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LM4675SDBD: 2.65W @ 4Ω, 2.4 ~ 5.5V in

Summary

The LM4675 is a class D filterless BOOMER audio amplifier with ultra low EMI. TI's new spread spectrum technology has been integrated with the latest BOOMER performance characteristics in a 0.5mm pitch, micro SMD package. The LM4675 is designed for high output, low EMI and space saving applications such as mobile phones and other portable communication devices. This all new BOOMER delivers typically 2.2W / 1.3W of power output in 4 / 8 ohm load, respectively, with less than 1% distortion (THD+N) from a 5V DC power supply.

The LM4675TLBD and LM4675SDBD are evaluation boards designed for rapid user evaluation and saving customers valuable development expense with faster time to market. The evaluation boards include a measurement filter and are ready-to-use in a stand-alone approach that simply requires power and GND, input signal and an output load.

Specifications

Manufacturer Texas Instruments
Category Audio Amplifiers
Eval Board Part Number LM4675SDBD/NOPB-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Amplifier Type Class D
Number of Outputs Mono
Output Power (RMS) @ Load 2.65 W @ 4 Ω
Voltage In 2.4 ~ 5.5 V
THD+N (1kHz) @ Conditions < 0.1% @ 0.6 W (8 Ω, 3.6 V)
< 0.1% @ 1.1 W (8 Ω, 5 V)
< 0.2% @ 1 W (4 Ω, 3.6 V)
< 0.2% @ 2 W (4 Ω, 5 V)
Features Click and Pop Suppression
Filterless Output
Frequency Jitter for EMI
Short Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Efficiency @ Conditions >85%, 250 ~ 600 mW @ 8Ω, 3.6V in
>85%, 0.4 ~ 1.5 W @ 8Ω, 5V in
>83%, 250 ~ 800 mW @ 4Ω, 3.6V in
>83%, 0.45 ~ 2 W @ 4Ω, 5V in
Component Count + Extras 6 + 12
Design Author Texas Instruments
Application / Target Market Cellular Phone
Portable Devices
Standby Current [Typical] 10 nA
Quiescent Current [Typical] 2.8 mA
Quiescent Current [Maximum] 3.9 mA
Standby Current [Maximum] 1 µA
Main I.C. Base Part LM4675
Date Created By Author
Date Added To Library 2013-08

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