TPA321

(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

The TPA321 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications here internal speakers are required. Operating with a 3.3-V supply, the TPA321 can deliver 250 mW of ontinuous power into a BTL 8- load at less than 1% THD+N throughout voice band frequencies. Although this evice is characterized out to 20 kHz, its operation was optimized for narrower band applications such as cellular ommunications. The BTL configuration eliminates the need for external coupling capacitors on the output in ost applications, which is particularly important for small battery-powered equipment. This TPA321 features a hutdown mode for power-sensitive applications with a quiescent current of 0.15 A during shutdown. The PA321 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD™ MSOP, which educes board space by 50% and height by 40%.