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  • TI Thinks Resolved

TLV3501: Regarding SHDN/EN pin in TLV3501?

Prodigy 20 points

Replies: 4

Views: 86

Part Number: TLV3501

Hi , I am using this IC for comparaing two voltages but I am little bit confused for using SHDN/EN pin. Can yoy please tell me what should be the voltage at EN pin and how it affects the circuit? I  read the data sheet but it is quite confusing.

  • Sorry for the confusion.  If you apply a logic high level to the shutdown pin, the output no longer tracks the condition on the input pins and the quiescent current reduces.  a logic low signal is required for the comparator to operate.

    Chuck

  • In reply to Chuck Sins:

    So, I want my comparator to generate an ON-OFF signal for the gate driver than tell me the shutdown pin should range from (V+-1.7) to (V+-0.9) as given in the data sheet or I should ground it ?

  • In reply to Monika Dabkara:

    Monika

    To better explain, I created an example where I assume that (V+) = 5V. 

    Disable shutdown feature => SHDN < 3.3V = ((V+) - 1.7V)

    Enable shutdown feature => SHDN > 4.1V = ((V+) - 0.9V)

    The key is to notice that VL has a max allowable value to disable shutdown, while VH has a min allowable value to enable shutdown.

    Hope this is more clear.

    Chuck

  • In reply to Chuck Sins:

    Monika

    There has been no further questions, so I will close this thread.  If additional support is required, feel free to reply or open a new thread.

    Thanks

    Chuck

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