A lot of motor drivers in the market specify their current ratings according to the MOSFET specifications. This is highly inaccurate and overrated because the actual current capability is dependent on many other factors such as switching frequency, heatsink efficiency, PCB size, copper thickness and etc. At Cytron, we test all our motor drivers by running the motor at full load in our lab and monitor its temperature with thermal camera. This test is carried out until the temperature stops increasing and reaches a stable point (usually achieve in 15 minutes). This way, we can get the true current ratings for all our motor drivers.