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LMR14020: If the low side mosfet becomes open circuit,then how the regulator will behave

IRBAZ RASHID68
Prodigy 50 points
Part Number: LMR14020

I am working with LMR14020, it has internal two mosfet, high side and low side.

If the low side mosfet becomes open circuited,then how will the regulator will behave

  • 0
    TI__Mastermind 27470 points

    Hi 

    LMR14020 is asynchronous DCDC converter, the low side is only used for charge the boot cap, it will only turn on for a very short time. if low side mosfet is open, it will not affect the conerter in normal operation. but if the converter work at no load condtion, the boot capacitor will not be charge enough , make the high side mosfet keep turn off. 

    thanks

    Daniel Li