I plan to use a mosfet in a dawn to dusk switching circuit with a 12V regulated power supply. In the application notes they give the gate source absolute maximum voltage as +/- 10V Gate to Source. (page 1)
On page 6 of the same application note they show a "Gate charge test circuit." with a 12 volt battery between the gate and source with a 50 Kohm variable resistor for the current source circuit.
Aren't they exceeding their own absolute maximum G-SV when the wiper is turned to the +12 side of the battery?
My Circuit is simple with just a photo transistor gate to source and a4-10 megohm resistor to the gate and +12V biasing it on when the photo transistor is dark. The load is a 12V ten watt LED spotlight.
I've incorporated several of these and never had a failure and they've been working outdoors for >5 years and I just now noticed that I'm doing something illegal according to the app note.
As I understand mosfets a G-S breakdown, even through a megohm value resistor, would kill it forever. Is this wrong?