描述 
TM3823A是一个D类音频功率放大器驱动立体声桥接式负载（BTL扬声器） 
配置。先进的EMI抑制技术可以使用廉价的铁氧体磁珠滤波器 
在输出，同时满足EMC要求。扬声器保护电路包括一个可调节 
功率限制器和一个DC检测电路。可调节的功率限制器允许用户设置一个“虚拟” 
低于芯片供给的电流的量，以限制通过扬声器电压轨。 DC检测 
电路测量的PWM信号的频率和振幅，并切断输出级，如果输入 
电容器的损坏或短裤上的投入。 TM3823A可驱动立体声扬声器低至 
4。 TM3823A，87％，的高效率时，消除了需要一个外部的散热器 
播放音乐。输出也充分的保护，防止短路到GND，VCC，输出到输出。 
短路保护和热保护功能，包括自动恢复功能。

Features
■ 10W/ch into an 8- Load at 10% THD+N from a 12V Supply
■ 87% Efficient Class-D Operation eliminates need for Heat Sinks
■ Wide Supply Voltage Range Allows Operation from 8 V to 15 V
■ Filter-Free Operation
■ Speaker Protection Includes Adjustable Power Limiter plus DC
Protection
■ Short Circuit Protection and Thermal Protection with Auto
Recovery Option
■ Excellent THD+N / Pop-Free Performance
■ Four Selectable, Fixed Gain Settings
■ Differential Inputs
Description
TM3823A is a Class-D audio power amplifier for driving stereo speakers in bridged-tied load (BTL)
configuration. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead filters
at the outputs while meeting EMC requirements. Speaker protection circuitry includes an adjustable
power limiter and a DC detection circuit. The adjustable power limiter allows the user to set a "virtual"
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 TM3823A can drive stereo speakers as low as
4 . The high efficiency of the TM3823A, 87%, eliminates the need for an external heat sink when
playing music. The outputs are also fully protected against shorts to GND, VCC, and output-to-output.
The short-circuit protection and thermal protection includes an auto-recovery feature.