Ultra Simple Class D

[CSandrelli]

LT1058 no latch-up

 

[Hlaford]

Yes, and in a spec. sheet on a page 9 it even shows how latching with a phase reversal looks like using LF412A as an example.
https://www.analog.com/media/en/technical-documentation/data-sheets/10578fd.pdf

Thanks

 

[CSandrelli]

With any op-amp the frequency response will always be much lower than 20KHz, unless you connect the feedback AFTER the coil ...

 

[sweetperfume]

Hi dear.
Please make 5kw ampl.and share to us.these are very tiny ampl..Thank you

You just want to copy paste it?

 

[refelx]

how about this tiny

😉😉😉

 

[refelx]

how about this tiny 3d

😉😉😉

 

[stewin]

looks nice , please replace all 220ohms resistors with 1/2 watts ones . the 0805 or 0603 smd package will fail.

 

[refelx]

I will install MOSFETs like this

 

[stewin]

what is the third transitor and the dip 8pin ic for?

 

[refelx]

That design is for irs2092 I m talking about MOSFETs fitment

 

[sweetperfume]

I made some of these but had issue with bd139/140 heating badly. Sounded quite nice but that heating issue never solved. Is there any remedy for that?

 

[stewin]

use bc327 and bc337 instead of bd , check my previous schematic

 

[refelx]

Which page can u please send #number

 

[doityourselfamp]

use bc327 and bc337 instead of bd , check my previous schematic

hi mr stewin
any thing new about out short protection?
thank you

 

[refelx]

you mean #139 this page

you mean #139 this page

 

[CSandrelli]

the drivers you need is very fast to increase the carrier frequency and decrease the heating

 

[stewin]

you mean #139 this page

no sir

use as per schematic on post #591

Ultra Simple Class D

hi mr stewin
any thing new about out short protection?
thank you

not yet sir , but any one with a good working overcurrent protect schematic . please post

 

[sweetperfume]

use bc327 and bc337 instead of bd , check my previous schematic

Will the heat problem get resolved by using 327/337?

 

[stewin]

yes if you use it as i have posted in my schematic at post #591 . i have used up to +/-49volts without any driver heating issues

 

[sweetperfume]

Ok thank you for the driver ossue clarification. It works as you suggested. Also i did a load testing at 45 volts. 225khz freq. Output fets went above 75deg celcius in 2-3mins and output was max 156watts per channel. What would be the problem? Load was 4.3ohms