Eyal78
New Member
My circuit includes the following components:
Do the following signals qualify as high-speed?
I’m asking this to determine whether I need to ensure a proper return path for them and/or maintain large spacing between them.
If not, can I ignore the return path considerations?
Key signals I believe require attention:
Thanks in advanced for any answer,
Eyal
- PIC16 with internal clock, frequency: 32 MHz
- ST LED2000 LED driver (a buck converter) with a PWM dimming input
- TI BQ24070RHL battery charger
- LED controlled via PWM by the microcontroller.
Do the following signals qualify as high-speed?
I’m asking this to determine whether I need to ensure a proper return path for them and/or maintain large spacing between them.
If not, can I ignore the return path considerations?
Key signals I believe require attention:
- Charger outputs – These are open-drain outputs. These outputs are connected to the microcontroller inputs (with internal PU). I couldn't find rise/fall time specifications in the datasheet.
- PWM outputs from the microcontroller– Base frequency: 200–500 Hz.
- One output goes to the LED driver (possibly with or without a pull-down resistor).
- Another output drives an LED.
- Push button with a pull-down resistor, connected to a microcontroller input.
Thanks in advanced for any answer,
Eyal
