CN106341927A - LED driving chip, LED driving circuit and LED photoelectric module - Google Patents
LED driving chip, LED driving circuit and LED photoelectric module Download PDFInfo
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- CN106341927A CN106341927A CN201610941966.4A CN201610941966A CN106341927A CN 106341927 A CN106341927 A CN 106341927A CN 201610941966 A CN201610941966 A CN 201610941966A CN 106341927 A CN106341927 A CN 106341927A
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- driving chip
- led driving
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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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]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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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]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
The invention discloses an LED driving chip, LED driving circuit and LED photoelectric module. The LED driving chip comprises a first driving unit. The first driving unit includes a first current regulating terminal, a first current output terminal and a first grounding terminal. The first driving unit further comprises a first over-voltage constant power detection terminal for detecting the current operating temperature and the operating voltage of the LED driving chip. The LED driving chip controls the first current regulating terminal and the first current output terminal based on the operating temperature and the operating voltage so that the LED driving chip can operate in an over-temperature protection mode, a constant current driving work mode or an over-voltage constant-power mode. According to the invention, the LED driving chip is not burned and damaged due to high operating temperature, and enables an LED illumination device to work for a longer time, therefore, facilitating the use of users.
Description
Technical field
The present invention relates to the actuation techniques field of led photoelectricity module, more particularly to a kind of led driving chip, led drive
Circuit and led photoelectricity module.
Background technology
Led photoelectricity module is because having environmental protection, long service life, energy-conservation, stable performance, light efficiency height and small volume etc.
Advantage, has been widely used at present to various lighting fields, such as room lighting, automobile, consumption electronic products.
There is the led driving chip of various driving led photoelectricity module work in the market, this kind of led driving chip is most
Single function, or being current constant control, or power limitation control, also has consideration overvoltage protection or overheat protector, but existing skill
These led driving chip of art are simultaneously unfavorable for driving led photoelectricity module normal work, have even having influence on user uses body
Test, bring the undesirable effect of user.A kind of led Constant-power drive chip is for example had on current market, it is in the normal work of 220v
As when be in an invariable power value, and work as voltage from 220v occur change, when 220v varies between 240v, remain in that
State invariable power value.For general led photoelectricity module, all can be used as the suitable electricity that works between voltage 220v to 240v
Pressure, if keeping above-mentioned invariable power value, the brightness of led photoelectricity module can occur with variation in voltage brightness decline hence it is evident that
Have influence on the use of led photoelectricity module.Additionally, existing led driving chip single function in terms of chip protection, for example merely
The led driving chip of setting overheat protector, due to not considering voltage well it is possible to the overvoltage of led driving chip will
Led driving chip has burnt out and has not also started overheat protector, and this virtually decreases the service life of led driving chip again, and one
Denier led driving chip is scrapped, then whole led photoelectricity module all may abandon, not only not waste of resource, is also added significantly to consume
Person's cost.
Therefore, it is necessary to propose a kind of new led driving chip solution, in order to solve the above problems.
Content of the invention
The present invention is based on above one or more problem, provides a kind of led driving chip, led drive circuit and led
Photoelectricity module, leads to led luminaire in order to solve directly to close when led driving chip in prior art is in overvoltage work
Continuous working period is short, to the awkward problem of user.
The present invention provides a kind of led driving chip, and described led driving chip includes the first driver element, described first drive
Moving cell includes: the first electric current adjustable side, the first current output terminal and the first earth terminal；Wherein, described first driver element is also
Including: the first over-pressed invariable power test side, for detecting described led driving chip current operating temperature and running voltage, described
Led driving chip, according to described operating temperature and described running voltage, controls described first electric current adjustable side and described first electricity
Stream outfan work makes described led driving chip be operated in overheat protector pattern, constant-current driving mode of operation and over-pressed invariable power
One of mode of operation, specifically, when the operating temperature of described led driving chip is detected more than the first preset temperature threshold value,
Open overheat protector mode of operation；When the operating temperature described led driving chip is detected is less than the first preset temperature threshold value, and
When running voltage is between first voltage value and second voltage value, described led driving chip enters constant-current driving mode of operation；When
The operating temperature described led driving chip is detected is less than the first preset temperature threshold value, and running voltage is more than or equal to the second electricity
Pressure value and during less than third voltage value, described led driving chip enters over-pressed invariable power mode of operation, wherein said first voltage
Value is less than described second voltage value, and described second voltage value is less than described third voltage value.
