CN113395807B - Dimming circuit, PCB and dimming power supply - Google Patents
Dimming circuit, PCB and dimming power supply Download PDFInfo
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- CN113395807B CN113395807B CN202110607772.1A CN202110607772A CN113395807B CN 113395807 B CN113395807 B CN 113395807B CN 202110607772 A CN202110607772 A CN 202110607772A CN 113395807 B CN113395807 B CN 113395807B
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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Abstract
The invention discloses a dimming circuit, a PCB (printed circuit board) and a dimming power supply, wherein the dimming circuit comprises a power supply input unit, a control unit, a discharge unit and an output unit; the power input unit is used for filtering and rectifying an input signal, the control unit is used for regulating and controlling the whole work of the dimming circuit, the discharge unit is used for realizing the voltage release of the control unit, and the output unit is used for realizing the output of the dimming signal; the power input unit is respectively connected with the control unit and the discharge unit, and the control unit is also connected with the discharge unit and the output unit; the dimming circuit comprises a discharge unit, and can quickly release the voltage remained by a control unit so as to prevent the control unit from restarting to cause flicker in the process of quick switching, thereby solving the problem of circuit stroboscopic; the dimming circuit disclosed by the application has the advantages of simple circuit and low circuit cost.
Description
Technical Field
The invention relates to the technical field of dimming power supplies, in particular to a dimming circuit, a PCB and a dimming power supply.
Background
The circuit structure of a dimming circuit adopted by the existing dimming power supply is generally complex, the problem of stroboflash can exist due to the fact that only an AC-DC line is adopted to achieve dimming, the existing dimming circuit generally comprises a front-stage AC-DC output line and a rear-stage DC-DC output line, the stroboflash problem is solved through the DC-DC output line, and the problem of high circuit cost exists due to the fact that an independent control chip needs to be introduced into the DC-DC output line.
It is seen that improvements and enhancements in the prior art are needed.
Disclosure of Invention
In view of the foregoing disadvantages of the prior art, an object of the present invention is to provide a dimming circuit, which can solve the problem of stroboscopic without introducing an additional chip, and has the advantages of simple circuit and low circuit cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a dimming circuit comprises a power input unit, a control unit, a discharge unit and an output unit; the power input unit is used for filtering and rectifying an input signal, the control unit is used for regulating and controlling the whole work of the dimming circuit, the discharge unit is used for realizing the voltage release of the control unit, and the output unit is used for realizing the output of the dimming signal; the power input unit is respectively connected with the control unit and the discharge unit, and the control unit is also connected with the discharge unit and the output unit.
The dimming circuit further comprises a power supply unit, the power supply unit is connected with the control unit and the external communication unit, the power supply unit is used for providing stable working voltage for the external communication unit, and the external communication unit is further connected with the control unit.
In the dimming circuit, the control unit comprises a second inductor L2, and the power supply unit comprises a ninth diode D9, a twelfth diode D10 and a seventeenth capacitor C17; an auxiliary winding coil of the second inductor L2 is connected to anodes of a ninth diode D9 and a twelfth diode D10, respectively, a cathode of the ninth diode D9, a cathode of the twelfth diode D10, and one end of a seventeenth capacitor C17 are connected to an external communication unit, respectively, and the other end of the seventeenth capacitor C17 is grounded.
The dimming circuit further comprises a protection unit, the protection unit is used for realizing open circuit protection, and the protection unit is connected with the output unit.
In the dimming circuit, the control unit comprises a first control chip U1, and the discharge unit comprises a first diode D1, a second diode D2, a first voltage divider, a seventh capacitor C7 and a third triode Q3; the anode of the first diode D1 and the anode of the second diode D2 are respectively connected with the power input unit, and the cathode of the first diode D1 and the cathode of the second diode D2 are respectively connected with the first voltage division part; a base electrode of the third triode Q3 and one end of a seventh capacitor C7 are respectively connected with the first voltage division part, and an emitting electrode of the third triode Q3 is connected with a pin 6 of the first control chip U1; and the collector of the third triode Q3 and the other end of the seventh capacitor C7 are respectively grounded.
In the dimming circuit, the control unit further includes a sixth capacitor C6, a second voltage divider, and a fifteenth capacitor C15; the output end of the power input unit is connected with one end of the sixth capacitor C6 and the input end of the second voltage divider respectively, the output end of the second voltage divider and one end of the fifteenth capacitor C15 are connected with the pin 6 of the first control chip U1 respectively, and the other end of the sixth capacitor C6 and the other end of the fifteenth capacitor C15 are grounded respectively.
