ZHCSBB4B July 2013 – June 2017 TPS61197
PRODUCTION DATA.
When the IFB pin reaches the threshold (VIFB_OVP in the Electrical Characteristics table) of 1.1V during startup or normal operation, the device stops switching and stays in the latch-off state immediately to protect from damage. This function protects the external dimming MOSFET from damage when the LED string is shorted from the anode (connecting to output of the boost converter) to its cathode.