without the chip it aint, because its not the same reference, but V(b-B) is ok
edit: when the chip was on it was tho..
edit: when the chip was on it was tho..
VCC needs to be very clean too, are there any glitches on it ?
I had trouble with glitches on VCC and this would reset the 2092 all teh time.
I had trouble with glitches on VCC and this would reset the 2092 all teh time.
The 2092 should have a good chance of running then.
Time to put the 2092 back in and check the LO and HO outputs for pulses.
Check VB is a sensible voltage.
with the irs lately it was pulsing on Ho, but was stoping and was glitching or i duno, Lo was constant high state, gonn see what that does now ... keeping news up
just soldered a new irs.. when i put only ±B and Vcc, i have all power stage voltage ok, thought on the other side, i have vaa, vss, csd, IN and comp around -1V, i guess its note really normal ?
and Vaa and Vss should be connected "before" +/-Vb and Vcc, or at the same time
I have Vaa and Vss generated from main voltages, so first time, I soldered that part of circuit first, and tested that I really get my +/-5v for the IRS
IRS came on board pretty late, after all voltage were already known, like Vaa, Vss, Vcc, and main voltages... and that was with all components for that part
Tell me one thing, if LO is on, does your upper capacitor charges to Vcc - diode?
I have Vaa and Vss generated from main voltages, so first time, I soldered that part of circuit first, and tested that I really get my +/-5v for the IRS
IRS came on board pretty late, after all voltage were already known, like Vaa, Vss, Vcc, and main voltages... and that was with all components for that part
Tell me one thing, if LO is on, does your upper capacitor charges to Vcc - diode?
in application note, they say that it could dommaged the ic if vss was lower than -B, its why the diode,
tho, right now i tried it out and Vaa was at same voltage than Vss... (i put analog supply before this time) and i have LO low level with 15volt on Vb (because of the protection zener)
to let you know, audio in is floating,
tho, right now i tried it out and Vaa was at same voltage than Vss... (i put analog supply before this time) and i have LO low level with 15volt on Vb (because of the protection zener)
to let you know, audio in is floating,
but I don't see how vcc can be lower then -B, since at best, is about 12v above it
So if you have vss and vaa, and you have vcc, then you can check if dead time, over current settings are ok and if normal voltages are on other pins
then you can add +/-B, I would use limiting resistors, say 100R... with should be small enough for amp to start an even play some music, if nothing else, you will get oscilation (if some cases, dependent on all settings, you would need big audio signal to start it(if you have the problem it doesn't by itself(and nothing blows if you have all voltages on)))
So if you have vss and vaa, and you have vcc, then you can check if dead time, over current settings are ok and if normal voltages are on other pins
then you can add +/-B, I would use limiting resistors, say 100R... with should be small enough for amp to start an even play some music, if nothing else, you will get oscilation (if some cases, dependent on all settings, you would need big audio signal to start it(if you have the problem it doesn't by itself(and nothing blows if you have all voltages on)))
i put off Vaafilter resistance, i have correcte voltage on Vaa now, tho in application note its what they say to use for my type of supply, its not suppose to affect the ic.. nothing really happen right now, comp pis stay at Vss
yes i've put it too, but nothing, is it possible that the ic is blown again ? lol...
on IN- i have my audio signal with an offset of Vaa-0,5V.
on IN- i have my audio signal with an offset of Vaa-0,5V.
i dunno lol, i guest its not normal the way you say it.
i'll try another irs without filter res R[1,4]
i'll try another irs without filter res R[1,4]
I have just built up my latest 2092 pcb with seperate mosfet drivers like yours and it works a treat. You cant be too far away from getting yours working now.
- Status
- Not open for further replies.