The (also identified as 1N518 ) is a specialized integrated circuit primarily utilized in high-performance LCD panel T-CON boards . Packaged in a compact QFN-40 format, this chip functions as a power management solution or "DC-to-DC IC," responsible for generating the various voltage rails required to drive liquid crystal displays. Functional Overview and Application
Pins to enable or disable the IC (EN or ENABLE). Detailed Pin Function Analysis
If IN518 is on a T-con board, search for the LCD panel's service manual (e.g., Innolux MT3151 or similar) — the schematic will show the IC's real pinout.
: Pay attention to the exposed thermal ground pad located in the middle under the chip. Ensure it fuses seamlessly with the board's copper plane, as poor anchoring leads to premature thermal failure. Share public link Inx In518 Ic Pinout Diagram
To correctly read an Inx In518 pinout diagram, place the IC flat on a surface with its notch or dot orientation marker facing upward (or to the left). Counting starts from Pin 1 at the top left and proceeds counterclockwise around the chip.
Deploying the IN518 effectively requires selecting the correct passive components. Below is an overview of how to build a reliable step-down configuration around this IC.
Pins 1 (VSS) and 17 (VDD) must have a 0.1µF ceramic capacitor placed within 5mm of the IC to suppress switching noise. Additionally, a 10µF electrolytic capacitor should be near the power entry point on the PCB. The (also identified as 1N518 ) is a
If internal temperatures cross safe operating limits (typically around 150°C), the Thermal Shutdown circuit turns off the internal driver stage until the device cools. Simultaneously, Cycle-by-Cycle Current Limiting prevents damage during short circuits. 4. Practical Application Circuit Layout
The internal block diagram of the IN518 contains several coordinated subsystems that regulate raw voltage into a smooth, clean power output. Pulse Width Modulation (PWM) Controller
Despite the manufacturer (INX) not having released a comprehensive public datasheet, the collective knowledge of electronics engineers and repair technicians has mapped out the critical functions of the IN518 pins. Because the chip is a PMIC, the pins are generally categorized into four main groups: Power Input, Power Output (Generated Rails), Control/Signaling, and Feedback. Detailed Pin Function Analysis If IN518 is on
Feedback Pin. Monitors output voltage/current to maintain regulation. OVP
The IN518 is responsible for generating critical voltages required for the operation of an LCD screen. Based on available schematic data, here are the primary pins and power rails typically associated with this IC: VGH (Voltage Gate High): Typically found on