Specification	LM4670ITL/NOPB

Features	Short-Circuit and Thermal Protection, Differential Inputs, Depop, Shutdown
Max Output Power x Channels @ Load	3 W
Max Output Power x Channels @ Load [custom]	1
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	1-Channel (Mono)
Package / Case	DSBGA, 9-WFBGA
Supplier Device Package	9-DSBGA (1.6x1.6)
Type	Class D
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.4 V

LM4670 Series

Part	Output Type	Mounting Type	Supplier Device Package	Package / Case	Max Output Power x Channels @ Load [custom]	Max Output Power x Channels @ Load	Voltage - Supply [Min]	Voltage - Supply [Max]	Features	Operating Temperature [Max]	Operating Temperature [Min]	Type
Texas Instruments LM4670SD/NOPB	1-Channel (Mono)	Surface Mount	8-WSON (3x3)	8-WFDFN Exposed Pad	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	Class D
Texas Instruments LM4670SDX/NOPB	1-Channel (Mono)	Surface Mount	8-WSON (3x3)	8-WFDFN Exposed Pad	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	Class D
Texas Instruments LM4670ITLX/NOPB	1-Channel (Mono)	Surface Mount	9-DSBGA	9-WFBGA DSBGA	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	Class D
Texas Instruments LM4670SD	1-Channel (Mono)	Surface Mount	8-WSON (3x3)	8-WFDFN Exposed Pad	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	Class D
Texas Instruments LM4670ITLX	1-Channel (Mono)	Surface Mount	9-DSBGA	9-WFBGA DSBGA	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	Class D
Texas Instruments LM4670ITL	1-Channel (Mono)	Surface Mount	9-DSBGA	9-WFBGA DSBGA	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	Class D
Texas Instruments LM4670ITL/NOPB	1-Channel (Mono)	Surface Mount	9-DSBGA (1.6x1.6)	9-WFBGA DSBGA	1	3 W	2.4 V	5.5 V	Depop Differential Inputs Short-Circuit and Thermal Protection Shutdown	85 °C	-40 °C	Class D

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	$ 1.52
		10	$ 1.37
		25	$ 1.29
		100	$ 1.10
	Digi-Reel®	1	$ 1.52
		10	$ 1.37
		25	$ 1.29
		100	$ 1.10
	Tape & Reel (TR)	250	$ 0.68
		500	$ 0.60
		1250	$ 0.56
Texas Instruments	SMALL T&R	1	$ 1.39
		100	$ 1.07
		250	$ 0.79
		1000	$ 0.56

Description

General part information

LM4670 Series

The LM4670 is a fully integrated single-supply high efficiency switching audio amplifier. It features an innovative modulator that eliminates the LC output filter used with typical switching amplifiers. Eliminating the output filter reduces external component count, simplifies circuit design, and reduces board area. The LM4670 processes analog inputs with a delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

The LM4670 is designed to meet the demands of mobile phones and other portable communication devices. Operating on a single 5V supply, it is capable of driving a 4Ω speaker load at a continuous average output of 2.3W with less than 1% THD+N. Its flexible power supply requirements allow operation from 2.4V to 5.5V.

The LM4670 has high efficiency with speaker loads compared to a typical Class AB amplifier. With a 3.6V supply driving an 8Ω speaker, the IC's efficiency for a 100mW power level is 77%, reaching 88% at 600mW output power.

Documents

Technical documentation and resources

LM4670 Filterless High Efficiency 3W Switching Audio Amplifier datasheet (Rev. C)

Data sheet