In the dimming circuit, the control unit further includes a first transformer T1, a thirty-third resistor R33, a thirty-fourth resistor R34, an eighth capacitor C8, a ninth capacitor C9, a first transistor Q1, a second transistor Q2, a fourth diode D4, and a fifth diode D5, the first transformer T1 includes a first coil, a second coil, a third coil, and a fourth coil, and the first coil and the second coil are mutually inductive with the third coil and the fourth coil, respectively; a pin 4 of the second coil is connected with a pin 4 of the first control chip U1, and a pin 5 of the second coil is connected with a pin 3 of the first control chip U1; a pin 6 of the third coil is connected with one end of a thirty-fourth resistor R34, the other end of the thirty-fourth resistor R34 is connected with a base electrode of a first triode Q1, a collector electrode of the first triode Q1 is connected with the power input unit, an emitter electrode of the first triode Q1 and a pin 3 of the third coil are respectively connected with a collector electrode of a second triode Q2 and a pin 7 of the first coil, and an eighth capacitor C8 is connected between the pin 3 and the pin 6 of the third coil in parallel; a pin 1 of the fourth coil is connected with a base of a second triode Q2 and one end of a ninth capacitor C9, and a pin 8 of the fourth coil is connected with one end of a thirty-third resistor R33; a pin 2 of the first coil is respectively connected with the anode of a fourth diode D4 and the cathode of a fifth diode D5; the cathode of the fourth diode D4 is connected with the power input unit; the anode of the fifth diode D5, the emitter of the second triode Q2, the other end of the ninth capacitor C9, and the other end of the thirty-third resistor R33 are grounded, respectively.
In the dimming circuit, the power input unit comprises a filtering part and a rectifying part, the output end of the filtering part is respectively connected with the rectifying part and the discharging unit, and the output end of the rectifying part is connected with the control unit.
The invention also correspondingly provides a PCB board on which the dimming circuit is printed.
The invention also correspondingly provides a dimming power supply which comprises a shell and the PCB, wherein the PCB is fixedly arranged in the shell.
Has the advantages that:
the invention provides a dimming circuit which comprises a discharging unit, wherein the discharging unit can quickly release the voltage remained by a control unit so as to prevent the control unit from flickering caused by restarting in the process of quickly switching on and off a dimming power supply, so that the stroboscopic problem of the dimming circuit is solved.
Drawings
Fig. 1 is a circuit block diagram of a dimming circuit provided in the present invention;
fig. 2 is a circuit structure diagram of a dimming circuit provided in the present invention;
fig. 3 is a circuit structure diagram of a power input unit and a discharge unit provided in the present invention;
FIG. 4 is a circuit configuration diagram of a control unit provided in the present invention;
FIG. 5 is a circuit diagram of a power supply unit according to the present invention;
fig. 6 is a circuit configuration diagram of an output unit provided by the present invention;
fig. 7 is a circuit structure diagram of the protection unit provided by the present invention.
Description of the main element symbols: 1-power input unit, 2-control unit, 3-discharge unit, 4-output unit, 5-power supply unit and 6-protection unit.
Detailed Description
The invention provides a dimming circuit, a PCB and a dimming power supply, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and the like are to be interpreted broadly, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1 to 7, the present invention provides a dimming circuit, which includes a power input unit 1, a control unit 2, a discharge unit 3 and an output unit 4; the power input unit 1 is used for filtering and rectifying an input signal, the control unit 2 is used for regulating and controlling the overall work of the dimming circuit, the discharge unit 3 is used for realizing the voltage release of the control unit 2, and the output unit 4 is used for realizing the output of the dimming signal; the power input unit 1 is connected to the control unit 2 and the discharge unit 3, respectively, and the control unit 2 is further connected to the discharge unit 3 and the output unit 4.
The utility model discloses a dimming circuit, including discharge unit 3, discharge unit 3 can be fast with the remaining voltage release of control unit 2 to prevent at the in-process of the quick switch of power of adjusting luminance, control unit 2 restarts and leads to the scintillation, thereby has solved dimming circuit's stroboscopic problem, compares with current dimming circuit, need not to introduce extra control chip and can solve the stroboscopic problem, consequently, the dimming circuit that this application disclosed has the advantage that the circuit is simple, the circuit is with low costs.
