AO845A 3BSE045584R1 | ABB | Resonant half bridge expansion structure

Description

AO845A 3BSE045584R1 | ABB | Resonant half bridge expansion structure

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Like the active clamp topology, the AO845A 3BSE045584R1 is also a soft switching topology that achieves ultra-high efficiency due to its ultra-low switching loss. Other advantages include no need for output inductance, which can reduce the overall cost of implementation. Finally, due to the use of a half bridge configuration, the pressure on the primary components can be reduced.

On the other hand, this structure also has some drawbacks, the most important of which is the addition of complex magnetic design, high ripple current on the output capacitor, and variable frequency. Meanwhile, this structure is also difficult to design over a wide input voltage range.

Comparison of Various Topological Structures of AO845A 3BSE045584R1
Although we cannot adopt a single topology as the solution for all applications, we can decide which circuit structure to use based on specific circumstances. Here, we use transformer designs with 12V and 20A outputs to compare the differences in various structures mentioned above, with a focus on the main design issues such as primary switches, rectifiers, magnets, storage capacitors, etc. Although there are other differences, they are not within the scope of this article’s discussion. The differences in various topological structures are summarized as follows.

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