CN201430714Y - Led driver - Google Patents
Led driver Download PDFInfo
- Publication number
- CN201430714Y CN201430714Y CN2009201332901U CN200920133290U CN201430714Y CN 201430714 Y CN201430714 Y CN 201430714Y CN 2009201332901 U CN2009201332901 U CN 2009201332901U CN 200920133290 U CN200920133290 U CN 200920133290U CN 201430714 Y CN201430714 Y CN 201430714Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- control unit
- current
- pwm control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
Landscapes
- Rectifiers (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses an LED driver, which comprises an input rectified filter circuit, a voltage switching circuit, an output rectified filter circuit, a PFC/PWM control circuit, a switch driving circuit, a voltage feedback circuit and a constant current sampling feedback circuit. The PFC/PWM control circuit comprises a PWM control unit and a PFC control unit, wherein the PWM control unit drives a switch circuit according to signals which are related to working voltage and current and fed back by the voltage feedback circuit and the constant current sampling feedback circuit and adjustsoutput voltage of the voltage switching circuit so as to realize precise adjustment for the working voltage and current of an LED light source; the PFC control unit adjusts phase difference between input current and input voltage to improve power factor.
Description
Technical field
The utility model relates to the LED lighting technical field, refers in particular to a kind of led driver.
Background technology
Led light source has plurality of advantages such as low energy consumption, environmental protection, long service life, and progressively replaces conventional light source in the application such as aspects such as illuminations, becomes the solid state lighting electric light source of a new generation.For performance and the minimizing failure rate of giving full play to the LED lighting device, used driver fibrous root designs according to the LED self-characteristic, to satisfy the required driving requirement of LED work as far as possible.Yet; the performance of present various led drivers is unsatisfactory; as State Intellectual Property Office on October 26th, 2005 disclosed application number be disclosed led drive circuit in 200510013232.1 the patent application document; this led drive circuit is by a rectification circuit; one is series at the step-down current-limiting circuit that is made of inductance coil of the AC side of this rectification circuit; one filter circuit and that is made of electric capacity that is parallel to the DC side of this rectification circuit constitutes the voltage-limiting protection circuit by voltage stabilizing didoe and forms; step-down by described step-down current-limiting circuit converts low-voltage AC output to from the 220V alternating current of electrical network; form direct current through described rectification circuit rectification, again through the filtering of described filter circuit and be used for the driving LED array behind the direct current more stably.The fluctuation of the drive current that the led drive circuit of said structure can't cause the fluctuation because of external voltage is adjusted, and easily because of the instability of drive current influences the reliability of LED lighting device, even the situation of led array occurs burning out.In addition, adopt the led drive circuit of said structure, the same phasic property between the voltage of input and electric current is relatively poor, and power factor is lower, and the utilization ratio of electric energy is relatively poor.
Summary of the invention
The purpose of this utility model is to overcome the existing existing defective of led driver, and a kind of led driver that can accurately adjust and can improve utilization of power efficient to operating voltage and electric current is provided.
For achieving the above object, the utility model by following technical solution, a kind of led driver includes: an input rectifying filter circuit is used for that the alternating current of being imported is carried out rectification and handles and convert direct current to and to exporting after the direct current filtering; One voltage conversion circuit, its input is connected with the output of described input rectifying filter circuit, under the control of the switch promotion circuit that is attached thereto the direct current that comes from described input rectifying filter circuit is carried out voltage transitions and forms alternating current; One output rectifier and filter is connected between described voltage conversion circuit and the led light source, to voltage conversion circuit the alternating current exported carry out rectification, filtering rear drive led light source; One PFC/PWM control circuit, include a PFC control unit and a PWM control unit, wherein, the PFC control unit is connected with voltage conversion circuit, be used to adjust phase difference between input current and the input voltage to improve power factor, the PWM control unit promotes circuit with switch and is connected the output voltage of the described voltage conversion circuit of driving switch circuit adjustment; One voltage feedback circuit, insert between described output rectifier and filter and PWM control unit, gather the voltage signal of described output rectifier and filter, and feed back to described PWM control unit after relatively, to regulate the output voltage of described voltage conversion circuit with a reference voltage; One constant current sampling feedback circuit is gathered the current signal of described rectification filter circuit output end and the current signal of led light source output respectively, with both relatively and feed back to described PWM control unit, and to regulate the output voltage of described voltage conversion circuit.
In the above-mentioned led driver, the input of described input rectifying filter circuit has access to an EMI filtering circuit.
In the above-mentioned led driver, described led driver also includes a PWM light adjusting controller that is connected in led light source.
Compare with existing led driver, the beneficial effects of the utility model are: led driver is provided with PFC/PWM control circuit, voltage feedback circuit and constant current sampling feedback circuit, wherein, the PWM control unit of PFC/PWM control circuit can be according to the signal driving switch circuit that is relevant to operating voltage and electric current that voltage feedback circuit and constant current sampling feedback circuit fed back and the output voltage of regulation voltage change-over circuit, realization makes the work of led light source more stable to the operating voltage of led light source and the accurate adjustment of electric current; In addition, led driver also is provided with the PFC control unit that is used to adjust the phase difference between input voltage and electric current, make to have higher power factor, thus the utilization ratio of raising electric energy.
