If an external fault is detected, the monitoring circuit pulls the protection pin low. Upon detecting this logic low state, the MP3378E immediately ceases operation. It shuts off the gate drive to the external MOSFET and turns off the LED current sources. This instant reaction prevents damage to the LEDs, the driver IC, and the power MOSFET.
~5V (pulled up internally or externally). Fault State: 0V (Pulled low by internal MOSFET). mp3378e protection pin
The versatility of the MP3378E protection pin lies in the fact that it acts as a generic "kill switch." The engineer has the freedom to design external circuitry that triggers this pin based on specific application needs. Common triggers include: If an external fault is detected, the monitoring
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