Query - Selecting SEPIC converter with Over Current Protection.


I am looking for an SEPIC converter to generate an output of 28VDC/3.5A from an input of 20 - 33VDC.
As listed in below table, during over current  condition both LT3759 & LT3796 output got regulated to an lower value. Please suggest an converter that can cut-off the gate output during output OC conditions.
Protections LT3759 LT3796
Input Over Voltage No FB2 pin shall be used for either inrush current limit or OV limit threshold
Input Under Voltage Yes Yes
Short circuit Yes Yes
Over Current No No
Inrush Limit No Yes
Sadham Husen S.
  • 0
    •  Analog Employees 
    on Apr 9, 2021 11:44 PM

    Hi Sadham,

    LT3759 as a SEPIC can protect against over current conditions, but will not completely cut-off the gate. It looks like the LT3796 can shut-off gate under over-current conditions when the sense voltage (current sense pins) goes above a certain voltage. We have LTspice in both these parts that you can try to play around.