Texas Instruments LP5891 Handleiding

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LP5891 48 Current Sources, 64 Scans, Common Cathode LED Matrix Driver

1 Features

•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: 0.26 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

•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.

Device Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

LP5891

VQFN(76)9 mm × 9 mm

BGA(96)6 mm × 6 mm

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

the end of the data sheet.

LP5891 with Four Devices Stackable Connection

LP5891

SLDS269A – MARCH 2022 – REVISED MAY 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.

Product specificaties