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I took away these key points some of which I already knew:.

There are designs available to do bridges with all N-channel FETs, but it takes extra work to bias up the upper FETs and their gate signals. It all seems very complex and nasty to me, especially when I have complementary FETs available: The IRF is a very common N-channel, capable of 5. I added an IRF in a half-bridge configuration the left half of the circuit belowand from their common drains wired one LED high and another low with resistors, of coursethen tested that the LEDs alternated as I applied a square wave to the gates.


IRF9532 Datasheet

After demonstrating that the half-bridge worked correctly, I built the full bridge shown below, again testing with LEDs.

Now that I think about it, I probably have a series chip with high-voltage open-collector outputs that I could have used in the circuit instead.

A single H-bridge is enough to drive a DC motor; but a stepper needs two, one for each coil. It was late enough, I quit for the evening knowing the bridge was driving LEDs okay, but without testing the motor.

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EL Gammal Electronices IRF

So with the circuit above, if you use only one chip then all the pins would have been used since you have to power the circuit with VCC and Irf95332. Yes, the circuit uses an entire SN per stepper coil or DC motor. The only reason I was experimenting with discrete circuitry was that I had the components on hand. Thanks for the reply Keith. I have a that I can use. Mail will not be published required.


Notify me of followup comments via e-mail. Stepper Motors, Part IV: I took away these key points some of which I already dattasheet Because MOSFET channels are very thin, their junctions are easily damaged by over voltage conditions, not just over power conditions. This is the reason for the standard cautions about static electricity and admonitions to store FETs in conductive bags or with foil wrapped around the leads, etc.

IRF9532 Datasheet PDF – International Rectifier

Read the datasheet carefully to determine which lead the heatsink tab is common with. The Motion None, of course. February 8, at February 12, at February 13, at Leave a Reply Click here to cancel reply.