It is preferred that described led driving chip also includes the second driver element, described second driver element and described first drive
Moving cell is packaged in the housing of described led driving chip in the lump, and described second driver element includes: the second electric current adjustable side,
Second current output terminal and the second earth terminal；It is characterized in that, described second driver element also includes: the second over-pressed invariable power inspection
Survey end, for detecting described led driving chip current operating temperature and running voltage, described led driving chip is according to described work
Make temperature and described running voltage, control described second electric current adjustable side to make described led with described second current output terminal work
Driving chip is operated in one of overheat protector pattern, constant-current driving mode of operation and over-pressed invariable power mode of operation, specifically, when
When the operating temperature described led driving chip is detected is more than the second preset temperature threshold value, open overheat protector mode of operation；When
Detect described led driving chip operating temperature be less than the second preset temperature threshold value, and running voltage the 4th magnitude of voltage with
When between the 5th magnitude of voltage, described led driving chip enters constant-current driving mode of operation；When described led driving chip is detected
Operating temperature be less than the second preset temperature threshold value, and running voltage be more than or equal to the 5th magnitude of voltage and be less than the 6th magnitude of voltage
When, described led driving chip enters over-pressed invariable power mode of operation, and the wherein the 4th magnitude of voltage is less than the 5th magnitude of voltage, and described the
Five magnitudes of voltage are less than described 6th magnitude of voltage.
It is preferred that the described first electric current adjustable side of described first driver element is relative with described first current output terminal setting
Put, described first earth terminal is oppositely arranged with the described first over-pressed invariable power test side.
It is preferred that the described first electric current adjustable side of described first driver element is relative with described first current output terminal setting
Put, described first earth terminal is oppositely arranged with the described first over-pressed invariable power test side, described the of described second driver element
Two electric current adjustable sides are oppositely arranged with described second current output terminal, and described second earth terminal is examined with the described second over-pressed invariable power
Survey end to be oppositely arranged, and described first earth terminal, described first electric current adjustable side, described second earth terminal and described second electric current
Adjustable side is sequentially arranged in the first side of described led driving chip housing, the described first over-pressed invariable power test side, described first electricity
Stream outfan, the described second over-pressed invariable power test side and described second current output terminal are sequentially arranged in described led driving chip
Second side of housing, the first side of described led driving chip is relative with described second side.
It is preferred that described first driver element of described led driving chip and/or described second driver element include an excess temperature
Protection hysteresis circuitry, for when temperature change reaches a preset value, starting overheat protector.
It is preferred that described led driving chip also includes high pressure drop electric current starting point testing circuit, for detecting the first electric current
Outfan and/or the voltage of the second current output terminal, when the voltage of the first current output terminal and/or the second current output terminal exceedes
During one fall stream voltage preset value, described led driving chip is gradually reduced electric current, until voltage returns to described fall stream voltage and presets
In the range of value.
It is preferred that described led driving chip includes excess temperature adjusts circuit with corresponding described overheat protector pattern, described excess temperature
Adjust circuit according to the first current output terminal described in the temperature adjustment of described led driving chip and/or described second electric current output
The electric current output at end, when the temperature of described led driving chip exceedes first threshold, exports after current value is reduced 1/4, works as institute
When stating the temperature of led driving chip and exceeding Second Threshold, close described first current output terminal and/or described second electric current output
The electric current output at end.
