CN216162892U - Light source driving circuit, light source driving device and lamp - Google Patents
Light source driving circuit, light source driving device and lamp Download PDFInfo
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- CN216162892U CN216162892U CN202121073239.3U CN202121073239U CN216162892U CN 216162892 U CN216162892 U CN 216162892U CN 202121073239 U CN202121073239 U CN 202121073239U CN 216162892 U CN216162892 U CN 216162892U
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Abstract
The application is applicable to the technical field of lighting, provides a light source drive circuit, light source drive arrangement and lamps and lanterns, and light source drive circuit includes: rectifier filter module, the current regulation module, silicon controlled rectifier compensation module, constant voltage switch power module and direct current conversion module, rectifier filter module carries out rectifier filter to the chopper alternating current of silicon controlled rectifier output, the direct current that the output corresponds, the current regulation module is according to the direct current's of conduction angle regulation size of silicon controlled rectifier, silicon controlled rectifier compensation module generates silicon controlled rectifier compensation signal according to the conduction angle of silicon controlled rectifier and adjusts in order to the constant voltage switch power signal of constant voltage switch power module output, direct current conversion module generates multichannel light source drive signal according to multichannel pulse width modulation signal and constant voltage switch power signal, light with driving a plurality of light source modules, thereby can compatible silicon controlled rectifier adjust luminance the colour when single-stage constant voltage output connects a plurality of light source modules.
Description
Technical Field
The application belongs to the technical field of lighting, and particularly relates to a light source driving circuit, a light source driving device and a lamp.
Background
At present, an LED driver is divided into two modes according to output types, wherein one mode is a constant current output mode, the other mode is a constant voltage output mode, and the loads of the drivers in the two modes are LED lamps. LED lamps have their own characteristics-requiring a relatively stable current to flow through the LED lamp. If the current flowing through the LED lamp changes, the brightness of the light emitted by the LED lamp changes, so that a constant-current output mode LED driver capable of adjusting the output current, namely a constant-current dimmable LED driver, is generated. The constant-current dimming control circuit mainly realizes the output current adjustable function by collecting and feeding back the input voltage and the output current of a product, so that most of the existing silicon controlled rectifier application schemes can only be applied to a constant-current adjusting circuit.
However, more and more lighting loads need to be controlled by constant voltage, and the existing single-stage constant voltage output switch scheme cannot realize dimming and color mixing compatible with silicon controlled rectifier when being connected with a plurality of LED lamps.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present application provides a light source driving circuit, a light source driving device and a lamp, which can solve the problem that when a conventional single-stage constant voltage output switch scheme is connected to a plurality of LED lamps, dimming and color mixing cannot be achieved by compatible thyristors.
The embodiment of this application provides a first aspect provides a light source drive circuit, is connected with silicon controlled rectifier and a plurality of light source module, light source drive circuit includes:
the rectification filtering module is used for accessing the silicon controlled rectifier, performing rectification filtering processing on chopped AC output by the silicon controlled rectifier and outputting corresponding DC;
the current adjusting module is connected with the rectifying and filtering circuit and used for adjusting the direct current according to the conduction angle of the controllable silicon;
the silicon controlled rectifier compensation module is connected with the current regulating circuit and used for generating a silicon controlled rectifier compensation signal according to the conduction angle of the silicon controlled rectifier;
the constant voltage switch power supply module is connected with the rectification filter module and the silicon controlled rectifier compensation module and used for receiving the direct current and the silicon controlled rectifier compensation signals and outputting constant voltage switch power supply signals according to the direct current and the silicon controlled rectifier compensation signals;
and the direct current conversion module is connected with the constant voltage switch power supply module and the plurality of light source modules, and is used for receiving the constant voltage switch power supply signal and generating a plurality of light source driving signals according to the plurality of pulse width modulation signals and the constant voltage switch power supply signal so as to drive the plurality of light source modules to be lightened.
In one embodiment, the light source driving circuit further includes:
and the main control module is used for providing a plurality of paths of pulse width modulation signals.
In one embodiment, the light source driving circuit further includes:
the preceding-stage voltage detection module is connected with the direct current conversion module and the main control module, and is used for detecting an input voltage signal of the direct current conversion module and generating a preceding-stage voltage detection signal according to the input voltage signal;
the main control module is further used for adjusting the plurality of light source driving signals according to the preceding-stage voltage detection signal.
In one embodiment, the light source driving circuit further includes:
and the master control power supply module is respectively connected with the direct current conversion module and the master control module and is used for receiving the input voltage signal of the direct current conversion module and carrying out voltage conversion on the input voltage signal to generate a master control power supply signal so as to supply power to the master control module.
In one embodiment, the light source driving circuit further includes:
the dial switch module is connected with the main control module and used for generating a color temperature gear switching signal according to a dial instruction input by a user;
the main control module is further used for adjusting the plurality of light source driving signals according to the color temperature gear switching signal so as to adjust the color temperature of the plurality of light source modules.
In one embodiment, the rectifying and filtering module comprises:
the first anti-interference unit is connected with the silicon controlled rectifier and used for eliminating electromagnetic interference of the external environment on the chopped wave alternating current;
the first rectifying unit is connected with the anti-interference unit and used for rectifying the chopped alternating current to generate the direct current;
and the second anti-interference unit is connected with the first rectifying unit and is used for eliminating electromagnetic interference of the direct current from the outside.
In one embodiment, the constant voltage switching power supply module includes:
the constant voltage driving unit is connected with the rectifying and filtering module and used for outputting a constant voltage switching power supply signal according to the direct current and the silicon controlled rectifier compensation signal;
and the sampling feedback unit is connected with the constant voltage driving unit and used for sampling the constant voltage switch power supply signal and adjusting the constant voltage switch power supply signal according to a sampling result.
In one embodiment, the dc conversion module includes:
the second rectifying unit is connected with the constant voltage switch power supply module and used for rectifying the constant voltage switch power supply signal to generate an input voltage signal;
the plurality of direct current driving units are connected with the second rectifying unit and the main control module and used for receiving the plurality of paths of pulse width modulation signals provided by the main control module and respectively generating a plurality of paths of light source driving signals according to the plurality of paths of pulse width modulation signals;
the plurality of direct current driving units are connected with the plurality of light source modules in a one-to-one correspondence mode.
The second aspect of the embodiments of the present application also provides a light source driving apparatus, including the light source driving circuit as described in any one of the above.
The third aspect of the embodiments of the present application further provides a lamp including the light source driving circuit as described in any one of the above.
The embodiment of the application provides a light source drive circuit, light source drive arrangement and lamps and lanterns, light source drive circuit includes: rectifier filter module, the current regulation module, silicon controlled rectifier compensation module, constant voltage switch power module and direct current conversion module, rectifier filter module carries out rectifier filter to the chopper alternating current of silicon controlled rectifier output, the direct current that the output corresponds, the current regulation module is according to the direct current's of conduction angle regulation size of silicon controlled rectifier, silicon controlled rectifier compensation module generates silicon controlled rectifier compensation signal according to the conduction angle of silicon controlled rectifier and adjusts in order to the constant voltage switch power signal of constant voltage switch power module output, direct current conversion module generates multichannel light source drive signal according to multichannel pulse width modulation signal and constant voltage switch power signal, light with driving a plurality of light source modules, thereby can compatible silicon controlled rectifier adjust luminance the colour when single-stage constant voltage output connects a plurality of light source modules.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light source driving circuit according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a light source driving circuit according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a light source driving circuit according to still another embodiment of the present application;
fig. 4 is a schematic structural diagram of a light source driving circuit according to still another embodiment of the present application;
fig. 5 is a schematic structural diagram of a light source driving circuit according to still another embodiment of the present application;
fig. 6 is a schematic structural diagram of a rectifying and filtering module according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a light source driving circuit according to still another embodiment of the present application;
fig. 8 is a schematic structural diagram of a light source driving circuit according to still another embodiment of the present application;
fig. 9 is a schematic structural diagram of a light source driving circuit according to still another embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
The embodiment of the application provides a light source drive circuit, and light source drive circuit is connected with silicon controlled rectifier 10 and a plurality of light source module, and it is shown with reference to fig. 1 that light source drive circuit includes: the circuit comprises a rectification filter module 20, a current regulation module 30, a silicon controlled rectifier compensation module 40, a constant voltage switch power supply module 50 and a direct current conversion module 60.
The rectification filtering module 20 is connected to the silicon controlled rectifier 10 and is used for performing rectification filtering processing on chopped alternating current output by the silicon controlled rectifier 10 and outputting corresponding direct current; the current adjusting module 30 is connected with the rectifying and filtering circuit and used for adjusting direct current according to the conduction angle of the controllable silicon 10; the silicon controlled rectifier compensation module 40 is connected with the current regulating circuit and the constant voltage switch power supply module 50 and is used for generating a silicon controlled rectifier 10 compensation signal according to the conduction angle of the silicon controlled rectifier 10; the constant voltage switch power supply module 50 is connected with the rectification filter module 20 and the silicon controlled rectifier compensation module 40, and is used for receiving the direct current and the silicon controlled rectifier 10 compensation signal and outputting a constant voltage switch power supply signal according to the direct current and the silicon controlled rectifier 10 compensation signal; the dc conversion module 60 is connected to the constant voltage switching power supply module 50 and the plurality of light source modules, and is configured to receive the constant voltage switching power supply signal and generate a plurality of light source driving signals according to the plurality of pulse width modulation signals and the constant voltage switching power supply signal, so as to drive the plurality of light source modules to light up.
Specifically, the rectifier filter module 20 performs rectifier filter processing on the chopped ac power output by the silicon controlled rectifier 10, outputs corresponding dc power, the current adjusting module 30 adjusts the dc power according to the conduction angle of the silicon controlled rectifier 10, the silicon controlled rectifier compensation module 40 generates a silicon controlled rectifier 10 compensation signal according to the conduction angle of the silicon controlled rectifier 10 to adjust the constant voltage switch power supply signal output by the constant voltage switch power supply module 50, the dc conversion module 60 generates multiple paths of light source driving signals according to multiple paths of pulse width modulation signals and the constant voltage switch power supply signal, so as to drive multiple light source modules to be lit, and thus, when the single-stage constant voltage output is connected with the multiple light source modules, the silicon controlled rectifier 10 can be compatible for dimming and color mixing.
In one embodiment, referring to fig. 2, the light source driving circuit further includes a main control module 80, and the main control module 80 is configured to provide multiple pulse width modulation signals.
In this embodiment, the main control module 80 outputs multiple pulse width modulation signals to the dc conversion module 60, so as to adjust multiple light source driving signals output by the dc conversion module 60.
In one embodiment, referring to fig. 3, the light source driving circuit further includes a pre-stage voltage detection module 91, wherein the pre-stage voltage detection module 91 is connected to the dc conversion module 60 and the main control module 80, and is configured to detect an input voltage signal of the dc conversion module 60 and generate a pre-stage voltage detection signal according to the input voltage signal; the main control module 80 is further configured to adjust the multiple light source driving signals according to the previous-stage voltage detection signal.
