Hi all ,
I want to be able to build a battery charger for a UPS , that is based on SMPS technology. I dont want to use bulky old transformers..
I have looked at how Computer power supplies have been designed.. They essentially have a buck converter sort of topology..
Please tell me where to start..
My requirements are the circuit should take household 220V Ac , convert it to a suitable voltage for charging (13.8 V) @ 5-15 Amps..
It is my understanding that in the computer PSW, they rectify the 220 V AC, and turn it into DC voltage (300VDC ? ) then use high frequency transformers (the yellow ones) to step the voltage down in stages .. if someone can explain the operation of these Power supplies Id be grateful
I have good know-how of microcontrollers.. so any solution there would be a piece of cake for me..
Thanks
Umer
PS , are there any safety issues with building and using such circuits.. such as lack of isolation coz there is no transformer.. ?
I want to be able to build a battery charger for a UPS , that is based on SMPS technology. I dont want to use bulky old transformers..
I have looked at how Computer power supplies have been designed.. They essentially have a buck converter sort of topology..
Please tell me where to start..
My requirements are the circuit should take household 220V Ac , convert it to a suitable voltage for charging (13.8 V) @ 5-15 Amps..
It is my understanding that in the computer PSW, they rectify the 220 V AC, and turn it into DC voltage (300VDC ? ) then use high frequency transformers (the yellow ones) to step the voltage down in stages .. if someone can explain the operation of these Power supplies Id be grateful
I have good know-how of microcontrollers.. so any solution there would be a piece of cake for me..
Thanks
Umer
PS , are there any safety issues with building and using such circuits.. such as lack of isolation coz there is no transformer.. ?