CN105898955A - Improved buck dimming LED driving power supply device and method thereof - Google Patents
Improved buck dimming LED driving power supply device and method thereof Download PDFInfo
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- CN105898955A CN105898955A CN201510038420.3A CN201510038420A CN105898955A CN 105898955 A CN105898955 A CN 105898955A CN 201510038420 A CN201510038420 A CN 201510038420A CN 105898955 A CN105898955 A CN 105898955A
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- circuit
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- light emitting
- emitting diode
- buck
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract 3
- 230000036772 blood pressure Effects 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 5
- 230000010349 pulsation Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004020 luminiscence type Methods 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 7
- 238000005070 sampling Methods 0.000 abstract 2
- 238000006243 chemical reaction Methods 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
Claims (10)
- null1. the blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit improved,Its composition includes: wherein input rectification circuit (1),Light modulation and filter circuit (2),Buck circuit (3),Biasing circuit (4),Power circuit (5),Sample circuit (6),AC-input voltage obtains the DC voltage having pulsation by rectification circuit,After light modulation and filter circuit are connected on rectification circuit,Buck circuit (3) is following closely,Play the effect that circuit is carried out decompression transformation,It is characterized in that: biasing circuit (4) is by controlling the open-minded of metal-oxide-semiconductor、Turn off,Mutually promote with Buck circuit,And act, between light modulation filtration module and power model below above, the effect formed a connecting link,Sample circuit (6) is after control circuit,Play the effect controlling electric current,Power circuitry module is connected on after Buck circuit,Realize the luminescence of LED.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 1, it is characterised in that: biasing circuit (4) is by diode D1, stabilivolt ZD2, electric capacity C1, metal-oxide-semiconductor M2, resistance R1 and IC chip composition thereof, wherein stabilivolt ZD2 and electric capacity C1 is in parallel, then connects with diode D1;Voltage on C6 electric capacity is charged to the clamp voltage of ZD1 and keeps stable.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 1, it is characterised in that: the composition of input rectification circuit (1) includes current-limiting resistance R4 and four commutation diode D2, D3, D4, D5;Wherein D2, D3, D4, D5 constitute rectifier bridge, and connect with resistance R4.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 1, it is characterized in that: light modulation and filter circuit (2) are by electric capacity C2, C3, resistance R3, inductance L1 forms, wherein in parallel with resistance R3 again after electric capacity C3 and resistance R3 series connection, inductance L1 Yu C2, the circuit connected in series of C3, R3 composition.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 1, it is characterised in that: Buck circuit (3) is by C4, R2, C6, ZD1, D6, L2 and two metal-oxide-semiconductor M1, M2 forms, wherein R2, C6, ZD1 constitute startup and the biasing circuit of pipe M1 on Buck.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 1, it is characterised in that: power circuit (5) is by electric capacity C5, and LED light emitting diode D7, D8, D9 etc. form;The wherein series connection such as LED light emitting diode D7, D8, D9, more in parallel with electric capacity C5.Charging and discharging electric current in L1 is through LED light emitting diode D7, D8, D9 etc. so that it is luminous.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 1, it is characterised in that: sample circuit (6) passes through peak value or the meansigma methods of resistance R1 sample circuit electric current, controls the shutoff of metal-oxide-semiconductor.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 2, it is characterised in that: controller IC chip uses HD3001.
- Blood pressure lowering dimming LED (Light Emitting Diode) drive electric power unit the most according to claim 8, it is characterized in that: HD3001 is internal by CS testing circuit, the electric current that the source electrode of M2 flows through detected, peak value or the meansigma methods of this electric current are made comparisons by inside with internal comparator benchmark, when reaching reference value, turning off MOS M2, when turning off MOS M2, the first exoergic process starts.
