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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
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TI产品 - LM4911介绍

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

LM4911是TI德州仪器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，本站介绍了LM4911的封装应用图解、特点和优点、功能等，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 - 德州仪器

产品描述

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).

Key Specifications

PSRR at 217Hz and 1kHz

65dB (typ)

Output Power at 1kHz with VDD = 2.4V,

1% THD+N into a 16Ω load

25mW (typ)

Output Power at 1kHz with VDD = 3V,

1% THD+N into a 16Ω load

40mW (typ)

Shutdown Current

2.0µA (max)

Output Voltage change on release from

Shutdown VDD = 2.4V, RL = 16Ω (C-Coupled)

1mV (max)

Mute Current

100µA (max)

产品特性

  • OCL or capacitively coupled outputs (patent pending)
  • External gain-setting capability
  • Available in space-saving MSOP and LD packages
  • Ultra low current shutdown mode
  • Mute mode allows fast turn-on (1ms) with less than 1mV change on outputs
  • 2V - 5.5V operation
  • Ultra low noise
  • LM4911QMM is an Automotive Grade product that is AE-Q100 grade 2 qualified.

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