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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 can reduce flickers and improve 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 whenever the scan line is changed. It helps to save the data bandwidth and to achieve high grayscale with a meager 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.
MBI5056 detects individual LEDs for open-circuit errors without extra components through compulsory error detection. It is equipped with an innovative cross-elimination function, which solves the cross phenomenon induced by failure LEDs. Besides, an integrated ghost elimination circuit eases ghost problems.
MBI5056 产品规格
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ItemsSpec.Content
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01输出通道数16
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02每通道输出电流值2~45mA
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03输出管脚耐压17V
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04输出电流精确度-通道间<±2.5% (typ.)
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05输出电流精确度-IC间<±3.0% (typ.)
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06扫描设计最高8扫
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07PLL
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08错误侦测-LED开路
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09错误侦测-LED短路
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10错误侦测-漏电流
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11电流增益
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12省电功能
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13RoHS环保封装SSOP24
QFN24 -
14主要应用室内外LED彩屏、讯息广告牌、交通屏
