Monday 21 August 2017

power - Should I add Capacitance on Switched High Side


Following from this question, which remains open... if I've got a microcontroller switching the high-side power to a sub-system, using a circuit like this:


enter image description here



... should I add bulk and/or decoupling capacitance on the SENSOR_5V net? I do have bulk and decoupling capacitance on the +5V net. In the broader context of this circuit, SENSOR_5V basically just goes to a connector pin, which supplies power to a separate board through a short cable.


So, now I'm wondering (in light of the referenced prior question) whether it would be a help or a hindrance to add say a 10uF ceramic and a 100nF ceramic to the SENSOR_5V net? Or maybe even a 100uF tantalum perhaps? What do you think?




No comments:

Post a Comment

arduino - Can I use TI's cc2541 BLE as micro controller to perform operations/ processing instead of ATmega328P AU to save cost?

I am using arduino pro mini (which contains Atmega328p AU ) along with cc2541(HM-10) to process and transfer data over BLE to smartphone. I...