CN105792443A - Power supply circuit for driving IC in LED power source - Google Patents
Power supply circuit for driving IC in LED power source Download PDFInfo
- Publication number
- CN105792443A CN105792443A CN201610293211.8A CN201610293211A CN105792443A CN 105792443 A CN105792443 A CN 105792443A CN 201610293211 A CN201610293211 A CN 201610293211A CN 105792443 A CN105792443 A CN 105792443A
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- driving
- power supply
- led
- vin
- diode
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
-
- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention relates to the technical field of LED power supply, and particularly relates to a power supply circuit for a driving IC in an LED power source. The power supply circuit is simple in circuit structure. Power supply voltage of the driving IC is not influenced by change of the number of load LEDs. The Vin end of the driving IC is connected with a power source Vin through a resistor R1 and a switch SW. The power supply circuit is characterized in that the Vin end of the driving IC is also connected with one end of a capacitor C0. The other end of the capacitor C0 is connected with the GND end of the driving IC, one end of an electric inductor L, the negative electrode of a diode D1 and the emission electrode of a triode Q1. The base electrode of the triode Q1 is connected with the driving end of the driving IC. The collection electrode of the triode Q1 is connected with the resistor R1 and the switch SW. The other end of the electric inductor L is connected in series with at least four load LEDs and then grounded. At least three load LEDs of the side of the grounding end form a power supply LED string. At least one load LED is arranged between the power supply LED string and the electric inductor L. The Vin end of the driving IC is also connected with the negative electrode of a diode D2. The positive electrode of the diode D2 is connected with the positive electrode of the power supply LED string.
Description
Technical field
The present invention relates to LED power power supply technique field, be specially in a kind of LED power for driving IC power supply circuits.
Background technology
In current non-isolated LED power, after high voltage startup, it be typically with auxiliary winding to driving IC to power, this point makes power supply become complicated, especially during load LED number of variations, auxiliary winding also needs change therewith, causes transformator suitable power narrow scope, cannot use standardization inductance simultaneously.
Summary of the invention
In order to solve the problems referred to above, the invention provides for driving IC power supply circuits in a kind of LED power, its
Circuit structure is simple, does not affect the supply voltage driving IC during load LED number of variations.
nullIts technical scheme is such that in a kind of LED power for driving IC power supply circuits，It includes driving IC，The Vin end of the described IC of driving connects power supply Vin by resistance R1 and switch SW，It is characterized in that，The described Vin end driving IC is also connected with electric capacity C0 one end，The described electric capacity C0 other end connects the described GND end driving IC、Inductance L one end、The negative pole of diode D1、The emitter stage of audion Q1，The base stage of described audion Q1 connects the described drive end driving IC，The colelctor electrode of described audion Q1 connects described resistance R1 and described switch SW，The described inductance L other end is connected in series ground connection after at least four load LED，At least three load LED of this earth terminal side forms power supply LED strip，A described load LED is had at least between described power supply LED strip and described inductance L，The described Vin end driving IC is also connected with the negative pole of diode D2，The positive pole of described diode D2 connects the positive pole of described power supply LED strip.
After adopting the power supply circuits of the present invention, utilize the stabilizing voltage characteristic of LED, after LED conducting, electricity terminal voltage is 3.2 stable ~ 3.6V, can be seen as a Zener diode, select the LED closing quantity to form power supply LED strip as required, give this power supply LED strip and drive IC to power.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention；
Fig. 2 is the Application Example of the present invention.
Detailed description of the invention
nullAs shown in Figure 1，For driving IC power supply circuits in a kind of LED power，It includes driving IC，The Vin end driving IC connects power supply Vin by resistance R1 and switch SW，The Vin end driving IC is also connected with electric capacity C0 one end，The electric capacity C0 other end connects the GND end driving IC、Inductance L one end、The negative pole of diode D1、The emitter stage of audion Q1，Audion Q1 here selects switching tube，The base stage of audion Q1 connects the drive end driving IC，The colelctor electrode of audion Q1 connects resistance R1 and switch SW，The inductance L other end is connected in series ground connection after N number of load LED，N here is greater than the integer of 4，Three load LED of this earth terminal side form power supply LED strip，Two load LED are had at least between power supply LED strip and inductance L，The Vin end driving IC is also connected with the negative pole of diode D2，The positive pole of diode D2 connects the positive pole of power supply LED strip，The voltage of 9.6 ~ 10.8V now can be provided，When LED strip of powering has four load LED，The running voltage of 12.8 ~ 14.4V then can be provided，The LED quantity of power supply LED strip is selected according to the different IC that drives.
Its operation principle is as described below: assuming the initial T0 moment, switch SW is off, and does not namely all have electric current in whole circuit.
In the T1 moment, switch SW closes, then have electric current to flow through R1-> C0-> L-> LEDn-> ...-> LED3-> LED2-> LED1-> GND, charge to electric capacity C0, diode D1, diode D2 end.
