Class D Audio Amplifiers

[duch]

Thanks cristi.
I ll take no risk, your sofstart seems to be fine...

[Ryssen]

Hello Cristi.
I just ordered a IRS2092 Modular Amplifier the 600w verison,and Iḿ going to use +- 71-72v
Does the amp need to be modded to fit the voltage?
Didńt think it would when I ordered..don know if you sent it yet.

[Cristi]

At +-70 to +-75V you will get less than 600W, roughly 450-500W. I will set the undervoltage threshold at about +-65V to allow you to supply the amplifier module with reduced voltage.

[Ryssen]

Ok,thanks.

[Kjeldsen]

Hi Cristi,

I just got some new heatsinks for my 8950th modules, so I can start all over again. I will implement the cap from mute to gnd to avoid the strange noise.

Is it fine to use the heatsink as gnd, ot is it better to find it on the PCB. I would rather not solder on the PCB since my solder iron is not suitable for smd soldering.

Kind regards
Brian

[Cristi]

Brian, connect the GND's on the boards rather than heatsinks, since the heatsink to board contact might not be perfect. No need to solder on the pcb, just use the existing connectors. The caps connected across Mute and GND should be ~100uF to keep the TDA89xx in mute mode till the transient is gone. Make sure the IC pad is isolated from the heatsink because is connected to V- not GND.

[Ryssen]

What is the input sensitivity on this module?

[Shatronics]

I'll hope this is the right place for my question:

I have a TDA8950SMPS and I would like to know what the expected output would be to bridge it to a 16 ohm load?
According to datasheet for the TDA8950 it would be 150W @ 0,5 % THD and 200W @ 10 % THD. Is that also applicable for the module I got?

Regards,

Simon H.A.

[Cristi]

Cxd400 400W 4R or 220W 8R amplifier module: Connexelectronic

[Shatronics]

I have to drive two bass speakers (2 x 8 ohm) and a TDA8950SMPS. I can either run them BTL @ 16 ohm or 2 x 8 ohm. They should both give the same power, so what setup is best (efficiency, THD etc.)

Regards,

Simon H.A.