ADP5587 SPEC. Question

Dear Sir:

ADP5587 can be used for push-pull architecture? Another AD5587  GPIO(R0~R7,C0~C7) ,If useing Open-drain or push-pull mode in system design. Each GPIO can accept the sink current is how much?

Best Regards,

Jacky

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    •  Analog Employees 
    on May 6, 2013 10:58 PM over 7 years ago

    Hi Jacky,

    The ADP5587 is not the best solution.  It's pulldown pins are only spec'd at 1mA.  And the pins are only rated to 4V (max).  This would be a problem if one of the LEDs was off--then the pin would be pulled up to almost 9V.

    Instead, we have several other parts that would work well:

    1.  Do you need independent control of each LED?  If not, then the ADD5205 would work very well.  It takes an input voltage of 2.7-18V and drives the LEDs at up to 100mA. 

                   http://www.analog.com/add5205

    2.  If you do need control of the LEDs, then our low voltage converters would work well.  I would recommend the ADP886x family of parts.  You can view them here:

                   http://www.analog.com/en/power-management/display-and-lighting/products/index.html

         To drive all 18 LEDs, you can use 2 ICs, or you can use ballasting resistors to parallel the LEDs, like this:

             

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  • 0
    •  Analog Employees 
    on May 6, 2013 10:58 PM over 7 years ago

    Hi Jacky,

    The ADP5587 is not the best solution.  It's pulldown pins are only spec'd at 1mA.  And the pins are only rated to 4V (max).  This would be a problem if one of the LEDs was off--then the pin would be pulled up to almost 9V.

    Instead, we have several other parts that would work well:

    1.  Do you need independent control of each LED?  If not, then the ADD5205 would work very well.  It takes an input voltage of 2.7-18V and drives the LEDs at up to 100mA. 

                   http://www.analog.com/add5205

    2.  If you do need control of the LEDs, then our low voltage converters would work well.  I would recommend the ADP886x family of parts.  You can view them here:

                   http://www.analog.com/en/power-management/display-and-lighting/products/index.html

         To drive all 18 LEDs, you can use 2 ICs, or you can use ballasting resistors to parallel the LEDs, like this:

             

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