专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2013152785A1 AN ELECTRONIC CIRCUIT WITH A CURRENT RIPPLE FILTER 审中-公开
标题翻译：具有电流纹波滤波器的电子电路
公开(公告)号：WO2013152785A1
公开(公告)日：2013-10-17
申请号：PCT/EP2012/056445
申请日：2012-04-10
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , OLSSON, Jörgen , APPELBERG, Mikael , SVENSSON, Martin
发明人： OLSSON, Jörgen , APPELBERG, Mikael , SVENSSON, Martin
IPC分类号： H02J3/01 , H02J1/02
CPC分类号： G05B9/02 , H02J1/02 , H02J3/01 , H02M1/15 , H03G1/00 , H03H7/0107 , Y02E40/40 , Y10T307/826 , Y10T307/865
摘要： An electronic circuit (100) comprising an ACRF (110) comprising an active component (102), an energy storage unit (104), an input port (101) and an output port (102). The electronic circuit (100) comprises a control unit (105) to control the ACRF. A detector detects a short circuit at the input port (101) or the absence of an energy supply at the input port (101). The control unit (105) controls the ACRF to function as an ACRF if the detector detects a power supply connected to the input port or that there is no short circuit at the input port, and controls the ACRF to stop functioning as an ACRF and to discharge energy from its energy storage unit (104) to its output port (102) if the detector detects a short circuit at the input port (101) or no power supply connected to the input port.
摘要翻译：一种包括ACRF（110）的电子电路（100），包括有源部件（102），能量存储单元（104），输入端口（101）和输出端口（102）。电子电路（100）包括用于控制ACRF的控制单元（105）。检测器检测输入端口（101）处的短路或输入端口（101）处的能量供应不存在。如果检测器检测到连接到输入端口的电源或者输入端口没有短路，则控制单元（105）控制ACRF用作ACRF，并且控制ACRF停止用作ACRF，并且如果检测器检测到输入端口（101）处的短路或没有连接到输入端口的电源，则将能量从其能量存储单元（104）释放到其输出端口（102）。

2. 发明申请

WO2011115533A1 ENVELOPE TRACKING SWITCHING HYBRID 审中-公开
标题翻译：安全跟踪开关混合
公开(公告)号：WO2011115533A1
公开(公告)日：2011-09-22
申请号：PCT/SE2010/050292
申请日：2010-03-16
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , JOHANSSON, Jan , APPELBERG, Mikael , ARONSSON, Anders
发明人： JOHANSSON, Jan , APPELBERG, Mikael , ARONSSON, Anders
IPC分类号： H03F1/02 , H03F3/19 , H02M3/158
CPC分类号： H03F3/19 , H03F1/0211 , H03F1/0227 , H03F1/025 , H03F2200/102 , H03F2200/324 , H03F2200/451 , H03F2200/504 , H03F2200/507 , H03F2203/21193 , H03F2203/21196
摘要： A hybrid envelope tracking system capable of transition between a passive, switching, and/or active mode of operation with minimized parasitic oscillations is presented. The system may include a voltage control circuit comprising first and second node interfaces configured to receive first and second voltages respectively. An input node interface may be configured to receive an input envelope signal. An enablement node interference may be configured to receive an enablement signal, the enablement signal setting a transition between a passive or switching mode of operation to an active mode of operation. The circuit may further include a modulation transistor driven by a single floating operational amplifier. The modulation transistor may be used to modulate a supplied voltage with respect to the received envelope signal during the active operating regime.
摘要翻译：提出了能够在最小的寄生振荡之间在无源，开关和/或主动操作模式之间转换的混合包络跟踪系统。该系统可以包括电压控制电路，其包括分别接收第一和第二电压的第一和第二节点接口。输入节点接口可以被配置为接收输入包络信号。启用节点干扰可以被配置为接收启用信号，启用信号设置无源或切换操作模式之间的转换到主动操作模式。电路还可以包括由单个浮动运算放大器驱动的调制晶体管。在活动操作状态期间，调制晶体管可用于相对于所接收的包络信号调制所提供的电压。

3. 发明申请

WO2013037430A1 SYNCHRONOUS NON-ISOLATED PUSH-PULL CONVERTER 审中-公开
标题翻译：同步非隔离式推拉式转换器
公开(公告)号：WO2013037430A1
公开(公告)日：2013-03-21
申请号：PCT/EP2011/074086
申请日：2011-12-27
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , APPELBERG, Mikael
发明人： APPELBERG, Mikael
IPC分类号： H02M3/158
CPC分类号： H02M3/1584 , H02M3/1588 , H02M3/337 , H02M3/3378
摘要： A push-pull converter (400) configured to convert an input voltage to an output voltage according to a transfer ratio is provided. The push-pull converter (400) comprises a transformer (410), a first and a second switch transistor (421, 422) arranged to operatively provide the input voltage to the transformer (410) such that the transfer ratio is obtainable, a first and a second rectification transistor (431, 432) arranged to operatively receive a first and a second part, respectively, of the output voltage from the transformer (410) such that the transfer ratio is obtainable. The push-pull converter (400) is further configured to synchronously operate the first switch transistor (421) and the first rectification transistor (431), synchronously operate the second switch transistor (422) and the second rectification transistor (432), and operate the first and second switch transistors (421, 422) 180 degrees out of phase with respect to each other.
摘要翻译：提供了被配置为根据传送比将输入电压转换为输出电压的推挽转换器（400）。推挽转换器（400）包括变压器（410），第一和第二开关晶体管（421,422），其布置成可操作地将输入电压提供给变压器（410），使得可以获得传输比，第一以及第二整流晶体管（431,432），其布置成分别可操作地接收来自变压器（410）的输出电压的第一和第二部分，使得可以获得传输比。推挽转换器（400）还被配置为同步操作第一开关晶体管（421）和第一整流晶体管（431），同步地操作第二开关晶体管（422）和第二整流晶体管（432），并且操作第一和第二开关晶体管（421,422）彼此相位相差180度。

4. 发明申请

WO2009157820A1 A POWER SUPPLY AND A METHOD OF EXTRACTING A BIAS VOLTAGE FROM A POWER SUPPLY 审中-公开
标题翻译：电源和从电源提取偏置电压的方法
公开(公告)号：WO2009157820A1
公开(公告)日：2009-12-30
申请号：PCT/SE2008/050741
申请日：2008-06-23
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , SVÄRDSJÖ, Claes , APPELBERG, Mikael
发明人： SVÄRDSJÖ, Claes , APPELBERG, Mikael
IPC分类号： H02M3/335
CPC分类号： H02M3/33569 , H02M2001/0006
摘要： A power supply providing a bias voltage and being more compact than prior art power supplies is achieved by a power supply comprising a transformer controlled by a primary switch. The transformer having a primary winding and a secondary winding, at least one of said windings comprising a number of sections. The power supply comprises circuitry for extracting a bias voltage across at least one of said sections.
摘要翻译：提供偏置电压并且比现有技术电源更紧凑的电源通过包括由主开关控制的变压器的电源来实现。所述变压器具有初级绕组和次级绕组，所述绕组中的至少一个包括多个部分。电源包括用于在所述部分中的至少一个上提取偏置电压的电路。

5. 发明申请

WO2009154545A1 A SWITCH MODE CONVERTER AND A METHOD OF STARTING A SWITCH MODE CONVERTER 审中-公开
标题翻译：开关模式转换器和启动开关模式转换器的方法
公开(公告)号：WO2009154545A1
公开(公告)日：2009-12-23
申请号：PCT/SE2009/050677
申请日：2009-06-05
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (publ) , APPELBERG, Mikael
发明人： APPELBERG, Mikael
IPC分类号： H02M1/36 , H02M3/335
CPC分类号： H02M1/36 , H02M3/33592 , Y02B70/1475
摘要： For a more stable start-up procedure, a switch mode power converter has at least one inductive component including an output inductor Ll and a synchronous rectification element (T5,T6), said power converter comprising a control device and being characterized in that the control device is arranged, at startup of the power converter, to determine a duty-cycle of the control signal, including a normal pulse width of the control pulse, and provide an initial control signal to the at least one switch element that is designed to balance the current in the at least one inductive component of the converter. The initial control signal preferably has a duration of 50% of the normal pulse width,
摘要翻译：为了更稳定的启动过程，开关模式功率转换器具有包括输出电感器L1和同步整流元件（T5，T6）的至少一个电感分量，所述功率转换器包括控制装置，其特征在于，所述控制在功率转换器启动时，设备包括确定包括控制脉冲的正常脉冲宽度的控制信号的占空比，并向设计成平衡的至少一个开关元件提供初始控制信号转换器的至少一个电感分量中的电流。初始控制信号优选具有正常脉冲宽度的50％的持续时间，

6. 发明申请

WO2013117226A1 CONTROL OF TRANSFORMER FLUX DENSITY IN AN ISOLATED SWITCHED MODE POWER SUPPLY 审中-公开
标题翻译：隔离开关电源中变压器漏磁密度的控制
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
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KARLSSON, Magnus , APPELBERG, Mikael , PERSSON, Oscar
发明人： KARLSSON, Magnus , APPELBERG, Mikael , PERSSON, Oscar
IPC分类号： H02M1/40
CPC分类号： H02M1/40 , H02M3/33538 , H02M3/33592 , H02M3/3378 , Y02B70/1475
摘要： 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.
摘要翻译：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。

7. 发明申请

WO2009154523A1 A POWER CONVERTER 审中-公开
标题翻译：电源转换器
公开(公告)号：WO2009154523A1
公开(公告)日：2009-12-23
申请号：PCT/SE2008/050723
申请日：2008-06-17
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , APPELBERG, Mikael
发明人： APPELBERG, Mikael
IPC分类号： H02M3/335
CPC分类号： H02M3/33592 , Y02B70/1475
摘要： An isolated power converter comprising a transformer (TR1) arranged in such a way that the mirrored primary voltage on the secondary side has a positive potential relative to ground, said converter comprising a derivating net (C1, R1) arranged to cause the second transistor (T2) to conduct in dependence of the voltage across the secondary winding, the source of the second transistor being connected to the negative end of the secondary winding, the drain of a third transistor (T3) further being connected to the positive end of the secondary winding, a second capacitor (C2) and a second resistor (R2) being connected between the gate and the source of the third transistor (T3), a third resistor (R3) connected between the second resistor (R2) and the drain of the second transistor (T2), a third capacitor (C3) connected between the sources of the second (T2) and third (T3) transistors to provide a first output voltage (Ucc) on one terminal of the third capacitor (C3) and a second output voltage (Uff) on the other terminal of the third capacitor (C3).
摘要翻译：一种隔离电力转换器，包括变压器（TR1），其被布置成使得次级侧上的镜像初级电压相对于地面具有正电位，所述转换器包括被布置成使第二晶体管（ T2）根据次级绕组两端的电压进行导通，第二晶体管的源极连接到次级绕组的负端，第三晶体管（T3）的漏极进一步连接到次级绕组的正端绕组，连接在第三晶体管（T3）的栅极和源极之间的第二电容器（C2）和第二电阻器（R2），连接在第二电阻器（R2）和漏极之间的第三电阻器（R3）第二晶体管（T2），连接在第二（T2）和第三（T3）晶体管的源极之间的第三电容器（C3），以在第三电容器（C3）的一个端子上提供第一输出电压（Ucc）输出量第三电容器（C3）的另一个端子上的刻度（Uff）。

8. 发明申请

WO2014131455A1 FORWARD-FLYBACK TOPOLOGY SWITCHED MODE POWER SUPPLY 审中-公开
标题翻译：前向FLYBACK拓扑切换模式电源
公开(公告)号：WO2014131455A1
公开(公告)日：2014-09-04
申请号：PCT/EP2013/054051
申请日：2013-02-28
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
发明人： PERSSON, Oscar , APPELBERG, Mikael , KARLSSON, Magnus
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 (Tl) 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 (Tl, 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 magnetise, 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 (Tl) is output by the rectification circuit. The rectification circuit is further arranged such that during a flyback phase of operation of the switched mode power supply, in which the magnetisation of the transformer core (410-3) is reset, a current induced to flow in the secondary winding from the first terminal (Tl) 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）。整流电路布置成使得在开关模式电源的正向运行阶段中，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开关模式电源的操作的回扫阶段期间，变压器铁芯（410-3）的磁化被复位，在次级绕组中从第一端子通过整流电路输出到次级绕组（410-2）的第二端子（T2）的电流（T1），使得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。

