2.8W Class D Stereo Speaker Amplifier

MFG Part #:


Part #:
Lead Time 52 weeks
Unit Price:$0.39
Minumum Qty: 1
Ask a Question
Call Me
Email This Page

Product Information

Back to top
The ALC105 is a stereo Class-D audio amplifier with a typical 4? speaker impedance, a 5V power supply, and maximum output power of 3W per channel. The ALC105 provides configurable input to output gain ratio, with no external components required.

For input signals, the system designer can easily choose 11dB, 14dB, 19dB, or 25dB boost gain by pulling high/low two control pins. With Class-D amplifier technology, the ALC105 offers good audio quality, high power-efficiency, and requires fewer external components. With analog input support, the ALC105 can also be used as a Class-AB amplifier.

The ALC105 can output power directly to the speaker, with less power dissipation inside the silicon. This high efficiency with less run-time power consumption can greatly extend the battery life of portable consumer electronic devices and notebook PCs.


• Notebook PCs
• Portable Navigation Device
• Feature Phone, PDA phone, and Multimedia phone
• Digital Photo Frame

Symmetry Electronics (and its e-commerce division: SemiconductorStore.com) is an authorized Realtek distributor.


Back to top
Single-Ended stereo analog input
BTL (Bridge-Tied Load) output power: Po= 3W at 4? load and 5V power with 10% THD+N ratio
No external output L-C filter required ?
Supports pop noise suppression ?
Configurable input to output boost gain ratio (+11dB/+14dB/+19dB/+25dB) ?
Speaker amplifier power supplies from 3V to 5.25V ?
10A Shut Down current ?
DFN-12 package

Previously Viewed Products