Hi. I was wondering something. THere's a MOSFET that has a switching time of 10ns. THis requires 3A drive current. Now the driver is able to provide 3A of current, however, the rise time of the driver is 125ns.
Does this mean that using this driver is although able to provide the necessary 3A for 10ns switch times, it is unable to meet the current demand quickly enough to make use of it? (ie. the FET turns on long before the driver ramps up enough current for 10ns switching).
It's a choice between a much weaker 3-phase driver IC with matched time propogation delays, or 3 much more powerful half bridge driver ICs. It's for a brushless motor 3-phase inverter and the transistor can switch super fast but I can't seem to find enough drive (although, I guess 30kHz PWM is more than enough...MHz PWM isn't overly useful for a motor...and I almost forgot about how short the wire would have to be to prevent transmission line effects.)
Actually does anyone know how to calculate the wavelength of an electrical signal down a wire given it's frequency?
Does this mean that using this driver is although able to provide the necessary 3A for 10ns switch times, it is unable to meet the current demand quickly enough to make use of it? (ie. the FET turns on long before the driver ramps up enough current for 10ns switching).
It's a choice between a much weaker 3-phase driver IC with matched time propogation delays, or 3 much more powerful half bridge driver ICs. It's for a brushless motor 3-phase inverter and the transistor can switch super fast but I can't seem to find enough drive (although, I guess 30kHz PWM is more than enough...MHz PWM isn't overly useful for a motor...and I almost forgot about how short the wire would have to be to prevent transmission line effects.)
Actually does anyone know how to calculate the wavelength of an electrical signal down a wire given it's frequency?
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