source:Charger Popular:adapter release time:2021-03-12 17:36:14 Article author:sznbone
We all know that power adapters and charger products generally increase in power and increase in volume. In recent years, fast-charging chargers have also become standard for mobile phones, and the power of the chargers has become larger and larger, so the size of the mobile phone chargers has gradually increased. So is there a way to control the volume while increasing the power?
To be miniaturized, but also to improve its efficiency, improve product consistency, and reduce the possibility of EMI problems. However, miniaturization will increase the unit power density of the product.
Electronic transformers have always been power supply equipment and devices, which can reduce the size, increase the power density, and realize the modularization. Although the introduction of high-frequency conversion technology into the power supply can get rid of the bulky power-frequency transformer, a high-frequency transformer with a ferrite core is also required. Although the volume of the ferrite core high frequency transformer is smaller than the power frequency transformer, it is still far from the requirement of modularization. It is not only too large in size, but also its heat and leakage inductance are not small. Therefore, in recent years, many experts, scholars and engineers have been studying solutions to this problem.
The successful research and development of high-frequency flat-panel transformers made a leap in transformer technology. It can not only reduce the volume of the transformer a lot, but also make the temperature rise inside the transformer very low, the leakage inductance is very small, the efficiency can be 99.6%, and the cost is half lower than the general transformer of the same power. It can be used as AC/DC and DC/DC converters in single-ended forward, flyback, half-bridge, full-bridge and push-pull converters. It is especially suitable for low-voltage and high-current converters. It fits the contradictions of low high-voltage charging voltage conversion efficiency and large low-voltage charging current encountered in the design of fast charging, as well as the troubles of pursuing miniaturization.
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