With continuous iteration and upgrading of consumer electronics and the sustained explosion of AIoT smart interaction scenarios, delicate and vivid ambient lighting effects have become a core configuration for enhancing product aesthetics, strengthening human-machine interaction, and defining brand identity. Addressing the industry’s critical demands forAIoTslimness, high integration, low EMI, and low power consumption,awinic officially launches theEMIultra-compact package18-channel intelligent breathing LED driver IC AW21018PLR.18AW21018PLRA single chip can drive up to 18 monochrome LEDs or 6 RGB LED groups, supporting applications including smartphone interactive indicators, tablet side ambient lighting, notebook logo indicators, AI-powered smart toys, and the full spectrum of AIoT smart devices—delivering an integrated lighting-effect solution characterized by
ultra-compact packaging, ultimate dimming precision, biomimetic autonomous breathing, and low-EMI silent operation—ensuring compact efficiency, minimalist design, and high reliability.18LED6RGBLogoAIAIoTEMI&
1.Full-color RGBRGBconstant-current configuration with1680 16.8-million-color fine-tuning
AW21018 Equipped with a high-precision constant-current source offering ±5% current accuracy, ensuring exceptional consistency in brightness and color across multiple LEDs.±5%
• 256256-level global dimming:Supports one-touch system-wide brightness adaptation, enabling rapid switching between daylight-high-brightness and night-eye-protection-low-brightness modes to meet diverse lighting-scenario requirements;
• 256256-level independent DC constant-current dimming:DCEach channel features precise, independent current control, guaranteeing consistent LED brightness and chromaticity—effortlessly achieving 16.8-million-color full-color mixing for exquisite full-color applications;LEDLED 1680
• 40964096-level independent PWM fine dimming:PWM12-bit ultra-high-resolution PWM dimming ensures silky-smooth brightness transitions and richly layered light effects—effectively minimizing stair-stepping artifacts while balancing visual sophistication and user comfort.12bitPWM

Figure1 AW21018 Typical Application Diagram
2.Ultra-compact package size reduces PCB footprint by 75% 75%
AW21018PLR Features an 2mm × 2mm (25-Ball) ultra-miniaturized 2 mm × 2 mm (25-ball) package, custom-engineered for space-constrained applications such as smartphones, tablets, and AI-powered toys.AI
Compared to industry-standard 18-channel LED drivers (typically using QFN 4×4 packages), AW21018PLR reduces PCB footprint by up to 75%, freeing up valuable board space and significantly simplifying layout and routing complexity. 18 LED Driver QFN 4×4 AW21018PLR 75%
3.Built-in autonomous breathing engine efficiently offloads MCU resources
The chip integrates a dedicated autonomous breathing engine—enabling smooth, subtle fade-in/fade-out lighting effects without real-time intervention from the host MCU. MCU
• Cost & resource optimization: Substantially saves MCU program memory and timer resources, lowering software driver development costs; MCU
• Ultra-low power consumption: Hardware-level autonomous operation effectively reduces overall system power draw, extending battery life for AIoT and wearable devices. AIoT
Figure2 AW21018Built-in Autonomous Breathing Lighting Engine
4.Low-EMI silent design simplifies system implementationEMI & To resolve common pain points—EMI interference and capacitor squeal—in LED driving applications, AW21018PLR implements deep optimizations:
LED LED EMI AW21018PLR
• Low-EMI design: Supports slew-rate control and spread-spectrum functionality to effectively suppress electromagnetic interference—facilitating seamless EMC certification compliance; EMI Slew Rate EMC
• Squeal-free suppression: PWM driving frequency reaches up to 62 kHz—well beyond the audible human hearing range (20 Hz–20 kHz)—completely eliminating ceramic capacitor squeal, elevating overall product quality and reducing system design cost.PWM 62 kHz20Hz-20kHz
• 1818-channel high-precision constant-current source driving
256256-level global current control
256256-level independent DC constant-current dimmingDC
40964096-level independent PWM dimmingPWM
Max. 40 mA per channelLED40mA
• Built-in autonomous breathing engine—no real-time MCU intervention required
• Low-EMI silent designEMI &
• Supports open/short-circuit fault diagnostics
• 1MHz 1 MHz high-speed I²C interfaceI2C Ultra-compact package: FOPLP 2 mm × 2 mm – 25-ball
• Conventional package: QFN 2 mm × 2 mm – 24-leadFOPLP 2mm×2mm-25B
• awinic Light Language Selection Guide QFN 2mm×2mm-24L
Constant-current direct drive (6–36 channels)
LED6~36

LEDConstant-current matrix drive (18–216 channels)18~216
