TI新推基于汽车eCall的参考设计方案

车辆配备eCall系统可以使得在事故发生时，电话可以很快的到达紧急服务中心。TI推出的由AEC-Q100构成的集成电路(ic)可以提供给客户设计汽车eCall系统时一个完整的参考解决方案。

这个参考设计结合了TI的高效mono D类音频放大器TPA3111D1-Q1和TPS43330-Q1，低功耗,双通道的控制器与其他模拟和嵌入式处理组件创建一个高集成的、低成本的解决方案，并可扩展为其他汽车应用如远程信息处理、被盗车辆跟踪和混合动力汽车/电动汽车声音一代。它还包含了TLV70033-Q1调压器与低静态电流和MSP430F2232 16位超低功耗单片机。

特点：

响亮、清晰的音频质量：

The TPA3111D1-Q1 delivers 10W output power at 8Ω at greater than 90 percent efficiency and has enhanced EMI suppression technology to improve noise immunity. This ensures loud and clear audio quality; which is imperative in an eCall system where outside noise can sometimes overwhelm the emergency call.

具有应急操作系统：

The TPS43330-Q1 pre-boost circuit supports automotive start/stop and boosts backup battery supply voltage, allowing operation down to 2V at the input. Combined with the wide supply voltage (8V-26V) range of TPA3111D1-Q1, the components in this reference design can be powered off a single cell LiFePO4 battery in case the car battery connection is severed in an accident.

具有系统防护能力：

The components offered in this system provide over-voltage and load dump protection against input transients up to 40V. The Class D amplifier also offers power cycling capability and speaker open-load detection during initial power-up.