In this embodiment, the front stage voltage detection module 91 is configured to detect an input voltage of the dc conversion module 60 and generate a front stage voltage detection signal to the main control module 80, and the main control module 80 adjusts an output of the dc conversion module 60 based on the front stage voltage detection signal.
In an embodiment, referring to fig. 4, the light source driving circuit further includes a main control power supply module 92, where the main control power supply module 92 is connected to the dc conversion module 60 and the main control module 80, and is configured to receive an input voltage signal of the dc conversion module 60 and perform voltage conversion on the input voltage signal to generate a main control power supply signal, so as to supply power to the main control module 80.
In this embodiment, the main control power supply module 92 obtains power from the dc conversion module 60, and converts the obtained voltage signal into a voltage required by the main control module 80.
In one embodiment, referring to fig. 5, the light source driving circuit further includes a dial switch module 93, where the dial switch module 93 is connected to the main control module 80 and configured to generate a color temperature shift switching signal according to a dial instruction input by a user; the main control module 80 is further configured to adjust the multiple light source driving signals according to the color temperature shift switching signal, so as to adjust the color temperatures of the multiple light source modules.
In this embodiment, the dial switch module 93 may output color temperature shift switching signals with different voltages according to the dial instruction, and the main control module 80 selects a corresponding pulse width modulation signal to output based on the voltage value of the received color temperature shift switching signal, so as to control the dc conversion module 60 to output a corresponding light source driving signal to adjust the color temperature of the light source module.
In one embodiment, referring to fig. 6, the rectifying and filtering module 20 includes: the first anti-interference unit 21, the first rectifying unit 22 and the second anti-interference unit 23.
The first anti-interference unit 21 is connected with the controllable silicon 10 and is used for eliminating electromagnetic interference of the external environment on chopped wave alternating current; the first rectifying unit 22 is connected with the anti-interference unit and used for rectifying the chopped alternating current to generate direct current; the second interference rejection unit 23 is connected to the first rectification unit 22, and is configured to eliminate external electromagnetic interference to the direct current.
In a specific application embodiment, the first anti-jamming unit 21 and the second anti-jamming unit 23 may be both EMI circuits, and are used for performing anti-jamming processing on the input and output voltage signals.
In one embodiment, referring to fig. 7, the constant voltage switching power supply module 50 includes: a constant voltage driving unit 51 and a sampling feedback unit 52.
The constant voltage driving unit 51 is connected with the rectifying and filtering module 20 and is used for outputting a constant voltage switching power supply signal according to the direct current and the silicon controlled rectifier 10 compensation signal; the sampling feedback unit 52 is connected to the constant voltage driving unit 51, and is configured to sample the constant voltage switching power supply signal and adjust the constant voltage switching power supply signal according to a sampling result.
In this embodiment, the constant voltage driving unit 51 may be a constant voltage switching power supply circuit composed of the constant voltage driving chip U1 and its peripheral circuits, and its secondary side is used to connect to the sampling feedback unit 52 as a feedback control.
In one embodiment, referring to fig. 7, the dc conversion module 60 includes: a second rectifying unit 61 and a plurality of dc driving units.
The second rectifying unit 61 is connected with the constant voltage switching power supply module 50 and used for rectifying the constant voltage switching power supply signal to generate an input voltage signal; the plurality of direct current driving units (e.g., the direct current driving unit 621 and the direct current driving unit 62N) are connected to the second rectifying unit 61 and the main control module 80, and are configured to receive the multiple paths of pulse width modulation signals provided by the main control module 80 and generate multiple paths of light source driving signals according to the multiple paths of pulse width modulation signals, respectively; the plurality of direct current driving units are connected with the plurality of light source modules in a one-to-one correspondence mode.
In this embodiment, the second rectifying unit 61 rectifies the constant voltage switching power supply signal output by the input constant voltage switching power supply module 50, and the rectified voltage input signal is converted by the plurality of dc driving units according to the received pulse width modulation signal, and outputs a corresponding voltage signal to drive the corresponding light source module to light up.
In one embodiment, referring to fig. 8, the first interference rejection unit 21 includes: the inductor comprises a first fuse F1, a voltage dependent resistor RV, a first inductor L1, a second inductor L2, a third inductor L3, a fourth inductor L4, a first resistor R1, a second resistor R2 and a first capacitor C1.
Specifically, a first end of the first fuse F1 may be connected to the live line L, a second end of the first fuse F1, a first end of the varistor RV and a first input end of the first inductor L1 are commonly connected, a second end of the first inductor L1, a second end of the varistor RV and the neutral line N are commonly connected, a first output end of the first inductor L1 is connected to a first input end of the second inductor L2, a second input end of the second inductor L2 is connected to a second output end of the first inductor L1, a first output end of the second inductor L2, a first end of the third inductor L3 and a first end of the first resistor R1 are commonly connected, a second output end of the second inductor L2, a first end of the fourth inductor L4 and a first end of the second resistor R2 are commonly connected, a second end of the first resistor R1, a second end of the third inductor L3 and a first end of the first capacitor C1 are commonly connected to a second end of the first inductor L6322, and a second end of the second inductor L4 and a first end of the rectifying unit R4 are commonly connected to a second rectifying unit R6322 and a first end of the second inductor L1, The second terminal of the first capacitor C1 is connected to the first rectifying unit 22.
In this embodiment, the first fuse F1 is used to perform overcurrent protection on the input ac power, so as to prevent the current of the ac power from being too large and damaging the rear-end circuit. The voltage dependent resistor RV carries out overvoltage protection to the alternating current, avoids the voltage of alternating current too big, causes the damage to the circuit of rear end.