- 10. according to the method for work of the blood pressure lowering dimming LED (Light Emitting Diode) driving means described in any claim in claim 1 to 7:1) AC-input voltage is through resistance R4, then by by D2, the rectifier bridge of D3, D4, D5 composition obtains the DC voltage having certain pulsation;2) by C2, C3, R3, L1 composition filter circuit makes DC voltage stability, and by M1, the circuit of M2, D1, ZD2 composition is to chip power supply, it is achieved dimming function;3) by C4, R2, C6, ZD1, D6, L2 and two metal-oxide-semiconductor M1, M2 forms Buck circuit, by controlling turning on and off of metal-oxide-semiconductor, it is achieved blood pressure lowering;4) by D1, ZD2 and C1, M2, R1, control IC and constitute biasing circuit, detection is by the electric current within M2 source electrode, and by this electric current compared with current reference fiducial value, when this electric current reaches reference value, M2 turns off;When M2 turns off, releasing in L2 an electric current part can be charged to electric capacity C1 through C5, LED, M1, D1, and then realize self-powered process;5) the charging and discharging electric current of L2 is through LED, makes LED luminous;Energy on electric capacity C1 is released to chip voltage VCC, maintains the operating current of chip;6) formed sample circuit by R1, by peak value or the meansigma methods of sample circuit electric current, make comparisons with internal current reference value, control the shutoff of metal-oxide-semiconductor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201510038420.3A CN105898955A (en) | 2015-01-22 | 2015-01-22 | Improved buck dimming LED driving power supply device and method thereof |
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CN201510038420.3A CN105898955A (en) | 2015-01-22 | 2015-01-22 | Improved buck dimming LED driving power supply device and method thereof |
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CN105898955A true CN105898955A (en) | 2016-08-24 |
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CN201510038420.3A Pending CN105898955A (en) | 2015-01-22 | 2015-01-22 | Improved buck dimming LED driving power supply device and method thereof |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106851148A (en) * | 2016-12-25 | 2017-06-13 | 惠州三华工业有限公司 | A kind of great power LED intelligent television power supply driver |
CN110361918A (en) * | 2019-07-09 | 2019-10-22 | 深圳市火乐科技发展有限公司 | A kind of automatic light control system and the projector with it |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102523650A (en) * | 2011-12-02 | 2012-06-27 | 赵修平 | Light-emitting diode (LED) current detection and control circuit |
CN202335019U (en) * | 2011-11-28 | 2012-07-11 | 宁波龙源照明电器有限公司 | High-efficiency low-power single-ended flyback type LED (Light Emitting Diode) driving power supply |
CN203233150U (en) * | 2013-04-22 | 2013-10-09 | 上海晶丰明源半导体有限公司 | Overvoltage protection circuit in LED drive power supply and LED drive power supply |
CN103986335A (en) * | 2014-05-23 | 2014-08-13 | 浙江大学 | Flyback type LED constant-current driver based on structure without auxiliary winding |
-
2015
- 2015-01-22 CN CN201510038420.3A patent/CN105898955A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN202335019U (en) * | 2011-11-28 | 2012-07-11 | 宁波龙源照明电器有限公司 | High-efficiency low-power single-ended flyback type LED (Light Emitting Diode) driving power supply |
CN102523650A (en) * | 2011-12-02 | 2012-06-27 | 赵修平 | Light-emitting diode (LED) current detection and control circuit |
CN203233150U (en) * | 2013-04-22 | 2013-10-09 | 上海晶丰明源半导体有限公司 | Overvoltage protection circuit in LED drive power supply and LED drive power supply |
CN103986335A (en) * | 2014-05-23 | 2014-08-13 | 浙江大学 | Flyback type LED constant-current driver based on structure without auxiliary winding |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106851148A (en) * | 2016-12-25 | 2017-06-13 | 惠州三华工业有限公司 | A kind of great power LED intelligent television power supply driver |
CN110361918A (en) * | 2019-07-09 | 2019-10-22 | 深圳市火乐科技发展有限公司 | A kind of automatic light control system and the projector with it |
CN110361918B (en) * | 2019-07-09 | 2024-05-28 | 深圳市火乐科技发展有限公司 | Automatic dimming system and projector with same |
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Effective date of registration: 20160922 Address after: Qixia District of Nanjing City, Jiangsu province 210023 horses Street purple Road No. 1 Building 5 Applicant after: Nanjing Star Electronics Co., Ltd. Address before: 210007, Qinhuai District, Jiangsu, Nanjing No. 100, No. 12-1003, Rong Tai Villa Applicant before: Li Qiang |
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Effective date of registration: 20161116 Address after: 214135 Jiangsu New District of Wuxi City Linghu Road No. 111 Wuxi Software Park, whale building C Room 301 Applicant after: WUXI SIRISE MICROELECTRONICS CO., LTD. Address before: Qixia District of Nanjing City, Jiangsu province 210023 horses Street purple Road No. 1 Building 5 Applicant before: Nanjing Star Electronics Co., Ltd. |
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WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20160824 |