AC dc power supply is a high-precision DC linear power supply with continuously adjustable voltage and current, automatic conversion between voltage regulation and current regulation. The DC output voltage can be continuously adjusted from 0 volts, stable and reliable. The output current can be selected arbitrarily, with current limiting protection and long-term short-circuit protection. When the power supply works in a regulated state, the regulated current part is the protection circuit; when it works in a regulated current state, the regulated voltage part also acts as a voltage limiter, and the two protect each other to ensure safe and reliable power consumption.

The ac dc power supply is divided into two series: single output and dual output. The dual output power supply can not only output different voltage values, but also can be connected in series or parallel to form a positive and negative power supply or expand the output current capability of the power supply. controlled by the mains power supply.

ac dc power supply also has small size, good performance and beautiful appearance, and can be widely used in industrial production, college laboratories, research institutes, post and telecommunications and automation equipment.

The ac dc power supply is composed of transformer step-down, rectification and filtering, reference power supply circuit, reference voltage circuit, voltage stabilization, current stabilization comparison amplifier circuit, adjustment circuit and current stabilization sampling circuit. When the output voltage fluctuates due to the change of the power supply voltage or the load current, the fluctuating signal is compared with the reference voltage by the voltage regulator sampling circuit, and the error signal obtained is amplified by the comparator amplifier, and then the amplifier circuit controls the adjustment tube to adjust the output voltage to Desired point.