RESONANCE EFFECTS FOR EVERYONE TO SHARE

[gotoluc]

Because pin 7 is the high side of the driver,

If you look at the block diagram of these drivers you will see HO pin 7 is using the bootstrap cap + diode for it to work.

Any spike getting to VS will blow the high side of the driver chip.

I dont even know if people are reading my post, I said this many times but it seems to be getting ignored. Reference design from the manufacturer doesnt mean its stable for every design, you will need to protect the components your self.

Anyway Ill keep quite for now and let you get on with it.

Hi Chris31,

I can tell you that your circuit suggestion did not go unnoticed and I even remember Groundloop asking you for additional information. The problem is also my lac of electronic knowledge as you can see since I didn't even know why pin 7 was blowing. So I have to follow Groundloop's circuit since I don't completely understand the workings of them to start implementing other peoples suggestions.

It's too late now since I have no more good IR2103 and I'm not going to order more from China since Groundloop has a new circuit now.

There is one way you could help me at this point to help me testing again is to make an H-Bridge circuit using any of these components that I have: 4013 flip flop 2ea., 4N35 OPTO Coupler 5ea., IRF640 NPN 8ea., IRF9640 PNP 10ea.

This could be one using the 4N35: http://airbug.one.free.fr/HBoard/Hbridge.html

Thanks for you help

Luc

[najman100]

@Groundloop
@gotoluc
@wattsup
@TinselKoala

Ok guys finished drilling the PCB and packed them in the envelopes and will send them today .
Ps I left the green protective layer on the pcb once you have all the components please use a  #0000 steel wool to clean the pcb before soldering .

Najman100

[gotoluc]

Excellent news Najman100,

thank you for your generosity and devotion to help us all

Luc

[Groundloop]

Luc,

I will solder the pcb from Najman100 as soon as I get it and mail it to you with A-priority air mail.
(You will also find 20 pcs of the IR2103s and 8 pcs. of the IRF840 FET-trans N-ch 500V 8A TO220 in the mail.)

That way you will have a circuit to test coils on until I get the micro controller version ready
later in January next year.

Groundloop.

[Groundloop]

@Chris31,

I have updated the drawing for Luc with you excellent solutions to the 2103 drivers problem.
I DO listen to you. You are NOT ignored. Any help we can get is needed. Thanks.

Groundloop.