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TPS65286 MAX Duty cycle

Kuo Nowal
Expert 2315 points
Other Parts Discussed in Thread: TPS65286

Hi Sir,

May I know TPS65286 how calculate MAX Duty cycle? because we can't find Toff(min).
 

  • 0
    TI__Mastermind 18510 points

    Hello..

    Theoretically, it can get 100%, BUT there is limited condition. please refer to 8.2.9 in DS.

    To improve drop out, the device is designed to operate at 100% duty cycle as long as the BST to LX terminal

    voltage is greater than the BST-LX UVLO threshold which is typically 2.1 V. When the voltage between BST and

    LX drops below the BST-LX UVLO threshold the high-side MOSFET is turned off and the low-side MOSFET is

    turned on allowing the boot capacitor to be recharged.

     

    Regards,

    yuchang