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Original question:

DRV103: DRV103

DRV103: DRV103

Manuel Valenzuela
Prodigy 40 points

Part Number: DRV103

Tool/software:

Hi,

If my coil can draw up to 5A but I only need 2.5A from it, can I use the DRV103 so that it limits the current to 3.5A and the have some sort of PWM duty cycle?

Thanks.

  • 0
    TI__Expert 8290 points

    Hi Manuel, 

    Thank you for your question. DRV103 can drive up to 3A and it does not have current regulation.  The over-current fault occurs when the PWM peak output current is greater than approximately 3.75A. The output current should be controlled by the PWM.

    Please let me know if you have any more questions. 

    Best regards

    Mojtaba

  • 0 in reply to Mojtaba Afshar
    Prodigy 40 points

    Hi Mojtaba,

    A couple of questions. First on the the DRV103 datasheet it mentions a current limit of 4.2A max. Is In the case where my coil can draw 3.7A is there a scenario where my coil would see less than that? Does the DRv103 get damaged at 4.2A?

    Also, Regarding the input pin (pin 8) does it always have to be connected to some sort of voltage spply for the DRV103H to activate? Is there a way to connect it to GND and have the DRV103H still function?

    Please advise and thank you.

    Best,

    Manuel Valenzuela.

  • 0 in reply to Manuel Valenzuela
    TI__Expert 8290 points

    Hi Manuel, 

    Manuel Valenzuela said:
    A couple of questions. First on the the DRV103 datasheet it mentions a current limit of 4.2A max. Is In the case where my coil can draw 3.7A is there a scenario where my coil would see less than that? Does the DRv103 get damaged at 4.2A?

    The typical continuous output current for DRV103H is 3 A, and the current limit is 4.2 A Max. It means that the device can operates under 3 A continuously for a long time without any damages.  But it can tolerate temporary MAX 4.2 A, and if it remains for long time it will damage the device.

    Manuel Valenzuela said:
    Also, Regarding the input pin (pin 8) does it always have to be connected to some sort of voltage spply for the DRV103H to activate? Is there a way to connect it to GND and have the DRV103H still function?

    The Pin 8 is used to enable the Outputs. it should be typically higher than 1.7V to enable the outputs. It also should not be directly connected to the power supply (VS) or damage will occur. it is an ON / OFF enable pin. So connecting to GND means the device is disabled. 

    Please tell me about your application and requirements, then I can better assist you to choose appropriate product for your application. 

    Best regards, 

    Mojtaba