CN209710378U - A kind of invariable power linear constant current LED bulb - Google Patents
A kind of invariable power linear constant current LED bulb Download PDFInfo
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- CN209710378U CN209710378U CN201822103483.4U CN201822103483U CN209710378U CN 209710378 U CN209710378 U CN 209710378U CN 201822103483 U CN201822103483 U CN 201822103483U CN 209710378 U CN209710378 U CN 209710378U
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model discloses a kind of invariable power linear constant current LED bulbs, including overcurrent protective switch F1, AC/DC switches rectifying circuit, filtered circuit is released route, switch outlet line inside IC, Power auto-adjustment function route, export current control circuit and LED light source working line, the AC/DC switching rectifying circuit includes rectifier bridge stack DB1, one end of the overcurrent protective switch F1 is connect with the end alternating current L, the other end of the overcurrent protective switch F1 is connect with 3 feet of rectifier bridge stack DB1, 1 foot of the rectifier bridge stack DB1 is connect with alternating current N-terminal, the AC/DC switching rectifying circuit is connected to switching outlet line connection inside IC, the utility model is at low cost, constant current output effect is good；When voltage fluctuation, stable output power is constant；Route is simple, and failure rate is extremely low；Independent internal electric source driving is not needed, power circuit and LED light source concentrate on aluminium base plate surface, manufacturing process and simple process, high degree of automation.
Description
Technical field
The utility model relates to technical field of lighting fixtures, specially a kind of invariable power linear constant current LED bulb.
Background technique
Currently, linear constant current technical solution is obtained in middle low power LED constant current system with its simple system structure
Be widely used, at present common linear constant current scheme, as depicted in figs. 1 and 2, including rectification circuit, constant-current drive circuit and
LED load, constant current output Iout=Vref/Rcs.This application scheme is system knot relative to Switching Power Supply scheme advantage
Structure is simple, few using component, and disadvantage is that the quantity of system load LED light must be designed in strict accordance with input voltage, defeated
The variation for entering voltage will lead to the variation of whole system input power, to influence the efficiency of system and the light efficiency of LED light, be
This, proposes a kind of invariable power linear constant current LED bulb.
Utility model content
The purpose of this utility model is to provide a kind of invariable power linear constant current LED bulbs, to solve above-mentioned background technique
The problem of middle proposition.
To achieve the above object, the utility model provides the following technical solutions: a kind of invariable power linear constant current LED bulb,
Including overcurrent protective switch F1, AC/DC switching rectifying circuit, filtered circuit release route, switch outlet line, function inside IC
Rate automatic regulation function route, output current control circuit and LED light source working line, the AC/DC switch rectifying circuit packet
Rectifier bridge stack DB1 is included, one end of the overcurrent protective switch F1 is connect with the end alternating current L, and the overcurrent protective switch F1's is another
End is connect with 3 feet of rectifier bridge stack DB1, and 1 foot of the rectifier bridge stack DB1 is connect with alternating current N-terminal, the AC/DC switching rectification
Connection switching outlet line connection inside IC, the inside IC switching outlet line and Power auto-adjustment functional line
Road, output current control circuit are connected with LED light source working line, and switching outlet line includes that single hop is linearly permanent inside the IC
Power IC.
Preferred: the linear invariable power IC of single hop includes that GND pin, REXT pin, the hanging pin of four groups of NC, OUT draw
Foot and VD pin, filtered circuit route of releasing includes safety capacitor CX1, and the LED light source working line includes LED1-12
Lamp bead, the inside the IC switching outlet line further includes resistance R1, resistance RD1, resistance RS1, capacitor C1.
It is preferred: 2 feet of the rectifier bridge stack DB1 simultaneously with resistance R1, safety capacitor CX1 and LED1-12 lamp bead one
End connection, the resistance R1 and safety capacitor CX1 are parallel with one another；The REXT pin and resistance of the linear invariable power IC of single hop
One end of RS1 connects, and the OUT pin is connect with one end of the capacitor C1, the VD pin pass through the RD1 with it is described
The other end of LED1-12 lamp bead connects, 2 feet, safety capacitor CX1, resistance R1, resistance RS1 and the capacitor of the rectifier bridge stack DB1
The other end of C1 is grounded.