The first inductor L1, the second inductor L2, the third inductor L3, the fourth inductor L4, the first resistor R1, the second resistor R2 and the first capacitor C1 form a common mode circuit, and the signal interference capability of the rectification front end is enhanced.
In one embodiment, referring to fig. 8, the first rectifying unit 22 may be a rectifying bridge BD.
In one embodiment, referring to fig. 8, the second anti-interference unit 23 includes: a fifth inductor L5, a third resistor R3, and a fourth resistor R4.
Specifically, a first end of the fifth inductor L5 and a first end of the third resistor R3 are commonly connected to the first rectifying unit 22, a second end of the third resistor R3 is connected to a first end of the fourth resistor R4, and a second end of the fourth resistor R4 and a second end of the fifth inductor L5 are commonly connected to the constant voltage switching power supply module 50.
The fifth inductor L5, the third resistor R3 and the fourth resistor R4 form a common mode circuit for suppressing electromagnetic interference.
In one embodiment, referring to fig. 8, the current regulation module 30 includes: the circuit comprises a second capacitor C2, a fifth resistor R5, a third capacitor C3, a sixth resistor R6, a first switch tube Q1, a first diode D1, a second switch tube Q2, a seventh resistor R7, a second diode D2, an eighth resistor R8, a ninth resistor R9 and a third diode D3.
Specifically, a first end of the second capacitor C2 and a first end of the third capacitor C3 are commonly connected to the rectifying and filtering module 20, a second end of the second capacitor C2 and a first end of the fifth resistor R5 are commonly connected, a second end of the fifth resistor R5 and a first end of the third capacitor C3, a first end of the sixth point resistor and a first end of the first switching tube Q1 are commonly connected to the ground, a control end of the first switching tube Q1, a cathode of the first diode D1, a first end of the third capacitor C3 and a first end of the seventh resistor R7 are commonly connected, a second end of the seventh resistor R7, a first end of the second switching tube Q2 and a cathode of the second diode D2 are commonly connected, a control end of the second switching tube Q2, an anode of the second diode D2, a first end of the eighth resistor R8 and a first end of the ninth resistor 9 are commonly connected, a first end of the eighth resistor R8, a first end of the first switch Q375, a first end of the first diode D3, an anode of the first switch Q375, a first end of the first switch Q5738 and a first end of the first switch Q1 are commonly connected to the first switch tube Q1, A second terminal of the first switching tube Q1 and a second terminal of the sixth resistor R6 are commonly connected to the first rectifying unit 22.
The first switch transistor Q1 may be an N-type MOS transistor, and the second switch transistor Q2 may be a PNP-type triode.
A second end of the ninth resistor R9 is connected to an anode of the third diode D3, and a second end of the sixth resistor R6, a second end of the first switch Q1 and an anode of the first diode D1 of the third diode D3 are commonly connected to the rectifier and filter module 20.
The second capacitor C2, the fifth resistor R5, the third capacitor C3, the sixth resistor R6, the first switch tube Q1, the first diode D1, the second switch tube Q2, the seventh resistor R7, the second diode D2, the eighth resistor R8, the ninth resistor R9 and the third diode D3 form a blanking circuit, corresponding blanking currents are provided when the thyristors are at different angles, and the size of direct current is adjusted according to the conduction angle of the thyristors.
In one embodiment, referring to fig. 8, the thyristor compensation module 40 includes: a tenth resistor R10, an eleventh resistor R11, and a fourth diode D4.
The tenth resistor R10, the eleventh resistor R11 and the fourth diode D4 are sequentially connected in series to the compensation terminal of the constant voltage driving unit.
When the triac dimmer is switched on for dimming at different angles, the potential of the cathode of the fourth diode D4 changes accordingly, so as to linearly change the voltage of the compensation terminal of the constant voltage driving unit 51, i.e., the voltage of the comp pin of the constant voltage driving chip U1, and accordingly, the output voltage changes linearly.
In one embodiment, the constant voltage driving unit 51 includes: the constant voltage driving chip U, a twelfth resistor R, a thirteenth resistor R, a fourteenth resistor R, a fifteenth resistor R, a sixteenth resistor R, a seventeenth resistor R, an eighteenth resistor R, a nineteenth resistor R, a twentieth resistor R, a twenty-first resistor R, a twenty-second resistor R, a twenty-third resistor R, a twenty-fourth resistor R, a twenty-fifth resistor R, a twenty-sixth resistor R, a twenty-seventh resistor R, a twenty-eighth resistor R, a twenty-ninth resistor R, a thirty resistor R, a third switching tube Q, a fourth switching tube Q, a first transformer T, a fourth capacitor C, a fifth capacitor C, a sixth capacitor C, a seventh capacitor C, an eighth capacitor C, a ninth capacitor C, a tenth capacitor C, an eleventh capacitor C, a twelfth capacitor C, a thirteenth capacitor C, a fourteenth capacitor C, a fifth diode D, a sixth diode D, a fifth diode D, a fourth diode D, a fifth diode D, a fourth diode, a fifth diode, a fourth diode, and a fourth diode, and a fourth diode, a seventh diode D7, an eighth diode D8, a ninth diode D9, and a second transformer T2.
