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AW85281FCR

23V Digital Input, High Efficiency Class-D Audio Amplifier with PSM

Datasheet :
Preview - AW85281FCR - Datasheet

Product details

Parameters

Control Interface IIC
Temperature -40℃~105℃
DSP NO
Noise (μV) 28
PO(W)（8&THD=1%） 15
PO(W)（4&THD=1%） 30
IO Supply (Max) (V) 3.63
IO Supply (Min) (V) 1.62
Digital Supply (Max) (V) 1.98
Digital Supply (Min) (V) 1.62
Power Supply (Max) (V) 23
Power Supply (Min) (V) 2.7
IV Sense YES
Loadmin（Ω) 3.2
Channel 1

Package | Pins | Size

FCQFN 4X3.5-30L

Features

Key Features 23V supply for Class-D Output Stage PSM Multi-Level Supply Architecture PTC External Boost Control Algorithm Ultrasonic Output Support up to 40kHz Output Power 30W@4Ω, 18V, THD+N<1% High-efficiency Class-D Amplifier PSM ON 81% at 0.5W,4Ω, PVDDH=18V, PVDDL=5V 84% at 1W,4Ω, PVDDH=18V, PVDDL=5V High-efficiency Class-D Amplifier PSM OFF 80% at 1W, 4Ω, PVDDH=18V, PVDDL=5V 89% at 10W, 4Ω, PVDDH=18V, PVDDL=5V 90% at 20W, 4Ω, PVDDH=18V, PVDDL=5V Interface and Control I2S/TDM:8 Channels of 32 bits up to 96ksps Data Width: 16, 20, 24, 32 bits 32kHz to 192kHz Sample Rates Protection and EMI: IV-Sense for Speaker Protection Over Power and Low Battery Protection PVDDH/PVDDL Supply Tracking Limiters Thermal and Over Current Protections Thermal Foldback Power Supplies PVDDH: 3V~23V PVDDL: 2.7V~5.5V AVDD: 1.8V IOVDD: 1.8V/3.3V Integrated Self-Protection Over-Current Protection (OCP) Over-Temperature Protection (OTP) Over / Under-Voltage Lock-out (OVLO/UVLO) Cycle by Cycle (CBC) DC-detect and short-circuit protection FCQFN 3.5mmX4mm-30L Package

Description

The AW85281 is a mono, digital input Class-D audio amplifier optimized for efficiently driving high peak power into loudspeakers. The Class-D amplifier is capable of delivering 30W of continuous power into a 4Ω load with less than 1% THD+N at a supply voltage of 18V. The broad voltage input range and the high output power makes this amplifier versatile enough to work with battery or line powered systems. The integrated speaker voltage and current sense provides for real-time monitoring of loudspeakers. PSM power architecture improves amplifier efficiency by internally selection the supplies for optimal headroom. Brownout prevention scheme with adjustable threshold allows reducing the gain in signal path when the supply drops. The PTC algorithm allows user to optimize efficiency and improve battery life by controlling the external power supply. Up to eight AW85281 devices can share a common bus via I2S/TDM and I2C interfaces. AW85281 is available in a 30 pin FCQFN 3.5mmX4mm-30L Package for a compact PCB footprint.

Technical documentation
Type
Title
Language
Date
Datasheet DS_AW85281_EN_V1.0 英文   2025-10-14
Product Design Guide AW85281 Software Design Guide 英文   2026-05-19

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

Evaluation board

AW85270FCR_EVB_V1.0 — AW85270FCR EVB is the digital power amplifier EVB board, cooperating with USB_To_IIS board and the Awinic’s software, digital power amplifier demonstration can be achieved.

EVB evaluation board for AW85270FCR/AW85280FCR/AW85281FCR

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Software development

APPLICATION SOFTWARE&FRAMEWORK

AW85281_GUI — AW85281FCR product tuning GUI plugin

AW85281FCR product tuning GUI plugin. Requires AwinicSCPV4 installed.

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APPLICATION SOFTWARE&FRAMEWORK

AwinicSCPV4_GUI — AwinicSCPV4 Intelligent Tuning Tool

AwinicSCPV4 is an intelligent tuning tool specifically designed for Awinic products, facilitating product configuration and debugging processes. Intuitive interface and user-friendly operation can help customers shorten development time and complete system integration quickly.

View options
Hardware development

Evaluation board

AW85270FCR_EVB_V1.0 — AW85270FCR EVB is the digital power amplifier EVB board, cooperating with USB_To_IIS board and the Awinic’s software, digital power amplifier demonstration can be achieved.

EVB evaluation board for AW85270FCR/AW85280FCR/AW85281FCR

View options
Software development

APPLICATION SOFTWARE&FRAMEWORK

AW85281_GUI — AW85281FCR product tuning GUI plugin

AW85281FCR product tuning GUI plugin. Requires AwinicSCPV4 installed.

View options

APPLICATION SOFTWARE&FRAMEWORK

AwinicSCPV4_GUI — AwinicSCPV4 Intelligent Tuning Tool

AwinicSCPV4 is an intelligent tuning tool specifically designed for Awinic products, facilitating product configuration and debugging processes. Intuitive interface and user-friendly operation can help customers shorten development time and complete system integration quickly.

View options