The current draw of the load and type of load is the key. There may be more suggestions, I didn't look over it that thoroughly. Inherently fast switching speed of these devices can be. A 10k pulldown at the mosfet gate to ground isn't a bad idea either. The power MOS field effect transistor (MOSFET) evolved from the MOS integrated circuit technology.
MOSFET IPULSE SPEAKER DRIVER DRIVER
I would change the resistor before the led to 150-300Ohm and have some more decoupling around the voltage regulator ( see datasheet). A MOSFET driver is a type of power amplifier that accepts a low-power input from a controller IC and produces a high-current drive input for the gate of a high-power transistor such as an Insulated-Gate Bipolar Transistor (IGBT) or power MOSFET. The circuit that you have isn't a bad start. The flyback diode should be across the load too. They both won't turn on properly at 5v gate drive and the irfp260N will not switch fast enough without a totem pole driver because it will take to long to charge the gate. The buz11 and irfp260N are not logic level. If you want faster/more efficient switching you need a MOSFET driving chip to charge/discharge the gate capacitance quickly (drivers are usually 0.2 to 1A or so). If you are only switching a small load and can use a mosfet with a small gate charge ( <20nC) then you might be able to use a single LOGIC LEVEL mosfet. If you are driving a mosfet with big gate charge ( greater than 50nC) then a totem pole is a suitable way to attain the switch frequency you need (20-40khz) unless you use a driver IC. We really need to know the current draw of the load too in order to suggest something. Or if they know of circuits of this type. Tell me if it's okay or that arrangement would recommend. The LM317 I've added is because I think power loads 12V-32V so a greater than 20V voltage on the gate would damage the mosfet so I have regulated 10V I searched on the internet and recommend settings "Totem Pole" as shown in the diagram. I'm looking to make a driver to control power mosfet with a pwm signal (20-40KHz) approximately.
0 kommentar(er)
