LM4875 - 具有 DC 音量控制和耳机开关的 750mW 音频功率放大器

LM4875是TI德州仪器公司的一款扬声器放大器（AB类/D类）产品，LM4875是具有 DC 音量控制和耳机开关的 750mW 音频功率放大器，本站介绍了LM4875的封装应用图解、特点和优点、功能等，并给出了与LM4875相关的TI元器件型号供参考。

LM4875 - 具有 DC 音量控制和耳机开关的 750mW 音频功率放大器 - 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 LM4875 is a mono bridged audio power amplifier with DC voltage volume control. The LM4875 is capable of delivering 750mW of continuous average power into an 8? load with less than 1% THD when powered by a 5V power supply. Switching between bridged speaker mode and headphone (single ended) mode is accomplished using the headphone sense pin. To conserve power in portable applications, the LM4875's micropower shutdown mode (IQ = 0.7µA, typ) is activated when less than 300mV is applied to the DC Vol/SD pin.

Boomer audio power amplifiers are designed specifically to provide high power audio output while maintaining high fidelity. They require few external components and operate on low supply voltages.

产品特性

Precision DC Voltage Volume Control
Headphone Amplifier Mode
“Click and Pop” Suppression
Shutdown Control When Volume Control Pin Is Low
Thermal Shutdown Protection

Key Specifications

PO at 1.0% THD+N Into 8?; 750 mW (typ)
PO at 10% THD+N Into 8?; 1 W (typ)
Shutdown Current; 0.7µA(typ)
Supply Voltage Range; 2.7V to 5.5 V

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