9. 发明申请

WO2012062367A1 OVERLOAD DETECTION IN A SWITCHED MODE POWER SUPPLY 审中-公开
标题翻译：开关电源中的过载检测
公开(公告)号：WO2012062367A1
公开(公告)日：2012-05-18
申请号：PCT/EP2010/067282
申请日：2010-11-11
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , PERSSON, Oscar , APPELBERG, Mikael
发明人： PERSSON, Oscar , APPELBERG, Mikael
IPC分类号： H02M3/335 , H02M1/32
CPC分类号： H02H7/1213 , H02M1/32 , H02M3/33507
摘要： A switched mode power supply, comprising: a switching device (110), the switched mode power supply being operable to convert an input voltage (V in ) to an output voltage (V out ) by switching the switching device; a feedback circuit (140) operable to generate a feedback signal based on at least one of the output voltage and an output current of the switched mode power supply; a current limiting circuit (160, 170') operable to determine a current in the switched mode power supply and generate an excess current control signal when the current exceeds a current threshold; and a controller (150). The controller is arranged to receive the feedback signal and the excess current control signal, and operable to control the switching device (110): in a first operational mode when the current determined by the current limiting circuit is below the current threshold, to regulate one of the output voltage and the output current based on the feedback signal; and in a second operational mode when the current determined by the current limiting circuit exceeds the current threshold, to reduce the current in the switched mode power supply on the basis of the excess current control signal. The power supply further comprises an overload detector (180), which is arranged to receive the feedback signal and operable to: determine whether the feedback signal is outside a predetermined range; if the feedback signal is outside the predetermined range, determine that the switched mode power supply is in an overload state; and when an overload state is determined, perform control to place the switched mode power supply in a non-operational state.
摘要翻译：一种开关式电源，包括：开关装置（110），所述开关模式电源可操作以通过切换所述开关装置将输入电压（Vin）转换为输出电压（Vout）; 反馈电路（140），其可操作以基于所述开关模式电源的输出电压和输出电流中的至少一个产生反馈信号; 电流限制电路（160,170'），用于确定所述开关模式电源中的电流，并且当电流超过电流阈值时产生过电流控制信号; 和控制器（150）。控制器设置为接收反馈信号和过电流控制信号，并且可操作以控制开关装置（110）：当由限流电路确定的电流低于电流阈值时，在第一操作模式中，调节一个基于反馈信号的输出电压和输出电流; 以及当由所述电流限制电路确定的电流超过所述电流阈值时，在所述第二操作模式中，基于所述过电流控制信号来减小所述开关模式电源中的电流。电源还包括过载检测器（180），其被布置成接收反馈信号并且可操作以：确定反馈信号是否在预定范围之外; 如果反馈信号超出预定范围，则确定开关模式电源处于过载状态; 并且当确定过载状态时，执行控制以将开关模式电源置于非操作状态。

10. 发明申请

WO2007061369A1 PRE-BIASED CIRCUIT FOR SYNCHRONOUS RECTIFIED POWER CONVERTERS 审中-公开
标题翻译：用于同步整流电源转换器的预偏置电路
公开(公告)号：WO2007061369A1
公开(公告)日：2007-05-31
申请号：PCT/SE2006/050247
申请日：2006-07-06
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , APPELBERG, Mikael
发明人： APPELBERG, Mikael
IPC分类号： G05F1/46 , H02M1/00 , H02M1/08 , H02M3/335
CPC分类号： H02M1/08 , H02M1/36 , H02M3/335 , H02M2001/0025
摘要： The present invention relates to voltage converters and especially to a control circuit with an input from the voltage converter output and arranged to control the voltage level on the voltage converter output. The problem addressed relates to the situation when there is a pre-bias voltage on the converter output at the moment it is switched on. The object of the control circuit is to increase the voltage on the converter output fast and avoiding any drain of voltage or current from the output at the start up sequence. This is performed by a comparator in the control circuit that is arranged to compare the reference voltage with a division of the output voltage and if the reference voltage is lower that the divided output voltage the reference voltage is increased at the comparator output. The comparator circuit includes an OP-amplifier.
摘要翻译：本发明涉及电压转换器，特别涉及一种具有来自电压转换器输出的输入并被设置为控制电压转换器输出上的电压电平的控制电路。所解决的问题涉及当转换器输出接通时转换器输出上存在预偏置电压的情况。控制电路的目的是快速增加转换器输出上的电压，并避免在启动顺序时输出电压或电流的任何漏极。这由控制电路中的比较器执行，该比较器被配置为将参考电压与输出电压的分频进行比较，并且如果参考电压低于在比较器输出处参考电压增加的分压输出电压。比较器电路包括OP放大器。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式