The present invention provides a kind of led drive circuit, and wherein, described led drive circuit is included as described in above any one
Led driving chip.
The present invention also provides a kind of led photoelectricity module it is characterised in that described led photoelectricity module includes a led drives electricity
Road, described led drive circuit is foregoing led drive circuit.
It is preferred that described led photoelectricity module be applied to led bulb lamp, led daylight lamp, led Down lamp, led lamp affixed to the ceiling or
In led bulkhead lamp.
Led driving chip, led drive circuit and led photoelectricity module that the present invention provides, are provided by the first overvoltage
Invariable power test side, adjusts the working condition of the led driving chip being in pressure, in the case of ensureing led normal work,
Extend the working time of led driving chip, increased the convenience of user's use.
Brief description
Fig. 1 is the structural representation of present pre-ferred embodiments led driving chip.
Fig. 2 is the structural representation of a preferred embodiment of the led drive circuit with the led driving chip described in Fig. 1.
Fig. 3 is the structural representation of another preferred embodiment of the led drive circuit with the led driving chip described in Fig. 1
Figure.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.If it should be noted that not conflicting, this
Each feature in bright embodiment and embodiment can be combined with each other, all within protection scope of the present invention.
Refer to Fig. 1, Fig. 1 is the structural representation of present pre-ferred embodiments led driving chip.As shown in figure 1, this
Bright provided led driving chip 10 is mainly used in driving LED lamp work.Described led driving chip 10 includes one first driving
Unit.Described first driver element includes: the first electric current adjustable side rext1, the first current output terminal out1 and the first earth terminal
gnd1；Wherein, described first driver element also includes: the first over-pressed invariable power test side ovp1, for detecting described led driving
Chip 10 current operating temperature and running voltage, described led driving chip 10 according to described operating temperature and described running voltage,
Described first electric current adjustable side rext1 is controlled to make described led driving chip work with described first current output terminal out1 work
In one of overheat protector pattern, constant-current driving mode of operation and over-pressed invariable power mode of operation.Specifically, described when detecting
When the operating temperature of led driving chip 10 is more than the first preset temperature threshold value (such as 140 DEG C), open overheat protector Working mould
Formula；When detect described led driving chip operating temperature be less than the first preset temperature threshold value, such as operating temperature at 130 DEG C,
And running voltage between first voltage value and second voltage value when, described led driving chip 10 enters constant-current driving Working mould
Formula；When the operating temperature described led driving chip is detected is less than the first preset temperature threshold value, and running voltage is more than or equal to the
Two magnitudes of voltage and during less than third voltage value, described led driving chip enters over-pressed invariable power mode of operation, and wherein said first
Magnitude of voltage is less than described second voltage value, and described second voltage value is less than described third voltage value.It should be noted that here
After overheat protector pattern refers to that the temperature of led driving chip exceeds the first preset temperature threshold value, now led driving chip mistake is described
Heat, needs to be gradually reduced output current, thus controlling output and temperature to raise, so that led driving chip is maintained at constant
Value, to improve the reliability of system.Also have Yi Dan detect temperature overheating after, reduce electric current export number can be according to need
To arrange, generally, on the premise of not affecting the work of led driving chip, the range regulation of output current is to former defeated
Go out between the 1/4 to 3/4 of electric current.Led driving chip can constantly detect own temperature, when the temperature of led driving chip drops to
Below first preset temperature threshold value when (as less than 140 DEG C), output current recovers normal.Additionally, the temperature when led driving chip
When excessive more than the first preset temperature threshold value, when such as reaching the second preset temperature threshold value (such as 160 DEG C), if now led drives
Chip works on, and then led driving chip has the risk burning out to make temperature continue rising, and led driving chip should turn off described
The electric current output of the first current output terminal out1, to protect led driving chip to avoid being burned, when led driving chip is through reaching a standard
After closing radiating and cooling, the 3rd default temperature that temperature is located between the first preset temperature threshold value and the second preset temperature threshold value is detected
During degree threshold value (such as 145 DEG C), now restart the first current output terminal out1 output current of led driving chip 10, and
Gradually recover normal work.
