CN109302765B - Driving device for lighting device and lighting device - Google Patents
Driving device for lighting device and lighting device Download PDFInfo
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- CN109302765B CN109302765B CN201710610910.5A CN201710610910A CN109302765B CN 109302765 B CN109302765 B CN 109302765B CN 201710610910 A CN201710610910 A CN 201710610910A CN 109302765 B CN109302765 B CN 109302765B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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Abstract
The invention relates to a driving device for a lighting device, comprising: a controller for providing a first drive signal having a first duty cycle; a regulator connected to the controller, the regulator for regulating the first drive signal and generating a second drive signal having a second duty cycle, wherein the second duty cycle is different from the first duty cycle; and a converter connected to the regulator for generating a desired switching frequency according to the second driving signal and converting the input power supply voltage according to the desired switching frequency, wherein the desired switching frequency is lower than the reference switching frequency. The invention also relates to a lighting device comprising a driving device.
Description
Technical Field
The present invention relates to a driving device, in particular for an LED lighting device, and a lighting device comprising such a driving device.
Background
Drivers for lighting devices, such as drivers for LEDs, need to vary the output current according to the LED lighting module in the application. To change the output current of the driver, the driver is typically implemented in several ways: in the first approach, the driver provides a continuous output current and changes or decreases the average value of the output current. In this way, the output current can be reduced to a minimum of 30% of the rated current, and if the output current is further reduced to less than 30% of the rated current, the lighting performance of the LED module may be deteriorated and the driver may become abnormal due to too small a load. When the current is reduced during dimming or setting the current, the power converter will operate at a higher switching frequency, depending on the output window of the driver and the topology used. The switching frequency of the power converter can become difficult to control.
In addition, the driver can also provide an output current in a PWM mode, and PWM current with a duty ratio is provided by maintaining the amplitude of current pulses, so that the output current of the driver is regulated. In this way the output current can actually be adjusted to 1% of the nominal value, but since the output current pulse amplitude is kept constant, the LED module may be damaged because the current has a high pulse but a low average value. Also with particularly low duty cycles, the driver can become difficult to control, and PWM dimming frequencies of several hundred hertz can cause visible strobing of the lighting device, especially in the case of shooting with a camera. Also, the driver operating in the PWM dimming mode may damage the LED module because the peak current is higher than the average current and the current pulse frequency is in the range of 200-400 hz.
In addition, the first and second modes described above may be used in combination, which is the third adjustment mode. However, this dimming approach is very difficult to control, which inevitably increases the cost and failure rate of the driver. These three ways for regulating the output current of the drive have their own limitations which can make the design of the drive more difficult and can also cause various operational failures of the drive.
Disclosure of Invention
In order to solve the technical problems described above, the present invention provides a novel driving device for a lighting device and a lighting device including the driving device. The drive means can provide an output current of 10% of the rated current or can provide an even lower output current. Also, the output current has a high-frequency ripple capable of improving the lighting performance of the lighting module. Furthermore, since the output current provided by the driving device is continuous and does not have low frequency ripple, the driving device according to the present invention does not cause such an adverse phenomenon as stroboscopic and does not damage the lighting module, such as an LED lighting module.
One of the objects of the invention is achieved by a driving device for a lighting device, comprising: a controller for providing a first drive signal having a first duty cycle; a regulator connected to the controller, the regulator for regulating the first drive signal and generating a second drive signal having a second duty cycle, wherein the second duty cycle is different from the first duty cycle; and a converter connected to the regulator for generating a desired switching frequency according to the second driving signal and converting the input power supply voltage according to the desired switching frequency, wherein the desired switching frequency is lower than the reference switching frequency.
The invention realizes the further adjustment of the switching frequency of the converter by adjusting the duty ratio of the driving signal of the controller, for example, prolonging the turn-off time, so that the switching frequency is not increased, but is lower than the switching frequency formed by the original driving signal of the controller. This can advantageously avoid problems such as design difficulty and cost increase encountered when designing a circuit having a high switching frequency, and the inductive element can be miniaturized and cost reduced, so that the performance of the driving circuit is improved and the cost of the driving circuit is reduced.
According to a preferred embodiment of the invention, the regulator comprises a first regulating circuit for introducing a varying delay to the first drive signal and/or a second regulating circuit for introducing a fixed delay to the first drive signal. In case of artificially increased delay, the peak current must be increased in order to keep the output current unchanged, and the on and/or off time of the switching transistor is increased, which in particular causes the switching frequency to be lowered.
