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Lx1692 Protection Pin

Unlike simple logic inputs that expect a rigid 0V or 5V, the Protection Pin is designed as a . It usually sits at a specific reference voltage (often tied to an internal reference or VDD) during normal operation. The genius lies in how it interacts with external components. It is not just listening; it is waiting for a signal to pull it down.

Sometimes, the chip is the problem. The protection pin can develop an internal short to Vcc due to a power surge or a lightning strike.

Shuts down the controller if a short is detected in the lamp or secondary circuit. Over Voltage Protection (OVP):