Power supply device and single optical coupler circuit thereof

Abstract

The invention relates to a power supply device and its single optocoupler control circuit, wherein the power supply device includes a single optocoupler control circuit, a main converter and an auxiliary converter. The main converter is connected to the output load. The auxiliary converter is connected in parallel with the main converter. The single optocoupler control circuit is connected with the output load to detect the working state of the power supply device and control the main converter and the auxiliary converter accordingly. The single optocoupler control circuit has only a single optocoupler. Wherein, when the power supply device works in the normal working mode, the main converter and the auxiliary converter jointly provide the first output to the output load; and when the power supply device works in the standby mode, the main converter is turned off so that it does not work, Only the auxiliary converter provides the second output to the output load.

Description

technical field [0001] The invention relates to a power supply device, in particular to a power supply device which only needs a single optocoupler and its single optocoupler control circuit. Background technique [0002] Today, with the increasing demand for energy, saving energy has become the consensus of everyone. For example, in electrical equipment, standby loss is an important part of its power consumption, so it has attracted more and more attention. At present, various environmental protection organizations and some government agencies in the world have formulated some plans and regulations to promote the reduction of standby loss. For example, for notebook computers, high power conversion efficiency and low standby power consumption are very important requirements. For switching power supplies, the standby loss of switching loss is the most important part. In the traditional solutions for reducing the standby loss of switching power supplies, the reduction of st...

AI Technical Summary

Problems solved by technology

[0005] However, according to the existing traditional feedback design, this parallel structure needs to configure two feedback circuits, and each feedback circuit (mainly optocoupler) will cause considerable standby loss

This standby loss often fails to comply with increasingly stringent standby loss standards

At the same time, under the requirement of low cost, it is more difficult for two converters with one large power and one small power to achieve ideal power distribution.

In other words, there are at least two problems in the prior art: one is the power distribution of the two converters; the other is the standby loss caused by the added feedback circuit.

[0006] This shows that the above-mentioned existing power supply device obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.

In order to solve the problems existing in power supply devices, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time, and there is no suitable structure for general products to solve the above problems. Obviously, it is a problem that relevant industry players are eager to solve.

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