1. Overview The LX1692 is a high-efficiency, full-bridge inverter controller designed for CCFL (Cold Cathode Fluorescent Lamp) backlighting in LCD displays. To ensure safe operation and prevent damage from fault conditions, the IC integrates multiple protection features managed through a dedicated Protection Pin (often labeled as OVP or CP in datasheets).
Vpin = Vsec_peak * (R2 / (R1+R2)) Set Vpin = 1.2V at desired OVP trip voltage (e.g., 1600V peak). 3.2 Short-Circuit Protection (SCP) & Lamp Current Feedback Purpose: Detects a shorted lamp, broken return path, or excessive current. lx1692 protection pin
