公开(公告)号：US20240356459A1

公开(公告)日：2024-10-24

申请号：US18337154

申请日：2023-06-19

Applicant: Richtek Technology Corporation

Inventor： Tsan-Huei Wu ,  Tsung-Wei Huang ,  Ye-Sing Luo

IPC: H02M7/5395 ,  H02M1/00

CPC classification number: H02M7/5395 ,  H02M1/0012 ,  H02M1/0019

Abstract: A power conversion system includes: first and second switches, a switching power converter, a battery switch and a conversion control circuit. In an external power mode, the first and second switches are controlled to generate an intermediate power from a first power and generate a second power from the intermediate power for powering an external load. In a battery power mode, the conversion control circuit controls the battery switch, the switching power converter and the second switch to generate a system power from a battery power, convert the system power to generate the intermediate power and generate the second power from the intermediate power. In the external power mode, the switching power converter is controlled to enter the battery power mode when the intermediate voltage is reduced to a transient state threshold, wherein a minimum voltage level of the intermediate power is close to a minimum voltage regulation level.

公开(公告)号：US12224683B2

公开(公告)日：2025-02-11

申请号：US18337154

申请日：2023-06-19

Applicant: Richtek Technology Corporation

Inventor： Tsan-Huei Wu ,  Tsung-Wei Huang ,  Ye-Sing Luo

IPC: H02M3/158 ,  H02J7/00 ,  H02M1/00 ,  H02M7/5395 ,  H02M3/156

Abstract: A power conversion system includes: first and second switches, a switching power converter, a battery switch and a conversion control circuit. In an external power mode, the first and second switches are controlled to generate an intermediate power from a first power and generate a second power from the intermediate power for powering an external load. In a battery power mode, the conversion control circuit controls the battery switch, the switching power converter and the second switch to generate a system power from a battery power, convert the system power to generate the intermediate power and generate the second power from the intermediate power. In the external power mode, the switching power converter is controlled to enter the battery power mode when the intermediate voltage is reduced to a transient state threshold, wherein a minimum voltage level of the intermediate power is close to a minimum voltage regulation level.

公开(公告)号：US20230231398A1

公开(公告)日：2023-07-20

申请号：US18058312

申请日：2022-11-23

Applicant: Richtek Technology Corporation

Inventor： Kuan-Yu Chen ,  Tsung-Wei Huang ,  Tsan-Huei Wu ,  Ye-Sing Luo

IPC: H02J7/00

CPC classification number: H02J7/0063 ,  H02J7/007 ,  H02J7/00304 ,  H02J7/00714

Abstract: A charger circuit includes a power stage circuit operating at least one power switch according to an operating signal to convert an input power into an output power to charge a battery and/or to provide the output power to a load, wherein the output power includes a charging power and/or a load power; a control generating the operating signal according to a voltage amplifying signal; and a voltage error amplifier circuit comparing a voltage sensing signal relevant to a charging voltage of the charging power or a load voltage of the load power with a voltage reference level in a voltage hysteresis mode of a discontinuous conduction mode, so as to generate the voltage amplifying signal; wherein the control circuit adjusts the charging voltage or the load voltage according to the voltage amplifying signal, so as to maintain the charging voltage or the load voltage within a predetermined range.