LM4670ITL/NOPB

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Texas Instruments

3-W, MONO, ANALOG INPUT CLASS-D AUDIO AMPLIFIER WITH EXTERNALLY CONFIGURABLE GAIN

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LM4670ITL/NOPB

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Texas Instruments

3-W, MONO, ANALOG INPUT CLASS-D AUDIO AMPLIFIER WITH EXTERNALLY CONFIGURABLE GAIN

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Description Specifications Series Pricing CAD Documents

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.

Technical Specifications

Parameters and characteristics for this part

Specification	LM4670ITL/NOPB

Channels	1
Features	Depop, Shutdown, Short-Circuit and Thermal Protection, Differential Inputs
Load Impedance	4 Ohm
Maximum Output Power (per Channel)	3 W
Mounting Type	Surface Mount
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Type	1-Channel (Mono)
Package / Case	9-WFBGA, DSBGA
Package Length	1.6 mm
Package Name	9-DSBGA
Package Width	1.6 mm
Type	Class D
Voltage - Supply (Maximum)	5.5 V
Voltage - Supply (Minimum)	2.4 V

LM4670 Series

Part	Mounting Type	Type	Package / Case	Load Impedance	Maximum Output Power (per Channel)	Channels	Features	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Supply (Minimum)	Voltage - Supply (Maximum)	Package Length	Package Name	Package Width	Output Type
Texas Instruments LM4670SD/NOPB	Surface Mount	Class D	8-WFDFN Exposed Pad	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V	3 mm	8-WSON	3 mm	1-Channel (Mono)
Texas Instruments LM4670SDX/NOPB	Surface Mount	Class D	8-WFDFN Exposed Pad	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V	3 mm	8-WSON	3 mm	1-Channel (Mono)
Texas Instruments LM4670ITLX/NOPB	Surface Mount	Class D	9-WFBGA DSBGA	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V		9-DSBGA		1-Channel (Mono)
Texas Instruments LM4670SD	Surface Mount	Class D	8-WFDFN Exposed Pad	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V	3 mm	8-WSON	3 mm	1-Channel (Mono)
Texas Instruments LM4670ITLX	Surface Mount	Class D	9-WFBGA DSBGA	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V		9-DSBGA		1-Channel (Mono)
Texas Instruments LM4670ITL	Surface Mount	Class D	9-WFBGA DSBGA	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V		9-DSBGA		1-Channel (Mono)
Texas Instruments LM4670ITL/NOPB	Surface Mount	Class D	9-WFBGA DSBGA	4 Ohm	3 W	1	Depop Differential Inputs Short-Circuit and Thermal Protection Shutdown	85 °C	-40 °C	2.4 V	5.5 V	1.6 mm	9-DSBGA	1.6 mm	1-Channel (Mono)

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

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