CN203467004U - Light-adjustable LED drive power supply - Google Patents
Light-adjustable LED drive power supply Download PDFInfo
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- CN203467004U CN203467004U CN201320398701.6U CN201320398701U CN203467004U CN 203467004 U CN203467004 U CN 203467004U CN 201320398701 U CN201320398701 U CN 201320398701U CN 203467004 U CN203467004 U CN 203467004U
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- 238000004804 winding Methods 0.000 claims abstract description 36
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 57
- 230000003287 optical effect Effects 0.000 claims description 10
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000004313 glare Effects 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a light-adjustable LED drive power supply used for driving an LED. The light-adjustable LED drive power supply comprises a rectifying unit, a transformer T1 and an output unit, wherein the input end of the rectifying unit is connected with a mains supply, a secondary winding of the transformer T1 is connected with the output unit, a light adjusting circuit is connected between a primary winding of the transformer T1 and the rectifying unit, a light adjusting drive circuit is connected between the light adjusting circuit and an auxiliary winding of the transformer T1, and the light adjusting drive circuit is composed of a digital light adjusting control chip U1 and peripheral circuits thereof. The light-adjustable LED drive power supply of the utility model has the following advantages the light adjusting precision is high, no flicker or glare occurs during light adjusting, the current stability is high, the light-adjustable LED drive power supply is safe and reliable in use, the number of circuit components is small, power consumption can be adjusted and limited to the maximum, and reasonable energy consumption is realized.
Description
Technical field
The utility model relates to a kind of in the LED of LED power technique fields, particularly tunable optical driving power.
Background technology
At present, LED lamp is a kind of energy-conservation, environmental protection, small, the novel solid light source that life-span is long and luminous intensity is large, constantly promote in recent years and be applied to normal lighting field, conventional LED driving power adopts photoelectrical coupler mostly, this type of LED driving power has following shortcoming: this LED dimming power source is when the adjusting knob of turn controllable silicon dimmer, the brightness of LED can not have along with the change of knob corresponding obvious variation, but there is suddenly larger variation in brightness when adjusting knob changes to a certain specific position, and, the moment that LED will change in brightness is sent obvious flicker and dazzle, and seal in after controllable silicon dimmer, power factor (PF) can reduce a lot, therefore, the requirement that common LED driving power can not conform and while changing, brightness be changed, particularly brightness requires under lower environment effectively energy-conservation again, and current stability is not high.
Utility model content
The purpose of this utility model be in order to solve above-mentioned the deficiencies in the prior art, provide that a kind of light modulation precision is high, flicker free and dazzle during light modulation, current stability is high, safe and reliable, circuit elements device is few, to greatest extent power consumption is regulated to restriction, realize the LED driving power of the tunable optical of rational energy consumption.
To achieve these goals, the LED driving power of the tunable optical that the utility model is designed, comprise rectification unit, transformer T1 and output unit, the input of described rectification unit is electrically connected to city, described transformer T1 secondary winding is connected with output unit, between the armature winding of transformer T1 and rectification unit 1, be connected with light adjusting circuit, and be connected with dimming driving circuit between described light adjusting circuit and the auxiliary winding of transformer T1, described dimming driving circuit is comprised of digital dimming control chip U1 and its peripheral circuit, digital dimming control chip U1 forms the core of dimming driving circuit.
In order to play effective light modulation effect, described light adjusting circuit comprises resistor R3, inductance L 3, diode D1, diode D2, resistor R6, capacitor C7, MOSFET manages Q2, resistor R12 and resistor R18, the annexation of its circuit is: resistor R3 one end connects the cathode output end of rectification unit, the input VIN end of other end linking number tone of Chinese characters photocontrol chip U1, inductance L 3 one end connect the cathode output end of rectification unit, the other end is connected with the drain D end of MOSFET pipe Q2 by resistor R6, and capacitor C7 is connected in parallel on resistor R6 two ends, the positive pole output of rectification unit is connected with the armature winding of transformer T1 by diode D1, inductance L 3 is also connected with the armature winding of transformer T1 by diode D2 with the common port of resistor R6 simultaneously, the MOSFET pipe grid G end of Q2 and the NC of digital dimming control chip U1 end are connected, and resistor R12 one end is connected on the grid G end of MOSFET pipe Q2, on the source S end of MOSFET pipe Q2, be connected with resistor R10-1.
