AnsweredAssumed Answered

ADUM4223BRWZ

Question asked by FreddyS on Aug 2, 2015
Latest reply on Aug 3, 2015 by RSchnell

Dear Supporter

My customer is facing some problems using the ADUM4223BRWZ to drive 2 buck mosfets.
Please refer to schematic below.

Our drive need 40mA RMS, the fuse F1 and F2 are 250mA.
BUCK_DRIVE_1, BUCK_DRIVE_2 are 10V.

Problem: In some cases I got burned fuse and burned IC.

Sometimes the 13V side is damaged and sometimes the 3.3V side is damaged.

 

COM signal is the ground of side 1 (3.3v side F2) 

-VCF signal is the ground of side 2  (13v side F1)

I haven't found any abnormalities during my tests.

Thanks

Freddy

 

 

 

Outcomes