Introduction: OPTO-MOSFET Driver

Included are the following: High side toggle switch driver, low side toggle switch driver, bipolar NPN transistor driver, Darlington transistor driver, N-Channel MOSFET driver, and ULN2003 driver. You may recall the TLC555 Relay Driver Circuit that I recently posted, it too is a low side driver.

Hi. My absolutely first enclosure to MOSFET’s. After studying ”lot’s” of them in INSTR. & Arduino & elsewere of them users having problems with controlling them mosfets with logics.
Problems there seems to be:

1. To get a proper Volt-level to the gate from logics.

CoolROM.com's search results and ROM download pages for Dragon Quest 9. CoolROM.com's game information and ROM download page for Dragon Quest IX - Sentinels of the Starry Skies (Nintendo DS). CoolROM.com's game information and ROM download page for Dragon Quest IX - Sentinels of the Starry Skies (Nintendo DS). Dragon quest 9 cool romance.

2. To get a NON-inverting output to the fet

3. To NOT use the same power-rail to both logic & load

4. To have a simpel, (few components), solution to all above.

I rigged up my own suggestion to try to solve these problems.

And voilá, it worked like charm, (my first mosfet connection ewer).

I attach here the schematics and them data of the optocoupler and the Mosfet i used. Keep in mind: My solution is just for guidelines for anyone to use. There are 100’s of different kind of optocouplers, so that’s why I don’t here go closer to the specs, same goes for the Mosfet.

The principal idea is that when the switch, (or logic), is LOW, the optocoupler LED is ON.

The ultimate source of patches & addons for Prince of Persia: The two Thrones. Prince of persia (2008). Prince of Persia: The Two Thrones - game update - Download Game update (patch) to Prince of Persia: The Two Thrones, a(n) adventure game, added on Friday, January 6, 2006. File type Game update. File size 20.4 KB. Last update Friday, January 6, 2006. Downloads 34829. Downloads (7 days) 201.

R1 is the LED current limitor resistance, (you need to dimension it to your own demands).

The output is now ON thus giving 0V at pin 8 to the GATE

With the switch, (or logic), is HIGH, (or no potential at all), the output at pin 8 is OFF. Now the VDD, (your ”load” voltage), to the GATE goes via R2, voilá.

The resistor R3, (optional), is there for a voltage-divider. This is if your load voltage ower-rides the volt-level to the gate allowed, (e.g. load volt > 15V).

I haven’t tested my circuit with any heawy load’s yet. Only with 20V/ 500mA. The mosfet was colder, (after 15minutes ON), that my finger, (couldn’t get any warmth at all), There’s a ton of details to concider, delays…. etc.

Keep in mind: this is ”just” a guide-line for that I tested of curiosity them Mosfet’s

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: The Schematic Picture

There are 2 totally independent channels for them MOSFET’s,
including the Power-rails and separate fuses. Use them switches 1,2 to choose the MOSFET to be active either with a LOW or HIGH level from the logic, respectively.

Step 2: PCB Layouts

The layout is double-sided. The complete Design is in ”Gerber form” in the ZIP-file

Attachments

• FET IRFZ44N.pdf

Step 3: Component Side Copper

Step 4: Solder Side Copper

Be the First to Share

Recommendations

• Arduino Contest 2020

• First Time Author Contest

• Space Challenge