The characteristic index refers to the parameters indicating the working characteristics of the regulated power supply, such as input, output voltage and output current, voltage adjustable range, etc.
(1) Maximum output current. It mainly depends on the maximum allowable power dissipation and the maximum allowable working current of the main pass tube.
(2) Output voltage and voltage regulation range. Determined according to load requirements. If you need equipment with a fixed power supply, the adjustment range of the regulated power supply is preferably smaller, and the voltage value cannot be changed once it is set. For commercial power supplies, the output range is adjusted from 0V, the voltage regulation range is wider, and H is continuously adjustable.
(3) Efficiency. The regulated power supply itself is a transducer, and there is energy loss during energy conversion, which leads to the problem of conversion efficiency. To improve the efficiency is mainly to reduce the power consumption of the adjustment tube, which not only saves energy, but also improves the working reliability of the power supply.
(4) Protection characteristics. In the DC regulated power supply, when the load is overloaded or short-circuited, the regulating tube will be damaged. Therefore, there must be a fast-response overcurrent and short-circuit protection circuit in the power supply. In addition, when the regulated power supply fails, the output voltage is too high, which may damage the load. Therefore, an overvoltage protection circuit 3 is also required.
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