• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 461 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

EMB1428Q: Reason for Schottky diode D24

Michael Z6
Prodigy 100 points
Part Number: EMB1428Q

In the EM1402 reference design schematic (see link below) on page 4, there is a schottky diode D24 and resistor R86. These components are not present in the typical application schematic in the EMB1428Q datasheet.

What is their purpose? Are they a required protection circuit? In our design, the EMB1428Qs sometimes fail permanently (fail to charge the cell). Replacing the EMB1428Q fixes the problem. We are wondering if our omission of these components could be the reason.

Link: www.ti.com/.../tidrn59a.pdf

Thanks

  • 0
    TI__Genius 9401 points
    Hi Michael,

    These components are for extra transient protection. Once scenario where these would protect the device is for example during hotplug events. If you have large transients you could end up exceeding the abs max of the pin and damage the device.