PAM8823 Digital Audio Amplifier

The PAM8823 from Diodes Incorporated is a highly efficient, 25 W stereo / 50 W mono Class D digital audio amplifier with I²S input to drive stereo bridge-tied speakers. The device does not require an external heat-sink or fan while playing music at these power levels. The PAM8823 has embedded Audio DSP to support advanced features – such as volume control, 30-band EQs, audio mixing, 3D surround sound and Dynamic Range Control (DRC), and provides a high-quality audio output with flexible digital audio processing capability. These features are fully programmable via a simple I²C control interface, with robust protection circuits to protect the PAM8823 from damage by accidental erroneous operating condition. This audio amplifier is available in a 48-LQFP-EP (7 mm x 7 mm) package.

Features

• Digital audio processor features include:
  • 30 bands configurable parametric speaker EQ
  • Volume control (+24 dB to -103 dB, 0.125 dB/step)
  • Dynamic range control with power clipping
  • Three-band configuration plus post dynamic range control
  • Programmed 3D surround sound and channel mixing
  • Noise reduction control and bass/treble tone control
  • Level meter and power meter support
  • I²S SDATAO outputs selectable for audio monitoring, subchannel, or echo cancellation (only by TSSOP-24EP (TypeA1))
  • Short-circuit/overtemperature/overvoltage protection
  • Serial control interface with selectable device address
  • LV undervoltage shutdown and HV undervoltage detection
  • Flexible power saving mode with internal PLL design
• Wide 4.5 V to 26 V for loudspeaker drive, 3.3 V for digital circuit
• Loudspeaker output power at 12 V for stereo
  • 7 W x 2CH into 8 Ω <1% THD+N
  • 10 W x 2CH into 4 Ω <1% THD+N
• Loudspeaker output power at 18 V for stereo
  • 15 W x 2CH into 8 Ω <1% THD+N
• Loudspeaker output power at 24 V for stereo
  • 25 W x 2CH into 8 Ω <1% THD+N
• Loudspeaker PSNR 108 dB, DR 108 dB at 24 V
• 16-bit/18-bit/20-bit/24-bit input with I²S, left-alignment and right-alignment data format support
• Multiple sampling frequencies (fS) including 8 kHz, 32 kHz, 44.1 kHz, 48 kHz, 64 kHz, 88.2 kHz, 96 kHz, 128 kHz, 176.4 kHz, and 192 kHz
• Support stereo two channels or mono by PBTL configuration
• Lead-free and RoHS compliant
• Halogen and Antimony free
• Available in a 48-LQFP-EP (7 mm x 7 mm) package