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LM5155: Vsupply and Vbias of LM5155

takahiko yokota
Mastermind 7135 points
Part Number: LM5155

Hi

I think I use LM5155 under Vsupply=48V, Vbias=Vcc=15V  and Vout=16V.
May I use this device under this condition?

Best regards,
Yokota
  • 0
    TI__Mastermind 30925 points

    Hi Yokota-san,

    Thank you for considering the LM5155 in your system.

    Yes, you can tie Vbias and VCC together at 15V, but you must make sure that your FET gate voltage can handle the required voltage. However, I would recommend you to lower the Bias and Vcc voltage rail to 12V if it is possible so that you are not so close to the maximum rating pin. 

    Additionally, Vsupply must not be connected to the bias or vcc pin because you will violate the absolute maximum voltage rating. 

    Thanks,

    Richard