LM7322: For CFCI funcction

Lawrence He

Expert 2850 points

Part Number: LM7322
Other Parts Discussed in Thread: OPA171, OPA991, OPA2994

Hi, Support Team

We will use LM7322 to design AC charging Pile of CFCI function as below chart

have any concern?

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

over 1 year ago

0 Caro Walter over 1 year ago

TI__Mastermind 18937 points

Hey Lawrence,

Thanks for posting on e2e, is there a reason you have chosen LM7322?

All the best,
Carolina

0 Lawrence He over 1 year ago in reply to Caro Walter

Expert 2850 points

Hi, Caro

we reference TIDA-00637, have any concern?

if any suggestion, Please advise me.

Thanks,

Best regards,

Lawrence

0 Caro Walter over 1 year ago in reply to Lawrence He

TI__Mastermind 18937 points

Hey Lawrence,

Currently the LM7322 is very supply constraint, I would like to make a new part recommendation if available. Could you please share the timeline of your project?

All the best,
Carolina

0 Lawrence He over 1 year ago in reply to Caro Walter

Expert 2850 points

Hi, Caro
the project stage is EVT. what's new part recommend?
if any, Please advise me.
Thanks,
Best regards,
Lawrence

0 Caro Walter over 1 year ago in reply to Lawrence He

TI__Mastermind 18937 points

Hey Lawrence,

Looking at the TI Design, TIDA-00637, I recommend upgrading the OPA171 to OPA991 (already available on ti.com):

I would also add decoupling/bypass capacitors to the power supply pins of the op amp, making sure in the layout that the voltage trace travels through the capacitors before connecting to the power supply pins of the op amp.

Additionally, for the LM7322, we will releasing a part by end of June as a "Preview" marking, it will be orderable: OPA2994IDGKR (the pin2pin equivalent of LM7322MME/NOPB); the general part number is OPA2994.

I also reviewed the circuit you shared earlier, it is identical to the one in the TIDA design, therefore good with me! My only note is the same as above: I would add decoupling/bypass capacitors to the power supply pin of the op amp, making sure in the layout that the voltage trace travels through the capacitors before connecting to the power supply pin of the op amp.

All the best,
Carolina

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LM7322: For CFCI funcction