双电流检测放大器简化H桥负载监控

采用正确的放大器对于设计H桥驱动器的负载电流监控并不困难，LTC6103和LTC6104完全符合这一设计要求。它们具有双检测输入和一个可选差分输出配置，这个特性可减小设计难度和电路板面积。
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Dual Current-Sense Ampliers Simplify H-Bridge Load Monitoring
Design Note 407
Jon Munson

Introduction A far more practical method is to monitor the supply
The H-bridge power-transistor topology is increasingly current fed to each half-bridge as shown in Figure 2.
popular as a means of driving motors and other loads bi- This scheme provides several benets that simplify and
directionally from a single supply potential. In most cases improve the circuit performance. The main improvement
there is great benet in monitoring the current delivered comes from having the sense resistors at a relatively
to the load and utilizing this information in real-time to