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FOD2711A — Optically Isolated Error Amplifier
June 2010
FOD2711A
Optically Isolated Error Amplifier
Features
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Optocoupler, precision reference and error amplifier in
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Description
The FOD2711A Optically Isolated Amplifier consists of
the popular AZ431L precision programmable shunt ref-
erence and an optocoupler. The optocoupler is a gallium
arsenide (GaAs) light emitting diode optically coupled to
a silicon phototransistor. The reference voltage toler-
ance is 1%. The current transfer ratio (CTR) ranges from
100% to 200%.
It is primarily intended for use as the error amplifier/
reference voltage/optocoupler function in isolated AC to
DC power supplies and dc/dc converters.
When using the FOD2711A, power supply designers can
reduce the component count and save space in tightly
packaged designs. The tight tolerance reference elimi-
nates the need for adjustments in many applications.
为了在产品众多、竞争激烈的市场上使产品与众不同，手持设备的制造商们往往把电池寿命和电源管理作为手机、PDA、多媒体播放器、游戏机、其它便携式消费类设备等产品的关键卖点来考虑。用户是从电池寿命这方面来看待电源管理的成效，其实它是多种因素共同作用的结果，这些因素包括 CPU 功能、系统软件、中间件，以及使用户可以在更长的充电或更换电池的间隔时间内享用各自设备的策略。 电源管理范围 任...[详细]
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