Ripple in effective elimination rectifier output voltage, obtains galvanic current and presses, and on an end points of the armature winding of transformer T1, is connected with electrolytic capacitor filter C1, and the positive pole of electrolytic capacitor filter C1 and the end points of armature winding are connected.
Peripheral circuit in described dimming driving circuit comprises resistor R16, capacitor C9, capacitor C3, capacitor C5, resistor NTC, resistor R5, resistor R8, resistor R11, resistor R10, resistor R18, diode D4, resistor R13, resistor R3, capacitor C7, diode Z1, capacitor C4, diode BAV103, MOSFET manages Q1, MOSFET manages Q3, resistor R14, diode D3, resistor R22, capacitor C2 and resistor R15, its annexation is: resistor R16 and capacitor C9 are connected in parallel on the VSENS end of digital dimming control chip U1, common port one end after in parallel with capacitor C5 after resistor NTC and resistor R5 series connection is connected on the RT end of digital dimming control chip U1, capacitor C3 one end is connected to the input VIN end of digital dimming control chip U1, the grid G end of MOSFET pipe Q1 is connected with the OUT end of digital dimming control chip U1 by resistor R11, after resistor R13 and resistor R3 parallel connection, one end is connected to the source S end of MOSFET pipe Q1, and the source S end of MOSFET pipe Q1 is also connected with the ISENS end of digital dimming control chip U1 by resistor R18, one end of resistor R10 is connected on the grid G end of MOSFET pipe Q1, the drain D end of MOSFET pipe Q1 by diode D3 with in parallel after resistor R22, capacitor C2 connects, the other end after resistor R22 and capacitor C2 parallel connection is connected on the armature winding of transformer T1 and the common port of electrolytic capacitor filter C1 positive pole, the other end of the armature winding of transformer T1 is connected with the drain D end of MOSFET pipe Q1, the power supply end VCC of digital dimming control chip U1 is connected with the source S end of MOSFET pipe Q3 by diode D4, the MOSFET pipe grid G end of Q3 and the input VIN of digital dimming control chip U1 end are connected, the drain D end of MOSFET pipe Q3 is connected on the armature winding of transformer T1 and the common port of electrolytic capacitor filter C1 positive pole by resistor R8, between the power supply end VCC of the auxiliary winding of transformer T1 and digital dimming control chip U1, be in series with resistor R14 and diode D5, and between the power supply end VCC of digital dimming control chip U1 and power supply ground, be also connected with respectively diode Z1 and capacitor C4.
The LED driving power of the tunable optical that the utility model obtains, light modulation precision is high, flicker free and dazzle during light modulation, current stability is high, safe and reliable, circuit elements device is few, to greatest extent power consumption is regulated to restriction, realizes rational energy consumption.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of embodiment.
In figure: rectification unit 1, light adjusting circuit 2, dimming driving circuit 3, output unit connect 4.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment:
As shown in Figure 1, the LED driving power of the tunable optical that the present embodiment provides, comprise rectification unit 1, transformer T1 and output unit 4, the input of described rectification unit 1 is electrically connected to city, described transformer T1 secondary winding is connected with output unit 4, between the armature winding of transformer T1 and rectification unit 1, be connected with light adjusting circuit 2, and between described light adjusting circuit 2 and the auxiliary winding of transformer T1, be connected with dimming driving circuit 3, described dimming driving circuit 3 is comprised of digital dimming control chip U1 and its peripheral circuit.
Described light adjusting circuit 2 comprises resistor R3, inductance L 3, diode D1, diode D2, resistor R6, capacitor C7, MOSFET manages Q2, resistor R12 and resistor R18, the annexation of its circuit is: resistor R3 one end connects the cathode output end of rectification unit 1, the input VIN end of other end linking number tone of Chinese characters photocontrol chip U1, inductance L 3 one end connect the cathode output end of rectification unit 1, the other end is connected with the drain D end of MOSFET pipe Q2 by resistor R6, and capacitor C7 is connected in parallel on resistor R6 two ends, the positive pole output of rectification unit 1 is connected with the armature winding of transformer T1 by diode D1, inductance L 3 is also connected with the armature winding of transformer T1 by diode D2 with the common port of resistor R6 simultaneously, the MOSFET pipe grid G end of Q2 and the NC of digital dimming control chip U1 end are connected, and resistor R12 one end is connected on the grid G end of MOSFET pipe Q2, resistor R12 meets power supply ground GND, on the source S end of MOSFET pipe Q2, be connected with resistor R10-1, resistor R10-1 meets power supply ground GND.
