Diodes Incorporated PAM8905 Class-D Audio Amplifier
Diodes Inc. PAM8905 Class-D Audio Amplifier is a high efficiency power amplifier with an integrated boost converter. It drives up to 1.9W (1% THD+N) into an 8Ω speaker. With 85% typical efficiency, the PAM8905 helps extend battery life when playing audio. The built-in boost converter generates the voltage rail for the output stage.
This provides louder audio than a stand-alone amplifier connected directly to a battery and maintains a consistent loudness, regardless of voltage. The PAM8905 has an AGC function that adjusts the Class-D gain to limit battery current at a lower voltage. Its outputs are protected against output-to-output shorts and features DC input protection. The PAM8905 is available in the tiny WCSP12 (1.5x2.0mm) package.
Features
- Built-in battery tracking automatic gain control (AGC)
- High efficiency integrated boost converter over 85%
- 1.9W into an 8Ω load from a 3.6V supply
- Operates from 2.8V to 5.2V
- Efficient class-D prolongs battery life
- Minimized ON/OFF pop noise
- Superior low noise
- High PSRR
- DC input protection
- Auto-recovery short-circuit protection
- Thermal shutdown
- Available in U-WLB1520-12 package
Applications
- Cell phones
- PDA
- GPS
- Portable electronics
- Speakers
Associated Product
Diodes Incorporated PAM8904/PAM8904Q Piezo Driver
Capable of driving a ceramic/piezo sounder with 18Vpp from a 3V power supply.
Additional Resources
Typical Application
Publié le: 2015-04-27
| Mis à jour le: 2022-03-11