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ULN2003A: max. output current

Hung Ching Hsu
Expert 3086 points
Part Number: ULN2003A
Other Parts Discussed in Thread: ULN2003LV, ULN2003V12, DRV104, DRV103

Hi Team

My customer is considering use ULN2003ANSR as output buffer of electronic buzzer. 

The absolute maximum rating of the peak collector current is 500mA from datasheet,

can ULN2003A withstand inrush current (about 800mA) for several μs? (The typical current value is about 30mA.)

If not, could you recommend any technique(maybe reduce the current) or suggest other parts that can flow 800mA? 

Thanks.

  • 0
    TI__Genius 10652 points

    Hung, 

    ULN2003A shouldn't be used beyond ABS max conditions, although it would more than likely survive for such short time. Regardless we can't recommend the customer to do this. 

    One solution is to parallel multiple channels which will be <=400mA/channel and ensure compatibility with our datasheet limits :)

    If you really need to not waste multiple channels and would rather have all 7 channels available, we do have higher-current capable load switches.

    Would recommend you to take a look at ULN2003V12 (20V part), ULN2003LV (50V part) which are 7ch darlington arrays just like ULN2003A. 

    DRV103/DRV104 are high-current options which just have one channel . 

    If any other questions, please let me know, but if this answers your questions fully please let us know by pressing the green button. 

    Best

    Dimitri