Class-D Discrete vs Chips?

[markusA]

In the traditional amplifier world OP-amps and chips in general are often considered sort of "low end".
Now we're in the Class D forum and the rules have suddenly changed.

Which is better? To use transistors or chips?
When you buy OP-amps and readymade cirquits they are already optimised for performance, is there any reason to use the old school components beside maybe saving a $? I said maybe because the new cirquits aren't so expensive anymore.

[nigelwright7557]

For a first design I would go with a chip solution.
Chips like the irs2092 have deadtime and over current protect built in.

Once you have mastered a chip solution you will be ready for a discrete design.

[markusA]

I take it discrete cirquits are still king then?
(As long as it's designed the right way)

[Hitec]

Somehow I think IC is always better if specifications for design are good and design is well made. Anyway, I don't have any experience on comparing these two objectively. Some good reasons could be:

• Tighter layout on substrate. This translates to better EMI properties, smaller parasitic components and shorter transmission lines (digital circuits).
• Well tested as no one makes on IC before making sure it works
• Smaller footprint on PCB
• Ease of use --> may be a downside for a hobbyist

However, it is interesting to make a circuit to work with discrete components.

[dileepkella85]

For very first design IC is the best choice.........once got experienced then you can move to discrete components as your requirements change.

[studiotan]

Hello,

(i'm french)

i'm persuaded than chip is better, shorter lenght...

the discrete make a lot of loss....


oNLY BLIND TEST CAN easily answer to this questtion

bye

[marce]

High DI/Dt switching etc the technology is better with integrated designs, using discretes and especialy through hole, you are adding parasitic inductance, not good for class D.