555 timer mosfet driver

 · Below is a circuit I put together that uses a timer and an LED Driver: But the strange thing I see is that the timer does not follow the *R*C equation. The led remains lit for much longer. I tested this circuit by removing the MOSFET and .  · The venerable type timer makes an effective driver for power MOSFETs, but you have to understand the drive situation when selecting the correct variation of the basic timer. This idea shows Estimated Reading Time: 2 mins.  · Efficient Flyback Driver High Volts circuit using IC This is an Efficient flyback driver circuit, a good and fairly efficient flyback driver circuit. All parts can be obtained easily from Radio Shack, including the MOSFET. This circuit uses a timer IC to generate a pulse. Then, a 2N gets a frequency as a square www.doorway.rus:

Below is a circuit I put together that uses a timer and an LED Driver: But the strange thing I see is that the timer does not follow the *R*C equation. The led remains lit for much longer. I tested this circuit by removing the MOSFET and triggering pin 2 manually. I get the same effect. This circuit is pretty easy to assemble and works pretty well (for me atleast). The flyback has 20 turns of primary (any scrap wire will do). The circuit works by making the mosfet turn on and off very fast with the help of the timer, the capacitance of the capacitor (on pin 2 of NE and ground) decides the switching speed. A single transistor is probably going to drive the mosfet worse than the itself. If you are need to use a driver between the mosfet and then you are better off with a push-pull (totem pole) driver configuration that can sink/source current equally strong in order to turn on/off the mosfet quickly (again only if needed) or even better.

4 Des The original bipolar timer, the NE, is excellent for driving a power MOSFET's gate. Newer CMOS versions such as the , LMC, and. The timer IC is an integrated circuit (chip) used in a variety of timer, delay, stage with push-pull (P.P.) output drivers that can load the "Output" pin. The gate drive requirements for a power MOSFET or IGBT utilized as a requirement of the IR, the charge pump employs a CMOS version of the timer.