Hi, I'm in the process of designing the power part for my PWM Led Driver. PWM, MCU basically the digital part is done. I am trying to make around 16 Channels of high current PWM output. Drivers Para Hp Laserjet P1102w. Each channel will be driving around 100 pieces of 5V 0.15W single color LED that I got. I think 200Hz should be more than enough for dimming effect.

I want to drive a strip of LEDs from a microcontroller using PWM to. 12v to the input of a mosfet to control the actual LED. Constant Current Driver. Child S Play 5 Full Movie. Dimming a 12V LED strip with a mosfet and PWM Dimming a 12V LED strip with an N-channel power mosfet is pretty. Adding the bipolar totem-pole mosfet driver. PWM-dimmable single channel LED driver with integrated boost. – High performance external MOSFET driver. The LED6001 device is a LED driver that.

So the mosfet output will be 200Hz/5V/4A(to be safe) I'm very new to analog design and having a hard time deciding which MOSFET. My PWM is rated at 7V/20mA, of course I can change my PWM generator IC to suit the MOSFET's part if needed.

I have read many articles on how to choose a suitable MOSFET but still can't conclude anything yet. And also, do I need a MOSFET driver? I am confused here. Allora And The Broken Portal Set Up Events there. When I need a MOSFET driver and when I don't? When a datasheet says a MOSFET can handle 100V. Does that mean it can handle 5V as well? Or I need to get a 5V Mosfet?

Whether you need a MOSFET driver is determined by the MOSFET gate capacitance and the desired MOSFET output risetime. Generally you want to risetime to be no more than a few microseconds to minimize power dissipation. The MOSFET risetime is roughly (V*Cg) / Idr where V is the desired gate voltage, Cg is the gate capacitance and Idr is the gate drive current. With a 7V drive signal you want to buy a logic-level type MOSFET which can fully turn on with a 5V gate-source signal.

A standard MOSFET typically takes 10V to fully turn on. The MOSFET rating of 100V means it can handle any voltage up to a maximum of 100V. At 200Hz, my hunch is that you don't need a driver because the incrementally more rapid on/off you gain with that will not be an issue for you at 200Hz. I use IRF540N MOSFETS for general purpose stuff, mostly because I have a pile of them. It's current rating is few times greater than would be required for your project, but that's OK and I would look for a MOSFET with maybe ~4X whatever your realistic continuous current level is. Low Rds 'on' is a good thing, as this is what will influence power dissipation in the MOSFET. Over-specifying your MOSFET adds very little to the cost, but you do pay for bigger/better specs.