Hello,
I have been trying to find components that would enable to transfer energy from two supercapacitors. From upper to lower and from lower to upper, bidirecional. As shown in the picture below.
I tried a buck converter with integrated Mosfets, BD9A400MUV-e, in Orcad PSpice but it doesn't work because this buck converter is not bidirecional,
I controlled the feedback voltage in order for it to work and the problem is that when the output voltage needs to be decremented the lower Mosfet is activated. But the circuit has no load so that the output capacitor can discharge, it occurs a short circuit between the output capacitor and the inductor.
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The requirements I have is that both supercapacitors can be within 0.5V of each other. And the system must be apple to support their values between 1.35v-2.75v each, combined 2.7V-5.5V, more less.
Ideally was a integrated converter but I don't seem to find one that can accomplish this. Since my system is able to measure the inductor current with only the voltage variation of the capacitors. I intend to use a pic to generate the PWM signal with dynamic duty cycle, a Driver for two Mosfets and a module with two Mosfets, upper and lower N-Mosfets.
Any insight about this last method would be appreciated, such as the components or even other way of accomplishing this with TI components.
Thank you,
Rodolfo Reis