Specifically, the anode of the fourth diode D4, the first end of the thirty-first resistor R30 are commonly connected to the voltage feedback pin COMP of the constant voltage driving chip U1, the high voltage input pin VIN of the constant voltage driving chip U1, the first end of the eighteenth resistor R18 and the first end of the sixth capacitor C6 are commonly connected, the first end of the sixth capacitor C6 is commonly connected, the second end of the eighteenth resistor R18, the first end of the sixteenth resistor R16, the first end of the twelfth resistor R12, the first end of the thirteenth resistor R13, the first end of the fourteenth resistor R14, the first end of the fifteenth resistor R15, the first end of the fourth capacitor C4 and the first input end of the first transformer T1 are commonly connected to the rectifier filter module 20, the second end of the sixteenth resistor R16 and the first end of the seventeenth resistor R17 are commonly connected, the second end of the seventeenth resistor R17 and the first end of the fourth switch Q4 are commonly connected to the VDD of the constant voltage driving chip U1, a second end of the twelfth resistor R12, a second end of the thirteenth resistor R13, a second end of the fourteenth resistor R14, a second end of the fifteenth resistor R15, a second end of the fourth capacitor C4 and a cathode of the fifth diode D5 are commonly connected, an anode of the fifth diode D5, a second input terminal of the first transformer T1, a first end of the third switching tube Q92 and a first end of the fifth capacitor C5 are commonly connected, a second end of the third switching tube Q3, a second end of the fifth capacitor C5, a first end of the twenty-first resistor R21, a first end of the twenty-second resistor R20, a first end of the twenty-fifth resistor R25, a first end of the twenty-sixth resistor R26, a first end of the twenty-seventh resistor R27 and a first end of the twenty-eighth resistor R28 are commonly connected, a second end of the twenty-fifth resistor R25, a second end of the twenty-sixth resistor R395, a second end of the seventh resistor R27 and a second end of the twenty-eighth resistor R57324 are commonly connected to a ground, a second end of the twentieth resistor R20, a first end of the seventh capacitor C7, and a current detection pin CS of the constant voltage driving chip U1 are commonly connected, a ground pin GND of the constant voltage driving chip U1 and a second end of the seventh capacitor C7 are commonly connected to ground, a driving pin DRV of the constant voltage driving chip U1 is connected to a first end of a nineteenth resistor R19, a second end of a nineteenth resistor R19, a second end of a twenty-first resistor R21, and a control end of a third switch Q3 are commonly connected, a zero-cross detection pin ZCD of the constant voltage driving chip U1 is connected to a first end of a twenty-second resistor R22, a second end of the twenty-second resistor R22, a first end of a twenty-fourth resistor R24, and a first end of a seventh diode D7 are commonly connected, a second end of a twenty-fourth resistor R24 is connected to a third input end of a first transformer T1, a fourth input end of the first transformer T1 is grounded, a fourth end of a fourth switch Q4, a third end of the twenty-fourth switch Q362R 23, A first end of the eleventh capacitor C11 and a cathode of the seventh diode D7 are commonly connected, a control end of the fourth switching tube Q4, a second end of the twenty-third resistor R23 and a cathode of the sixth diode D6 are commonly connected, and an anode of the sixth diode D6 and a second end of the eleventh capacitor C11 are commonly connected to the ground.
The constant voltage driving chip U1 and its peripheral resistor constitute a constant voltage switching power supply circuit, which outputs a DC voltage signal and feeds back the voltage through the secondary side of the first transformer T1.
Specifically, the constant voltage driving chip U1 may be a BUCK chip or a linear driving chip.
In one embodiment, the third switching transistor Q3 may be an N-type MOS transistor, and the fourth switching transistor Q4 may be a PNP-type transistor.
The second end of the thirty-first resistor R30, the first end of the thirty-first resistor R31 and the first end of the twenty-ninth capacitor C29 are commonly connected to the sampling feedback unit 52, the first end of the eighth capacitor C8, the first end of the ninth capacitor C9 and the first end of the twenty-ninth resistor R29 are commonly connected to the cathode of the fourth diode D4, and the second end of the eighth capacitor C8, the second end of the ninth capacitor C9, the second end of the twenty-ninth resistor R29, the second end of the tenth capacitor C10 and the second end of the thirty-first resistor R31 are commonly connected to ground.
A first output terminal of the first transformer T1, an anode of the eighth diode D8, and an anode of the ninth diode D9 are commonly connected, a cathode of the eighth diode D8, a cathode of the ninth diode D9, a first terminal of the twelfth capacitor C12, a first terminal of the thirteenth capacitor C13, and a first terminal of the fourteenth capacitor C14 are commonly connected to a first input terminal of the second transformer T2, a second output terminal of the first transformer T1, a second terminal of the twelfth capacitor C12, a second terminal of the thirteenth capacitor C13, and a second terminal of the fourteenth capacitor C14 are commonly connected to a second input terminal of the second transformer T2, a first output terminal of the second transformer T2 constitutes a first output terminal DC of the constant voltage switching power supply module 50, and a second output terminal of the second transformer T2 constitutes a second output terminal DC-of the constant voltage switching power supply module 50.
In one embodiment, referring to fig. 8, the sampling feedback unit 52 includes: a fifteenth capacitor C15, a thirty-second resistor R32, a thirty-third resistor R33, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-seventh resistor R37, a thirty-eighth resistor R38, a sixteenth capacitor C16, a seventeenth capacitor C17, an eighteenth capacitor C18, a silicon controlled chip U3 and an optocoupler chip U2.
