Hi. All sense pins in this schematic are used with diodes. Anyone can explain? And what diodes will work here. No info in datasheet.

Thanks,
Roman

 

To clamp the input.

 

And what about the ratings of the diode? Anything will work here?

 

Any clue what PVDD is, or is that a secret?

The resistor divider on each SENSE is about 8:1, so a SWAG is a 3.3 V CPU and a 24 V input. Since the source impedance is around 35K, spike transient currents are in the low mA range. My guess is that any small signal Shottkey diode will work, maybe something in the BAS series.

ak

 

Great, thanks. PVDD is the battery + here.

 

The number of volts ... ?

 

24V if you are using a battery with that voltage. It is the main power supply you are using with your motor and driver.

 

The spec for the diode will depend on what kind of source you are dealing, specifically voltage swings and output impedance.

The lack of a serial resistor in front of the diodes suggest the sources are fairly week.