I am using LM5060 from TI for switching big modular N channel MOSFET in SOT-227 package (IXFN420N10T) for relative high 100-200A loads.
On small loads like 10-20A it was working fine then we tried a bigger resistive load of around 50A and it was working completely fine when first connected when the gate was switched it was opened up and current flew and worked just fine. But then the gate of MOSFET didn't work anymore always opened.
Our schematic is based on the reference from datasheet with added 0.01uF capacitor on the gate.
Maybe someone does know why mosfet get's blown? It supposes to handle 420A and at 50A it blows (not literally but the gate doesn't work anymore)
EDIT: Here is schematic as asked
EDIT2: At first I saw in documentation that Vgate is like 12V so it was within the range, and now I see in further documentation it writes this but I don't really understand if I am understood correctly:
A charge pump provides bias voltage above the input and output voltage to enhance the N-channel MOSFET gate. When the system voltage is initially applied and both EN and UVLO are above their respective thresholds, the GATE pin is charged by the 24-µA (typical) current source. During normal operating conditions, the GATE pin voltage is clamped to approximately 16.8 V above the OUT pin (i.e. VGS) by an internal zener
So if I understood it charges voltage VIN - 16.8V ?