公开(公告)号：WO2013182249A1

公开(公告)日：2013-12-12

申请号：PCT/EP2012/060892

申请日：2012-06-08

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  KARLSSON, Magnus ,  PERSSON, Oscar

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar

IPC: H02M3/337

CPC classification number: H02M3/33546 ,  G05F1/10 ,  H02M3/3376 ,  H02M3/3378 ,  H02M2001/0022 ,  H02M2001/0025

Abstract: A control circuit operable to generate a control signal (D) to control the duty cycle of a switched mode power supply (100), The control circuit comprises an. input terminal (205) for receiving a signal indicative of an input voltage (V ln ) of the switched mode power supply (100), and a reference signal generator (210) operable to generate, in dependence upon the received signal, a reference signal (V R ) that is a function of the input voltage (V ln ). The control circuit further comprises an error signal generator (230) arranged to receive a signal indicative of an output voltage (V out ) of the switched mode power supply (100) and operable to generate an error signal (V E ) based on the reference signal (V R ) and based on the output voltage (V out ). The control circuit also includes a low pass filter (225) connected between the input terminal (205) and the error signal generator (230), in series with the reference signal generator (210), and a duty cycle control signal generator (250) operable to generate the control signal (D) to control the duty cycle of the switched mode power supply (100) in dependence upon the error signal (V E ).

Abstract translation: 控制电路，其可操作以产生控制开关模式电源（100）的占空比的控制信号（D）。 输入端子（205），用于接收指示开关模式电源（100）的输入电压（Vln）的信号;以及参考信号发生器（210），其可操作以根据接收到的信号产生参考信号 VR），其是输入电压（Vln）的函数。 控制电路还包括误差信号发生器（230），其被布置为接收指示开关模式电源（100）的输出电压（Vout）的信号，并且可操作以基于参考信号（VE）产生误差信号（VE） VR）并基于输出电压（Vout）。 控制电路还包括与参考信号发生器（210）串联连接在输入端（205）和误差信号发生器（230）之间的低通滤波器（225）和占空比控制信号发生器（250） 可操作以产生控制信号（D），以根据误差信号（VE）来控制开关模式电源（100）的占空比。

公开(公告)号：WO2013117226A1

公开(公告)日：2013-08-15

申请号：PCT/EP2012/052186

申请日：2012-02-09

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  KARLSSON, Magnus ,  APPELBERG, Mikael ,  PERSSON, Oscar

Inventor： KARLSSON, Magnus ,  APPELBERG, Mikael ,  PERSSON, Oscar

IPC: H02M1/40

CPC classification number: H02M1/40 ,  H02M3/33538 ,  H02M3/33592 ,  H02M3/3378 ,  Y02B70/1475

Abstract: A control circuit (200) generates a control signal (D) to control the duty cycle of a switched mode power supply (100) such that the magnetic flux density in the transformer is balanced, thereby preventing saturation of the transformer core. This permits the use of unsymmetrical duty cycles within the switch cycle resulting in an improved load transient response. The control circuit (200) comprises a flux density calculator (201) and a regulator (202). The flux density regulator receives a signal indicative of the input voltage of the switched mode power supply and a feedback signal comprising the generated control signal, and it generates therefrom an average flux density signal. The regulator receives the generated average flux density signal and a signal indicative of the output voltage of the switched mode power supply, and generates the control signal in dependence upon the average flux density signal, the reference flux density signal, the signal indicative of the output voltage and a reference voltage signal.

