SLVSFP0 August 2021 TPS25860-Q1 , TPS25862-Q1
PRODUCTION DATA
For the TPS25862-Q1, PA_FAULT and PB_FAULT are the fault indication pins for PA_USB and PB_USB, respectively. FAULT is in an open-drain state during shutdown, start-up, or normal condition. When the USB switch enters hiccup mode, or overtemperature thermal shutdown (OTSD) is triggered, Px_FAULT is pulled low. FAULT asserts (logic low) on an individual USB switch during an overcurrent or overtemperature condition. Px_FAULT switches high after the fault condition is removed, and the USB output voltage goes high again.
The device features an active-low, open-drain fault output. Connect a 100-kΩ pull-up resistor from Px_FAULT to SENSE or other suitable I/O voltage. Px_FAULT can be left open or tied to GND when not used.
Table 10-4 summarizes the conditions that generate a fault and actions taken by the device.
EVENT | CONDITION | ACTION |
---|---|---|
Overcurrent on Px_BUS | IPx_BUS > Programmed IILIM | Px_BUS load switch enter hiccup mode. The fault indicator asserts with a 4.1-ms deglitch and de-asserts with a 16.4-ms deglitch. The fault indicator remains asserted during the Px_BUS overload condition. |
TPS2586x-Q1 overtemperature | TJ > TSD | The device immediately disables and asserts fault indicator with no deglitch. The device attempts to power up once the die temperature decreases below the thermal hysteresis threshold as specified |