Lx1692 Protection Pin [exclusive]

Are you trying to the protection for troubleshooting?

When a fault condition is detected (such as an open lamp), the LX1692 does not always shut down instantly. Instead, it enters a "striking phase."

此引脚主要用于检测流经变压器原边或功率MOSFET的异常过电流。芯片内部通过一个比较器将OC_SNS采样电压与2V参考基准进行比对——一旦信号超过2V阈值，控制器就会强制关闭PWM输出，以避免功率管被瞬时浪涌击穿。 lx1692 protection pin

Secondary winding voltage exceeds safety thresholds. 2. Identifying the Protection/Feedback Pins

：基础版LX1692与LX1692A的主要差异在于后者更突出LCD TV所需的宽电压逆变器适应性（7V–22V），而LX1692F则作为第三代优化版进一步提升了灯管启辉效率和灯管适配范围，适合驱动双灯管以上的大屏模组。 Are you trying to the protection for troubleshooting

Understanding the LX1692 Protection Pin: Function, Circuit Design, and Troubleshooting

ISNS引脚是灯管工作状态判断的核心。芯片内部对输入信号进行全波整流后送入电流误差放大器，进而闭环调节驱动占空比以稳定灯管亮度。同时它承担着点火检测的任务——在点火期间，如果ISNS接收到任何一个大于0.7V的单周期脉冲，内部逻辑就会将状态从“启辉（Strike）”切换至“运行（Run）”，并同步将点火比较器的参考阈值降低至0.3V以支持模拟调光。 lx1692 protection pin

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