Mp3378e Protection Pin Upd Free Jun 2026

[System powers on] | v [PROT pin ramps 0V → 0.8V?] ---No---> [Check C_PROT soldering; replace with 22nF-100nF] | Yes | v [VOUT rises. PROT pin hits 2.0V?] ---Yes---> [OVP trip. Increase C_PROT or lower output target] | No | v [Backlight turns on. Stable operation.]

The is a dual-function integrated circuit commonly found in monitors, combining a 4-channel LED backlight driver with a high-efficiency buck converter . When repairing backlight issues, technicians often look for ways to "bypass" or "update" the protection behavior to diagnose whether the fault lies in the LEDs or the driver itself. Key Protection Features mp3378e protection pin upd

Connect an open-drain/collector transistor or mechanical switch between UPD and GND. When activated, it pulls UPD low → immediate latch-off. [System powers on] | v [PROT pin ramps 0V → 0

Note: specific electrical characteristics (threshold voltages, timing windows, pin-package names) can vary by manufacturer revision—consult the device datasheet and manufacturer application notes for precise numbers when designing. The treatment below uses standard conventions for modern synchronous buck controllers and the MP3378-family behaviour as commonly documented. Stable operation

Based on the component naming convention, the typically refers to the Monolithic Power Systems (MPS) MP3378 , a popular 8-string WLED driver controller.