Macroblock`s (www.mblock.com.tw) MBI5101 is designed for LED TV backlight applications using internal Pulse Width Modulation (PWM) control with 12-bit color depth.
The MBI5101 features a 192-bit shift register which converts serial input data into 12-bit gray scale data of each output port. At MBI5101 output port, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs with a wide range of VF variations.
The output current can be preset through an external resistor. Moreover, the preset current of MBI5101 can be further programmed to 128 gain steps for LED global brightness adjustment.
MBI5101 drives the corresponding LEDs to the brightness specified by image data.
With MBI5101, all output channels can be built with 12-bit color depth (4,096 gray scales). Each LED’s brightness can be calibrated from minimum to maximum brightness with compensated gamma correction or LED deviation information inside the 12-bit image data.