Re: [CAD_CAM_EDM_DRO] Re: Higher power from L298 etc.

Mark Taft wrote:

>HI everyone,
>
>I have recently designed a new board based on the L297,L278.
>
>At present its still on the drawing board, ( to be made and tested)
>
>If it works ok it will run 80 volts at 30 amps or more.
>
>In my search for ideas I found one person who had interfaced the L297 to a
>special Signetics driver capable of running at 600Volts at 50 amps.
>This apparently is a commercial design.
>
>I failed to follow this route as the driver chips are only available in
>large quantities, so I used Fets instead.
>
>Once we have one running successfully the plan is to publish the circuit so
>anyone can use it.
>
>

I used the International Rectifier IR2110 and IR2113 FET drivers in
several projects. They take care
of the level shifting required to drive a high-side FET (or IGBT) in
bridge type drivers. You can get
them from Newark or Digi-Key in single quantity. These drivers and FETs
of the IRF640 series
can make a very cheap, high power driver.

Jon