Cirrus CS35L00 2.7W x 4高效D类音频放大方案

Cirrus 公司的CS35L00是 2.7 W 高效单声道D类音频放大器，采用无滤波器混合型D类架构，静态电流小于1mA，10% THD+N时能向4欧姆提供2.7W功率，A加权SNR为-98dB，主要用于手机，上网本，PND，有源扬声器和手提游戏机。本文介绍了CS35L00主要特性，方框图，SD和FSD模式以及HD和FHD模式的典型连接框图，CDB35L00-X4 放大器演示板主要特性，电路图和材料清单（BOM）。
The CS35L00 is a 2.7 W high efficiency Hybrid Class-D audio amplifier with low idle current consumption and a selectable gain.
The CS35L00 features an advanced closed-loop architecture to provide 0.02% THD+N at 1 W and -75 dB PSRR at 217 Hz.
A flexible Hybrid Class-D output stage offers four modes of operation: Standard Class-D (SD) mode offers full audio bandwidth and high audio performance; Hybrid Class-D (HD) mode offers a substantial reduction in idle power consumption with an integrated Class-H controller; Reduced Frequency Class-D (FSD) mode reduces the output switching frequency, producing lower electromagnetic interference (EMI); and Reduced Frequency Hybrid Class-D (FHD) mode produces both the lower idle power consumption of HD mode and the reduced EMI benefits of FSD mode.
Requiring minimal external components and PCB space, the CS35L00 is available in a 3.0 mm x 3.0 mm, 10-pin DFN package in Commercial grade (-10℃ to +70℃).
CS35L00主要特性：
Filterless Hybrid Class-D Architecture
– <1 mA Quiescent Current
– 1 x 2.7 W into 4 ohm (10% THD+N)
– 1 x 2.1 W into 4ohm (1% THD+N)
– 1 x 1.6 W into 8 ohm (10% THD+N)
– 1 x 1.3 W into 8 ohm (1% THD+N)
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Advanced Delta-Sigma Closed-loop Modulation
– 98 dB Signal-to-Noise Ratio (A-Weighted)
– 0.02% THD+N @ 1 W (SD & HD Mode)
Integrated Protection and Automatic Recovery for Output Short-circuit and Thermal Overload
Pin-compatible 9-ball WLCSP family for easy upgrade path
– CS35L01: +6 dB default Gain
CS35L03: +12 dB default Gain
Pop and Click Suppression
CS35L00主要应用：
Mobile Pho...