I would need to boost about 4,8 V to 9 V and be able to draw up to 3 A of current. I have 4 NiMh cells in series and I want to up the voltage to 9 v. I looked up some regulators but they doesn't seem to be able to supply as much as 3 A for my load even though the regulator is rated for 3 A. I thought about the possibility of using a mosfet or something that can provide higher current than the regulator can provide. Any help on a suitable circuit would be much appreciated.
Reason for voltage regulation is that I'm concerned about the voltage. When batteries are fresh, they meassure higher voltage which then drops when they drain. I could design for the higher voltage, say that I used 8 NiMh in series to get about 12 V, but after they've drained for a while, the voltage drops and then I'm concerned that the circuit will perform to lesser satisfactory. Any tips how I could get around this without the need of voltage regulation?
Reason for voltage regulation is that I'm concerned about the voltage. When batteries are fresh, they meassure higher voltage which then drops when they drain. I could design for the higher voltage, say that I used 8 NiMh in series to get about 12 V, but after they've drained for a while, the voltage drops and then I'm concerned that the circuit will perform to lesser satisfactory. Any tips how I could get around this without the need of voltage regulation?