具有差动输入700毫瓦MONO低压音频功率放大器 700-mW MONO LOW-VOLTAGE AUDIO POWER AMPLIFIER WITH DIFFERENTIAL INPUTS
description
The TPA751 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 TPA751 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 1.5 nA during shutdown. The TPA751 is available in a 3.0 × 3.0 mm MicroStar Junior BGA, 8-pin SOIC surface-mount package and a surface-mount PowerPAD™ MSOP.
• Fully Specified for 3.3-V and 5-V Operation
• Wide Power Supply Compatibility 2.5 V − 5.5 V
• Power Supply Rejection at 217 Hz
− 84 dB at VDD = 5 V
− 81 dB at VDD = 3.3 V
• Output Power for RL = 8 Ω
− 700 mW at VDD = 5 V
− 250 mW at VDD = 3.3 V
• Ultralow Supply Current in Shutdown
Mode . . . 1.5 nA
• Thermal and Short-Circuit Protection
• Surface-Mount Packaging
− SOIC
− PowerPAD MSOP
− MicroStar Junior BGA