A first end of a fifteenth capacitor C15 and a first light receiving pin of the optocoupler chip U2 are commonly connected to the constant voltage driving unit 51, a second light receiving pin of the optocoupler chip U2 and a second end of a fifteenth capacitor C15 are commonly connected to ground, a first light emitting pin of the optocoupler chip U2, a first end of a thirty-second resistor R32 and a first end of a thirty-third resistor R33 are commonly connected, a second light emitting pin of the optocoupler chip U2, a second end of the thirty-third resistor R33, a first end of a thirty-sixth resistor R36, a first end of a sixteenth capacitor C16, a first end of a thirty-seventh resistor R37, a first end of an eighteenth capacitor C18 and a cathode end of a thyristor chip U3 are commonly connected, a second end of the thirty-seventh resistor R37 and a first end of a seventeenth capacitor C17 are commonly connected, a second end of a seventeenth capacitor C17, a controlled end of the thyristor U3, a first end of a thirty-eighth resistor R38 and a seventeenth capacitor C17 are commonly connected to the constant voltage driving unit 51, a second light receiving pin of the optocoupler chip U353 and a second light emitting pin of the thyristor chip U353, The second end of the sixteenth capacitor C16, the second end of the thirty-sixth resistor R36, the second end of the thirty-fifth resistor R35 and the second end of the thirty-fourth resistor R34 are connected in common, and the second end of the eighteenth capacitor C18, the anode end of the thyristor chip U3 and the second end of the thirty-eighth resistor R38 are connected in common.
In the present embodiment, the sampling feedback unit 52 samples the primary side of the second transformer T2, and outputs a feedback signal to the constant voltage driver U1 through an optical coupler.
In one embodiment, referring to fig. 9, the second rectifying unit 61 includes: a second fuse F2, a sixth inductor L6, an eighteenth diode D18, a nineteenth diode D19, a twelfth diode D10, and an eleventh diode D11.
Specifically, the eighteenth diode D18, the nineteenth diode D19, the twelfth diode D10, and the eleventh diode D11 constitute a rectifier bridge, and are connected to the second fuse F2 through the sixth inductor L6, and the second fuse F2 is connected to the first output terminal DC + of the constant-voltage switching power supply module 50.
In one embodiment, referring to fig. 9, the master power supply module 92 includes: a fortieth resistor R40, a fortieth first resistor R41, a nineteenth capacitor C19, a twelfth diode D12, a twentieth capacitor C20, a twenty-first capacitor C21, a fifth switching tube Q5 and a voltage conversion chip U4.
Specifically, a first end of a forty-first resistor R40 is connected to the second rectifying unit 61, a second end of a forty-first resistor R40, a first end of a forty-first resistor R41, and a first end of a nineteenth capacitor C19 are commonly connected to a first end of a fifth switching tube Q5, a second end of the forty-first resistor R41 and a cathode of a twelfth diode D12 are commonly connected to a control end of the fifth switching tube Q5, a second end of the fifth switching tube Q5 is connected to an input pin In of the voltage conversion chip U4, an output pin Out of the voltage conversion chip U4, a first end of a twenty-first capacitor C20, and a first end of the twenty-first capacitor C21 are commonly connected to the main control module 80, a second end of the nineteenth capacitor C19, an anode of the twelfth diode D12, a second end of the twenty-first capacitor C20, and a second end of the twenty-first capacitor C21 are commonly connected to ground.
The voltage conversion chip U4 may be a low dropout linear regulator (LDO), such as a three terminal regulator.
In one embodiment, the fifth switch Q5 may be an NPN transistor.
In one embodiment, referring to fig. 9, the pre-stage voltage detection module 91 includes: a forty-second resistor R24, a forty-third resistor R43, a forty-fourth resistor R44, and a twenty-third capacitor C23.
Specifically, a first end of the forty-second resistor R24 is connected to the second rectifying unit 61, a second end of the forty-second resistor R24 is connected to a first end of the forty-third resistor R43, a second end of the forty-third resistor R43, a first end of the twenty-third capacitor C23, and a first end of the forty-fourth resistor R44 are commonly connected to the main control module 80, and a second end of the twenty-third capacitor C23 and a second end of the forty-fourth resistor R44 are commonly connected to ground.
In one embodiment, referring to fig. 9, the main control module 80 includes: the main control chip U5, the forty-fifth resistor R45 and the twenty-second capacitor C22.
Specifically, a first pulse width modulation signal pin PWM1 of the main control chip U5 is connected to the dc driving unit 1, an nth pulse width modulation signal pin PWMN of the main control chip U5 is connected to the dc driving unit N, a ground pin GND of the main control chip U5 is grounded, a power pin VDD of the main control chip U5 and a first end of a forty-fifth resistor R45 are commonly connected to an output end MCUVCC of the main control power supply module 92, a first detection pin ADC1 of the main control chip U5, a second end of the forty-fifth resistor R45 and a first end of a twenty-second capacitor C22 are commonly connected to the dial switch module 93, a second end of the twenty-second capacitor C22 is grounded, and a second detection pin ADC2 of the main control chip U5 is connected to the preceding-stage voltage detection module 91.
In the present embodiment, the first test pin ADC1 of the main control chip U5 is used for testing the bus voltage of the dc conversion module 60, i.e. the voltage of the input voltage signal thereof, and the second test pin ADC2 is used for testing the dial switch position of the dial switch module 93.
In one embodiment, referring to fig. 9, the toggle module 93 includes: the multi-step switch SW, a forty-sixth resistor R46, a forty-seventh resistor R47, a forty-eighth resistor R48, a forty-eighth resistor R48, a forty-ninth resistor R49 and a fifty-fifth resistor R50.
