Original ACM8629 with built-in DSP, 50W stereo/100W mono I2S digital input D-class audio amplifier IC TSSOP-28

Product Descriptions

ACM8629 is a highly integrated and efficient dual channel digital input amplifier. The power supply voltage range is 4.5V-26.4V, and the digital interface power supply supports 3.3V. Under a load of 4 ohms, the output power can reach 2 in BTL mode × 50w@1 percent THD+N, under a 2 ohm load, a single channel can output 1 in PBTL mode × 100W @ 1 percent THD+N.

ACM8629 adopts a new PWM pulse width modulation architecture, which dynamically adjusts the pulse width according to the signal size. While ensuring audio performance, it reduces static power consumption, improves efficiency, and prevents the generation of POP sounds. The application of spread spectrum technology can significantly reduce EMI radiation. Within a certain range of power and horn line length, magnetic beads can be used instead of inductance schemes to optimize cost and circuit area.

ACM8629 highly integrates multiple sound effect algorithms. Internal modules can be independently controlled, and left and right channels can also be independently controlled. Internally integrated with digital and analog gain adjustment, signal mixing module, 15 EQs and 5 post EQs, programmable specific frequency band signal dynamic enhancement, 3-band advanced energy prediction DRC and other independent modules, can achieve various sound effects. For example, low signal bass enhancement, high and low frequency compensation, and other functions can be achieved through these modules.

Product Features

• Flexible voltage configuration

-PVDD: 4.5V to 26.4V

-DVDD and I/O: 3.3V

• Output power

-2 × 50W, stereo mode (4 Ω, 24V, THD+N=1 percent)

-1 × 100W, mono mode (2 Ω, 24V, THD+N=1 percent)

• Excellent audio performance

-THD+N ≤ 0.03 percent: 1W, 1kHz, PVDD=12V

-SNR signal-to-noise ratio 114 dB (weighted)

-Bottom noise ≤ 37 uVrms 

-28 mA low static current

-88 percent efficiency, 4 Ω load, 2 × 40W/PVDD=20V

• Excellent audio performance

-I2C can choose 4 device communication addresses

-I2S, left aligned, right aligned, TDM audio format

-Three line digital audio interface without MCLK

-Sampling rate 32kHz, 44.1kHz/48kHz, 88.2kHz/96kHz

-SDOUT digital audio output supports echo cancellation - supports 1.1/2.1 system echo cancellation

• Advanced Sound Effects Algorithm

-Flexible digital and analog gain adjustment

-DC blocking high pass filter

-Input signal router for left and right channels

-Independent left and right channels with 2 × 15 BQs, plus 2 × 5 post BQs to enhance sound effect adjustment

-The anti knock compressor adjusts the volume back and forth to dynamically maintain the digital margin in audio processing

-3-stage DRC, time delay interface combined with backend equalizer to achieve smooth multi stage sound control

-Programmable settings for low signal bass enhancement

• Protection mechanism

-Fault status output

-OCP overcurrent protection

-OTP overheating protection

-UVLO overvoltage and undervoltage protection

-Digital audio clock check

  Product Applications

• Portable speaker: Bluetooth speaker,

• Voice assistant speaker;

• Home audio: TV, sound bully, box, home theater;

• Laptops, Desktops

  Specifications

Actual product photos

Product Data Book：

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