CN205430706U - Sectional type LED drive circuit based on low pressure mode of closing - Google Patents
Sectional type LED drive circuit based on low pressure mode of closing Download PDFInfo
- Publication number
- CN205430706U CN205430706U CN201620271970.XU CN201620271970U CN205430706U CN 205430706 U CN205430706 U CN 205430706U CN 201620271970 U CN201620271970 U CN 201620271970U CN 205430706 U CN205430706 U CN 205430706U
- Authority
- CN
- China
- Prior art keywords
- semiconductor
- oxide
- voltage
- described metal
- current
- 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.)
- Withdrawn - After Issue
Links
Classifications
-
- 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]
Abstract
The utility model discloses a sectional type LED drive circuit based on low pressure mode of closing, it includes: error magnification circuit OP, under -voltage control circuit, MOS pipe M0, current -limiting resistor R0. The utility model discloses a change the control mechanism of current -limiting MOS pipe, through reducing the grid voltage, avoided the MOS pipe to be in not controlled linearity region, effectually restrained the LED scintillation problem that sudden change voltage leads to, in the big voltage input of sudden change, effectively restrain load current, increased the stability of actuating system to and driven antisurge capability, reduced the pressure of LED chip under abominable input voltage environment, increased drive reliability and product life.
Description
Technical field
This utility model belongs to electronic display technology field, particularly to a kind of method eliminating the scintillation effects such as LED.
Background technology
LED light source was used widely in novel energy-conserving light source field with its high efficiency, high integration, high life.In the actual application of LED light source, the LED light source drive scheme without the energy storage device such as inductance, electric capacity is widely applied, and progressively becomes main flow LED light source drive scheme.In such drive scheme, control IC by controlling to turn on electric current and the electric current of LED light source to the regulation of the grid voltage of LED light source channel selector metal-oxide-semiconductor, to make up that LED light source is non-linear and the tetchiness of conducting current versus input voltage that causes, thus reach current limliting purpose.
Fig. 1 shows that typical stagewise LED drives structure, and when input voltage is relatively low, first first paragraph LED is lit.When input voltage gradually rises, after several sections of LED lighted step by step, until final stage LED is lit.In stagewise LED actuation techniques, drive and the compatibility of controllable silicon TRIAC dimmer is the performance indications that user compares concern.Controllable silicon dimmer carrys out the illumination dimmer of regulating load power by the fractional phase of excision input AC electricity, is widely used at European & American Market with its cheap and simple.The compatibility of controllable silicon dimmer and electric filament lamp is preferable, but due to its front end cut characteristic, input voltage has the rising of a step in cut position.Owing to tradition LED drive circuit is when input voltage is not enough to drive first paragraph LED, all of LED controls metal-oxide-semiconductor and is at conducting state, the unexpected rising of this input voltage, causes the switch response of load driving circuits to produce a gibbs vibration.This vibration is a uncontrollable free oscillation, and by input voltage and noise effect, the vibration of different cycles causes LED load changed power.The luminous quantity in this different input cycle changes for Consumer's Experience, it it is a kind of uncontrollable low frequency flicker, this low frequency flicker is obvious especially in some light modulation position, and flicker cycle is about at about 10Hz, and such low frequency flicker is unacceptable for the customer.
Utility model content
The purpose of this utility model is: provide a kind of stagewise LED drive circuit based on low pressure " shut " mode", further increases the stability of drive system, and the Surge handling capability driven, reduces LED chip pressure under severe input voltage environment.