Specifically, the common terminal of the multi-stage switch SW is grounded, the first stage port, the second stage port, the third stage port, the fourth stage port and the fifth stage port of the multi-stage switch SW are respectively connected with the first ends of the forty-sixth resistor R46, the forty-seventh resistor R47, the forty-eighth resistor R48, the forty-eighth resistor R48, the forty-ninth resistor R49 and the fifty-fifth resistor R50 in a one-to-one correspondence manner, and the second ends of the forty-sixth resistor R46, the forty-seventh resistor R47, the forty-eighth resistor R48, the forty-eighth resistor R48, the forty-ninth resistor R49 and the fifty-fifth resistor R50 are connected in common to form an output terminal AD of the dial switch module 93 and connected with the first detection pin ADC1 of the main control chip U5.
In one embodiment, the dc conversion module 60 may include a plurality of dc driving units, and each of the dc driving units may have the same structure, for example, referring to fig. 9, a circuit structure of the dc driving unit 621 may be the same as a circuit structure of the dc driving unit 62N.
The dc driving unit 621 includes: a twenty-fourth capacitor C24, a twenty-fifth capacitor C25, a twenty-sixth capacitor C26, a twenty-seventh capacitor C27, a twenty-eighth capacitor C28, a twenty-ninth capacitor C29, a thirty-sixth capacitor C30, a fifty-first resistor R51, a fifty-second resistor R52, a fifty-third resistor R53, a fifty-fourth resistor R54, a fifty-fifth resistor R55, a fifty-sixth resistor R56, a fifty-seventh resistor R57, a thirteenth diode D13, a fourteenth diode D14, a seventh inductor L7, and a first dc driving chip U6.
Specifically, the power input pin VIN of the first dc driving chip U6, the first end of the twenty-fifth capacitor C25, the first end of the fifty-third resistor R53, the first end of the fifty-fourth resistor R54, the first end of the twenty-fourth capacitor C24, the cathode of the fourteenth diode D14, and the first end of the twenty-eighth capacitor C28 are commonly connected to the output terminal VIN of the second rectifying unit 61, the second end of the twenty-fifth capacitor C25 is grounded, the current detection pin SNS of the first dc driving chip U6, the second end of the fifty-third resistor R53, and the second end of the fifty-fourth resistor R54 are commonly connected to the anode of the thirteenth diode D13, the inductor node pin LX of the first dc driving chip U6, the first end of the twenty-seventh capacitor C27, the first end of the fifty-sixth resistor R56, the anode of the fourteenth diode D14, and the first end of the seventh inductor L7 are commonly connected, the second end of the sixth resistor R56 is commonly connected to the twenty-eighth capacitor C28, the second end of the twenty-seventh capacitor C27 is grounded, the pulse width modulation signal pin ADJ of the first dc driving chip U6, the first end of the fifty-second resistor R52, the first end of the twenty-sixth capacitor C26, and the first end of the fifty-first resistor R51 are commonly connected, the second end of the fifty-first resistor R51 is connected to the first pulse width modulation signal pin of the main control chip U5, the second end of the twenty-sixth capacitor C26, the second end of the fifty-second resistor R52, the ground pin of the first dc driving chip U6, and the first end of the fifty-seventh resistor R57 are commonly connected to ground, the second end of the fifty-seventh resistor R57 is connected to the first end of the thirty-capacitor C30, the second end of the thirty-capacitor C30, the second end of the seventh inductor L7, the first end of the fifth resistor R55, the first end of the twenty-ninth capacitor C29, and the second end of the thirty-capacitor C30 are commonly connected to form a first negative driving terminal of the light source module 71, the cathode of the thirteenth diode D13, the second end of the fifty-fifth resistor R55, and the second end of the twenty-ninth capacitor C29 are commonly connected to form a first positive driving terminal connected to the light source module 71.
In one embodiment, referring to fig. 9, the dc driving unit 62N includes: a thirty-first capacitor C31, a thirty-second capacitor C32, an nth dc driving chip U7, a thirty-third capacitor C33, a thirty-fourth capacitor C34, a thirty-fifth capacitor C35, a thirty-sixth capacitor C36, a thirty-seventh capacitor C37, a fifteenth diode D15, an eighth inductor L8, a sixteenth diode D16, a fifty-eighth resistor R58, a fifty-ninth resistor R59, a sixteenth resistor R60, a sixteenth resistor R61, a sixteenth resistor R62, a sixteenth resistor R63, and a sixteenth resistor R64.
In this embodiment, a thirty-first capacitor C31, a thirty-second capacitor C32, a thirty-third capacitor C33, a thirty-fourth capacitor C34, a thirty-fifth capacitor C35, a thirty-sixth capacitor C36, a thirty-seventh capacitor C37, a fifteenth diode D15, an eighth inductor L8, a sixteenth diode D16, a fifty-eighth resistor R58, a fifty-ninth resistor R59, a sixty resistor R60, a sixty-first resistor R61, a sixty-second resistor R62, a sixty-third resistor R63, and a sixty-fourth resistor R64 constitute a peripheral circuit of the nth dc driving chip U7, and the nth dc driving chip U7 constitutes a dc driving circuit, which has a circuit structure identical to that of the dc driving unit 621, and a specific circuit structure of the dc driving circuit can be referred to fig. 9.
The embodiment of the application also provides a light source driving device, which comprises the light source driving circuit.
The embodiment of the application also provides a lamp which comprises the light source driving circuit.
In a specific application embodiment, the light source driving s-circuit in the embodiment of the present application is added with the thyristor compensation module 40 and the current regulation module 30 on the basis of a conventional constant voltage output switching power supply circuit, so that the output voltage of the light source driving s-circuit can linearly change along with the change of the conduction angle of the thyristor 10, a multi-path direct current driving unit is adopted at the rear stage to form the direct current conversion module 60, the front end voltage detection is performed in cooperation with the main control module 80, and meanwhile, the dial switch module 93 is used for setting the color temperature of the main control module 80, so that the cost is reduced while the dimming and color mixing functions are realized, and the user experience of the product is improved.
