SLVSF24C december 2020 – may 2023 TPS272C45
PRODUCTION DATA
The SNS output can be used to sense the load current through either channel. The SNS pin outputs a current that is proportional to the load current through either channel, depending on the state of the SEL pin. This current is sourced into an external resistor to create a voltage that is proportional to the load current. This voltage can be measured by an ADC or comparator and used to implement intelligent current monitoring for a system. To ensure accurate sensing measurement, RSNS must be connected to the same ground potential as the μC ADC.
The SNS pin output is controlled by the SEL pin. If SEL pin is low, SNS outputs load current proportional to channel 1, whereas if SEL is high SNS outputs load current proportional to channel 2.
Equation 3 shows the transfer function for calculating the load current from the SNS pin current.
KSNS is defined in the Specifications section.