Abstract translation: 控制电路（200）产生控制信号（D），以控制开关模式电源（100）的占空比，使得变压器中的磁通密度平衡，从而防止变压器磁芯的饱和。 这允许在开关周期内使用不对称占空比，导致改善的负载瞬态响应。 控制电路（200）包括磁通密度计算器（201）和调节器（202）。 通量密度调节器接收指示开关模式电源的输入电压的信号和包括所生成的控制信号的反馈信号，并且由此产生平均磁通密度信号。 调节器接收所生成的平均通量密度信号和指示开关模式电源的输出电压的信号，并根据平均通量密度信号，参考通量密度信号，表示输出的信号产生控制信号 电压和参考电压信号。

公开(公告)号：WO2014094841A1

公开(公告)日：2014-06-26

申请号：PCT/EP2012/076119

申请日：2012-12-19

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： PERSSON, Oscar ,  KARLSSON, Magnus

IPC: H01F27/28 ,  H01F27/32

CPC classification number: H01F27/2804 ,  H01F27/323 ,  H01F41/041 ,  Y10T29/4902

Abstract: Embodiments provide a multi- layered printed circuit board, PCB, for providing first windings for a first side of a planar magnetic transformer and second windings for a second side of the planar magnetic transformer, the PCB comprising; a plurality of conductive layers configured to provide the first windings,- a plurality of conductive layers configured' to provide the second windings; and a plurality of layers of an isolation material; wherein, each layer of isolation material is arranged between two conductive layers so as to provide electrical isolation between said two conductive layers; and a group of two or more adjacent conductive layers are all conductive layers of the first windings and are all arranged between two conductive layers of the second windings, wherein the thickness of the isolation material between the group of adjacent conductive layers of the first windings is less than ^ the thickness of the isolation material between a conductive layer of the second windings and a conductive layer of the first windings. Advantageously, a PCB with a lower height than realisable with known fully interleaved planar magnetic transformer designs is provided. The reduced height improves the thermal conductivity of the PCB, the flux leakage is reduced and good magnetic coupling between the primary and secondary sides is maintained.

Abstract translation: 实施例提供一种多层印刷电路板，PCB，用于为平面磁变压器的第一侧提供第一绕组和用于平面磁变压器第二侧的第二绕组，PCB包括： 多个导电层，被配置为提供所述第一绕组;多个导电层，被配置为提供所述第二绕组; 和多层隔离材料; 其中，隔离材料层分布在两个导电层之间，以便在所述两个导电层之间提供电绝缘; 并且一组两个或更多个相邻的导电层都是第一绕组的导电层，并且都布置在第二绕组的两个导电层之间，其中第一绕组的相邻导电层组之间的隔离材料的厚度为 小于第二绕组的导电层与第一绕组的导电层之间的隔离材料的厚度。 有利地，提供具有低于可实现的已知完全交错的平面磁变压器设计的高度的PCB。 降低的高度提高了PCB的导热性，磁通泄漏减小，并保持了主侧和次侧之间良好的磁耦合。

公开(公告)号：WO2015174899A1

公开(公告)日：2015-11-19

申请号：PCT/SE2014/050592

申请日：2014-05-15

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar

IPC: H02M3/335

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/33523

Abstract: A switched mode power supply comprises a switched mode converter (12) and a controller for controlling the switched mode converter, wherein the switched mode converter is provided for converting an input voltage (V in ) to an output voltage (V out ) and includes, on a primary side, a primary winding (X 1 ) and a controllable switch based circuitry (31) connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (X 2 ) coupled to the primary winding, and a capacitive element (C) connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion (n p1 ) and at least one further winding portion (n p2 ); and the switch based circuitry comprises controllable switches (Q 11 , Q 41 , Q 12 , Q 42 , Q 21 , Q 31 ) capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios (n 1 , n 2 ).

Abstract translation: 开关模式电源包括开关模式转换器（12）和用于控制开关模式转换器的控制器，其中提供开关模式转换器用于将输入电压（Vin）转换为输出电压（Vout），并且包括在 初级侧，初级绕组（X1）和连接初级绕组上的输入电压的基于可控开关的电路（31）; 并且在次级侧，耦合到初级绕组的次级绕组（X2）和连接在次级绕组上的电容元件（C），其中输出电压被获得作为电容元件上的电压。 初级绕组包括第一绕组部分（np1）和至少一个另外的绕组部分（np2）; 并且基于开关的电路包括能够在仅在第一绕组部分连接输入电压的第一操作状态和至少第二操作状态之间进行切换的可控开关（Q11，Q41，Q12，Q42，Q21，Q31） 输入电压连接在第一和至少一个其它绕组部分上，由此能够在两个不同变压器比（n1，n2）之间进行切换。

