I'm looking to build a motor controller where I want to have consistent motor performance. Normally you have a 6v DC motor and you can plugin a 7.2v battery pack directly and be fine, but the motors start out running really hard and slowly fade as the battery level drops. So I was thinking of building/buying a DC-DC power supply so the motors would get a consistent 6v but still be able to draw a lot of current. Digikey has a 10A 6V Murata OKR-T/10-W12-C DC-DC converter for $10. While I can buy one, I always like learning to build my own and would like the ability to have a final product have both the motor controller and DC converter in one. The motors I'm working with have a stall current of 6A each.
1) Is a DC-DC converter a good solution for my situation?
2) Would that Digikey DC-DC converter work in this situation?
3) Are there better alternative solutions?
Any pointers in the right direction would be much appreciated.
Here are some TI components I'm going to experiment with:
LM3150 - SIMPLE SWITCHER® CONTROLLER, 42V Synchronous Step-Down
PTN78020W - 6-A Wide-Input Voltage Adjustable Switching Regulator
LM2587 - 5A Flyback Regulator
TPS56921 - 4.5V to 17V Input, 9A Synchronous Step-Down SWIFT? Converter with VID Control