Texas Instruments LP5891-Q1 Bedienungsanleitung

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LP5891-Q1 Automotive 48 Current Sources, 64 Scans, Common Cathode LED Matrix

Driver

1 Features

•AEC-Q100-qualified for automotive applications:

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

A

•Separated V

CC

and V

R/G/B

power supply

–V

CC

voltage range: 2.5 V – 5.5 V

–V

R/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 I

OUT

= 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 R

DS(ON)

•Ultra-low power consumption

–Independent V

CC

down to 2.5 V

–Lowest I

CC

down to 3.6 mA with 50-MHz GCLK

–Intelligent power saving mode with I

CC

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, common-

cathode 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.

Package Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

LP5891-Q1VQFN (76)9.00 mm × 9.00 mm

(1)For all available packages, see the orderable addendum at

the end of the data sheet.

OUTR0

LP5891-Q1

LINE15

VLEDG

LINE0

OUTB15

OUTG0

OUTB0

OUTG15

OUTR15

OUTR0

SIN

SCLK

VCC

SOUT

GND

OUTB15

OUTG0

OUTB0

OUTG15

OUTR15

LINE15

LINE0

SIN

SCLK

IREF

VCC

SOUT

GND

IREF

µC

SOUT

SCLK

SIN

VLEDR

VCC

64 Lines

VLEDR

VLEDG/B

...

LP5891-Q1

64 RGBs

VLEDB

VLEDG

VLEDR

VLEDB

...

OUTR0

SIN

SCLK

VCC

SOUT

GND

OUTB15

OUTG0

OUTB0

OUTG15

OUTR15

LINE15

LINE0

IREF

...

LP5891-Q1

VLEDG

VLEDR

VLEDB

...

OUTR0

SIN

SCLK

VCC

SOUT

GND

OUTB15

OUTG0

OUTB0

OUTG15

OUTR15

LINE15

LINE0

IREF

...

LP5891-Q1

VLEDG

VLEDR

VLEDB

...

......

Red LEDGreen LEDBlue LED

LP5891-Q1 with Four Devices Stackable Connection

LP5891-Q1

SNVSC61A – AUGUST 2022 – REVISED DECEMBER 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Produktspezifikationen