140W USB-C PD 3.1 based on totem pole PFC + regenerative ZVS flyback converter
The ERD00708-EVB140R0.0.1 is an evaluation board (EVB) demonstrating the high performance of Eggtronic’s EPIC chipset bundle. This reference design combines a Totem-Pole PFC (TP-PFC) stage with a Regenerative ZVS Flyback (QuarEgg®) to deliver a high-efficiency cost-effective 140W USB Power Delivery (PD) 3.1 solution. The underlying architecture is engineered to unlock ultra-high power density and efficiency in high performance USB-C power adapters.
Operating from a universal input of 90VAC to 264VAC, the system provides anUSB-C output supporting up to 28V at 5A. The QuarEgg® architecture ensures regenerative Zero-Voltage Switching (ZVS) across the entire load range, achieving 95.5% peak efficiency and over 92% at light loads. It also features Eggtronic’s CapTx optoless digital isolation, which replaces traditional optocouplers and digital isolators with an integrated high-speed ultra-low-latency digital feedback loop to improve transient response and reliability.
The proprietary Totem-Pole PFC delivers ultra-high efficiency and significantly reduced EMI, enabling smaller filtering capacitors than conventional Totem-Pole solutions while allowing full control integration with the QuarEgg™ Flyback.
The system is powered by an all-in-one bundle made of 2 EPIC controllers that integrates TP-PFC, QuarEgg regenerative ZVS Flyback control, Synchronous Rectification (SR), digital communication, and PD 3.1 protocols into a simplified two-chip solution. This high level of integration significantly reduces the total IC count and external components compared to standard AHB or Boost PFC benchmarks. Furthermore, advanced power management keeps standby power consumption below 75mW, fully meeting DoE Level VII efficiency standards.
Comprehensive safety features include Over-Current (OCP), Short-Circuit (SCP), and robust thermal protections, all validated for EN55032 Class B EMC compliance in both 2-pin and 3-pin configurations. With an optimized BOM and high efficiency, this reference design offers a highly cost-effective path to high-density charging. It is an ideal platform for developing the next generation of premium laptop chargers and high-power consumer electronics.
Dimensions: 73 × 73 × 20.5 mm (L × W × H)
Typical applications
Key features
- Based on the Eggtronic combo controller TP_PFC + ZVS Flyback Architecture
- 140W PD 3.1 Output Power
- Peak Power Conversion Efficiency > 95.5% and maintains over 92% efficiency at lower loads
- All-in-one bundle integrating Totem-Pole PFC control, ZVS Flyback PWM, Synchronous Rectification (SR), and PD 3.1 protocol handler into two ICs.
- Ultra-Low Standby Power: Standby power consumption of less than 75 mW, fully compliant with DoE
- Cost-Optimized BOM: Reduced component count compared to other typical designs
- Guaranteed Zero-Voltage Switching (ZVS) across all load and input voltage conditions
- Rigorously tested for EN55032 Class B EMC compliance in both 2-pin and 3-pin configurations
Simplified schematic
Controllers
EPIC2ACB04
PFC Digital Controller + QuarEgg Auxiliary Controller (Bundle with EPIC2ACQ07)
- Integrated PFC TotemPole Control
- Integrated EMC Reduction Control Strategy
- Integrated Auxiliaries QuarEgg control Strategies
- Integrated Property RX-CAPTX communication
- QFN40
- 6mm x 6mm
- 40 pins
EPIC2ACQ07
Secondary side QuarEgg Digital Controller (Bundle with EPIC2ACB04)
- Proprietary QuarEgg Control algorithm
- Integrated PD 3.1 support with customizable capabilities
- Integrated ZVS and Synchronous Rectification control
- Integrated Property TX-CAPTX communication
- QFN40
- 6mm x 6mm
- 40 pins