LP5891_V01中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

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.