Hello,
I present the next circuit:
- 3.3VDC supplied by a DC-DC converter, main power is from a battery of a car (12V or 24V)
- In the output of DC-DC, within other smaller capacitors, I have a 1000uF or 2200uF (like an X capacitor), which I want to use as EMI suppression capacitor and reservoir, basically to give protection and stability to the circuit
- In this PCB there are different IC and one MCU which power is taken from the 1000uF or 2200uF capacitor line
The problem is that after powering off the PCB, the 1000uF or 2200uF capacitor is fully loaded and that load will be going away veeeeeery slowly so the circuit would enter in a brown-out condicion. Basically I want to discharge the capacitors after power down, I am thinking about using a bleeder resistor to discharge this large capacitor in like a hundred miliseconds
What do you think of this? What would you do to discharge the circuit after powering down safeliy the circuit?
I present the next circuit:
- 3.3VDC supplied by a DC-DC converter, main power is from a battery of a car (12V or 24V)
- In the output of DC-DC, within other smaller capacitors, I have a 1000uF or 2200uF (like an X capacitor), which I want to use as EMI suppression capacitor and reservoir, basically to give protection and stability to the circuit
- In this PCB there are different IC and one MCU which power is taken from the 1000uF or 2200uF capacitor line
The problem is that after powering off the PCB, the 1000uF or 2200uF capacitor is fully loaded and that load will be going away veeeeeery slowly so the circuit would enter in a brown-out condicion. Basically I want to discharge the capacitors after power down, I am thinking about using a bleeder resistor to discharge this large capacitor in like a hundred miliseconds
What do you think of this? What would you do to discharge the circuit after powering down safeliy the circuit?