公开(公告)号：US20220385190A1

公开(公告)日：2022-12-01

申请号：US17659655

申请日：2022-04-18

Applicant: Delta Electronics (Shanghai) Co.,Ltd.

Inventor： Hairui XU ,  Haibin SONG ,  Daofei XU ,  Jinfa ZHANG

IPC: H02M3/158 ,  G05F1/24

Abstract: The invention discloses a converter adaptable to a wide range output voltage and a control method thereof. The converter comprises a PWM half-bridge circuit. The control method comprises the steps of: controlling the PWM half-bridge circuit to enter into a discontinuous conduction mode by regulating a switching frequency; when the PWM half-bridge circuit is operated in the discontinuous conduction mode, oscillation occurs among the output inductor, a magnetizing inductor of the transformer and a parasitic capacitor of the PWM half-bridge circuit, and when a center point voltage of the primary switching bridge arm reaches a valley or a peak, turning on the corresponding power switch. The invention reduces switching loss by controlling the corresponding power switch in the PWM half-bridge circuit to turn on when a voltage across the power switch is oscillated to valley.

公开(公告)号：US20210313897A1

公开(公告)日：2021-10-07

申请号：US17212056

申请日：2021-03-25

Applicant: Delta Electronics (Shanghai) CO., LTD

Inventor： Jian ZHOU ,  Haibin SONG ,  Daofei XU ,  Jinfa ZHANG

IPC: H02M3/335 ,  H02M1/08

Abstract: A power adapter, includes: a transformer, including a primary winding and a secondary winding; a primary circuit, including a primary main switch, electrically coupled to the primary winding; a secondary circuit, including a first switch unit and a second switch unit; a first end of the first switch unit and a first end of the second switch unit are coupled to the secondary winding of the transformer, and a second end of the first switch unit and a second end of the second switch unit connected to a first output port and a second output port, respectively; a control circuit, configured to detect output voltages of the first output port and the second output port, and controlling the primary main switch, the first switch unit and the second switch unit to adjust the output voltages of the first output port and the second output port.

公开(公告)号：US20200014303A1

公开(公告)日：2020-01-09

申请号：US16455732

申请日：2019-06-27

Applicant: Delta Electronics (Shanghai) Co., Ltd.

Inventor： Haibin SONG ,  Daofei XU ,  Jinfa ZHANG

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

Abstract: The present invention discloses a method and an apparatus for controlling a flyback converter, the flyback converter including a main switch, a transformer and an auxiliary switch. The method includes: obtaining a first voltage signal and a second voltage signal, the first voltage signal representing an input voltage of the flyback converter, and the second voltage signal representing an output voltage of the flyback converter; controlling turn-on of the auxiliary switch, wherein the turn-on time period of the auxiliary switch is determined according to the first voltage signal and the second voltage signal; and turning on the main switch at ZVS condition, wherein the main switch is turned on at the time delayed for a duration of a dead time after turning off of the auxiliary switch.

公开(公告)号：US20190013633A1

公开(公告)日：2019-01-10

申请号：US16013922

申请日：2018-06-20

Applicant: Delta Electronics (Shanghai) Co.,Ltd.

Inventor： Xiaojun CHEN ,  Jinfa ZHANG ,  Daofei XU

IPC: H01R33/94 ,  H01R33/06

Abstract: The present invention discloses a power adapter and an electronic device comprising the same. The power adapter comprises a housing, which has a plurality of end faces. The power adapter further comprises a power inlet socket, which is provided on any of the plurality of end faces. The end face on which the power inlet socket is provided, at least another one of the plurality of end faces, and the power inlet socket are formed as one body integrally.

公开(公告)号：US20150280575A1

公开(公告)日：2015-10-01

申请号：US14518752

申请日：2014-10-20

Applicant: DELTA ELECTRONICS (SHANGHAI) CO., LTD.

Inventor： Haibin SONG ,  Yuanqiang GU ,  Jian ZHOU ,  Daofei XU

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/32 ,  H02M3/156 ,  H02M2001/0009 ,  H02M2001/0025 ,  Y02B70/1425 ,  Y02B70/1433

Abstract: The disclosure relates to a control device, a control method of a power converter and a switching power supply using the control device. The control device of the power converter includes: a first control unit, which is coupled to the power converter to detect an output voltage of the power converter and is configured to generate a first control signal based on the output voltage; a variable resistor unit, which is connected to an output terminal of the first control unit to receive the first control signal and is configured to generate a resistance value based on the first control signal; and a second control unit, which is connected to the variable resistor unit and is configured to output a second control signal in order to control operations of a switch unit of the power converter.

Abstract translation: 本公开涉及控制装置，电力转换器的控制方法和使用该控制装置的开关电源。 功率转换器的控制装置包括：第一控制单元，其耦合到功率转换器以检测功率转换器的输出电压，并且被配置为基于输出电压产生第一控制信号; 可变电阻器单元，其连接到第一控制单元的输出端以接收第一控制信号，并且被配置为基于第一控制信号产生电阻值; 以及第二控制单元，其连接到所述可变电阻器单元，并且被配置为输出第二控制信号，以便控制所述功率转换器的开关单元的操作。