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Eggtronic has expanded its EcoVoltas family of high-efficiency AC/DC architectures with the new SmartEgg zero voltage switching (ZVS) PFC and regulator solution. The SmartEgg solution is designed for power applications in the 75 W to 1 kW range that need both output voltage regulation and power factor correction.
The ZVS solution is said to enable a much higher no-load-to-full-load efficiency.
“Forced ZVS under every load condition delivers efficiencies of up to 95% at full load and 92% at light load,” said the company.
SmartEgg can achieve power densities of 30 W/in3, according to the company. The new architecture also delivers a 50 percent smaller bill of materials (BOM) than conventional converters. It is also said to be one of the first platforms to support the new USB Power Delivery Revision 3.1 specification, delivering up to 240 W of power over full-featured USB Type-C cables and connectors.
SmartEgg consists of an input rectifier (solutions are based on either an input bridge or bridgeless rectifier), two primary FETs, two secondary FET rectifiers, a single magnetic component, and a few capacitors. The main controller manages PFC and output voltage regulation, ZVS, and frequency control.
Traditional medium-power AC/DC PFC architectures use a boost PFC input stage and an LLC stage that controls the output voltage, said Eggtronic. In comparison, the SmartEgg cuts the number of MOSFET and magnetic components in half by replacing these two stages with a single-stage converter capable of controlling both input current and output voltage.
Eggtronic can create custom designs based on the new SmartEgg architecture or can provide the reference design together with the IC controller. Output options are fixed voltage, CC/CV battery charger, and USB PD 3.1. The first fixed-voltage reference design is available now. A multi-port USB PD 3.1 compliant version will be available in May 2022.
Target applications include adapters and chargers for high-performance laptops and power adapters for PCs, home appliances and TV panels. Eggtronic is exhibiting at APEC 2022 in booth #1823.
