公开(公告)号：US20180323718A1

公开(公告)日：2018-11-08

申请号：US16036863

申请日：2018-07-16

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Chih-Chi Chang

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33523 ,  H02M3/33507 ,  H02M2001/0032 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.

公开(公告)号：US09755421B2

公开(公告)日：2017-09-05

申请号：US14599554

申请日：2015-01-19

Applicant: Leadtrend Technology Corp.

Inventor： Chih-Chi Chang ,  Da-Chun Wei ,  Ming-Chang Tsou ,  Meng-Jen Tsai

IPC: H02H7/10 ,  H02H3/20 ,  H02H5/04 ,  H02H7/12

CPC classification number: H02H5/042 ,  H02H3/20 ,  H02H7/1213

Abstract: A control circuit applied to a power converter includes a multi-functional pin, a zero-crossing signal generator, and an over-voltage detector. The multi-functional pin is used for receiving an auxiliary current generated by an auxiliary winding of the power converter, and an input current. The zero-crossing signal generator is used for generating a zero-crossing signal according to the auxiliary current. The over-voltage detector is used for generating an over-voltage signal according to the auxiliary current. The control circuit generates a switch control signal to the power switch according to the zero-crossing signal, or generates an over-voltage protection signal to the power switch according to the over-voltage 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：US09641086B2

公开(公告)日：2017-05-02

申请号：US14824100

申请日：2015-08-12

Applicant: Leadtrend Technology Corp.

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

IPC: H02M3/33 ,  H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M2001/0025 ,  H02M2001/0048 ,  Y02B70/1491

Abstract: An oscillator applied to a control circuit of a power converter includes a compensation module and an oscillation module. The compensation module outputs or sinks an adjustment current according to a compensation voltage corresponding to a load, a direct current voltage of a primary side of the power converter, and a reference voltage. The oscillation module outputs a clock signal according to the compensation voltage, a control voltage, and the adjustment current. The control circuit generates a gate control signal to a power switch of the primary side according to the clock signal. When the compensation voltage is less than a first predetermined voltage, a frequency of the gate control signal is a first fixed value, and when the compensation voltage is between the first predetermined voltage and a second predetermined voltage and greater than the second predetermined voltage, the frequency is varied with the compensation voltage.

公开(公告)号：US10361635B2

公开(公告)日：2019-07-23

申请号：US16036863

申请日：2018-07-16

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Chih-Chi Chang

IPC: H02M3/335 ,  H02M1/00

Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.

公开(公告)号：US20170201182A1

公开(公告)日：2017-07-13

申请号：US15397746

申请日：2017-01-04

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Chih-Chi Chang

IPC: H02M3/335

CPC classification number: H02M3/33523 ,  H02M3/33507 ,  H02M2001/0032 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.

公开(公告)号：US20140211511A1

公开(公告)日：2014-07-31

申请号：US14164238

申请日：2014-01-26

Applicant: Leadtrend Technology Corp.

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

IPC: H02M3/24

CPC classification number: H02M3/33523 ,  H02H7/1227 ,  H02M1/32 ,  H02M2001/0009 ,  H02M2001/0019

Abstract: A device for detecting an average output current of a power converter includes a current generation unit, a first voltage generation unit, a first current mirror unit, and a second current mirror unit. The current generation unit generates a first charge current according to an intermediate voltage. The first voltage generation unit generates a first node voltage according to the first charge current, a first discharge current, a turning-on time, and an inverse turning-on time. The first current mirror unit generates a first current according to the first node voltage, and generates a second voltage corresponding to the average output current of a secondary side of the power converter according to the first current. The second current mirror unit generates the first discharge current according to the first current.

Abstract translation: 用于检测功率转换器的平均输出电流的装置包括电流产生单元，第一电压产生单元，第一电流镜单元和第二电流镜单元。 电流产生单元根据中间电压产生第一充电电流。 第一电压产生单元根据第一充电电流，第一放电电流，接通时间和反向接通时间产生第一节点电压。 第一电流镜单元根据第一节点电压产生第一电流，并且根据第一电流产生与功率转换器的次级侧的平均输出电流相对应的第二电压。 第二电流镜单元根据第一电流产生第一放电电流。

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：US10186973B2

公开(公告)日：2019-01-22

申请号：US15397746

申请日：2017-01-04

Applicant: Leadtrend Technology Corp.

Inventor： Ming-Chang Tsou ,  Chih-Chi Chang

IPC: H02M3/335 ,  H02M1/00

Abstract: A multi-mode controller applied to a power converter includes a detection range generation module and a gate signal generation unit. The detection range generation module is used for generating a comparison voltage according to a reference current, and generating a detection signal according to the comparison voltage and a first reference voltage. When the detection signal is disabled by a zero-crossing signal, the gate signal generation unit generates a gate control signal corresponding to a quasi-resonant mode of the power converter according to the zero-crossing signal; and when the detection signal is disabled by a continuous-conduction mode signal generated by the detection range generation module according to the comparison voltage and a second reference voltage, the gate signal generation unit generates the gate control signal corresponding to a continuous-conduction mode of the power converter according to the continuous-conduction mode signal.

公开(公告)号：US09331590B2

公开(公告)日：2016-05-03

申请号：US14164238

申请日：2014-01-26

Applicant: Leadtrend Technology Corp.

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

IPC: H02M1/08 ,  H02M3/335 ,  H02M1/32 ,  H02M1/00 ,  H02H7/122

CPC classification number: H02M3/33523 ,  H02H7/1227 ,  H02M1/32 ,  H02M2001/0009 ,  H02M2001/0019

Abstract: A device for detecting an average output current of a power converter includes a current generation unit, a first voltage generation unit, a first current mirror unit, and a second current mirror unit. The current generation unit generates a first charge current according to an intermediate voltage. The first voltage generation unit generates a first node voltage according to the first charge current, a first discharge current, a turning-on time, and an inverse turning-on time. The first current mirror unit generates a first current according to the first node voltage, and generates a second voltage corresponding to the average output current of a secondary side of the power converter according to the first current. The second current mirror unit generates the first discharge current according to the first current.

Abstract translation: 用于检测功率转换器的平均输出电流的装置包括电流产生单元，第一电压产生单元，第一电流镜单元和第二电流镜单元。 电流产生单元根据中间电压产生第一充电电流。 第一电压产生单元根据第一充电电流，第一放电电流，接通时间和反向接通时间产生第一节点电压。 第一电流镜单元根据第一节点电压产生第一电流，并且根据第一电流产生与功率转换器的次级侧的平均输出电流相对应的第二电压。 第二电流镜单元根据第一电流产生第一放电电流。