IS31AP2121 Datasheet, PDF (1/37 Pages) Integrated Silicon Solution, Inc – 2X20W STEREO / 1X 40W MONO DIGITAL AUDIO AMPLIFIER

IS31AP2121
2X20W STEREO / 1X 40W MONO DIGITAL AUDIO AMPLIFIER
WITH 20 BANDS EQ FUNCTIONS, DRC AND 2.1CH MODE
Preliminary Information
October 2014
GENERAL DESCRIPTION
The IS31AP2121 is a digital audio amplifier capable of
driving 20W (BTL) each to a pair of 8Ω speakers and
40W (PBTL) to a 4Ω speaker operating at 24V supply
without external heat-sink or fan. The IS31AP2121 is
also capable of driving 4Ω, 10W (SE)x2 + 8Ω, 20W
(BTL)x1 at 24V supply for 2.1CH application.
The IS31AP2121 can provide advanced audio
processing functions, such as volume control, 20 EQ
bands, audio mixing, 3D surround sound and Dynamic
Range Control (DRC). These are fully programmable
via a simple I2C control interface. Robust protection
circuits are provided to protect the IS31AP2121 from
damage due to accidental erroneous operating
condition. The full digital circuit design of IS31AP2121
is more tolerant to noise and PVT (Process, Voltage,
and Temperature) variation than the analog Class-AB
or Class-D audio amplifier counterpart implemented by
analog circuit design. IS31AP2121 is pop free during
instantaneous power on/off or mute/shut down
switching because of its robust built-in anti-pop circuit.
APPLICATIONS
 TV audio
 Boom-box, CD and DVD receiver, docking system
 Powered speaker
 Wireless audio
FEATURES
 16/18/20/24-bits input with I2S, Left-alignment and
Right-alignment data format
 PSNR & DR (A-weighting)
Loudspeaker: 104dB (PSNR), 110dB (DR) @24V
 Multiple sampling frequencies (F_S)
- 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 F_S for 32kHz / 44.1kHz / 48kHz
- 64x~512x F_S for 64kHz / 88.2kHz / 96kHz
- 64x~256x F_S for 128kHz / 176.4kHz / 192kHz
 Supply voltage
- 3.3V for digital circuit
- 10V~26V for speaker driver
 Supports 2.0CH/2.1CH/Mono configuration
 Loudspeaker output power for at 24V
- 10W × 2CH into 8Ω @0.16% THD+N for stereo
- 15W × 2CH into 8Ω @0.19% THD+N for stereo
- 20W × 2CH into 8Ω @0.25% 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
- Bass management crossover filter
- DC-blocking high-pass filter
 Anti-pop design
 Short circuit and over-temperature protection
 Supports I2C control without MCLK
 I2C control interface with selectable device
address
 Support BCLK system
 Support hardware and software reset
 Internal PLL
 LV Under-voltage shutdown and HV Under-voltage
detection
 Power saving mode
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev. 0A, 10/17/2014