TPA2008D2PWP

3 -W立体声D类音频功率放大器采用直流音量控制放大器 3-W STEREO CLASS-D AUDIO POWER AMPLIFIER WITH DC VOLUME CONTROL

DESCRIPON

The TPA2008D2 is a third generation 5-V class-D amplifier from Texas Instruments. Improvements to previous generation devices include: dc volume control, lower supply current, lower noise floor, higher efficiency, smaller packaging, and fewer external components. Most notably, a new filter-free class-D modulation technique allows the TPA2008D2 to directly drive the speakers, without needing a low-pass output filter consisting of two inductors and three capacitors per channel. Eliminating this output filter saves approximately 30% in system cost and 75% in PCB area.

The improvements and functionality make this device ideal for LCD projectors, LCD monitors, powered speakers, and other applications that demand more battery life, reduced board space, and functionality that surpasses currently available class-D devices.

FEATURES

• 3 W Per Channel into 3-Ω Speakers THD+N=10%

   – < 0.045% THD at 1.5 W, 1 kHz, 3-Ω Load

• DC Volume Control With 2-dB Steps From

   -38dB to 20 dB

• Filter Free Modulation Scheme Operates Without a Large and Expensive LC Output Filter

• Extremely Efficient Third Generation 5-V Class-D Technology

   – Low Supply Current, 7 mA

   – Low Shutdown Control, 1 µA

   – Low Noise Floor, -80 dBV

   – Maximum Efficiency into 3 Ω, 78%

   – Maximum Efficiency into 8 Ω, 88%

   – PSRR, -70 dB

• Integrated Depop Circuitry

• Operating Temperature Range, -40°C to 85°C

• Space-Saving, Surface Mount PowerPAD™ Package

APPLICATIONS

• LCD Projectors

• LCD Monitors

• Powered Speakers

• Battery Operated and Space Constrained Systems