And constant-current driving mode of operation refers to the temperature of led driving chip 10 not less than the first preset temperature threshold value (140
DEG C) when, when the running voltage of led driving chip is between first voltage value (as 180v) and second voltage value (as 240v),
Now adopt LED lamp work described in described led driving chip output constant current driven.Here illustrate described 180v and 240v
When being the city's alternating current adopting 220v with led driving chip place circuit, run into the shadow that the input voltage fluctuation in circuit brings
Ring, led driving chip is worked with constant-current driving pattern.
Further, over-pressed invariable power mode of operation refers to the temperature of led driving chip 10 not less than the first preset temperature threshold value
(140 DEG C), and the running voltage of led driving chip second voltage value (such as 240v) and third voltage value (such as 300v) it
Between when, led driving chip is detected and be in overvoltage condition, be now gradually reduced output current and ensure that output is in steady state value
Or approximately constant value, to improve the stability of system.In the overvoltage of led driving chip, progressively reduce output current, output electricity
The 1/3 of the original electric current of stream.The pin voltage of the first current output terminal out1 can constantly be detected, when the pin of out1 simultaneously
Voltage and the first earth terminal gnd1 pressure reduction be down to a certain magnitude of voltage (such as 70v) below when, then recover normal electric current output.?
In prior art, can quit work once detecting when led driving chip is in overvoltage, LED lamp is also accordingly turned off.Compared to existing
For having technology, the led driving chip of the present invention is not off work in overvoltage, but by adjust electric current output it is ensured that
LED lamp works under over-pressed constant power mode, does not interfere with the job stability of whole led drive circuit, and LED lamp is also normal
Luminous, thus user will not be brought with impact, greatly improve Consumer's Experience.
Specifically, a specific embodiment with regard to constant-current driving, over-pressed invariable power is to work as to detect at led driving chip
In rational voltage range when (such as 220v to 240v), power adjustable section, so that LED lamp is in constant luminance, that is,
Constant-current driving；But when voltage exceedes above-mentioned voltage range (more than 240v), such as voltage is in the scope of 240v to 300v
Adjust the electric current output of led driving chip when interior it is ensured that in operated at constant power again, and now the brightness of LED lamp can be suitably
Reduce, in order to avoid led driving chip is burned, here it is over-pressed invariable power.
The led driving chip of the present invention is provided by the first over-pressed invariable power test side, adjusts the led being in pressure
The working condition of driving chip, in the case of ensureing led normal work, extends the working time of led driving chip, increases
The convenience that user uses.
In a preferred embodiment, described led driving chip also includes the second driver element.Described second driver element
In the housing that described first driver element is packaged in described led driving chip in the lump, described second driver element and described the
The structure of one driver element is identical, specifically includes that the second electric current adjustable side, the second current output terminal and the second earth terminal.Described
Second driver element also includes: the second over-pressed invariable power test side, for detect described led driving chip current operating temperature with
Running voltage, described led driving chip, according to described operating temperature and described running voltage, controls described second electric current adjustable side
Described led driving chip is made to be operated in overheat protector pattern, constant-current driving mode of operation with described second current output terminal work
One of and overvoltage invariable power mode of operation, specifically, when the operating temperature described led driving chip is detected is default more than second
During temperature threshold, open overheat protector mode of operation；Preset when the operating temperature described led driving chip is detected is less than second
Temperature threshold, and running voltage between the 4th magnitude of voltage and the 5th magnitude of voltage when, described led driving chip enters constant-current driving
Mode of operation；When the operating temperature described led driving chip is detected is less than the second preset temperature threshold value, and running voltage is more than
During equal to the 5th magnitude of voltage and less than six magnitudes of voltage, described led driving chip enters over-pressed invariable power mode of operation, and wherein the
Four magnitudes of voltage are less than the 5th magnitude of voltage, and described 5th magnitude of voltage is less than described 6th magnitude of voltage.Due to the second driver element and
One structure of driving unit is identical, and the description about the second driver element each several part refers to retouching in detail of above the first driver element
State, will not be described here.
