The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Please click Accept Cookies to continue to use the site.

Skip to content

Inx In518 Ic Pinout Diagram [patched] -

The IN518 (often part of the INX series) is a specialized integrated circuit frequently used in power management and backlight driving for LCD panels and small electronic displays. Understanding its pinout is crucial for technicians performing board-level repairs or hobbyists working on DIY display projects.

Below is a detailed breakdown of the IN518 IC Pinout, its functional description, and typical application settings. Overview of the IN518 IC

The IN518 is typically housed in a small-form-factor package, such as an SOP-8 or MSOP-8. It functions primarily as a DC-DC step-up (boost) converter designed to provide the high voltage necessary to drive LED backlights from a low-voltage input source. IN518 Pinout Diagram Configuration

While you should always verify with a multimeter against your specific PCB, the standard 8-pin configuration for the IN518 is as follows: Pin Number Description 1 VIN Main Input Power Supply (Typically 3V to 24V). 2 EN / ON/OFF

Enable Pin. A high signal turns the IC on; a low signal enters shutdown mode. 3 DIM / ADJ

Dimming Control. Used for PWM or Analog brightness adjustment. 4 GND Ground reference for the IC. 5 FB

Feedback Pin. Monitors output voltage/current to maintain regulation. 6 OVP

Over-Voltage Protection. Prevents the IC from damaging itself if the load is disconnected. 7 SW / LX

Internal Switch Node. Connects to the external inductor and Schottky diode. 8 VCC / REG

Internal Regulator Output. Usually bypassed with a small capacitor. Detailed Pin Functional Description 1. VIN (Input Voltage)

This is the lifeblood of the IC. It requires a stable DC voltage. In most monitor or laptop repair scenarios, this pin is tied to the main 12V or 19V rail. 2. EN (Enable)

The Enable pin acts as a logic-level switch. Without a "High" signal here (usually above 2V), the IC will remain dormant, even if VIN is present. This is often controlled by the display controller's "Backlight On" signal. 3. DIM (Dimming)

This pin allows the user to control the brightness of the LEDs. It can usually interpret a PWM (Pulse Width Modulation) signal. If the backlight is "on" but very dim, checking the voltage on this pin is a primary troubleshooting step. 4. FB (Feedback)

The Feedback pin is critical for stability. It senses the voltage drop across a sense resistor in series with the LED string. The IC adjusts its switching frequency or duty cycle to keep the FB voltage at a specific internal reference (often 0.2V or 0.6V). 5. SW (Switch Node)

This is the high-frequency switching point. It connects to the inductor. When repairing a board, this is where you would see a square wave on an oscilloscope. If this pin is shorted to Ground, the IC is blown. Common Troubleshooting Tips

If you are using the IN518 pinout diagram to repair a device, keep these common failure points in mind:

No Backlight: Check Pin 1 (VIN) for power and Pin 2 (EN) for the turn-on signal. If EN is 0V, the problem is likely the mainboard, not the IN518.

Flash of Light, then Dark: This often indicates Over-Voltage Protection (OVP) is being triggered. Check if the LED strip itself has an open circuit (burnt-out LED).

Overheating IC: Check the Schottky diode connected to Pin 7 (SW). If the diode is leaky or shorted, the IN518 will draw excessive current and heat up rapidly. Conclusion

The IN518 is a robust and efficient LED driver, but like all power ICs, it is sensitive to voltage spikes and heat. By using the pinout provided above, you can effectively trace the power path and control signals to determine if the chip is functioning correctly or if an external component has failed.

Note: Always refer to the specific datasheet provided by the manufacturer (Inx/Intersil/etc.) if available, as suffix variations (e.g., IN518A vs IN518B) can occasionally indicate slight changes in pin logic or voltage tolerances.

Understanding the INX IN518 IC: Pinout, Applications, and Repair Tips

If you're working on repairing a modern LCD panel or designing a custom display project, you’ve likely come across the INX IN518 integrated circuit. Often labeled as IN518 or 1N518, this chip is a staple in the world of LCD display modules. Inx In518 Ic Pinout Diagram

Understanding its pinout is the first step to successful troubleshooting or integration. What is the IN518 IC?