On an end points of the armature winding of transformer T1, be connected with electrolytic capacitor filter C1, and the positive pole of electrolytic capacitor filter C1 and the end points of armature winding be connected, another termination power ground GND of electrolytic capacitor filter C1.
Peripheral circuit in described dimming driving circuit 3 comprises resistor R16, capacitor C9, capacitor C3, capacitor C5, resistor NTC, resistor R5, resistor R8, resistor R11, resistor R10, resistor R18, diode D4, resistor R13, resistor R3, capacitor C7, diode Z1, capacitor C4, diode BAV103, MOSFET manages Q1, MOSFET manages Q3, resistor R14, diode D3, resistor R22, capacitor C2 and resistor R15, its annexation is: resistor R16 and capacitor C9 are connected in parallel on the VSENS end of digital dimming control chip U1, resistor R16 and capacitor C9 another termination power ground in parallel GND, common port one end after in parallel with capacitor C5 after resistor NTC and resistor R5 series connection is connected on the RT end of digital dimming control chip U1, another public termination power ground GND, capacitor C3 one end is connected to the input VIN end of digital dimming control chip U1, the capacitor C3 other end connects power supply ground GND, the grid G end of MOSFET pipe Q1 is connected with the OUT end of digital dimming control chip U1 by resistor R11, after resistor R13 and resistor R3 parallel connection, one end is connected to the source S end of MOSFET pipe Q1, another termination power ground GND after resistor R13 and resistor R3 parallel connection, and the source S end of MOSFET pipe Q1 is also connected with the ISENS end of digital dimming control chip U1 by resistor R18, one end of resistor R10 is connected on the grid G end of MOSFET pipe Q1, the drain D end of MOSFET pipe Q1 by diode D3 with in parallel after resistor R22, capacitor C2 connects, the other end after resistor R22 and capacitor C2 parallel connection is connected on the armature winding of transformer T1 and the common port of electrolytic capacitor filter C1 positive pole, the other end of the armature winding of transformer T1 is connected with the drain D end of MOSFET pipe Q1, the power supply end VCC of digital dimming control chip U1 is connected with the source S end of MOSFET pipe Q3 by diode D4, the MOSFET pipe grid G end of Q3 and the input VIN of digital dimming control chip U1 end are connected, the drain D end of MOSFET pipe Q3 is connected on the armature winding of transformer T1 and the common port of electrolytic capacitor filter C1 positive pole by resistor R8, between the power supply end VCC of the auxiliary winding of transformer T1 and digital dimming control chip U1, be in series with resistor R14 and diode D5, and between the power supply end VCC of digital dimming control chip U1 and power supply ground, be also connected with respectively diode Z1 and capacitor C4.
The voltage that civil power is exported after over commutation is connected with a diode to the inner VIN of the VIN pin IC of IC to VCC pin by resistor R3, therefore, before IC normal operation, electric current can charge to VCC by diode, when VCC voltage reaches 12V, IC starts working, three half period conductings again after when IC starts, about 30mS initialization dimming state, in light adjusting circuit 2, resistance completes conducting during again, light modulation works under ohmic load condition, the peak value of resistor R10-1 limiting input current, resistor R6 can reduce the voltage power consumption of initialization time on Q2, and reduce at the controllable silicon cut conducting current spike of moment, guarantee the reliability of Q2 and light adjusting circuit 2, therefore when IC circuit is started working, through 30mS initialization time, go to judge the classification phase place of dimmer, now Q2 can keep conducting in this 30MS, driving presents pure resistive load, IC can judge dimmer classification and phase place exactly, and then output unit 4 is just started working, and LED starts there is output, through after soft start, steady operation.
Claims (4)
1. the LED driving power of a tunable optical, comprise rectification unit (1), transformer T1 and output unit (4), the input of described rectification unit (1) is electrically connected to city, described transformer T1 secondary winding is connected with output unit (4), it is characterized in that: between the armature winding of transformer T1 and rectification unit (1), be connected with light adjusting circuit (2), and between described light adjusting circuit (2) and the auxiliary winding of transformer T1, be connected with dimming driving circuit (3), described dimming driving circuit (3) is comprised of digital dimming control chip U1 and its peripheral circuit.
