LM4911是TI公司的一款耳机放大器产品，LM4911是具有可选电容耦合或 OCL 输出的立体声 40mW 低噪声耳机放大器，本页介绍了LM4911的产品说明、应用、特性等，并给出了与LM4911相关的TI元器件型号供参考。
LM4911 - 具有可选电容耦合或 OCL 输出的立体声 40mW 低噪声耳机放大器 - 耳机放大器 - 低功耗放大器 - TI公司（Texas Instruments，德州仪器）
The LM4911/LM4911Q is an stereo audio power amplifier capable of delivering 40mW per channel of continuous average power into a 16Ω load or 25mW per channel into a 32Ω load at 1% THD+N from a 3V power supply.
Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4911/LM4911Q does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. In addition, the LM4911/LM4911Q may be configured for either single-ended capacitively coupled outputs or for OCL outputs (patent pending).
The LM4911/LM4911Q features a low-power consumption shutdown mode and a power mute mode that allows for faster turn on time with less than 1mV voltage change at outputs on release. Additionally, the LM4911/LM4911Q features an internal thermal shutdown protection mechanism.
The LM4911/LM4911Q is unity gain stable and may be configured with external gain-setting resistors.
A Q-grade version is available for automotive applications. It is AEC-Q100 grade 2 qualified and packaged in a 10–pin MSOP package (LM4911QMM).
PSRR at 217Hz and 1kHz
65dB (typ)
Output Power at 1kHz with VDD = 2.4V,
1% THD+N into a 16Ω load
Output Power at 1kHz with VDD = 3V,
1% THD+N into a 16Ω load
Shutdown Current
2.0µA (max)
Output Voltage change on release from
Shutdown VDD = 2.4V, RL = 16Ω (C-Coupled)
Mute Current
100µA (max)
