I2S digital power amplifier
ACM8628
ACM8628 is a fully integrated, high efficiency, stereo Class-D audio amplifier with digital inputs. The application circuit requires few passives components to operate with 4.5V to 26.4V PVDD supply, 3.3V DVDD supply. It can drive 2×41W output power into BTL 6Ω and 1×82W into PBTL 3Ω@1% THD+N. ACM8628 features one novel PWM modulation architecture, which adjusts PWM common duty cycle during start-up phase to avoid startup pop click. Spread spectrum technology provides lower EMI radiated emissions. It allows inductor free application with specified output power situation with ACM8628. The advanced audio effect tuning capability inside ACM8628 provides one highly integrated solution. It allows turning on / off each block with highly free operations. Both pre and post BQs / volume helps a lot to maintain audio headroom. Furthermore, 3 band DRC with time delay buffer and post compensation BQs is available to implement flexible and flat multiple band control.
