I'm designing an ESC with a small microcontroller running at 3.3V. The BLDC motors I have chosen are extremely small, and run best at 3.7V. I have the power supply for both of these (3.7V is VBATT, 3.3V is obtained using a buck converter). They are 3 phase, and the controller needs to be sensorless. I would like to measure RPM and current usage as well if it doesn't mean I will have an overly complicated design.
All the docs I have found are great for higher voltages, and ridiculous currents (I will max out at ~5Amps at 3.7V, I don't necessarily need to design a 100V, 300A ESC).
Questions I have:
Is there a reference design I can follow somewhere around the net?
What kind of protection circuitry should I use?
How simple can I go?
Are there any ICs that will simplify the circuit even further?
Any other recommendations/tips/pointers?
Thanks for your time,