公开(公告)号：US20200336062A1

公开(公告)日：2020-10-22

申请号：US16594058

申请日：2019-10-06

Applicant: Leadtrend Technology Corp.

Inventor： Yao-Tsung Chen ,  Kuan-Hsien Chou

IPC: H02M1/42 ,  H02M1/38 ,  H02M1/096

Abstract: A transmitting/receiving command method applied between a master controller and a slave controller of a power converter includes enabling the master controller and the slave controller; a controller of the master controller and the slave controller detecting a node voltage of a pin of the controller; the controller transmitting a first command of a plurality of first commands to another controller of the master controller and the slave controller through the pin when the node voltage is less than a predetermined voltage, wherein the predetermined voltage corresponds to over temperature protection of the power converter; and the controller detecting the node voltage again after the controller receives a first return signal transmitted by the another controller.

公开(公告)号：US11496061B2

公开(公告)日：2022-11-08

申请号：US17100968

申请日：2020-11-23

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Yao-Tsung Chen

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/08

Abstract: Asymmetric power converter includes an upper bridge switch, a lower bridge switch, a primary winding, a first secondary winding, a second secondary winding, a control circuit. The first secondary winding and the second secondary winding output a first output voltage and a second output voltage of a secondary side of the asymmetric power converter respectively, and voltage polarity of the first secondary winding is different from voltage polarity of the second secondary winding. The control circuit controls the lower bridge switch and the upper bridge switch according to the first output voltage and the second output voltage, respectively.

公开(公告)号：US20180323722A1

公开(公告)日：2018-11-08

申请号：US15965996

申请日：2018-04-30

Applicant: Leadtrend Technology Corp.

Inventor： Yao-Tsung Chen ,  Mao-Shih Li ,  San-Yi Li ,  Hung-Ching Lee

IPC: H02M5/22

CPC classification number: H02M3/33561 ,  H02M3/33523 ,  H02M2001/0032

Abstract: A secondary controller applied to a secondary side of a power converter includes a detector and a standby signal generation circuit. The detector is used for detecting a first signal and a second signal of a universal serial bus device, and a frequency of a synchronization signal corresponding to a primary side of the power converter. The standby signal generation circuit is coupled to the detector for delaying a first predetermined time to generate a standby signal to a primary controller of the primary side of the power converter when the detector fails to detect the first signal and the second signal, and the frequency of the synchronization signal is less than a first predetermined frequency, wherein the primary controller enters a standby mode according to the standby signal.

公开(公告)号：US20230396177A1

公开(公告)日：2023-12-07

申请号：US18234885

申请日：2023-08-17

Applicant: Leadtrend Technology Corp.

Inventor： Chih-Chi Chang ,  Meng-Jen Tsai ,  Yao-Tsung Chen ,  Ming-Chang Tsou

IPC: H02M3/335 ,  H02M1/00 ,  H02M1/38 ,  H02M3/00

CPC classification number: H02M3/33571 ,  H02M1/0058 ,  H02M1/0016 ,  H02M3/01 ,  H02M1/38

Abstract: A controller applied to a primary side of an inductor-inductor-capacitor (LLC) resonant converter includes a common-mode voltage generation circuit and a control signal generation circuit. The common-mode voltage generation circuit is used for generating a common-mode voltage. The control signal generation circuit is used for generating an upper bridge switch control signal and a lower bridge switch control signal according to a compensation voltage corresponding to an output voltage of the LLC resonant converter, a sensing voltage corresponding to an input voltage of the LLC resonant converter, and the common-mode voltage, wherein the upper bridge switch control signal and the lower bridge switch control signal control an upper bridge switch and a lower bridge switch of the primary side of the LLC resonant converter, respectively.

公开(公告)号：US20220263415A1

公开(公告)日：2022-08-18

申请号：US17308076

申请日：2021-05-05

Applicant: Leadtrend Technology Corp.

Inventor： Chih-Chi Chang ,  Meng-Jen Tsai ,  Yao-Tsung Chen ,  Ming-Chang Tsou

IPC: H02M3/335 ,  H02M1/38 ,  H02M1/00

Abstract: A controller applied to a primary side of an inductor-inductor-capacitor (LLC) resonant converter includes a common-mode voltage generation circuit and a control signal generation circuit. The common-mode voltage generation circuit is used for generating a common-mode voltage. The control signal generation circuit is used for generating an upper bridge switch control signal and a lower bridge switch control signal according to a compensation voltage corresponding to an output voltage of the LLC resonant converter, a sensing voltage corresponding to an input voltage of the LLC resonant converter, and the common-mode voltage, wherein the upper bridge switch control signal and the lower bridge switch control signal control an upper bridge switch and a lower bridge switch of the primary side of the LLC resonant converter, respectively.

公开(公告)号：US20210359614A1

公开(公告)日：2021-11-18

申请号：US17100968

申请日：2020-11-23

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Yao-Tsung Chen

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

Abstract: Asymmetric power converter includes an upper bridge switch, a lower bridge switch, a primary winding, a first secondary winding, a second secondary winding, a control circuit. The first secondary winding and the second secondary winding output a first output voltage and a second output voltage of a secondary side of the asymmetric power converter respectively, and voltage polarity of the first secondary winding is different from voltage polarity of the second secondary winding. The control circuit controls the lower bridge switch and the upper bridge switch according to the first output voltage and the second output voltage, respectively.

公开(公告)号：US10199948B2

公开(公告)日：2019-02-05

申请号：US15965996

申请日：2018-04-30

Applicant: Leadtrend Technology Corp.

Inventor： Yao-Tsung Chen ,  Mao-Shih Li ,  San-Yi Li ,  Hung-Ching Lee

IPC: H02M3/335

Abstract: A secondary controller applied to a secondary side of a power converter includes a detector and a standby signal generation circuit. The detector is used for detecting a first signal and a second signal of a universal serial bus device, and a frequency of a synchronization signal corresponding to a primary side of the power converter. The standby signal generation circuit is coupled to the detector for delaying a first predetermined time to generate a standby signal to a primary controller of the primary side of the power converter when the detector fails to detect the first signal and the second signal, and the frequency of the synchronization signal is less than a first predetermined frequency, wherein the primary controller enters a standby mode according to the standby signal.