CSD87312Q3E vs. CSD85312Q3E

Akash Patel

Other Parts Discussed in Thread: CSD87312Q3E, CSD85312Q3E, BQ24780S

Hi team,

We currently have the CSD87312Q3E in our design and are interested to see if we have a part that has lower Rds(on) with similar functionality. I came across to the CSD85312Q3E. Could you elaborate on the differences between the two parts?

Also if you have suggestions for other parts that may be a fit, please let me know.

Thank you,

Akash Patel

over 8 years ago

0 Brett Barr1 over 8 years ago

TI__Mastermind 18200 points

Akash,
The biggest difference between these two parts is the CSD85312Q3E is only 20V BVDSS (which is why it is so much lower Rdson) where as the CSD87312Q3E is 30V rated.

So the real question is do you required 30V or 20V. If only 20V, then the CSD85312Q3E will likely perform better thermally.

What is your application that requires back to back FETs? We also have smaller options - how much current do you need to carry and are you space constrained?

0 Akash Patel over 8 years ago in reply to Brett Barr1

TI__Expert 6245 points

Hi Brett,

Thanks for the quick reply! I think 20V would be okay in our design. We are interested in using this as the N-FET driver for the BQ24780S www.ti.com/.../bq24780s.pdf

Regards,
Akash Patel

0 Brett Barr1 over 8 years ago in reply to Akash Patel

TI__Mastermind 18200 points

Akash,
If you only need 20V, the CSD85312Q3E is probably ideal.

I would recommend reaching out to Kevin O'Connell, the PME for these devices for more information.

0 Akash Patel over 8 years ago in reply to Brett Barr1

TI__Expert 6245 points

Brett and Kevin,

Can you also expand on the differences on the Qg and Qgd parameters and how that would make a difference here?

Regards,
Akash Patel

0 Brett Barr1 over 8 years ago in reply to Akash Patel

TI__Mastermind 18200 points

Akash,

I will let Kevin reply to this outside of this E2E thread.

Because of the Thanksgiving holiday in the U.S., TI E2E™ design support forum responses may be delayed from November 25 through December 2. Thank you for your patience.

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CSD87312Q3E vs. CSD85312Q3E