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LM5067: Design Related : Output pin Issue

Shivam Kanoria
Prodigy 10 points

Part Number: LM5067

Hello, 

I am designing a circuit in which I have connected the drain of MOSFET to Out pin of LM5067 as suggested in datasheet.

Circuit is attached for the reference..

image.png

What I have observe is 

  1. My load (Pure Resistive) is not getting ON untill I Disconnect Load and reconnect it after turning ON(Need to turn ON circuit then need to connect Load)
  2. During any fault condition i.e. UV,OV,Overload, Froceful truning OFF using Transistor at EN, it turns OFF but does not auto restart(on observing waveform on Timer pin I get to know it goes 0.3V after 8 cycles but does not restart, gets stuck in the same loop)
    Solution what I have to do is agin disconnect the load and need to connect.
  3. When I disconnect the Drain pin of MOSFET with Out Pin of LM5067 is works fine but again datasheet says need to connect for softstart during inrush.

 

Can anyone help me out what can do in this case.

Do let me know if anyone required more details regrading the test cases.