Other Parts Discussed in Thread: LM5143, , CSD18563Q5A
Hi,
The DCDC LM5143 is used for the main power supply.
The reference design is based on datasheet "8.3.17.2 Single-Output Interleaved Operation",the spec. as below:
1) Input voltage is 48V;
2) Output voltage adjustable, 42V MAX., use the potentiometer for the voltage adjust;
3) Output constant current 25A;
4) We use the 200KHz frequency, and modify the LO1 and LO2 from 0,68uH to 10uH;
4) The MOSFET is Infineon BSC123N08NS3G(80V, 12.3mohm, 5*6 package);
Now, we have below issue for the design:
1) The highside MOSFET broken down with load when the power on;
2) The highsiede MOSFET broken down without load when adjust the potentiometer from 0V to 42V;
Please refer to the schematic diagram and share your comment, thanks.