公开(公告)号：US20180351470A1

公开(公告)日：2018-12-06

申请号：US16100467

申请日：2018-08-10

Applicant: ROHM CO., LTD.

Inventor： Hiroki KIKUCHI

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/32 ,  H02M7/21 ,  H02J1/10 ,  H02M3/156 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02J1/102 ,  H02M1/32 ,  H02M3/1563 ,  H02M3/3372 ,  H02M7/21 ,  H02M2001/0006 ,  Y02B70/1475

Abstract: A secondary controller drives a light emitting element of a photocoupler such that a detection voltage VOUTS corresponding to an output voltage VOUT generated in an output capacitor C approximates to a reference voltage VREF. A primary controller controls a switching transistor M according to a feedback signal VFB. A protection circuit is activated and drives the light emitting element of the photocoupler when detecting an abnormal state. An auxiliary power supply circuit includes a power supply capacitor C provided separately from the output capacitor C and supplies a power supply voltage VCC to the protection circuit and an anode of the light emitting element of the photocoupler.

公开(公告)号：US20180301996A1

公开(公告)日：2018-10-18

申请号：US16017922

申请日：2018-06-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kensuke TAKAHASHI ,  Takashi SAJI

IPC: H02M3/335 ,  H02M3/338 ,  H02M3/337 ,  H02M1/44

CPC classification number: H02M3/33546 ,  H02M1/44 ,  H02M3/33507 ,  H02M3/33515 ,  H02M3/33576 ,  H02M3/3372 ,  H02M3/3384

Abstract: A switching power supply apparatus includes a PFM control circuit that outputs a clock signal Set such that a switching frequency of a switching element varies in accordance with a load state. The clock signal Set determines a turn-on timing of the switching element. A reference value of a current flowing through the switching element determines a turn-off timing of the switching element. A modulation signal is applied to the turn-off timing of the switching element to modulate one of a peak value of a drain current flowing through the switching element and an on-time of the switching element. Input control is performed separately on the clock signal Set and the modulation signal. Accordingly, even when the clock signal Set and the modulation signal contribute to each other to offset each other, modulation effects are not cancelled.

公开(公告)号：US20170309713A1

公开(公告)日：2017-10-26

申请号：US15645043

申请日：2017-07-10

Applicant: Infineon Technologies Austria AG

Inventor： Franz Hirler ,  Oliver Blank ,  Ralf Siemieniec

IPC: H01L29/40 ,  H01L29/417 ,  H01L29/06 ,  H01L29/78

CPC classification number: H01L29/407 ,  H01L21/765 ,  H01L29/0623 ,  H01L29/0696 ,  H01L29/41758 ,  H01L29/41766 ,  H01L29/7396 ,  H01L29/7397 ,  H01L29/7806 ,  H01L29/7813 ,  H01L29/8613 ,  H01L29/872 ,  H02M3/1582 ,  H02M3/33592 ,  H02M3/3372 ,  H02M7/5387 ,  H02M2001/0058 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: A semiconductor device includes a pair of stripe-shaped gate structures formed lengthwise in parallel in a first surface of a semiconductor body and extending into the semiconductor body, each stripe-shaped gate structure including a gate electrode and a gate dielectric separating the gate electrode from the semiconductor body. The semiconductor device further includes a plurality of field electrode structures formed in the semiconductor body between the pair of stripe-shaped gate structures, a body zone of a second conductivity type formed in the semiconductor body and extending between the pair of stripe-shaped gate structures, and a source zone of a first conductivity type opposite the second conductivity type formed in the body zone. Each field electrode structure includes a spicular or needle-shaped field electrode and a field dielectric adjacent the field electrode. Each spicular or needle-shaped field electrode has a diameter of at most 500 nm.

公开(公告)号：US20170155327A1

公开(公告)日：2017-06-01

申请号：US15365554

申请日：2016-11-30

Applicant: DENSO CORPORATION

Inventor： Akira TOKUMASU ,  Hiroshi TAKI ,  Kazuhiro SHIRAKAWA

IPC: H02M3/337

CPC classification number: H02M3/3376 ,  H02M3/33584 ,  H02M3/33592 ,  H02M3/337 ,  H02M3/3372 ,  H02M2001/0054 ,  Y02B70/1491

Abstract: In a push-pull type DC/DC converter capable of operating primary side switching elements alternately, a switching operation section turns on a primary side switching element having a high priority after a mode (d) as a normal state is transferred to a mode (d) as an inverse state during a circulation period when a load current is circulated into the secondary side rectifier elements when all of the primary side switching elements are turned off. To turn on the primary side switching element having a high priority after occurrence of the state transition to the inverse state can reduce a voltage immediately after supplying of electric power to the primary side switching elements with using exciting current and without adding any additional component.