公开(公告)号：WO2015078489A1

公开(公告)日：2015-06-04

申请号：PCT/EP2013/074775

申请日：2013-11-26

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33507 ,  H02M3/33576 ,  H02M2001/0035 ,  Y02B70/16

Abstract: The present invention relates to a control circuit for a switched mode power supply (101), and to a related method for controlling the switching elements (201, 202) in a power train of a switched mode power supply. The control circuit comprises a mode controller (107) being configured to monitor the output current (lout) to determine whether the output current exceeds a current threshold. The mode controller is configured to control the switching controller (105) to generate the switch control signals such that, when the current exceeds the current threshold, the power train operates in a continuous conduction mode, and upon determining that the output current has fallen to or below the current threshold the operation of the power train is changed from the continuous conduction mode to a pulse skipping mode such that the pulse skipping mode is entered from the continuous conduction mode, wherein the pulse skipping mode involves determining the amount of energy stored in a secondary circuit (204) of the power train. The secondary circuit being operatively connected to the output terminal, and when the amount of energy stored in the secondary circuit has fallen to or below an energy threshold the mode controller instructs the switching controller to enable energy transfer from the primary circuit to the secondary circuit by means of the switch control signals, when the amount of energy stored in the secondary circuit exceeds said energy threshold the energy transfer from the primary circuit to the secondary circuit is disabled by means of the switch control signals.

Abstract translation: 本发明涉及一种用于开关式电源（101）的控制电路，以及一种用于控制开关模式电源的动力传动系中的开关元件（201,202）的相关方法。 控制电路包括模式控制器（107），其被配置为监视输出电流（lout）以确定输出电流是否超过电流阈值。 模式控制器被配置为控制开关控制器（105）以产生开关控制信号，使得当电流超过电流阈值时，动力传动系统以连续传导模式运行，并且在确定输出电流已经下降到 或低于当前阈值，则动力传动系的操作从连续传导模式改变为脉冲跳过模式，使得脉冲跳跃模式从连续传导模式进入，其中脉冲跳跃模式包括确定存储在 传动系的二次回路（204）。 次级电路可操作地连接到输出端子，并且当存储在次级电路中的能量的量已经降到或低于能量阈值时，模式控制器指示开关控制器使得能够从初级电路到次级电路的能量传递由 开关控制信号的装置，当存储在次级电路中的能量的量超过所述能量阈值时，通过开关控制信号禁用从初级电路到次级电路的能量传递。

公开(公告)号：WO2014075710A1

公开(公告)日：2014-05-22

申请号：PCT/EP2012/072521

申请日：2012-11-13

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： PERSSON, Oscar ,  ETSARE, Martin ,  FERM, Per ,  KARLSSON, Magnus ,  PEREZ-URIA, Igor

IPC: H01F27/26 ,  H01F27/28 ,  H01F27/30

CPC classification number: H01F27/306 ,  H01F27/263 ,  H01F27/2804 ,  H01F2027/2819

Abstract: A core for a planar magnetic component on a printed circuit board, the core comprising a first wing, a second wing, a centre pin and a base. The first wing, second wing and centre pin all protrude from the same face of the base. The base has a straight edge between a first end of the base and a second end of the base. The first wing has a straight edge and the first wing is arranged at the first end of the base with said straight edge of the first wing aligned along said straight edge of the base. The second wing has a straight edge and the second wing is arranged at the second end of the base with said straight edge of the second wing aligned along said straight edge of the base. The centre pin is positioned on said face of the base such that there is a gap on said face of the base between said straight edge of the base and the closest part of the centre pin to said straight edge of the base. Advantageously, the core may be positioned along a straight edge of a printed circuit board, PCB, and this allows the available space on the PCB to be used more efficiently and it is easier to connect a planar magnetic component using the core to other components. Applications include switch mode power supplies and any other devices that use planar magnetic components.

Abstract translation: 一种用于印刷电路板上的平面磁性部件的芯，所述芯包括第一翼，第二翼，中心销和基座。 第一翼，第二翼和中心针都从基座的同一个面突出。 底座在底座的第一端和底座的第二端之间具有直的边缘。 第一翼具有直的边缘，并且第一翼被布置在基部的第一端，所述第一翼的所述直边沿基座的所述直边对准。 第二翼具有直的边缘，并且第二翼被布置在基部的第二端，所述第二翼的所述直边沿基座的所述直边对齐。 中心销定位在基座的所述面上，使得在基部的所述直线边缘和中心销的最接近部分的基部的所述表面之间存在间隙到基部的所述直边缘。 有利地，芯可以沿着印刷电路板，PCB的直边缘定位，并且这允许更有效地使用PCB上的可用空间，并且更容易将使用芯的平面磁性部件连接到其它部件。 应用包括开关模式电源和任何其他使用平面磁性元件的设备。

公开(公告)号：WO2014008948A1

公开(公告)日：2014-01-16

申请号：PCT/EP2012/063817

申请日：2012-07-13

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  KARLSSON, Magnus ,  PERSSON, Oscar

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar

IPC: H02M3/335

CPC classification number: H02M3/33546 ,  H02M3/157 ,  H02M3/158 ,  H02M3/335 ,  H02M3/33592 ,  H02M3/3376 ,  H02M2001/0032 ,  Y02B70/1475 ,  Y02B70/16

Abstract: A control circuit (210) operable to control the switching of switching elements in a switched mode power supply (200). The control circuit (210) comprises a switching control signal generator (220) operable to generate control signals for switching the switching elements such that the switched mode power supply converts an input voltage (V in) to an output voltage (V out ). The control circuit (210) further comprises an operation mode setting module (260) which is operable to receive a signal (I) indicative of a current flowing to a load that is connected to an output of the switched mode power supply, and operable to cause the switching control signal generator (220) to generate the control signals so as to operate the switched mode power supply (200) in a continuous conduction mode or a pulse skipping mode in dependence upon the current. In the pulse skipping mode, the switching elements are turned OFF for at least one switching period of the switched mode power supply (200) but the switched mode power supply continues to supply power to the load. The operation mode setting module (260) is operable to monitor the signal (I) to determine whether the current exceeds a threshold, and is operable to control the switching control signal generator (220) to generate the control signals such that, when the current exceeds the threshold, the switched mode power supply (200) operates in the continuous conduction mode and, upon determining that the current has fallen to or below the threshold, operation of the switched mode power supply (200) is changed from the continuous conduction mode to the pulse skipping mode so that the pulse skipping mode is entered from the continuous conduction mode.

Abstract translation: 控制电路（210），其可操作以控制开关模式电源（200）中的开关元件的切换。 控制电路（210）包括开关控制信号发生器（220），其可操作以产生用于切换开关元件的控制信号，使得开关模式电源将输入电压（Vin）转换为输出电压（Vout）。 控制电路（210）还包括操作模式设置模块（260），操作模式设置模块（260），其可操作以接收指示流向连接到开关模式电源的输出的负载的电流的信号（I） 使得开关控制信号发生器（220）产生控制信号，以便根据电流在连续导通模式或脉冲跳跃模式下操作开关模式电源（200）。 在脉冲跳跃模式中，开关元件在开关模式电源（200）的至少一个开关周期中断开，但开关模式电源继续向负载供电。 操作模式设置模块（260）可操作以监视信号（I）以确定电流是否超过阈值，并且可操作以控制开关控制信号发生器（220）产生控制信号，使得当电流 开关模式电源（200）工作在连续导通模式，并且在确定电流已经下降到或低于阈值之后，开关模式电源（200）的操作从连续导通模式 到脉冲跳跃模式，使得从连续导通模式进入脉冲跳跃模式。

公开(公告)号：WO2013129983A1

公开(公告)日：2013-09-06

申请号：PCT/SE2012/050235

申请日：2012-03-01

Applicant: Telefonaktiebolaget L M Ericsson (publ) ,  KARLSSON, Magnus ,  PERSSON, Oscar

