cancel
Showing results for 
Search instead for 
Did you mean: 

Confusion surrounding inductor values for BlueNRG-2 design

donpedro
Associate II

Hello ST/Forum,

I have a design where there seems to be confusion surrounding the inductor values and names:

In the "PCB design guidelines" the inductors are name L14, L13 and L6.

However, in the codebase, the inductors are called "RM1" and "PMU" inductors.

I cannot find any documentation about the correlation between them

Please clarify what the relation between them is.

1) What inductor does RM1_DIG_ENG_REG map to ?

2) What inductor does PMU_ANA_ENG_REG map to ?

3) Does the chip use the inductor values in RADIO_CONFIG for anything else than BOR detection? Please clarify this.

Please clarify this, as we are having strange shutdowns which are likely caused by this.

info: We are running on:

BlueNRG-2 234 CSP34 with the following setup:

L13 = 10uH

L6 = 15nH

L14 = 4,7nH

We are running with integrated balun, DC-DC converter ON, as described on page 4 in the "PCB design guidelines", AN4819-REV2.

Thanks,

/pedro

0 REPLIES 0