| 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 |
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
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.
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