Hi Team,
Can you check for me, TI's SE555, is the OUTPUT driven is a voltage source or a current source?
I read the description in the manual, and it can output a maximum current of 200mA. I understand it means: voltage source, working according to the current demand of the load, and can output a maximum of 200mA. Is it right?
Because I connected a gate circuit in the rear stage, if it is a current source of 200mA, there is a risk, please help to evaluate it. Thank you so much.
B.R.
Lucas
Hi Zhizhao,
Can you check for me, TI's SE555, is the OUTPUT driven is a voltage source or a current source?
The 555 timer's output is voltage controlled square wave, it is NOT current source.
Below is the capture of 200mA specification at 25C, which is up to ±200mA. The output signal ranges are a function of output current and temperature.
If the SE555 is required to drive high current over a wide temperature rage, it will be good to implement an external boosted current stage with BJT or MOSFET at output, and lower the heat dissipation in a 555 timer.
If you have additional questions, please let us know.
Best,
Raymond
