I have been designing a circuit for various
Power protections like
reverse input polarity. I have selected Industrial
eFUSE TPS26601. I have few queries regarding the circuit designing for TPS26601.
- I am using a switch to pull-down
SHDNpin for shutdown and leave it floating for normal operation as
Page 25of the datasheet shows an internal pull-up resistor. Am I correct?
- I know how to connect
RTNpin of the IC but I am not sure why it has been there. The datasheet says it is for Device's Internal Reference. Why can't they have single pin (use GND for Device Internal Reference)?
Imonpin of the IC is referred w.r.t to
RTNpin. Imon pin outputs a current proportional (Reduced by certain factor) to current flowing through
OUTpin. Connecting a resistor across
RTNpin can convert the current to voltage and external ADC can calculate the system current. Since,
Imonresistor is connected w.r.t
RTNpin, I am not sure about using
opto-coupler. Should I use it? Is it safe to connect directly to MCU?