公开(公告)号：US09391532B2

公开(公告)日：2016-07-12

申请号：US13828794

申请日：2013-03-14

Applicant: Infineon Technologies AG

Inventor： Tomas Reiter ,  Sandra Zeljkovic

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/10

CPC classification number: H02M3/3376 ,  H02M1/10 ,  H02M3/337 ,  H02M3/3372

Abstract: In accordance with an embodiment, a power converter includes an H-bridge switching arrangement, a transformer having a primary winding coupled to an output of the H-bridge switching arrangement, a first switch coupled between a power input of the H-bridge switching arrangement and a first power supply node, and a second switch coupled between a center-tap of the primary winding of the transformer and a low impedance node.

Abstract translation: 根据实施例，功率转换器包括H桥开关装置，具有耦合到H桥开关装置的输出的初级绕组的变压器，耦合在H桥开关装置的功率输入端之间的第一开关 和第一电源节点，以及耦合在变压器的初级绕组的中心抽头和低阻抗节点之间的第二开关。

公开(公告)号：US20160190939A1

公开(公告)日：2016-06-30

申请号：US14854768

申请日：2015-09-15

Applicant: Joseph Pernyeszi

Inventor： Joseph Pernyeszi

IPC: H02M3/335 ,  H05B33/08

CPC classification number: H02M3/33507 ,  H02M3/158 ,  H02M3/3372 ,  H02M3/3376 ,  H02M2001/0058 ,  H05B33/0815 ,  Y02B70/1425 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: Push-pull circuits are described that are suitable for the driving of LEDs and that reduce the voltage stress on the switching transistors that is caused by the output transformer. The push-pull arrangement caters to reducing the size of the transformer as it eliminates the DC magnetic bias of the transformer core and it also caters to the integration of the semiconductor content of the circuit requiring only low side DMOS to be implemented in the monolithic, junction isolated process.

Abstract translation: 描述了适用于驱动LED并且降低由输出变压器引起的开关晶体管上的电压应力的推挽电路。 推拉装置可以减轻变压器的尺寸，因为它消除了变压器磁芯的直流磁偏置，并且还适用于仅需要低端DMOS的电路的半导体内容的集成，可以实现在单片， 连接隔离过程。

公开(公告)号：US09325249B2

公开(公告)日：2016-04-26

申请号：US13802311

申请日：2013-03-13

Applicant: Apple Inc.

Inventor： Bogdan T. Bucheru

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/42 ,  H02M1/00

CPC classification number: H02M3/3372 ,  H02M1/4258 ,  H02M2001/0058 ,  Y02B70/126 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: An AC/DC power converter utilizing a single stage boost-asymmetric LLC topology is disclosed. The converter uses a combined pulse width modulation (PWM) and frequency modulation (FM) to achieve dual control for a single main magnetic element (transformer). The transformer provides an output voltage regulation throughout the primary-secondary isolation operating in resonant mode (LLC) by means of frequency modulation, while at the same time its magnetizing inductance is conditioning the input current and providing a boosted high voltage for energy storage purpose by means of duty cycle control. A single pair of complementary primary switches is used to drive the primary winding of the transformer in order to achieve both voltage regulation and power conditioning. The secondary side capacitors and the resonant inductor, which may be either integrated into the transformer or external to the transformer, achieve the resonant function of the transformer.

Abstract translation: 公开了一种采用单级升压 - 非对称LLC拓扑的AC / DC功率转换器。 转换器使用组合脉宽调制（PWM）和频率调制（FM）来实现单个主磁元件（变压器）的双重控制。 变压器通过频率调制在谐振模式（LLC）中工作的整个次级隔离中提供输出电压调节，同时其磁化电感调节输入电流，并提供用于储能的升压高电压 占空比控制手段 一对互补的初级开关用于驱动变压器的初级绕组，以实现电压调节和功率调节。 可以将二次侧电容器和谐振电感器集成到变压器中或外部变压器，实现变压器的谐振功能。

公开(公告)号：US09252677B2

公开(公告)日：2016-02-02

申请号：US13982207

申请日：2012-01-21

Applicant: Zhifeng He ,  Yucheng Yang

Inventor： Zhifeng He ,  Yucheng Yang

IPC: H02M3/335 ,  H02M3/337 ,  H02M1/00

CPC classification number: H02M3/3376 ,  H02M3/3372 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: The invention relates to a quasi-resonant push-pull converter and the method for controlling the same, said push-pull converter comprising: a direct current (DC) input power supply configured to supply DC input for the converter; a first power input unit and a second power input unit, connected to said DC input power supply, respectively and configured to supply input for the converter in different periods, comprising a first power switching tube and a second power switching tube, a first primary winding and a second primary winding; a power output circuit, configured to supply output of the converter, comprising secondary windings and full-bridge rectification circuits; a first output capacitor and a second output capacitor connected to said power output circuit and configured to store DC electric energy output by the power output circuit in which a resonant element is arranged to achieve a quasi-resonant switching circuit through voltage feedback; and a switching circuit being controlled through voltage feedback, whereby turns ratio of the primary windings and the secondary windings of the push-pull converter is controlled.

