公开(公告)号：US11705821B2

公开(公告)日：2023-07-18

申请号：US17881203

申请日：2022-08-04

Applicant: GaN Systems Inc.

Inventor： Xuechao Liu ,  Paul Wiener

IPC: H02M3/335 ,  H02M3/158 ,  H02M1/00 ,  H02M1/42

CPC classification number: H02M3/33576 ,  H02M1/0009 ,  H02M1/4208 ,  H02M3/158

Abstract: An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.

公开(公告)号：US12088115B2

公开(公告)日：2024-09-10

申请号：US18494505

申请日：2023-10-25

Applicant: GAN SYSTEMS INC.

Inventor： Tiefeng Shi ,  Paul Wiener

IPC: H02J50/12 ,  H01F38/14

CPC classification number: H02J50/12 ,  H01F38/14

Abstract: High efficiency resonator coils for large gap resonant wireless power transfer (WPT), and a coil design methodology are disclosed. Resonator coils comprise a coil topology defined by coil parameters in which turn dimensions, such as trace widths and spacings of each turn, are configured to reduce or minimize a variance of the z component of magnetic field, over an area of a charging plane at a specified distance, or distance range, from the coil. A Tx resonator coil comprises a capacitor arrangement of tuning and network-matching capacitors for improved coil-to-coil efficiency and end-to-end WPT system performance, e.g. for applications such as through-wall WPT, in the range of tens of watts to at least hundreds of watts. Planar resonator coil topologies are compatible with fabrication using low cost PCB technology, e.g. with multi-layer metal, to reduce losses and improve thermal performance.

公开(公告)号：US11463012B1

公开(公告)日：2022-10-04

申请号：US17688170

申请日：2022-03-07

Applicant: GaN Systems Inc.

Inventor： Xuechao Liu ,  Paul Wiener

IPC: H02M3/335 ,  H02M3/158 ,  H02M1/00 ,  H02M1/42

Abstract: An architecture for a multi-port AC/DC Switching Mode Power Supply (SMPS) with Power Factor Correction (PFC) comprises power management control (PMC) for PFC On/Off Control and Smart Power Distribution, and optionally, a boost follower circuit. For example, in a universal AC/DC multi-port USB-C Power Delivery (PD) adapter, PMC enables turn-on and turn-off of PFC dependent on output port operational status and a combined load of active output ports. A microprocessor control unit (MCU) receives operational status, a voltage sense input and a current sense input for each USB port, computes output power for each USB port, and executes a power distribution protocol to turn-on or turn-off PFC dependent on the combined load from each USB port. Available power may be distributed intelligently to one or more ports, dependent on load. In an example embodiment, turning-off PFC for low load and low AC line input increases efficiency by 3% to 5%.