Eggtronic ClassEgg AC-DC power controller evaluation board

Eval board for EPIC201ACCD power controller IC implements 55” TV power supply that achieves 94.5% efficiency and offers reduced BoM cost

Engineers who like the high efficiency and low bill-of-materials cost of the Eggtronic ClassEgg® architecture for servers, TVs, appliances and other high power consumers can get up to speed quickly by using the EPIC201ACCD evaluation board.

The board implements a power supply offering a 238W nominal power output suitable for a 55” TV panel. It achieves peak efficiency of 94.5%, and power density of 3.92W/inch3. Peak power output is 310W. The EPIC201ACCD evaluation board includes over-voltage and over-current protection features.

Unlike power controllers from companies such as STMicroelectronics or Infineon, which require the designer to implement the architecture themselves to fit their application, the ClassEgg architecture is pre-configured and optimised by Eggtronic for a boost PFC and isolated dual-output LLC topology operating at power levels of up to 500W.

With everything working together perfectly – including the EPIC201ACCD primary-side controller and a proprietary ClassEgg synchronous rectifier on the secondary side – the Eggtronic circuit can achieve total peak efficiency higher than 95%, as well as a reduced bill-of-materials (BoM) compared to traditional boost PFC + LLC converters. Efficiency is flat across the load range from light to full load.

The EPIC201ACCD integrates a boost PFC and a dual-output, isolated LLC resonant regulator in a single IC. Efficiency of the boost PFC stage is higher than 98%, and 97% for the LLC stage.

The boost PFC stage implements an enhanced interleaved converter with a proprietary magnetic component based on two weakly coupled windings on the same core.

The LLC converter is based on a matrix-fashion transformer and a synchronous rectifier that hybridates the voltage doubler and the full bridge rectifiers, to achieve excellent regulation of both the outputs.

The ClassEgg architecture is best suited to use in power supplies for home appliances, TV panels, servers, computers, and a wide range of applications in the consumer and industrial domains.

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