carpenter
Full Member level 6
I need multichannel (4x) electronics load and thinking about simple conceps.
I want what a simple concept, my idea see pic.
One big N-mosfet + current shunt, one difference amplifier U1B for amplifies voltage from current on shunt, output drive U1A and ADC in any ARM-CortexM3
Voltage in measure second difference amplifier U2B , output drive ADC in any ARM-CortexM3.
ARM-CortexM3 over 1MSPS DAC drive U1A, in CC mode load drive in full analog controll loop , in CV and CR in controll loop is digital over DAC output.
It's a big nonsense?
2 Choice of transistor
need load to 100V, 250W on chanell I search high power MOSFET, I find FDA50N50 500V 105mOhm 625W
Secon choice will be any in SOT-227 , I thing big case better heat dissipation over heatsink,
IXFN55N50 here was why have IXFX IGBT schematics mark?
or IXKN75N60C
600V 75A 36mOhm, unfortunately datasheet is quite auspicious austere .
My question
How much is the SOT227 case more suitable than TO-3PN?
XKN75N60C if big silicon and have big capacitnce , how big the problem it is with a given method of control and use?
**broken link removed**
I want what a simple concept, my idea see pic.
One big N-mosfet + current shunt, one difference amplifier U1B for amplifies voltage from current on shunt, output drive U1A and ADC in any ARM-CortexM3
Voltage in measure second difference amplifier U2B , output drive ADC in any ARM-CortexM3.
ARM-CortexM3 over 1MSPS DAC drive U1A, in CC mode load drive in full analog controll loop , in CV and CR in controll loop is digital over DAC output.
It's a big nonsense?
2 Choice of transistor
need load to 100V, 250W on chanell I search high power MOSFET, I find FDA50N50 500V 105mOhm 625W
Secon choice will be any in SOT-227 , I thing big case better heat dissipation over heatsink,
IXFN55N50 here was why have IXFX IGBT schematics mark?
or IXKN75N60C
600V 75A 36mOhm, unfortunately datasheet is quite auspicious austere .
My question
How much is the SOT227 case more suitable than TO-3PN?
XKN75N60C if big silicon and have big capacitnce , how big the problem it is with a given method of control and use?
**broken link removed**