MBI5253.pdf

Macroblock, Inc. 2018

Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30072, ROC.

TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: info@mblock.com.tw

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Features

 3V-5.5V supply voltage

Between ICs: <±3％(Max.)

 Digital Power-On-Reset

 Built-in 16K-bit SRAM to support time-multiplexing for 1 ~ 32 scans

 14-bit /13-bit color depth PWM control to improve visual refresh rate

 6-bit current gain，12.5%~100%

 LED failure isolation

-LED failure induced cross elimination

 Compulsory LED open detection

 Integrating ghost elimination circuit

 Improvement of high contrast interference

MBI5253 is designed for LED video applications using internal Pulse Width Modulation (PWM) control with

selectable 14-bit / 13-bit color depth. MBI5253 features a 16-bit shift register which converts serial input data into

constant current sinks for driving LEDs with a wide range of V

F

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, MBI5253 enhances PWM by scrambling the “on” time of each scan line into several “on” periods and

Through compulsory error detection, MBI5253 detects individual LED for open-circuit errors without extra

components. MBI5253 equipped an innovative cross elimination function, and it solves the cross phenomenon

Block Diagram