Mp3378e Protection Pin Upd New! Jun 2026

To update the IC state and bypass the protection loop for debugging, technicians frequently ground the fault detection nodes or modify the OVP resistor network. By forcing a stable reference voltage onto the protection-checking pins, the internal fault amplifier is bypassed, allowing the backlight inverter to remain on continuously. This step lets you visually isolate which exact LED strip contains dead or dim diodes before installing replacement parts.

) on Pin 24/25. If the power supply is noisy or weak, the MP3378E may trip. Step 2: Test the OVP Circuit mp3378e protection pin upd

), the OVP resistor divider may be damaged, or the output capacitor is open. Step 3: Check LED Strings (LED1-4) To update the IC state and bypass the

To test if the IC is functional, you can simulate a connected string by pulling the unused LED pin (e.g., LED3) to the voltage of another working pin (e.g., LED1) using a diode, or shorting the unused LED pin to ground through a resistor (usually not recommended for permanent use). 5. Summary Table of Pin Functionalities Description Fault Type 9 OVP Over-Voltage Protection Sense High Voltage 5-8 LED1-4 LED String Cathode Feedback Short/Open 22 ISENSE Inductor Current Sense Overcurrent 24 VIN1 Power Input Under-voltage ) on Pin 24/25

Protects against hardware failures in the boost circuitry. The Role of the OVP Pin in Protection

Designing with the MP3378E requires a precise understanding of its integrated protection features—specifically the and OCP (Over-Current Protection) pins—to ensure the backlight system remains stable and prevents catastrophic board failure. The Role of Protection Pins in MP3378E

The does not have a single pin labeled specifically as "protection"; instead, its comprehensive protection suite is spread across several specialized pins including OVP , ISET , ISENSE , and LED1–4 .