Bi-directional DC-DC Converter Circuit Description

Uninterruptible power supplies require a bi-directional DC-DC converter to achieve fast conversion from charge to discharge and discharge to charge. The use of a converter with a synchronous rectifier allows for bi-directional operation, and the integration of the powertrain for charging and discharging into one system provides a compact design and reduces system costs at the same time. Current-resonant type full-bridge converter is one of the most popular circuitry for high-efficiency isolated DC-DC converters. This makes it possible to achieve high efficiency with fewer parts with zero current switching realized by resonance between inductance leakage current and capacitor.
For medium-to-high power systems, buffer transistors had to be placed before the gates of MOSFET stage so it is difficult for system designer to make timing designs. In addition, the protection circuits for the power elements had to be designed individually. By using a TLP5231, designers can configure external buffers with MOSFET. It contributes not only simplifying timing design but also microcomputer software design. Moreover, it is easy to adjust MOSFET for the buffer according to the load. This enables for designer to easily fan-out of basic circuit designs and reduce design cycle time.

Examples of typical recommended products are listed below, and also provide a link to the online distributor inventory search page to buy the product.

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