PWM, H-Bridge and NCO - PIC16F18446

[Ioannis]

The above seemed too complicated.

I think I better use this design route:

1. Use an PWM, NCO, CWG, CLC capable MCU like the ...K42 one. These chips may drive the PWM signal to the desired pin, so I can control the H-Bridge operation at will, according to the needs of the load.

2. On the H-bridge use Gate the IRS2890 driver that has also current limiting capability.

3. Use the MCU to control the upper Mosfets of the bridge as PWM to regulate the voltage required to the load

4. Use the MCU to control the lower Mosfets of the bridge to control the On/Off of the 0-50 Hz signal

On the above scheme, CLC may not be needed.

On Monday I will order the required parts to assemble a prototype. Though it will be mostly on air I hope it will work good enough to verify the idea.

Unfortunately the IRS2890 is available only in SMD but anyways...

Have found MosFets that should cover the SOA that is needed.

Any ideas welcome,
Ioannis

[amgen]

what is the voltage and current you needed to supply the bridge??

[Ioannis]

It will be between 20-25 Volts.

Load max 10-12Amps.

At low pusling frequencies, obviously the 19mH coil will be more like a low ohm resistor, so the current will be limited.

Ioannis

[amgen]

there are a bunch of these types of things with your I and V range. Thats why I was wondering if your voltage was like 200+ volts or 50-80 amps.
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[Ioannis]

Wow!!! Amazing module! 40amps DC at 85 degrees? Can't believe it!

Many thanks for this.

Ioannis

[amgen]

just a thought too..... it is a lot of technology for the price, but sometimes these types of things, probably from China don't meet expectations.... but sometimes they are good!!!

[Ioannis]

You are right regarding the unknown chinese parts.

I tried to find the specific chip but seems it is too old and stopped production by Infineon.

Maybe they produce other, newer chips now. Have to search.

Thanks anyway,
Ioannis