I murdered my ICEpower module -- AGAIN!

[roberto]

http://www.audiodesignguide.com/ClassD/ ... _r_0_4.pdf

The enable pin remains low even when you switch off the mute? What about undervoltage and overcurrent ones?
They are all pulled up by a 10 kOhm resistor based on the datasheet, so no need to pull them down with a resistor.

[roberto]

I know I've burned up an arduino because I didn't have a pulldown resistor, I think some later versions of the arduino have them built into the chip, but it's not always the case.

Yes, now they have them, no worries to directly ground them.

[xtian]

Well, poop. What destroyed two modules then? There are very few variables.

I described the situation to parts-express.com support. I will report their answer.

[drew]

You might try searching and/or posting in:

https://www.diyaudio.com/forums/class-d/

[roberto]

There are some already reported issues with two resistors setting the limits for overvoltage, that in some lots are not correct and block the amp even if it is running at proper voltages.
That could be the case.

[TUBEDUDE]

If it had tubes in it it would be more bullet resistant.

[pompeiisneaks]

You might try searching and/or posting in:

https://www.diyaudio.com/forums/class-d/

I'd be hesitant to... I burned up a class d board I was building and the bulk of the responses were along the lines of "Don't do that it won't work, why did you think using a tube layout would work on a class D amp" or "Class D is hard you shouldn't do it that way" or other forms of how bad my idea was but none about why or how, just telling me I was dumb.

no actual information or help, just telling me I was wrong and didn't have a chance of success.

After I asked repeatedly for help, and explained how I didn't really feel the answers did more than scare me away from wanting to learn, the next day I finally had a couple people start giving useful responses, but I don't feel like being told I'm an idiot is a beneficial way to learn.

~Phil

[bal704]

I was thinking about using one of these ICE modules in a build...you're scaring me with these stories!

[xtian]

I'm exchanging emails with tech at parts-express, but so far he's like, "huh! let me ask around!"

The only connection I had to my chassis was earth ground from the AC wall service. All circuit grounds are independent of the chassis; my input and output jacks are isolated from the chassis. I can't imagine how I bricked two modules within seconds of power up. But the only added variable was grounding the Enable pin.

[bal704]

That's what scares me...I looked at the spec sheet and connections, and it looks like a pretty straight forward install. But an experienced builder has bricked two of them.

[TUBEDUDE]

Fragile newfangled technology. The vacuum is strong. Resistance is futile,or the inverse of conductance, no, futile.

[roberto]

Every technology has its own strong and weak points.
Class D needs to read long databases and get experience from who has already been there.
This is exactly what we do here with tubes.

I've fried a Tripath 400W module around 20 years ago.
It was needed to give a voltage on a pin and it was written at page x of 120 pages of datasheet.
Same would happen in a tube amp without giving a bias reference to output tubes.

xtian, have you measured the other two pins as I told you?

[xtian]

xtian, have you measured the other two pins as I told you?

No, because my two ICEpower modules are bricked now.