The T2 moment, when electric capacity C0 both end voltage reaches the startup voltage driving IC, IC is driven to start working, switching tube Q1 is driven to open, electric current flows through Q1-> L-> LEDn-> ...-> LED3-> LED2-> LED1-> GND, namely load LED all lights, and on electric capacity C0, voltage declines because driving switching tube Q1 loss and oneself power consumption simultaneously.
nullThe T3 moment，When on switching tube Q1, electric current reaches a setting value，IC is driven to drive closing switch pipe Q1，In switching tube Q1, electric current is 0，Owing to inductive current must be continuously，At this moment have electric current L-> LEDn-> ...-> LED3-> LED2-> LED1-> GND-> D1-> L，IC represents that C0 and IC is in parallel to L-> LEDn-> D2-> R2-> C0 | | IC-> L(C0 | |)，Namely when inductance L flyback，Achieve to driving IC to power，Namely bootstrap charge circuit is achieved，And supply voltage is LED3、LED2、Tri-LED pressure drop sums of LED1，Usual white light LEDs pressure drop is 3.2 ~ 3.6V，So can ensure to drive the IC operating at voltages being in 9.6 ~ 10.8V，If needing other voltage，The position to take power in LED strip can be changed.When the LED number that load is always connected changes, do not affect the supply voltage driving IC.
As shown in Figure 2, one for applying the power supply circuits of the present invention is embodied as circuit, namely utilizes the non-isolated LED drive power of SY5814A.
Claims (1)
- null1. for driving IC power supply circuits in a LED power，It includes driving IC，The Vin end of the described IC of driving connects power supply Vin by resistance R1 and switch SW，It is characterized in that，The described Vin end driving IC is also connected with electric capacity C0 one end，The described electric capacity C0 other end connects the described GND end driving IC、Inductance L one end、The negative pole of diode D1、The emitter stage of audion Q1，The base stage of described audion Q1 connects the described drive end driving IC，The colelctor electrode of described audion Q1 connects described resistance R1 and described switch SW，The described inductance L other end is connected in series ground connection after at least four load LED，At least three load LED of this earth terminal side forms power supply LED strip，A described load LED is had at least between described power supply LED strip and described inductance L，The described Vin end driving IC is also connected with the negative pole of diode D2，The positive pole of described diode D2 connects the positive pole of described power supply LED strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293211.8A CN105792443B (en) | 2016-05-06 | 2016-05-06 | It is driving IC power supply circuits in a kind of LED power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293211.8A CN105792443B (en) | 2016-05-06 | 2016-05-06 | It is driving IC power supply circuits in a kind of LED power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105792443A true CN105792443A (en) | 2016-07-20 |
| CN105792443B CN105792443B (en) | 2017-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610293211.8A Active CN105792443B (en) | 2016-05-06 | 2016-05-06 | It is driving IC power supply circuits in a kind of LED power |
Country Status (1)
| Country | Link |
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| CN (1) | CN105792443B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108112120A (en) * | 2017-12-16 | 2018-06-01 | 无锡昌至盛机械制造有限公司 | A kind of high-voltage high-speed start-up circuit of low-power consumption |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120217884A1 (en) * | 2011-02-28 | 2012-08-30 | Minebea Co., Ltd. | Control circuit for light emitting diode arrangements |
| CN103139982A (en) * | 2011-12-05 | 2013-06-05 | Rfsemi科技有限公司 | Alternating current direct-coupled type light-emitting diode lighting apparatus |
| CN103155709A (en) * | 2010-10-06 | 2013-06-12 | 功率芯片有限公司 | Light-emitting diode driving circuit for lighting |
| CN204652210U (en) * | 2015-05-18 | 2015-09-16 | 绍兴标新机电科技有限公司 | A kind of inverter generator controllable silicon drives bootstrapping power supply circuits |
| CN204761772U (en) * | 2015-06-02 | 2015-11-11 | 六安市智奇工业设计有限公司 | High -efficient LED |
| CN205124080U (en) * | 2015-11-16 | 2016-03-30 | 江苏力行电力电子科技有限公司 | LED driving circuit |
-
2016
- 2016-05-06 CN CN201610293211.8A patent/CN105792443B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155709A (en) * | 2010-10-06 | 2013-06-12 | 功率芯片有限公司 | Light-emitting diode driving circuit for lighting |
| US20120217884A1 (en) * | 2011-02-28 | 2012-08-30 | Minebea Co., Ltd. | Control circuit for light emitting diode arrangements |
| CN103139982A (en) * | 2011-12-05 | 2013-06-05 | Rfsemi科技有限公司 | Alternating current direct-coupled type light-emitting diode lighting apparatus |
| CN204652210U (en) * | 2015-05-18 | 2015-09-16 | 绍兴标新机电科技有限公司 | A kind of inverter generator controllable silicon drives bootstrapping power supply circuits |
| CN204761772U (en) * | 2015-06-02 | 2015-11-11 | 六安市智奇工业设计有限公司 | High -efficient LED |
| CN205124080U (en) * | 2015-11-16 | 2016-03-30 | 江苏力行电力电子科技有限公司 | LED driving circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108112120A (en) * | 2017-12-16 | 2018-06-01 | 无锡昌至盛机械制造有限公司 | A kind of high-voltage high-speed start-up circuit of low-power consumption |
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| Publication number | Publication date |
|---|---|
| CN105792443B (en) | 2017-07-07 |
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Address after: 214000 Jiangsu Province, Wuxi City Lake Ehu town Xishan District Road No. 6 Patentee after: Xiong Xiaodan Address before: 214112 Jiangsu city of Wuxi province new village Wu Qumei No. 210 Xinzhou Road Patentee before: Xiong Xiaodan |
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Effective date of registration: 20220831 Address after: Room 408-11, 4th Floor, Building 1#, No. 10 Fengde Road, Jinfeng Town, Jiulongpo District, Chongqing 401329 Patentee after: Chongqing Xinxinyuan Technology Co.,Ltd. Address before: 214000 No. 6, e Hu Road, Xishan, Wuxi, Jiangsu Patentee before: Xiong Xiaodan |