CN106341927B - LED drive chip, LED drive circuit and LED photovoltaic module - Google Patents
LED drive chip, LED drive circuit and LED photovoltaic module Download PDFInfo
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- CN106341927B CN106341927B CN201610941966.4A CN201610941966A CN106341927B CN 106341927 B CN106341927 B CN 106341927B CN 201610941966 A CN201610941966 A CN 201610941966A CN 106341927 B CN106341927 B CN 106341927B
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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]
Abstract
The present invention discloses a kind of LED drive chip, LED drive circuit and LED photovoltaic module.LED drive chip includes the first driver element.First driver element includes：First current regulation end, the first current output terminal and the first earth terminal.First driver element also includes：First over-pressed invariable power test side; for detecting the LED drive chip current operating temperature and operating voltage; the LED drive chip controls the first current regulation end and first current output terminal work LED drive chip is operated in overheat protector pattern, constant current driving one of mode of operation and over-pressed invariable power mode of operation according to the operating temperature and the operating voltage.The LED drive chip of the present invention, which has, effectively prevents LED drive chip from, because operating temperature is too high, causing LED drive chip to burn out, while extends LED illumination device continuous working period as far as possible, the beneficial effect being user-friendly.
Description
Technical field
The present invention relates to the actuation techniques field of LED photovoltaic module, is driven more particularly to a kind of LED drive chip, LED
Circuit and LED photovoltaic module.
Background technology
LED photovoltaic module because with it is green, service life is long, energy-conservation, stable performance, light efficiency height and small volume etc.
Advantage, have been widely used at present to various lighting fields, such as room lighting, automobile, consumption electronic products.
There are the LED drive chip of various driving LED photovoltaic module work, this kind of LED drive chip majority in the market
Function is single, otherwise it is current constant control, otherwise power limitation control, also has and considers overvoltage protection or overheat protector, but existing skill
These LED drive chips of art are unfavorable for driving LED photovoltaic module normal work, and some even has influence on user and uses body
Test, bring the undesirable effect of user.Such as having a kind of LED Constant-power drives chip on current market, it is in the normal works of 220V
An invariable power value is in when making, and when voltage changes from 220V, varies to from 220V between 240V, remain in that
State invariable power value.For in general LED photovoltaic module, voltage 220V is to can be used as suitable work electricity between 240V
Pressure, if keeping above-mentioned invariable power value, brightness decline can occur with variation in voltage in the brightness of LED photovoltaic module, hence it is evident that
Have influence on the use of LED photovoltaic module.In addition, existing LED drive chip function in terms of chip protection is single, such as merely
The LED drive chip of overheat protector is set, due to not considering voltage well, it is possible to which LED drive chip overvoltage will
LED drive chip has been burnt out also without starting overheat protector, and this virtually reduces the service life of LED drive chip again, and one
Denier LED drive chip is scrapped, then whole LED photovoltaic module may all abandon, and not only not waste of resource, is also added significantly to consume
Person's cost.
Therefore, it is necessary to a kind of new LED drive chip solution is proposed, to solve the above problems.
The content of the invention
The present invention is based on above one or more problem, there is provided a kind of LED drive chip, LED drive circuit and LED
Photoelectricity module, cause LED illumination device to solve directly to close when LED drive chip in the prior art is in overvoltage work
Continuous working period is short, to user it is inconvenient for use the problem of.
The present invention provides a kind of LED drive chip, and the LED drive chip includes the first driver element, and described first drives
Moving cell includes：First current regulation end, the first current output terminal and the first earth terminal；Wherein, first driver element is also
Including：First over-pressed invariable power test side, it is described for detecting the LED drive chip current operating temperature and operating voltage
LED drive chip controls the first current regulation end and the described first electricity according to the operating temperature and the operating voltage
Stream output end work makes the LED drive 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 detecting the operating temperature of the LED drive chip more than the first preset temperature threshold value,
Open overheat protector mode of operation；When the operating temperature for detecting the LED drive chip is less than the first preset temperature threshold value, and
When operating voltage is between first voltage value and second voltage value, the LED drive chip enters constant current driving mode of operation；When
Detect that the operating temperature of the LED drive chip is less than the first preset temperature threshold value, and operating voltage is more than or equal to the second electricity
Pressure value and when being less than third voltage value, the LED drive chip enters over-pressed invariable power mode of operation, wherein the first voltage
Value is less than the second voltage value, and the second voltage value is less than the third voltage value.
