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LM51561-Q1: DITHOFF pin

Part Number: LM51561-Q1

Tool/software:

Good day, colleagues,

To activate the dithering, the pin shall be connected to GND.

In the Datasheed I have seen, that the device has schmidt trigger for the activation and deactivation:


The question is:
How great is the input current of this pin, or the equivalent circuit diagram of this input?

In customers application they have the pin is connected with a pulldown to GND and not directly like recommended.
In general they need to know, if there is a minimum resistance to GND needed (and the value)  to ensure the activation of the dithering.

Thank you,

Daria

  • Hi Daria,

    We do not specify the input current to this pin. However, as it is a input to a comparator, the current flowing into this pin is very low.
    So a pulldown resistor can be used and the activation can be done using a microcontroller for example.

    Best regards

    Moritz