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Monday, September 22, 2014

LA4440 Audio Amplifier 2x6w 1x19W

LA4440general description:

So its a very simple audio amplifier based on the LA4440 Integrated Circuits and this will take your computer’s headphone level output and amplify it to drive a pair of external speakers. This project is destinated for all that are listening to music or movies on laptops and computers or car. This circuit uses an LA4440 and some supporting components to give you much more power, while retaining a small package that you can use. The IC is a dual channel audio power amplifier, with low distortion, and a good frequency range.

Using 2 channels, the LA4440 will output 6 watts per channel, that can drive much larger speakers than a laptop can hold. When you set up a small enclosure(s), a 12V power supply, and an audio jack connection to the laptop you’ll have a nice enhancement to your laptop audio enjoyment.

LA4440 features:

Built-in 2 channels (dual) enabling use in stereo and bridge

amplifier applications.

Dual : 6W×2 (typ.)

Bridge : 19W (typ.)

Minimun number of external parts required.

Small pop noise at the time of power supply ON/OFF and good starting balance.

Good ripple rejection : 46dB (typ.)

Good channel separation.

Small residual noise (Rg=0).

Low distortion over a wide range from low frequencies to high frequencies.

Easy to design radiator fin.

Built-in audio muting function.

Built-in protectors.

Thermal protector

Overvoltage, surge voltage protector

Pin-to-pin short protector

LA4440 specification:

LA4440 circuit diagram sterio:

LA4440 circuit diagram bridge:

LA4440 layout:

Wednesday, August 20, 2014

19W Power Amplifier based LA4440

This is the 19W power amplifier schema built based power IC LA4440. The LA4440 output configured in bridge connection. The LA4440 can be used for stereo amplifier and it will give power output of 6W on each channel. But if you use this power IC in bridge mode, the it will deliver power audio output up to 19W. Recommended supply voltage is 13.2V, 2A and heatsink should be mounted on the power IC.

Power IC LA4440 Features:

Built-in 2 channels (dual) enabling use in stereo and bridge amplifier applications.

Dual : 6W´2 (typ.)
Bridge : 19W (typ.)

Small pop noise at the time of power supply ON/OFF and good starting balance.
Minimum number of external parts required.
Good ripple rejection : 46dB (typ.)
Easy to design radiator fin.
Low distortion over a wide range from low frequencies to high frequencies.
Small residual noise (Rg=0).
Good channel separation.
Built-in protectors.
Built-in audio muting function.

Overvoltage, surge voltage protector
Thermal protector
Pin-to-pin short protector

Download the database of LA4440