According to a preferred embodiment of the invention, the regulator is further adapted to extend the off-time in at least the first drive signal. By increasing the off time of the drive signal from the controller, thereby delaying the conduction of the switch of the converter, the switching frequency of the converter is reduced, generally improving the efficiency of the circuit.
According to a preferred embodiment of the invention, the regulator further comprises: and the trigger circuit is used for triggering and generating the expected switching frequency of the converter according to the second driving signal. The regulated drive signal from the regulator is processed by a trigger circuit before the drive signal is supplied to the switch of the converter.
According to a preferred embodiment of the invention, the first regulating circuit comprises: the first resistor is connected to a node between a control electrode of the first transistor and a cathode of the first diode through the second resistor, the first capacitor is connected to two ends of the second resistor, and an anode of the first diode is grounded.
According to a preferred embodiment of the invention, the second regulating circuit comprises: the reference electrode of the first transistor is connected to a node between the third resistor and the first end of the second capacitor, the second diode is connected to two ends of the third resistor, and the second end of the second capacitor is grounded.
According to a preferred embodiment of the invention, the trigger circuit comprises an integrated gate driver, wherein the high-level input of the integrated gate driver is connected to the node between the second diode and the first end of the second capacitor and the high-level output of the integrated gate driver is connected to the inverter, or the low-level input of the integrated gate driver is connected to the node between the second diode and the first end of the second capacitor and the low-level output of the integrated gate driver is connected to the inverter.
According to a preferred embodiment of the present invention, the trigger circuit comprises a second transistor, a third diode, a fourth resistor, a fifth resistor, a sixth resistor and a third transistor, wherein the reference electrode of the second transistor is connected to the inverter through the fourth resistor and to the third resistor through the third diode, the control electrode of the second transistor is connected to the working electrode of the third transistor through the sixth resistor, the working electrode of the second transistor is connected to the fifth resistor, and the control electrode of the third transistor is connected to a node between the anode of the second diode and the first end of the second capacitor.
According to a preferred embodiment of the present invention, the controller comprises: an output control loop for providing a feedback signal based on the output; and the control unit is connected to the output control loop and is used for receiving the feedback signal and keeping the output constant according to the feedback signal. When a delay is added to the off time of the drive signal, the output voltage and output current may change, so that closed loop control needs to be provided to ensure that the output voltage and output current are stable and do not change drastically.
According to a preferred embodiment of the invention, the control unit is a buck control unit, a buck-boost control unit or a flyback control unit. The driving device of the invention has stronger compatibility, and can be suitable for not only buck control, but also buck-boost control, flyback control or similar circuits for PWM control.
According to a preferred embodiment of the invention, the converter comprises: and a switching unit for performing a switching operation according to the second driving signal. The driving signal adjusted by the adjuster is transmitted to the switching unit of the inverter to control the switching state of the switching unit at a predetermined period after adjustment, thereby controlling the switching frequency of the inverter within a proper range.
According to a preferred embodiment of the invention, the reference switching frequency is determined based on the first drive signal. The drive device according to the invention can in particular control the switching frequency of the converter within a suitable range, i.e. even lower, than the switching frequency of the converter determined on the basis of the first drive signal, using the adjusted second drive signal.
Another object of the invention is achieved by a lighting device comprising a driving device according to the above description. The lighting performance of the lighting device is further improved, and the manufacturing cost and failure rate of the lighting device are further reduced.
Drawings
The accompanying drawings constitute a part of this specification and are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Like parts are denoted by like reference numerals throughout the drawings. The figure shows:
fig. 1 shows a functional block diagram of a driving device for a lighting device according to an embodiment of the present invention;
fig. 2 shows a circuit schematic of a regulator and inverter of a drive device according to a first embodiment of the invention;
fig. 3 shows a circuit schematic of a regulator of a driving device according to a second embodiment of the present invention;
fig. 4 shows a circuit schematic of a regulator of a driving device according to a third embodiment of the present invention;
fig. 5 shows a circuit schematic of a controller of a driving apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic waveform diagram of a first drive signal provided by a controller and a second drive signal after a fixed delay is introduced by the regulator according to an embodiment of the present invention;
FIG. 7 is a schematic waveform diagram of a first drive signal provided by a controller and a second drive signal after a variable delay is introduced by the regulator in accordance with an embodiment of the present invention; and
fig. 8 shows a schematic diagram of a comparison of a desired switching frequency generated by an inverter with a reference switching frequency of the inverter when no delay is introduced, according to an embodiment of the invention.
