Other Parts Discussed in Thread: TPS2115A
Hi,
I've couple of configuration questions involving the parts 2113A and 2115A. In my platform IN1 is 5V and IN2 is battery power 4.37V. IN1 is always higher.
1. If I use TPS2113A and connect both pins EN# and SNS to ground, it seems like the mux will always select the higher voltage between IN1 and IN2 for output when both supplies are present, why should I use a resistor divider for the SNS pin? Is grounding SNS pin is not a valid configuration? Will the mux output not automatically switch over the secondary supply when one supply disappears?
2. If I use TPS2115A and connect pin D0 to ground and pin D1 directly to IN1 supply then the mux will always select the higher voltage between IN1 and IN2 for output when both supplies are present, is connecting D1 to IN1 directly is not a valid option? Will the mux output not automatically switch over the secondary supply when one supply disappears?
3. Will there be any glitch in the mux output pin for substantial amount time to cause system to reboot when one of the power supply disappears in above two configuration (assuming the battery is fully charged when IN1 disappears?),
Thank you for helping.