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The new one is the BTN8982 and is only produced at TO263-7 package.

How do you solder this one on the PCB by hand?

Anyway, have ordered the board that you showed. Hope it is an old stock and...

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...

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

Many thanks for this.

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

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,...

Alain:
The PWM is controlled by a Pot. I could also make a variable power supply and control directly the voltage on a SMPS circuit instead of PWM. More complicated.

Amgen:
It is easier on the...

You are right, I just didn't want to clutter the draw.

Ioannis

Hope this draw clarifies a bit the problem.

Ioannis

9941

Henrik, for a while forget the PWM.

Just think of an H-Bridge that drives a load in two modes:

1. Unipolar voltage on the load with a rate of 0-50 Hz

2. Bipolar voltage on the load with a...

Henrik, I like your idea if can be handled by hardware as I am afraid of software that may hang. Also it gets complicated when you want to control the output as bipolar and have to switch all...

The main task is to drive a load (this is a big coil of around 19mH of thick 2mm wire at 60cm diameter) with:

1. Unipolar, 0-20 volts, pulsating power of 0-50Hz

2. Bipolar 0-20 Volts, pulsating...

Thanks Richard.

Have not used about that module yet. I will have a look at that to see what can do.

Here is a small simulation on LTSpice to describe what I want to do. Please delete the .txt...

The idea: Drive a MosFet H-Bridge with the upper transistors with a PWM output signal (freq of ~1KHz) and lower transistor with a low requency NCO output signal (0-50Hz).

Requirement is to have...