Mp3378e Protection Pin Upd [verified] Jun 2026

Check the voltage at the OVP pin (resistor divider from Boost output to Ground). 3. Check for False Triggers

: Runs at a fixed 235kHz but supports external clock synchronization ranging from 250kHz to 2MHz.

Technicians often check the resistor values for the OVP resistor divider to ensure the chip is receiving the correct feedback voltage. Troubleshooting and "Bypassing"

The source current of the external boost power MOSFET flows through a current-sense resistor hooked up to the . MP3378E - Monolithic Power Systems

The MP3378E relies on to ensure the open-circuit boost voltage does not destroy the external N-channel MOSFET, filtering capacitors, or output diodes. How OVP Works Internally mp3378e protection pin upd

To help narrow this down, feel free to share when it turns on, or if the buck converter side is still outputting power after the backlight cuts off. Share public link

+-----------------------+ | MP3378E | | TSSOP-28 | | | ------> OVP (Over-Voltage) | ------> COMP (Compensation) | ------> ISET (Current Set) | ------> EN1 (WLED Enable) | ------> EN2 (Buck Enable) | | | +-----------------------+ OVP (Over-Voltage Protection) Pin

: It is typically connected to a resistor divider from the output voltage.

The EN pins turn on the WLED controller and Buck systems. If the scalar board's microcontroller fails to pull the EN pin above the logic-high threshold, the chip will remain in an un-triggered standby state. Step 3: Inspect Thermal and Mechanical Solder Joints Check the voltage at the OVP pin (resistor

Use an external LED backlight tester to individually run each string. Check for uniform current draw. Verify Thermal Ground

[ V_OUT(OVP) = 2.0V \times \left(1 + \fracR_TOPR_BOTTOM\right) ]

: Leveraging the buck converter's OCP to ensure that even if the backlight fails, the internal standby power remains stable for diagnostic reporting to the main system processor. MPS | Monolithic Power Systems

To properly diagnose protection faults, one must understand how the dual architectures inside the MP3378E partition their tasks: 1. WLED Controller Section Technicians often check the resistor values for the

As the output voltage spikes, the voltage divider connected to rises.

The is a highly popular combo integrated circuit (IC) manufactured by Monolithic Power Systems (MPS) . It is widely used in desktop LCD flat-panel displays, industrial monitors, and televisions. This chip uniquely combines a 4-channel White LED (WLED) backlight boost controller with a high-efficiency synchronous buck converter .

: Manages up to 4 distinct LED strings with an impressive 2.5% current matching accuracy.