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TPD4S012

eli
Guru 13485 points
Other Parts Discussed in Thread: TPD4S012, TPD4E1B06, TPD4E1U06

Regarding USB OTG ESD protection.

At the DM36x board and TI recommends TPD4S012 IC. 

As I see it, it’s an old EVB (2009) so is there any better replacement for TPD4S012 due to its 500nA max leakage current.?

is the TPD4E1U06 or TPD4E1B06 are the right solution?

Also.What is the main difference?One supposed to be Uni-Directional and the other Bi-Directional but basically they do the same thing:

Connect to data lines, to GND and suppress any transients

  • 0
    TI__Genius 12190 points
    Hi Eli,

    For low leakage protection for USB OTG ESD protection TPD4E1U06 is the right choice. The difference between uni directional and bi-directional is two-fold: uni-directional allows a signal range from 0 V to Vbr (example: 7 V) and bi-directional allows a signal range from - Vbr to Vbr. Also, uni-directional clamps negative ESD voltages much lower than bi-directional. When possible, always choose a uni directional TVS for the lowest clamping voltages. The clamping voltage is the voltage presented to the protected IC during an ESD event.

    Regards,
  • 0 in reply to Guy Yater
    Guru 13485 points

    Hi Guy

    Thank you for that good information.

    Most application notes uses unidirectional for USB although there are some who uses bidirectional which says it could not be worse.

    For single ended lines I understand why unidirectional is better but for differential (USB_DM, USB_DP) isn't bidirectional should be more effective because of  negative line. When bidirectional will not conduct until reaching -VBR ,while unidirectional will conduct when dropping below 0v.? For the positive line it's ok. But for the negative .?