Detailed Description
Fig. 1 shows a functional block diagram of a driving device for a lighting device according to an embodiment of the invention. The driving device for a lighting device according to an embodiment of the present invention includes:
a controller 1 for providing a first drive signal having a first duty cycle;
a regulator 2 connected to the controller 1, the regulator 2 for regulating the first drive signal and generating a second drive signal having a second duty cycle, wherein the second duty cycle is different from the first duty cycle; and
a converter 3 connected to the regulator 2 for generating a desired switching frequency based on the second drive signal and converting the input supply voltage U based on the desired switching frequency I Wherein the desired switching frequency is lower than the reference switching frequency.
As shown in fig. 1, the regulator 2 is provided between the controller 1 and the inverter 3, and the driving signal from the controller 1 is adjusted and then transferred to the inverter 3, whereby the inverter 3 forms a desired switching frequency according to the adjusted driving signal and converts the power supply voltage into a predetermined output voltage U for the load O . The regulator 2 may advantageously adjust the drive signal from the controller 1 such that the switching frequency of the converter 3 is controlled within a predetermined suitable range, and this switching frequency is lower than the switching frequency determined based on the original drive signal of the controller 1. This allows the converter 3 to operate at a lower switching frequency without causing problems such as increased difficulty in circuit design and increased cost due to the high switching frequency.
Fig. 2 shows a schematic circuit diagram of a regulator 2 and a converter 3 of a drive device according to a first embodiment of the invention. The regulator 2 is connected upstream of the inverter 3, and the driving signal processed by the regulator 2 is supplied to the inverter 3. The regulator 2 comprises a first regulating circuit 21 and/or a second regulating circuit 22, wherein fig. 2 schematically shows the regulator 2 comprising the first regulating circuit 21 and the second regulating circuit 22.
The first adjusting circuit 21 is arranged to introduce a varying delay to the first drive signal from the controller 1 to form an adjusted second drive signal. In contrast thereto, the second adjusting circuit 22 is arranged to introduce a fixed delay to the first drive signal from the controller 1 to form an adjusted second drive signal. The delay of the second adjusting circuit 22 is determined by the third resistor R3 and the second capacitor C2, and when only a fixed delay is used, the third resistor R3 and the second capacitor C2 can set a suitable delay time, and when, for example, a varying delay is used at the same time, the third resistor R3 and the second capacitor C2 can set a complementary delay time. The regulator 2 is thus in particular able to lengthen the off-time of at least the first drive signal from the controller 1, which results in a reduced switching frequency of the converter 3. In other preferred embodiments, the regulator 2 is also capable of extending the on-time as well as the off-time of the first drive signal from the controller 1, thereby advantageously reducing the switching frequency of the converter 3.
In the preferred embodiment shown in fig. 2, the first regulating circuit 21 comprises a first resistor R1, a second resistor R2, a first transistor T1, a first capacitor C1 and a first diode D1. The second regulating circuit 22 includes a third resistor R3, a second capacitor C2, and a second diode D2. The first transistor T1 may be implemented as a MOSFET, a transistor, an IGBT, or a similar switching device. In the embodiment shown in fig. 2, the first transistor T1 is implemented as a transistor. The working electrode of the first transistor T1 is connected to a node between the first resistor R1 and the second resistor R2, and is connected to a first end of the first capacitor C1 through the node. The second terminal of the first capacitor C1 is connected to the cathode of the first diode D1, and the anode of the first diode D1 is connected to ground. While the control electrode of the first transistor T1 is connected to the cathode of the first diode D1. The reference electrode of the first transistor T1 is connected to a node between the third resistor R3 and the first end of the second diode D2, and is connected to the anode of the second diode D2 through the node. The second diode D2 is connected across the third resistor R3. The second segment of the second diode D2 is connected to ground.
Those skilled in the art can vary the configuration of the regulator 2 depending on the particular application within the spirit and principles of the present invention. In particular, when the regulator 2 applies the first regulating circuit 21 in order to achieve a varying delay, the second regulating circuit 22 may leave only the second diode D2 in the second regulating circuit 22 and omit other components, such as the third resistor R3 and the second capacitor C2; when the regulator 2 applies the second regulating circuit 22 for achieving a fixed delay, the entire first regulating circuit 21 may be omitted. In other words, in an alternative embodiment, the second diode D2 and its connected Drive1 terminal are common parts of the first regulating circuit 21 and the second regulating circuit 22, and can be shared by the first regulating circuit 21 and the second regulating circuit 22.
