Pin !link! — Lx1692 Protection

Are you trying to the protection for troubleshooting?

When measuring, you must catch the voltage during the brief moment the backlight tries to turn on. Many technicians use a storage oscilloscope or an analog multimeter with a fast needle response to observe the "ramp-up" before shutdown. lx1692 protection pin

This pin allows for Programmable Time-Out Protection . By connecting an external capacitor, you can set the maximum "strike interval" duration. If the lamp fails to ignite within this time, the IC shuts down the outputs to prevent component damage. Are you trying to the protection for troubleshooting

| Condition | Voltage on Protection Pin (Pin 11) | Chip Behavior | | :--- | :--- | :--- | | No load, chip idle | 0V | Off | | Normal operation | 0.8V - 1.2V | Active, backlight on | | Threshold trigger | 1.5V - 2.0V | Immediate shutdown | | Short to Vcc | 3.3V or 5V | Permanent shutdown | This pin allows for Programmable Time-Out Protection

This is the primary monitoring point. During normal operation, the IC expects current levels to remain within a specific range (typically ). If the voltage at this input falls below

If you bypass protection and see one part of the screen is darker, or hear a "hissing" sound, you have found the faulty lamp or arcing transformer. 💡 Key Technical Specs Operating Topology: Resonant Full Bridge. Package Type: 20-Pin TSSOP or SOIC. Dimming: Supports both Analog and Digital (PWM) dimming.

On the LX1692 datasheet, the protection pin is often labeled as or simply the protection input. Its function is binary: