPA2000D4DAPR

The Texas Instruments TPA2000D4DAPR is a 2-W stereo bridge-tied-load (BTL) class-D audio amplifier capable of driving speakers with impedances as low as 4 Ω. It utilizes TI's second-generation modulation technique, enhancing efficiency and signal-to-noise ratio. This technique allows for direct speaker connection without the need for an LC output filter, simplifying design and reducing component count, though system-level EMI shielding is required.

Ideal for applications like notebook PCs and USB-powered speakers, the TPA2000D4DAPR offers high efficiency to extend battery life and maximize output power without tripping USB over-current protection. It includes an integrated stereo Class-AB headphone amplifier, requiring external resistors for gain setting. The amplifier's gain is configurable via GAIN1 and GAIN0 pins, supporting gains of 5, 11, 17, and 23 dB. The device operates within a temperature range of -40°C to 85°C and comes in a space-saving, thermally-enhanced HTSSOP (DAP) package.

Key electrical characteristics include a typical supply current of 9 mA at 5 V and a shutdown current of less than 0.05 µA. The differential inputs are high-impedance CMOS, suitable for use as summing nodes. The MODE pin controls which amplifier (main or headphone) is active.