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LP5866 6 × 18 LED Matrix Driver with 8-Bit Analog and 8-/16-Bit PWM Dimming

1 Features

•LED matrix topology:

–18 constant current sinks with 6 scan switches

for 108 LED dots

–Configurable for 1 to 6 scan switches

•Operating voltage range:

–V

CC

/V

LED

range: 2.7V to 5.5V

–Logic pins compatible with 1.8V, 3.3V, and 5V

•18 constant current sinks with high precision:

–0.1mA – 50mA per current sink when V

CC

≥

3.3V

–Device-to-device error: ±3% when channel

current = 50mA

–Channel-to-channel error: ±3% when channel

current = 50mA

–Phase-shift for balanced transient power

•Ultra-low power consumption:

–Shutdown mode: I

CC

≤ 1μA when EN = Low

–Standby mode: I

CC

≤ 10μA (15μA for

LP5866MDBT) when EN = High and CHIP_EN

= 0 (data retained)

–Active mode: I

CC

= 4.3mA (typ.) when channel

current = 5mA

•Flexible dimming options:

–Individual ON, OFF control for each LED dot

–Analog dimming (current gain control)

•Global 3-bit Maximum Current (MC) setting

for all LED dots

•3 groups of 7-bit Color Current (CC) setting

for red, green, and blue

•Individual 8-bit Dot Current (DC) setting for

each LED dot

–PWM dimming with audible-noise-free

frequency

•Global 8-bit PWM dimming for all LED dots

•3 programmable groups of 8-bit PWM

dimming for LED dot arbitrary mapping

•Individual 8-bit or 16-bit PWM dimming for

each LED dot

•Full addressable SRAM to minimize data traffic

•Individual LED dot open and short detection

•Deghosting and low brightness compensation

•Interface options:

–1MHz (max.) I

2

C interface when IFS = Low

–12MHz (max.) SPI interface when IFS = High

2 Applications

•LED animation and indication for:

–Keyboard, mouse, and gaming accessories

–Major and smart home appliances

–Smart speaker, wired and wireless speaker

–Audio mixer, DJ equipment, and broadcast

–Access equipment, switches, and servers

•Constant current sinks for optical module

3 Description

Electronic devices are becoming smarter, requiring

to use larger quantity of LEDs for animation and

indication purpose. A high-performance LED matrix

driver is required to improve user experience with

small solution size.

The LP586x devices are a family of high performance

LED matrix drivers. The device integrates 18 constant

current sinks with N (N = 1/2/4/6/8/11) switching

MOSFETs to support N × 18 LED dots or N × 6 RGB

LEDs. The LP5866 integrates 6 MOSFETs for up to

108 LED dots or 36 RGB LEDs.

The LP5866 supports both analog dimming and

PWM dimming methods. For analog dimming, each

LED dot can be adjusted with 256 steps. For PWM

dimming, the integrated 8-bit or 16-bit configurable

PWM generators enable smooth and audible-noise-

free dimming control. Each LED dot can also be

arbitrarily mapped into 8-bit group PWM to achieve

dimming control together.

The LP5866 device implements full addressable

SRAM to minimize the data traffic. The ghost-

cancellation circuitry is integrated to eliminate both

upside and downside ghosting. The LP5866 also

supports LED open and short detection functions.

Both 1MHz (maximum) I

2

C and 12MHz (maximum)

SPI are available in LP5866.

Device Information

PART NUMBERPACKAGE

(1)

BODY SIZE (NOM)

LP5866

VQFN (40)5.00mm × 5.00mm

TSSOP (38)9.70mm × 4.40mm

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

the end of the data sheet.

VIO_EN

SDA_MOSI

SCL_SCLK

SW0

SW1

CS17

MCU

VCC

GND

LP5860

ADDR1_MISO

SW2

VCAP

CS2

CS0

VSYNC

CS1

VLED

SW5

ADDR2_SS

IFS

V

LED

: 2.7 V to 5.5 V

V

CC

: 2.7 V to 5.5 V

C

VLED

1



F

V

IO

: 1.8 V to 5 V

AGND

Optional

C

VCC

1



F

R

Pullup

4.7 k



C

VIO

1 nF

C

VCAP

1 µF

Red LED

Green LED

Blue LED

Simplified Schematic

LP5866

SNVSC36A – DECEMBER 2021 – REVISED SEPTEMBER 2024

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.

Produktspecifikationer