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low power to control high power

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amsm

New Member
I need to use a 5V, 40mA signal to activate a 25V, 10A H-bridge circuit. Is there some kind of high-power logic buffer out there for this kind of difference?
 

crutschow

Well-Known Member
Most Helpful Member
What signals does the H-bridge require?
 

tcmtech

Banned
Most Helpful Member
Standard issue high/low driver IC. I use IR2110 IC's and they can drive 1200V 600 amp IGBT's using a 3.3 or higher logic level input.
Driving Mosfets or IGBT's to switch 25 volts at 10 amps would be no problem for them!
 

amsm

New Member
What signals does the H-bridge require?
My H-bridges use the 490 hertz PWM signal from an Arduino microcontroller.

I use IR2110 IC's and they can drive 1200V 600 amp IGBT's using a 3.3 or higher logic level input.
Thanks, Tech, I'll read up on that. A quick search hasn't given me a source yet, except Digikey.
 

tcmtech

Banned
Most Helpful Member
The IR2113 is the higher voltage version. Most any high/low drivers should work though.
 

amsm

New Member
Logic level mosfets can easily accomplish this task
Which one would you recommend?

490Hz is audible, why not use below 40Hz or above 18000?
I think the PWM frequency can be altered on the Arduino. Good point! I hadn't thought of that!
 
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tcmtech

Banned
Most Helpful Member
I would go with birdmans idea first. the IR2110 are best suited to high gain transistors and voltage controlled devices like Mosfets and IGBT's.
Given the low cost of logic level Mosfets in the 60 volt 10 amp range they would be a far better choice.
 

amsm

New Member
Sorry, I edited my last post because I just got what birdman was saying. Been a really bad day. Bear with me...
 

amsm

New Member
Holy cow! They're less than a buck at Digikey! They're like ten bucks locally! Maybe I'm reading this wrong...
 

birdman0_o

Active Member
I would recomend one rated for >50V and > 20A might as well double your requirements :)
I can't do all the work for you find a part and we can have a look
You will need both N-channel and P-channel
 

amsm

New Member
Look up a H-brige mosfet circuit.
N-channel is tied to ground and P-channel to V+
N-channel should be pulsed with the PWM because they generally have a lower Rds
So you recommend replacing the 3055 H-bridges with MOSFET H-bridges?
 
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