The embodiment of the application provides a light source drive circuit, light source drive arrangement and lamps and lanterns, light source drive circuit includes: rectifier filter module, the current regulation module, silicon controlled rectifier compensation module, constant voltage switch power module and direct current conversion module, rectifier filter module carries out rectifier filter to the chopper alternating current of silicon controlled rectifier output, the direct current that the output corresponds, the current regulation module is according to the direct current's of conduction angle regulation size of silicon controlled rectifier, silicon controlled rectifier compensation module generates silicon controlled rectifier compensation signal according to the conduction angle of silicon controlled rectifier and adjusts in order to the constant voltage switch power signal of constant voltage switch power module output, direct current conversion module generates multichannel light source drive signal according to multichannel pulse width modulation signal and constant voltage switch power signal, light with driving a plurality of light source modules, thereby can compatible silicon controlled rectifier adjust luminance the colour when single-stage constant voltage output connects a plurality of light source modules.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. The utility model provides a light source drive circuit, is connected with silicon controlled rectifier and a plurality of light source module, its characterized in that, light source drive circuit includes:
the rectification filtering module is used for accessing the silicon controlled rectifier, performing rectification filtering processing on chopped AC output by the silicon controlled rectifier and outputting corresponding DC;
the current adjusting module is connected with the rectifying and filtering circuit and used for adjusting the direct current according to the conduction angle of the controllable silicon;
the silicon controlled rectifier compensation module is connected with the current regulating circuit and used for generating a silicon controlled rectifier compensation signal according to the conduction angle of the silicon controlled rectifier;
the constant voltage switch power supply module is connected with the rectification filter module and the silicon controlled rectifier compensation module and used for receiving the direct current and the silicon controlled rectifier compensation signals and outputting constant voltage switch power supply signals according to the direct current and the silicon controlled rectifier compensation signals;
and the direct current conversion module is connected with the constant voltage switch power supply module and the plurality of light source modules, and is used for receiving the constant voltage switch power supply signal and generating a plurality of light source driving signals according to the plurality of pulse width modulation signals and the constant voltage switch power supply signal so as to drive the plurality of light source modules to be lightened.
2. The light source driving circuit according to claim 1, further comprising:
and the main control module is used for providing a plurality of paths of pulse width modulation signals.
3. The light source driving circuit according to claim 2, further comprising:
the preceding-stage voltage detection module is connected with the direct current conversion module and the main control module, and is used for detecting an input voltage signal of the direct current conversion module and generating a preceding-stage voltage detection signal according to the input voltage signal;
the main control module is further used for adjusting the plurality of light source driving signals according to the preceding-stage voltage detection signal.
4. The light source driving circuit according to claim 2, further comprising:
and the master control power supply module is respectively connected with the direct current conversion module and the master control module and is used for receiving the input voltage signal of the direct current conversion module and carrying out voltage conversion on the input voltage signal to generate a master control power supply signal so as to supply power to the master control module.
5. The light source driving circuit according to claim 2, further comprising:
the dial switch module is connected with the main control module and used for generating a color temperature gear switching signal according to a dial instruction input by a user;
the main control module is further used for adjusting the plurality of light source driving signals according to the color temperature gear switching signal so as to adjust the color temperature of the plurality of light source modules.
6. The light source driving circuit according to claim 1, wherein the rectifying and filtering module comprises:
the first anti-interference unit is connected with the silicon controlled rectifier and used for eliminating electromagnetic interference of the external environment on the chopped wave alternating current;
the first rectifying unit is connected with the anti-interference unit and used for rectifying the chopped alternating current to generate the direct current;
and the second anti-interference unit is connected with the first rectifying unit and is used for eliminating electromagnetic interference of the direct current from the outside.
7. The light source driving circuit according to claim 1, wherein the constant voltage switching power supply module comprises:
the constant voltage driving unit is connected with the rectifying and filtering module and used for outputting a constant voltage switching power supply signal according to the direct current and the silicon controlled rectifier compensation signal;
and the sampling feedback unit is connected with the constant voltage driving unit and used for sampling the constant voltage switch power supply signal and adjusting the constant voltage switch power supply signal according to a sampling result.
8. The light source driving circuit according to claim 2, wherein the dc conversion module comprises:
the second rectifying unit is connected with the constant voltage switch power supply module and used for rectifying the constant voltage switch power supply signal to generate an input voltage signal;
the plurality of direct current driving units are connected with the second rectifying unit and the main control module and used for receiving the plurality of paths of pulse width modulation signals provided by the main control module and respectively generating a plurality of paths of light source driving signals according to the plurality of paths of pulse width modulation signals;
the plurality of direct current driving units are connected with the plurality of light source modules in a one-to-one correspondence mode.
9. A light source driving apparatus comprising the light source driving circuit according to any one of claims 1 to 8.
10. A luminaire comprising a light source driving circuit as claimed in any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121073239.3U CN216162892U (en) | 2021-05-19 | 2021-05-19 | Light source driving circuit, light source driving device and lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121073239.3U CN216162892U (en) | 2021-05-19 | 2021-05-19 | Light source driving circuit, light source driving device and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117998698A (en) * | 2024-01-18 | 2024-05-07 | 东莞市倍祺电子科技有限公司 | Double-compatible dimming power supply and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117998698A (en) * | 2024-01-18 | 2024-05-07 | 东莞市倍祺电子科技有限公司 | Double-compatible dimming power supply and control method thereof |
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