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要有不俗的音质表现,并要足够大的音量,同时,注意到这是手持产品,能耗必须考虑。
看起来这是一些矛盾的难题。
从芯片角度讲,
cirrus logic 公司刚推出一款芯片,专门针对手机市场,GPS等。相信可以解决这些问题。
主要指标:
Low Power Codec with Digital Speaker Amp
1.8V or 2.5V core power supply
2.5V or 5V Class D amplifier supply
1.8V to 3.3V digital interface supply
40-lead QFN package, 6x6, RoHS compliant
Stereo Digital Class-D Speaker driver
Full bridged output configuration
High performance output, 0.1%dB THD+N
2 x 110mW into 8W at 3.6V
2 x 94mW into 8W at 2.5V
High power output, 10% THD+N
2 x 550mW into 8W at 3.6V
2 x 230mW into 8W at 2.5V
No external components
82% Efficiency
Low R(ds) On - .9Ω
Direct connect to battery
DC supply level monitoring & compensation
[em16]
有兴趣者可以与我联系,QQ:89010137,EMAIL:mikle@lestina.com.cn |
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