Inx: In518 Ic Pinout Diagram [best]

: Distributing precise voltages to the LCD glass and driver chips. Gamma Correction

Connect to your output node using a voltage divider network if voltage regulation is required. Proper calibration ensures the IC maintains output stability under varying load conditions. Common Applications

The FB pin constantly monitors the voltage coming off the output filter. An internal error amplifier compares the FB voltage to an internal reference voltage (usually 0.8V or 0.925V). If the output drops, the loop increases the duty cycle of the SW pin to bring the voltage back to target. Inx In518 Ic Pinout Diagram

┌─────────────────────────────────────┐ │ 1 VIN VDD_Logic 28 │ │ 2 EN GND_Analog 27 │ │ 3 POK AVDD_OUT 26 │ │ 4 VREF_IN VGH_OUT 25 │ │ 5 FB_AVDD VGL_OUT 24 │ │ 6 FB_VCOM VCOM_OUT 23 │ │ 7 GND_PWR Gamma_Ref1 22 │ │ 8 SW_AVDD Gamma_Ref2 21 │ │ 9 LXD_VGH Gamma_Ref3 20 │ │10 LXD_VGL Gamma_Ref4 19 │ │11 CLK_IN Gamma_Ref5 18 │ │12 SD_IN Gamma_Ref6 17 │ │13 GND_Logic SDA (I2C) 16 │ │14 SCL (I2C) NC 15 │ └─────────────────────────────────────┘

The INX IN518 is a monolithic IC designed to provide reference gamma voltages for TFT-LCD panels. Gamma correction is essential because the relationship between the voltage applied to a liquid crystal cell and the light transmittance (brightness) is non-linear. The IN518 ensures that the colors displayed are accurate and that shades of grey transition smoothly. Key features often associated with this IC include: High-accuracy reference voltages. Low-power consumption. Multiple output channels to drive gamma buffers. INX IN518 IC Pinout Diagram Overview : Distributing precise voltages to the LCD glass

This pin regulates the output voltage. Connect it to the center tap of an external resistor divider network connected between the output voltage and GND. 6 COMP / VOUT

Understanding its pinout is the first step to successful troubleshooting or integration. Common Applications The FB pin constantly monitors the

Never substitute an IN518 with a general comparator IC like the LM339, as their internal architectures are fundamentally different despite any perceived pin similarities.

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

Last updated: 2025 – Verified against INX IN518 Rev C datasheet and field repair data.