Further, referring to fig. 1, fig. 2 and fig. 4, the dimming circuit further includes a power supply unit 5, the power supply unit 5 is connected to the control unit 2 and an external communication unit, the power supply unit 5 is configured to provide a stable working voltage to the external communication unit, the external communication unit is further connected to the control unit 2, and the external communication unit can transmit a control signal to the control unit 2, so as to improve the flexibility of the dimming circuit; in one embodiment, the external communication unit may be a bluetooth communication chip.
Further, referring to fig. 2 to 4, the control unit 2 includes a second inductor L2, and the power supply unit 5 includes a ninth diode D9, a twelfth diode D10 and a seventeenth capacitor C17; an auxiliary winding coil of the second inductor L2 is respectively connected with anodes of a ninth diode D9 and a twelfth diode D10, a cathode of the ninth diode D9, a cathode of the twelfth diode D10 and one end of a seventeenth capacitor C17 are respectively connected with an external communication unit, and the other end of the seventeenth capacitor C17 is grounded; the voltage induced by the auxiliary winding coil of the second inductor L2 is rectified by the ninth diode D9 and the twelfth diode D10, and then stored by the seventeenth capacitor C17 to supply power to the external communication unit.
In one embodiment, the external communication unit includes a pin AUX and a pin DIM, the pin AUX of the external communication unit is respectively connected to the cathode of the ninth diode D9, the cathode of the twelfth diode D10, and one end of the seventeenth capacitor C17, and the pin DIM of the external communication unit is connected to the pin 2 of the first control chip U1.
In an embodiment, referring to fig. 2 and fig. 5, the power supply unit 5 further includes a fifth triode Q5, a twenty-seventh resistor R27, a twenty-sixth resistor R26, and an eleventh diode D11; one end of the twenty-seventh resistor R27 and a collector of the fifth triode Q5 are respectively connected to a negative electrode of the twelfth diode D10, an emitter of the fifth diode Q5 is connected to one end of the twenty-sixth resistor R26, and the other end of the twenty-seventh resistor R27 and a base of the fifth triode Q5 are respectively connected to an anode of the eleventh diode D11; the cathode of the eleventh diode D11 and the other end of the twenty-sixth resistor R26 are respectively connected to the pin 6 of the first control chip U1.
Further, referring to fig. 1, fig. 2 and fig. 7, the dimming circuit further includes a protection unit 6, where the protection unit 6 is used to implement open circuit protection, and the protection unit 6 is connected to the output unit 4; the protection unit 6 is arranged to carry out open-circuit protection on the output unit 4, so that the safety and stability of the dimming circuit during working can be improved.
In an embodiment, referring to fig. 6 and 7, the protection unit 6 includes a twenty-ninth resistor R29, a thirty-third resistor R30, a thirty-first resistor R31, a thirty-second point-in R31, a twenty-second capacitor C22, a sixth transistor Q6, and a seventh transistor Q7; one end of the twenty-ninth resistor R29 is connected to the output unit 4, the other end of the twenty-ninth resistor R29 is connected to one end of the thirty-first resistor R30 and the base of the sixth triode Q6, and the collector of the sixth triode is connected to one end of the thirty-first resistor R31, the base of the seventh triode Q7 and one end of the twenty-second capacitor C22; the other end of the thirty-first resistor R31 and one end of the thirty-second resistor R32 are respectively connected with the output unit 4, and the other end of the thirty-second resistor R32 is connected with the collector of the seventh triode Q7; the other end of the thirtieth resistor R30, the emitter of the sixth triode Q6, the other end of the twenty-second capacitor C22 and the emitter of the seventh triode Q7 are respectively grounded.
