Sn51dp: Datasheet Pdf |verified|

If the backlight flashes briefly and then goes out, check the voltage at Pin 9 (OVP). If it exceeds the threshold, the IC is shutting down to protect the circuit from an open LED string.

Compensation node for the error amplifier loop stability. Pin 9 (OVP): Over-Voltage Protection input terminal. sn51dp datasheet pdf