It is preferred that the LED drive chip also includes the second driver element, second driver element drives with described first
Moving cell is packaged in the housing of the LED drive chip in the lump, and second driver element includes：Second current regulation end,
Second current output terminal and the second earth terminal；Characterized in that, second driver element also includes：Second over-pressed invariable power inspection
End is surveyed, for detecting the LED drive chip current operating temperature and operating voltage, the LED drive chip is according to the work
Make temperature and the operating voltage, control the second current regulation end to make the LED with second current output terminal work
Driving chip is operated in overheat protector pattern, constant current driving one of mode of operation and over-pressed invariable power mode of operation, specifically, when
When detecting the operating temperature of the LED drive chip more than the second preset temperature threshold value, overheat protector mode of operation is opened；When
Detect that the operating temperature of the LED drive chip is less than the second preset temperature threshold value, and operating voltage the 4th magnitude of voltage with
When between the 5th magnitude of voltage, the LED drive chip enters constant current driving mode of operation；When detecting the LED drive chip
Operating temperature be less than the second preset temperature threshold value, and operating voltage is more than or equal to the 5th magnitude of voltage and is less than the 6th magnitude of voltage
When, the LED drive chip enters over-pressed invariable power mode of operation, wherein the 4th magnitude of voltage is less than the 5th magnitude of voltage, described
Five magnitudes of voltage are less than the 6th magnitude of voltage.
Set it is preferred that the first current regulation end of first driver element is relative with first current output terminal
Put, first earth terminal is oppositely arranged with the described first over-pressed invariable power test side.
Set it is preferred that the first current regulation end of first driver element is relative with first current output terminal
To put, first earth terminal is oppositely arranged with the described first over-pressed invariable power test side, and described the of second driver element
Two current regulation ends are oppositely arranged with second current output terminal, and second earth terminal is examined with the described second over-pressed invariable power
End is surveyed to be oppositely arranged, and first earth terminal, the first current regulation end, second earth terminal and second electric current
Adjustable side is sequentially arranged in the first side of the LED drive chip housing, the first over-pressed invariable power test side, first electricity
Stream output end, the second over-pressed invariable power test side and second current output terminal are sequentially arranged in the LED drive chip
Second side of housing, the first side of the LED drive chip are relative with second side.
It is preferred that first driver element and/or second driver element of the LED drive chip include an excess temperature
Hysteresis circuitry is protected, for when temperature change reaches a preset value, starting overheat protector.
It is preferred that the LED drive chip also includes high pressure drop electric current starting point detection circuit, for detecting the first electric current
The voltage of output end and/or the second current output terminal, when the voltage of the first current output terminal and/or the second current output terminal exceedes
During one drop stream voltage preset value, the LED drive chip is gradually reduced electric current, until voltage returns to the drop stream voltage and preset
In the range of value.
It is preferred that the LED drive chip includes excess temperature regulation circuit with the corresponding overheat protector pattern, the excess temperature
Circuit is adjusted to export according to the first current output terminal described in the temperature adjustment of the LED drive chip and/or second electric current
The electric current output at end, when the temperature of the LED drive chip exceedes first threshold, exports after current value is reduced into 1/4, works as institute
When stating the temperature of LED drive chip and exceeding Second Threshold, first current output terminal and/or second electric current output are closed
The electric current output at end.
The present invention provides a kind of LED drive circuit, wherein, the LED drive circuit is included as described in above any one
LED drive chip.
The present invention also provides a kind of LED photovoltaic module, it is characterised in that the LED photovoltaic module includes LED driving electricity
Road, the LED drive circuit are foregoing LED drive circuit.
It is preferred that the LED photovoltaic module be applied to LED bulb lamps, LED daylight lamp, LED down lamp, LED ceiling lamp or
In LED bay light.
