摘要
为了减小能耗,提高效率,实现电路贴片化,同时又能获得比较理想的音质,提出了一种D类功率放大器设计方案。以STA335BW为主芯片,配以优质的二阶低通滤波器,就能构成高性能的D类功率放大器。实践表明,此功率放大器的输出功率可达2×16 W,总谐波失真度(THD)在1%以下,电路效率可达90%,频响范围可达20 Hz^20 k Hz。该放大器可用于数字声像设备中,具有广阔的应用前景。
In order to reduce energy consumption,improve efficiency, achieve SMD circuit, as well as gain ideal acoustics, a scheme is proposed of class D power amplifier design. The STA335BW is used as the main chip ,with excellent second-order low-pass fiher, which can constitute a high-performance class D power amplifier. Practice results show that the power am- plifier output power can be up to 2×16 W , total harmonic distortion （THD） under 1%, circuit efficiency up to 90%, and fre- quency response up to 20 Hz-20 kHz. The amplifier can be used in digital audio-visual equipment,which has a broad ap- plication prospect.
出处
《电声技术》
2016年第2期28-31,共4页
Audio Engineering