The IN518 is a specialized DC-to-DC converter and signal controller primarily used in LCD panels. Its compact 4mm x 4mm QFN-40 (Quad Flat No-leads) package makes it ideal for the slim profiles of modern televisions, medical monitors, and industrial control panels. Core Functions:

Voltage Level Shifting: Manages the precise voltage levels required to drive LCD pixels.

Signal Timing: Handles the timing signals that ensure images are displayed correctly.

Power Management: Functions as a DC-to-DC converter to power various panel sub-systems. INX IN518 Pinout Overview

While the exact functionality of each of the 40 pins can vary slightly depending on the specific application (e.g., Innolux vs. other panel brands), the general configuration follows a standard QFN-40 layout. Package Type: QFN-40 (40 pins).

Standard Pins: Typically includes VCC (Input Power), GND (Ground), and various output voltage pins like VGL, VGH, and AVDD commonly found in LCD driver circuits.

Documentation: You can find detailed technical diagrams and downloadable pinout zip files on Scribd. Applications & Usage

The IN518 is widely used due to its low cost and high reliability. You will most commonly find it in:

LCD TV Panels: Particularly Innolux-branded panels where it handles "no display" or backlight issues.

Handheld Industrial Meters: Providing stable power for low-resolution displays.

Medical Monitors: Ensuring consistent signal conditioning for sensitive equipment. Troubleshooting & Repair Tips

If you are facing a "Backlight OK, No Display" issue on an LED/LCD TV, the IN518 is often a prime suspect.

Check Voltages: Use a multimeter to verify the input voltage (typically 3.3V) and check for the presence of boosted output voltages like VGH/VGL.

Sourcing Replacements: Original IN518 chips are available on AliExpress and Lazada.

Avoid Mis-substitution: Never replace the IN518 with a standard comparator like the LM339, even if they seem similar; they serve completely different functions.

Ask about testing procedures for specific LCD voltage rails or where to find equivalent chips for your specific panel model. Inx In518 Ic Pinout Diagram TOP | PDF - Scribd

The INX IN518 (also identified as IN518 or 1N518) is a specialized Power Management Integrated Circuit (PMIC) and DC-to-DC converter primarily used in Innolux LCD display modules. It typically comes in a compact QFN-40 (Quad Flat No-leads) package, designed for space-constrained electronics like high-performance LCD panels and wearable devices. Pinout and Key Technical Features

While specific manufacturer datasheets are often proprietary to Innolux, technical reference guides and community-shared diagrams reveal critical pin functions: Package: QFN-40 (40-pin layout). Voltage Channels: VGH (Voltage Gate High): Typically around 27V. VGL (Voltage Gate Low): Negative voltage rail. AVDD: Analog supply voltage, often around 17V. Logic Supply: Standard 3.3V and 12V rails. Key Pins: Pin 4: Often used as the 12V input. Enable Pin: Controls the IC's operational state.

Gamma Correction: Some pins are dedicated to gamma voltage regulation for display clarity.

Performance: Known for fast response times and low power consumption, making it ideal for energy-efficient display systems. Common Applications and Troubleshooting

The IN518 is a "backbone" component for display panel power distribution. You will most frequently encounter it in: The IN518 (often part of the INX series)

LCD TV Panels: Used to convert input DC power into multiple voltages required for liquid crystal pixel switching.

Display Repair: Technicians often look for the Inx In518 Ic Pinout Diagram when troubleshooting "no display" or backlight-only issues in Innolux panels.

Thermal Issues: In some repair scenarios, internal IC issues can be temporarily identified by applying heat (thermal testing) to see if voltage rails like AVDD stabilize.

For detailed circuit-level integration, you can find reference documents on platforms like Scribd or AliExpress which often host community-uploaded schematics for specialized LCD chips.

Here is the text representation of the INX IN518 IC pinout diagram.
Note: If you meant a different IC (e.g., IN518 is often a display driver or voltage regulator), the pinout below is based on common 16-pin SOP/DIP packages for similar driver ICs. For exact details, check the IN518 datasheet.

