I am building a battery powered project, I'll be using a 4S LiPo battery. My actuators include linear actuators and stepper motors, which run on 12V and 6V respectively. Hence, I need a buck converter(2 in fact, 12V and 6V ) to maintain a constant constant input voltage to the actuators, so I was thinking of using of LM2576/LM2596 IC's for this part. However my current requirements are about 10 Amps which these IC's cannot fulfill.
1. I want to use IC's for buck operation because it will reduce my efforts of designing a feedback network. I cannot be using a IC rated 10A or above as it is out of my budget.
2.I was wondering if I could just add a Darlington pair in series with the buck converter ic so as to amplify the current. I'll be connecting the collector directly to the battery. Is this a valid approach?
3. If this is not a valid approach, pls explain why? And also guide me what should I be doing, using some IC and current boosting method OR building entire buck converter(including feedback) by myself?
1. I want to use IC's for buck operation because it will reduce my efforts of designing a feedback network. I cannot be using a IC rated 10A or above as it is out of my budget.
2.I was wondering if I could just add a Darlington pair in series with the buck converter ic so as to amplify the current. I'll be connecting the collector directly to the battery. Is this a valid approach?
3. If this is not a valid approach, pls explain why? And also guide me what should I be doing, using some IC and current boosting method OR building entire buck converter(including feedback) by myself?