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Power-transistor slew-rate controller employing only a single capacitor per half-bridge
Power-transistor slew-rate controller employing only a single capacitor per half-bridge
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机译:每个半桥仅使用一个电容器的功率晶体管摆率控制器
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摘要
In a half-bridge output stage employing a complementary pair of output power transistors, each driven through an integrating stage for controlling the slew-rate, a single integration capacitance is conveniently shared by the two integrating stages that drive the power transistors. A pair of switches connect the single integrating capacitance to the input of either one of the two integrating stages and are controlled by a pair of nonoverlapping signals that have a certain advance with respect to the pair of logic signals that drive the half- bridge stage. In the case of a driving system of a multi-phase machine, the two configuring switches of the single integration capacitor may be driven by a pair of control signals that drive a different phase winding of the multi-phase machine, thus eliminating the need for dedicated circuitry for generating said pair of anticipated signals to control the configuration switches.
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