FL3100 high performance MOSFET driver IC for a TO-252 MOSFET (optionally included)Designed by Azduino by Spence Konde in United States of America
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MOSFETs are the go-to technology for controlling large loads from a microcontroller. While a directly driven MOSFET is fine for low power and/or low frequency PWM and for simple switching, driving th…Read More…
MOSFETs are the go-to technology for controlling large loads from a microcontroller. While a directly driven MOSFET is fine for low power and/or low frequency PWM and for simple switching, driving the gate becomes more troublesome when using large MOSFETs with high-speed PWM. The gate of a MOSFET acts like a capacitor electrically, with the state of the transistor depending on the voltage on the gate. This has two consequences relevant to typical light electronics.
Where these issues are a problem, there's a demand for a way to apply a brief high current pulse to the gate of a MOSFET - this is known as a gate driver. These boards mount an FL3100A gate driver, which can provide up to 2.5A to the gate of the MOSFET, with rise/fall times on the order of 10nS, enabling high speed PWM of large loads. The FL1000A has a logic threshold of around 1.6v (max for high 2V, min for low 0.8V), though it requires at least 4.5v for proper operation and will apply the full operating voltage to the gate with even a low voltage signal. It provides two control pins, and only when In is high, and Dim is low will the MOSFET be turned on.
|In||Non-inverting control||If IN is LOW, FET is off|
|Dim||Inverting control||If DIM is HIGH, FET is off|
This is available assembled with a MOSFET (currently the DMTH8012, up to 80Vgs, up 50A with additional cooling is the only option - other MOSFETs may be added based on customer demand) mounted on the other side, or you can get it without the MOSFET and add the N-channel MOSFET FET of your choice.
Screw terminals are available (installed) for a small additional fee.
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