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. A similar version of this articl……