Other Parts Discussed in Thread: LM5118
Good Day,
I have the controller set at 14 V, 300 kHz, 123 ms of soft start, undervoltage threshold at 4.5 V.
The input voltage comes from a generator that outputs a rectified dc voltage of around 20 V (depends on the speed), but can not supply much current (around 500 mA).
The output of the controller goes to a 3 series lithium cell battery charger that is set at 3 A.
The controller supplies the battery charger with 14V, and at a determined speed of the generator, a pulse of 8 ms of 1 A goes to charge the battery, then the controller voltage drops too much and it begins a soft start of 123 ms, then another pulse of current, and so on.
After a minute or two of operating this way, the controller is damaged and only outputs 3.7-4 V with some ripple. I power off and on the controller, supply with a power supply instead of with the generator, but it only outputs 4 V. If I replace the controller, the new one works again, but is damaged the same way after some minutes.
Here is the schematic, please help me to understand what I am doing wrong:
