Over-Voltage Protection. Prevents the IC from damaging itself if the load is disconnected. SW / LX
A higher-boosted version of VGH used in certain panel drive stages. Inx In518 Ic Pinout Diagram
Measure before and after the T-CON board SMD fuse to ensure a solid 12V DC is passing safely onto Pin 4 of the IC. Over-Voltage Protection
Buffered reference signal output through internal op-amps to maintain the reference baseline voltage of the liquid crystal layer. Inx In518 Pinout Topology Reference (QFN-40) Measure before and after the T-CON board SMD
Locate the decoupled VCOM test point near the panel flex connector ribbon. It should register a steady reference voltage, typically between 5.5V and 7V DC , depending on the exact screen configuration.
| Parameter | Value / Information | Notes | | :--- | :--- | :--- | | | DC-DC Converter / Power Management IC (PMIC) | Generates multiple voltages for LCD panels | | Package Type | QFN-40 | 5mm x 5mm, 0.4mm pitch | | Input Voltage (VIN) | +12V DC (typical) | From T-CON board | | Key Output Voltages | VAA: +17.9V VDD: +3.3V VGL: -12.5V VGH: +30.4V VCOM: +7.32V | Generated from the main 12V input | | Control Interface | Enable (EN) and Power Good (PWR_OK) signals | For power sequencing with the main processor | | Protection Features | Overcurrent, Undervoltage, Overtemperature | Prevents damage to the LCD panel | | Sub-Models | IN518-NT02, IN518-RI02, IN518-T02 | Some variants may have specific firmware or minor differences |
Since no public datasheet exists, use these hands-on methods: