The TLC6C5748-Q1 is 48-channel, 30-mA, constant-current LED driver that can control LED on-time with pulse width modulation (PWM) in 65,536 steps for grayscale (GS) control. A maximum of 281 trillion colors can be generated with red, green, and blue LEDs connected to the constant-current outputs.

The device has a 128-step, 7-bit, output current control function called dot correction (DC) that can control each constant-current output. Inherently, LED lamps have different intensities resulting from manufacturing differences. The DC function can reduce the inherent differences in intensity and improve LED lamp brightness uniformity.

The device also has a 128-step, 7-bit, output current control function called global brightness control (BC) that can control each color group output. The BC function can adjust the red, green, and blue LED intensity for true white with constant-current control. The device contributes higher image quality to LED displays with fine white balance tuning by using these GS, DC, and BC functions.

The display controller can locate LED lamp failures via the device because the controller can detect LED lamp failures with the LED open detection (LOD) and LED short detection (LSD) functions and the reliability of the display can be improved by the LOD, LSD function.

The device maximum constant-current output value can be set by internal register data instead of the general method of using an external resistor setting. Thus, any failure modes that occur from the external resistor can be eliminated and one resistor can be eliminated.

The device constant-current output can drive approximately 19 mA at a 0.25-V output voltage and a +25°C ambient temperature. This voltage is called knee voltage. This 0.25-V, low-knee voltage can contribute to the design of a lower-power display system. The total number of LED drivers on one display panel can be reduced because 48 LED lamps can be driven by one LED driver.