2. the LED driving power of tunable optical according to claim 1, it is characterized in that: described light adjusting circuit (2) comprises resistor R3, inductance L 3, diode D1, diode D2, resistor R6, capacitor C7, MOSFET manages Q2, resistor R12 and resistor R18, the annexation of its circuit is: resistor R3 one end connects the cathode output end of rectification unit (1), the input VIN end of other end linking number tone of Chinese characters photocontrol chip U1, inductance L 3 one end connect the cathode output end of rectification unit (1), the other end is connected with the drain D end of MOSFET pipe Q2 by resistor R6, and capacitor C7 is connected in parallel on resistor R6 two ends, the positive pole output of rectification unit (1) is connected with the armature winding of transformer T1 by diode D1, inductance L 3 is also connected with the armature winding of transformer T1 by diode D2 with the common port of resistor R6 simultaneously, the MOSFET pipe grid G end of Q2 and the NC of digital dimming control chip U1 end are connected, and resistor R12 one end is connected on the grid G end of MOSFET pipe Q2, on the source S end of MOSFET pipe Q2, be connected with resistor R10-1.
3. the LED driving power of tunable optical according to claim 1 and 2, is characterized in that: on an end points of the armature winding of transformer T1, be connected with electrolytic capacitor filter C1, and the positive pole of electrolytic capacitor filter C1 and the end points of armature winding are connected.
4. the LED driving power of tunable optical according to claim 1 and 2, is characterized in that: the peripheral circuit in described dimming driving circuit (3) comprises resistor R16, capacitor C9, capacitor C3, capacitor C5, resistor NTC, resistor R5, resistor R8, resistor R11, resistor R10, resistor R18, diode D4, resistor R13, resistor R3, capacitor C7, diode Z1, capacitor C4, diode BAV103, MOSFET manages Q1, MOSFET manages Q3, resistor R14, diode D3, resistor R22, capacitor C2 and resistor R15, its annexation is: resistor R16 and capacitor C9 are connected in parallel on the VSENS end of digital dimming control chip U1, common port one end after in parallel with capacitor C5 after resistor NTC and resistor R5 series connection is connected on the RT end of digital dimming control chip U1, capacitor C3 one end is connected to the input VIN end of digital dimming control chip U1, the grid G end of MOSFET pipe Q1 is connected with the OUT end of digital dimming control chip U1 by resistor R11, after resistor R13 and resistor R3 parallel connection, one end is connected to the source S end of MOSFET pipe Q1, and the source S end of MOSFET pipe Q1 is also connected with the ISENS end of digital dimming control chip U1 by resistor R18, one end of resistor R10 is connected on the grid G end of MOSFET pipe Q1, the drain D end of MOSFET pipe Q1 by diode D3 with in parallel after resistor R22, capacitor C2 connects, the other end after resistor R22 and capacitor C2 parallel connection is connected on the armature winding of transformer T1 and the common port of electrolytic capacitor filter C1 positive pole, the other end of the armature winding of transformer T1 is connected with the drain D end of MOSFET pipe Q1, the power supply end VCC of digital dimming control chip U1 is connected with the source S end of MOSFET pipe Q3 by diode D4, the MOSFET pipe grid G end of Q3 and the input VIN of digital dimming control chip U1 end are connected, the drain D end of MOSFET pipe Q3 is connected on the armature winding of transformer T1 and the common port of electrolytic capacitor filter C1 positive pole by resistor R8, between the power supply end VCC of the auxiliary winding of transformer T1 and digital dimming control chip U1, be in series with resistor R14 and diode D5, and between the power supply end VCC of digital dimming control chip U1 and power supply ground, be also connected with respectively diode Z1 and capacitor C4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320398701.6U CN203467004U (en) | 2013-07-05 | 2013-07-05 | Light-adjustable LED drive power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320398701.6U CN203467004U (en) | 2013-07-05 | 2013-07-05 | Light-adjustable LED drive power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203467004U true CN203467004U (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320398701.6U Expired - Fee Related CN203467004U (en) | 2013-07-05 | 2013-07-05 | Light-adjustable LED drive power supply |
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| CN (1) | CN203467004U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108055733A (en) * | 2017-12-29 | 2018-05-18 | 深圳市华星光电技术有限公司 | A kind of driving circuit and lighting system |
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2013
- 2013-07-05 CN CN201320398701.6U patent/CN203467004U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108055733A (en) * | 2017-12-29 | 2018-05-18 | 深圳市华星光电技术有限公司 | A kind of driving circuit and lighting system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140305 Termination date: 20140705 |
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| EXPY | Termination of patent right or utility model |