Further, the described first electric current adjustable side rext1 of described first driver element and described first electric current output
End out1 is oppositely arranged, and described first earth terminal gnd1 invariable power test side ovp1 over-pressed with described first is oppositely arranged.
Further, except described first electric current adjustable side rext1 and described first electricity of described first driver element
Stream outfan out1 is oppositely arranged, and described first earth terminal gnd1 invariable power test side ovp1 over-pressed with described first is oppositely arranged
Outward, the described second electric current adjustable side rext2 and described second current output terminal out2 of described second driver element is oppositely arranged,
Described second earth terminal gnd2 invariable power test side ovp2 over-pressed with described second is oppositely arranged, and described first earth terminal
Gnd1, described first electric current adjustable side rext1, described second earth terminal gnd2 and described second electric current adjustable side rext2 are successively
Located at the first side of described led driving chip housing, the described first over-pressed invariable power test side ovp1, described first electric current output
End out1, the described second over-pressed invariable power test side ovp2 and described second current output terminal out2 are sequentially arranged in described led and drive
Second side of dynamic chip housing, the first side of described led driving chip is relative with described second side.
In a variant embodiment, described first driver element of described led driving chip and/or described second drives
Unit includes an overheat protector hysteresis circuitry, for when temperature change reaches a preset value, starting overheat protector.For example work as led
After driving chip temperature is in 140 DEG C, when temperature change reaches 20 DEG C, now due to due to temperature sensor thermometric sluggishness,
Although the temperature measuring led driving chip is not 160 DEG C, also should start overheat protector, in order to avoid led driving chip is too high because of temperature
And burn out.
In another variant embodiment, described led driving chip also includes high pressure drop electric current starting point testing circuit, uses
In the voltage detecting the first current output terminal and/or the second current output terminal, when the first current output terminal and the first earth terminal
When the voltage difference of voltage difference and/or the second current output terminal and the second earth terminal is more than fall stream voltage preset value (as a 70v), institute
State led driving chip and be gradually reduced electric current, until voltage returns in described fall stream voltage values, output current is recovered
Normally.Defeated with the voltage difference of the first earth terminal and/or the second electric current by measuring the first current output terminal of the first driver element
The mode going out end with the voltage difference of the second earth terminal can further ensure that led driving chip is in suitable running voltage
In the range of, effectively prevent voltage detecting inaccurate, lead to the problem that chip burns.
In a specific embodiment, described led driving chip 10 includes excess temperature regulation circuit with correspondence described excess temperature guarantor
Shield pattern, described excess temperature adjusts circuit according to the first current output terminal and/or institute described in the temperature adjustment of described led driving chip
State the electric current output of the second current output terminal, when the temperature of described led driving chip 10 exceedes first threshold (such as 140 DEG C)
When, export after current value is reduced 1/4；When the temperature of described led driving chip 10 exceedes Second Threshold (such as 160 DEG C),
Close the electric current output of described first current output terminal out1 and/or described second current output terminal out2.
Furthermore, it is necessary to explanation, in above-mentioned led driving chip, the first current output terminal out1 and/or the second electric current are defeated
The port voltage scope going out to hold out2 is between -0.5v to 450v, and the scope of electric current is between 5ma to 60ma, operating temperature
, between -40 DEG C to 150 DEG C, between -65 DEG C to 150 DEG C, scope that Electro-static Driven Comb (esd) is pressure is in 2kv for storage temperature for scope
Within.Further, the temperature compensation point temperature of above-mentioned led driving chip is 140 DEG C, and it is 70v that high pressure drop electric current initiates point voltage, high
When it is between 70v to 150v that high pressure drop electric current initiates point voltage, scope is 0.6/v to 0.9/v to pressure drop current coefficient d, preferably
Representative value be 0.8/v.