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar

IPC: H02M1/36 ,  G06F1/26 ,  H02J1/10 ,  H02J3/46

CPC classification number: H02M3/156 ,  G05F1/565 ,  G06F1/305

Abstract: The present disclosure relates to methods, systems and a module for operating a power converter module (1), the power converter module (1) comprises a voltage source (2),a remote control terminal (3) configured to be connected to a voltage potential(4) for remote control of the power converter module (1). The power converter module further comprises an output terminal (5) for output of an output voltage,a voltage converter (6) operatively connected to said output terminal and to said remote control terminal. The voltage converter is configured to send an alarm signal,determine the voltage potential of the remote control terminal, and control the output voltage of the voltage converter at the output terminal of the power converter module based on the determined voltage potential of the remote control terminal. The power converter module further comprises an alarm branch (7) comprising a bias terminal (8) operatively connected to said voltage source (2), an alarm terminal (9) operatively connected to said voltage converter for receiving said alarm signal, and a control terminal (10) operatively connected to said remote control terminal. The alarm branch is configured to change the voltage potential of the remote control terminal by means of said voltage source in response to an alarm signal from the voltage converter when said remote control terminal is connected to a voltage potential, thereby causing the voltage converter to control the output voltage at the output terminal.

Abstract translation: 本公开涉及用于操作功率转换器模块（1）的方法，系统和模块，所述功率转换器模块（1）包括电压源（2），远程控制端子（3），被配置为连接到电压 用于远程控制功率转换器模块（1）的电位（4）。 功率转换器模块还包括用于输出输出电压的输出端子（5），可操作地连接到所述输出端子和所述远程控制端子的电压转换器（6）。 电压转换器被配置为发送警报信号，确定遥控终端的电压电位，并且基于所确定的遥控终端的电压电位来控制电力转换器模块的输出端子处的电压转换器的输出电压 。 功率转换器模块还包括报警支路（7），其包括可操作地连接到所述电压源（2）的偏置端子（8），与所述电压转换器可操作地连接以接收所述报警信号的报警端子（9） 终端（10）可操作地连接到所述遥控终端。 报警分支被配置为当所述遥控终端连接到电压电位时响应于来自电压转换器的报警信号，借助于所述电压源来改变遥控终端的电压电位，从而使电压转换器控制 输出端子的输出电压。

公开(公告)号：WO2016080870A1

公开(公告)日：2016-05-26

申请号：PCT/SE2014/051362

申请日：2014-11-17

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar ,  WAHLEDOW, Fredrik

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M3/335 ,  H02M3/33523 ,  H02M3/33553 ,  H02M2001/0022

Abstract: A switched mode power supply comprising a switched mode converter (12) and a controller (16) for controlling the switched mode converter, the switched mode converter being provided for converting an input voltage (V in ) to an output voltage (V out ) and including, on a primary side, a primary winding (X 1 ) and a controllable switch based circuitry (31) connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (X 2 ) coupled to the primary winding, and a capacitive element (C) connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element: The primary winding comprises a first winding portion (n p1 ) and at least one further winding portion (n p2 ); and the switch based circuitry comprises controllable switches (Q 11 , Q 4 , Q 12 , Q 42 ,Q 2 , Q 31 ) (i) capable of controlling the duty cycle of the switched mode converter and (ii) capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios (n 1 , n 2 ). The controller comprises a first control arrangement (51, 52) (i) connected to monitor the output voltage (V out ) of the switched mode converter and (ii) operatively connected to the controllable switches to control the controllable switches to switch to thereby control the duty cycle in response to the monitored output voltage and a reference voltage using PID feedback control; and a second control arrangement (16a) (i) connected to monitor the input voltage (V in ) of the switched mode converter and (ii) operatively connected to the controllable switches to control the controllable switches to switch between the first and the at least second operation states in response to the monitored input voltage.

