Maxim: Controlling a Variable Voltage Power Supply Using the DS1809
This article discusses controlling a voltage regulator using a digital potentiometer with pushbutton controls, the DS1809, which give a “human interface” to the control of the voltage regulator. This can be used as reference for other digitally controlled power supplies using other digital potentiometers which can be controlled by a microprocessor. This lends itself to applications where system voltage levels are adjusted to optimum levels (during the manufacturing process) to provide the optimum margin of error between the supply voltage and the operating voltage of the devices in the circuit.
Controlling a Variable Voltage Power Supply Using the DS1809 (Pushbutton Control) Semiconductor topic: Many linear and switched-mode power supplies and voltage regulators use a resistor network as feedback into the regulator to adjust the voltage output. This is typically done either by varying the values of the individual resistors or using a mechanical potentiometer. This article discusses controlling a voltage regulator using a digital potentiometer with pushbutton controls, the DS1809, which give a “human interface” to the control of the voltage regulator. This can be used a reference for other digitally controlled power supplies using other digital potentiometers which can be controlled by a microprocessor. This lends itself to applications where system voltage levels are adjusted to optimum levels (during the manufacturing process) to provide the optimum margin of error between the supply voltage and the operating voltage of the devices in the circuit.
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