![]() 25mA its not fully on making my leds dim? Could you please explain little more what you meant by that? One is barely on (250uA = 0.25mA), the other is full on (9A). This cannot possibly be logic-level, not even slightly. ![]() So seeing that threshold voltage of 2-4V for the IRF3710 immediately rings warning bells that ![]() Very roughly 3 times the threshold voltage. With silicon MOSFETs designed for switching (nearly all of them) you can simply make theĪssumption that Vgs=0V for off, completely ignoring the threshold voltage.Īfter a while reading datasheets you'll notice that the minimum gate-drive voltage tends to be You want to avoid (other than to swiftly pass through during switching on / switching off). On-voltage and the threshold voltage is the region where the device is half-on-half-off, a state Its not, its where the device turns fully off. Many newcomers make the assumption that the threshold voltage is something to do with a If you want to drive a MOSFET from 3.3V logic then you'll need a device with an even lower VgsĮntry, and these are almost invariably surface-mount devices, not TO220. Vgs=4.5V for a logic-level device, and Vgs=10V for a 12V device. Then the device is not logic level and cannot be used direct from 5V logic. If there isn't an entry at or below Vgs=5V Voltage (Vgs) and a drain-source resistance (Rds(on)). It will have one or more entries with a gate-source ![]() The on-resistance specification is the one to go to. ![]()
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