Inx In518 Ic Pinout Diagram Top [exclusive]

: Pin numbers increment sequentially in a counter-clockwise direction around the perimeter of the chip starting from Pin 1.

Note: The IN518 is a proprietary, custom-programmed chip. While the pin numbering follows the standard QFN layout, the specific functions may vary slightly depending on the customer code (e.g., IN518-NT02, IN518-N03). The data below represents the most common configuration found on T-Con boards.

Samples voltage or current lines to adjust internal regulation dynamically. Logic Input

| Pin No. | Pin Name | Function Description | | :--- | :--- | :--- | | | EN | Enable Pin: Active high. Logic high (>1.2V) enables output. Tie to VIN if unused. | | 2 | GND | Ground: Common reference for input and output. Connect to system ground plane. | | 3 | IN | Input Voltage: Unregulated supply input. Bypass with a 1µF – 10µF ceramic capacitor to GND. | | 4 | BYPASS / NR | Bypass/Noise Reduction: Connect a 10nF – 100nF capacitor to GND to reduce output noise. | | 5 | NC / FB | No Connect or Feedback: On fixed-output versions, this pin is NC. On adjustable versions, it connects to a resistor divider. | | 6 | OUT | Regulated Output: Provides stable output voltage. Needs a 1µF – 10µF capacitor to GND. |

Always use a high-precision digital multimeter. Measure the voltages on the IC's power pins to confirm VDDcap V sub cap D cap D end-sub (Logic power, usually 3.3V3.3 cap V VGHcap V sub cap G cap H end-sub (Gate High, usually 25V25 cap V 30V30 cap V VGLcap V sub cap G cap L end-sub (Gate Low, usually -5Vnegative 5 cap V -10Vnegative 10 cap V inx in518 ic pinout diagram top

To troubleshoot an IN518 failure via its pinout, a technician must understand what voltages are expected at the external test points surrounding the chip:

A operating at a high switching frequency powers an internal MOSFET to step down the 12V input to the 3.3V logic supply, often in a buck converter topology. The same PWM core is repurposed in a boost topology to generate the 17.9V VAA rail and the high 30.4V VGH supply.

: Typically sits between +13V and +17V DC . It powers the source driver ICs responsible for rendering individual color column scales.

: When soldering, use a hot air rework station set to 280°C for approximately 15–20 seconds. Ensure the chip's notch or dot matches the PCB marking to avoid incorrect orientation. : Pin numbers increment sequentially in a counter-clockwise

Logic high enables the IC, while logic low turns it off, reducing power consumption.

When looking at the of the IC (the side with the writing on it):

The part might be an NEC PS518 or similar optocoupler.

The is a highly specialized, multi-channel DC-to-DC power management and gamma reference integrated circuit primarily utilized on T-CON (Timing Controller) boards in LCD and LED television display panels . Manufactured for high-density panel applications (such as 24-inch to 50-inch displays produced by brands like Innolux/INX), the IN518 acts as the central power hub. It generates critical internal voltage rails ( VGHcap V sub cap G cap H end-sub VGLcap V sub cap G cap L end-sub AVDDcap A cap V sub cap D cap D end-sub VGHPcap V sub cap G cap H cap P end-sub The data below represents the most common configuration

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To understand the IN518 's role, it helps to know where it's found. It is a key component on the , which acts as the interface between a TV's main processor and the LCD panel itself. Here, its job is to convert the board's input voltage (often 12V) into several highly accurate, regulated outputs required by the panel's row and column drivers. These outputs include essential supply rails like VGH (gate high voltage, often around 25-30V), VGL (gate low voltage, often around -5V to -8V), and VAA (analog supply, often around 15-18V).