I have 3.8V and 1.2Ah battery. I will use a step up circuit that gives 5v and 200mA output using 2v in (from my battery). Then I will use blocking diode to take voltage only(5v) and I don't need current from this circuit. Again I will also use a step down circuit that gives 1v and 2A output using 3.5v in (from my battery). Then I will use another blocking diode to take current(2A) only and I don't need voltage from this circuit.
So can I get 5v and 2A output in this way from a 3.8V and 1.2Ah battery? And now what will happen with my battery?
I need to understand that if I can get more power out of the circuit than comes out of the batteries. To extrapolate what I want to do, imagine I want to power my house with 240V @ 100A (24KW). I want it with a 1V @ 100A (0.1KW) power source combined with a 240V @ 1A (0.24KW) power source.
If to power my house with 1v@100A(taking the current only from here using blocking diode) and with 240v@1A(taking the voltage only from here using another blocking diode) and combine both of this to get 240@100A.
Is it possible? Well if it is possible I will again feed back the 5v and 2A output to battery to recharge it. So before being the battery empty(if) I will be recharging it again by the estimated output from the combined circuits.
Will the battery really be empty after producing separately stepped volt and current or can I get volt(5v) and current(2A) greater than my battery (3.8V,1.2Ah) in this way?
Does my thinking have a hope? My step up and step down circuits are as following as example:
http://www.alibaba.com/product-detail/DC-DC-2-0-5-v_1547670640.html?spm=a2700.7724838.102.7.vDaE3Z
Best Answer
As Mike DeSimone points out, your battery can't produce 3.8 V and 1.2 A at the same time.
But even if it did, that would only be about 4.6 W.
You want to use it to power something with 5 V and 2 A. That's 10 W.
You can't do this without first overturning the entirety of conventional physics by disproving conservation of energy.