The technical solution of the utility model is: a kind of stagewise LED drive circuit based on low pressure " shut " mode", and it includes: error amplifying circuit OP, under-voltage control circuit, metal-oxide-semiconductor M0, current-limiting resistance R0；
Described error amplifying circuit OP passes through described current-limiting resistance R0, gathers the drain voltage of described metal-oxide-semiconductor M0, and carries out differential amplification with reference voltage Vref, provides voltage to the grid of described metal-oxide-semiconductor M0；
Described under-voltage control circuit coordinates with described error amplifying circuit OP, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduces the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
A kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP1, error amplifying circuit OP2, metal-oxide-semiconductor M0, current-limiting resistance R0, divider resistance R1, divider resistance R2；
Described error amplifying circuit OP1, described error amplifying circuit OP2, described current-limiting resistance R0, described divider resistance R1, described divider resistance R2, for detecting described metal-oxide-semiconductor M0 drain current, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the drain current of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
A kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP1, error amplifying circuit OP2, under-voltage control circuit, metal-oxide-semiconductor M0, current-limiting resistance R0, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, for detecting input voltage, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
A kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP, delay circuit, metal-oxide-semiconductor M0, current-limiting resistance R0；
Described error amplifying circuit OP passes through described current-limiting resistance R0, gathers the drain voltage of described metal-oxide-semiconductor M0, and carries out differential amplification with reference voltage Vref, provides voltage to the grid of described metal-oxide-semiconductor M0；
Described delay circuit is placed in described error amplifying circuit OP prime, for increasing the grid voltage rise time, steady load electric current, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
This utility model utilizes suppression controllable silicon cut position voltage to raise suddenly the current oscillation caused to eliminate the scintillation effect of LED, when driving input voltage relatively low, reduces mos gate pole tension, until metal-oxide-semiconductor is in saturated or closed mode；Control gate voltage is carried out, it is achieved reduce grid voltage at low input by detection metal-oxide-semiconductor drain voltage；Control gate voltage is carried out, to realize reducing grid voltage at low input by detection metal-oxide-semiconductor source current；Control gate voltage is carried out, to realize reducing grid voltage at low input by detection input voltage；Pass through delay circuit, the increase grid voltage rise time further suppress the vibration of LED load electric current, further increase the stability of drive system, and the Surge handling capability driven, reduce LED chip pressure under severe input voltage environment, add driving reliability and life of product.
Accompanying drawing explanation
Fig. 1 is that typical stagewise LED drives structure；
Fig. 2 is by detection drain voltage, this utility model judges whether metal-oxide-semiconductor is operated in the circuit theory diagrams of the range of linearity；
Fig. 3 is by detection source electric current, this utility model judges whether metal-oxide-semiconductor is operated in the circuit theory diagrams of the range of linearity；
Fig. 4 is by detection input voltage, this utility model judges whether metal-oxide-semiconductor is operated in the circuit theory diagrams of the range of linearity；
Fig. 5 is that this utility model prevents LED current generation oscillating circuit schematic diagram by increasing delay circuit.
Detailed description of the invention
Embodiment 1: participating in Fig. 2, a kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP, under-voltage control circuit, metal-oxide-semiconductor M0, current-limiting resistance R0；
Described error amplifying circuit OP passes through described current-limiting resistance R0, gathers the drain voltage of described metal-oxide-semiconductor M0, and carries out differential amplification with reference voltage Vref, provides voltage to the grid of described metal-oxide-semiconductor M0；
Described under-voltage control circuit coordinates with described error amplifying circuit OP, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduces the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
Embodiment 2: participating in Fig. 3, a kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP1, error amplifying circuit OP2, metal-oxide-semiconductor M0, current-limiting resistance R0, divider resistance R1, divider resistance R2；
Described error amplifying circuit OP1, described error amplifying circuit OP2, described current-limiting resistance R0, described divider resistance R1, described divider resistance R2, for detecting described metal-oxide-semiconductor M0 drain current, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the drain current of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
Embodiment 3: participate in Fig. 4, a kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP1, error amplifying circuit OP2, under-voltage control circuit, metal-oxide-semiconductor M0, current-limiting resistance R0, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, for detecting input voltage, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
Embodiment 4: participating in Fig. 5, a kind of stagewise LED drive circuit based on low pressure " shut " mode", it includes: error amplifying circuit OP, delay circuit, metal-oxide-semiconductor M0, current-limiting resistance R0；
Described error amplifying circuit OP passes through described current-limiting resistance R0, gathers the drain voltage of described metal-oxide-semiconductor M0, and carries out differential amplification with reference voltage Vref, provides voltage to the grid of described metal-oxide-semiconductor M0；
