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1. 发明公开

EP2955829A4 BOOST CIRCUIT, BACKLIGHT DRIVER CIRCUIT AND BACKLIGHT MODULE 有权
标题翻译：增益电路尾灯驱动电路与背光模组
公开(公告)号：EP2955829A4
公开(公告)日：2016-11-09
申请号：EP13866487
申请日：2013-03-29
申请人： BOE TECHNOLOGY GROUP CO LTD , BEIJING BOE DISPLAY TECH CO
发明人： ZHANG BIN , ZHANG LIANG , HU WEIHAO
IPC分类号： H02M3/155 , G09G3/34
CPC分类号： H05B33/0851 , G09G3/34 , G09G2330/02 , H02M3/156 , H02M3/1563 , H05B33/0815 , H05B33/089
摘要： A boosting circuit, a backlight driving circuit and a backlight module are provided. The boosting circuit comprises a boosting chip (U1), an energy-storage inductor (L1), a freewheeling diode (D1), a first capacitor (C1), and a current mirror unit (U2), wherein an input terminal of an inputting branch of the current mirror unit (U2) IS connected with the cathode of the freewheeling diode (D1), and an output terminal of the inputting branch is connected with the signal input terminal (Vin) of the boosting circuit through a first resistor (R1), an input terminal of an outputting branch of the current mirror unit (U2) IS connected with the cathode of the freewheeling diode (D1), an output terminal of the outputting branch is grounded through a second resistor (R2), an ungrounded terminal of the second resistor (R2) is connected with a signal feedback pin of the boosting chip. The boosting circuit realizes the tracking of changes of the input voltage by the output voltage under the precondition that parameters of respective elements are unchanged, and achieves the effect that a voltage difference between the output voltage and the input voltage is fixed.

2. 发明公开

EP2965414A1 FEED-FORWARD FREQUENCY CONTROL METHOD FOR CURRENT MODE HYSTERETIC BUCK REGULATOR 有权
标题翻译：程序正向耦合变频调速动力操作HYSTERESE上下转换器
公开(公告)号：EP2965414A1
公开(公告)日：2016-01-13
申请号：EP14715731.7
申请日：2014-03-04
申请人： Qualcomm Incorporated
发明人： MUKHERJEE, Sugato
IPC分类号： H02M3/156
CPC分类号： H03K17/56 , H02M3/1563
摘要： A hysteresis generator provides a hysteresis parameter V_hyst to a hysteresis comparator of a voltage regulator. The hysteresis parameter V_hyst is a function of circuit components of the hysteresis generator, a voltage output Vout of the regulator, a voltage input Vin of the regulator, and a signal that drives one of a plurality of switches of the regulator. A switch driver drives the switches based on the hysteresis parameter. One or more of the circuit components of the hysteresis generator that provide the hysteresis parameter also define a hysteresis time period T_ hyst. The hysteresis time period T_ hyst defines in combination with a delay time period T_Td of the regulator, a switching time period T for the regulator that is substantially constant.

3. 发明授权

EP2232686B1 BUCK-KONVERTER ZUM BEREITSTELLEN EINES STROMS FÜR MINDESTENS EINE LED 有权
标题翻译：降压变换器，以提供流动至少一个LED
公开(公告)号：EP2232686B1
公开(公告)日：2011-07-20
申请号：EP08701587.1
申请日：2008-01-18
申请人： OSRAM Gesellschaft mit beschränkter Haftung
发明人： RUDOLPH, Bernd
IPC分类号： H02M3/156 , H05B33/08
CPC分类号： H02M3/1563 , H05B33/0815 , H05B33/0818 , Y02B20/346
摘要： The invention relates to a buck converter for making power available to at least one LED, comprising a buck diode (D2), a buck throttle (TR1, w1) and a main buck switch (Q1), the buck diode (D2) and the main buck switch (Q1) being connected in series between the first (E1) and the second input connection (E2), the connecting point (VP1) between the buck diode (D2) and the main buck switch (Q1) being connected to the second output connection (A2); the first connection of the buck throttle (TR1, w1) being connected to the first input connection (E1) and the second connection of the buck throttle (TR1, w1) to the first output connection (A1); the buck converter further comprising: a first auxiliary winding (TR1, w1) connected to the buck throttle, said auxiliary winding being connected to the second input connection (E2) and to the control electrode of the main buck switch (Q1), the first auxiliary winding (TR1, w3) being connected to the buck throttle (TR1, w1) in such a manner that when power flows through the main buck switch (Q1), the first auxiliary winding (Tr1, w3) makes power available to the control electrode of the main buck switch (Q1).