The regulator 2 further comprises a triggering circuit 23, which triggering circuit 23 is connected downstream of the second regulating circuit 22 and upstream of the converter 3 in the embodiment shown in fig. 2. The trigger circuit 23 can trigger the inverter 3 to generate a desired switching frequency based on the adjusted second drive signal. The trigger circuit 23 includes an integrated gate driver U1, which integrated gate driver U1 may be implemented as a FAN7380 integrated chip. The integrated gate driver U1 includes, among other things, a high-level input pin and a high-level output pin. The reference electrode of the first transistor T1 of the first regulation circuit 21 and the anode of the second diode D2 of the second regulation circuit 22 may be connected to the high-level input pin, and the integrated gate driver U1 generates an output driving signal output from the high-level output pin according to the driving signal input from the high-level input pin. The output drive signal is in turn led to a switching unit 31 of the downstream converter 3, which switching unit 31 performs switching operations in accordance with the drive signal and generates a corresponding switching frequency. The switching unit 31 of the converter 3 may be implemented as a MOSFET, a triode, an IGBT or a similar switching device. In the embodiment shown in fig. 2, the switching unit 31 is implemented as a MOSFET, and the drive signal is transferred to the gate of the MOSFET as a control electrode.
Fig. 3 shows a circuit schematic of a regulator 2 of a drive device according to a second embodiment of the invention. Compared to the first embodiment shown in fig. 2, the regulator 2 according to the second embodiment has a differently configured trigger circuit 23, wherein the low-level input pin and the low-level output pin of the integrated gate driver U1 of the trigger are used. The reference electrode of the first transistor T1 of the first adjusting circuit 21 and the anode of the second diode D2 of the second adjusting circuit 22 are connected to the low-level input pin of the integrated gate driver U1, and the integrated gate driver U1 generates an output driving signal output from the low-level output pin according to the driving signal input from the low-level input pin. The output drive signal is in turn led to a switching unit 31 of the downstream converter 3. In this embodiment, the same driver as the integrated gate driver U1 shown in FIG. 2 may be employed, but a different pin of the driver is used.
Fig. 4 shows a circuit schematic of a regulator 2 of a drive device according to a third embodiment of the invention. The regulator 2 according to the third embodiment employs a flip-flop having a different circuit design compared to the first and second embodiments shown in fig. 2 and 3, respectively. The flip-flop comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a third diode D3, a second transistor T2 and a third transistor T3, wherein the second transistor T2 is implemented as a transistor and the third transistor T3 is implemented as a MOSFET. The reference electrode of the second transistor T2 is connected to the node between the anode of the third diode D3 and the fourth resistor R4 and to the switching unit 31 of the downstream converter 3 via the fourth resistor R4. The working electrode of the second transistor T2 is connected to the cathode of the third diode D3. The control electrode of the second transistor T2 is connected to the node between the fifth resistor R5 and the sixth resistor R6, and is connected to the working electrode of the third transistor T3 through the sixth resistor R6. The control electrode of the third transistor T3 is connected to the anode of the second diode D2 of the second regulator 2 and to the reference electrode of the first transistor T1 of the first regulator 2, and the reference electrode of the third transistor T3 is grounded.
Fig. 5 shows a circuit schematic of the controller 1 of the driving apparatus according to an embodiment of the present invention. The controller 1 comprises an output control loop 11 and a buck control unit 12, wherein the buck control unit 12 has a control device U2, for example implemented as an L6562A integrated chip, the buck control unit 12 is connected to the Drive1 terminal of the second regulating circuit 22 as shown in fig. 2 by a pin Drive1, and the buck control unit 12 is connected to the MULT terminal of the first regulating circuit 21 by a pin MULT. The voltage of the MULT pin of the buck control unit 12 determines the delay time period introduced into the first drive signal from the controller 1. Furthermore, the output control loop 11 has a first input LED, which is connected to the LED terminal of the converter 3 as shown in fig. 2, and a second input led_rtn, which is connected to the led_rtn terminal of the converter 3. The second input terminal led_rtn is used for peak current detection and average current detection. The output control loop 11 thus obtains the output of the drive means by means of the first and second input led_rtn and provides feedback to the control unit, the output control loop 11 and the control unit 12 constituting a closed-loop control to ensure that the output voltage and the output current of the converter 3 do not change.
Fig. 6 shows waveforms of the first driving signal S1 and the second driving signal S2 after a fixed delay is introduced by the regulator, which are provided by the controller according to an embodiment of the present invention. The on-time Ton and the off-time Toff of the first driving signal S1 and the second driving signal S2 are exemplarily shown in the figure. The corresponding reference switching frequency can be obtained by introducing the on-time Ton and the off-time Toff before the delay, and the corresponding desired switching frequency can be obtained by introducing the on-time Ton and the off-time Toff after the delay. The off-time Toff of the second driving signal S2 subjected to the fixed delay is prolonged as compared to the first driving signal S1. The desired switching frequency of the converter after introducing the fixed delay is lower than the reference switching frequency compared to the reference switching frequency of the converter before introducing the delay.
Fig. 7 shows waveforms of the first driving signal S1 and the second driving signal S2 after the variable delay is introduced by the regulator, which are provided by the controller according to the embodiment of the present invention. The on-time Ton and the off-time Toff of the first driving signal S1 and the second driving signal S2 are exemplarily shown in the figure. The delay of the first drive signal S1 introduced in fig. 7 is larger and variable compared to fig. 6, which in particular enables a desired switching frequency lower than the switching frequency shown in fig. 6 to be obtained. In other embodiments not shown, the introduced delay may be different from that shown in fig. 6 and 7, for example, two, three, or more times greater than that shown in fig. 6. In fig. 7, the off time Toff of the second driving signal S2 subjected to the varying delay is delayed as compared to the first driving signal S1. The desired switching frequency of the converter after introducing the varying delay is lower than the reference switching frequency compared to the reference switching frequency of the converter before introducing the delay.
Fig. 8 shows a schematic diagram of a comparison of a desired switching frequency generated by an inverter with a reference switching frequency of the inverter when no delay is introduced, according to an embodiment of the invention. The horizontal axis of FIG. 8 shows the output voltage U of the driving device O The vertical axis represents the switching frequency Fsw generated by the converter. Fig. 8 shows in particular the switching frequency generated by the converter before the delay is introduced (indicated by the dashed line) and the switching frequency of the converter after the delay is introduced (indicated by the solid line) corresponding to different output currents, e.g. 300mA, 500mA, 700 mA. After introducing the delay, the desired switching frequency of the converter may be significantly reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Reference numerals and signs
1. Controller for controlling a power supply
2. Regulator
3. Inverter
100. Driving device
21. First regulating circuit
22. Second regulating circuit
11. Output control loop
12. Control unit
31. Switch unit
R1 first resistor
R2 second resistor
R3 third resistor
R4 fourth resistor
R5 fifth resistor
R6 sixth resistor
C1 First capacitor
C2 Second capacitor
T1 first transistor
T2 second transistor
T3 third transistor
D1 First diode
D2 Second diode
D3 Third diode
U1 integrated gate driver
U2 control device
S1 first drive signal
S2 second drive signal
U I Input voltage
U O Output voltage
Ton on time
Toff off time.
Claims (9)
1. A driving device (100) for a lighting device, comprising:
a controller (1) for providing a first drive signal (S1) having a first duty cycle;
-a regulator (2) connected to the controller (1), the regulator (2) being adapted to regulate the first drive signal (S1) and to generate a second drive signal (S2) having a second duty cycle, wherein the second duty cycle is different from the first duty cycle; and
-a converter (3) connected to the regulator (2) for generating a desired switching frequency in dependence of the second drive signal (S2) and for converting an input supply voltage (U) in dependence of the desired switching frequency I ) Wherein the desired switching frequency is lower than a referenceA switching frequency, wherein the regulator (2) comprises a first regulating circuit (21) and a second regulating circuit (22), wherein the first regulating circuit (21) is used for introducing a varying delay to the first drive signal (S1), the second regulating circuit (22) is used for introducing a fixed delay to the first drive signal (S1),
wherein the regulator (2) further comprises a triggering circuit (23) for triggering generation of the desired switching frequency of the converter (3) in dependence of the second drive signal (S2), wherein the first regulating circuit (21) comprises: a first resistor (R1), a second resistor (R2), a first capacitor (C1), a first transistor (T1) and a first diode (D1), wherein the first resistor (R1) is connected to a node between a control electrode of the first transistor (T1) and a cathode of the first diode (D1) through the second resistor (R2), the first capacitor (C1) is connected to two ends of the second resistor (R2), and an anode of the first diode (D1) is grounded,
wherein the second regulating circuit (22) comprises: a third resistor (R3), a second capacitor (C2) and a second diode (D2), wherein the reference electrode of the first transistor (T1) is connected to a node between the third resistor (R3) and the first end of the second capacitor (C2), the second diode (D2) is connected to both ends of the third resistor (R3), and the second end of the second capacitor (C2) is grounded.
