Recently with the Arduino IO collection of 250 hz PWM signal, and then through 0 mouths issued after compared with the same frequency signals of different duty ratio to TLP250, then want to use IRF540N TLP250 direct drive MOS tube, but there is no even TLP250 MOS tube, through a serial port plotter Arduino observation Arduino acquisition frequency has great fluctuation, if you disconnect the Arduino and TLP250 don't have this problem, which is a great god to know why?
Or who used IR4427 driver chip? TLP250 change into this chip is on a few? I would appreciate your high anxious to guide people!

CodePudding user response:

"Disconnect the Arduino and TLP250 doesn't exist the problem" how to understand? Disconnect the Arduino, TLP250 output? Or connect the Arduino, Arduino output without question, TLP250 output waveform exception?

CodePudding user response:

Is I use Arduino serial plotter examines the Arduino is detected by the pulse width, even TLP250 serial ports on the plotter output pulse width is not very stable, but disconnect TLP250 serial plotter output result is very smooth