Full m/lab SD2000 schematics

[ZED]

Hello Xtrem

Yes the resistance is low but the capacitance is high.

[Xtrem]

Have you trying to use conventional mosfets ? IRF740 , IRF9640 ??

[ZED]

SI1021R but its in a very small smd package.I used to use TP0202K but there obsolete now.

[Andrei]

Thanks ZED! And what transistors do you use p-channel instead of ZVP4105

[ZED]

Hello Andrei

Yes the signal is supposed to be there although we prefer that it wasn't,mosfets have what is called capacitance,as you may know,so the flyback voltage travels through this
capacitance and appears on the source terminal,the diode on the source will clip this signal to its forward voltage drop,because the capacitance is small the charge from the flyback voltage will also be very small.
As we source components like receive fets we like to aim for low capacitance but that comes at a cost of increased resistance,the trouble with that is we like to keep the resistance low as
well so then it becomes a bit of a juggling act,a mosfet i like to use for a receive fet is a ZVN4525G

Cheers....

[Andrei]

Hi! Question. Where does the first pulse(blue) come from, like it shouldn't be since the vn2410l transistor is closed? Here after short impuls . I use VN2410L and ZVP3310.

[ramses4040]

I'm sorry, it's incorrect

[Qiaozhi]

?ğretmen iyi ve hatasız bir pcb d?zenine sahip olan var mı?

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[ramses4040]

?ğretmen iyi ve hatasız bir pcb d?zenine sahip olan var mı?

[Anis]

please help me list the common component equations on the market to replace some of the components like


mosfet
vn2410l
zvp4105
2N7000
BS170
BUK455


transistor
BC850
ZTX688
BC857
BC368
BC369


DIODA
LM336Z2
BVY28


IC
CA3083
TLC27M7CD
LM13600
40106

Hi liekwang,
Please refer to the below link, it's for giving replacement that I'm using for transistors fets...

https://alltransistors.com/mosfet/crsearch.php?&struct=MOSFET&polarity=P&pd=0.625&uds=50&ugsth=2&id=0.175&rds=10&caps=ELine

Rgds
Anis

[liekwang]

please help me list the common component equations on the market to replace some of the components like


mosfet
vn2410l
zvp4105
2N7000
BS170
BUK455


transistor
BC850
ZTX688
BC857
BC368
BC369


DIODA
LM336Z2
BVY28


IC
CA3083
TLC27M7CD
LM13600
40106

[liekwang]

Hi liekwang! or example. For smd, discrete 1206, for LT1057. No test. there will be comments that can be corrected ) [ATTACH]53153[/ATTACH]

thank you sir did you refer from the ZED scheme as there was no mistake

[Anis]

Hi Anis! It is very interesting to see the waveforms

Hi Andrei, I broke one fet the IRF710, once I receive spares I will share all waves for each TP.
Thx
Anis

[Andrei]

Hi Anis! It is very interesting to see the waveforms

[Anis]

Hi Anis! For the capacitors. I suppose it might be so. if you are wrong correct it [ATTACH]53152[/ATTACH]

Hi Andrei, yep I m already using tantalum capacitors as mentioned.
I will do some updates and by the end of the week I will share my results.
Rgds
Anis