A dc-dc power converter topology circuit

Abstract

The present invention relates to a DC-DC power source converter topologically structured circuit. The DC-DC power source converter topologically structured circuit comprises a push-pull type power source converter input circuit, a transformer, a push-pull type power source converter output circuit and a series type converter circuit, wherein the push-pull type power source converter input circuit, the transformer and the push-pull type power source converter output circuit are connected with one another sequentially, and the series type converter circuit is connected with the push-pull type power source converter input circuit; input voltage is connected with the transformer; a load is connected with the output end of the push-pull type power source converter output circuit; the input voltage is pushed to the push-pull type power source converter output circuit through the push-pull type power source converter input circuit and the transformer, and then is shaped by the push-pull type power source converter output circuit, so that output DC voltage can be obtained; the series type converter circuit detects the change of the output voltage and adjusts the proportion of on time and off time of the series type converter circuit in real time, so that the DC voltage of the push-pull type power source converter input circuit can be adjusted, and therefore, stable output can be realized. Compared with the prior art, the DC-DC power source converter topologically structured circuit of the invention meets the requirement for outputting a high-quality power source in an ultra-wide input voltage range, and has the advantages of simple structure, easiness in control, excellent performance and low cost.

Description

technical field [0001] The invention relates to a DC-DC power supply circuit, in particular to a DC-DC power converter topology circuit. Background technique [0002] At present, there are two types of topologies used in DC / DC isolated switching power supplies: flyback and forward. The output power quality of the flyback switching power supply is poor; the output power quality of the push-pull switching power supply of the forward type is good, but the input and output adjustment range is small; the single-ended forward switching power supply has a large input voltage range, but the output power Poor quality; the bridge switching power supply has a large output power, but the control circuit is complicated, and the output power quality is poor. None of the above power supply topologies can meet the requirement of outputting high-quality power within an ultra-wide input voltage input range. Contents of the invention [0003] The purpose of the present invention is to prov...

AI Technical Summary

Problems solved by technology

The output power quality of the flyback switching power supply is poor; the output power quality of the push-pull switching power supply of the forward type is good, but the input and output adjustment range is small; the single-ended forward switching power supply has a large input voltage range, but the output power Poor quality; the output power of the bridge switching power supply is large, but the control circuit is complicated, and the quality of the output power is poor

None of the above power supply topologies can meet the requirements of outputting high-quality power within an ultra-wide input voltage input range

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