The TPA3112D1 is a 25-W efficient, Class-D audio power amplifier for driving a bridge tied speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead filters at the outputs while meeting EMC requirements. SpeakerGuard speaker protection system includes an adjustable power limiter and a DC detection circuit. The adjustable power limiter allows the user to set a voltage rail lower than the chip supply to limit the amount of current through the speaker. The DC detect circuit measures the frequency and amplitude of the PWM signal and shuts off the output stage if the input capacitors are damaged or shorts exist on the inputs.

The TPA3112D1 can drive a mono speaker as low as 4Ω. The high efficiency of the TPA3112D1, > 90%, eliminates the need for an external heat sink when playing music.

The outputs are fully protected against shorts to GND, V_CC, and output-to-output. The short-circuit protection and thermal protection includes an auto-recovery feature.

• 25-W into an 8-Ω Load at < 0.1% THD+N From a 24-V Supply
• 20-W into an 4-Ω Load at 10% THD+N From a 12-V Supply
• 94% Efficient Class-D Operation into 8-Ω Load Eliminates Need for Heat Sinks
• Wide Supply Voltage Range Allows Operation from 8 to 26 V
• Filter-Free Operation
• SpeakerGuard? Speaker Protection Includes Adjustable Power Limiter plus DC Protection
• Flow Through Pin Out Facilitates Easy Board Layout
• Robust Pin-to-Pin Short Circuit Protection and Thermal Protection with Auto-Recovery Option
• Excellent THD+N/ Pop Free Performance
• Four Selectable, Fixed Gain Settings
• Differential Inputs

• Audio input type
• Analog Input
• Architecture
• Class-D
• Speaker channels (Max)
• Mono
• Power stage supply (Max) (V)
• 26
• Power stage supply (Min) (V)
• 8
• Load (Min) (ohms)
• 4
• Output power (W)
• 25
• SNR (dB)
• 102
• THD + N @ 1 kHz (%)
• 0.05
• Iq (Typ) (mA)
• 10
• Control interface
• Hardware
• Closed/open loop
• Closed
• Analog supply (Min) (V)
• 8
• Analog supply (Max) (V)
• 26
• PSRR (dB)
• 70
• Operating temperature range (C)
• -40 to 85

TPA3112D1的完整型号有：TPA3112D1PWP、TPA3112D1PWPR，以下是这些产品的关键参数及官网采购报价：

TPA3112D1PWP，工作温度：-40 to 85，封装：HTSSOP (PWP)-28，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网TPA3112D1PWP的批量USD价格：1.055（1000+）

TPA3112D1PWPR，工作温度：-40 to 85，封装：HTSSOP (PWP)-28，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：NIPDAU，TI官网TPA3112D1PWPR的批量USD价格：.879（1000+）

TPA3112D1EVM — TPA3112D1 评估模块

TPA3112D1 评估模块包含一个 25W D 类单声道音频功率放大器和安装在电路板上的少量外部组件，它可用于直接驱动扬声器，这是借助用作输入的外部模拟音频源实现的。该 EVM 的默认输出滤波器配置是 LC 滤波器，但是也可轻松地配置为支持无滤波器操作。

设计人员可以使用 TPA3112D1EVM 快速评估声音质量并验证其应用的规范性。另外，TPA3112D1EVM 用户指南还包含用作参考设计的原理图、布局和物料清单。

TPA3112D1 TINA-TI Reference Design

PSpice for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence 的模拟分析引擎。PSpice for TI 可免费使用，包括业内超大的模型库之一，涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助?PSpice for TI 的设计和仿真环境及其内置的模型库，您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案，然后再进行布局和制造，可缩短产品上市时间并降低开发成本。

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