| Electronics > Projects, Designs, and Technical Stuff |
| Over driving a boost converter input |
| << < (4/5) > >> |
| Yansi:
Use different inputs for each? ;D |
| ali_asadzadeh:
--- Quote ---Use different inputs for each? ;D --- End quote --- It's not viable for this product! :-X |
| T3sl4co1l:
This product isn't viable. :P Tim |
| Zero999:
--- Quote from: ali_asadzadeh on February 10, 2019, 06:26:32 am --- --- Quote ---Silly question... You say you want the output to be 340V if input is 340V (220V AC). So couldn't you just bypass this whole circuit in that case? --- End quote --- There is no dumb question ;D how do you boost 12V to 60v and also bypass 340VDC in a circuit automatically then? --- End quote --- How about using an external power supply and connect it directly to 12V if necessary? What does the project do? How much power does it use? Are you sure the SMPS actually requires 340VDC? Quite often a much lower voltage can be used. I've run Rigol oscilloscope directly from 48V before and it works down to 32V, even though it's designed for 100V to 250V operation or is 60V the minimum voltage? If you could design a boost converter which will convert 12V to 60V, but will withstand 340V and do nothing when the output voltage exceeds the set output, then it's workable, but still not good design. It's better to use separate connectors or an external power supply. There should never be 12VDC on a mains connector or worse 230VAC on a 12V connector. One might think 12VDC into a mains appliance will do no harm and with many devices it won't, but it can destroy inductive loads such as motors and transformers, especially large ones if the 12V supply can supply a high current. Motors and transformers have a low resistance to DC, so will pass far more current at 12VDC, than 230VAC 50Hz, which can cause overheating and smoke. |
| ali_asadzadeh:
--- Quote ---If you could design a boost converter which will convert 12V to 60V, but will withstand 340V and do nothing when the output voltage exceeds the set output, then it's workable, but still not good design. --- End quote --- I think this way is my best option. :) Please do not tell me to use separate connectors and why I wanted to do this in this way! it's the customer requirement, not my decision. |
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