SLVSFZ1 December 2020 TPS27SA08-Q1
The TPS27SA08-Q1 device is designed to provide an enhanced set of diagnostic and protection features. However, if the system design only allows for a limited number of I/O connections, some pins may be considered as optional.
|PIN NAME||CONNECTION IF NOT USED||IMPACT IF NOT USED|
|SNS||Ground through 1-kΩ resistor||Analog sense is not available.|
|LATCH||Float or ground through RPROT resistor||With LATCH unused, the device will auto-retry after a fault. If latched behavior is desired it is possible to use one microcontroller output to control the latch function of several high-side channels.|
|ST||Float||All faults are indicated by the analog SNS pin. The
ST pin provides the additional benefits:
|SEL1||Float or ground through RPROT resistor||SEL1 selects between the VBB and TJ sensing features. With SEL1 unused, only load diagnostics are available.|
|SEL2||Ground through RPROT resistor||With SEL2 = 0 V, VBB measurement diagnostics are not available.|
|DIA_EN||Float or ground through RPROT resistor||With DIA_EN unused, analog sense, open-load and short-to-supply diagnostics are not available.|
RPROT is used to protect the pins from excess current flow during reverse supply conditions, for more information please see the section on Reverse Supply protection.