Chip Features Anti-distortion function Wide operating voltage range: 2.5V-5.5V Excellent full-bandwidth EMI suppression performance LC filter-free digital modulation, directly drives the speaker High output power: 3.0W@PVDD=VDD=5.0V, RL=4Ω, THD+N=10% High efficiency: 88%@PVDD=VDD=5.0V, RL=4Ω, PO=1W Low THD+N: 0.1%@PVDD=VDD=5.0V, RL=4Ω, PO=1W Channel isolation: 80dB@fIN=1KHz, AV=18dB High signal-to-noise ratio (SNR): 90dB@PVDD=VDD=5.0V, AV=18dB Excellent "pop-click" noise suppression performance Shutdown function Overcurrent protection Overtemperature protection Undervoltage protection Lead-free SOP16 package

Chip Description

The EG8405 is a stereo, filter-free Class D audio power amplifier with distortion prevention and ultra-low EMI. With a 5V power supply, THD+N=10%, and a 4Ω load, it delivers up to 3W of power. Its performance rivals that of AB class amplifiers, while achieving 88% efficiency. The EG8405's key feature is its distortion prevention function, which detects and suppresses output signal distortion (clipping) caused by excessively large input music or voice signal amplitudes. It also adaptively prevents output clipping due to power supply voltage drops in battery applications, significantly improving sound quality, creating a very comfortable music experience, and protecting the speaker from overload damage. By connecting different resistor and capacitor values to the NCN pin, the amplifier's sound quality and output power can be flexibly adjusted. The chip also provides an NCNOFF mode. The EG8405 uses a unique electromagnetic radiation (EMI) suppression technology, boasting superior low-radiation performance across the entire bandwidth. Even without any auxiliary design, the radiation level is far below the FCC Part 15 Class B standard, reducing the difficulty of system electromagnetic compatibility design. The EG8405 integrates filter-free digital modulation technology, enabling direct speaker drive and minimizing distortion and noise in the pulsed output signal. The minimal external components save system space and cost, making it ideal for portable applications. Furthermore, the EG8405's built-in shutdown function minimizes standby current. It also integrates shutdown, speaker output overcurrent protection, on-chip overtemperature protection, and undervoltage protection. The chip is packaged in a lead-free SOP16 package.