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这是我刚刚画完的采用专用AB类耳机放大集成电路APA3541制作的耳机放大器线路图，此线路具有IC外围元器件少（共15个元器件），工作稳定，可靠性高，由于采用的工作电压为5V，因此可以直接由电脑的USB口输出电压供其工作，省去了另外设计制作电源部分的麻烦。
印刷板图正在设计中，一旦设计完成即贴出来供大家分享。
具体的性能参数请参见图中所列。[/SIZE]
以下是原始的英文介绍资料：
APA3541 Class AB Stereo Headphone Driver with Mute
Features
High Signal-to-Noise Ratio
High Slew Rate
Low Distortion
Large Output Voltage Swing
Flexible Mute Function
Excellent Power Supply Ripple Rejection
Low Power Consumption
Short-circuit Elimination
Wide Temperature Range
No Switch ON/OFF Clicks
Integrated Voltage Divider (VDD/2) to Eliminate External Resistors
Applications
Portable Digital Audio
General Description
The APA3541 is an integrated class AB stereo headphone driver contained in an SO-8 or a DIP-8 plastic package with Mute feature . Besides the common Mute feature, the APA3541 further integrates a voltage divider inside the chip. Thus, the external resistors can be eliminated. The APA3541 has a fixed gain of 0dB so that external gain setting is unnecessary. The device is fabricated in a CMOS process and has been primarily developed for portable digital audio applications. |
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发表于 2004-3-3 00:24:43
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