MBI5353 ∣ FALD LED Backlight Driver IC ∣ Passive Matrix ∣ Automotive Display ∣Macroblock



48-Channel PWM Constant Current LED Driver for 1:32 Time-Multiplexing Applications

MBI5353 is designed for automotive-grade dynamic LED graphic applications using internal Pulse Width Modulation (PWM) control with selectable 16/ 15/ 14 / 13-bit color depth. MBI5353 features a 48-bit shift register that converts serial input data into each pixel’s grayscale 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 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, 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 the 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 LEDs for open-circuit errors without extra components. MBI5353 equips an innovative cross-elimination function, solving the cross phenomenon induced by failure LEDs. Besides, integrated ghost elimination circuit eases the ghost problems. To further reduce the power consumption of the LED display, a built-in smart power saving mode will shut the driver IC down when grayscale data is zero.

MBI5353 Specification

  • Items
  • 01
    No. of Output Channel
  • 02
    Output Current per Channel
  • 03
    Sustaining Output Voltage
  • 04
    Excellent Output Current Accuracy-between channels
    <±1.5% (typ.)
  • 05
    Excellent Output Current Accuracy-between ICs
    <±1.5% (typ.)
  • 06
  • 07
    Transmission Interface
    SPI like
  • 08
    Transmission Method
    No Burst Mode
  • 09
    Scan Design
    Up to 32-scan
  • 10
    Error Detection - LED Open
  • 11
    Error Detection - LED Short
  • 12
    Thermal Protection
  • 13
    Current Gain
  • 14
    Dimming Method
    13/14/15/16-bit PWM
  • 15
  • 16
    Feedback Control
  • 17
  • 18
    RoHS Compliant Package
  • 19
    Major Applications
    Monitor, Automotive