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ULN2803A: Paralleling ULN2803A and Overcurrent Protection

Mehmet_Akif Ceylan
Intellectual 310 points
Part Number:

Hi

I want to drive solenoids with ULN2803A. I am planning to use 2 parallel wired ULN2803A. Is there any protection against high current? Solenoids that I use are draining 1.3A at 24V but 1A is also enough them to operate. Could chip limit over current?

Also is that possible to parallel them like circuit that I shared?

Thanks.

  • 0
    TI__Genius 10652 points

    Hey Mehmet, 

    Mehmet_Akif Ceylan said:
    Is there any protection against high current?

    ULN2803A do not have any overcurrent protection, and can not limit the current in the case of overcurrent situation. 

    Mehmet_Akif Ceylan said:

    Also is that possible to parallel them like circuit that I shared?

    Yes, you can do this. Each leg may not consume exactly the same current due to the manufacturing tolerances, but this shouldn't be an problem

    If this answers your questions please let me know by pressing the green button

    Best

    Dimitri

  • 0 in reply to dimitri james
    Intellectual 310 points

    Thank you for your reply.

    Is there any difference between ULN2803ADWR and ULN2803ADWRG4?

  • 0 in reply to Mehmet_Akif Ceylan
    TI__Genius 10652 points

    Mehmet, 

    They are exactly the same part. No differences.

    If this answers your questions please let me know by pressing the green button

    Best

    Dimitri