4. 发明公开

EP2264881A2 Frequency limitation method with time hysteresis used in quasi-resonant control 有权
标题翻译： mit ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird ird
公开(公告)号：EP2264881A2
公开(公告)日：2010-12-22
申请号：EP10251091.4
申请日：2010-06-16
申请人： Monolithic Power Systems, Inc.
发明人： Zhang, Junming , Ren, Yuancheng , Hu, Jin , Lu, Huanyu , Shi, Yang
IPC分类号： H02M3/335
CPC分类号： H02M3/338 , H02M3/1563 , Y02B70/1425 , Y02B70/1433
摘要： A frequency limitation method used in quasi-resonant control of a switching regulator is disclosed. The switching frequency is limited through setting a minimum time limit, such as a minimum switching period or a minimum OFF time. The minimum time limit may be a first time limit or a second time limit. The minimum time limit is changed into another value if the minimum voltage point approaches the minimum time limit point, so as to eliminate the audible noise.
摘要翻译：公开了一种用于开关调节器的准谐振控制的频率限制方法。通过设置最小时间限制（如最小切换周期或最小关闭时间）来限制开关频率。最小时限可以是第一时限或第二时限。如果最小电压点接近最小时限，则将最小时间限制改为另一个值，以消除可听见的噪声。

5. 发明公开

EP2232686A1 BUCK-KONVERTER ZUM BEREITSTELLEN EINES STROMS FÜR MINDESTENS EINE LED 有权
标题翻译：降压变换器，以提供流动至少一个LED
公开(公告)号：EP2232686A1
公开(公告)日：2010-09-29
申请号：EP08701587.1
申请日：2008-01-18
申请人： Osram Gesellschaft mit beschränkter Haftung
发明人： RUDOLPH, Bernd
IPC分类号： H02M3/156 , H05B33/08
CPC分类号： H02M3/1563 , H05B33/0815 , H05B33/0818 , Y02B20/346
摘要： The invention relates to a buck converter for making power available to at least one LED, comprising a buck diode (D2), a buck throttle (TR1, w1) and a main buck switch (Q1), the buck diode (D2) and the main buck switch (Q1) being connected in series between the first (E1) and the second input connection (E2), the connecting point (VP1) between the buck diode (D2) and the main buck switch (Q1) being connected to the second output connection (A2); the first connection of the buck throttle (TR1, w1) being connected to the first input connection (E1) and the second connection of the buck throttle (TR1, w1) to the first output connection (A1); the buck converter further comprising: a first auxiliary winding (TR1, w1) connected to the buck throttle, said auxiliary winding being connected to the second input connection (E2) and to the control electrode of the main buck switch (Q1), the first auxiliary winding (TR1, w3) being connected to the buck throttle (TR1, w1) in such a manner that when power flows through the main buck switch (Q1), the first auxiliary winding (Tr1, w3) makes power available to the control electrode of the main buck switch (Q1).

6. 发明公开

EP2195914A1 A SELF-OSCILLATING CONVERTER 有权
标题翻译：自激振荡转换器
公开(公告)号：EP2195914A1
公开(公告)日：2010-06-16
申请号：EP08787195.0
申请日：2008-08-13
申请人： TEXAS INSTRUMENTS DEUTSCHLAND GMBH
发明人： GIBSON, Neil , SCOONES, Kevin
IPC分类号： H02M3/156
CPC分类号： H02M3/1563 , H02M2001/0025
摘要： The converter has a main feedback path (Vout, R4, R5) and two auxiliary feedback paths (R1, C1; R2, C2)rom an output node to an auxiliary differential input pair of a comparator. The auxiliary feedback paths have different RC time constants so that a differential ramp signal is effectively applied to the auxiliary differential inputs of the comparator. The circuit design compensates for a negligibly small equivalent series resistor of an output capacitor (Cload) so that modern capacitors may be used without compromising the stable oscillation of the converter.

7. 发明公开

EP1596490A1 DC-DC converter in PFM mode 有权转让
标题翻译： Gleichstromwandler im Pulsfrequenzmodulation-Modus
公开(公告)号：EP1596490A1
公开(公告)日：2005-11-16
申请号：EP05300290.3
申请日：2005-04-19
申请人： Thomson Licensing
发明人： Kögel, Reinhard , Louvel, Jean-Paul , Hermann, Wolfgang
IPC分类号： H02M3/158
CPC分类号： H02M3/1563
摘要： The switching DC-DC converter comprises an inductor (L1), a control circuit (IC1) with an oscillator (OS) and an output stage (Q1, Q2), the output stage (Q1, Q2) being coupled to the inductor (L1), a diode (D1) coupled to the inductor (L1), and a feedback loop (FB) for generating a stabilized output voltage (U3). An output voltage (U1, U2) of the output stage (Q1, Q2) is coupled with an oscillator input (3) of the control circuit (IC1), for example via an impedance (R7), for synchronizing an oscillation cycle of the oscillator (OS) with a current pulse of the output stage (Q1, Q2).
摘要翻译：开关DC-DC转换器包括电感器（L1），具有振荡器（OS）和输出级（Q1，Q2）的控制电路（IC1），输出级（Q1，Q2）耦合到电感器），耦合到电感器（L1）的二极管（D1）和用于产生稳定的输出电压（U3）的反馈回路（FB）。输出级（Q1，Q2）的输出电压（U1，U2）例如通过阻抗（R7）与控制电路（IC1）的振荡器输入（3）耦合，以使振荡器（OS）与输出级（Q1，Q2）的电流脉冲。

8. 发明公开

EP1350305A1 TIEFSETZSTELLER 有权
标题翻译：深盘SET
公开(公告)号：EP1350305A1
公开(公告)日：2003-10-08
申请号：EP01271964.7
申请日：2001-12-13
申请人： SIEMENS AKTIENGESELLSCHAFT
发明人： FORMANEK, Karl
IPC分类号： H02M3/155
CPC分类号： H02M3/1563
摘要： The invention relates to a step-down converter comprising a self-conducting switching transistor and an inductance (L) located in a series arm and a freewheeling diode (DF) in a shunt arm. The switching transistor (T1) is controlled by a control transistor (T2), which supplies a blocking voltage that is generated by a Zener diode (D1) in the series arm to the switching transistor, once a maximum value for the direct-axis current has been reached.

