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LM5143-Q1: light mode questions & PSPICE model

Benjamin Zhou
Expert 4000 points
Part Number: LM5143-Q1

Hi team,

   My customer now is using LM5143-q1, and they have some technical questions on light mode, could you kindly help on below items?

  1. Now the slave FB is connect to GND,  and while in light load, how the master and slave worked?  Only master worked or both master and slave worked during light load?

  2. What’s it load set point to get into light-load mode?

  3. What’s the typical work mode for light-load mode, like the PWM control logic?

  4. If the load increased from light-load, how the PWM worked during the switching process?

 Another question is that the PSPICE model provided in website seems not worked in customer side, could you also give comments?

 

Expect for your kindly reply, thanks.

 

Best Regards

Benjamin