I'm trying to build a smps for a capstone project and am having trouble with the pwm portion of the circuit. When I'm simulating the buck portion it works with 18V dc-400kHZ-43% duty cycle. Now that I think about building the smps I don't know how I'm going to do the pwm. I've looked into gate drivers but don't know where to get the 18v supply. I'm assuming what the input voltage is the output is the same for a gate driver? I'm not trying to get an external power supply to power the gate driver. I was looking into using a microcontroller to do the pwm but it only outputs 5v. I've seen a logic level mosfet and was wondering if I could use this in my circuit and have the microcontroller hooked up to the gate?https://www.sparkfun.com/products/10213
Electronic – Building smps- pwm isssues
power supply
Best Answer
How about a 2 minute design review?