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公开(公告)号：EP4387070A1
公开(公告)日：2024-06-19
申请号：EP22213679.8
申请日：2022-12-15
CPC分类号： H02M3/01 , H02M3/33571 , H02M3/33523 , H02M1/0009 , H05B45/39
摘要： A resonant hybrid flyback converter (10) for a LED-based load (13c) is provided. Said resonant hybrid flyback converter (10) comprises a half-bridge (11) comprising a high-side switch (11a) and a low-side switch (11b), a flyback resonant tank (12) comprising a transformer with a primary side (15a) and a secondary side (15b), and a processing unit (14). In this context, the half-bridge (11) is configured to supply said primary side (15a). Additionally, the secondary side (15b) is configured to supply the LED-based load (13c). Furthermore, the processing unit (14) is configured to receive at least one feedback signal based on a sensed secondary side current with respect to the secondary side (15b). Moreover, the processing unit (14) is configured to control an on-time of the low-side switch (11b) and/or an on-time of the high-side switch (11a) on the basis of the at least one feedback signal.
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公开(公告)号：EP4247120A1
公开(公告)日：2023-09-20
申请号：EP22162668.2
申请日：2022-03-17
发明人： Maldoner, Jakob , Marte, Patrick , Dimic, Nikola
IPC分类号： H05B45/375 , H02M3/158
摘要： A synchronous buck converter for supplying a LED load comprises:
- a high side switch and a low side switch connected in series,
- an inductor connected to the midpoint of these switches, and
- a control circuitry controlling the alternate switching operation of the two switches,
wherein the switches are controlled such that there are time periods in which a negative current is flowing through said low side switch,
wherein the control circuitry is supplied with a feedback signal indicating the level of the negative current and is arranged to issue a switching-off command to the low side switch as soon as the feedback signal reaches or crosses a threshold value,
wherein a least one feedback from the LED load is fed back to the control circuitry, and
wherein the at least one feedback signal comprises at least one of LED voltage and LED current.
The control circuitry is arranged to adapt its threshold value depending on the at least one feedback signal.-
公开(公告)号：EP4344035A1
公开(公告)日：2024-03-27
申请号：EP22196463.8
申请日：2022-09-20
摘要： A resonant hybrid flyback converter (100) with overcurrent detection and/or protection for LED lighting means (34) is provided. Said resonant hybrid flyback converter (100) comprises a half-bridge (10), and a flyback resonant tank (20) comprising a transformer with a primary side (61) and a secondary side (62). In this context, the half-bridge (10) is configured to supply said primary side (61). In addition to this, the resonant hybrid flyback converter (100) comprises a control unit (70) controlling the operation of switches (11, 12) of the half-bridge (10) and being supplied with a feedback signal (sensing) from a sensing circuit (R shunt ) configured to sense a primary-side current in the flyback resonant tank (20).
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公开(公告)号：EP3907870A1
公开(公告)日：2021-11-10
申请号：EP20172718.7
申请日：2020-05-04
发明人： Maldoner, Jakob , Marte, Patrick , Walch, Patrick
摘要： A resonant converter (30) supplies a load. The resonant converter (30) comprises a primary converter side (31), comprising a converter switching circuit, a secondary converter side (32), and a controller (33). The controller (33) is configured to operate the converter switching circuit using pulse width modulation, for regulating a power transfer from the primary converter side (31) to the secondary converter side (32). The resonant converter (30) comprises an overshoot protection circuit (34) connected to the primary converter side (31) and/or to the controller (33). The overshoot protection circuit (34) is configured to, and as switch-off event, effectively stop a power transfer from the primary converter side (31) to the secondary converter side (32) at the end of a pulse width modulation pulse.
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公开(公告)号：EP4387395A1
公开(公告)日：2024-06-19
申请号：EP22213667.3
申请日：2022-12-15
IPC分类号： H05B45/14 , H05B45/385
CPC分类号： H05B45/14 , H05B45/385 , H05B45/39 , H02M3/33571 , H02M3/33523 , H02M3/01 , H05B45/59
摘要： A resonant hybrid flyback converter (10) for a LED-based load (13c) is provided. Said resonant hybrid flyback converter (10) comprises a half-bridge (11) comprising a high-side switch (11a) and a low-side switch (11b), a flyback resonant tank (12) comprising a transformer with a primary side (15a) and a secondary side (15b), and a processing unit (14). In this context, the half-bridge (11) is configured to supply said primary side (15a), wherein the secondary side (15b) is configured to supply the LED-based load (13c). Additionally, the processing unit (14) is configured to sense a LED voltage with respect to the LED-based load (13c) and/or a half-bridge current with respect to the primary side (15a). In further addition to this, the processing unit (14) is configured to control an on-time of the low-side switch (11b) on the basis of the LED voltage and/or an on-time of the high-side switch (11a) on the basis of a peak detection with respect to the half-bridge current.
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公开(公告)号：EP4387069A1
公开(公告)日：2024-06-19
申请号：EP22213675.6
申请日：2022-12-15
CPC分类号： H02M3/01 , H02M3/33571 , H02M3/33523 , H02M1/0009 , H05B45/39
摘要： A resonant hybrid flyback converter (10) for a LED-based load (13c) is provided. Said resonant hybrid flyback converter (10) comprises a half-bridge (11) comprising a high-side switch (11a) and a low-side switch (11b), a flyback resonant tank (12) comprising a transformer with a primary side (15a) and a secondary side (15b), and a processing unit (14). In this context, the half-bridge (11) is configured to supply said primary side (15a), wherein the secondary side (15b) is configured to supply the LED-based load (13c). Additionally, the processing unit (14) is configured to sense a LED current with respect to the LED-based load (13c). In further addition to this, the processing unit (14) is configured to control an on-time of the low-side switch (11b) and/or an on-time of the high-side switch (11a) on the basis of the LED current.
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公开(公告)号：EP3886537A1
公开(公告)日：2021-09-29
申请号：EP20165072.8
申请日：2020-03-24
发明人： Maldoner, Jakob
摘要： The invention relates to an isolated primary side switched converter (100), comprising a galvanic isolation stage (105) separating a primary side (101) and a secondary side (103) of the converter (100), a secondary side winding (107) of the isolation stage (105), wherein the secondary side winding (107) is coupled to a primary side winding, and wherein the secondary side winding (107) comprises a center tap, a first terminal (T1), a second terminal (T2) and a third terminal (T3) for connecting an LED load (LED1, LED2) on the secondary side (103) of the converter (100), a rectification circuit (109) on the secondary side (103) of the converter (100), wherein the rectification circuit (109) is configured to set the first terminal (T1) at a first electrical polarity, and to set the second and the third terminal (T2, T3) at a second electrical polarity that is different to the first electrical polarity, wherein the third terminal (T3) is electrically connected to the center tap, and wherein a voltage between the first and the second terminal (T1, T2) is larger than a voltage between the first and the third terminal (T1, T3).
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公开(公告)号：EP3726936A1
公开(公告)日：2020-10-21
申请号：EP20166560.1
申请日：2020-03-30
发明人： Maldoner, Jakob , Netzer, Harald
IPC分类号： H05B45/345
摘要： Gemäß der vorliegenden Erfindung weist ein Betriebsgerät (1) zum Betreiben von Leuchtmitteln (4) einen Resonanzwandler (6) zum Bereitstellen einer Spannung und eines Stroms für den Betrieb des Leuchtmittels (4), eine Messschaltung (7) zum Erfassen des von dem Resonanzwandler (6) an das Leuchtmittel (4) abgegebenen Stroms und eine Steuereinrichtung (8) zum Steuern des Resonanzwandlers (6) auf der Grundlage des erfassten Stroms auf. Der Resonanzwandler (6) besteht zumindest aus einer Halbbrückenschaltung, einem mit der Halbbrückenschaltung gekoppelten Resonanzkreis und einem mit dem Resonanzkreis gekoppelten Übertrager. Die Messschaltung (7) weist einen Transformator und einen Gleichrichter mit zumindest einem steuerbaren Schalter auf, wobei zumindest eine Primärwicklung des Transformators den von der Sekundärwicklung des Übertragers abgegebenen Strom erfasst, der Gleichrichter den von der Sekundärwicklung des Transformators abgegebenen Strom gleichrichtet und der steuerbare Schalter auf der Grundlage von einem zwischen den zwei Schaltern der Halbbrückenschaltung erfassten Signal angesteuert wird.
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公开(公告)号：EP3651553A1
公开(公告)日：2020-05-13
申请号：EP18204500.5
申请日：2018-11-06
摘要： The present invention relates to a module for providing a powered interface, comprising at least one terminal configured to connect a bus having a non-zero DC voltage level in the quiet state; an internal power supply configured to supply a connected bus with DC power, wherein the internal power supply is designed such that it can be switched off; and a control circuitry configured to control the internal power supply, and communicate by receiving and/or sending signals over the bus. The control circuitry of the driver circuit is further configured to carry out the following steps upon receipt of an internal power supply switch-off command: switching off the internal power supply and detecting the bus voltage level at a predetermined time after switching off the internal power supply; and continuing the switched-off state of the internal power supply, when it is determined that the detected bus voltage level is above a threshold value; and switching on again the internal power supply and/or sending out a message over the bus, when it is determined that the detected bus voltage level at the predetermined time after switching off drops to or below the threshold value.
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公开(公告)号：EP4462665A1
公开(公告)日：2024-11-13
申请号：EP23172469.1
申请日：2023-05-10
发明人： Netzer, Harald , Maldoner, Jakob
IPC分类号： H02M3/00 , H02M1/00 , H02M3/335 , H05B45/382
摘要： An isolated, primary side switched resonant converter (100) for supplying an LED load (34) is provided. Said converter (100) comprises an isolation barrier defining a primary side (61) and a secondary side (62), a control circuit arranged for varying the power transmitted by the converter (100) by modulating HF switching operations, preferably with constant frequencies, of at least primary side switch (11, 12) of the converter (100) with LF PWM pulses with variable duty cycle, and means for detecting (24) the falling zero crossing of a current through a primary side resonance circuit of the converter (100). In this context, the converter (100) is void of means for detecting the rising zero crossings of the current through the primary side resonance circuit of the converter (100). In addition to this, the control circuit is arranged to control the trailing high/low transition of each PWM pulse to be during one of the rising/falling zero crossings.
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