Preferred: the overcurrent protective switch F1 is fuse/PTC thermistor.
It is preferred: the model ZX1005B of the linear invariable power IC of single hop.
Preferred: the inside of the ZX1005B drive control chip is by power supply, One Time Programmable device, mid-point voltage, perseverance
Stream and logic controller and high-pressure MOS composition, the power supply are connect with the One Time Programmable device and mid-point voltage respectively, institute
It states One Time Programmable device and mid-point voltage to connect with the constant current and logic controller, the OUT pin connects to power supply, institute
It states OUT pin to connect with One Time Programmable device and mid-point voltage respectively by high-pressure MOS, the mid-point voltage and VD foot connect
It connects, the REXT pin is connect with constant current and logic controller.
Compared with prior art, the utility model has the beneficial effects that the utility model is at low cost, constant current output effect
It is good；When voltage fluctuation, stable output power is constant；Route is simple, and failure rate is extremely low；Independent internal electric source driving, electricity are not needed
Source route and LED light source concentrate on aluminium base plate surface, manufacturing process and simple process, high degree of automation.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the IC pin distribution map of the utility model；
Fig. 3 is the IC internal frame diagram of the utility model；
Fig. 4 is the electrical principle frame diagram of the utility model；
Fig. 5 is the pcb board schematic diagram of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment
Fig. 1-5 is please referred to, the utility model provides a kind of technical solution: a kind of invariable power linear constant current LED light bulb, packet
Include overcurrent protective switch F1, AC/DC switching rectifying circuit, filtered circuit release route, switch outlet line, power inside IC
Automatic regulation function route, output current control circuit and LED light source working line, the AC/DC switching rectifying circuit include
One end of rectifier bridge stack DB1, the overcurrent protective switch F1 are connect with the end alternating current L, the other end of the overcurrent protective switch F1
It is connect with 3 feet of rectifier bridge stack DB1,1 foot of the rectifier bridge stack DB1 is connect with alternating current N-terminal, and the AC/DC switches rectified line
Road is connected to switching outlet line connection inside IC, switching outlet line and Power auto-adjustment function route inside the IC,
Output current control circuit is connected with LED light source working line, and switching outlet line includes single hop linearly permanent function inside the IC
Rate IC.
Specific in the present embodiment: the linear invariable power IC of single hop includes GND pin, REXT pin, four groups of NC hanging
Pin, OUT pin and VD pin, filtered circuit route of releasing includes safety capacitor CX1, the LED light source working line
Including LED1-12 lamp bead, switching outlet line further includes resistance R1, resistance RD1, resistance RS1, capacitor C1 inside the IC.
It is specific in the present embodiment: 2 feet of the rectifier bridge stack DB1 simultaneously with resistance R1, safety capacitor CX1 and LED1-
One end of 12 lamp beads connects, and the resistance R1 and safety capacitor CX1 are parallel with one another；The REXT of the linear invariable power IC of single hop draws
Foot is connect with one end of resistance RS1, and the OUT pin is connect with one end of the capacitor C1, and the VD pin passes through the RD1
It is connect with the other end of the LED1-12 lamp bead, 2 feet, safety capacitor CX1, the resistance R1, resistance RS1 of the rectifier bridge stack DB1
It is grounded with the other end of capacitor C1.
Specific in the present embodiment: the overcurrent protective switch F1 is fuse/PTC thermistor.
It is specific: the model ZX1005B of the linear invariable power IC of single hop in the present embodiment.
It is specific in the present embodiment: the inside of the ZX1005B drive control chip by power supply, One Time Programmable device,
Mid-point voltage, constant current and logic controller and high-pressure MOS composition, the power supply respectively with the One Time Programmable device and midpoint
Voltage connection, the One Time Programmable device and mid-point voltage connect with the constant current and logic controller, the OUT pin and
Power supply connection, the OUT pin are connect with One Time Programmable device and mid-point voltage respectively by high-pressure MOS, the midpoint electricity
Pressure is connect with VD foot, and the REXT pin is connect with constant current and logic controller.
