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1. 发明申请

US20160261192A1 Switched Mode Power Supply and Method of Operating a Switched Mode Power Supply 有权
标题翻译：开关电源和操作开关电源的方法
公开(公告)号：US20160261192A1
公开(公告)日：2016-09-08
申请号：US14430933
申请日：2014-05-15
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Magnus Karlsson , Oscar Persson
IPC分类号： H02M3/335 , H02M1/08
CPC分类号： H02M3/33507 , H02M1/08 , H02M3/33523
摘要： 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 (Vin) to an output voltage (Vout) and includes, on a primary side, a primary winding (X1) and a controllable switch based circuitry (31) connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (X2) 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 (np1) and at least one further winding portion (np2); and the switch based circuitry comprises controllable switches (Q11, Q41, Q12, Q42, Q21, Q31) 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 (n1, n2).
摘要翻译：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。

2. 发明申请

US20150349646A1 A Control Circuit and a Method for an Energy Based Pulse Skipping Mode in a DC/DC Converter 有权
标题翻译：一种用于DC / DC转换器中的基于能量的脉冲跳跃模式的控制电路和方法
公开(公告)号：US20150349646A1
公开(公告)日：2015-12-03
申请号：US14396895
申请日：2013-11-26
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Magnus Karlsson , Oscar Persson
IPC分类号： H02M3/335
CPC分类号： H02M3/33507 , H02M3/33576 , H02M2001/0035 , Y02B70/16
摘要： A control circuit for a switched mode power supply and a related method are provided for controlling switching elements in a power train of a switched mode power supply. The control circuit comprises a mode controller to monitor the output current to determine whether the output current exceeds a current threshold. The mode controller controls the switching controller to generate the switch control signals. When the current exceeds the current threshold, the power train operates in a continuous conduction mode, and when 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. The pulse skipping mode is entered from the continuous conduction mode and involves determining the amount of energy stored in a secondary circuit of the power train.
摘要翻译：提供了一种用于开关模式电源的控制电路和相关方法，用于控制开关模式电源的传动系中的开关元件。控制电路包括模式控制器，用于监视输出电流以确定输出电流是否超过电流阈值。模式控制器控制开关控制器产生开关控制信号。当电流超过电流阈值时，动力传动系统工作在连续传导模式，并且当输出电流下降到或低于当前阈值时，动力传动系的运行从连续传导模式变为脉冲跳跃模式。从连续导通模式输入脉冲跳跃模式，并且涉及确定存储在动力传动系的次级回路中的能量的量。

3. 发明授权

US09401640B2 Voltage droop control in a voltage-regulated switched mode power supply 有权
标题翻译：电压调节开关电源中的电压下降控制
公开(公告)号：US09401640B2
公开(公告)日：2016-07-26
申请号：US14347322
申请日：2013-04-11
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Magnus Karlsson , Oscar Persson , Andreas Svensson
IPC分类号： G05F1/00 , H02M3/158 , H02M7/493 , H02M3/156 , H02M3/28 , H02M7/48 , H02M1/00
CPC分类号： H02M3/158 , H02M3/156 , H02M3/1584 , H02M3/285 , H02M7/493 , H02M2001/0025 , H02M2007/4822
摘要： A switched mode power supply (SMPS) comprising a controller configured to control switching of the SMPS to regulate an output voltage at an output of the SMPS based on a feedback signal that indicates the output voltage, and a voltage droop control circuit. The voltage droop control circuit comprises a voltage droop control signal generator that detects a voltage drop across a component of the SMPS that is indicative of a current flowing through the output of the SMPS during operation. The voltage droop control signal generator is an active device arranged to generate, based on the detected voltage drop, an output voltage droop control signal for causing the controller to adjust the regulation of the output voltage. The voltage droop control circuit further comprises a reference voltage generator arranged to bias at least one of the first and second inputs of the voltage droop control signal generator.
摘要翻译：一种开关模式电源（SMPS），包括控制器，该控制器被配置为基于指示输出电压的反馈信号来控制SMPS的开关以调节SMPS的输出处的输出电压，以及电压下降控制电路。电压下降控制电路包括电压下降控制信号发生器，该电压下降控制信号发生器检测指示在运行期间流过SMPS的输出的电流的SMPS的组件上的电压降。电压下降控制信号发生器是一种有源器件，被布置为基于检测到的电压降产生输出电压下降控制信号，以使控制器调节输出电压的调节。电压下降控制电路还包括参考电压发生器，其布置成偏置电压下降控制信号发生器的第一和第二输入中的至少一个。

