Mp3378e Protection Pin Upd Jun 2026

Disconnect the LED+ and LED- cables from the driver board. Replace with a dummy load (e.g., 1kΩ resistor from SW to GND and a 47kΩ from VOUT to GND). This removes actual LEDs from the equation.

Technicians often check the voltage on this pin; if it exceeds the internal reference, the IC shuts down. In some ICs (like the related MP3398E), connecting a to ground can stabilize protection behaviors . Disabling Protection (For Diagnosis Only): mp3378e protection pin upd

Detects faults in individual LED strings . Disconnect the LED+ and LED- cables from the driver board

: Used for Over-Current Protection (OCP) . It monitors the current through the inductor to prevent saturation or damage during heavy load conditions. Technicians often check the voltage on this pin;

The MP3378E includes comprehensive protection mechanisms that monitor various conditions to prevent hardware failure: LED Protection : Detects and responds to both

Conclusion The PROT pin on the MP3378E is a flexible and important interface that enables external monitoring, configurable fault response, and safer system-level handling of overcurrent, short-circuit, and thermal events. Proper use requires following datasheet recommendations for pull-ups, timing components, and interaction with EN/PG/soft-start pins; careful PCB layout and testing across conditions are essential to ensure reliable protection without nuisance trips.

Provide better stability under line transients and AC rectifier voltage spikes.