摘要：双方目前的组合电流检测放大器和倍增器（ MAX4211F ）感官和负载两端的电压，其输出（ POUT的）电压成正比，即这些变量的连续产品的供应，成正比负载的瞬时功率。外部运算放大器产生相应的PWM （脉宽调制）输出信号，控制与负载串联p沟道MOSFET 。 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……