LP5891集成电路（IC）的LED驱动器规格书PDF中文资料

LP5891属于集成电路（IC）的LED驱动器。由德州仪器制造生产的LP5891LED 驱动器器件属于 LED 驱动器电源管理集成电路 (PMIC) 系列，可通过标称固定电压的电源为负载（通常为发光二极管）提供电流，并且电流可控。它与用于电压调节的类似产品的主要区别在于，这类器件提供较低的反馈电压（以提高系统能效），而且通常可对器件工作点进行外部控制，可在照明应用中用于实现调光功能。

1 Features

• AEC-Q100-qualified for automotive applications:

– Temperature grade 1: –40°C to +125°C, TA

• 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: 0.27 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

2 Applications

• Automotive interior light

• Automotive rear light

• Automotive local dimming backlight

3 Description

The LP5891-Q1 is a highly integrated, commoncathode

LED matrix driver with 48 constant current

sources and 16 scanning FETs. The LP5891-Q1

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.