LED drive chip, LED drive circuit and LED photovoltaic module provided by the invention, by being provided with the first overvoltage
Invariable power test side, the working condition of LED drive chip of the regulation under overvoltage, in the case where ensureing LED normal works,
The working time of LED drive chip is extended, adds the convenience that user uses.
Brief description of the drawings
Fig. 1 is the structural representation of present pre-ferred embodiments LED drive chip.
Fig. 2 is the structural representation of a preferred embodiment of the LED drive circuit with the LED drive chip described in Fig. 1.
Fig. 3 is the structural representation of another preferred embodiment of the LED drive circuit with the LED drive chip described in Fig. 1
Figure.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.If it should be noted that do not conflicted, this hair
Each feature in bright embodiment and embodiment can be combined with each other, within protection scope of the present invention.
Fig. 1 is referred to, Fig. 1 is the structural representation of present pre-ferred embodiments LED drive chip.As shown in figure 1, this hair
Bright provided LED drive chip 10 is mainly used in driving LED work.The LED drive chip 10 includes one first driving
Unit.First driver element includes：First current regulation end REXT1, the first current output terminal OUT1 and the first earth terminal
GND1；Wherein, first driver element also includes：First over-pressed invariable power test side OVP1, for detecting the LED drivings
The current operating temperature of chip 10 and operating voltage, the LED drive chip 10 according to the operating temperature and the operating voltage,
Controlling the first current regulation end REXT1 and the first current output terminal OUT1 to work makes the LED drive chip work
In overheat protector pattern, constant current driving one of mode of operation and over-pressed invariable power mode of operation.Specifically, it is described when detecting
The operating temperature of LED drive chip 10 is more than the first preset temperature threshold value（Such as 140 DEG C）When, open overheat protector Working mould
Formula；When the operating temperature for detecting the LED drive chip is less than the first preset temperature threshold value, such as operating temperature at 130 DEG C,
And operating voltage between first voltage value and second voltage value when, the LED drive chip 10 enters constant current driving Working mould
Formula；When the operating temperature for detecting the LED drive chip is less than the first preset temperature threshold value, and operating voltage is more than or equal to the
Two magnitudes of voltage and when being less than third voltage value, the LED drive chip enters over-pressed invariable power mode of operation, wherein described first
Magnitude of voltage is less than the second voltage value, and the second voltage value is less than the third voltage value.It should be noted that here
After overheat protector pattern refers to that the temperature of LED drive chip exceeds the first preset temperature threshold value, illustrate now LED drive chip mistake
Heat so as to control power output and temperature to raise, enables LED drive chip to be maintained at constant, it is necessary to be gradually reduced output current
Value, to improve the reliability of system.Also after temperature overheating is detected, reduce electric current output number can be according to need
To set, generally, on the premise of LED drive chip work is not influenceed, the range regulation of output current is defeated to original
Go out between the 1/4 to 3/4 of electric current.LED drive chip can constantly detect own temperature, when the temperature of LED drive chip drops to
Below first preset temperature threshold value（Such as it is less than 140 DEG C）When, output current recovers normal.In addition, when the temperature of LED drive chip
When excessive more than the first preset temperature threshold value, such as reach the second preset temperature threshold value（Such as 160 DEG C）When, if now LED drives
Chip works on, and makes temperature continue to rise then LED drive chip to have a risk burnt out, and LED drive chip should turn off described
First current output terminal OUT1 electric current output, to protect LED drive chip from being burned, when LED drive chip is through reaching a standard
After closing radiating and cooling, threeth default temperature of the temperature between the first preset temperature threshold value and the second preset temperature threshold value is detected
Spend threshold value（Such as 145 DEG C）When, now restart LED drive chip 10 the first current output terminal OUT1 output currents, and
Gradually recover normal work.
And constant current driving mode of operation refers to the temperature of LED drive chip 10 not less than the first preset temperature threshold value（140
℃）When, the operating voltage of LED drive chip is in first voltage value（Such as 180V）With second voltage value（Such as 240V）Between when,
Now using LED work described in LED drive chip output constant current driven.Here illustrate described 180V and 240V
It is when using 220V city's alternating current with circuit where LED drive chip, to run into the shadow that the input voltage fluctuation in circuit is brought
Ring, LED drive chip is worked with constant current drive pattern.
Further, over-pressed invariable power mode of operation refers to the temperature of LED drive chip 10 not less than the first preset temperature threshold value
（140℃）, and the operating voltage of LED drive chip is in second voltage value（Such as 240V）With third voltage value（Such as 300V）It
Between when, detect that LED drive chip is in overvoltage condition, be now gradually reduced output current ensure power output be in steady state value
Or approximately constant value, to improve the stability of system.In LED drive chip overvoltage, progressively reduce output current, output electricity
The 1/3 of the most as little as original electric current of stream.The first current output terminal OUT1 pin voltage can be constantly detected simultaneously, when OUT1 pin
Voltage and the first earth terminal GND1 pressure differences are down to a certain magnitude of voltage（Such as 70V）When following, then recover normal electric current output.
In the prior art, can be stopped when detecting that LED drive chip is in over-pressed, LED is also accordingly turned off.Compared to existing
For having technology, LED drive chip of the invention is not off work in overvoltage, but is exported by adjusting electric current, ensures
LED works under over-pressed constant power mode, does not interfere with the job stability of whole LED drive circuit, and LED is also normal
It is luminous, thus influence will not be brought on user, greatly improve Consumer's Experience.
Specifically, a specific embodiment on constant current driving, over-pressed invariable power is to work as to detect at LED drive chip
In in rational voltage range（Such as 220V to 240V）When, power adjustable section, so that LED is in constant luminance, that is,
Constant current drives；But when voltage exceedes above-mentioned voltage range（More than 240V）When, such as voltage is in 240V to 300V scope
The electric current output of LED drive chip is adjusted when interior again, is ensured in operated at constant power, and the now brightness of LED can be appropriate
Reduce, in order to avoid LED drive chip is burned, here it is over-pressed invariable power.
The LED drive chip of the present invention is by being provided with the first over-pressed invariable power test side, LED of the regulation under overvoltage
The working condition of driving chip, in the case where ensureing LED normal works, the working time of LED drive chip is extended, increased
The convenience that user uses.
In a preferred embodiment, the LED drive chip also includes the second driver element.Second driver element
It is packaged in the lump in the housing of the LED drive chip with first driver element, second driver element and described the
The structure of one driver element is identical, mainly includes：Second current regulation end, the second current output terminal and the second earth terminal.It is described
Second driver element also includes：Second over-pressed invariable power test side, for detect the LED drive chip current operating temperature with
Operating voltage, the LED drive chip control the second current regulation end according to the operating temperature and the operating voltage
The LED drive chip is set to be operated in overheat protector pattern, constant current driving mode of operation with second current output terminal work
And one of over-pressed invariable power mode of operation, specifically, when the operating temperature for detecting the LED drive chip is default more than second
During temperature threshold, overheat protector mode of operation is opened；When the operating temperature for detecting the LED drive chip is default less than second
Temperature threshold, and when operating voltage is between the 4th magnitude of voltage and the 5th magnitude of voltage, the LED drive chip drives into constant current
Mode of operation；When the operating temperature for detecting the LED drive chip is less than the second preset temperature threshold value, and operating voltage is more than
When equal to the 5th magnitude of voltage and being less than six magnitudes of voltage, the LED drive chip enters over-pressed invariable power mode of operation, wherein the
Four magnitudes of voltage are less than the 5th magnitude of voltage, and the 5th magnitude of voltage is less than the 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 above the detailed of the first driver element and retouched
State, will not be repeated here.
Further, the first current regulation end REXT1 of first driver element exports with first electric current
End OUT1 is oppositely arranged, and the first earth terminal GND1 is oppositely arranged with the described first over-pressed invariable power test side OVP1.
Further, except the first current regulation end REXT1 and the described first electricity of first driver element
Stream output end OUT1 is oppositely arranged, and the first earth terminal GND1 is oppositely arranged with the described first over-pressed invariable power test side OVP1
Outside, the second current regulation end REXT2 of second driver element and the second current output terminal OUT2 is oppositely arranged,
The second earth terminal GND2 is oppositely arranged with the described second over-pressed invariable power test side OVP2, and first earth terminal
GND1, the first current regulation end REXT1, the second earth terminal GND2 and the second current regulation end REXT2 are successively
Located at the first side of the LED drive chip housing, the first over-pressed invariable power test side OVP1, first electric current output
End OUT1, the second over-pressed invariable power test side OVP2 and the second current output terminal OUT2 are sequentially arranged in the LED and driven
Second side of dynamic chip housing, the first side of the LED drive chip are relative with second side.
In a variant embodiment, first driver element of the LED drive chip and/or second driving
Unit includes an overheat protector hysteresis circuitry, for when temperature change reaches a preset value, starting overheat protector.Such as work as LED
After driving chip temperature is in 140 DEG C, when temperature change reaches 20 DEG C, now due to temperature sensor thermometric sluggishness,
Although the temperature for measuring LED drive chip is not 160 DEG C, it should also start overheat protector, in case LED drive chip is too high because of temperature
And burn out.
In another variant embodiment, the LED drive chip also includes high pressure drop electric current starting point detection circuit, uses
In the voltage for detecting the first current output terminal and/or the second current output terminal, when the first current output terminal and the first earth terminal
Voltage difference and/or the voltage difference of the second current output terminal and the second earth terminal are more than a drop stream voltage preset value（Such as 70V）When, institute
State LED drive chip and be gradually reduced electric current, until voltage is returned in the drop stream voltage values, output current is recovered
Normally.It is defeated by the first current output terminal and the voltage difference of the first earth terminal and/or the second electric current that measure the first driver element
Going out end and the mode of the voltage difference of the second earth terminal can further ensure that LED drive chip is in suitable operating voltage
In the range of, effectively prevent that voltage detecting is inaccurate, the problem of causing chip to burn.
In a specific embodiment, the LED drive chip 10 includes excess temperature regulation circuit with the corresponding excess temperature guarantor
Shield pattern, the excess temperature adjust circuit according to the first current output terminal described in the temperature adjustment of the LED drive chip and/or institute
The electric current output of the second current output terminal is stated, when the temperature of the LED drive chip 10 exceedes first threshold（Such as 140 DEG C）
When, exported after current value is reduced into 1/4；When the temperature of the LED drive chip 10 exceedes Second Threshold（Such as 160 DEG C）When,
Close the first current output terminal OUT1 and/or the second current output terminal OUT2 electric current output.
Furthermore, it is necessary to illustrate, in above-mentioned LED drive chip, the first current output terminal OUT1 and/or the second electric current are defeated
It is -0.5V between 450V to go out to hold OUT2 port voltage scope, and the scope of electric current is 5mA between 60mA, operating temperature
Scope is between -40 DEG C to 150 DEG C, and storage temperature is between -65 DEG C to 150 DEG C, Electro-static Driven Comb（ESD）Pressure-resistant scope is in 2KV
Within.Further, the temperature compensation point temperature of above-mentioned LED drive chip is 140 DEG C, and high pressure drop electric current starting point voltage is 70V, high
Pressure drop current coefficient d high pressure drop electric current starting point voltage be 70V between 150V when, scope is 0.6/V to 0.9/V, preferably
Representative value be 0.8/V.
It is pin voltage and corresponding first earth terminal in the first current output terminal OUT1 that LED drive chip, which starts work,
When pressure difference between GND1 is more than cut-in voltage, LED drive chip is started working, and realizes current constant control.With temperature rise or
Person by the elevated influence of voltage, open overheat protector pattern or enter over-pressed constant power mode to protect by LED drive chip
LED drive chip normal work.
The LED drive chip of the present invention is adapted to alternating voltage to be 110V or 220V mains input voltage, output current
Adjustable extent is big（5mA is between 60mA）, constant current accuracy can reach ± 3%；With overheat protector, overvoltage protection and overvoltage
Invariable power function.Can be with compatible silicon controlled light modulator, overall architecture is simple, no battery interference（EMI）Problem, meet safety mark
It is accurate.
Fig. 2 is referred to, Fig. 2 is a preferred embodiment of the LED drive circuit with the LED drive chip described in Fig. 1
Structural representation.As shown in Fig. 2 the LED drive circuit of the present invention includes foregoing LED drive chip.In addition, 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-terminal, and L ends flow into rectification unit DB1 afterwards,
Rectification unit DB1 uses the rectifier bridge of 4 common diodes, is output to LED unit after rectified cells D B1, meanwhile, it is and whole
Stream cells D B1 is in parallel to be provided with variable resistor RV1, mainly plays antisurge cushioning effect, avoids LED drive chip 10 from being hit by moment
Wear, improve the reliability of LED drive unit.LED unit includes plurality of LEDs lamp, shows series connection in the present embodiment
LED1 ... LEDn, naturally it is also possible to it is in parallel, series-parallel connection of the series connection with combination in parallel is can also be, these are all common simple connections
Conversion, within the scope of the present invention.Set simultaneously between one end that rectification unit DB1 same N-terminal connects and earth terminal
There is electrochemical capacitor C2, for power filter, improving the average value of supply voltage, so as to improve power-efficient.By adjusting electricity
Solution electric capacity C2 can cause the power factor of whole LED drive circuit（PF）Value is more than 0.5.Pressure-sensitive electricity in LED drive circuit
Resistance RV1, electric capacity C1 mainly play antisurge cushioning effect, avoid LED drive chip breakdown, improve product reliability.Resistance
R3 connects with resistance R4, plays discharge process, and resistance R1 and resistance R2 is used to adjust the constant current value size of LED.And LED
The first current regulation end REXT1, the first earth terminal GND1 of driving chip connect earth terminal GND0, the second electric current after resistance R1
Adjustable side REXT2 connects earth terminal GND0 after resistance R2, and the second earth terminal GND2 end GND0 connected directly to the grounded.LED
The first end of unit is connected with rectification unit, the second end of LED unit be directly connected to all the way the OVP1 of LED drive chip,
OUT1, OVP2 and OUT2, another way are grounded after electric capacity C1 and resistance R1.
Fig. 3 is referred to, Fig. 3 is another preferred embodiment of the LED drive circuit with the LED drive 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 Fig. 2 LED drive circuit
One step is improved.The LED string of LED unit is by the way of in parallel in Fig. 3, by two LEDs driving chips 10 and 20 with parallel connection
Mode drive control LED unit, the two LEDs driving chip 10 is identical with 20 structures, drives the first LED unit and respectively
Two LED units, the first LED unit include the LED1 ... LEDn of series connection, and the second LED unit includes the LEDn+1 ... LEDm of series connection.
The present invention also provides a kind of LED photovoltaic module, including a LED drive circuit, and the LED drive circuit is such as preceding institute
The LED drive circuit stated.It is preferred that the LED photovoltaic module is applied to LED bulb lamps, LED daylight lamp, LED down lamp, LED
In ceiling lamp or LED bay light.
Embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this
The 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, it is included within the scope of the present invention.
Claims (10)
1. a kind of LED drive chip, the LED drive chip includes the first driver element, and first driver element includes：
First current regulation end, the first current output terminal and the first earth terminal；Characterized in that, first driver element also includes：
First over-pressed invariable power test side, it is described for detecting the LED drive chip current operating temperature and operating voltage
LED drive chip controls the first current regulation end and the described first electricity according to the operating temperature and the operating voltage
Stream output end work makes the LED drive 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 detecting the operating temperature of the LED drive chip more than the first preset temperature threshold value, overheat protector work is opened
Pattern；
When the operating temperature for detecting the LED drive chip is less than the first preset temperature threshold value, and operating voltage is in the first electricity
When between pressure value and second voltage value, the LED drive chip enters constant current driving mode of operation；
When the operating temperature for detecting the LED drive chip is less than the first preset temperature threshold value, and operating voltage is more than or equal to
Second voltage value and when being less than third voltage value, the LED drive chip enters over-pressed invariable power mode of operation, wherein described
One magnitude of voltage is less than the second voltage value, and the second voltage value is less than the third voltage value.
2. LED drive chip as claimed in claim 1, it is characterised in that it is single that the LED drive chip also includes the second driving
Member, second driver element and first driver element are packaged in the housing of the LED drive chip in the lump, and described the
Two driver elements include：Second current regulation end, the second current output terminal and the second earth terminal；Characterized in that, described second
Driver element also includes：
Second over-pressed invariable power test side, it is described for detecting the LED drive chip current operating temperature and operating voltage
LED drive chip controls the second current regulation end and the described second electricity according to the operating temperature and the operating voltage
Stream output end work makes the LED drive 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 detecting the operating temperature of the LED drive chip more than the second preset temperature threshold value, overheat protector work is opened
Pattern；
When the operating temperature for detecting the LED drive chip is less than the second preset temperature threshold value, and operating voltage is in the 4th electricity
When between pressure value and the 5th magnitude of voltage, the LED drive chip enters constant current driving mode of operation；
When the operating temperature for detecting the LED drive chip is less than the second preset temperature threshold value, and operating voltage is more than or equal to
5th magnitude of voltage and when being less than six magnitudes of voltage, the LED drive chip enters over-pressed invariable power mode of operation, wherein the 4th electricity
Pressure value is less than the 5th magnitude of voltage, and the 5th magnitude of voltage is less than the 6th magnitude of voltage.
3. LED drive chip as claimed in claim 1, it is characterised in that first electric current of first driver element
Adjustable side is oppositely arranged with first current output terminal, first earth terminal and the described first over-pressed invariable power test side phase
To setting.
4. LED drive chip as claimed in claim 2, it is characterised in that first electric current of first driver element
Adjustable side is oppositely arranged with first current output terminal, first earth terminal and the described first over-pressed invariable power test side phase
To setting, the second current regulation end and second current output terminal of second driver element are oppositely arranged, described
Second earth terminal is oppositely arranged with the described second over-pressed invariable power test side, and first earth terminal, first electric current are adjusted
Section end, second earth terminal and the second current regulation end are sequentially arranged in the first side of the LED drive chip housing, institute
State the first over-pressed invariable power test side, first current output terminal, the second over-pressed invariable power test side and described second
Current output terminal is sequentially arranged in the second side of the LED drive chip housing, the first side of the LED drive chip and described the
Two sides are relative.
5. the LED drive chip as described in any one of claim 2 to 4, it is characterised in that the LED drive chip it is described
First driver element and/or second driver element include an overheat protector hysteresis circuitry, pre- for reaching one in temperature change
If during value, start overheat protector.
6. LED drive chip as claimed in claim 5, it is characterised in that the LED drive chip also includes high pressure drop electric current
Starting point detects 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 drop stream voltage preset value, the LED drive chip is gradually reduced electricity
Stream, until voltage is returned in the drop stream voltage values.
7. LED drive chip as claimed in claim 5, it is characterised in that the LED drive chip includes excess temperature regulation circuit
With the corresponding overheat protector pattern, the excess temperature adjusts circuit according to first described in the temperature adjustment of the LED drive chip
The electric current of current output terminal and/or second current output terminal exports, when the temperature of the LED drive chip is more than the first threshold
During value, exported after current value is reduced into 1/4, when the temperature of the LED drive chip exceedes Second Threshold, close described first
The electric current of current output terminal and/or second current output terminal exports.
8. a kind of LED drive circuit, it is characterised in that the LED drive circuit is included as described in any one of claim 1 to 7
LED drive chip.
9. a kind of LED photovoltaic module, it is characterised in that the LED photovoltaic module includes a LED drive circuit, the LED drivings
Circuit is the LED drive circuit described in claim 8.
10. LED photovoltaic module as claimed in claim 9, it is characterised in that the LED photovoltaic module steeps applied to LED balls
In lamp, LED daylight lamp, LED down lamp, LED ceiling lamp or LED bay light.
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 |
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| CN106341927A CN106341927A (en) | 2017-01-18 |
| CN106341927B true 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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109142930B (en) * | 2018-09-02 | 2021-03-12 | 华域视觉科技(上海)有限公司 | Design verification method for LED driving module of headlamp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3259961B1 (en) * | 2015-02-20 | 2019-12-04 | Hubbell Incorporated | Light emitting diode thermal foldback control device and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN106341927A (en) | 2017-01-18 |
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