1 Features
• Separated VCC and VR/G/B power supply
– VCC voltage range: 2.5 V–5.5 V
– VR/G/B voltage range: 2.5 V–5.5 V
• 48 current source channels from 0.2 mA to 20 mA
– Channel-to-channel accuracy: ±0.5% (typ.),
±2% (max.); device-to-device accuracy: ±0.5%
(typ.), ±2% (max.)
– Low knee voltage: 0.26 V (max.) when IOUT = 5
mA
– 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 190-mΩ RDS(ON)
• Ultra-low power consumption
– Independent VCC down to 2.5 V
– Lowest ICC down to 3.6 mA with 50-MHz GCLK
– Intelligent power saving mode with ICC down to
0.9 mA
• 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 50-MHz (max.) SCLK with 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
2 Applications
• Mini- / micro-LED matrix products
• Gaming keyboard RGB LED backlighting
• Audio mixer, DJ equipment, and broadcast
• LED luminous panel and Local dimming backlight
3 Description
The LP5891 is a highly integrated, common-cathode
LED matrix driver with 48 constant current sources
and 16 scanning FETs. The LP5891 implements
a high speed rising-edge transmission interface
to support high device count daisy-chained while
minimizing electrical-magnetic interference (EMI) and
internal GCLK rate ranges from 40 MHz to 160 MHz.
The device also implements LED open/weak-short/
short detections and removals during operations.