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LM66100: Ideal Diode vs ORing Controller vs Ideal Diode Controller

Franz Schellhase
Expert 3605 points
Part Number: LM66100

Hi,

I have difficulties finding the differences between Ideal Diodes, ORing Controllers and Ideal Diode Controllers. Do you have a comparison table of what they are capable of in general?

My thought process is as follows:

  • Ideal Diode = ORing Controller with integrated FET
  • But Ideal Diode Controller has external FET
  • What is the difference ORing Controller vs. Ideal Diode Controller?

Thank you,

Franz

  • 0
    TI__Mastermind 34935 points

    Hello Franz,

    We will work on getting an explanation and getting back to you on this post. In the meantime I would recommend reading the 11 Ways to Protect Your Power Path eBook as it provides some good information on ideal diodes and ORing controllers. 

  • 0 in reply to Timothy Logan
    TI__Genius 16305 points

    Hello Franz,

    Yes Ideal diode controllers drive external MOSFET to emulate an ideal diode.

    Ideal diodes are ideal diode controllers + integrated MOSFETs

    Ideal diode controllers have integrated reverse polarity protection but ORing controllers require external components to provide reverse polarity protection.

    Mainly in the GND path of the IC, a diode and MOSFET combination is used to provide this.

    Please refer to the TI Design "http://www.ti.com/tool/TIDA-00992" on using ORing controller LM5050 for reverse polarity protection and low Iq.

    Basically, this additional circuit is to provide protection to the IC when input polarity is reverseed. If not protected, IC could damage due to huge current flow on the ESD diode on input pin.

    Regards,

    Kari.