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LAUNCHXL-F280049C: How to use Control PIN in PMBus module

lei li
Intellectual 375 points

Part Number: LAUNCHXL-F280049C

Hi,

  How to use Control PIN in PMBus module? Can you explain it and give me an example?

Thanks!

  • 0
    TI__Guru 55700 points

    The CONTROL signal is a hardwired on/off signal. The signal name “control” was chosen because many power supply manufacturers were already using signal names like ENABLE or REMOTE ON/OFF.

    The CONTROL signal can be configured to be active high (CONTROL pulled high to start the converter) or active low (CONTROL pulled low to start the converter) by using the ON_OFF_CONFIG command.

    One use of the CONTROL signal is as an emergency off signal. Under normal conditions, the converter would be turned on and off over the bus using the OPERATION command. In the case of a system fault requiring the system to be powered down immediately, the CONTROL signal could be set to the “Not Run” or “Off” value to cause all converters to turn off or start their power down sequence immediately.

    Another use of the CONTROL signal is to synchronize power up (or power down) sequencing. First, startup delay time and output voltage rise time of all the converters in the system are configured using the TON_DELAY and TON_RISE commands. Then the converters are configured to start when the CONTROL signal is asserted (active high or low as configured with the ON_OFF_CONFIG command). Asserting the CONTROL signal provides a simultaneous “Start” signal to the converters.

    coutesy: pmbus.org/.../