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MBI5353 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with selectable 16 /15 /14 / 13-bit color depth. MBI5353 features a 48-bit shift register which converts serial input data into each pixel’s gray scale of the output port. The forty-eight 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 1:32 time-multiplexing applications. Users only need to send the whole frame data once and to store in the embedded SRAM of the LED driver, instead of sending every time when the scan line is changed. It helps to save the data bandwidth and to achieve high grayscale with very low data clock rate. With scan-type Scrambled-PWM (S-PWM) technology, MBI5353 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. In addition, the innovative GCLK multiplier technique doubles visual refresh rate.
MBI5353 drives the corresponding LEDs to the brightness specified by image data. With MBI5353, all output channels can be built with 16-bit color depth (65,536 gray scales). When building a 16-bit color depth video, S-PWM technology reduces the flickers and improves the image fidelity.
Through compulsory error detection, MBI5353 detects individual LED for open-circuit errors without extra components. MBI5353 equips an innovative cross elimination function, and it solves the cross phenomenon induced by failure LEDs. Besides, integrated ghost elimination circuit eases the ghost problems. To further reduce power consumption of LED display, a built-in smart power saving mode will shut driver IC down when grayscale data is zero.
MBI5353 產品規格
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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 Channel48
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04Output Current per Channel0.5~20mA
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05Sustaining Output Voltage7V
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06Excellent Output Current Accuracy-between channels<±1.5％ (typ.)
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07Excellent Output Current Accuracy-between ICs<±1.5％ (typ.)
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08Embedded MOSFET
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09Scan DesignUp to 32-scan
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10Error Detection - LED Open
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11Error Detection - LED Short
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12Current GainGlobal/RGB
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13PWM Enhancement
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14GCLK Multiplier
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15Intelligent Power Saving
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16S-PWM13/14/15/16-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 PackageQFN56
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25Major ApplicationsTime-multiplexing LED display
