TIDUCL0 January 2017
Figure 53 shows the winding current of 120 A when the motor is stalled for 3 seconds. Figure 54 shows the thermal image of the board after 3 seconds.
Figure 55 shows the peak winding current of 180 A when the motor is stalled for more than 1 second. The average motor current is approximately 160 A for this duration. Figure 56 shows the thermal image of the board after 1 second.
The high peak current capability ensures that in power tool applications, the power stage aids the motor to deliver high peak torque. If the stall current continues to be high, over temperature or blocked rotor protection will act to shut off the system.