When the LED load is open, the FB voltage is low, and the internal COMP voltage is driven high and clamped. This action triggers a shutdown delay counter (TPS54200) or auto-retry wait counter (TPS54201). For the TPS54200 device, once the shutdown delay time tSHUTDOWN_DELAY expires, the device shuts down and latches off. Both FETs are kept off. This is a latched shutdown. The device can be reset by recycling VIN. For TPS54201, once the auto-retry wait time tHIC_WAIT expires, the device shuts down and starts auto-retry timer tHIC_OC. During the shutdown period, both FETs are kept off. Once the auto-retry timer expires, the TPS54201 device restarts again. If the failure still exists, the TPS54201 device repeats the foregoing shutdown-and-restart process.