Buck-Boost converter

*input 5-32V ( with a lower voltage the ripple of the output is lower) *output 260mV-25,5V *the max power need max voltage on input (=~650W on 32V and =~7,5W on 5V)(if you go to change the imput voltage remember to change the maximum voltage of the OpAmp *5V is the minimum I tested *12V -> 12V (1A) =~ 85% of efficiency (a bigger induction can better the efficiency but with less total power possible) and less than 100mV or riple *use a schottky diode to improve efficiency *the Mosfet is a IRl2505 and the transistor is 2n2222 *you can ajust the output with the potentiometer *you can use a 555 timer to do the ocilator job for you, but I dont recomend *I don't recomend to increase the frequency unlees you realy need, because the gate of the mosfet don't have time to saturate(if you decrease the gate resistor the eficience decrease and you can damage the OpAmp) *REMAMBER, IT IS A CONVERTER, IT DON'T CREATE ENERGY FROM NOTHING THIS IS WHY THE HIGH-CURRENT IN THE INPUT

published 8 years ago