Description of drawings
Fig. 1 is the block diagram of the utility model led driver.
Embodiment
For making those of ordinary skill in the art be expressly understood the purpose of this utility model, technical scheme and advantage more, the utility model is further elaborated below in conjunction with drawings and Examples.
The disclosed led driver of the utility model can be applicable to lighting device, particularly high-power LED lighting such as LED shot-light, LED emergency light etc.Consult shown in Figure 1ly, this led driver mainly promotes circuit 18, a voltage feedback circuit 20 and a constant current sampling feedback circuit 22 by an input rectifying filter circuit 10, a voltage conversion circuit 12, an output rectifier and filter 14, a PFC/PWM control circuit 16, a switch.
The input of input rectifying filter circuit 10 is connected with external power source network 24 such as civil power etc., and the alternating current that is used for the being imported 220V alternating current of electrical network (for example from) carries out rectification to be handled and convert direct current to and to exporting after the direct current filtering.
The input of voltage conversion circuit 12 is connected with the output of described input rectifying filter circuit 10, and it carries out voltage transitions to the pulse direct current that comes from input rectifying filter circuit 10 and forms alternating current under the control of the switch promotion circuit 18 that is attached thereto.
Output rectifier and filter 14 is connected between described voltage conversion circuit 12 and the led light source 26, its alternating current that voltage conversion circuit 12 is exported carries out rectification, filtering is used to drive the led light source 26 that is attached thereto after forming direct current, makes it luminous and play the usefulness of illumination.Usually, led light source 26 adopts a plurality of led chip series connection and constitutes.
PFC/PWM control circuit 16 includes a PFC control unit 160 and a PWM control unit 162, wherein, PFC control unit 160 is connected with voltage conversion circuit 12, its current signal of gathering voltage conversion circuit 12 is to adjust the phase difference between input current and the input voltage, PWM control unit 162 promotes circuit 18 with switch and is connected, and its driving switch promotes circuit 18 by adjusting duty ratio to regulate the output voltage of described voltage conversion circuit 12.
Constant current sampling feedback circuit 22 is gathered the current signal of current rectifying and wave filtering circuit 14 outputs and the current signal of led light source 26 outputs respectively, with both relatively and feed back to PWM control unit 162, to regulate the output voltage of described voltage conversion circuit 12, realize the constant of drive current.
Preferably, input at input rectifying filter circuit 10 has access to an EMI filtering circuit 28, it is used for the noise that outside electric power network is produced and the noise that self produced suppressed, eliminate external power source network and led driver influencing each other between the two, improve the antijamming capability and the stability of led driver.
Preferably, led driver also includes a PWM light adjusting controller 30 that is connected in led light source 26, its be used to adjust flow through led light source 26 electric current and realize regulating the luminosity of led light source 26.
Above-mentioned only is preferred embodiment of the present utility model; but not the utility model is done any pro forma restriction; for example; those of ordinary skill can be changed on the basis of foregoing circuit or be modified; all equivalent variations or modifications of being done in the claim scope all should fall within the utility model protection range.
Claims (3)
1, a kind of led driver is characterized in that, described led driver includes:
One input rectifying filter circuit (10) is used for that the alternating current of being imported is carried out rectification and handles and convert direct current to and to exporting after the direct current filtering;
One voltage conversion circuit (12), its input is connected with the output of described input rectifying filter circuit (10), under the control of the switch promotion circuit (18) that is attached thereto the direct current that comes from described input rectifying filter circuit (10) is carried out voltage transitions and forms alternating current;
One output rectifier and filter (14) is connected between described voltage conversion circuit (12) and the led light source (26), and the alternating current that voltage conversion circuit (12) is exported carries out rectification, filtering rear drive led light source (26);
One PFC/PWM control circuit (16), include a PFC control unit (160) and a PWM control unit (162), wherein, PFC control unit (160) is connected with voltage conversion circuit (12), be used to adjust phase difference between input current and the input voltage to improve power factor, PWM control unit (162) promotes circuit (18) with switch and is connected, and driving switch circuit (18) is regulated the output voltage of described voltage conversion circuit (12);
One voltage feedback circuit (20), insert between described output rectifier and filter (14) and PWM control unit (162), gather the voltage signal of described output rectifier and filter (14), and feed back to described PWM control unit (162) after relatively with a reference voltage, to regulate the output voltage of described voltage conversion circuit (12);
One constant current sampling feedback circuit (22), gather the current signal of described current rectifying and wave filtering circuit (14) output and the current signal of led light source (26) output respectively, with both relatively and feed back to described PWM control unit (162), to regulate the output voltage of described voltage conversion circuit (12).
2, led driver as claimed in claim 1 is characterized in that, the input of described input rectifying filter circuit (10) has access to an EMI filtering circuit (28).