Abstract translation: 本发明涉及一种准谐振推挽转换器及其控制方法，所述推挽转换器包括：直流（DC）输入电源，被配置为提供转换器的直流输入; 第一电力输入单元和第二电力输入单元，分别连接到所述DC输入电源，并被配置为在不同的周期内为所述转换器提供输入，包括第一功率开关管和第二功率开关管，第一初级绕组 和第二初级绕组; 功率输出电路，被配置为提供转换器的输出，包括次级绕组和全桥整流电路; 连接到所述电力输出电路的第一输出电容器和第二输出电容器，并且被配置为存储其中布置有谐振元件以通过电压反馈实现准谐振开关电路的功率输出电路输出的DC电能; 并且通过电压反馈来控制开关电路，从而控制推挽转换器的初级绕组和次级绕组的匝数比。

公开(公告)号：US20150333634A1

公开(公告)日：2015-11-19

申请号：US14654514

申请日：2013-09-26

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： KOJI YOSHIDA ,  SATOSHI MORIGUCHI ,  DAMRI RADENAMAD ,  LAKSAMEE TIPPAYAWAT ,  KOJI AKIMASA

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M3/28 ,  H02M3/3353 ,  H02M3/33576 ,  H02M3/33584 ,  H02M3/3372 ,  H02M2001/0058 ,  H02M2003/1552 ,  Y02B70/1433 ,  Y02B70/1491

Abstract: A DC to DC converter includes: first and second switching elements connected at a first connection point between a first input/output terminal and a first ground terminal; third and fourth switching elements connected at a second connection point between the first input/output terminal and the first ground terminal; a resonant capacitor and a resonant inductor connected in series between the first and second connection points; fifth and sixth switching elements connected at a third connection point between a second input/output terminal and a second ground terminal; seventh and eighth switching elements connected at a fourth connection point between the second input/output terminal and the second ground terminal; a transformer; and a control circuit. The control circuit is operable to adjust the pulse waveforms for switching the fifth to eighth switching elements when voltage at the second input/output terminal is stepped down and output from the first input/output terminal.

Abstract translation: DC-DC转换器包括：在第一输入/输出端子和第一接地端子之间的第一连接点处连接的第一和第二开关元件; 第三和第四开关元件，连接在第一输入/输出端子和第一接地端子之间的第二连接点处; 在第一和第二连接点之间串联连接的谐振电容器和谐振电感器; 第五和第六开关元件连接在第二输入/输出端子和第二接地端子之间的第三连接点处; 第七和第八开关元件连接在第二输入/输出端子和第二接地端子之间的第四连接点处; 变压器 和控制电路。 当第二输入/输出端的电压降低并从第一输入/输出端输出时，控制电路可操作用于调节用于切换第五至第八开关元件的脉冲波形。

公开(公告)号：US09088220B2

公开(公告)日：2015-07-21

申请号：US13787317

申请日：2013-03-06

Applicant: Kyle Van Bavel

Inventor： Kyle Van Bavel

IPC: H02M3/335 ,  H02M3/337

CPC classification number: H02M3/33507 ,  H02M3/3372

Abstract: An apparatus for generating an isolated power supply voltage and an isolated data signal includes a first pulse generation circuit configured to generate a first pulse signal and a second pulse generation circuit configured to generate a second pulse signal based on an input pulse width modulation (PWM) signal. A transformer circuit including a transformer is coupled to the first pulse generation circuit and to the second pulse generation circuit. The transformer is configured to generate an output pulse signal based on the first pulse signal and the second pulse signal. An isolated power supply circuit is coupled to the transformer circuit and is configured to generate an isolated power supply voltage based on the output pulse signal. A latch circuit is coupled to the transformer circuit and is configured to generate an isolated PWM signal based on the output pulse signal.

Abstract translation: 一种用于产生隔离电源电压和隔离数据信号的装置包括：第一脉冲发生电路，被配置为产生第一脉冲信号;以及第二脉冲发生电路，被配置为基于输入脉宽调制（PWM）产生第二脉冲信号， 信号。 包括变压器的变压器电路耦合到第一脉冲发生电路和第二脉冲发生电路。 变压器被配置为基于第一脉冲信号和第二脉冲信号产生输出脉冲信号。 隔离电源电路耦合到变压器电路，并且被配置为基于输出脉冲信号产生隔离的电源电压。 锁存电路耦合到变压器电路，并被配置为基于输出脉冲信号产生隔离的PWM信号。