MC34VR5100A2EP compatibility with LX2160A PMBus

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MC34VR5100A2EP compatibility with LX2160A PMBus

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Miguel-Avina
Contributor IV

Hi,

Our customer wants clarification about the compatibility of the MC34VR5100A2EP PMIC with the LX2160A PMBus. Specifically, their question is the following:

Will the NXP PMBus driver work with this?  Can the slope (m) be changed to a different value based on Read or Write.

 

Using Direct Mode

VOUT_COMMAND

R=0

m=500

b=0

 

READ_VOUT

R=0

m=800

b=0

 

For VOUT_COMMAND

MiguelAvina_0-1658343842936.png

 

For READ_VOUT

MiguelAvina_1-1658343842941.png

 

MiguelAvina_2-1658343842953.png

Thank you

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Miguel-Avina
Contributor IV

Hi, there was a misunderstanding with this request. Please see clarification from the customer below:

"

My question is in regards to the LX2160A PMBus driver capabilities when using PMBus Direct VOUT_MODE.

I'm looking to see how the driver deals with the coefficients, m, b & R.  Are they fixed during set up or can they be changed on the fly?  I want to verify the selected power supply is compatible.

Attached is a page from the PMBus Protocol Spec.  I haven't found anything in the NXP documentation that explains the PMBs operation.  

Also, this from the LX2160A datasheet

MiguelAvina_0-1658754788243.png

How does the value stored in the Fuse Status Register get configured to a format usable by a PMBus device and get transferred?

"

Kind regards,

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guoweisun
NXP TechSupport
NXP TechSupport

Unfortunately for the  LX2160A  part questions you need submit ticket to  LX2160A  support team.

Here only support the PMIC side questions.

Home (nxp.com)

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guoweisun
NXP TechSupport
NXP TechSupport

Do you mean the DVS speed selection for SWx of VR5100?

If yes,it can be changed by setting as below picture:

guoweisun_0-1658383690262.png

 

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