9. 发明公开

EP0978933A3 Gleichspannungswandler 有权
标题翻译： DC转换器
公开(公告)号：EP0978933A3
公开(公告)日：2003-07-16
申请号：EP99115506.0
申请日：1999-08-05
申请人： STMicroelectronics GmbH
发明人： Richter, Peter , Teissier, Maxime
IPC分类号： H02M3/156
CPC分类号： H02M3/1563
摘要： Gleichspannungswandler zur Gleichspannungsherabwandlung, mit zwei Eingangsanschlüssen (E1, E2) zum Anschließen an eine Eingangsgleichspannungsquelle hohen Spannungswertes; mit zwei Ausgangsanschlüssen (A1, A2) zum Abnehmen einer geregelten niedrigen Ausgangsgleichspannung; mit einer einen Mittenabgriff (MA) aufweisenden Spule (TS), die einen Endes (TA1) über eine elektronische Schaltereinrichtung (MOS) mit einem ersten (E1) der Eingangsanschlüsse und anderen Endes (TA2) über einen ersten Kondensator (C1) mit dem zweiten Eingangsanschluß (E2) verbunden ist; wobei die Ladespannung des ersten Kondensators (C1) die Ausgangsgleichspannung bildet; mit einem zweiten Kondensator (C6), der einen Endes mit einem zwischen Schalteinrichtung (MOS) und Spule (TS) befindlichen Schaltungsknoten und anderen Endes über eine erste Diode (D2) mit dem Mittenabgriff (MA) verbunden ist; mit einer Steuereinrichtung (EV, PWM) mittels welcher die Ladespannung des zweiten Kondensators (C6) mit einer Referenzspannung (REF) vergleichbar und die Schaltereinrichtnung (MOS) mit einer von dem Vergleichsergebnis abhängenden pulsfrequenz- und/oder pulsbreitenmodulierten Schaltimpulsfolge leitend und nicht-leitend schaltbar ist; und mit einer zweiten Diode (D1), die zwischen den Mittenabgriff (MA) und den zweiten Eingangsanschluß (E2) geschaltet ist; wobei die beiden Dioden (D1, D2) derart gepolt sind, daß sie bezüglich des bei nicht-leitend geschalteter Schaltereinrichtung (MOS) am Mittenabgriff (MA) auftretenden Potentials zum zweiten Kondensator (C6) hin bzw. vom zweiten Eingangsanschluß (E2) weg leitend sind.
摘要翻译： DC转换器，用于DC电压转换，具有用于连接到高压DC输入电压源的两个输入端子（E1，E2）具有两个输出端子（A1，A2），用于去除经调节的低DC输出电压; 具有通过第一电容器（C1）到所述第二具有输入端子的第一（E1）和另一端（TA2）的中心抽头（MA）线圈（TS），所述一个端部（TA1）经由电子开关器件（MOS）输入端子（E2）连接; 其中第一电容器（C1）的充电电压形成DC输出电压; 被连接到第二电容器（C6），该电路节点位于一个端部与中间开关器件（MOS）和线圈（TS）和经由第一二极管（D2）的中心抽头（MA）的另一端; 与控制装置（EV，PWM）借助于所述第二电容器（C6）与参考电压（REF）可比较和开关的充电电压是指指示与该比较结果的脉冲速率和/或脉冲宽度调制的开关脉冲序列导通和非导通切换依赖配体干燥（MOS）是; 和连接在中心抽头（MA）和第二输入端（E2）之间的第二二极管（D1）; 其中，所述两个二极管（D1，D2）被极化，使得其导电在与远相对于非导电性切换开关装置（MOS）势（MA），其与所述第二电容器（C6）朝向和来自第二输入端（E2）发生的情况下的中心抽头是。

10. 发明公开

EP1269614A2 OSCILLATORLESS DC-DC POWER CONVERTER 审中-公开
标题翻译： DC法官在不OSC
公开(公告)号：EP1269614A2
公开(公告)日：2003-01-02
申请号：EP01922422.9
申请日：2001-03-16
申请人： The Board of Trustees of the University of illinois
发明人： NEBRIGIC, Dragan, Danilo , JEVTITCH, Milan, Marcel , GARTSTEIN, Vladimir , MILAM, William, Thomas , SHERRILL, James, Vig , BUSKO, Nicholas , HANSEN, Peter
IPC分类号： H02M3/00
CPC分类号： H02M3/156 , H02M1/36 , H02M3/1563 , H02M3/1588 , Y02B70/1466
摘要： A power converter for coupling an energy source to a load device comprising a selectively coupled output stage to deliver energy from an energy source to a load device, a controller coupled to the output stage, an output stage, a capacitive element coupled to the output terminals, a rectifying element, and a switch responsive to a control signal from the controller. The rectifying element and switch are coupled to the inductive and capacitive elements. The controller is responsive to input signals for generating the control signal to open the switch in a first state and close the switch in a second state. The input signals to the controller produce one or more output voltages across the output terminals, an input voltage across the input terminals, a selectable reference voltage and a feedback signal measured with respect to the inductive element.

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