Macroblock MBI5045 S-PWM [16-Channel] (Error Detection)
16-Channel Constant Current LED Driver with Low Knee Voltage
MBI5045 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with selectable 16-bit color depth which features a 16-bit shift register to convert serial input data into each pixel gray scale of output port, and is a 16-channel constant current LED driver with VDS=0.2V @ IOUT=20mA, which is excellent compared to the conventional design. MBI5045 is especially designed for low power consumption LED display applications. The low knee voltage (LKV) design makes MBI5045 work at a constant output current with low VDS and still guarantees PrecisionDrive™ feature. The output current can be preset through an external resistor. Moreover, the preset current of MBI5045 can be further programmed to 64 gain steps for LED global brightness adjustment.
With Scrambled-PWM (S-PWM) technology, MBI5045 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. MBI5045 offloads the signal timing generation of the host controller which just needs to feed data into drivers. MBI5045 drives the corresponding brightness of LEDs by specifying image data. With MBI5045, all output channels can be built with 16-bit color depth (65,536 gray scales). Each LED’s brightness can be calibrated with the compensated gamma correction or LED deviation information inside the 16-bit image data.MBI5045 provides a silent error detection which detects LED open circuit error and the execution won’t be observed.
No. of Output Channel: 16
Sustained Output Voltage: 17V
Output Current per Channel: 2~45mA
Output Current Accuracy-between channels: <±3.0% (typ.)
Output Current Accuracy-between ICs: <±3.0% (typ.)
Features: GCLK Multiplier, Low Knee Voltage, Error Detection: LED Open, Lower Ghosting Effect Elimination
Packages: SOP24, SSOP24