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February 23, 2024, 08:20:37 AM

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LA4282 in BTL bridge mode?

Started by Maddus, February 15, 2024, 03:10:24 AM

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Maddus

I was given a LA4282 from my fathers workshop (he repaired lots of TVs in the 90s).
To use this for my guitar projects, I would like to know if I can bridge this like a LA4440 for example, and what external circuitry is needed.
The LA4282 already has input and feedback resistors for a gain of 101 integrated.


Datasheets:

LA4282:
https://www.mouser.de/datasheet/2/308/1/LA4282_D-2314539.pdf

LA4440:
https://www.electroschematics.com/wp-content/uploads/2012/07/la4440-datasheet.pdf

phatt

I guess one could mix concrete with a food blender but there are better ways.
Bridging small chip amps is counter productive,
If you want more power ,,Get a bigger Chip that is designed for higher power,
LM3886 are cheap.
Phil.

joecool85

Quote from: Maddus on February 15, 2024, 03:10:24 AMI was given a LA4282 from my fathers workshop (he repaired lots of TVs in the 90s).
To use this for my guitar projects, I would like to know if I can bridge this like a LA4440 for example, and what external circuitry is needed.
The LA4282 already has input and feedback resistors for a gain of 101 integrated.


Datasheets:

LA4282:
https://www.mouser.de/datasheet/2/308/1/LA4282_D-2314539.pdf

LA4440:
https://www.electroschematics.com/wp-content/uploads/2012/07/la4440-datasheet.pdf

You can actually get a LOT of volume out of 10 watts.  I would consider using the chip as-is and hook it up to a quality 12" guitar speaker.
Life is what you make it.
Still rockin' the Dean Markley K-20X
thatraymond.com

Loudthud

The LA4282 has a max load of 8 Ohms per channel so you'd have to use a 16 Ohm load in bridge mode. If you want something louder than 10W, use both channels each driving it's own speaker.