Module Overview  

 This Audio Amplifier Module is based on PAM8403 which is a 3W, class-D audio amplifier. It offers low THD+N, allowing it to achieve high-quality sound reproduction. The new filterless architecture allows the device to drive the speaker directly, requiring no low-pass output filters, thus saving system cost and PCB area. With the same numbers of external components, the efficiency of the PAM8403 is much better than that of Class-AB cousins. It can extend the battery life, which makes it well-suited for portable applications.

Key Features: 

• Low THD+N.
• Thermal Shutdown.
• Superior Low Noise.
• Short Circuit Protection.
• High amplification efficiency 90%.
• Works with 2.5V-5v power supply.
• Output Power: 3 W + 3 W at 4 ohm.
• Good sound quality & noise suppression.
• Can use a computer USB power supply directly.
• Filterless, Low Quiescent Current, and Low EMI.
• Can directly drive 4 Ohm/8 Ohm small speakers.
• Dual-channel stereo output 3 w + 3 w power Class D.
• 3W Output at 10% THD with a 4Ω Load and 5V Power Supply.
• Small Size, 2.11 x 1.85 cm BOB can easily fit in a variety of products.

 

Safety Measures:  

NOTE: Violating these safety measures may lead to total product damage and such products are not eligible for refund or replacement.

• Input audio should be via shielded wire for the best performance.
• Use properly filtered and regulated power supply.
• Take care not to short speaker wires else IC will get damaged.
• Make sure the power supply never exceeds 5.5V else IC will get damaged.
• The module should be connected with the speaker before it’s powered on, otherwise, the module may damage easily.

Recommended Operating Conditions:  

Parameter	Rating	Unit
Supply Voltage Range	3.3 to 5.5	V
Operation Temperature Range	-40 to +85	°C