The IC monitors the voltage on each LED channel (LED1–LED4). If a string shorts or opens, the IC can disable the faulty channel while allowing the remaining strings to operate, or trigger a full shutdown depending on the severity.
Are you currently troubleshooting a issue or designing a new PCB layout for this chip? MP3378E - Monolithic Power Systems mp3378e protection pin upd
The you are seeing (e.g., backlight flashes then dies). The voltages you've measured on the OVP or VCC pins. If you are looking for a protection bypass for testing. MP3378E - Monolithic Power Systems The IC monitors the voltage on each LED
Ensure the soft-start time (t_SS) is longer than the output rise time. mp3378e protection pin upd