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TPS6594-Q1: Buckn_VOUT_n

dcy
Intellectual 370 points
Part Number: TPS6594-Q1

Hi  TI experts:

We find the have two output setting for each Buck, how to understanding this setting?

and what are the usage of the BUCKn_VOUT1 and BUCKn_VOUT_2?

  • 0
    TI__Mastermind 49151 points

    Hi, Mr. Yuan,

       All of bucks on the TPS65941-Q1 device support AVS and DVS voltage scaling changes. Once the AVS/DVS voltage value is written into the BUCKn_VSET1 or BUCKn_VSET2 register, and the MCU sets the BUCKn_VSEL register to select the AVS/DVS voltage, the output of the buck will maintain the AVS/DVS voltage level instead of the default voltage from NVM until any one of the following event occurs:

    • Error that causes the device to re-initialize itself through a power cycle after reaching the SAFE RECOVERY state
    • Error that causes the device to execute warm reset
    • MCU configures the device to enter the LP STANDBY state

  • 0 in reply to Phil Yi
    Intellectual 370 points

    Hi  Phil

    1.If the BUCKn_VSET1 is for AVS and BUCKn_VSET2 for DVS?

    2.if both of BUCKn_VSET1 and BUCK_VSET2 are setting for AVS?

    3.While the BUCK1 was used to AVS mode, how to set the  BUCKn_VSET1 and BUCKn_VSET2?

    4.While the BUCK1 was used to AVS mode for CPU CORE power supply,what is the adaptive voltage range of the BUCK1?

    Thanks a lot!

  • 0 in reply to dcy
    TI__Mastermind 49151 points

    Hi, Dechun,

    A1: No, both AVS/DVS need 2 different voltage levels, the BUCKn_VSET1and  BUCKn_VSET2 are used to setup these 2 different voltage levels. 

    A2: Between DVS and AVS, the primary difference is that the former has an open loop control architecture whereas the latter is closed-loop. That is, in AVS there is direct feedback between the performance of the chip and the voltage provided to it. 

    A3: Answered by A2. 

    A4: The adaptive voltage range depends on application and its processor specs. 

  • 0 in reply to Phil Yi
    Intellectual 370 points

    Hi, Phil,

    A1: No, both AVS/DVS need 2 different voltage levels, the BUCKn_VSET1and  BUCKn_VSET2 are used to setup these 2 different voltage levels. 
    What is the purpose of using 2 different voltage levels? For up limition and low limition? or other purpose?
  • 0 in reply to dcy
    TI__Mastermind 49151 points

     Hi, Dechun,

       The purpose of using 2 different voltage levels is to reduce unnecessary power usage and heat generation when system is not running in high performance status for higher system efficiency and longer battery life. 

  • 0 in reply to Phil Yi
    Intellectual 370 points

    Hi Phil

    Thanks a lot！

    Dechun

  • 0 in reply to dcy
    TI__Mastermind 49151 points

    Hi, Dechun,

      If you think your questions have been answered, would you please close the thread from your side?

  • 0 in reply to Phil Yi
    Intellectual 370 points

    Hi Phil

    OK, Thanks a lot.

    Dechun