• State
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 15 views
  • Users 0 members are here
Support feedback
Options
Options
Related

TPD2E2U06-Q1: Suitable ESD protection device selection for TPS25854-Q1 D+ and D-

Yoshiki Ochi
Genius 9365 points
Part Number: TPD2E2U06-Q1
Other Parts Discussed in Thread: TPS25854-Q1, , TPD4E02B04-Q1

Tool/software:

Hi team, 

Could you help select suitable ESD protection device selection for TPS25854-Q1 D+ and D-? Below are candidate. 

  • 2ch: TPD2E2U06-Q1
  • 4ch with low voltage: TPD4E02B04-Q1

ESD protectoin is for TPS25854-Q1 D+ and D- absmax is +6V. On the ohter hand, ESD protection device breakdown voltage are higher than TPS25854-Q1 absmax. Are they right device? 

Regards,
Ochi

  • 0
    TI__Expert 5880 points

    Hi Ochi-san,

    Typically, we recommend selecting a diode with a clamping voltage around the absolute maximum, and as you have shown, these devices have a higher clamping voltage compared to the abs max of the TPS25854-Q1 device. It is possible that TPD4E02B04-Q1 would be suitable since there is ~1V variation in DC abs max vs AC abs max, but testing in the customer's system would need to be done to verify this, as this may also depend on other components in the system.

    It would also be possible to place a resistor downstream from the diode to create a voltage drop to lower the effective voltage that the downstream IC will see. I am not sure if this will be practical to implement, but selecting the appropriate resistor value might allow for either of these devices to properly protect the TPS25854-Q1 device.

    Is there any impedance budget to allow for a resistor to be placed? 

    Best Regards,

    Josh Prushing