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AFE3010: AFE3010 Question

Paul Joseph
Expert 2795 points
Part Number: AFE3010

For a UL943 listed GFCI application, any software relied upon for safety purposes must also comply with UL1998.  Does the AFE3010 rely on any software internally?  If so, has it already been investigated by UL?

 

2) For an application that uses a current interrupter, like a contactor, is there any special precaution to take regarding the SCR pin and its self-test feature?

 

Please advise, thank you.

  • 0
    TI__Mastermind 22470 points

    Paul,

    Our expert on this device is out of office at the moment. I will notify him of this post, but it will most likely be next Monday when we can properly address your issue here. 

  • 0
    TI__Mastermind 32395 points

    Hey Paul,

    There is no software. It is all digital logic.

    For the second question I am not sure what you mean. Are you saying that a contactor is used as opposed to a solenoid? If this is the case (thus SCRTST pin is not pulled up to rectified line voltage), then maybe this would require a circuit modification. The SCRTST pin has a watch-dog timer self test that is always looking for LINE voltage. thus if it is not pulled up because contactor's input pins are being controlled by SCR, then device will fail this watch dog timer.

    The SCR self test also relies on the fact that the SCR anode will be pulled up (through solenoid + diode) to line voltage so if you are replacing the solenoid (inductor) with a contactor (high resistance, no inductance), then device will not be able to perform SCR self test.

    You can always test if this will be a problem by turning off SCR self test by setting SEL pin to float; however, you will still need to pull SCRTST pin up to Line via large resistance such as a 1MOhm resistor. It is also valid to connect SCRTST pin and PH pin together when SEL pin = float.

    Hope this helps.

    Best,

    Peter