Mp3378e Protection Pin Upd |verified| -

The MP3378E features an exposed thermal pad underneath the HTSSOP-28 package. If the solder joint on this pad cracks due to thermal cycling, the IC will experience rapid thermal blooming, triggering the internal recoverable thermal shutdown within seconds of power-up.

Protects the external MOSFET and inductor.

Choose R_pullup such that at the desired trip temperature, ( V_UPD = 5V \times \fracR_NTC(T_trip)R_NTC(T_trip) + R_pullup < 1.22V ). mp3378e protection pin upd

: Monitors the boosted output voltage feeding the LED strings.

Guards the boost circuit components . Handling Protection Pins for Repair The MP3378E features an exposed thermal pad underneath

The VISENSE pin checks the peak current passing through the primary boost inductor and external MOSFET. If the inductor saturates or a diode shorts, the voltage across the source resistor jumps. The internal logic updates instantly, truncating the PWM gate pulse cycle-by-cycle to prevent an over-current blow-out. Troubleshooting and Circumventing Protection Faults

Bypassing protection can cause permanent damage to the LEDs or the driver if an actual short circuit exists . Current Adjustment: Choose R_pullup such that at the desired trip

: Delivers up to 350mA per string to power high-brightness display backlights.

This section manages the high-voltage boost converter and current sinking for the LED backlight strings. Its protections are critical for panel safety.

The is a critical aspect of repairing and designing modern LED/LCD display boards . The Monolithic Power Systems MP3378E is an integrated single-chip solution that combines a 4-channel WLED backlight controller with a high-efficiency step-down (buck) converter .