Hello,
I'm interested in a Mono Class D amplifier PCB or populated PCB which can drive 4-16 Ohms speakers to approx. 50W with reasonable THD. This is for an instrument amplifier, so THD up to 0.1% (max.) would be acceptable and a frequency range 60Hz-18kHz would be transparent enough for the application.
I see some very cheap PCBs on eBay/AliExpress and more expensive PCB from various other companies.
But this needs to be reliable, I want something that last and won't blow-up! Any suggestions?
Designing my own is an option and would be fun, but I'm much rather use something that is already well designed and tested; why re-invent the wheel.
I'm interested in a Mono Class D amplifier PCB or populated PCB which can drive 4-16 Ohms speakers to approx. 50W with reasonable THD. This is for an instrument amplifier, so THD up to 0.1% (max.) would be acceptable and a frequency range 60Hz-18kHz would be transparent enough for the application.
I see some very cheap PCBs on eBay/AliExpress and more expensive PCB from various other companies.
But this needs to be reliable, I want something that last and won't blow-up! Any suggestions?
Designing my own is an option and would be fun, but I'm much rather use something that is already well designed and tested; why re-invent the wheel.
50 W @ 4 Ohm means 14V (rms) output -> cheap TPA31xx is happy to do this with around 22 V supply
50 W @ 16 Ohm means 28 V (rms) output -> you need a chip that allows much higher supply voltage (TPA32xx)
also keep in mind that output filters are optimized for a specific impedance. so you may have to change the filter depending on the speaker impedance.
50 W @ 16 Ohm means 28 V (rms) output -> you need a chip that allows much higher supply voltage (TPA32xx)
also keep in mind that output filters are optimized for a specific impedance. so you may have to change the filter depending on the speaker impedance.
Thanks.
I’ve been looking at the data sheet. It’s quiet helpful and would be a fun project.
I just can’t help thinking someone else has done this before, and it’s out there!
Are there any PCB suppliers that are trusted and affordable. Maybe if I over spec. the amp is will have an easier time driving those loads.
I’ve been looking at the data sheet. It’s quiet helpful and would be a fun project.
I just can’t help thinking someone else has done this before, and it’s out there!
Are there any PCB suppliers that are trusted and affordable. Maybe if I over spec. the amp is will have an easier time driving those loads.