4. 发明申请

US20140293662A1 SWITCHED MODE POWER SUPPLY WITH A SIMPLIFIED START-UP SUPPLY 有权
标题翻译：具有简化启动电源的开关模式电源
公开(公告)号：US20140293662A1
公开(公告)日：2014-10-02
申请号：US14112032
申请日：2011-04-15
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Oscar Persson , Mikael Appelberg , Marko Leskovec
IPC分类号： H02M3/335 , H02M1/36
CPC分类号： H02M3/335 , H02M1/36 , H02M3/33507 , H02M3/33523
摘要： A switched mode power supply (SMPS) is disclosed in which a simple primary side controller is used to send a single pulse of energy to the secondary side to switch on an output voltage controller. The pulse is sent across the main power train and a filtering arrangement is provided on the secondary side to minimise the energy at the output of the SMPS while maximising the energy supplied to the output voltage controller. Advantageously, the SMPS is configured such that the maximum amount of energy transferred from the primary side to the secondary side during a start-up operation is inherently limited. Protection against short circuit conditions and malfunctions is therefore provided without requiring complicated circuitry.
摘要翻译：公开了一种开关模式电源（SMPS），其中使用简单的初级侧控制器向次级侧发送单个脉冲能量以接通输出电压控制器。脉冲通过主传动系发送，并且在次级侧上提供过滤装置，以使SMPS的输出处的能量最小化，同时使提供给输出电压控制器的能量最大化。有利地，SMPS被配置为使得在启动操作期间从初级侧传递到次级侧的最大能量的量被固有地限制。因此，在不需要复杂电路的情况下提供防止短路状况和故障的保护。

5. 发明授权

US09985540B2 Reference voltage generator for a switched mode power supply 有权
公开(公告)号：US09985540B2
公开(公告)日：2018-05-29
申请号：US14917144
申请日：2016-02-18
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Magnus Karlsson , Oscar Persson
IPC分类号： G05F1/00 , H02J1/00 , H02M3/335 , H02M3/156
CPC分类号： H02M3/3353 , H02M3/156 , H02M3/335 , H02M3/33507 , H02M3/33561 , H02M3/33569
摘要： An isolated fly-buck converter is provided for converting an input voltage to an output voltage, and for generating a voltage indicative of the input voltage. The isolated fly-buck converter comprises on its secondary side an input voltage sensing circuit for generating the voltage indicative of the input voltage, the input voltage sensing circuit comprising a capacitive element and a rectifying element connected in series. The input voltage sensing circuit is connected across a secondary winding of the isolated fly-buck converter such that the rectifying element prevents current from flowing through the input voltage sensing circuit during the fly-buck phase of operation of the converter. The input voltage sensing circuit also has a voltage buffer arranged to buffer a voltage which is indicative of a sum of the output voltage of the converter and the voltage over the capacitive element, and output the buffered voltage or a voltage based on the buffered voltage as the voltage that is indicative of the input voltage. The output of the voltage buffer is connected to ground via a first resistive element in series with a parallel combination of a second resistive element and a third capacitive element.

