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When more LED strings are required in the application, the TPS61196 can work in master/slave mode. The TPS61196 can be set as slave device when the voltage at the FSW pin is below 0.5 V or above 3.5 V. The master TPS61196 has booster controller and outputs the power rail for all LED strings. The slave TPS61196 only works as a LED driver and feedbacks the required headroom voltage to the master by connecting the slave's COMP pin to the master's REF pin. The ISNS pin of the slave TPS61196 must be connected to ground. The slave's OVP pin voltage must be 3% higher than the voltage at the master's OVP pin. The slave device can combine all fault conditions happening on both master and slave devices by connecting the master's FAULT output to the FSW pin of the slave device. The slave’s FAULT pin outputs the indication signal for all fault conditions
