[2021] — Lx1692 Protection Pin

For detailed pin mapping, you can refer to the LX1692 Datasheet at Alldatasheet or Scribd . lx1692 PDF | PDF | Electronic Circuits | Capacitor - Scribd

The LX1692 integrates several safety mechanisms to prevent hardware damage from common backlight faults:

Registers sudden current spikes resulting from transformer winding failures or chassis shorts.

The functions via the C_TO (Time Out) capacitor channel, serving as the central mechanism for fault monitoring and latch-shutdown timing in CCFL inverter controllers . Produced by Microsemi (now Microchip Technology), the LX1692 manages power delivery across Cold Cathode Fluorescent Lamps (CCFL) used in legacy LCD TVs and monitors. lx1692 protection pin

If you are repairing an LCD TV or monitor and suspect the protection circuit is being triggered:

实测电压数据来源于LX16921DW在长虹FSP107-2PS01电源板上的正常工作环境，实际数值可能随灯管状态和负载变化而略有浮动。该电源板只启用了AOUT/BOUT这一组驱动输出（驱动前级半桥），COUT/DOUT未使用，因此测得电位偏低——这属于应用方案中的常态。

I can provide targeted troubleshooting steps for your exact setup. Share public link For detailed pin mapping, you can refer to

正常运行中，ISNS电压若连续256个计数周期低于0.3V（表明灯管电流极小），芯片就会判定灯管已熄灭并锁存故障。该计数由内部9位二进制计数器管理，每个灯管电流周期通过一次后计数器被清零，因此足够长的“无电流”时间才是触发锁定的必要条件。在数字调光关闭期间此保护功能会被暂时抑制，以避免PWM关断脉冲导致误保护。

In the television repair community, technicians often identify a specific pin to bypass or "disable" the protection circuit for diagnostic purposes. This allows them to see if the backlight briefly illuminates, helping to confirm if the issue is a faulty lamp, a damaged transformer, or the IC itself. lx1692 PDF | PDF | Electronic Circuits | Capacitor - Scribd

When a TV powers on for a second and then the backlight clicks off, the LX1692 has done its job. The technician is often tempted to "force" the TV on. In the repair community, there is a known trick involving the Protection Pin: Produced by Microsemi (now Microchip Technology), the LX1692

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. lx1692 PDF | PDF | Electronic Circuits | Capacitor - Scribd

) to set the duration before the controller enters a fault-shutdown state. icquest.ru Pin-Specific Functions

This indicates that the mainboard is functional, but the LX1692 has actively locked its gate drive outputs due to an unaddressed fault. Tracking Down the Root Cause