6. 发明授权

US09923450B2 Switched mode power supply compensation loop 有权
公开(公告)号：US09923450B2
公开(公告)日：2018-03-20
申请号：US14912564
申请日：2015-05-21
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Magnus Karlsson , Andreas Larsson , Oscar Persson
IPC分类号： H02M3/157 , H02M1/14 , H02M7/04 , H02M3/04 , H02M5/04 , H02M7/44 , H02M1/12
CPC分类号： H02M1/14 , H02M1/12 , H02M1/15 , H02M3/04 , H02M5/04 , H02M7/04 , H02M7/44 , H02M2001/0012
摘要： There is provided a controller for controlling an output current of a switched mode power supply, SMPS. The controller comprises a sampling module arranged to sample a signal indicative of the output current of the SMPS at a frequency higher than a switching frequency of the SMPS, and a filter module arranged to filter out a ripple component of the sampled signal. The filter module comprises: a ripple component estimation module arranged to estimate the ripple component; a moving average calculation module arranged to calculate a moving average of the sampled signal; and a subtraction module arranged to generate a filtered signal by subtracting the estimated ripple component from the sampled signal and the calculated moving average. The controller also has a switching control module arranged to generate a control signal for controlling at least one of the switching frequency and a switching duty cycle of the SMPS based on the filtered signal.

7. 发明授权

US09755532B2 Isolated fly-buck converter, switched mode power supply, and method of measuring a voltage on a secondary side of an isolated fly-buck converter 有权
公开(公告)号：US09755532B2
公开(公告)日：2017-09-05
申请号：US14410848
申请日：2014-03-11
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Magnus Karlsson , Oscar Persson
IPC分类号： H02M3/335 , H02M3/158 , H02M1/00
CPC分类号： H02M3/33569 , H02M3/158 , H02M3/335 , H02M3/3353 , H02M2001/0022
摘要： An isolated fly-buck converter provided for converting an input voltage (Vin) to an output voltage (VS) comprises (i) on a primary side, a primary winding (X1) and a non-isolated buck (CP) connected in series, and a pair of switches (Q1, Q2), wherein the switches are switchable between a forward phase, in which the primary winding and the non-isolated buck are connected to the input voltage, and a fly-buck phase, in which the primary winding and the non-isolated buck are disconnected from the input voltage and are connected to one another in a closed circuit; and (ii) on a secondary side, a secondary winding (X2) coupled to the primary winding, and a first capacitive element (CS) connected over the secondary winding and a first rectifying element (D1) connected to the secondary winding to prevent current from being flown through the secondary winding during the forward phase, wherein the output voltage is achieved as the voltage over the first capacitive element. A supplementary circuitry is provided at the secondary side by aid of which the input voltage can be measured on the secondary side, the supplementary circuitry comprising a second capacitive element (CF) and a second rectifying element (D2) connected in series, wherein the supplementary circuitry is connected over the second wiring such that the second rectifying element prevents current from being flown through the supplementary circuitry during the fly-buck phase, wherein the sum of the voltage over the second capacitive element and the output voltage is indicative of the input voltage.

8. 发明授权

US09680387B2 Switched mode power supply, base station, and method of operating a switched mode power supply 有权
公开(公告)号：US09680387B2
公开(公告)日：2017-06-13
申请号：US14768425
申请日：2014-11-17
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： Magnus Karlsson , Oscar Persson , Fredrik Wahledow
IPC分类号： H02M3/335 , H02M1/00
CPC分类号： H02M3/33592 , H02M3/335 , H02M3/33523 , H02M3/33553 , H02M2001/0022
摘要： A switched mode power supply comprising a switched mode converter and a controller for controlling the switched mode converter, the switched mode converter being provided for converting an input voltage to an output voltage and including, on a primary side, a primary winding and a controllable switch based circuitry connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding coupled to the primary winding and a capacitive element 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 and at least one further winding portion and the switch based circuitry comprises controllable switches capable of controlling the duty cycle of the switched mode converter and 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. The controller comprises a first control arrangement connected to monitor the output voltage of the switched mode converter and 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. The controller further comprises a second control arrangement connected to monitor the input voltage of the switched mode converter and 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.