Further, referring to fig. 2 to 4, the control unit 2 includes a first control chip U1, and the discharge unit 3 includes a first diode D1, a second diode D2, a first voltage divider, a seventh capacitor C7, and a third triode Q3; the anode of the first diode D1 and the anode of the second diode D2 are respectively connected with the power input unit 1, and the cathode of the first diode D1 and the cathode of the second diode D2 are respectively connected with the first voltage dividing part; a base electrode of the third triode Q3 and one end of a seventh capacitor C7 are respectively connected with the first voltage division part, and an emitting electrode of the third triode Q3 is connected with a pin 6 of the first control chip U1; the collector of the third triode Q3 and the other end of the seventh capacitor C7 are respectively grounded; in one embodiment, the model of the first control chip U1 may be RED2822; the third triode Q3 is a PNP triode; the first voltage division part comprises a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6; one end of the fourth resistor R4 is connected to the cathode of the first diode D1 and the cathode of the second diode D2, the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6 and one end of the seventh capacitor C7, and the other end of the sixth resistor R6 and the other end of the seventh capacitor C7 are grounded.
When external power source falls the power, when power input unit 1 falls the power promptly, the voltage passes through first diode D1, after the second diode D2 rectification, rethread seventh electric capacity C7 energy storage, through third triode Q3 with the VDD voltage of pin 6 of first control chip U1 to ground formation 0 voltage to release first control chip U1 remaining voltage fast, thereby prevent at the in-process of the quick switch of power of adjusting luminance, first control chip U1 restarts and leads to the scintillation.
Further, referring to fig. 2 to 4, the control unit 2 further includes a sixth capacitor C6, a second voltage divider, and a fifteenth capacitor C15; an output end of the power input unit 1 is connected with one end of the sixth capacitor C6 and an input end of a second voltage divider respectively, an output end of the second voltage divider and one end of a fifteenth capacitor C15 are connected with a pin 6 of the first control chip U1 respectively, and the other end of the sixth capacitor C6 and the other end of the fifteenth capacitor C15 are grounded respectively; in one embodiment, the second voltage divider includes a sixteenth resistor R16, a seventeenth resistor R17 and an eighteenth resistor R18 connected in series in sequence, one end of the sixteenth resistor R16 is connected to the output end of the power input unit 1, and the other end of the eighteenth resistor R18 is connected to the pin 6 of the first control chip U1.
When the dimming circuit works, the voltage rectified by the power input unit 1 is stored by the sixth capacitor C6, is divided by the second voltage dividing part, and is supplied to the pin 6 of the first control chip U1 after being stored by the fifteenth capacitor C15, so that the first control chip U1 is started to work.
Further, referring to fig. 2 to 4, the control unit 2 further includes a first transformer T1, a thirty-third resistor R33, a thirty-fourth resistor R34, an eighth capacitor C8, a ninth capacitor C9, a first transistor Q1, a second transistor Q2, a fourth diode D4, and a fifth diode D5, the first transformer T1 includes a first coil, a second coil, a third coil, and a fourth coil, and the first coil and the second coil are mutually inductive with the third coil and the fourth coil, respectively; a pin 4 of the second coil is connected with a pin 4 of the first control chip U1, and a pin 5 of the second coil is connected with a pin 3 of the first control chip U1; a pin 6 of the third coil is connected with one end of a thirty-fourth resistor R34, the other end of the thirty-fourth resistor R34 is connected with a base electrode of a first triode Q1, a collector electrode of the first triode Q1 is connected with the power input unit 1, an emitter electrode of the first triode Q1 and a pin 3 of the third coil are respectively connected with a collector electrode of a second triode Q2 and a pin 7 of the first coil, and an eighth capacitor C8 is connected in parallel between the pin 3 and the pin 6 of the third coil; a pin 1 of the fourth coil is connected with a base of a second triode Q2 and one end of a ninth capacitor C9, and a pin 8 of the fourth coil is connected with one end of a thirty-third resistor R33; a pin 2 of the first coil is respectively connected with the anode of a fourth diode D4 and the cathode of a fifth diode D5; the cathode of the fourth diode D4 is connected with the power input unit 1; the anode of the fifth diode D5, the emitter of the second triode Q2, the other end of the ninth capacitor C9, and the other end of the thirty-third resistor R33 are grounded, respectively.
When the dimming circuit works, the primary energy fed back to the first control chip U1 is fed back to the first coil, the second coil and the fourth coil through the second coil of the first transformer T1 to be output; the working state of the second coil is adjusted through the first control chip U1 to realize constant current output, the PF value of the dimming circuit is improved, and the working effect of the dimming circuit is optimized.