Led driving chip startup work is in the pin voltage of the first current output terminal out1 and corresponding first earth terminal
When pressure reduction between gnd1 is more than cut-in voltage, led driving chip is started working, and realizes current constant control.With temperature raise or
Person is raised by voltage to be affected, and led driving chip is opened overheat protector pattern or entered over-pressed constant power mode to protect
Led driving chip normal work.
It is 110v or 220v mains input voltage that the led driving chip of the present invention is suitable for alternating voltage, output current
Adjustable extent is big (between 5ma to 60ma), and constant current accuracy can reach ± 3%；There is overheat protector, overvoltage protection and overvoltage
Invariable power function.Can be with compatible silicon controlled dimmer, overall architecture is simple, no battery interference (emi) problem, meets safety mark
Accurate.
Refer to Fig. 2, Fig. 2 is a preferred embodiment of the led drive circuit with the led driving chip described in Fig. 1
Structural representation.As shown in Fig. 2 the led drive circuit of the present invention includes foregoing led driving chip.Additionally, this led
The operation principle of drive circuit is summarized as follows:
External AC power supply flows into led drive circuit through power access end l, n end, and l end flows into rectification unit db1, rectification afterwards
Unit db1 adopts the rectifier bridge of 4 common diodes, exports led unit, meanwhile, with rectification list after rectified unit db1
First db1 parallel connection is provided with variable resistance rv1, acts primarily as antisurge cushioning effect, it is to avoid led driving chip 10 was punctured by moment, carried
The high reliability of led driver element.Led unit includes many LED lamps, illustrates the led1 ... connecting in the present embodiment
Ledn, naturally it is also possible to parallel connection, can also be the series-parallel connection connected with combination in parallel, and these are all common simple connection conversion,
All within the scope of the present invention.It is provided with electrolysis between one end that the same n end of rectification unit db1 connects and earth terminal simultaneously
Electric capacity c2, for power filter, improving the meansigma methodss of supply voltage, thus improving power-efficient.By adjusting electrochemical capacitor
C2 is so that power factor (pf) value of whole led drive circuit is more than 0.5.Varistor rv1 in led drive circuit,
Electric capacity c1 mainly plays antisurge cushioning effect, it is to avoid led driving chip is breakdown, improves product reliability.Resistance r3 and electricity
Resistance r4 series connection, plays discharge process, and resistance r1 and resistance r2 is used to adjust the constant current value size of LED lamp.And led drives core
First electric current adjustable side rext1, the first earth terminal gnd1 of piece connect earth terminal gnd0, the second electric current adjustable side after resistance r1
Rext2 connects earth terminal gnd0 after resistance r2, and the second earth terminal gnd2 end gnd0 connected directly to the grounded.Led unit
First end is connected with rectification unit, and the second end one tunnel of led unit is directly connected to ovp1, out1, ovp2 of led driving chip
And out2, another road is grounded after electric capacity c1 and resistance r1.
Refer to Fig. 3, Fig. 3 is another preferred embodiment of the led drive circuit with the led driving chip described in Fig. 1
Structural representation.As shown in figure 3, the led drive circuit of the present invention is entered on the basis of the led drive circuit of Fig. 2
One step is improved.In Fig. 3 the LED lamp string of led unit using parallel connection by the way of, by two led driving chip 10 and 20 with parallel
Mode drive control led unit, this two led driving chip 10 are identical with 20 structures, drive a led unit and the respectively
Two led units, a led unit includes led1 ... the ledn connecting, and the 2nd led unit includes ledn+1 ... the ledm connecting.
