Feb 7, 2013 #1 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 can someone help me fine tune this circuit for feedback/error correction for sg3525 pushpulll configuration. i need to get the values of the resistor right. i dont want to use a transformer in between just want to sense the voltage directly. thanks Attachments feedback.rar 13.3 KB · Views: 217
can someone help me fine tune this circuit for feedback/error correction for sg3525 pushpulll configuration. i need to get the values of the resistor right. i dont want to use a transformer in between just want to sense the voltage directly. thanks
Feb 20, 2013 #2 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 any help from anybody?
Feb 21, 2013 #3 picgak Advanced Member level 1 Joined Oct 13, 2011 Messages 407 Helped 102 Reputation 204 Reaction score 102 Trophy points 1,323 Activity points 3,177 I can help but I could not open the file you posted I extracted your file. is it a Tinycad file?
Feb 21, 2013 #4 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 thanks picgak, just downloaded it now and it did open. u can use proteus to open it. i hav converted it to pdf thanks Attachments feedback.pdf 23.5 KB · Views: 240
thanks picgak, just downloaded it now and it did open. u can use proteus to open it. i hav converted it to pdf thanks
Feb 22, 2013 #5 picgak Advanced Member level 1 Joined Oct 13, 2011 Messages 407 Helped 102 Reputation 204 Reaction score 102 Trophy points 1,323 Activity points 3,177 I have opened your circuit and made a slight change in it (see fig) so what is your required voltage at the output point which I marked as V
I have opened your circuit and made a slight change in it (see fig) so what is your required voltage at the output point which I marked as V
Feb 22, 2013 #6 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 thanks ok i want to use this as a feedback mechanism for sg3525 pwm inverter. so i wish to measure the output voltage directly (230v) thanks for your help
thanks ok i want to use this as a feedback mechanism for sg3525 pwm inverter. so i wish to measure the output voltage directly (230v) thanks for your help
Feb 23, 2013 #7 picgak Advanced Member level 1 Joined Oct 13, 2011 Messages 407 Helped 102 Reputation 204 Reaction score 102 Trophy points 1,323 Activity points 3,177 use 56k for R2 and 2.2k variable as Rv1 give 2.5v as ref to pin2 of sg3525
Feb 23, 2013 #8 pplus Full Member level 4 Joined Feb 13, 2013 Messages 206 Helped 51 Reputation 102 Reaction score 49 Trophy points 1,308 Activity points 2,202 babatundeawe said: i want to use this as a feedback mechanism for sg3525 pwm inverter. so i wish to measure the output voltage directly (230v) Click to expand... TL431 Vka - 37V (MAX) In this scheme, it will burn.
babatundeawe said: i want to use this as a feedback mechanism for sg3525 pwm inverter. so i wish to measure the output voltage directly (230v) Click to expand... TL431 Vka - 37V (MAX) In this scheme, it will burn.
Feb 23, 2013 #9 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 picgak said: use 56k for R2 and 2.2k variable as Rv1 give 2.5v as ref to pin2 of sg3525 Click to expand... ok i will give it a try and feed you back thanks
picgak said: use 56k for R2 and 2.2k variable as Rv1 give 2.5v as ref to pin2 of sg3525 Click to expand... ok i will give it a try and feed you back thanks
Feb 24, 2013 #10 pplus Full Member level 4 Joined Feb 13, 2013 Messages 206 Helped 51 Reputation 102 Reaction score 49 Trophy points 1,308 Activity points 2,202 +V1 <= Vka_max(37V)
Feb 24, 2013 #11 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 @pplus can u tell what u mean by Vka? is the cathode voltage of tl431 or that of the optocoupler? thanks
@pplus can u tell what u mean by Vka? is the cathode voltage of tl431 or that of the optocoupler? thanks
Feb 25, 2013 #12 picgak Advanced Member level 1 Joined Oct 13, 2011 Messages 407 Helped 102 Reputation 204 Reaction score 102 Trophy points 1,323 Activity points 3,177 it means maximum voltage the TL431 can withstand is 37v so +V1 marked in above circuit should not be above 37V
it means maximum voltage the TL431 can withstand is 37v so +V1 marked in above circuit should not be above 37V
Mar 1, 2013 #13 B babatundeawe Full Member level 5 Joined Apr 12, 2007 Messages 244 Helped 16 Reputation 32 Reaction score 12 Trophy points 1,298 Location Nigeria Activity points 2,738 ok guys i think ihave to order for another one cos i guess this one i have appears to be damaged due to high voltage.
ok guys i think ihave to order for another one cos i guess this one i have appears to be damaged due to high voltage.