Open-string protection is achieved by monitoring the voltage on the OVP pin. If an LED string fails, the controller may boost output voltage excessively; if it hits the programmed OVP threshold, the chip shuts down to prevent damage.
If the backlight flashes and then turns off, the IC has likely detected a fault (e.g., an open LED string) and triggered its internal protection. mp3378e protection pin upd
Over-Voltage Protection input; senses output voltage via a resistor divider. Open-string protection is achieved by monitoring the voltage
The MP3378E is housed in a 28-pin TSSOP package with an exposed pad for heat dissipation. Primary Function mp3378e protection pin upd