12v to 24v boost converter with 10-15a of current

[aq_mishu]

Guys,
I need a boost converter that could deliver 10 to 15amps of current at 24v, constantly.

Now we can max get around 1a. Any ideas for such. Large current??

Mishu.

 

[Anna Conda]

A discrete design using a boost control IC, 40A mosfet, 100V rated, 45V 30A schottky diode, suitable choke, o/p caps, input filtering, heatsinking...

) AC

 

[BradtheRad]

Consider interleaving 2 or more boost converters.

 

[mtwieg]

Interleaving is definitely effective for >100W designs. Recently I designed a two phase 28V 400W boost using a LTC3787 controller, it worked well with efficiency >95%.

 

[aq_mishu]

Interleaving is definitely effective for >100W designs. Recently I designed a two phase 28V 400W boost using a LTC3787 controller, it worked well with efficiency >95%.

Guys,
Forgot to tell you the big part, here in my country, i dont have any special ics. I can use uC for pwm and monitor for feedback. But above all, how should i achieve high current? Currently we are getting max 1.25 Amps at output.

Also, what is the meaning of interleaving here?? Cnfused...


Mishu.

 

[BradtheRad]

Here is a simplified concept of a quadruple interleaved boost converter.



The load receives 24V at 15A. (I made an assumption that the supply is 12V.)

It is about 85% efficient (in theory).

You would probably use mosfets for the switches.

You would need to join several capacitors, because there will be over 6 A going back and forth through them continually.

 

[aq_mishu]

Here is a simplified concept of a quadruple interleaved boost converter.



The load receives 24V at 15A. (I made an assumption that the supply is 12V.)

It is about 85% efficient (in theory).

You would probably use mosfets for the switches.

You would need to join several capacitors, because there will be over 6 A going back and forth through them continually.

Dear sir, this looks interesting. Can you describe a bit more on this? Or some link? I googled and found nothing. It looks paralleling them, but why multiple cloks?? Its not like exact paralleling... So bit curious...

Mishu.