Integrated Circuits (ICs)

LM4946SQX/NOPB

Obsolete

Texas Instruments

AUDIO AMP HEADPHONE/SPEAKER 1-CH MONO/2-CH STEREO 1.3W CLASS-AB 24-PIN WQFN EP T/R

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Integrated Circuits (ICs)

LM4946SQX/NOPB

Obsolete

Texas Instruments

AUDIO AMP HEADPHONE/SPEAKER 1-CH MONO/2-CH STEREO 1.3W CLASS-AB 24-PIN WQFN EP T/R

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	LM4946SQX/NOPB

Features	Volume Control, Shutdown, SPI, Depop, Mute, I2C, 3D, Thermal Protection
Max Output Power x Channels @ Load	1.3 W, 85 mW
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	1-Channel (Mono) with Stereo Headphones
Package / Case	24-WFQFN Exposed Pad
Supplier Device Package	24-WQFN (4x4)
Type	Class D
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.7 V

LM4946 Series

540-mW, mono, 35-mW stereo, analog input Class-AB audio amplifier with I2C interface

Part	Features	Mounting Type	Supplier Device Package	Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Max Output Power x Channels @ Load	Output Type	Package / Case	Operating Temperature [Max]	Operating Temperature [Min]
Texas Instruments LM4946SQ/NOPB	3D Depop I2C Mute Shutdown SPI Thermal Protection Volume Control	Surface Mount	24-WQFN (4x4)	Class D	2.7 V	5.5 V	1.3 W 85 mW	1-Channel (Mono) with Stereo Headphones	24-WFQFN Exposed Pad	85 °C	-40 °C
Texas Instruments LM4946SQX/NOPB	3D Depop I2C Mute Shutdown SPI Thermal Protection Volume Control	Surface Mount	24-WQFN (4x4)	Class D	2.7 V	5.5 V	1.3 W 85 mW	1-Channel (Mono) with Stereo Headphones	24-WFQFN Exposed Pad	85 °C	-40 °C

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Description

General part information

LM4946 Series

The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply.

The LM4946 has three input channels: one pair for a two-channel stereo signal and the third for a differential single-channel mono input. The LM4946 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are programmed through a two-wire I2C or a three-wire SPI compatible interface that allows flexibility in routing and mixing audio channels.

The LM4946 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components in the OCL mode (two additional components in SE mode).

Documents

Technical documentation and resources

No documents available