JAJSK93 November 2020 TPS27SA08
PRODUCTION DATA
The TPS27SA08 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.