【PMIC PF8100】How to set BUCK6 output 0.5V voltage

cancel
Showing results for 
Search instead for 
Did you mean: 

【PMIC PF8100】How to set BUCK6 output 0.5V voltage

67 Views
jianwei_lan
Contributor II

Dear friend

 

 

I want PF8100‘s BUCK6 output 0.5V voltage, how can i do ? 

 

 

 

-----

BR

your friend

 

 

 

 

0 Kudos
3 Replies

44 Views
TomasVaverka
NXP TechSupport
NXP TechSupport

Hi Gianwei,

0.5V corresponds to 0x16 or 0b0001 0110. This value needs to be written to the SW6 RUN VOLT register (0x79).

Also make sure that SW6_VTTEN = 0 (VTT mode disabled).

Best regards,

Tomas

0 Kudos

58 Views
john_phillippe
NXP Employee
NXP Employee

The VSW6_RUN[7:0] bits need to be set appropriately.  The datasheet describes this.  I believe a value of 0x10 will set the output voltage to 0.5V.  6.25mV steps * 16 = 0.1V.  The starting point of VSW6_RUN is 0x00 which gives 0.4V, so a 0.1V offset = 0.5V.

https://www.nxp.com/docs/en/data-sheet/PF8100_PF8200.pdf

0 Kudos

50 Views
jianwei_lan
Contributor II

Dear friend 

 

can you show me an demo and API about how to change BUCK output voltage ?

 

---

BR

your friend

0 Kudos