papaisou11
Member level 2
Hiii...
I want to make a 12V ups system for powering up my musical gadgets.
My requirement is When the AC Voltage (230V, India) is present the 12v will be produced by a SMPS and it will provide the 12v power.
As the SMPS has an universal input voltage rating, which is 85V AC to 230V AC, if there is no AC input or the input voltage is below 85VAC, a Boost regulator which will be turned on and provide 7.4V to 12V at the output and will power up the gadgets. This switching will be done by MOSFET which will be connected across the boost regulator input pin.
I already made this circuit, but the problem is about sensing the AC line. I tried to sense the AC using diode bridge, Filter caps and opto-coupler but facing difficulties related with the 85V AC. If I want to compare the converted DC across the diode bridge using comparator, what is the best way to wiring it?
Is there any alternative way to do that?
Thanks in Advance.
I want to make a 12V ups system for powering up my musical gadgets.
My requirement is When the AC Voltage (230V, India) is present the 12v will be produced by a SMPS and it will provide the 12v power.
As the SMPS has an universal input voltage rating, which is 85V AC to 230V AC, if there is no AC input or the input voltage is below 85VAC, a Boost regulator which will be turned on and provide 7.4V to 12V at the output and will power up the gadgets. This switching will be done by MOSFET which will be connected across the boost regulator input pin.
I already made this circuit, but the problem is about sensing the AC line. I tried to sense the AC using diode bridge, Filter caps and opto-coupler but facing difficulties related with the 85V AC. If I want to compare the converted DC across the diode bridge using comparator, what is the best way to wiring it?
Is there any alternative way to do that?
Thanks in Advance.