The IS31FL3248-QFLS4-TR from Lumissil Microsystems is a 48-Channel Constant Current LED Driver IC that has been designed to provide precise control of current over all 48 channels. It requires a DC supply of 3.0 – 5.5 V and provides an output current of 33.6 mA. This LED driver offers 16-bit PWM brightness control per channel to ensure high-quality and accurate brightness adjustments. It also provides constant-current scaling (SL) in step 64, thereby allowing for precise adjustments to minimize brightness deviation between channels. This driver incorporates the global current control (GCC) feature, which enables the adjustment of brightness deviation between the red (R), green (G), and blue (B) color groups to ensure uniform illumination across different color channels. It has an 8-step maximum current band control (CB) that allows the selection of the maximum output current range for all channels, providing flexibility in current control.

This IC utilizes proprietary programmable algorithms to minimize audible noise that may arise from MLCC decoupling capacitors, thus ensuring a clean and noise-free operation. It can easily configure SL, GCC, CB, and other registers through the high-speed VSB or SPI serial interface ports, which results in net data transfer rates of up to 33 MHz. This RoHS-compliant driver IC features a software shutdown mode, allowing the device to enter a sleep state while retaining all register values and significantly reducing power consumption, making it ideal for applications where energy efficiency is crucial. It is available in a surface-mount package that measures 8 x 8 mm and is ideal for mini LED backlight, center information display, and LED video display applications.