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LM4953 - Ground-Referenced Ultra Low Noise / Ceramic Speaker Driver

General Description

The LM4953 is an audio power amplifier designed for driving Ceramic Speaker in portable applications.

When powered by a 3.6V supply, it is capable of forcing 12.6Vpp across a 2µF + 30Ω bridge-tied-load (BTL) with less than 1% THD+N.

Key Features

  • a low-power consumption shutdown mode. Additionally, the LM4953 features an internal thermal shutdown protection mechanism. The LM4953 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4953 is unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Quiescent Power Supply Current (Vdd = 3V) 7mA(typ) j BTL Voltage Swing (2µF+30Ω load, 1% THD+N, Vdd = 3.6V) j Shutdown C.

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📁 Similar Datasheet

Part Number Description Manufacturer
LM4950 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier Texas Instruments
LM4951 Wide Voltage Range 1.8 Watt Audio Amplifier Texas Instruments
LM4951A Wide Voltage Range 1.8 Watt Audio Amplifier Texas Instruments
LM4952 3.1W Stereo-SE Audio Power Amplifier Texas Instruments
LM4954 High Voltage 3 Watt Audio Power Amplifier Texas Instruments

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM4950 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier
LM4951 Wide Voltage Range 1.8 Watt Audio Amplifier
LM4951A Wide Voltage Range 1.8 Watt Audio Amplifier
LM4952 3.1W Stereo-SE Audio Power Amplifier
LM4954 HIgh Voltage 3 Watt Audio Power Amplifier

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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September 2005 www.DataSheet4U.com LM4953 Ground-Referenced, Ultra Low Noise, Ceramic Speaker Driver LM4953 Ground-Referenced, Ultra Low Noise, Ceramic Speaker Driver General Description The LM4953 is an audio power amplifier designed for driving Ceramic Speaker in portable applications. When powered by a 3.6V supply, it is capable of forcing 12.6Vpp across a 2µF + 30Ω bridge-tied-load (BTL) with less than 1% THD+N. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4953 does not require bootstrap capacitors, or snubber circuits. Therefore it is ideally suited for display applications requiring high power and minimal size. The LM4953 features a low-power consumption shutdown mode.