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MBI5056 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with selectable 14/13-bit grayscale resolution. With Macroblock’s proprietary S-PWM technology, it is able to reduce flickers and improves image fidelity. MBI5056 features a 16-bit shift register that converts serial input data into each pixel’s grayscale of the 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. The innovative architecture with embedded SRAM is designed to support up to 1:8 time-multiplexing applications. Users only need to send the whole frame data once and store it in the embedded SRAM of the LED driver, instead of sending it every time when the scan line is changed. It helps to save the data bandwidth and to achieve high grayscale with a very low data clock rate. With scan-type Scrambled-PWM (S-PWM) technology, MBI5056 enhances PWM by scrambling the “on” time of each scan line into several “on” periods and sequentially drives each scan line for a short “on” period. The enhancement equivalently increases the visual refresh rate of scan-type LED displays.
Through compulsory error detection, MBI5056 detects individual LEDs for open-circuit errors without extra components. MBI5056 is equipped with an innovative cross-elimination function, as it solves the cross phenomenon induced by failure LEDs. Besides, integrated ghost elimination circuit eases the ghost problems.
MBI5056 Specification
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ItemsSpec.Content
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01LED TypeCommon anode
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02Scan TypeTypical
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03No. of Output Channel16
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04Output Current per Channel2~45mA
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05Sustaining Output Voltage17V
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06Excellent Output Current Accuracy-between channels<±2.5％ (typ.)
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07Excellent Output Current Accuracy-between ICs<±3.0％ (typ.)
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08Embedded MOSFET
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09Scan DesignUp to 8-scan
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10Error Detection - LED Open
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11Error Detection - LED Short
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12Current Gain8-bit
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13PWM Enhancement
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14GCLK Multiplier
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15Intelligent Power Saving
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16S-PWM13/14-bit
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177 Challenges - Ghosting Elimination
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187 Challenges - High Contrast Interference Elimination
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197 Challenges - Color Shift Elimination
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207 Challenges - Non-uniformity (IC Controlled)Elimination
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217 Challenges - Dim Line at the First Line Elimination
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227 Challenges - Gradient Dim Line Elimination
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237 Challenges -Dead Pixel Isolation
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24RoHS Compliant PackageSSOP24
QFN24 -
25Major ApplicationsVMS
Time-multiplexing LED display
