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MOS Driver of Buck Converter for Charge Controller

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M.Rehan

M.Rehan

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How to get drive signal for mos in given scenario
using bootstap circuit (ie using High Side MOS driver (IR 2110)) using Battery Supply(ragulated to 12V)
I know Bootstap circuit works but given scenario confused me

SPECs:
MOS driver used IR2110
Power to Mos driver:12 V regulated from same battery of 36V

Capture.PNG
 

Easiest and least trouble prone way is probably to use an isolated 12v dc to 12v dc power supply.
These are available on e-bay for just a few dollars.
 

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Its not a practical and economical :p

Charge controller in Market what they are using?
Like CM5024 solar cahrge controller
 

you couldnt even put the boot cap there,and a big resistor from it to gnd, so that the cap got charged up enough for you to get started.......because the batt voltage will put an end to it...so Warpspeeds solution looks good and ripe for use. Try to pick a module with as little capacitance as poss across its isolation barrier.
 
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    M.Rehan

    M.Rehan

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The 12v to 12v isolated power module may look like overkill.
But its absolutely foolproof.

Any other way is fraught with unexpected problems that can be quite difficult to get around under all possible operating conditions.

Solar control systems can be particularly problematic around sunrise and sunset.
 
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    M.Rehan

    M.Rehan

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If you are using Dc to DC converter in gate drives, be aware of common mode dV/dt....Recom do some modules that are designed for get drive use. I have used these on a large Inverter I designed a couple of years ago for s customer with excellent results.
 
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    M.Rehan

    M.Rehan

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brushhead said:
I have used these on a large Inverter I designed a couple of years ago.
Click to expand...
Can You share further details and expereince about inverter and common mode dV/dt
 
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    T

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Well the DC link voltage on this inverter was rated at over 700V, and the IGBTs I was using were quite quick so it would have been running at about 1400V/us. The key parameter (as has been mentioned elsewhere I think) is the inter boundary capacitance between the hot and cold side. The faster the dV/dt, the greater the capacitive current between the two sides. If this becomes excessive then this can lead to failure of the insulation, which obviously is a disaster. This was just a large AC drive.
 

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