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MBIA045 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with selectable 16/10-bit color depth which features a 16/10-bit shift register which converts serial input data into each pixel gray scale of output port. The output current can be preset through an external resistor. Moreover, the preset current of MBIA045 can be further programmed to 64 gain steps for LED global brightness adjustment.
With Scrambled-PWM (S-PWM) technology, MBIA045 enhances Pulse Width Modulation by scrambling the “on” time into several “on” periods. The enhancement equivalently increases the visual refresh rate. When building a 16-bit color depth video, S-PWM reduces the flickers and improves the fidelity. MBIA045 offloads the signal timing generation of the host controller which just needs to feed data into drivers. MBIA045 drives the corresponding LEDs to the brightness specified by image data. With MBIA045, all output channels can be built with up to 16-bit color depth (65,536 gray scales). Each LED’s brightness can be calibrated enough from minimum to maximum brightness with compensated gamma correction or LED deviation information inside the 16-bit image data. For time-multiplexing LED displays, MBIA045 featured pre-charge to eliminate the lower-ghosting effect induced by parasitic capacitance of the board. Output shift and selectable counting direction reduce power turbulence during operation of LED driver.