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简单、 高效且价格低廉的恒功率驱动器

资料介绍
测放大器和倍增器 (MAX4211F) 跨负载,感官的通过电流和电压和用品在其产出 (撅嘴模样) 电压成正比的这些变量,连续的产品之一即成比例的负载瞬时功率。外部放大器生成控制 p 通道 MOSFET 负荷系列中的相应 PWM (脉冲宽度调制) 输出信号。
Maxim > App Notes > Amplifier and Comparator Circuits Circuit Protection
Keywords: constant-power drivers, resistive loads, chopped-DC drive, op amps, analog multipliers, current-sense amplifiers Nov 29, 2010

APPLICATION NOTE 4523
Constant-Power Driver Is Simple, Efficient, and Inexpensive


Abstract:A combination current-sense amplifier and multiplier (MAX4211F) senses both the current through and voltage across
the load, and supplies at one of its outputs (POUT) a voltage proportional to the continuous product of those variables, i.e.,
proportional to the load's instantaneous power. External op amps generate a corresponding PWM (pulse width modulated) output
signal that controls a p-channel MOSFET in series with the load.

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简单、 高效且价格低廉的恒功率驱动器
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