TI LP5890RRFR

As electronic devices become increasingly intelligent and require more LEDs for animation effects and indication functions, high-performance LED matrix drivers are needed to enhance user experience in compact form factors.

The LP5890 is a highly integrated common-cathode matrix LED display driver featuring 48 constant-current sources and 16 scan FETs. A single LP5890 can drive 16×16 RGB LED pixels, and two LP5890 devices stacked together can drive 32×32 RGB LED pixels. To achieve low power consumption, the device provides separate power supplies for red, green, and blue LEDs through its common-cathode architecture. In addition, with an ultra-low operating voltage range (Vcc as low as 2.5V) and ultra-low operating current (Icc as low as 3.9mA), the LP5890 significantly reduces operating power.

The LP5890 implements a high-speed transfer interface that supports long daisy-chain configurations with a high device count and high refresh rates, while minimizing EMI. The device supports SCLK up to 50MHz and GCLK (internal) up to 160MHz. The device also integrates enhanced circuitry and intelligent algorithms to address various display challenges in LED matrix applications — including top/bottom ghosting caused by LED open or short circuits, low-grayscale non-uniformity, coupling, and the Caterpillar issue — making the LP5890 an ideal choice for such applications.

The LP5890 also enables detection and elimination of LED open/weak-short/short-circuit conditions during operation, and can report this information to a companion digital processor.

• Discrete VCC and VR/G/B power supply support – VCC voltage range: 2.5V to 5.5V, VR/G/B voltage range: 2.5V to 5.5V
• 48 current source channels, range 0.2mA to 20mA
• Channel-to-channel accuracy: ±0.5% (typical), ±2% (maximum); device-to-device accuracy: ±0.5% (typical), ±2% (maximum)
• Low knee-point voltage: 0.26V (maximum) at lOUT = 5mA
• 3-bit (8-level) global brightness control
• 8-bit (256-level) color brightness control
• Up to 16-bit (65536-level) PWM grayscale control
• 16 scan line switches with 190mΩ RDS(ON)
• Ultra-low power consumption
• Standalone VCC as low as 2.5V
• Ultra-low lCC (as low as 3.9mA) with 50MHz GCLK
• Intelligent power-saving mode
• Built-in SRAM supporting 1 to 32 multiplexing
• Single device drives up to 16×48 LEDs or 16×16 RGB LEDs
• Two stacked devices drive up to 32×96 LEDs or 32×32 RGB LEDs
• High-speed, low-EMI Continuous Clock Serial Interface (CCSI)
• Three-wire only: SCLK/SIN/SOUT
• External 50MHz (maximum) SCLK
• Internal multiplier supporting GCLK range of 40MHz to 160MHz
• Optimized display performance
• Upper and lower ghosting elimination
• Low grayscale enhancement
• LED open, short, and weak short detection and elimination

• LED digital signage
• Keyboards, gaming accessories
• Large and smart home appliances
• Smart speakers, wired and wireless speakers
• Mixers, DJ equipment and broadcast access devices, switches and servers