| Global Current Level |
256 |
| Current Levels for Color-Mixing |
256 |
| Channel |
198 |
| Current Levels for Dimming |
256 |
| Charging Indicator |
NO |
| Control Interface |
SPI |
| Power Supply (Max) (V) |
5.5 |
| Global Max Current(mA) |
120 |
| IO Level (V) |
1.8 |
| Audio Sync. |
NO |
| Power Supply (Min) (V) |
2.7 |
| Auto Breath |
YES |
| Temperature |
-40℃~85℃ |
| Topology |
Matrix |
| Package (mm) |
QFN 5X5-40L |
•18 current sinks, 11 current switches, up to drive 198 LEDs or 66 RGBs.
•Programmable matrix size
•3 pattern controllers for auto breathing or group PWM control
•Global 256-level DC current configuration
•Individual 256-level PWM for dimming
•Individual 256-level scaling current for color-mixing
•High-precision current sinks
■Device-to-device error: ±5%
■Channel-to-channel error: ±5%
•EMI and audible noise reduction
■Phase control
■Spread spectrum function
■Programmable slew rate control
•Individual 198 LEDs open/short detection
•Multiple-device clock synchronization by SYNC pin
•UVLO and over-temperature protection
•De-Ghost
•10MHz SPI interface
•Power supply: 2.7V~5.5V
•QFN 5mmx5mmx0.55mm-40L package
AW20198S is an 18x11 matrix LED driver programmed via an SPI compatible interface. Each channel has individual 8-bit DC current setting for color-mixing and 8-bit PWM current setting for brightness control. The global current of each channel is configured via register GCCR and external resistor REXT.
Three integrated pattern controllers provide auto breathing in group dimming control. Each pattern controller can work in auto breathing in manual control mode. All breathing parameters are configurable, including rising/falling slope, on/off time, repeat times, and minimum/maximum brightness, etc. Each LED’s PWM parameter can be sourced from any one of the 3 pattern controllers optionally.
Phase-delay, phase-inverting, selectable three phase, spread spectrum and slew rate control technology are utilized to reduce EMI and audible noise caused by MLCC when LEDs turn on in off simultaneously.
AW20198S can be turned off with minimum current consumption by either pulling the EN pin low in using the software reset.
AW20198S is available in QFN 5mmx5mmx 0.55mm-40L package. It operates from 2.7V to 5.5V over the temperature range of -40°C to +85°C.
