JAJSHI6G June 2018 – July 2021 TPS25830-Q1 , TPS25831-Q1
PRODUCTION DATA
The device features an active-low, open-drain fault output. Connect a 100-kΩ pullup resistor from FAULT to VCC or other suitable I/O voltage. 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 OUT | NFET or Buck average current limit implemented per Current Limit Setting using RILIMIT.
ICSN/OUT > programmed ISNS. | The device regulates current at ISNS either by external NFET or by the buck
regulator control loop. When current limiting by external NFET, there is NO fault indicator assertion under minor overload conditions. When current limiting by buck average current, there is NO fault indicator assertion under minor overload conditions. Hard shorts during average buck current limiting may trigger buck hiccup operation. The FAULT indicator asserts immediately after NOC cycles in and persists for TOC as specified in the Cycle-by-Cycle Buck Current Limit section. |
Overvoltage on BUS | VBUS > VBUS_OV | The device turns on the BUS discharge path in the event of an overvoltage conditions, and turn off the LS_GD immediately. The FAULT indicator asserts and de-asserts with a 8-ms deglitch. |
Overvoltage on the data lines | DP_IN or DM_IN > VDx_IN_OV | The device immediately shuts off the USB data switches. The FAULT indicator asserts and de-asserts with a 8-ms deglitch. |
Overvoltage on CC lines | CC1 or CC2 > VCCx_OV | The device immediately shuts off the CC lines. The FAULT indicator asserts and de-asserts with a 8-ms deglitch. |
Overcurrent on CC lines when supplying VCONN | ILOAD_CCn > IOS_CCn | The FAULT indicator asserts and de-asserts with a 8-ms deglitch. The FAULT indicator remains asserted during the VCONN overload condition and the VCONN path is not disabled. |
TPS25831-Q1 External overtemperature detection (NTC) | VNTC ≥ VWARN_HIGH | Thermal warning flag THERM_WARN asserts immediately. Also the type-C advertise current will change to 1.5 A if operate with 3 A originally. The FAULT flag is not asserted for this condition, but will assert for conditions stated in this table. |
TPS25831-Q1 External overtemperature detection (NTC) | VNTC ≥ VSD_HIGH | The device immediately shuts off the buck regulator, opens the USB data switches, while simultaneously pulling LS_GD and BUS low. The THERM_WARN indicator remains asserted. |