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ST25R3916B Code that controls RF power

he2
Associate II

您好

我们使用NFC08A1开发板做NFC识别时,功率无法达到介绍中的1.7W。

开始以为是VDD_RF的电压偏低,然后控制寄存器2C的rege将VDD_RF的电压设置为5.1V,使用B区域寄存器2C和万用表读取都没达到5.1V,测量到的最高电压只有4.9V。而且运行直接命令开场后电压降为4.6V。开发板的最高电流只有100mA。排查过供电电源没有功率受限的问题。

想问下如何提高功率,期待获取到贵公司的指导。

 

Hello.

When we use the NFC08A1 development board for NFC identification, the power cannot reach the 1.7W in the introduction.

At first, it was thought that the voltage of VDD_RF was low, and then the rege of the control register 2C set the voltage of VDD_RF to 5.1V, but the reading of the B-zone register 2C and multimeter did not reach 5.1V, and the highest voltage measured was only 4.9V. And the voltage drops to 4.6V after running the direct command. The maximum current of the development board is only 100mA. Checked that the power supply is not limited.

I would like to ask how to improve the power and look forward to getting your guidance.

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11 REPLIES 11

Hi,

best if you go through our local sales team. On https://www.st.com/content/st_com/en/contact-us.html you can find various offices, including the STMicroelectronics China office in Shanghai. Maybe you try to call them up.

Or you create a support ticket on ols.st.com. But no idea which way will be better/faster.

BR, Ulysses

Hello,

 

You can find your local ST sales office information ther e:

Contacts - STMicroelectronics

Best Regards,

BB