The high-frequency DC power supply can provide a stable DC power supply for the load. The electronic power supply is mostly a DC power supply. The DC power supply is mostly an AC power supply. When the voltage or load resistance of the AC power supply changes, the DC output of the regulator. The voltage will remain stable. With the development of high-precision, high-stability and high-reliability of electronic equipment, DC-regulated power supplies place high demands on the power supply of electronic equipment.
Technical specifications of DC stabilized power supply:
1. Characteristic index: reflect the inherent characteristics of DC stabilized power supply, such as input voltage, output voltage, output current, and output voltage adjustment range;
2. Quality index: reflect the advantages and disadvantages of DC stabilized power supply, including stability, equivalent internal resistance (output resistance), ripple voltage and temperature coefficient;
Limit indicator of DC stabilized power supply
1. Large input voltage: It is a large input voltage to ensure the safe operation of the DC stabilized power supply;
2. Large output current: it is a large output current that is guaranteed by the safe operation of the regulator;
Set the current limit current, press the “Limit” button on the power panel, and the current meter will display the current limit value. Adjust the current limit knob to make the current limit value reach the predetermined level. Generally, the current limit can be set at the common high current. 120%, some power supply does not have a current limit adjustment button, the user needs to short-circuit the output according to the instructions, and then set the current limit level according to the short-circuit current with the current limit knob. The simple adjustable power supply has no current limit setting function. There is no corresponding knob.
Set the overvoltage protection OVP. The overvoltage setting means further limiting an upper limit voltage within the adjustable voltage range of the power supply to avoid excessive output voltage when the power supply is misoperated. Generally, the overvoltage can be set to 120% of the normal high working voltage. Horizontal, over-voltage setting requires a flat-blade screwdriver to adjust the concave potentiometer in the panel, which is also a design to prevent misoperation.
The output voltage range that can work normally under the condition of DC regulated power supply operating conditions. The upper limit of the index is specified by the large input voltage and the small input-output voltage difference, and the lower limit is determined by the internal reference voltage value of the DC stabilized power supply. Decision; This indicator characterizes the voltage difference between the large input-output allowed under the normal operating conditions of the DC stabilized power supply. The value depends mainly on the withstand voltage specification of the internal regulator of the DC regulated power supply.
This indicator characterizes the voltage difference between the small input-output required to ensure the normal operation of the DC regulated power supply; the output load current range is also called the output current range. In this current range, the DC regulated power supply Should be able to ensure compliance with the indicators given in the indicator specifications.