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18 MULTI-FUNCTION LED DRIVER WITH I2C INTERFACE
Features
⚫ 18-channel RGB LED Driver
➢ Global 256-levels DC current configuration
➢ Individual 4096-levels PWM for dimming
➢ Individual 256-levels current for color-
mixing
➢ Dither function
⚫ High-precision current sinks
➢ Device-to-device error: ±5%
➢ Channel-to-channel error: ±5%
⚫ EMI and audible noise reduction
➢ Phase delay and phase inverting scheme
➢ Slew rate control function
⚫ Flexible LED lighting pattern control
⚫ LED open/short detection per channel
⚫ Auto power save mode when all LEDs off >
32ms
⚫ Under voltage lock out and over temperature
protection
⚫ 1MHz I
2
C interface, 4 selectable addresses:
20h, 21h, 24h, 25h
⚫ Power supply: 2.7V~5.5V
⚫ QFN 4mmX4mmX0.85mm-32L package
Applications
Cell Phone
Keyboard
PDA/MP3/MP4/CD/Mini display
Smart home appliance
General Description
AW21018 is an 18-channel multi-function LED
driver. Each channel has individual 8-bit DC current
setting for color-mixing and maximum 12-bit PWM
resolution for brightness control. The global current
of each channel is recommended to be 40mA
configured via register and external resistor R
EXT
.
Group control mode, autonomous breathing pattern
and rapid RGB control mode are provided for
flexible, high efficiency lighting effect programming
and fast display updating.
Programmable phase-shifting and spread spectrum
technology are utilized to reduce EMI and audible
noise caused by MLCC when LEDs turn on or off
simultaneously.
AW21018 can be turned off with minimum current
consumption by pulling the EN pin low.
AW21018 is available in QFN 4mmX4mmX
0.85mm-32L package. It operates from 2.7V to 5.5V
over the temperature range of -40°C to +85°C.
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