MBI5353Q ∣車用LED 驅動晶片 ∣ 車用照明 ∣聚積科技



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

MBI5353Q 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. MBI5353Q 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, MBI5353Q 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.

MBI5353Q drives the corresponding LEDs to the brightness specified by image data. With MBI5353Q, 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, MBI5353Q detects individual LED for open-circuit errors without extra components. MBI5353Q 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.

MBI5353Q 產品規格

  • Items
  • 01
    No. of Output Channel
  • 02
    Output Current per Channel
  • 03
    Sustaining Output Voltage
  • 04
    Excellent Output Current Accuracy-between channels
    <±3.5% (max.)
  • 05
    Excellent Output Current Accuracy-between ICs
    <±7.0% (max.)
  • 06
  • 07
    Scan Design
    Up to 32-scan
  • 08
    Error Detection - LED Open
  • 09
    Error Detection - LED Short
  • 10
    Current Gain
  • 11
    Dimming Method
    13/14/15/16-bit PWM
  • 12
  • 13
    RoHS Compliant Package
    QFN-56 8X8
  • 14
    Major Applications
    Full-width Rear Light, Ambient Light