LM4911
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
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PSRR at 217Hz and 1kHz |
65dB (typ) |
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Output Power at 1kHz with VDD = 2.4V, 1% THD+N into a 16Ω load |
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Output Power at 1kHz with VDD = 3V, 1% THD+N into a 16Ω load |
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Shutdown Current |
2.0µA (max) |
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Output Voltage change on release from Shutdown VDD = 2.4V, RL = 16Ω (C-Coupled) |
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Mute Current |
100µA (max) |
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM4911/911Q Stereo 40mW Low Noise HP Amp w/Selectable Cap Coupled or OCL Out datasheet (Rev. M) | 2011/6/8 | |||
| 應用說明 | Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) | 2019/8/26 | ||||
| 應用說明 | AN-1849 An Audio Amplifier Power Supply Design (Rev. C) | 2019/6/27 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |