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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.
MBIA045 Specification
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ItemsSpec.Content
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01Scan TypeStatic
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02No. of Output Channel16
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03Output Current per Channel1~45mA
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04Sustaining Output Voltage17V
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05Excellent Output Current Accuracy-between channels<±2.0％ (typ.)
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06Excellent Output Current Accuracy-between ICs<±2.5％ (typ.)
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07Embedded MOSFET
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08Supply Voltage3.3V~5V
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09Control InterfaceProprietary SPI-Like
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10Scan Design
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11LED Matrix Configuration
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12Error Detection - LED Open
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13Error Detection - LED Short
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14Error Detection - LED Pixel Short
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15Current Gain6-bit
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16Intelligent Power Saving
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17PWM16-/10-bit
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18I/O LevelVDD
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19Ghosting Effect Elimination
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20EMI Noise ReductionChannel output Shift；PWM Forward/ Backward Counting
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21Auto Breath Lighting Function
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22Protection - Thermal Shutdown
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23Protection - OCP
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24RoHS Compliant PackageSSOP24
QFN24 -
25Major ApplicationsLED Lighting for gaming keyboard, home appliance
