If you’re designing a product with the MP3378E, implement these best practices to avoid protection pin UPD issues in production.
If the feedback voltage at the OVP pin exceeds the OVP threshold (typically ), the IC shuts down.
: Supports independent Pulse Width Modulation (PWM) and analog dimming modes simultaneously to achieve precise brightness curves. 2. Synchronous Buck Converter Section Power Stage : Integrates internal low mp3378e protection pin upd
The IC monitors the voltage on each LED channel (LED1–LED4). If a string shorts or opens, the IC can disable the faulty channel while allowing the remaining strings to operate, or trigger a full shutdown depending on the severity.
If one string is damaged, you can sometimes connect the faulty string's input to a functional channel (via a resistor), effectively tricking the IC into thinking all 4 strings are active. Summary of MP3378E Features 4-String WLED Controller: Max 350 mA/string. External MOSFET Drive: Drives boost converter. Input Range: Up to 24 V. Dimming: Supports both analog and PWM dimming. Package: Available in SOIC28 and TSSOP28EP. If you’re designing a product with the MP3378E,
In many MPS backlight topologies, fault timing is governed by charging a capacitor attached to a compensation or dedicated timing terminal.
Detects if any of the 4 strings are not functioning correctly. If one string is damaged, you can sometimes
The manufactured by Monolithic Power Systems (MPS) . It is widely used in LCD monitors and LED TVs. It combines a 4-channel White LED (WLED) backlight controller and a high-efficiency buck converter.
: Manages up to 4 distinct LED strings with an impressive 2.5% current matching accuracy.
In repair scenarios where a monitor shuts down due to aging LEDs (causing a "protection trip"), technicians sometimes modify the OVP circuit. However, for the MP3378E, the protection is .