David_
Advanced Member level 2
Hello.
I am looking for a circuit to convert a single positive low voltage(a 3,7V Li-ion battery so 3,2V-4,2V, or 5V) into a symmetrical power supply of somewhere around ±12V while delivering up to at least 1A for each rail.
I find a few simple circuits using different IC's to convert 5V into ±15V but they do never deliver more than around 200-300mA and that is the most powerful circuits, others deliver 70mA or 10mA as two examples.
I would not be sad if it was a isolated output design and in fact I am pondering making that a design criteria, I also like as low a noise as is reasonable since this will be powering analog circuits making measurements that I want to be performed with the utmost fidelity. That is my wish-list at least but any circuit that produces ±12V from 3,7V or 5V is good.
I would also be happy if I didn't need to design my own flyback/forward from scratch so to say, do any one know of any circuit like this that rely on a external pass transistor and not a IC's internal switch?
Or does anyone have any tip about this hole thing in general?
Regards
I am looking for a circuit to convert a single positive low voltage(a 3,7V Li-ion battery so 3,2V-4,2V, or 5V) into a symmetrical power supply of somewhere around ±12V while delivering up to at least 1A for each rail.
I find a few simple circuits using different IC's to convert 5V into ±15V but they do never deliver more than around 200-300mA and that is the most powerful circuits, others deliver 70mA or 10mA as two examples.
I would not be sad if it was a isolated output design and in fact I am pondering making that a design criteria, I also like as low a noise as is reasonable since this will be powering analog circuits making measurements that I want to be performed with the utmost fidelity. That is my wish-list at least but any circuit that produces ±12V from 3,7V or 5V is good.
I would also be happy if I didn't need to design my own flyback/forward from scratch so to say, do any one know of any circuit like this that rely on a external pass transistor and not a IC's internal switch?
Or does anyone have any tip about this hole thing in general?
Regards