Next-generation flyback converter chipset for advanced USB-C PD adapters and chargers

The increasing popularity of USB-C PD charging raises the need for compatible chargers. Users now seek powerful yet compact adapters. Infineon Technologies AG satisfies this demand with the EZ-PD PAG2, a secondary-side controlled ZVS flyback converter chipset. This chipset, including EZ-PD PAG2P and EZ-PD PAG2S, integrates USB PD, a synchronous rectifier, and a PWM controller. It provides efficient communication and isolation between primary and secondary sides using (pulse-edge transformer) PET CYPET121. The chipset supports innovative (noncomplementary active-clamp flyback) NCP-ACF and (quasi-resonant flyback with zero voltage switching) QR-ZVS topologies for enhanced efficiency. This makes it excellent for high-efficiency USB-C adapters, chargers, and travel adapters.

The family provides a versatile, efficient power delivery solution for various applications. It offers PD 3.1 standard power range with PPS and 28V extended power range (EPR) for fast, reliable charging. Ideal for a wide range of wattages, the chipset is compatible with BC v1.2, AFC, Apple charging and QC5.0, and its universal AC line input support from 90VAC to 265VAC enhances global usability.

It supplies programmable soft-start using an external ss capacitor, offering controlled power-ups and DCM, critical conduction mode (CrCM) and CCM, and burst and skip modes for different load conditions. This adaptability makes it ideal for different regional power sources and device types. The EZ-PD PAG2 family's features ensure efficient and flexible power management for various needs.

The EZ-PD PAG2 family consists of four specialised products:

EZ-PD PAG2S-AC is a secondary-side ACF controller with efficient energy recycling and includes the USB-PD protocol functionality.

EZ-PD PAG2S-QZ, another ZVS controller, focuses on QR-ZVS flyback and includes the USB-PD protocol functionality.

EZ-PD PAG2P, a primary HV startup controller, combines various functions for improved system performance. It includes high-voltage startup, PET receiver, gate drivers, and fault protection. EZ-PD PAG2P also features an x-cap discharge and a Vcc boost converter.

EZ-PD PAG2S-PS is an integrated USB PD and SR controller that can be paired with third-party PWM controllers. It features a shunt voltage regulator for constant voltage and current control via optocouplers. It delivers best-in-class SR performance with fast turn-on/off time and supports volt-second integration to prevent false SR activation.