3, led driver as claimed in claim 1 or 2 is characterized in that, described led driver also includes a PWM light adjusting controller (30) that is connected in led light source (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201332901U CN201430714Y (en) | 2009-06-26 | 2009-06-26 | Led driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201332901U CN201430714Y (en) | 2009-06-26 | 2009-06-26 | Led driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201430714Y true CN201430714Y (en) | 2010-03-24 |
Family
ID=42034453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201332901U Expired - Lifetime CN201430714Y (en) | 2009-06-26 | 2009-06-26 | Led driver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201430714Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101801145A (en) * | 2010-04-23 | 2010-08-11 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
| CN101835308A (en) * | 2010-04-27 | 2010-09-15 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
| WO2011127638A1 (en) * | 2010-04-12 | 2011-10-20 | 东莞华明灯具有限公司 | Dimmable led driver |
| CN102348307A (en) * | 2010-07-30 | 2012-02-08 | 深圳市桑达实业股份有限公司 | LED street lamp and driving power supply circuit thereof |
| CN102907178A (en) * | 2010-05-27 | 2013-01-30 | 奥斯兰姆施尔凡尼亚公司 | Dimmer conduction angle detection circuit and system incorporating it |
| CN107155232A (en) * | 2017-01-20 | 2017-09-12 | 福州大学 | A kind of High Power Factor LED constant current driving power supply and its control method |
| WO2018232587A1 (en) * | 2017-06-20 | 2018-12-27 | 凤冠电机（深圳）有限公司 | Dimming driving circuit and smart light control led device |
-
2009
- 2009-06-26 CN CN2009201332901U patent/CN201430714Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127638A1 (en) * | 2010-04-12 | 2011-10-20 | 东莞华明灯具有限公司 | Dimmable led driver |
| CN101801145A (en) * | 2010-04-23 | 2010-08-11 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
| CN101801145B (en) * | 2010-04-23 | 2013-08-14 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
| CN101835308A (en) * | 2010-04-27 | 2010-09-15 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
| CN101835308B (en) * | 2010-04-27 | 2013-08-14 | 海洋王照明科技股份有限公司 | Led lamp control circuit and led lamp |
| CN102907178A (en) * | 2010-05-27 | 2013-01-30 | 奥斯兰姆施尔凡尼亚公司 | Dimmer conduction angle detection circuit and system incorporating it |
| CN102907178B (en) * | 2010-05-27 | 2015-02-25 | 奥斯兰姆施尔凡尼亚公司 | Ballast circuit,angle detection circuit and method for light source tuning |
| CN102348307A (en) * | 2010-07-30 | 2012-02-08 | 深圳市桑达实业股份有限公司 | LED street lamp and driving power supply circuit thereof |
| CN102348307B (en) * | 2010-07-30 | 2014-04-09 | 深圳市桑达实业股份有限公司 | LED street lamp and driving power supply circuit thereof |
| CN107155232A (en) * | 2017-01-20 | 2017-09-12 | 福州大学 | A kind of High Power Factor LED constant current driving power supply and its control method |
| WO2018232587A1 (en) * | 2017-06-20 | 2018-12-27 | 凤冠电机（深圳）有限公司 | Dimming driving circuit and smart light control led device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201430714Y (en) | Led driver | |
| CN102769960A (en) | Dimmable type LED (Light Emitting Diode) driver and control method of dimmable type LED driver | |
| CN101848577B (en) | LED driving system and driving method | |
| CN103139992B (en) | With the LED dimming drive system of controllable silicon bypass light adjusting circuit | |
| TWI434622B (en) | Method and apparatus for controlling equivalent resistor value of converter | |
| CN103096586A (en) | Light-dimmer driving circuit | |
| CN104902653A (en) | LED constant-voltage dimming power supply and LED lamp dimming system | |
| CN205454156U (en) | LED power and lamps and lanterns of wireless control's low ripple output of multichannel | |
| CN102695334A (en) | Intelligent light modulation apparatus for LED concentrated direct current power supply system | |
| CN202050563U (en) | Flyback dimming LED (light-emitting diode) drive circuit | |
| CN101969727A (en) | High power LED driving power supply | |
| CN202404873U (en) | Constant voltage and constant current drive circuit of LED display screen | |
| CN102333406A (en) | LED Drivers for Lighting | |
| CN102917499A (en) | DC (Direct Current)/DC-based LED (Light Emitting Diode) driving controller for lighting | |
| CN101600277A (en) | A kind of led circuit | |
| CN201893979U (en) | High-power efficient constant-current light-emitting diode (LED) driver | |
| CN202268152U (en) | Backlight constant-current and constant-voltage driving circuit for display screen | |
| CN104768271A (en) | Automatic dimming LED constant current drive circuit | |
| CN209626665U (en) | Stage Equipment Control system and stage powering shelf | |
| Wang et al. | Design and implementation of a single-stage high-efficacy LED driver with dynamic voltage regulation | |
| CN203504823U (en) | LED drive | |
| CN202587530U (en) | Intelligent light-dimming device of light-emitting diode (LED) centralized direct current supply system | |
| CN203027566U (en) | Light-dimming driving circuit | |
| Liu et al. | A valley-fill driver with current balancing for parallel LED strings used for high-frequency ac power distribution of vehicle | |
| KR102125810B1 (en) | power supply apparatus and method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100324 |
|
| CX01 | Expiry of patent term |