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TPSM8D6C24: Latest fusion version and ADRSEL

Kazuki Itoh
Genius 9165 points
Part Number: TPSM8D6C24
Other Parts Discussed in Thread: , TPS546D24A

Hi team,

1. Could you provide FUSION_DIGITAL_POWER_DESIGNER v7.7.3.4 which is used in TPSM8D6C24EVM-2PH user guide?

As the latest available version v7.7.1 doesn't directly support TPSM8D6C24, I would like to check the design with it.

2. I'd like to use TPSM8D6C24 with standalone (1 chip) and 2 phase.

What is the recommended SYNC setting? Is it 180deg (in/out)?

I checked DS 7.5.2.4, but I don't get the recommended setting.

Regards,

Itoh

  • 0
    TI__Mastermind 48140 points

     

    Kazuki Itoh said:

    1. Could you provide FUSION_DIGITAL_POWER_DESIGNER v7.7.3.4 which is used in TPSM8D6C24EVM-2PH user guide?

    As the latest available version v7.7.1 doesn't directly support TPSM8D6C24, I would like to check the design with it.

    FUSION DIGITAL POWER DESIGNER V7.7.3.4 is not a public release.  Native Support for the TPSM8D6C24 will be included in a future release.  In the mean time, I will e-mail you a link to a beta version which supports the TPSM8D6C24.

    Version 7.7.1 can be used but will recognize the TPSM8D6C24 as one or two TPS546D24A devices depending on the stack configuration.

    Kazuki Itoh said:
    2. I'd like to use TPSM8D6C24 with standalone (1 chip) and 2 phase.

    I am not sure what "standalone and 2-phase" refers to.

    If using the two channels of the TPSM8D6C24 module as two separate outputs, it is recommended that that one of the channels be programmed for SYNC_OUT and the other SYNC_IN to prevent a conflict on SYNC when enabled.  The phase relationship of the two channels can be controlled by the ADRSEL resistor divider selection of the SYNC_IN device.

    If using the two channels of the TPSM8D6C24 module as a single output, the phase position of the two devices will be handled by the STACK programming on MSEL2 pins with no additional programming of ADRSEL required.  If external SYNC will not be used, it is generally preferred to select an ADRSEL divider which selects SYNC_OUT rather than Auto-detect.  While Auto-detect is useful in a system that may or may not be synchronized externally, it delays the SYNC_OUT function until the primary device in the stack is enabled while selecting SYNC_OUT will enable the SYNC function as soon as AVIN power is applied and power on reset is complete.

  • 0 in reply to Peter James Miller
    TI__Genius 9165 points

    Peter-san,

    My customer is using the two channels as a single output.

    In case MSEL2_A is floating and MSEL2_B is grounded, it automatically sets the phase offset as chA=0 degree and ChB=180 degree regardless of the RDIV code of ADRSEL_A/B, correct?

    Regards,

    Itoh

  • +1 in reply to Kazuki Itoh
    TI__Mastermind 48140 points

     

    Correct.  The ADRSEL divider only sets the phase position when a channel is used as a stand-alone single phase via its MSEL2 or GOSNS/FLWR programming.  If MSEL2 or GOSNS/FLWR selects a multi-phase stacked configuration, the phase position is controlled by the Stack configuration and the ADRSEL divider phase position is ignored.