ZHCSLM9B August 2020 – May 2024 LP8866S-Q1
PRODUCTION DATA
VIN OCP current limit is totally different from boost cycle-by-cycle current limit.
Boost cycle-by-cycle current limit is to protect the DC/DC components (inductor, schottky diode and switching MOSFET) in normal scenario, avoiding current running over their max limit. The normal scenario means when loading has sharp change or input voltage has sharp change. It won't trigger any device fault.
VIN OCP current limit is to protect system from ciritical system hazard (e.g, inductor short, switching MOSFET short). It will trigger the device to shutdown all the LED channels and enter into fault recovery state.
VIN OCP current limit should be always greater than boost cycle-by-cycle current limit. This means RISENSE should be always no smaller than RSENSE.