typical). This is often a , meaning the IC restarts once it cools.
In repair contexts, a "protection pin update" usually refers to disabling these safety features to diagnose if the IC itself is faulty or if the issue lies in aging LED strips that are triggering the protection unnecessarily. Common Modification / "Update" Global Protection
Internal circuits for Over-Current and Over-Temperature protection that shut down the IC to prevent permanent damage. The "Protection Pin Upd" (Update/Bypass) mp3378e protection pin upd
Before modifying any circuit architecture, it is essential to understand the nominal operating boundaries of the IC as outlined in the MP3378E Datasheet : : 8V to 24V nominal. WLED Current Capability : 4 channels up to 350mA per string.
If you want, I can:
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.
If the internal OVP of the MP3378E (e.g., 80V) is too high for your LEDs, use a resistor divider from the boost output to UPD via a Zener diode. typical)
: Current sink inputs for each LED backlight string. Pin 12 (COMP) : Error amplifier output for compensation.
, which is critical for the external boost MOSFET circuitry. Buck Converter Protection : Includes dedicated OCP and thermal shutdown for the internal bus voltage regulator. MPS | Monolithic Power Systems Proposed Feature: Intelligent Fault Latching If you want, I can: Note: specific electrical