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).

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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)

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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.

• Output power (W)
• 0.04
• Analog supply (Min) (V)
• 2
• Analog supply (Max) (V)
• 5.5
• PSRR (dB)
• 65
• Rating
• Catalog
• Operating temperature range (C)
• -40 to 85
• Headphone channels
• Stereo
• Volume control
• No
• Shutdown current (ISD) (uA)
• 0.1
• Architecture
• Class-AB
• Iq per channel (Typ) (mA)
• 1

LM4911的完整型号有：LM4911MM/NOPB，以下是这些产品的关键参数及官网采购报价：

LM4911MM/NOPB，工作温度：-40 to 85，封装：VSSOP (DGS)-10，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM4911MM/NOPB的批量USD价格：.691（1000+）

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