| Electronics > Beginners |
| Can I build an AC/DC SMPS in 1 month? |
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| KEIN NEIN:
--- Quote from: pigrew on May 06, 2019, 07:18:22 pm --- --- Quote from: KEIN NEIN on May 06, 2019, 06:52:49 pm ---or a buck converter maybe? --- End quote --- My suggestion would be to build a 5V to 3.3V buck converter, using Arduino to implement the PWM & feedback loop. You would need a few capacitors, resistors, an inductor, and diode (maybe a second MOSFET, too). Perhaps use a pMOSFET as the pass transistor (but a BJT could work, too). -Nathan --- End quote --- thank you Modern buck converters use two MOSFETs for syncronous rectification right? I didn't know I could do that with arduino, where can I find more info on that? |
| pigrew:
--- Quote from: KEIN NEIN on May 06, 2019, 07:39:39 pm ---Modern buck converters use two MOSFETs for syncronous rectification right? I didn't know I could do that with arduino, where can I find more info on that? --- End quote --- Yes, synchronous rectifiers use a second MOSFET to improve efficiency (to avoid diode losses). You can just look at the wiki page for buck converters for help. Building a synchronous rectifier is difficult, and I would suggest making one using a Schottky diode first. I've never used Arduino (except for my 3D printer), so I don't have any good references for you to look at. However, you'll be needing to make 50~200 kHz PWM, which is certainly within the capabilities of most microcontrollers. Getting the feedback loop right may be tricky. I'd suggest starting with doing analog simulations of the inductor+transistor to see how they respond. |
| KEIN NEIN:
Understood, let me see |
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