Further, referring to fig. 1 to 3, the power input unit 1 includes a filtering portion and a rectifying portion, an output end of the filtering portion is respectively connected to an input end of the rectifying portion and the discharging unit 3, and an output end of the rectifying portion is connected to the control unit 2; in one embodiment, the filtering part includes an EMI filter to filter EMI interference of an input power; the rectifying portion includes a bridge rectifier BR1 to convert the AC voltage into a DC voltage.
In an embodiment, referring to fig. 2 and fig. 3, in an embodiment, the power input unit 1 further includes a first inductor L1, a third resistor R3, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4; one end of the first inductor L1 is connected with the output end of the filtering part, and the third resistor R3 is connected with the first inductor L1 in parallel; the other end of the first inductor L1 is connected to one end of the second capacitor C2, one end of the discharge unit 3, one end of the third capacitor C3, and one end of the fourth capacitor C4; the other end of the second capacitor C2 is connected with the control unit 2, and the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are respectively grounded; through LC resonance, can realize high PF, optimize dimmer circuit's working effect.
The invention also correspondingly provides a PCB board on which the dimming circuit is printed.
The invention also correspondingly provides a dimming power supply which comprises a shell and the PCB, wherein the PCB is fixedly arranged in the shell; in one embodiment, the PCB board is screwed to the housing.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (9)
1. A dimming circuit is characterized by comprising a power supply input unit, a control unit, a discharge unit, an output unit and a protection unit; the power input unit is used for filtering and rectifying an input signal, the control unit is used for regulating and controlling the whole work of the dimming circuit, the discharge unit is used for realizing the voltage release of the control unit, and the output unit is used for realizing the output of the dimming signal; the power input unit is respectively connected with the control unit and the discharge unit, and the control unit is also connected with the discharge unit and the output unit; the protection unit is used for realizing open-circuit protection and is connected with the output unit;
the protection unit comprises a twenty-ninth resistor R29, a thirtieth resistor R30, a thirty-first resistor R31, a thirty-second resistor R32, a twenty-second capacitor C22, a sixth triode Q6 and a seventh triode Q7; one end of the twenty-ninth resistor R29 is connected to the output unit, the other end of the twenty-ninth resistor R29 is connected to one end of the thirty-first resistor R30 and the base of the sixth triode Q6, and the collector of the sixth triode Q6 is connected to one end of the thirty-first resistor R31, the base of the seventh triode Q7 and one end of the twenty-second capacitor C22; the other end of the thirty-first resistor R31 and one end of the thirty-second resistor R32 are respectively connected with the output unit, and the other end of the thirty-second resistor R32 is connected with a collector of the seventh triode Q7; the other end of the thirtieth resistor R30, the emitter of the sixth triode Q6, the other end of the twenty-second capacitor C22, and the emitter of the seventh triode Q7 are respectively grounded.
2. A dimming circuit as claimed in claim 1, further comprising a power supply unit, the power supply unit is connected to the control unit and the external communication unit, the power supply unit is configured to provide a stable operating voltage to the external communication unit, and the external communication unit is further connected to the control unit.
3. A dimming circuit as claimed in claim 2, wherein the control unit comprises a second inductor L2, the power supply unit comprises a ninth diode D9, a twelfth diode D10 and a seventeenth capacitor C17; an auxiliary winding coil of the second inductor L2 is connected to anodes of a ninth diode D9 and a twelfth diode D10, respectively, a cathode of the ninth diode D9, a cathode of the twelfth diode D10, and one end of a seventeenth capacitor C17 are connected to an external communication unit, respectively, and the other end of the seventeenth capacitor C17 is grounded.
4. The dimming circuit of claim 1, wherein the control unit comprises a first control chip U1, the model of the first control chip U1 is RED2822; the discharging unit comprises a first diode D1, a second diode D2, a first voltage division part, a seventh capacitor C7 and a third triode Q3; the anode of the first diode D1 and the anode of the second diode D2 are respectively connected with the power input unit, and the cathode of the first diode D1 and the cathode of the second diode D2 are respectively connected with the first voltage division part; a base electrode of the third triode Q3 and one end of a seventh capacitor C7 are respectively connected with the first voltage division part, and an emitting electrode of the third triode Q3 is connected with a pin 6 of the first control chip U1; and the collector of the third triode Q3 and the other end of the seventh capacitor C7 are respectively grounded.
