LM4911 Series

40-mW, stereo headphone amplifier with selectable capacitive coupled or OCL output

Catalog

40-mW, stereo headphone amplifier with selectable capacitive coupled or OCL output

Part	Features	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Output Type	Type	Max Output Power x Channels @ Load	Max Output Power x Channels @ Load [custom]	Max Output Power x Channels @ Load [x]	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [x]	Package / Case [x]
Texas Instruments LM4911LD/NOPB	Mute Shutdown Thermal Protection	5.5 V	2 V	Surface Mount	Headphones 2-Channel (Stereo)	Class AB	16 Ohm	2	145 mW	10-WSON (3x3)	85 °C	-40 °C	10-WFDFN Exposed Pad
Texas Instruments LM4911MM/NOPB	Mute Shutdown Thermal Protection	5.5 V	2 V	Surface Mount	Headphones 2-Channel (Stereo)	Class AB	16 Ohm	2	145 mW	10-VSSOP	85 °C	-40 °C	10-MSOP 10-TFSOP	3 mm	0.118 in
Texas Instruments LM4911MM	Mute Shutdown Thermal Protection	5.5 V	2 V	Surface Mount	Headphones 2-Channel (Stereo)	Class AB	16 Ohm	2	145 mW	10-VSSOP	85 °C	-40 °C	10-MSOP 10-TFSOP	3 mm	0.118 in
Texas Instruments LM4911LDX	Mute Shutdown Thermal Protection	5.5 V	2 V	Surface Mount	Headphones 2-Channel (Stereo)	Class AB	16 Ohm	2	145 mW	10-WSON (3x3)	85 °C	-40 °C	10-WFDFN Exposed Pad

Catalog

40-mW, stereo headphone amplifier with selectable capacitive coupled or OCL output

Key Features

• OCL or capacitively coupled outputs (patent pending)External gain-setting capabilityAvailable in space-saving MSOP and LD packagesUltra low current shutdown modeMute mode allows fast turn-on (1ms) with less than 1mV change on outputs2V - 5.5V operationUltra low noiseLM4911QMM is an Automotive Grade product that is AE-Q100 grade 2 qualified.OCL or capacitively coupled outputs (patent pending)External gain-setting capabilityAvailable in space-saving MSOP and LD packagesUltra low current shutdown modeMute mode allows fast turn-on (1ms) with less than 1mV change on outputs2V - 5.5V operationUltra low noiseLM4911QMM is an Automotive Grade product that is AE-Q100 grade 2 qualified.

Description

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 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) 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 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)