Specification	LM49251TL/NOPB

Features	Depop, Volume Control, Shutdown, I2C
Max Output Power x Channels @ Load	20 mW, 1.37 W
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	2-Channel (Stereo) with Stereo Headphones
Package / Case	30-WFBGA
Supplier Device Package	30-µSMD
Supplier Device Package [x]	2.56
Supplier Device Package [y]	3.02
Type	Class G, Class D
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.7 V

LM49251 Series

1.37-W, stereo analog input Class-AB audio amplifier with 20-mW headphone amplifier

Part	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Features	Type	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package [x]	Supplier Device Package [y]	Supplier Device Package	Mounting Type	Max Output Power x Channels @ Load	Output Type
Texas Instruments LM49251TL/NOPB	85 °C	-40 °C	30-WFBGA	Depop I2C Shutdown Volume Control	Class D Class G	2.7 V	5.5 V	2.56	3.02	30-µSMD	Surface Mount	1.37 W 20 mW	2-Channel (Stereo) with Stereo Headphones
Texas Instruments LM49251TLX/NOPB	85 °C	-40 °C	30-WFBGA DSBGA	Depop I2C Shutdown Volume Control	Class D Class G	2.7 V	5.5 V			30-DSBGA	Surface Mount	1.37 W 20 mW	2-Channel (Stereo) with Stereo Headphones

Pricing

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

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 3.03
		10	$ 2.72
		25	$ 2.57
		100	$ 2.23
	Digi-Reel®	1	$ 3.03
		10	$ 2.72
		25	$ 2.57
		100	$ 2.23
	Tape & Reel (TR)	250	$ 2.12
		500	$ 1.90
		750	$ 1.63
		1250	$ 1.60
		1750	$ 1.57
		2500	$ 1.52
		6250	$ 1.46
Texas Instruments	SMALL T&R	1	$ 2.54
		100	$ 2.10
		250	$ 1.51
		1000	$ 1.13

Description

General part information

LM49251 Series

The LM49251 is a fully integrated audio subsystem designed for portable handheld applications such as cellular phones. Part of TI’s PowerWise family of products, the LM49251 utilizes a high efficiency class G headphone amplifier topology as well as a high efficiency class D loudspeaker.

The headphone amplifiers feature TI’s class G ground referenced architecture that creates a ground-referenced output with dynamic supply rails for optimum efficiency. The stereo class D speaker amplifier provides both a no-clip feature and speaker protection. The Enhanced Emission Suppression (E2S) outputs feature a patented, ultra low EMI PWM architecture that significantly reduces RF emissions.

The LM49251 features separate volume controls for the mono and stereo inputs. Mode selection, shutdown control, and volume are controlled through an I2C compatible interface.

Documents

Technical documentation and resources

Stereo Audio w/Class G Headphone Amp & Class D Speaker Amp w/Speaker Protection datasheet (Rev. A)

Data sheet