5. A dimming circuit according to claim 4, wherein the control unit further comprises a sixth capacitor C6, a second voltage divider, and a fifteenth capacitor C15; the output end of the power input unit is connected with one end of the sixth capacitor C6 and the input end of the second voltage divider respectively, the output end of the second voltage divider and one end of the fifteenth capacitor C15 are connected with the pin 6 of the first control chip U1 respectively, and the other end of the sixth capacitor C6 and the other end of the fifteenth capacitor C15 are grounded respectively.
6. A dimming circuit according to claim 4, wherein the control unit further comprises a first transformer T1, a thirty-third resistor R33, a thirty-fourth resistor R34, an eighth capacitor C8, a ninth capacitor C9, a first transistor Q1, a second transistor Q2, a fourth diode D4 and a fifth diode D5, the first transformer T1 comprises a first coil, a second coil, a third coil and a fourth coil, and the first coil and the second coil are mutually inductive with the third coil and the fourth coil respectively; a pin 4 of the second coil is connected with a pin 4 of the first control chip U1, and a pin 5 of the second coil is connected with a pin 3 of the first control chip U1; a pin 6 of the third coil is connected with one end of a thirty-fourth resistor R34, the other end of the thirty-fourth resistor R34 is connected with a base electrode of a first triode Q1, a collector electrode of the first triode Q1 is connected with the power input unit, an emitter electrode of the first triode Q1 and a pin 3 of the third coil are respectively connected with a collector electrode of a second triode Q2 and a pin 7 of the first coil, and an eighth capacitor C8 is connected in parallel between the pin 3 and the pin 6 of the third coil; a pin 1 of the fourth coil is connected with a base of a second triode Q2 and one end of a ninth capacitor C9, and a pin 8 of the fourth coil is connected with one end of a thirty-third resistor R33; a pin 2 of the first coil is respectively connected with the anode of a fourth diode D4 and the cathode of a fifth diode D5; the cathode of the fourth diode D4 is connected with the power input unit; the anode of the fifth diode D5, the emitter of the second triode Q2, the other end of the ninth capacitor C9, and the other end of the thirty-third resistor R33 are grounded, respectively.
7. A dimming circuit as claimed in claim 1, wherein the power input unit comprises a filter part and a rectifier part, the output terminal of the filter part is connected to the rectifier part and the discharge unit, respectively, and the output terminal of the rectifier part is connected to the control unit.
8. A PCB board, wherein the dimming circuit of any one of claims 1-7 is printed on the PCB board.
9. A dimming power supply comprising a housing and the PCB of claim 8, wherein the PCB is fixedly disposed within the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110607772.1A CN113395807B (en) | 2021-06-01 | 2021-06-01 | Dimming circuit, PCB and dimming power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110607772.1A CN113395807B (en) | 2021-06-01 | 2021-06-01 | Dimming circuit, PCB and dimming power supply |
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| Publication Number | Publication Date |
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| CN113395807A CN113395807A (en) | 2021-09-14 |
| CN113395807B true CN113395807B (en) | 2022-11-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866757A (en) * | 2011-07-07 | 2013-01-09 | 鸿富锦精密工业（深圳）有限公司 | Discharge circuit |
| CN107872912A (en) * | 2017-12-04 | 2018-04-03 | 上海晶丰明源半导体股份有限公司 | Control circuit/method, dimming control system and electronic equipment |
| CN108173423A (en) * | 2018-02-07 | 2018-06-15 | 东莞育嘉电子有限公司 | For the diode discharge circuit of chassis power supply |
| CN110994967A (en) * | 2019-12-25 | 2020-04-10 | 深圳创维－Rgb电子有限公司 | Reverse switching circuit, television power supply and television |
-
2021
- 2021-06-01 CN CN202110607772.1A patent/CN113395807B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102866757A (en) * | 2011-07-07 | 2013-01-09 | 鸿富锦精密工业（深圳）有限公司 | Discharge circuit |
| CN107872912A (en) * | 2017-12-04 | 2018-04-03 | 上海晶丰明源半导体股份有限公司 | Control circuit/method, dimming control system and electronic equipment |
| CN108173423A (en) * | 2018-02-07 | 2018-06-15 | 东莞育嘉电子有限公司 | For the diode discharge circuit of chassis power supply |
| CN110994967A (en) * | 2019-12-25 | 2020-04-10 | 深圳创维－Rgb电子有限公司 | Reverse switching circuit, television power supply and television |
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| CN113395807A (en) | 2021-09-14 |
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