The present invention also provides a kind of led photoelectricity module, and including a led drive circuit, described led drive circuit is as front institute
The led drive circuit stated.It is preferred that described led photoelectricity module is applied to led bulb lamp, led daylight lamp, led Down lamp, led
In lamp affixed to the ceiling or led bulkhead lamp.
The foregoing is only embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilization is originally
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (10)
1. a kind of led driving chip, described led driving chip includes the first driver element, and described first driver element includes:
First electric current adjustable side, the first current output terminal and the first earth terminal；It is characterized in that, described first driver element also includes:
First over-pressed invariable power test side, for detecting described led driving chip current operating temperature and running voltage, described
Led driving chip, according to described operating temperature and described running voltage, controls described first electric current adjustable side and described first electricity
Stream outfan work makes described led driving chip be operated in overheat protector pattern, constant-current driving mode of operation and over-pressed invariable power
One of mode of operation, specifically,
When the operating temperature of described led driving chip is detected more than the first preset temperature threshold value, open overheat protector work
Pattern；
When the operating temperature described led driving chip is detected is less than the first preset temperature threshold value, and running voltage is in the first electricity
When between pressure value and second voltage value, described led driving chip enters constant-current driving mode of operation；
When the operating temperature described led driving chip is detected is less than the first preset temperature threshold value, and running voltage is more than or equal to
Second voltage value and during less than third voltage value, described led driving chip enters over-pressed invariable power mode of operation, and wherein said the
One magnitude of voltage is less than described second voltage value, and described second voltage value is less than described third voltage value.
2. led driving chip as claimed in claim 1 is it is characterised in that described led driving chip also includes the second driving list
Unit, described second driver element and described first driver element are packaged in the housing of described led driving chip in the lump, and described the
Two driver elements include: the second electric current adjustable side, the second current output terminal and the second earth terminal；It is characterized in that, described second
Driver element also includes:
Second over-pressed invariable power test side, for detecting described led driving chip current operating temperature and running voltage, described
Led driving chip, according to described operating temperature and described running voltage, controls described second electric current adjustable side and described second electricity
Stream outfan work makes described led driving chip be operated in overheat protector pattern, constant-current driving mode of operation and over-pressed invariable power
One of mode of operation, specifically,
When the operating temperature of described led driving chip is detected more than the second preset temperature threshold value, open overheat protector work
Pattern；
When the operating temperature described led driving chip is detected is less than the second preset temperature threshold value, and running voltage is in the 4th electricity
When between pressure value and the 5th magnitude of voltage, described led driving chip enters constant-current driving mode of operation；
When the operating temperature described led driving chip is detected is less than the second preset temperature threshold value, and running voltage is more than or equal to
5th magnitude of voltage and during less than six magnitudes of voltage, described led driving chip enters over-pressed invariable power mode of operation, the wherein the 4th electricity
Pressure value is less than the 5th magnitude of voltage, and described 5th magnitude of voltage is less than described 6th magnitude of voltage.
3. led driving chip as claimed in claim 1 is it is characterised in that described first electric current of described first driver element
Adjustable side is oppositely arranged with described first current output terminal, described first earth terminal and the described first over-pressed invariable power test side phase
To setting.
4. led driving chip as claimed in claim 2 is it is characterised in that described first electric current of described first driver element
Adjustable side is oppositely arranged with described first current output terminal, described first earth terminal and the described first over-pressed invariable power test side phase
To setting, described second electric current adjustable side and described second current output terminal of described second driver element are oppositely arranged, described
Second earth terminal is oppositely arranged with the described second over-pressed invariable power test side, and described first earth terminal, described first electric current are adjusted
Section end, described second earth terminal and described second electric current adjustable side are sequentially arranged in the first side of described led driving chip housing, institute
State the first over-pressed invariable power test side, described first current output terminal, the described second over-pressed invariable power test side and described second
Current output terminal is sequentially arranged in the second side of described led driving chip housing, the first side of described led driving chip and described the
Two sides are relatively.