9. 发明授权

US09559601B2 Forward-flyback topology switched mode power supply 有权
标题翻译：正向回扫拓扑开关电源
公开(公告)号：US09559601B2
公开(公告)日：2017-01-31
申请号：US14235931
申请日：2013-02-28
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Oscar Persson , Mikael Appelberg , Magnus Karlsson
IPC分类号： H02M3/335
CPC分类号： H02M3/33546 , H02M1/08 , H02M3/33538 , H02M3/33576 , H02M3/33592 , H03K2017/307 , Y02B70/1475
摘要： A switched mode power supply (400), comprising a transformer (410) having a primary winding (410-1), a transformer core (410-3) configured to store energy transferred thereto from the primary winding (410-1) during operation, and a secondary winding (410-2) having a first terminal (T1) and a second terminal (T2). The switched mode power supply also has a primary side circuit (Q1, Q2, C1) arranged to generate voltage pulses and thereby to drive the primary winding (410-1) of the transformer (410), and a secondary side circuit comprising a rectification circuit connected to the secondary winding (410-2) at the first and second terminals (T1, T2). The rectification circuit is arranged such that during a forward phase of operation of the switched mode power supply, in which the primary winding (410-1) is driven by the primary side circuit to magnetize, and store energy in, the transformer core (410-3), a current induced to flow in the secondary winding (410-2) from the second terminal (T2) to the first terminal (T1) is output by the rectification circuit. The rectification circuit is further arranged such that during a fly-back phase of operation of the switched mode power supply, in which the magnetization of the transformer core (410-3) is reset, a current induced to flow in the secondary winding from the first terminal (T1) to the second terminal (T2) of the secondary winding (410-2) is output by the rectification circuit so that energy stored in the transformer (410) during the forward phase of operation is output by the rectification circuit.
摘要翻译：一种开关模式电源（400），包括具有初级绕组（410-1）的变压器（410），被配置为在操作期间存储从初级绕组（410-1）传递到其上的能量的变压器铁心（410-3）以及具有第一端子（T1）和第二端子（T2）的次级绕组（410-2）。开关模式电源还具有被配置为产生电压脉冲从而驱动变压器（410）的初级绕组（410-1）的初级侧电路（Q1，Q2，C1），以及辅助侧电路，其包括整流电路连接到第一和第二端子（T1，T2）处的次级绕组（410-2）。整流电路被布置成使得在开关模式电源的正向工作相位期间，初级绕组（410-1）被初级侧电路驱动以磁化并将能量存储在变压器铁心（410）中 -3）时，通过整流电路输出从次级绕组（410-2）感应到从第二端子（T2）流向第一端子（T1）的电流。整流电路进一步被布置成使得在其中复位变压器铁芯（410-3）的磁化的开关模式电源的操作的回火阶段期间，引起在次级绕组中从由整流电路输出到次级绕组（410-2）的第二端子（T2）的第一端子（T1），从而在正向运行期间存储在变压器（410）中的能量由整流电路输出。

10. 发明授权

US09621052B2 Switched mode power supply and method of operating a switched mode power supply 有权
公开(公告)号：US09621052B2
公开(公告)日：2017-04-11
申请号：US14430933
申请日：2014-05-15
申请人： Telefonaktiebolaget L M Ericsson (publ)
发明人： Magnus Karlsson , Oscar Persson
IPC分类号： H02M3/335 , H02M1/08
CPC分类号： H02M3/33507 , H02M1/08 , H02M3/33523
摘要： 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 (Vin) to an output voltage (Vout) and includes, on a primary side, a primary winding (X1) and a controllable switch based circuitry (31) connecting the input voltage over the primary winding; and, on a secondary side, a secondary winding (X2) 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 (np1) and at least one further winding portion (np2); and the switch based circuitry comprises controllable switches (Q11, Q41, Q12, Q42, Q21, Q31) 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 (n1, n2).

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