Sn51dp Datasheet Pdf |link|

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.

While a direct, detailed PDF datasheet was not extracted, the function as an "LCD power chip" implies standard functionalities related to powering liquid crystal displays. sn51dp datasheet pdf