Is the adjustment range of a regulated power supply better when it is smaller?
The technical indicators of regulated power supplies can be divided into two categories: one is characteristic indicators, such as output voltage, output current, and voltage regulation range; Another type is quality indicators, which reflect the advantages and disadvantages of a regulated power supply, including stability, equivalent internal resistance (output resistance), ripple voltage, and temperature coefficient.
1. Characteristics and indicators of regulated power supply
(1) High output current
It depends on the maximum allowable working current of the main regulator, the capacity of the transformer, and the maximum rectification current of the diode.
(2) Output voltage and voltage regulation range
This can be determined according to the requirements of the user. For devices that require a fixed power supply, the adjustment range of the regulated power supply should be smaller, and the voltage value will not change once it is adjusted. For adjustable output voltage power supplies, their output range is mostly adjusted from zero volts, usually requiring a wider voltage regulation range and continuous adjustability.
(3) Protection features
In a DC regulated power supply, the regulating tube may be damaged when the load current is overloaded or short circuited. Therefore, a fast response overcurrent protection circuit must be adopted. In addition, when there is a fault in the regulated current, the output voltage may become too high, which can pose a threat to the load. Therefore, an overvoltage protection circuit is also required.
(4) Efficiency
A regulated power supply is a transducer, therefore, there is also an issue of energy conversion efficiency. Improving efficiency mainly involves reducing the power consumption of the regulating tube.
