| Pin # | Name | Type | Description (Typical for IN518) | |-------|------|------|--------------------------------| | 1 | VDD | Power | 3.3V supply | | 2 | GND | Ground | Ground | | 3 | IF_P | Output | I/Q Positive signal output | | 4 | IF_N | Output | I/Q Negative signal output | | 5 | GND | Ground | Ground | | 6 | VCO_IN | Input | VCO tuning voltage | | 7 | GND | Ground | Ground | | 8 | CLK_IN | Input | Reference clock input | | 9-16 | NC | - | Not connected internally | | 17-24 | NC | - | Not connected internally | | 25 | GND | Ground | Ground | | 26 | RESET | Input | Chip reset (active low) | | 27 | GND | Ground | Ground | | 28 | VDD_PA | Power | Power amplifier supply | | 29 | RF_OUT | Output | Transmitter RF output | | 30 | GND | Ground | Ground | | 31 | VDD | Power | 3.3V supply | | 32 | GND | Ground | Ground |
Center Pad (Exposed Die Pad): Must be connected to GND for proper thermal and electrical performance.
The INX IN518 from a top-down pinout perspective is a systematic QFN-48 device with clear separation of power (left side), I2C/host (top-left), TX drivers (left-to-bottom), RX inputs (bottom-to-right), and analog (right side). Proper layout respects the analog/digital ground split near pin 34 and ensures the charge pump capacitor on pin 36 is placed within 5mm for stable touch sensing.
Design tip: When viewing the IC from the top, always identify the index mark at pin 1 (top-left) before routing – rotating the pinout 90° is the most common assembly error.
Would you like a PCB footprint diagram (top view with exact pad dimensions) or the I2C register map for this IN518 controller?
(also referred to as ) is a high-performance DC-to-DC converter IC specifically designed for use in LCD LED TV T-CON boards . It is typically found in a QFN-40 package (Quad Flat No-leads with 40 pins). Pinout and Functional Diagram inx in518 ic pinout diagram top
While a full 40-pin table is often proprietary, technical analysis and live data sheets identify these critical functional pins and zones: Input Power (VCC/VIN): 12V DC input from the main board. AVDD Switching Pin:
Connected to an external AVDD coil; it handles the internal switching to generate the primary boost voltage. High Voltage Outputs (AVDD/H-AVDD): Generates output voltages (often around ) required for driving the LCD panel. Gate Drive Output:
Uses an internal or external MOSFET to drive the "all gate" (COF) supply lines. Feedback/Protection Pins:
Monitor for shortages; if a shortage occurs on the output, these pins can trigger a protection mode to prevent board damage. Key Specifications & Features Package Type:
(6x6mm approximately) designed for space-constrained T-CON boards. Applications: Primarily used in Innolux (INX) Decoding the INX IN518: Complete Pinout Diagram, Top
and other LCD panels for signal conditioning, voltage regulation, and power management. Common Versions:
Variants include T01, T02, T03, and NT02, which represent specific hardware revisions or performance improvements. Troubleshooting Insights Short Circuit Faults:
Shortages in the output lines often lead to "no display" faults. If the AVDD voltage is missing, check the input 12V and the switching coil. Heat Sensitivity:
Some technicians report that applying heat to the IC can temporarily resolve certain internal logic issues, though this is usually a diagnostic step rather than a permanent fix. You can find replacements from retailers such as AliExpress or specific test point voltages for a particular TV model? AI responses may include mistakes. Learn more
However, "inx" is a very common typo for "IX" (IXYS Corporation) or "IN" (Fairchild/ON Semiconductor), and the part number "518" fits perfectly with the IXYS naming convention. Place C1 and C2 as close as possible
It is highly likely you are looking for the IXYS IX518 or a similar 8-pin surface mount component.
Here is the deep guide for the IXYS IX518 (and how to read similar 8-pin ICs), assuming the "INX" was a typo for "IX".
| IC | Package Top View | TX/RX Max | I2C Speed | |---------|------------------|-----------|-----------| | IN518 | QFN-48, 7x7mm | 12/12 | 400 kHz | | IN520 | QFN-64, 9x9mm | 16/20 | 1 MHz | | IN505 | QFN-32, 5x5mm | 8/8 | 400 kHz |
To understand why the pinout matters, one must understand the function. The 1N518 is a Silicon Switching Diode. Its primary role is to allow current to flow in one direction while blocking it in the reverse direction, often at high speeds.
Key Datasheet Parameters:
If the part is an IX518 (likely a MOSFET Driver or Gate Driver), it typically comes in a small surface-mount package. Identifying the "Top" view is critical for correct installation.