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Texas Instruments LP5891/LP5891-Q1 48×16 LED Matrix Driver

Texas Instruments LP5891/LP5891-Q1 48×16 LED Matrix Driver is a highly integrated, common-cathode LED matrix driver with 48 constant current sources and 16 scanning FETs. The device implements a high-speed rising-edge transmission interface to support a high device count daisy-chained while minimizing electrical-magnetic interference (EMI) and internal GCLK rate ranges from 40MHz to 160MHz. The  LP5891/LP5891-Q1 implements LED open/weak-short/short detections and removals during operations. The Texas Instruments LP5891-Q1 devices are AEC-Q100 qualified for automotive applications.

Features

  • Separated VCC and VR/G/B power supply
    • 2.5V to 5.5V VCC voltage range
    • 2.5V to 5.5V VR/G/B voltage range
  • 48 current source channels from 0.2mA to 20mA
    • Channel-to-channel accuracy: ±0.5% (typ.), ±2% (max.); device-to-device accuracy: ±0.5% (typ.), ±2% (max.)
    • Low knee voltage (0.26V (max.) when IOUT = 5mA)
    • 3-bits (8 steps) global brightness control
    • 8-bits (256 steps) color brightness control
    • Maximum 16-bits (65536 steps) PWM grayscale control
  • 16 scan line switches with 190mΩ RDS(ON)
  • Ultra-low power consumption
    • Independent VCC down to 2.5V
    • Lowest ICC down to 3.6mA with 50MHz GCLK
    • Intelligent power saving mode with ICC down to 0.9mA
  • Built-in SRAM to support 1–64 multiplexing
    • Single device to support 48 × 16 LEDs or 16 × 16 RGB pixels
    • Dual devices stackable to support 96 × 32 LEDs or 32 × 32 RGB pixels
    • Three devices stackable to support 144 × 48 LEDs or 48 × 48 RGB pixels
    • Four devices stackable to support 192 × 64 LEDs or 64 × 64 RGB pixels
  • High speed and low EMI Continuous Clock Series Interface (CCSI)
    • Only three wires: SCLK / SIN / SOUT
    • External 50MHz (max.) SCLK with a rising-edge transmission mechanism
    • Internal frequency multiplier to support high-frequency GCLK
  • Optimized performances for LED matrix displays
    • Upside and downside ghosting removal
    • Low grayscale enhancement
    • LED open, weak-short, short detection and removal
  • LP5891MRRFR supports –55°C to approximately 125°C operating ambient temperature

Applications

  • Mini- / micro-LED matrix products
  • Gaming keyboard RGB LED backlighting
  • Audio mixer, DJ equipment, and broadcast
  • LED luminous panel and Local dimming backlight

Functional Block Diagram

Block Diagram - Texas Instruments LP5891/LP5891-Q1 48x16 LED Matrix Driver

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Texas Instruments LP5891/LP5891-Q1 48×16 LED Matrix Driver