Texas Instruments TPA3140D2 D 类音频放大器
德州仪器 TPA3140D2 D 类音频放大器是一款高效的 D 类音频功率放大器,用于驱动功率高达 10W/6Ω 或 8Ω(每通道)的桥接立体声扬声器。该器件采用扩展频谱控制和 1SPW 调制方案的高级 EMI 抑制技术,既能实现在输出端使用成本较低的铁氧体磁珠滤波器,同时又能满足 EMC 要求,降低了系统成本。该器件能提供短路和过载保护。SpeakerGuard™ 扬声器保护电路包括一个可调节自动增益限制器(AGL)、一个可调节功率限制器以及一个直流检测电路,可以保护所连接的扬声器。 AGL 可调节最大输出电压而不造成信号削波,从而增强了扬声器保护效果,提升了音频质量。直流检测及引脚至引脚、引脚至地和引脚至电源短路保护电路可以防止扬声器在生产过程中发生输出直流和引脚短路。同时充分保护输出,防止 GND、PVCC、输出至输出短路。特性
- 2x10 W/ch into 6Ω loads at 10% THD+N from a 12V supply
- 2x10 W/ch into 8Ω loads at 10% THD+N from a 13V supply
- Up to 90% efficient Class-D operation (8Ω) eliminates need for heatsinks
- <0.05% THD+N at 1W/4Ω/1kHz
- <65µV A-wgt output noise
- 4.5V to 14.4V supply voltage range
- Inductor-free operation
- Enhanced EMI performance with spread spectrum and 1SPW operation
- SpeakerGuard speaker protection
- Robust pin-to-pin, pin-to-ground, and pin-to-power short circuit protection and thermal protection
- Four selectable, fixed gain settings
- Single ended or differential analog inputs
- Click and pop free startup
应用
- Televisions
- BT speakers
- Wireless speakers
- Mini speakers
- USB speakers
- Consumer audio equipment
Schematic
发布日期: 2015-06-29
| 更新日期: 2022-03-11
