Topologie: Buck
Eingangsspannung (min.): 10.00 V
Eingangsspannung (max.): 26.00 V

Erstveröffentlichung am 12.06.2015, Version A vom


The IS31AP2111 is a digital I2S interface audio amplifier capable of driving a pair of 8Ω speakers at 20W when operating from a 24V supply. Due to itsClass-D output drive stage; it can operate without an external heat-sink or fan.The IS31AP2111 integrates advanced audio processing capabilities, such as volume control, 20 bands speaker EQ, audio mixing, 3D surround andDynamic Range Control (DRC). These functions are fully programmable via a simple I2C control interface.Robust protection circuits are provided to protect the IS31AP2111 from damage due to accidental or erroneous operating conditions. Because of its digital design, the IS31AP2111 is more tolerant to noise and PVT (Process, Voltage, and Temperature) variation than the analog Class-AB or Class-D audio amplifier counterpart. It has a robust anti-pop circuit for pop freeoperation during power ON. It integrates protection features for short circuit and over temperature. The IS31AP2111 is available in a thermally enhanced eTSSOP-24 package.


  • 16/18/20/24-bits input with I2S, Left-alignment and Right alignment data format
  • PSNR & DR (A-weighting)speaker: 99dB (PSNR), 104dB (DR) @24V
  • Multiple sampling frequencies (FS)
  • 32kHz / 44.1kHz / 48kHz and
  • 64kHz / 88.2kHz / 96kHz and
  • 128kHz / 176.4kHz / 192kHz
  • System clock = 64x, 128x, 192x, 256x, 384x,
  • 512x, 576x, 768x, 1024x Fs
  • 64x~1024x FS for 32kHz / 44.1kHz / 48kHz
  • 64x~512x FS for 64kHz / 88.2kHz / 96kHz
  • 64x~256x FS for 128kHz / 176.4kHz / 192kHz
  • Supply voltage 3.3V for digital circuit 10V~26V for speaker driver
  • speaker output power at 24V
  • 10W × 2CH into 8Ω @0.24% THD+N for stereo
  • 20W × 2CH into 8Ω @0.38% THD+N for stereo
  • Sound processing including:
  • 20 bands parametric speaker EQ
  • Volume control (+24dB ~
  • 103dB, 0.125dB/step),
  • Dynamic range control (DRC)
  • Dual band dynamic range control
  • Power clipping
  • 3D surround sound
  • Channel mixing
  • Noise gate with hysteresis window Bass/Treble tone control
  • DC-blocking high-pass filter
  • Anti-pop design
  • Short circuit and over-temperature protection
  • I2C control interface with selectable device address
  • Support hardware and software reset
  • Internal PLL
  • LV Under-voltage shutdown and HV Under-voltage detection
  • Power saving mode


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Version Verpackung VPE Muster
7447709220 PDF WE-PD SMT-Speicherdrossel 22 5.3 6.5 23 28 10 Standard
74477420 PDF WE-PD2 SMT-Speicherdrossel 100 0.57 0.68 0.51 0.65 7.5
450301014042 PDF WS-SLTV THT Mini Slide Switch, Opposite Side Connection 10x2.5 mm Lose 200