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Constant current boost converter

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ebunny

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Hello everybody,

I am trying to design a dc/dc boost converter with constant output current.

Vin = 12 V

Vout = 16 V
and Iout = 65 A

1) I was reading about continuous conduction mode (CCM) and discontinuous conduction mode (DCM) but I am not sure
which it is better for this application.

2) Considering the high current level, to achieve a decent efficiency, it is fine to go with a single dc/dc? or it would be better to go interleaved? if it is the case, which are the drawbacks?


Thank you very much,

eB.
 

Prototyp_V1.0

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In this request, constant current doesn't make any sense since you've already defined a fixed output voltage.
 

ebunny

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Prototyp_V1.0,

Thanks for giving me the opportunity to clarify my question.

Output Voltage has only limitation in his Vmax=16V, so I guess it can go 0-16V.
I just need the fix output current, I=65A.


Thank you very much,

eB.
 

FvM

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Output Voltage has only limitation in his Vmax=16V, so I guess it can go 0-16V.
I just need the fix output current, I=65A.
This means, a regular boost converter can't work, you need a buck/boost converter.
 

ebunny

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This means, a regular boost converter can't work, you need a buck/boost converter.
Thank you,

I would like to know why as well. :)

Any suggestions before I start designing the buck/boost?

Thanks,

eB.
 

RCinFLA

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Sounds like a solar charge controller with PV panel of lower voltage then battery voltage.

If so, you can get by with a basic boost only with the addition of a series MOSFET switch, at the input.

Problem with a boost switcher is the input is always connected to output through the switching coil.
 

ebunny

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I am still confuse,

I have done some calculation and simulation in simulink but it is way far to be correct.
I tried to do a buck converter too so at least the Iout dose not go to zero, but it was not successful.

Please any suggestions?
Thank you very much,

eB.
 

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