IC version of UCD

[witali]

Amp constructed: comparator LM319D, level shift BC546, Bc556, invertor CD4070, driver IR2110, MOSFET IRF540Z
Amp work, very good

 

[witali]

Foto

 

[TOINO]

Hi Witali

Very nice work!!
Could you post the schematic?

 

[anant_narayan]

Hi Witali,

I think the Amp is similar to IRAUDAMP1. Attached is a similar schematic.

Anantha

 

[anant_narayan]

I think the schematic i have posted is for IRAUDAMP, But after tracing the traces i found that your schematic closely follows what i have done as IC UCD. But you can avoid the level shifter 4070. Why is that needed ?, The transistors can do the job as in my circuit.

 

[anant_narayan]

Seems to be issue with using LT1016

Seems to be issue with using LT1016, lot of ringing at the edges, May be too fast for this application. 10ns !, need to look at comparators that are around 40 - 80 ns. Do any one faced this issue ?.

Planning to replace it with LM360 or LM319 + Transistors.

 

[witali]

I did not draw scheme, she in head only

 

[anant_narayan]

I have attached the schematic that may be very similar to the board layout. The simulation gave good results.

 

[witali]

À for what on IC? Transistors better, more cheaply. I compared, If do on IC still better will if do on comp. LM319, level sifter, driver IRS20124
This is my opinion...
My english bad...sorry

 

[anant_narayan]

LM319+Transistors can be used till the level shifting stage and the gate drivers can be best built with the IR parts.

 

[rinox]

Dear Witali,
in this forum we all sharing our ideas and works, if you don' t want to share anything with others, simply don' t post anything !

 

[anant_narayan]

New schematic

I modified the schematic to use LM319 as comparator and new level shifters. Hissing is gone and the sound is so GOOD! Will soon post the schematic

 

[anant_narayan]

The new schematic

Schematic with LM319 + IR2110

 

[anant_narayan]

The Amplifier delivers 120WRMS

Tesed with audio input and output power to be >120WRMS

 

[sagarverma]

the schematic cannot be interpretted.
its too low resolution.

Sagar

 

[anant_narayan]

Hi-Res Schematic and enhancement

I am working on modifying the out put stage to deliver 250W RMS, i can even expand it further to about 500W, but i don't have a suitable load to test, and use the woofers neighbours will be at my door

I will soon post the hi resolution schematics and the PCB layout for this amplifier

 

[anant_narayan]

Hi Res Schematic

Attaching a hi-res schematic

 

[Baldin]

Congratulation

The comperator A1 in your schematic, is that the LM319 you are talking about a few posts back? How is it configured?

Guess the schematic is not entirely as build.

What output mos are you using ... can't read it of your schematic picture.

What modifications are you planning, for raising the output capability to 250-500 W?

Have you done any measurements on the amp (distortion etc.)?

looks really promising

Looking forward to hearing about your further research/trails
Thumbs up

 

[anant_narayan]

Schematics and components

Yes, the schematic is not matching completely with the built unit as in the photo because i drew the schematic using LTSpice where there is no model for LM319N( LT / Philips) and IRF540Z( Not IRF540N ). LM319N should be used in place of the op amp shown. The inverter should be replaced by HCT4069 or HCF4070/HCF4030.2200uf capacitors should be added close to the mosfet leads that is not shown in the schematic. I didn't get MURS120 so i used BYV27-200. The transistors in the level shifters are BC547 and BC556.The regulator transistor is MJE13007.

 

[Ouroboros]

There may be advantages to using an LM5104 instead of the IR2110 for low/medium power applications (less than +/- 50V supplies). Using this would remove the inverting/non-inverting buffer stage that you have at the input to the IR2110.