NFCのトピックRe: Current on PVDD

Current on PVDD

PaoloDS — Fri, 18 Feb 2022 11:14:38 GMT

I'm using a CLRC663 in LPCD an all is ok.

But i measure the current consumption on the chip and measured 175uA. I separate the power supply and I measured 5uA on TVDD and 150uA on PVDD.

I can't find specifications about PVDD current.

There's a way to reduce this current, because I supposed that in LPCD the total consumption will be lower then 175uA.

Paolo

Re: Current on PVDD

fangfang — Mon, 21 Feb 2022 02:17:10 GMT

Hello @PaoloDS ,

Please kindly find the detail information of Table 254. Characteristics in DS as the link.

URL:https://www.nxp.com.cn/docs/en/data-sheet/CLRC663.pdf.

Hope it help you.

Have a nice day.

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Re: Current on PVDD

PaoloDS — Mon, 21 Feb 2022 11:33:52 GMT

I red a lot of time table 245, but I can't find the value that I need.

My measures on my board are 5uA on the TVDD pin and 150uA on PVDD pin, while the chip is in LPCD.

Can You help where I find on the Table 245 that this value are correct or not?

Thank's.

Paolo

Re: Current on PVDD

fangfang — Tue, 22 Feb 2022 02:39:29 GMT

Hello @PaoloDS ,

Thanks for your update information.

Table 245 is correct. And I have the testing current consumption of LPCD for the CLRC663. I will send it via email. You may refer to it.

Have a nice day.

Re: Current on PVDD

PaoloDS — Tue, 22 Feb 2022 08:14:07 GMT

Hi.

I did not say that table 245 was wrong, I said that I can't find in table 245 the info that I need.

CLRC663 have 3 differents power supply input: VDD, PVDD and TVDD. It's possible to know which are the different current on this 3 different pins?

Because if I want to reduce power on TVDD I have to change the antenna characteristics (in my board I have 5uA on TVDD, and for me is perfect).

But in my board I have 175uA on PVDD and I dont' know in which way may I reduce it!

Best regards

Paolo

Re: Current on PVDD

PaoloDS — Thu, 24 Feb 2022 11:02:41 GMT

I wrote table 245, but I meen table 254.

I tried the currents using your CLEV6630b V2.0 your "NFC cockpit " .The values on LPCD overall average current is 451uA wih the basic settings.

But the current on VDD power pin is 600uA with any LPCD setting.

Can you help me, to reduce this current?

Best regards.

Paolo