UCC21225A: DT (pin 6) current when connect with VCC

Jack Li-SH

Expert 3185 points

Part Number: UCC21225A

Dear sir,

Based on the UCC21225A datasheet, DT can be connected to VCCI that allow the output to overlap.

What about the input current of DT ( pin 6) when tying DT to VCCI?

Regards,

Jack

over 1 year ago

0 Akshat Murali over 1 year ago

TI__Expert 3285 points

Hi Jack,

Thank you for your question. I would like some more clarification. Are you asking about how the DT pin's input current will be affected if it is tied to VCCI?

Regards,

Akshat

0 Jack Li-SH over 1 year ago in reply to Akshat Murali

TI__Expert 3185 points

Hi Akshat,

customer plan to use 0402 resistor between VCC and DT pin for P2P with 2nd source, then check whether 0402 package(1/16W) is enough when design.

Nice day!

Regards,

Jack

+1 Akshat Murali over 1 year ago in reply to Jack Li-SH

TI__Expert 3285 points

Hi Jack,

Page 5 of the datasheet has a table of max power ratings. Compared to that, 16W is much higher than the threshold so it is fine. The DT pin current is almost negligible when it is pulled above a couple of volts. This resistor is enough for the design.

Hope this answers your question!

Regards,

Akshat

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UCC21225A: DT (pin 6) current when connect with VCC