Abstract translation: 一种开关模式电源，包括开关模式转换器（12）和用于控制开关模式转换器的控制器（16），所述开关模式转换器被提供用于将输入电压（Vin）转换为输出电压（Vout） 在初级侧，初级绕组（X1）和连接初级绕组上的输入电压的基于可控开关的电路（31）; 并且在次级侧，耦合到初级绕组的次级绕组（X2）和连接在次级绕组上的电容元件（C），其中输出电压被获得作为电容元件上的电压：初级绕组包括 第一绕组部分（np1）和至少一个另外的绕组部分（np2）; 并且基于开关的电路包括能够控制开关模式转换器的占空比的可控开关（Q11，Q4，Q12，Q42，Q2，Q31）（i）和（ii）能够在第一操作状态之间切换，其中输入 电压仅在第一绕组部分上连接，并且至少第二操作状态，其中输入电压连接在第一和至少一个其它绕组部分上，从而能够在两个不同变压器比（n1，n2）之间切换。 控制器包括连接到监视开关模式转换器的输出电压（Vout）的第一控制装置（i）和（ii）可操作地连接到可控开关，以控制可控开关切换从而控制 响应于监控的输出电压和使用PID反馈控制的参考电压的占空比; 以及第二控制装置（16a）（i），其连接以监视开关模式转换器的输入电压（Vin），和（ii）可操作地连接到可控开关，以控制可控开关在第一和至少第二 响应于监测的输入电压的操作状态。

公开(公告)号：WO2015195012A1

公开(公告)日：2015-12-23

申请号：PCT/SE2014/050757

申请日：2014-06-18

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： KARLSSON, Magnus ,  PERSSON, Oscar ,  WAHLEDOW, Fredrik

IPC: H02M3/335 ,  H02M3/337

CPC classification number: H02M3/33507 ,  H02M1/08 ,  H02M3/33569 ,  H02M3/337 ,  H02M2001/0022

Abstract: A switched mode power supply comprises a switched mode converter (12) and a controller for controlling the switched mode converter, wherein the switched mode converter is provided for converting an input voltage (V in ) to an output voltage (V out ) and includes, on a primary side, a primary winding (X 1 ) and a controllable switch based circuitry (31) connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (X 2 ) coupled to the primary winding, and a capacitive element (C) connected over the secondary winding, wherein the output voltage is obtained as the voltage over the capacitive element. The primary winding comprises a first winding portion (n P1 ) and at least one further winding portion (np2); and the switch based circuitry comprises controllable switches (Q 11 , Q 41 , Q 12 , Q 42 , Q 21 , Q 31 ) capable of switching between a first operation state wherein the input voltage is connected only over the first winding portion and at least a second operation state wherein the input voltage is connected over the first and the at least one further winding portions, thereby enabling switching between two different transformer ratios (n 1 , n 2 ). The controller is (i) configured to monitor the output voltage of the switched mode converter and (ii) operatively connected to the controllable switches to control the controllable switches to switch between the first and the at least second operation states in response to the monitored output voltage.

Abstract translation: 开关模式电源包括开关模式转换器（12）和用于控制开关模式转换器的控制器，其中提供开关模式转换器用于将输入电压（Vin）转换为输出电压（Vout），并且包括在 初级侧，初级绕组（X1）和连接初级绕组上的输入电压的基于可控开关的电路（31）; 并且在次级侧，耦合到初级绕组的次级绕组（X2）和连接在次级绕组上的电容元件（C），其中输出电压被获得作为电容元件上的电压。 初级绕组包括第一绕组部分（nP1）和至少一个另外的绕组部分（np2）; 并且基于开关的电路包括能够在仅在第一绕组部分连接输入电压的第一操作状态和至少第二操作状态之间进行切换的可控开关（Q11，Q41，Q12，Q42，Q21，Q31） 输入电压连接在第一和至少一个其它绕组部分上，由此能够在两个不同变压器比（n1，n2）之间进行切换。 控制器是（i）被配置为监视开关模式转换器的输出电压，和（ii）可操作地连接到可控开关以控制可控开关响应于所监视的输出在第一操作状态和至少第二操作状态之间切换 电压。