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how to reduce 230V rectified DC voltage to 30V DC voltage
In mobile phone and other charges they probably use a DC-DC switching power supply to reduce the voltage.It is important is provide isolation from the AC mains for safety.yes they are. I wonder where I can find a schematic of one of those chargers
for my circuit I cant use a transformer because of space constraints.I wonder how they do this on mobile phone chargers.it reduce 230v to 5v using switching regulator. i tried but couldnt reverse engineer that circuit
And if you want to calculate the coils use this program, extremely helpful.If calculates everything, from the number of turns to the length of the wire you are gonna need ;-)http://www.dl5swb.de/html/mini_ring_core_calculator.htmA side note... You can also build your own transformer with toroids.A must note... Be careful, if you are gonna use a switching HV IC, you MUST take into consideration the frequency of the PWM...Iron cores will NOT work at frequencies above 60 ~ 70 Hz... (Maybe 100Hz but don't push it) This is due to Eddie currents. So even if your frequency is 100Hz, better use Ferrite or something else that can work there.(Ok ferrite maybe an overkill... but still... they are not expensive and you can sleep well at night )[/quotehiis it possible to use a toroid to make 50Hz transformer? If so it will be great coz i can convert 230 to 30v with toroid transformer.and can we use a ferrite toroid with 50Hz?thank you
hiis it possible to use a toroid to make 50Hz transformer? If so it will be great coz i can convert 230 to 30v with toroid transformer.
and can we use a ferrite toroid with 50Hz?thank you
PS: Common pal! put some effort to place the quotes right... I'm loosing track of what you say...
this is my final year project so it has to be superb if I want to save my second upper
My idea is to drop voltage using a switch mode and then use a lin regulator to smooth things up