IS31AP2121 225W STEREO / 1 50W MONO DIGITAL AUDIO AMPLIFIER WITH 20 BANDS EQ FUNCTIONS, DRC AND 2.1CH MODE August 2021 GENERAL DESCRIPTION FEATURES The IS31AP2121 is a digital audio amplifier capable of 16/18/20/24-bits input with I2S, Left-alignment and driving 25W (BTL) each to a pair of 8 speakers and Right-alignment data format 50W (PBTL) to a 4 speaker operating at 24V supply PSNR & DR (A-weighting) without external heat-sink or fan. The IS31AP2121 is Loudspeaker: 104dB (PSNR), 110dB (DR) 24V also capable of driving 4, 12W (SE)2 + 8, 25W Multiple sampling frequencies (FS) (BTL)1 at 24V supply for 2.1CH application. - 32kHz / 44.1kHz / 48kHz and The IS31AP2121 can provide advanced audio - 64kHz / 88.2kHz / 96kHz and processing functions, such as volume control, 20 EQ - 128kHz / 176.4kHz / 192kHz bands, audio mixing, 3D surround sound and Dynamic System clock = 64x, 128x, 192x, 256x, 384x, Range Control (DRC). These are fully programmable 512x, 576x, 768x, 1024x Fs via a simple I2C control interface. Robust protection - 64x~1024x FS for 32kHz / 44.1kHz / 48kHz circuits are provided to protect the IS31AP2121 from - 64x~512x FS for 64kHz / 88.2kHz / 96kHz damage due to accidental erroneous operating - 64x~256x FS for 128kHz / 176.4kHz / 192kHz condition. The full digital circuit design of IS31AP2121 is more tolerant to noise and PVT (Process, Voltage, Supply voltage and Temperature) variation than the analog Class-AB - 3.3V for digital circuit or Class-D audio amplifier counterpart implemented by - 10V~26V for speaker driver analog circuit design. IS31AP2121 is pop free during Supports 2.0CH/2.1CH/Mono configuration instantaneous power on/off or mute/shut down Loudspeaker output power for at 24V switching because of its robust built-in anti-pop circuit. - 10W 2CH into 8 0.16% THD+N for stereo - 15W 2CH into 8 0.19% THD+N for stereo - 25W 2CH into 8 0.3% THD+N for stereo APPLICATIONS Sound processing including: TV audio - 20 bands parametric speaker EQ Boom-box, CD and DVD receiver, docking system - Volume control (+24dB ~ -103dB, 0.125dB/step), Powered speaker - Dynamic range control (DRC) Wireless audio - 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 Lumissil Microsystems www.lumissil.com 1 Rev. D, 08/10/2021 IS31AP2121 TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit (For Stereo) Figure 2 Typical Application Circuit (For Mono) Pin Logic 0 1 PDB Power Down Normal RSTB Reset Normal PBTL Stereo Mono Lumissil Microsystems www.lumissil.com 2 Rev. D, 08/10/2021