| Electronics > Beginners |
| A niche chip (LT4320) for mains powered AC -> low volt DC "linear" based psu ? |
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| digsys:
--- Quote from: BravoV --- Which mosfet do you have in mind ? --- End quote --- Parts are ordered from USA. Hopefully 7-10 days max. I have dozens of high power Mosfets in stock. I'll just plug various buggers in and see what happens :-) In one app paper they specify up to 30A parts, so I'm sure pretty much anything will work. Now to do a PCB bridge replacement. |
| BravoV:
--- Quote from: digsys on September 25, 2013, 05:41:25 am ---I'll just plug various buggers in and see what happens :-) --- End quote --- :clap: |
| BravoV:
Interesting brief insight about this chip found in -> Linear Tech. Press Release : Ideal Diode Bridge Controller Minimizes Rectifier Heat & Voltage Loss (PDF) and this chip is just released recently in June 2013, pretty new. Quoting few interesting topics raised by johansen --- Quote ---...<snip>... The LT4320 switch control smoothly turns on the appropriate two MOSFETs, while keeping the other two off to prevent reverse currents. An integrated charge pump provides the gate drive for the external low on-resistance N-channel MOSFETs without requiring external capacitors. The choice of MOSFETs offers the greatest flexibility in power levels ranging from one to thousands of watts. --- End quote --- |
| tszaboo:
I wrote about this chip some time ago, also some considerations, etc... http://nandblog.com/chip-review-ltc4320/ The bottom line is, if you use some linear regulator on the output, it might be not worth it, since you will dissipate the voltage anyway. Sometimes it is useful. |
| digsys:
Update: ICs are here, PCB layout done (based on a H-Bridge layout I did in the past, it should handle 30A - bolted to some Al naturally) It will be 2-3 weeks though until I do a PCB run. Itching to see how it performs. |
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