Mp3378e Protection: Pin Upd

Sets the LED current; a resistor between this pin and ground programs the brightness.

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. mp3378e protection pin upd

Limits current to the external MOSFET and internal buck converter. Sets the LED current; a resistor between this

The MP3378E integrates multiple protection modes to safeguard the IC and the LED strings from damage: Sets the LED current

Technicians sometimes attempt to "bypass" or "enable" protection pins to diagnose whether a failure is due to a faulty LED or the driver IC itself.

Current sinks for the 4 LED strings; failures here often trigger protection.