MC33887 - Current peaks on motor activation

[WolfgangCS]

Hello,
I am using an MC33887PFK to control a 24V Brushed Maxon DCX-22 S motor.

When I go to enable the motor by putting a high level on the EN pin voltage, there is a surge of current coming from the power supply over 3A on the motor.

Is there any way to limit this spike? Or a way to enable the motor gradually?

Thanks.

[JozefKozon]

Hello Amadeo,

there is a possibility to connect a PWM signal to one of the input pins. Either IN1 or IN2, while keeping the second input constantly high. You can start for example with 5% duty cycle and increasing the duty cycle to 100%. 

Please refer to the section 12. for switching waveforms. You can limit the output current with the duty cycle of the PWM signal brought to one of the inputs. 

With Best Regards,

Jozef