TPA711 - 具有单声道耳机驱动的单声道 AB 类音频放大器

TPA711是TI德州仪器公司的一款扬声器放大器（AB类/D类）产品，TPA711是具有单声道耳机驱动的单声道 AB 类音频放大器，本站介绍了TPA711的封装应用图解、特点和优点、功能等，并给出了与TPA711相关的TI元器件型号供参考。

TPA711 - 具有单声道耳机驱动的单声道 AB 类音频放大器 - 扬声器放大器（AB类/D类） - 低功耗放大器 - 德州仪器

产品描述

The TPA711 is a bridge-tied load (BTL) or single-ended (SE) audio power amplifier developed especially for low-voltage applications where internal speakers and external earphone operation are required. Operating with a 3.3-V supply, the TPA711 can deliver 250-mW of continuous power into a BTL 8- 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. A unique feature of the TPA711 is that it allows the amplifier to switch from BTL to SE on the fly when an earphone drive is required. This eliminates complicated mechanical switching or auxiliary devices just to drive the external load. This device features a shutdown mode for power-sensitive applications with special depop circuitry to eliminate speaker noise when exiting shutdown mode. The TPA711 is available in an 8-pin SOIC and the surface-mount PowerPAD MSOP package, which reduces board space by 50% and height by 40%.

产品特性

Fully Specified for 3.3-V and 5-V Operation
Wide Power Supply Compatibility 2.5 V – 5.5 V
Output Power
- 700 mW at VDD = 5 V, BTL, RL = 8
- 85 mW at VDD = 5 V, SE, RL = 32
- 250 mW at VDD = 3.3 V, BTL, RL = 8
- 37 mW at VDD = 3.3 V, SE, RL = 32
Shutdown Control
- IDD = 7 uA at 3.3 V
- IDD = 50 uA at 5 V
BTL to SE Mode Control
Integrated Depop Circuitry
Thermal and Short-Circuit Protection
Surface-Mount Packaging
- SOIC
- PowerPAD™ MSOP

PowerPAD is a trademark of Texas Instruments.

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