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TPS53622: VBOOT

vikas gupta1
Intellectual 525 points
Part Number: TPS53622

Hi,

I need some info regarding TPS53622:

1) How to set VBOOT voltage through resistor settings ? What value resistor to use ? Or some resistor divider we have to use? Not seen any feedback reference voltage to calculate? Please help.

Do we have a reference schematic, is it shareable?? 

Thanks

Vikas G.

  • 0
    TI__Expert 5830 points

    Hi Vikas,

    1) How to set VBOOT voltage through resistor settings ? What value resistor to use ? Or some resistor divider we have to use? Not seen any feedback reference voltage to calculate? Please help.

    VBOOT need to be set by NVM. There is no resistor setting for VBOOT.

    Please check datasheet for detail.

    Do we have a reference schematic, is it shareable?? 

    Please check application section in the datasheet for detail.

    Thanks.

    Chasel

  • 0 in reply to Chasel Chen
    Intellectual 525 points

    Hi,

    One more info is needed, our Vboot= 1.15 V, and SVID range we say (0.54-1.52) V,  so we can design power supply considering high limit of SVID voltage range i.e. 1.52 V (excluding ripple voltage)? or Vboot is the static voltage always in use and design with reference to it .

    Thanks 

    Vikas

  • 0 in reply to vikas gupta1
    TI__Expert 5830 points

    Hi Vikas,

    SVID range (0.54-1.52)V is the Vout range we can use it for.

    so we can design power supply considering high limit of SVID voltage range i.e. 1.52 V (excluding ripple voltage)?

    Yes, and in VR13 10mV VR mode you can have up to 2.5V Vout,

    or Vboot is the static voltage always in use and design with reference to it .

    Correct it is the initialize voltage that controller targets to power up, and the PMBus Vout limit will be limited by Vout_Max and Vout_Min register.

    Thanks

    Chasel

  • 0 in reply to Chasel Chen
    Intellectual 525 points

    Thanks Chasel.

    Its a dual output , so we can use only 1 SVID for the power supply?

    Also, is there any specfic SVID address TI powersupply required or we can choose any SVID like 0x01H.

    Is thereany register setting to allocate SVID?

    Thanks

    Vikas G.

  • 0 in reply to vikas gupta1
    TI__Expert 5830 points

    Hi Vikas,

    Yes, you can use it as 1+0 or 2+0. SVID address is required by intel, if the application is not for intel, you can select anyone, it will be ok, just need to connect SVID pins CLK/DAT/ALERT to GND.

    Please check datasheet SVID portion to set SVID address. It can be set by NVM or resistor of pin ADDR.

    Thanks.

    Chasel

  • 0 in reply to Chasel Chen
    Intellectual 525 points

    HI,

    Our application is 1+1 , so i assume 1 SVID is capable to handle both the output rails. Also our application we using SVID so PMBus signals we can connect to GND or keep them floating?

    Thanks

    Vikas

  • 0 in reply to vikas gupta1
    TI__Expert 5830 points

    Hi Vikas,

    so i assume 1 SVID is capable to handle both the output rails.

    Yes, by different SVID address setting for rail1/2

    Also our application we using SVID so PMBus signals we can connect to GND or keep them floating?

    If you leave PMBus floating, then you will not be able to check faults/telemetry/programming NVM...etc. Suggest connect PMBus to CPU or any other PMBus host or have a pin header on the board for debugging purposes.

    Thanks.

    Chasel.

  • 0 in reply to Chasel Chen
    Intellectual 525 points

    Hi ,

    On what basis we choose FSW for this regulator?? 

    Can FSW is also programmable through PMBus or SVID.

    Thanks

    VIkas G.

  • 0 in reply to vikas gupta1
    TI__Expert 5830 points

    Hi Vikas,

    On what basis we choose FSW for this regulator?? 

    You can use 600kHz, you can find the factors in application sections in the datasheet.

    Can FSW is also programmable through PMBus or SVID.

    PMBus.

    Please get PMBUS spec from PMBUS org and SVID spec from intel to know the difference.

    Thanks

    Chasel

  • 0 in reply to Chasel Chen
    Intellectual 525 points

    HI Chasel,

    I would like to know one more thing, TPS56322A provides variable run time dynamic output voltage range (0.52-1.24 V). How the controller controlling or sense the need of varying output.

    Is it controlling through Processor or PMBuS or SVID interface?

    Thanks

    Vikas G

  • 0 in reply to vikas gupta1
    TI__Expert 5830 points

    Hi Vikas,

    Please check with datasheet for detail. There is a register to switch SVID control VOUT or PMBUS control VOUT.

    Thanks.

    Chasel