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ESD761-Q1: Is the ESD device suitable for the car USB/PD charging?

Max Guan
Prodigy 50 points
Part Number: ESD761-Q1
Other Parts Discussed in Thread: ESD751, ESD761

Hi,

I'm working on a car USB-PD charging block and trying to find some suitable ESD components for the CC and D+D- wire protection. 

In the car USB charging application, can the ESD751/761/1LIN24 -Q1 work as ESD device for CC1/CC2/D+/D- of the Type-C port as well? (please consider the data rate <1Mbps). And is there a proposed maximum support data rate for the 3 devices?

Is there a ~36-40V breakdown voltage device could fit in the case as well? All the 3 devices shall satisfy the short-to-VBUS but not that much to stand against the short-to-BAT case.

Please suggest if there is other solution preferred.

Thank you.

  • 0
    TI__Genius 14430 points

    Hi Max,

    These devices can support data rates up to ~1Gbps, there will be no issue supporting a data rate below 1Mbps. 

    These devices will all break down near 35 V, is the Vbus voltage 24 V or higher? 

    Regards,

    Sebastian 

  • 0 in reply to Sebastian Muriel
    Prodigy 50 points

    Hi Sebastian, 

    Thank you to confirm the data rate question, 1Gbps capability sounds perfect. 

    VBUS can be >20V for the PD EPR cases (28V, 36V, 48V) while it is not critical for now since 24V is enough for the PD SPR application. 

    I mentioned >35V because the car battery may reach ~40V in the load dump case. It is not very likely to happen but if it does, the 35V device will break down and is likely to get damaged. It would be good that the ESD device could break down ~40V. 

  • 0 in reply to Max Guan
    TI__Genius 14430 points

    Hi Max,

    The short to Vbus scenario will be fine with this device at 24 V or 28 V, at 36 V it would break down so a higher voltage diode would be needed for that case.

    If you want to protect from a load dump scenario our current automotive portfolio won't have any diodes that can handle a 40 V load dump.

    Our ESD761/751/LIN24-Q1 devices were designed to protect from a short to battery scenario for 12 V battery systems. They can't protect from a short to battery above the working voltage. 

    Regards,

    Sebastian