Multi-path output power supply

Abstract

The invention relates to a multi-output power, in particular to a multi-output power which can improve the load adjustment rate of an auxiliary circuit for the multi-output power, which comprises a transformer and an output circuit of a main circuit and at least one output circuit of the auxiliary circuit which are connected with a secondary line winding of the transformer; the output circuit of the main circuit and the output circuit of the auxiliary circuit are respectively in series with different windings of a transformer; a terminal of the output circuit of the main circuit which flows into the winding of the main circuit and a terminal of the output circuit of the auxiliary circuit which flows into the winding of the auxiliary circuit are dotted terminals. The invention has the advantages of no consumption, maximized adjustment rate for the output load of the auxiliary circuit, greatly improving voltage stabilized precision of the auxiliary circuit output, no requirement for regulating turns of the transformer; direct quantum chemistry calculation provided by the transformer, no effect from duty ration, extremely low cost of implementation, extremely high performance-price ratio, and improved feature of electromagnetic capability in relevant output circuits.

Description

technical field [0001] The invention relates to a multi-channel output power supply, in particular to a power supply capable of improving the load regulation rate of an auxiliary circuit in the multi-channel output power supply. Background technique [0002] At present, in the multi-output power supplies used in the industry, generally only one output can be selected as the main output. The selection of the main output is generally based on the importance of each output, the requirements for voltage regulation accuracy, load current and stability. and other factors to choose. After the main channel is selected, the output of other channels will be the auxiliary channel output. Since the main circuit has main feedback, the voltage regulation accuracy of the output of the main circuit is relatively high, but the voltage regulation accuracy of the output of other auxiliary circuits is relatively poor. The voltage regulation accuracy of the auxiliary circuit output is affected...

AI Technical Summary

Problems solved by technology

[0004] To sum up, for this kind of output circuit with a wide range of voltage regulation accuracy, although the application of secondary voltage regulation technology can improve the actual voltage regulation accuracy, it will inevitably bring about the following problems: (1) The output cost of this circuit is greatly increased , the cost performance is extremely poor; (2) The inevitable loss caused by the secondary voltage regulation leads to a decrease in power supply efficiency; (3) The heat loss of the secondary voltage regulation requires a radiator or other forms of heat dissipation area for heat dissipation, and the heat lost It will inevitably increase the thermal stress of the surrounding devices, resulting in reduced reliability; (4) The secondary voltage regulator circuit will increase the volume and PCB area of ​​the power supply, which is very unfavorable for the current miniaturization of the power supply; (5) The number of turns of the transformer increases, and the winding The difficulty and cost of the manufacturing process will increase; (6) It is impossible to perform voltage compensation for the output circuit with a low output voltage; (7) There may be EMC interference problems

Images