5. the led driving chip as described in any one of claim 2 to 4 is it is characterised in that as described in described led driving chip
First driver element and/or described second driver element include an overheat protector hysteresis circuitry, pre- for reaching one in temperature change
If during value, start overheat protector.
6. led driving chip as claimed in claim 5 is it is characterised in that described led driving chip also includes high pressure drop electric current
Starting point testing circuit, for detecting the voltage of the first current output terminal and/or the second current output terminal, when the first electric current exports
When the voltage of end and/or the second current output terminal is more than a fall stream voltage preset value, described led driving chip is gradually reduced electricity
Stream, until voltage returns in described fall stream voltage values.
7. led driving chip as claimed in claim 5 adjusts circuit it is characterised in that described led driving chip includes excess temperature
With corresponding described overheat protector pattern, described excess temperature adjusts circuit according to first described in the temperature adjustment of described led driving chip
The electric current output of current output terminal and/or described second current output terminal, when the temperature of described led driving chip is more than the first threshold
During value, export after current value is reduced 1/4, when the temperature of described led driving chip exceedes Second Threshold, close described first
The electric current output of current output terminal and/or described second current output terminal.
8. a kind of led drive circuit is it is characterised in that described led drive circuit is included as described in any one of claim 1 to 7
Led driving chip.
9. it is characterised in that described led photoelectricity module includes a led drive circuit, described led drives a kind of led photoelectricity module
Circuit is the led drive circuit described in claim 8.
10. led photoelectricity module as claimed in claim 9 is it is characterised in that described led photoelectricity module is applied to led ball bubble
In lamp, led daylight lamp, led Down lamp, led lamp affixed to the ceiling or led bulkhead lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610941966.4A CN106341927B (en) | 2016-10-25 | 2016-10-25 | LED drive chip, LED drive circuit and LED photovoltaic module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610941966.4A CN106341927B (en) | 2016-10-25 | 2016-10-25 | LED drive chip, LED drive circuit and LED photovoltaic module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106341927A true CN106341927A (en) | 2017-01-18 |
| CN106341927B CN106341927B (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610941966.4A Active CN106341927B (en) | 2016-10-25 | 2016-10-25 | LED drive chip, LED drive circuit and LED photovoltaic module |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142930A (en) * | 2018-09-02 | 2019-01-04 | 华域视觉科技(上海)有限公司 | Headlamp LED drive module design and verification method |
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| CN204482097U (en) * | 2015-03-26 | 2015-07-15 | 李哲 | A kind of high-power LED drive circuit |
| CN205510468U (en) * | 2016-02-24 | 2016-08-24 | 深圳市益顺电子科技有限公司 | Constant current high pressure LED driver chip circuit |
| US20160249428A1 (en) * | 2015-02-20 | 2016-08-25 | Hubbell Incorporated | Light emitting diode thermal foldback control device and method |
| CN206136399U (en) * | 2016-10-25 | 2017-04-26 | 深圳市集智微电子科技有限公司 | LED driver chip , LED drive circuit and LED photovoltaic module |
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| US20160249428A1 (en) * | 2015-02-20 | 2016-08-25 | Hubbell Incorporated | Light emitting diode thermal foldback control device and method |
| CN204482097U (en) * | 2015-03-26 | 2015-07-15 | 李哲 | A kind of high-power LED drive circuit |
| CN205510468U (en) * | 2016-02-24 | 2016-08-24 | 深圳市益顺电子科技有限公司 | Constant current high pressure LED driver chip circuit |
| CN206136399U (en) * | 2016-10-25 | 2017-04-26 | 深圳市集智微电子科技有限公司 | LED driver chip , LED drive circuit and LED photovoltaic module |
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| CN109142930A (en) * | 2018-09-02 | 2019-01-04 | 华域视觉科技(上海)有限公司 | Headlamp LED drive module design and verification method |
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| Publication number | Publication date |
|---|---|
| CN106341927B (en) | 2017-12-29 |
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