Design equations and circuit diagrams for 50V, 100V, 150V DC power supplies for piezo actuator

The discussion focuses on designing DC power supplies of 50V, 100V, and 150V for piezo stack actuators, emphasizing the need for critical parameters such as current requirements and input voltage (assumed 120VAC). Due to the typically low current draw of piezo actuators, simple solutions like bridge rectifiers combined with resistor dividers and zener diodes are suggested for voltage regulation. Transformer selection should consider voltage and current ratings appropriate for the desired output. Capacitor sizing and voltage ratings are also important for smoothing the rectified output. Voltage multiplier circuits and switch-mode boost converters are proposed alternatives, especially for battery-powered applications. For mains-powered supplies, a bridge rectifier and capacitor can yield about 170V DC, which can be regulated down using zener diodes or series resistors, though power dissipation in resistors can be a limiting factor. Most standard power supply components are designed for voltages below 24V, making high-voltage designs more challenging. A reference to the Analog Devices AD5535B digital-to-analog converter is provided as a potential component for precise voltage control. Overall, the design requires detailed knowledge of load current, input voltage, and desired voltage stability to select appropriate components and circuit topologies.
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