JAJSHA8A February 2018 – April 2019 TPS2HB50-Q1
ADVANCE INFORMATION for pre-production products; subject to change without notice.
The SNS output may be used to sense the load current or device temperature. The SELx pins will select the desired sense signal. The sense circuit will provide a current that is proportional to the selected parameter. This current will be sourced into an external resistor to create a voltage that is proportional to the selected parameter. This voltage may be measured by an ADC or comparator.
To ensure accurate sensing measurement, the sensing resistor should be connected to the same ground potential as the μC ADC.
PARAMETER | TRANSFER FUNCTION |
---|---|
Load current | ISNSI = IOUT / KSNS (1500) |
Device temperature | ISNST = (TJ – 25°C) × dISNST / dT + 0.85 |
The SNS output will also be used to indicate system faults. ISNS will go to the predefined level, ISNSFH, when there is a fault. ISNSFH, dISNST/dT, and KSNS are defined in the Specifications section.