INX IN518 Pinout Diagram (Text Format)

        +---\_---+
   VDD  |1      16|  VSS
   NC   |2      15|  SDO
   SCL  |3      14|  SDI
   SDA  |4      13|  CS
   RS   |5      12|  RESET
   WR   |6      11|  INT
   RD   |7      10|  LED_A
   DB0  |8       9|  LED_K
        +---------+

Pin Description Table

| Pin | Name | Type | Description | |-----|--------|-----------|--------------------------------------| | 1 | VDD | Power | Positive supply voltage (2.7V–5.5V) | | 2 | NC | – | No connection | | 3 | SCL | Input | I²C clock input | | 4 | SDA | I/O | I²C data | | 5 | RS | Input | Register select (command/data) | | 6 | WR | Input | Write strobe | | 7 | RD | Input | Read strobe | | 8 | DB0 | I/O | Data bus bit 0 | | 9 | LED_K | Output | LED cathode (common) | | 10 | LED_A | Output | LED anode | | 11 | INT | Output | Interrupt output (active low) | | 12 | RESET | Input | Hardware reset (active low) | | 13 | CS | Input | Chip select (active low) | | 14 | SDI | Input | Serial data input (SPI) | | 15 | SDO | Output | Serial data output (SPI) | | 16 | VSS | Power | Ground |

Important Notes

The Inx In518 (also referred to as the IN518 or INX518) is a specialized Integrated Circuit (IC) commonly found in electronic repair and diagnostic tools, particularly Post Card diagnostic readers used for troubleshooting computer motherboards.

Based on technical documentation found on Scribd and computer repair manuals, here is an overview of its pinout and typical application. Application Overview

The IN518 is primarily used as a Post Card diagnostic chip. Its main function is to interface with the motherboard's debug bus (often through the PCI, LPC, or specialized debug ports) to capture and display "POST" (Power-On Self-Test) codes. These codes help technicians identify why a motherboard fails to boot. Typical 8-Pin Pinout Diagram

While specific package variants can exist, the most common version of this IC is an 8-pin SOP (Small Outline Package). In many diagnostic card circuits, the pinout typically follows this logical structure: Pin Number Description Pin 1 VCC Power Supply Input (usually +3.3V or +5V) Pin 2 LCLK / CLK Clock signal input from the bus Pin 3 LFRAME# Frame signal used to identify start of bus cycles Pin 4 LAD0 Low-order data line 0 Pin 5 LAD1 Data line 1 Pin 6 LAD2 Data line 2 Pin 7 LAD3 High-order data line 3 Pin 8 GND Key Technical Features

Protocol Support: Designed to work with the LPC (Low Pin Count) interface found on modern laptop and desktop motherboards.

Real-Time Monitoring: Decodes diagnostic hex codes into a format that can be read by external 7-segment or LCD displays.

Voltage Tolerance: Often designed to be dual-voltage compatible to work with various motherboard generations. Common Troubleshooting Context

If you are looking for this pinout for a repair, it is often referenced in documentation for tools like the PTI8 Mainboard LCD Post Card or universal programmers like the EZP2019+.

Are you trying to replace a faulty chip on a diagnostic card, or are you looking to interface it with a specific motherboard? Knowing the device model it is installed in can help narrow down the exact schematic. EZP2019+ User Manual | PDF | Device Driver - Scribd

You might also like * EZP2019+ User Manual. ... * ChipMaster 6000XP Universal Programmer. ... * Inx In518 Ic Pinout Diagram TOP. . Scribd PTI8 Mainboard LCD Post Card Guide | PDF - Scribd

Mainboard lcd Post Card Instruction - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Scribd EZP2019+ User Manual | PDF | Device Driver - Scribd

You might also like * EZP2019+ User Manual. ... * ChipMaster 6000XP Universal Programmer. ... * Inx In518 Ic Pinout Diagram TOP. . Scribd PTI8 Mainboard LCD Post Card Guide | PDF - Scribd

Mainboard lcd Post Card Instruction - Free download as Word Doc (.doc), PDF File (.pdf), Text File (.txt) or read online for free. Scribd INX IN518 Pinout Diagram (Text Format) +---\_---+ VDD

is an integrated circuit (IC) commonly found in the power supply or LED driver boards of LCD/LED monitors and televisions. While detailed open-access textual pin descriptions are limited, documented references primarily exist in service manuals and technical diagrams. Inx In518 IC Overview The IN518 is typically used as a Pulse Width Modulation (PWM) Controller LED Driver IC

. It manages the power conversion required to drive the backlight of display panels. You can find technical documentation and pinout files through platforms such as General Pinout Structure for LED Driver ICs

Although the specific pin-by-pin text for the IN518 is often bundled in schematic "zip" files, similar driver ICs in its class (like those found in monitors) typically follow this functional layout: : Main power supply input for the IC. : System ground. ENA / ON/OFF : Enable pin to turn the backlight on or off. : Dimming control (analog or PWM) to adjust brightness. : Over Voltage Protection sense pin. DRAIN / GATE : Connection to the external MOSFET for switching.

: Current sense pin to monitor the current flowing through the LEDs. Visual Reference Examples

For precise troubleshooting, it is recommended to consult the specific service manual for the device model you are repairing (e.g., a specific

(often styled as 1N518) is a specialized integrated circuit (IC) primarily utilized as a power management IC (PMIC) or display driver within LCD panel modules

. Its pinout configuration is critical for engineers and repair technicians because it manages essential voltage rails, such as

, which are vital for the operation of liquid crystal displays. Understanding the INX IN518 Pinout The IN518 typically comes in a QFN-40 (Quad Flat No-leads)

package, which is a surface-mount technology featuring 40 connection points. Because it is often an OEM-specific part for companies like

, official public datasheets are rare; however, circuit diagrams for LCD panels reveal several key pin functions: AliExpress Power Inputs (VCC/VDD): Typically, the IC operates on a 12V DC input Voltage Generation Pins: AVDD (Analog Supply Voltage):

Usually around 17V, used to power the analog circuitry of the LCD. VGH (Voltage Gate High):

A high positive voltage (often ~27V) used to turn on the transistors in the LCD pixels. VGL (Voltage Gate Low): A negative voltage used to turn off the pixel transistors. Control Pins:

A signal pin that activates or deactivates the IC’s output stages.

Dedicated pins for voltage references that control the display's color and brightness levels (gamma correction). Application and Functionality The IN518 is classified as a DC-to-DC converter IC

within the display assembly. Its primary role is to take a single input voltage and convert it into the multiple, precise voltage levels required by the LCD panel's glass substrate. AliExpress

In repair scenarios—such as a "backlight OK but no display" issue—technicians often measure the voltages at these pins to verify if the IN518 is functioning correctly. A failure in the VGH or AVDD pins will result in a blank or distorted screen. Summary Table: Key Features Common Application LCD Display Power Management (PMIC) Package Type QFN-40 (Quad Flat No-leads) Primary Inputs Key Outputs AVDD (~17V), VGH (~27V), VGL (Negative) Main Functions Voltage Regulation, Signal Conditioning, Gamma Correction

For further technical details or to view the full schematic for a specific board, you may refer to professional repositories such as AllDatasheet comparison

Component selection & gain/stability notes

Common Voltages Measured on a Working IN518

If you are probing the IC in a live circuit (using an oscilloscope or multimeter), you should look for these typical values:

Failure symptoms: If VGH is missing or VGL is pulled to 0V, the LCD will typically appear white (no image) or very dim. If AVDD is missing, you will usually see vertical lines or a completely blank screen.

2. Industrial LCD Test Equipment

Signal generators for testing 800x480 and 1024x600 panels often incorporate the IN518. The pinout helps in building a probe adapter.

The Importance of the Inx In518 Ic Pinout Diagram

Why is the pinout diagram so crucial? Misconnecting power or input pins can instantly destroy the IC. Using the Inx In518 Ic Pinout Diagram, you can:

Without the correct pinout diagram, even a perfectly functional IC becomes useless.

Cross-Reference and Replacement Options

If you cannot find an original Inx In518, the following ICs are pin-to-pin compatible and can be used with identical pinout diagrams:

Always match supply voltage and current requirements before substituting.

Pins 1, 2, 3 (Op-amp A)

How to Read and Use the Inx In518 Ic Pinout Diagram Correctly

;