2. The drive device (100) according to claim 1, wherein the regulator (2) is further adapted to extend an off-time (Toff) in at least the first drive signal (S1).
3. The drive device (100) according to claim 1, wherein the trigger circuit (23) comprises: an integrated gate driver (U1), wherein,
the high input of the integrated gate driver (U1) is connected to a node between the second diode (D2) and the first end of the second capacitor (C2), and the high output of the integrated gate driver (U1) is connected to the converter (3), or,
the low-level input of the integrated gate driver (U1) is connected to a node between the second diode (D2) and the first end of the second capacitor (C2), and the low-level output of the integrated gate driver (U1) is connected to the converter (3).
4. The drive device (100) according to claim 1, wherein the trigger circuit (23) comprises: a second transistor (T2), a third diode (D3), a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6) and a third transistor (T3), wherein,
the reference electrode of the second transistor (T2) is connected to the converter (3) via the fourth resistor (R4) and to the third resistor (R3) via the third diode (D3), the control electrode of the second transistor (T2) is connected to the working electrode of the third transistor (T3) via a sixth resistor (R6), the working electrode of the second transistor (T2) is connected to the fifth resistor (R5), and the control electrode of the third transistor (T3) is connected to a node between the anode of the second diode (D2) and the first end of the second capacitor (C2).
5. The drive device (100) according to any one of claims 1-4, wherein the controller (1) comprises:
an output control loop (11) for controlling the output (U) of the driving device O ) Providing a feedback signal;
-a control unit (12) connected to the output control loop (11) for receiving the feedback signal and keeping the output constant in dependence of the feedback signal.
6. The drive device (100) according to claim 5, wherein the control unit (12) is a buck control unit, a buck-boost control unit or a flyback control unit.
7. The drive device (100) according to any one of claims 1-4, wherein the converter (3) comprises: and a switching unit (31) for performing a switching operation according to the second driving signal (S2).
8. The drive device (100) according to any one of claims 1-4, wherein the reference switching frequency is determined based on the first drive signal (S1).
9. A lighting device, characterized by comprising a driving device (100) according to any one of claims 1-8.
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| CN201710610910.5A CN109302765B (en) | 2017-07-25 | 2017-07-25 | Driving device for lighting device and lighting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710610910.5A CN109302765B (en) | 2017-07-25 | 2017-07-25 | Driving device for lighting device and lighting device |
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| CN109302765B true CN109302765B (en) | 2023-05-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201557044U (en) * | 2009-10-30 | 2010-08-18 | 上海鹰泰德创电器电子有限公司 | Frequency limited circuit capable of controlling power factor correcting circuit via critical current |
| CN102781139A (en) * | 2011-05-12 | 2012-11-14 | 松下电器产业株式会社 | Lighting device for lighting solid-state light source and illumination apparatus using same |
| CN105207502A (en) * | 2014-06-12 | 2015-12-30 | 电力集成公司 | Line ripple compensation for shimmerless led driver |
| CN106163012A (en) * | 2016-08-26 | 2016-11-23 | 宁波赛耐比光电科技股份有限公司 | A kind of constant voltage adjusting control circuit of band hysteresis |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8228051B2 (en) * | 2006-05-02 | 2012-07-24 | International Rectifier Corporation | Switched mode power supply with frequency modulation control |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201557044U (en) * | 2009-10-30 | 2010-08-18 | 上海鹰泰德创电器电子有限公司 | Frequency limited circuit capable of controlling power factor correcting circuit via critical current |
| CN102781139A (en) * | 2011-05-12 | 2012-11-14 | 松下电器产业株式会社 | Lighting device for lighting solid-state light source and illumination apparatus using same |
| CN105207502A (en) * | 2014-06-12 | 2015-12-30 | 电力集成公司 | Line ripple compensation for shimmerless led driver |
| CN106163012A (en) * | 2016-08-26 | 2016-11-23 | 宁波赛耐比光电科技股份有限公司 | A kind of constant voltage adjusting control circuit of band hysteresis |
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