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Following on from earlier discussions I thought I'd take a look at how easy (or not) it is to use a big MOSFET in a simple set up to switch a 5A load to test power supply transient response:   I used an STW60N10 MOSFET, a 3.3R load resistor, 4 x 4700 uF 100V caps in parallel. The MOSFET is driven from Rigol 1030Z signal generator set to make 20uS pulse at 100Hz rate. I tried it with and without a 100R resistor in the gate. The power supply was 16.5V via  a100R resistor driving the ca ...

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