Clipping Class D ?

[Joules]

What happens when class D clipp's? What does it sound like? as compared to, say, a class A/B ?

[SSassen]

Depends on the topology used, the Hypex UcD modules sound very much like a standard class A/B amplifier. But really, why would that be a concern? Will you be running a class-D amplifier near its maximum rating? If so, you need a more powerful one perhaps

Best regards,

Sander Sassen
http://www.hardwareanalysis.com

[phase_accurate]

This will mostly depend on the feedback topology used. Some additional soft-clipping measures can be taken as well.

If no soft-clipping tricks are used the following applies:
The least nasty (i.e. cleanest) clipping is from non-NFB topologies closely followed by first order loops with a high dominant pole freqency.
Higher order loops have the habit to "stick to the rails" when driven into clipping.

Regards

Charles

[nitrate]

Greet's

I was running my amp into clipping for a prolonged time over the new year ( celebrations and all that ). The amp is a home built self osc classD of my own design. The first thing that goes is the bass, this is followed by audiable clipping across the rest of the spectrum that sounds quite soft in comparison to A/B clipping. I would say the amp sounds like it backs down during clipping. I would not describe it as a harsh or damaging clip sound. I was rather drunk but it can't have sounded that harsh as i let it carry on like that for a large part of the early morning celebrations, i wouldn't delibratly harm my baby LOL

I can't speak for the other amps on here but i think the clipping is certaintly no worse than A/B. I gather you are worried about the amp self destructing at clip or somthing. I know i was, but after a few partys my confidence has grown and i now know it is rarther hard to damage these amps. The only time mine is destroyed nowadays is when i'm hot pluging and removing components from the breadboard.

Regards
Mad.P

P.S The amp was running 80RMS into 8R when clipping. Lasted all night!

[SSassen]

Nitrate,

i now know it is rarther hard to damage these amps.

Try short circuiting the output, your output MOSFETs and fuses will blow faster than you can blink an eye. For added effect do this at a high output rating, i.e. driving the amplifier and connected loudspeaker at considerable volume, now you will see sparks fly

Best regards,

Sander Sassen
http://www.hardwareanalysis.com

[phase_accurate]

You can even run them into clipping at quite high-frequencies for prolonged periods. Now try this with the average AB amp out there !

Regards

Charles

[Workhorse]

Hi Sander,

Please have a mercy on Mad.P's amp..donot direct him to short circuit his amp...donot rule his mind

K a n w a r

[Workhorse]

Originally posted by phase_accurate
You can even run them into clipping at quite high-frequencies for prolonged periods. Now try this with the average AB amp out there !

Regards

Charles

Dear Charles Leymann,

Nothing happened only harshness in Treble was encountered....

K a n w a r

[phase_accurate]

Hi Kanwar

How is your amp BTW ? Anything fried so far ?

Regards

Charles

[Workhorse]

Nothing Fried in the amp...but it fried a 20MFD cap connected as a shunt to check out capacitive load drivabilty...that all....

One question...In my POST filter feedback amp when no load connected..i.e. open circuit ..does the feedback automatically take cares of Q of Filter.... when no load is connected...I have cliiped the amp with open circuit and nothing happened...
amazed...

K a n w a r