Wherein, ZX1005B is the linear invariable power IC of a single hop, exports current adjustment, and constant current accuracy is high, can input permanent function
Rate setting, chip system, structure is simple, and peripheral component is few, and application scheme is simple, and cost and resistance-capacitance depressurization are suitable, has
Overheat protector function, it is safer, it is more reliable.
The utility model additionally provides the work-based logic of the linear invariable power IC of ZX1005B single hop, as shown in the table:
| Pin | Pin serial number | Function |
| GND | 1 | Chip |
| REXT | 2 | Chip current adjustable side |
| OUT | 7 | Chip current output end |
| VD | 8 | End is arranged in Power auto-adjustment function |
| NC | 3、4、5、6 | The unsettled pin |
Electrical installation parameter (if without specified otherwise, environment temperature is 25 DEG C) is as shown in the table:
| Parameter | Condition | Minimum value | Representative value | Maximum value | Unit |
| OUT input voltage | Iout=30mA | 6.5 | - | - | V |
| OUT terminal mouth pressure resistance | Iout=0 | 500 | - | - | V |
| Export electric current | - | 5 | - | 60 | mA |
| Quiescent current | Vout=10V REXT is hanging | - | 0.16 | 0.25 | mA |
| REXT port voltage | Vout=10V | - | 0.6 | - | V |
| Iout error | Iout=5~60mA | ± 3% | % | ||
| Temperature compensation point Tsc | - | 140 | ℃ |
(1) in-line power
Upon power-up of the system, OUT foot is powered by internal high-pressure MOS to chip, after the voltage of OUT foot is more than 9V
Chip is started to work.
(2) current regulation
LED current can be accurately set by non-essential resistance, export electric current calculation formula:
Iout=Vrext/Rs1=600mV/Rs1 (Ma)
(3) input power constant compensation function
As input AC voltage increases, in order to reduce loss, keep input power relative constant, ZX1005B is according to OUT
The voltage levels of foot change LED string electric current, and the amplitude of change passes through RD1 resistance adjustment.
Formula is as follows:
VREXT=0.6-2.1K Ω/RD1*VD
(4) overheat protector function
ZX1005B has the function of overheat protector, output electric current is gradually reduced when driving IC overheat, to control output work
Rate and temperature rise, make product temperature be maintained at setting value, to improve the reliability of system.
(5) PCB design points for attention
The ground wire of current sampling resistor is as short as possible.The area on ground wants as big as possible, to reduce thermal resistance, enhances heat radiation energy
Power.
(6) heat dissipation design
Heat radiating metal is arranged at the bottom ZX1005B, and portion has been coupled to GND pin in the chip.In Design PCB, corresponding IC
Bottom need to increase pad and be connected to ground, and the copper sheet area of pad connection is as big as possible, to improve the heat-sinking capability of product.
Working principle or structural principle, when input voltage AC220V, the control of LED lamp bead series voltage is in 250- when design
(it can choose 1W/21V light source) between 280V；
Voltage AC220V is inputted by L/N line, and F1 is connected on firewire L, is powered directly to bridge heap.After BD1 is rectified,
Become direct current.It is filtered again by CX1, reduces the current ripples of input to interference caused by light source.Resistance R1 is bleeder resistance, is opened
Pass moment discharges to CX1.It after above-mentioned rectifying and wave-filtering, can be powered directly to light source, IC passes through interior therewith
MOS is set, is also started to work.
Capacitor C1 primarily serves antisurge buffer function, avoids IC instantaneous pressure breakdown, improves product reliability；
Resistance RS1 is used to adjust the constant current value of chip, and the power wanted according to design is (because Vled is that light source VF is determined
Fixed, so output electric current/Iled size determines watt level), can be from the size of adjusted resistance value, resistance value is bigger, output
Electric current is smaller, and power is lower.Otherwise resistance value is smaller, and output electric current is bigger, and power is higher.Using formula: Iout=Vrext/
Rs1=600mV/Rs1 (Ma) calculating (note: output electric current does not allow the maximum operating currenbt greater than LED lamp bead, in order to avoid influence LED
The service life of light source).
