TPA721
www.ti.com SLOS231E – NOVEMBER 1998 – REVISED JUNE 2004 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER
FEATURES DESCRIPTION Fully Specified for 3.3-V and 5-V Operation
Wide Power Supply Compatibility 2.5 V – 5.5 V
Output Power for RL = 8 Ω
– 700 mW at VDD = 5 V, BTL
– 250 mW at VDD = 3.3 V, BTL
Integrated Depop Circuitry
Thermal and Short-Circuit Protection
Surface-Mount Packaging
– SOIC
– PowerPAD™ MSOP The TPA721 is a bridge-tied load (BTL) audio power
amplifier developed especially for low-voltage applications where internal speakers are required.
Operating with a 3.3-V supply, the TPA721 can
deliver 250-mW of continuous power into a BTL 8-Ω
load at less than 0.6% THD+N throughout voice band
frequencies. Although this device is characterized out
to 20 kHz, its operation is optimized for narrower
band applications such as wireless communications.
The BTL configuration eliminates the need for external coupling capacitors on the output in most applications, which is particularly important for small
battery-powered equipment. This device features a
shutdown mode for power-sensitive applications with
a supply current of 7 ВµA during shutdown. The …
