1 Overview of digital adjustable regulated power supply
DC stabilized power supply is often applied in electronic equipment, which can make the voltage and power grid more stable and ensure the normal output of voltage. At this stage, with the continuous growth of the types of electronic products, the digital adjustable regulated power supply has played a very important role in electronic products. It makes the circuit more stable during operation, and its role in electronic technology has become increasingly prominent. . The adjustable regulated power supply includes many modules, mainly including digital-to-analog conversion module, output circuit module, digital display module, etc. The voltage output value can be accurately controlled by pressing the button. If the button is pressed for a long time, the voltage will continue to decrease or increase. Status, the output value of the power supply voltage is displayed through the digital tube.
There are many options for the structure of the digital adjustable voltage stabilized power supply. The use of a single chip can drive the digital-to-analog conversion chip of the numerical control part to play a role and ensure the stability of the voltage. This kind of structural composition requires high precision of digital-to-analog conversion and low cost of use, but it also has many limitations, such as large function consumption and long-term software compensation. The circuit components of the adjustable voltage stabilized power supply are very complicated. In the series voltage stabilized circuit, the most important components include the reference voltage, the adjustment circuit, and the sampling circuit. If the voltage changes, the output voltage will also change accordingly. At this time, the changed voltage will be sent to the amplifier by the sampling circuit, and the change of the voltage will be compared. After the comparison of the sampling voltage is completed, the error will occur. The voltage will be amplified, and the output adjustment signal will also change. Using the change of this signal can realize the reasonable control of the adjustment tube voltage, which is beneficial to ensure the stability of the output voltage. The linear series regulated power supply will generate a large current during operation, and its voltage stabilization performance is very good, which can realize continuous adjustment of the output power supply. At present, the regulated power supply is mainly based on monolithic integrated circuits, and is widely used in electronic circuits and instruments.
In the digital adjustable regulated power supply, all circuits related to the power supply can operate normally, and the regulated power supply cannot support the load power supply. In a regulated power supply, if the output voltage is lower than the sampling voltage, the power supply will be completely cut off, and the entire circuit system will collapse. If the output voltage is greater than the sampling voltage, the power supply will work normally at this time, and the value of the sampling circuit will change greatly under the action of resistance.
