A flyback converter high voltage supply by 555
Posted by News
The circuit diagram of the flyback converter will hold no surprises (Fig.16). Literally the only difference with the boost converter is that the inductor is replaced by a transformer, and that the transistor has been replaced for a BUZ21. The BUZ21 has a much lower on resistance (Ron=0.085 ohm) as compared to the BUZ41A (Ron=1.5 ohm) but also a lower drain-source breakdown voltage (100V versus 500V).
Read More Source:
http://www.dos4ever.com/flyback/flyback.html
Thank you.
Related posts
A flyback converter high voltage supply by 555
Posted by News
The circuit diagram of the flyback converter will hold no surprises (Fig.16). Literally the only difference with the boost converter is that the inductor is replaced by a transformer, and that the transistor has been replaced for a BUZ21. The BUZ21 has a much lower on resistance (Ron=0.085 ohm) as compared to the BUZ41A (Ron=1.5 ohm) but also a lower drain-source breakdown voltage (100V versus 500V).
Read More Source:
http://www.dos4ever.com/flyback/flyback.html
Thank you.
Related posts
Simple Class A Power Amplifier by IRF530
Posted by News
I was in need of high quality headphones amplifier because of many reasons and decided to build SDS Labs phone amp. This is extremely rewarding project in a sense that it is fully documented, includes PCB, parts list and building notes - so it’s easy to build and then it sounds great. I have used IRF530 and IRF9530 pairs and they work just fine given the fact that you add 100-300 Ohm gate resistors to prevent high frequency oscillations. This is a common problem for MOSFET designs and if you don’t have a good oscilloscope or want to be on the safe side just use gate resistors on any MOSFET design. Ferrite beads put over gate pin could also be used instead but I somehow prefer resistors.
Read More Source:
http://www.geocities.com/leobodnar/audio_amplifiers.html
Thank you.
Related posts
Simple Class A Power Amplifier by IRF530
Posted by News
I was in need of high quality headphones amplifier because of many reasons and decided to build SDS Labs phone amp. This is extremely rewarding project in a sense that it is fully documented, includes PCB, parts list and building notes - so it’s easy to build and then it sounds great. I have used IRF530 and IRF9530 pairs and they work just fine given the fact that you add 100-300 Ohm gate resistors to prevent high frequency oscillations. This is a common problem for MOSFET designs and if you don’t have a good oscilloscope or want to be on the safe side just use gate resistors on any MOSFET design. Ferrite beads put over gate pin could also be used instead but I somehow prefer resistors.
Read More Source:
http://www.geocities.com/leobodnar/audio_amplifiers.html
Thank you.
Related posts
Mini Power Amplifier 30W by TIP141 TIP146
Posted by News
Many times we needed a small power amplifier, but good quality, made from distinguishable components. The design does not have any innovation. In the power stage exist a pair of transistors Darlington in package TOP3, which can screwing on a heatsink, putting between them and in the heatsink, suitable leaves mica and silicone ointment on better temperature kidnapping. The bias current regulation becomes with the TR1, as follows. We place in terminally one from resistors R20 or their R21 multimeter binding post, in scale 200mV and we regulate late the TR1 until we take clue 12mV. This voltage dip (fall) corresponds in current 30mA. We thinly leave the amplifier in this regulation for 15 min. without signal in the input and check again. If it need we correct the regulation in 30mA.
R1=1Kohm R16-17=270ohm D1=9.1V 0.4W zener
R2=47Kohm R18=22ohm 1W D2-3=1N4148
R3=1.5Kohm R19=NC Q1-2=BC550C
R4-5=10Kohm R20-21=0.39ohm 4W Q3=MPSA56
R6=5.6Kohm TR1=250ohm trimmer Q4=BC547B
R7=10ohm C1=470nF 100V MKT Q5=BC212
R8=47Kohm C2=1nF 100V MKT Q6=BC183
R9=560ohm C3=68pF ceramic Q7-8=MPSAO6
R10-11=8.2Kohm C4-8=22nF 100V MKT Q9=TIP141
R12-15=120ohm C5-6-7=100nF 100V MKT Q10=TIP146
R13=680ohm C9=47uF 25V F1-2=1.6AT FUSE
R14=330ohm C10-11=220uF 63V All the resistors is 1/4W 1% except quote differently
Read More Source:
http://users.otenet.gr/~athsam/power_amplifier_30w.htm
Thank you.