SNVSBY7 March 2021 TPS92390
During device initialization, any of un-used LED outputs pins are checked whether connected to GND or not. If they are not connected to GND as expected, the TPS92390 reports invalid string fault and tries to function normally if possible. The INVSTRING_STATUS fault bit is set in the LED_FAULT_STATUS register, and the INT pin is triggered. The LEDSET resistor missing or invalid fault is not detected after initialization, so that the TPS92390 operates in the configuration determined during initialization even though the LEDSET resistor is missing or invalid after initialization.