高边电流检测放大器工作在高电压

摘要：该电路修改一个标准的32V高侧电流监视器来测量负载电流（至30mA） ，同时可容纳任何高电压水平，受外部元件的限制。 （显示组件允许测量到4A 。 ）
Maxim > App Notes > Amplifier and comparator circuits Measurement circuits Power-supply circuits
Keywords: high-side current sensing, high voltage, current-sense amplifiers Aug 30, 2004

APPLICATION NOTE 3331
High-Side Current-Sense Amplifier Operates at High Voltage


Abstract: This circuit modifies a standard 32V high-side current monitor to measure load current (to 30mA) while accommodating
any level of high voltage, subject to limitations in the external components. (The components shown allow measurements to 4A.)

The simplest technique for measuring current in an actuator or motor is to monitor its ground current by sensing the voltage drop
across a small resistive element, added between the load and ground. Because the device and its asso