PWM high side drive control 

[David]

#19152

I use PWM high side drive to control 4 CDC shock absorbers, with a control current of 0-2A for each CDC shock absorber and a control frequency of 1500H,. I use a 12V switch mode power supply for power supply, with a rated current of 30 amperes. When the total control current of the 4 CDC shock absorbers exceeds 3.6 amperes, the controller will activate overload protection and the control current will rapidly decrease to zero. May I ask what is the reason for this. I don’t have this problem using PWM low side drive to control CDC shock absorbers.The controller model is FlexCase G

[AmirF]

#19177

Hi David,

Is it possible that the power supply is limiting current and forcing the VCU to reset?
How inductive are the loads you are driving?
Which outputs are you using currently?

• This reply was modified 3 weeks, 4 days ago by AmirF.

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