Described delay circuit is placed in described error amplifying circuit OP prime, for increasing the grid voltage rise time, steady load electric current, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
Claims (4)
1. a stagewise LED drive circuit based on low pressure " shut " mode", it is characterised in that it includes: error amplifying circuit OP, under-voltage control circuit, metal-oxide-semiconductor M0, current-limiting resistance R0；
Described error amplifying circuit OP passes through described current-limiting resistance R0, gathers the drain voltage of described metal-oxide-semiconductor M0, and carries out differential amplification with reference voltage Vref, provides voltage to the grid of described metal-oxide-semiconductor M0；
Described under-voltage control circuit coordinates with described error amplifying circuit OP, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduces the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
2. a stagewise LED drive circuit based on low pressure " shut " mode", it is characterised in that it includes: error amplifying circuit OP1, error amplifying circuit OP2, metal-oxide-semiconductor M0, current-limiting resistance R0, divider resistance R1, divider resistance R2；
Described error amplifying circuit OP1, described error amplifying circuit OP2, described current-limiting resistance R0, described divider resistance R1, described divider resistance R2, for detecting described metal-oxide-semiconductor M0 drain current, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the drain current of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
3. a stagewise LED drive circuit based on low pressure " shut " mode", it is characterized in that, it includes: error amplifying circuit OP1, error amplifying circuit OP2, under-voltage control circuit, metal-oxide-semiconductor M0, current-limiting resistance R0, divider resistance R1, divider resistance R2, divider resistance R3, divider resistance R4, for detecting input voltage, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
4. a stagewise LED drive circuit based on low pressure " shut " mode", it is characterised in that it includes: error amplifying circuit OP, delay circuit, metal-oxide-semiconductor M0, current-limiting resistance R0；
Described error amplifying circuit OP passes through described current-limiting resistance R0, gathers the drain voltage of described metal-oxide-semiconductor M0, and carries out differential amplification with reference voltage Vref, provides voltage to the grid of described metal-oxide-semiconductor M0；
Described delay circuit is placed in described error amplifying circuit OP prime, for increasing the grid voltage rise time, steady load electric current, when described metal-oxide-semiconductor M0 is in linear condition, persistently reduce the grid voltage of described metal-oxide-semiconductor M0, until described metal-oxide-semiconductor M0 reaches saturation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620271970.XU CN205430706U (en) | 2016-04-05 | 2016-04-05 | Sectional type LED drive circuit based on low pressure mode of closing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620271970.XU CN205430706U (en) | 2016-04-05 | 2016-04-05 | Sectional type LED drive circuit based on low pressure mode of closing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205430706U true CN205430706U (en) | 2016-08-03 |
Family
ID=56522253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620271970.XU Withdrawn - After Issue CN205430706U (en) | 2016-04-05 | 2016-04-05 | Sectional type LED drive circuit based on low pressure mode of closing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205430706U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657915A (en) * | 2016-04-05 | 2016-06-08 | 易美芯光（北京）科技有限公司 | Segmented LED drive circuit based on low-voltage off mode |
-
2016
- 2016-04-05 CN CN201620271970.XU patent/CN205430706U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657915A (en) * | 2016-04-05 | 2016-06-08 | 易美芯光（北京）科技有限公司 | Segmented LED drive circuit based on low-voltage off mode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9142962B2 (en) | Wall box device for managing energy | |
| CN200997700Y (en) | Large-power driving chip of LED light | |
| FI20031580A (en) | Method and arrangement for inverter | |
| TW201127189A (en) | High efficiency low power capacitor charged DC driver | |
| CN205430706U (en) | Sectional type LED drive circuit based on low pressure mode of closing | |
| CN104080225A (en) | Constant current source circuit and illumination device | |
| KR101365307B1 (en) | Switching power supply circuit for LED lighting equipment | |
| CN105657915A (en) | Segmented LED drive circuit based on low-voltage off mode | |
| US9961727B2 (en) | Phase control dimmer circuit | |
| CN101801133A (en) | Driving power supply circuit of LED lamp | |
| CN104427692A (en) | Light-controlled automatic switch circuit and lamp | |
| CN201503817U (en) | Improved control loop of electronic contactor | |
| CN203934046U (en) | A kind of LED drive circuit | |
| CN101820706B (en) | Device and method for dimming light sources | |
| CN103841697A (en) | IC chip and control circuit of LED directly driven by electronic ballast | |
| TW201334625A (en) | AC LED driver circuit for high-voltage AC power source | |
| CN201967198U (en) | LED lamp driving power circuit | |
| CN205430723U (en) | Intelligence constant current LED drive circuit | |
| CN201639826U (en) | LED lamp driving power circuit | |
| CN204014207U (en) | Non-isolation type LED constant-current driven chip circuit | |
| CN208590135U (en) | A kind of thermal-shutdown circuit of LED drive circuit | |
| CN109640448B (en) | Constant current feedback control circuit | |
| CN203984739U (en) | Touch table lamp with an automatic light meter | |
| TWI552645B (en) | Dimming circuit | |
| CN209767865U (en) | LED lamp tube device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20171205 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20171205 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |