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发布者:来自网络 发布时间:2014-5-23 阅读:2237次    关键字: 音频功放
AD82586B-2x20W Stereo/1x 40W Mono Audio Amplifier


AD82586B-2x20W Stereo/1x 40W Mono Digital Audio Amplifier With 20 Bands EQ Functions and PWM out DataSheet

Description
    AD82586B is a digital audio amplifier capable of driving a pair of 8Ω, 20W or a single 4Ω, 40W operating at 24V supply without external heat-sink or fan requirement. Higher output wattage can be delivered with cooling method.
    AD82586B can provide advanced audio processing capabilities, such as volume control, 20 bands speaker EQ, audio mixing, 3D surround and Dynamic Range Control (DRC). These functions are fully programmable via a simple I2C control interface. Robust protection circuits are provided to protect
    AD82586B from damage due to accidental erroneous operating condition. AD82586B 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. AD82586B is pop free during instantaneous
power switch because of its built-in, robust anti-pop circuit.
    The output stage is flexibly configurable for stereo or mono applications. In addition, AD82586B provides a sub-woofer PWM output port for the increasingly
popular 2.1 channel applications. The programmable audio bass content of this subwoofer PWM output port can drive an external, low cost digital amplifier power
stage, e.g., ESMT’s AD92580. Furthermore, use three pieces of AD82586B can realize 5.1 channels for home theater applications.

Features
 16/18/20/24-bit input with I2S, Left-alignment
and Right-alignment data format
 PSNR & DR(A-weighting)
Loudspeaker: 94dB (PSNR), 106dB (DR) @24V
 Multiple sampling frequencies (Fs)
32kHz / 44.1kHz / 48kHz and
64kHz / 88.2kHz / 96kHz and
128kHz/176.4kHz/192kHz
 System clock = 64x, 128x, 256x, 384x, 512x, 768x,
1024x Fs
256x~1024x Fs for 32kHz / 44.1kHz / 48kHz
128x~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 loudspeaker driver
 Loudspeaker output power for 24V
10W x 2CH into 8Ω @0.16% THD+N for stereo
15W x 2CH into 8Ω @0.18% THD+N for stereo
20W x 2CH into 8Ω @0.24% THD+N for stereo
 Sounds processing including:
Volume control (+24dB~-103dB, 0.125dB/step)
Dynamic range control
Power clipping
Channel mixing
User programmed noise gate with hysteresis window
DC-blocking high-pass filter  Anti-pop design
 Short circuit and over-temperature protection
 I2C control interface
 Internal PLL
 LV Under-voltage shutdown and HV Under-voltage detection
 Power saving mode
 Dynamic temperature control

Applications
 TV audio
 Boom-box, CD and DVD receiver, docking system
 Powered speaker
 Wireless audio

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