Resistance RD1 for inputting line voltage compensation setting, (and apply according to OUT terminal mouth output current characteristic by specific calculate
Formula: VREXT=0.6-2.1K Ω/RD1*VD).
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of invariable power linear constant current LED bulb, including overcurrent protective switch F1, AC/DC switch rectifying circuit, filtered circuit
It releases route, switching outlet line, Power auto-adjustment function route, output current control circuit and LED light source work inside IC
Make route, it is characterised in that: the AC/DC switching rectifying circuit includes rectifier bridge stack DB1, and the one of the overcurrent protective switch F1
End is connect with the end alternating current L, and the other end of the overcurrent protective switch F1 is connect with 3 feet of rectifier bridge stack DB1, the rectifier bridge stack
1 foot of DB1 is connect with alternating current N-terminal, and the AC/DC switching rectifying circuit is connected to switching outlet line connection inside IC, described
Switching outlet line and Power auto-adjustment function route, output current control circuit and LED light source working line connect inside IC
It connects, switching outlet line includes the linear invariable power IC of single hop inside the IC.
2. a kind of invariable power linear constant current LED bulb according to claim 1, it is characterised in that: the single hop is linearly permanent
Power IC includes GND pin, REXT pin, the hanging pin of four groups of NC, OUT pin and VD pin, and the filtered circuit is released line
Road includes safety capacitor CX1, and the LED light source working line includes LED1-12 lamp bead, switches outlet line also inside the IC
Including resistance R1, resistance RD1, resistance RS1, capacitor C1.
3. a kind of invariable power linear constant current LED bulb according to claim 2, it is characterised in that: the rectifier bridge stack DB1
2 feet simultaneously connect with one end of resistance R1, safety capacitor CX1 and LED1-12 lamp bead, the resistance R1 and safety capacitor CX1
It is parallel with one another；The REXT pin of the linear invariable power IC of single hop is connect with one end of resistance RS1, the OUT pin with it is described
One end of capacitor C1 connects, and the VD pin is connect by the RD1 with the other end of the LED1-12 lamp bead, the rectification
2 feet of bridge heap DB1, safety capacitor CX1, resistance R1, resistance RS1 and capacitor C1 the other end be grounded.
4. a kind of invariable power linear constant current LED bulb according to claim 1, it is characterised in that: the overcurrent protection is opened
Pass F1 is fuse/PTC thermistor.
5. a kind of invariable power linear constant current LED bulb according to claim 2, it is characterised in that: the single hop is linearly permanent
The model ZX1005B of Power IC.
6. a kind of invariable power linear constant current LED bulb according to claim 5, it is characterised in that: the ZX1005B driving
The inside of control chip is made of power supply, One Time Programmable device, mid-point voltage, constant current and logic controller and high-pressure MOS, institute
It states power supply to connect with the One Time Programmable device and mid-point voltage respectively, the One Time Programmable device and mid-point voltage and institute
State constant current and logic controller connection, the OUT pin connects to power supply, the OUT pin by high-pressure MOS respectively and once
Property Programmable connected with mid-point voltage, the mid-point voltage is connect with VD foot, the REXT pin and constant current and logic control
Device connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822103483.4U CN209710378U (en) | 2018-12-14 | 2018-12-14 | A kind of invariable power linear constant current LED bulb |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822103483.4U CN209710378U (en) | 2018-12-14 | 2018-12-14 | A kind of invariable power linear constant current LED bulb |
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| Publication Number | Publication Date |
|---|---|
| CN209710378U true CN209710378U (en) | 2019-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822103483.4U Expired - Fee Related CN209710378U (en) | 2018-12-14 | 2018-12-14 | A kind of invariable power linear constant current LED bulb |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227593A1 (en) * | 2020-05-15 | 2021-11-18 | 佛山市威得士灯饰电器有限公司 | Linear silicon-controlled dimming driving apparatus for led lamp |
-
2018
- 2018-12-14 CN CN201822103483.4U patent/CN209710378U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227593A1 (en) * | 2020-05-15 | 2021-11-18 | 佛山市威得士灯饰电器有限公司 | Linear silicon-controlled dimming driving apparatus for led lamp |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191129 Termination date: 20201214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |