CN103311879B - High-power LED driver - Google Patents
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- CN103311879B CN103311879B CN201310206931.2A CN201310206931A CN103311879B CN 103311879 B CN103311879 B CN 103311879B CN 201310206931 A CN201310206931 A CN 201310206931A CN 103311879 B CN103311879 B CN 103311879B
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- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000005669 field effect Effects 0.000 claims description 50
- 230000005611 electricity Effects 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 7
- 206010034133 Pathogen resistance Diseases 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
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- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The present invention relates to a kind of high-power LED driver, its booster converter protection circuit includes comparator, reference voltage generation module, the first electrical switch, the second electrical switch, the first resistance and current detection module；The in-phase end of comparator produces reference voltage module by connecting DC source, and the end of oppisite phase of comparator connects the outfan of the second electrical switch, and the outfan of comparator connects the control end of the first electrical switch；The input of the first electrical switch connects the control end of the second electrical switch, the output head grounding of the first electrical switch；The control end of the second electrical switch connects DC source, the outfan of the second electrical switch passes through current detection module ground connection, the outfan of the second electrical switch connects the control end of the second electrical switch by the first resistance, and the input of the second electrical switch connects great power LED assembly.Foregoing invention can carry out short circuit, overcurrent protection to booster converter.
Description
Technical field
The present invention relates to a kind of high-power LED driver.
Background technology
LED street lamp typically uses great power LED assembly as light source, and it is driven by LED driver
Dynamic, LED driver generally comprises booster converter (BOOST converter) and rectification circuit.
When short trouble occurs in great power LED assembly, produced by load short circuits, big electric current is excessive,
Easily burn changer, power supply can be caused time serious on fire, thus cause fire, exist great
Potential safety hazard.
Summary of the invention
For the deficiencies in the prior art, the purpose of the present invention is intended to provide a kind of great power LED
Driver, it carries out overcurrent protection to booster converter.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of high-power LED driver, it is characterised in that: it include boost conversion circuit,
Rectification circuit, protection circuit, pwm control circuit and constant-current circuit；Protection circuit includes comparing
Device U2, for produce the reference voltage generation module of a reference voltage, the first electrical switch, the
Two electrical switches, resistance R16 and current detection module；The end of oppisite phase of comparator U2 passes through benchmark
Voltage generating module connects a DC source, and the in-phase end of comparator U2 connects the second electrical switch
Outfan, the outfan of comparator U2 connects the control end of the first electrical switch；First electronics
The input of switch connects the control end of this second electrical switch, the outfan of the first electrical switch
Ground connection；The control end of the second electrical switch connects this DC source, this second electrical switch defeated
Go out end and pass through resistance R16 by current detection module ground connection, the outfan of this second electrical switch
Connecting the control end of the second electrical switch, the input of this second electrical switch connects high-power
The voltage output end of LED component, the voltage input end of great power LED assembly by rectification circuit and
Boost conversion circuit connects DC source；Wherein, receive when the control of the first electrical switch terminates
During high level signal, turn between input and the outfan of this first electrical switch, when first
The control termination of electrical switch is when receiving low level signal, the input of this first electrical switch and
End between outfan；When the control of the second electrical switch terminates and receives high level signal, should
Turn between input and the outfan of the second electrical switch, when the control end of the second electrical switch
When receiving low level signal, end between input and the outfan of this second electrical switch；
The outfan of this second electrical switch connects PWM by current detection module and constant-current circuit
Control circuit.
Pwm control circuit includes resistance R1, resistance R2, resistance R5, resistance R18, resistance
R19, resistance R20, electric capacity C7, electric capacity C2, electric capacity C8, diode D3, diode D1 and
Processor U1；The comparison end COMP of this processor U1 connects it by resistance R2 and electric capacity C8
Feedback end VFB, is also connected with the anode of diode D3, and the negative electrode of diode D3 connects Constant Electric Current
Road；The test side CS of processor U1 passes through resistance R20 ground connection, connects it also by resistance R19
The clock end OSC of clock end OSC, this processor U1 passes through electric capacity C7 ground connection, also by electricity
Resistance R18 connects its reference voltage terminal VREF, the voltage end VCC2 of this processor U1 by electricity
Resistance R1 connects DC source VCC, also by electric capacity C2 ground connection；The outfan of this processor U1
OUT, by the source electrode of field effect transistor Q1 connecting boost conversion circuit of resistance R5, also connects
Connecing the negative electrode of diode D1, the anode of diode D1 connects the source electrode of field effect transistor Q1.
This constant-current circuit includes comparator U3, electric capacity C9, resistance R21, resistance R22, resistance
R23, resistance R24 and resistance R25；The outfan of comparator U3 connects pwm control circuit,
The in-phase end of comparator U3 connects the processor U1 of pwm control circuit by resistance R22
Reference voltage terminal VREF, also by resistance R25 and resistance R24 ground connection, this comparator U3
End of oppisite phase connected the outfan of the second electrical switch by resistance R23, also by resistance R21
With the outfan that electric capacity C9 connects comparator U3.
Preferably, reference voltage generation module include stabilivolt ZD1, resistance R8, resistance R9 and
Resistance R14；Current detection module includes resistance R17 and resistance R30；This DC source is successively
By resistance R14, resistance R8 and resistance R9 ground connection, the end of oppisite phase of this comparator U2 is connected to
Node between resistance R8 and resistance R9；The negative electrode of this stabilivolt ZD1 connects resistance R14 and electricity
Node between resistance R8, the plus earth of this stabilivolt ZD1；This second electrical switch defeated
Go out to hold by resistance R17 ground connection, also by resistance R30 ground connection.
Preferably, this first electrical switch is audion Q2, the control of this first electrical switch
End is the base stage of audion Q2, and the input of this first electrical switch is the current collection of audion Q2
Pole, the outfan of this first electrical switch is the emitter stage of audion Q2；
This protection circuit also includes resistance R13, resistance R12, electric capacity C5；This comparator U2's
The outfan base stage by resistance R13 connecting triode Q2, the base stage of this audion Q2 is by electricity
The in-phase end of resistance R12 and electric capacity C5 ground connection, this comparator U2 connect resistance R12 and electric capacity C5 it
Between node；
This second electrical switch is field effect transistor Q3, and the control end of this second electrical switch is field
The grid of effect pipe Q3, the input of this second electrical switch is the drain electrode of field effect transistor Q3,
The outfan of this second electrical switch is the source electrode of field effect transistor Q3；
This protection circuit also includes resistance R10, resistance R11, resistance R15, electric capacity C4 and electricity
Hold C6；The grid of this field effect transistor Q3 connects this DC source by resistance R15；This compares
The in-phase end of device U2 connects the node between resistance R14 and resistance R8 by resistance R10, the most logical
Cross resistance R11 and connect the source electrode of field effect transistor Q3；The in-phase end of this comparator U2 is also by electric capacity
C4 ground connection；The end of oppisite phase of this comparator U2 connects resistance R14 and resistance R8 by electric capacity C6
Between node.
Preferably, boost conversion circuit includes inductance L1, field effect transistor Q1 and resistance R3；Hand over
Stream power supply connects the drain electrode of field effect transistor Q1 by inductance L1, and the grid of field effect transistor Q1 passes through
Resistance R3 ground connection, the source ground of field effect transistor Q1.
Preferably, rectification circuit includes electric capacity C1, resistance R4 and diode D2；Electric capacity C1's
One end connects the drain electrode of field effect transistor Q1, and the other end of electric capacity C1 connects two poles by resistance R4
The negative electrode of pipe D2, is also connected with the voltage input end of great power LED assembly, diode D2's
Anode connects the drain electrode of field effect transistor Q1.
Beneficial effects of the present invention is as follows:
There is short trouble or due to PWM in load such as great power LED assembly in foregoing invention
When control circuit lost efficacy, produced big electric current stream the second electrical switch so that current detecting mould
The voltage instantaneous of block raises, the in-phase end of this high voltage input to comparator, now, due to than
The voltage of the in-phase end of relatively device is more than the reference voltage of end of oppisite phase, the outfan output of this comparator
High level signal is to the control end of the first electrical switch so that the first electrical switch conducting, and then
The control end of the second electrical switch is dragged down ground connection, so that the second electrical switch cut-off, electricity
The high voltage of stream detection module will flow into ground by the first electrical switch moment, so, can keep away
The big electric current that hand-free continues burns boost conversion circuit.
After the high voltage transient of current detection module flows into ground by the first electrical switch, due to this
The voltage of the end of oppisite phase of comparator is more than the voltage of in-phase end, and the outfan output of this comparator is low
Level signal is to the control end of the first electrical switch so that the first electrical switch cut-off, and then makes
The control end obtaining the second electrical switch is pulled to DC source, so that the second electrical switch is led
It is logical, so that great power LED component recovery normally works.
Accompanying drawing explanation
Fig. 1 is the module diagram of the better embodiment of high-power LED driver of the present invention；
Fig. 2 is the circuit diagram of the high-power LED driver of Fig. 1.
Detailed description of the invention
Below, in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further:
Referring to Fig. 1 and Fig. 2, the present invention relates to a kind of high-power LED driver, it is relatively
Good embodiment includes boost conversion circuit 30, rectification circuit 40, protection circuit 50, PWM
Control circuit 20 and constant-current circuit 60.
This protection circuit 50 includes comparator U2, audion Q2, field effect transistor Q3, voltage stabilizing
Pipe ZD1, resistance R8 to R17, resistance R30 and electric capacity C4 to C5.
The end of oppisite phase of this comparator U2 connects a unidirectional current by resistance R8 and resistance R14
Source VCC, also by resistance R9 ground connection, the end of oppisite phase of this comparator U2 is also by electric capacity
C6 connects the node between resistance R8 and resistance R14.The in-phase end of this comparator U2 leads to
Cross resistance R10 and connect the node between resistance R8 and resistance R14, also by resistance R11
Connect field effect transistor Q3 source electrode, the in-phase end of this comparator U2 also by electric capacity C4 ground connection,
Also by electric capacity C5 ground connection.The negative electrode of stabilivolt ZD1 connect resistance R8 and resistance R14 it
Between node, the plus earth of stabilivolt ZD1.The outfan of this comparator U2 is by electricity
The base stage of resistance R13 connecting triode Q2, the base stage of audion Q2 is by resistance R12 even
Connect the in-phase end of this comparator U2, the source ground of audion Q2, the collection of audion Q2
Electrode connects this DC source VCC by resistance R15, connects field effect also by resistance R16
Should the source electrode of pipe Q3, the source electrode of field effect transistor Q3 passes through resistance R17 ground connection, also by electricity
Resistance R30 ground connection, the voltage that the drain electrode of field effect transistor Q3 connects great power LED assembly 70 is defeated
Go out end.The voltage input end of this great power LED assembly 70 passes sequentially through rectification circuit 40 He
Boost conversion circuit 30 connects an alternating current power supply.The source electrode of this field effect transistor Q3 is also by perseverance
Current circuit 60 connects pwm control circuit 20.
There is short trouble or due to pwm control circuit 20 inefficacy in great power LED assembly
Moment may produce big electric current, and this big electric current flows through field effect transistor Q3 so that resistance R17
Raising with the voltage signal moment of resistance R30, this high voltage signal is inputted by resistance R11
To the in-phase end of comparator U2, now, it is more than due to the voltage of the in-phase end of comparator U2
The voltage of end of oppisite phase, the outfan output high level signal of this comparator U2 to audion Q2
Base stage so that audion Q2 turns on, and then the grid of field effect transistor Q3 is dragged down ground connection,
So that the cut-off of field effect transistor Q3, resistance R17 and resistance R30 is used for current detecting, on
The Voltage Feedback that face overcurrent produces is to comparator U2 and pwm control circuit 20, so,
Lasting big electric current can be avoided to burn boost conversion circuit 30.
Flowing through pressure drop produced by the electric current of resistance R17 and resistance R30 is voltage signal, by
Voltage in the end of oppisite phase of this comparator U2 is more than the voltage of in-phase end, this comparator U2's
Outfan output low level signal is to the base stage of audion Q2 so that audion Q2 ends,
And then make the grid of field effect transistor Q3 be pulled to DC source VCC, so that field effect transistor
Q3 turns on, so that great power LED component recovery normally works.
In the present embodiment, stabilivolt ZD1, resistance R8, resistance R9 and resistance R14 are constituted
One for producing the reference voltage generation module of reference voltage.In other embodiments, this benchmark electricity
Pressure generation module can be by some resistance to connect or/and obtain in the way of parallel connection, to produce reality
The reference voltage needed.
Resistance R17 and resistance R30 constitutes one for detecting the current detecting of instantaneous large-current
Module, in other embodiments, if the big electric current that can detect as required of this current detection module by
Dry resistance is to connect or/and form in the way of parallel connection.
This audion Q2 can be other electrical switch such as field effect transistor, even other electronic cuttings
Closing chip, the end that controls of electrical switch is equivalent to the base stage of audion Q2, electrical switch defeated
Entering end and be equivalent to the colelctor electrode of audion Q2, the outfan of electrical switch is equivalent to audion
The emitter stage of Q2.When the control of electrical switch terminates and receives high level signal, this electronic cutting
Turn between the input and the outfan that close, receive low level letter when the control of electrical switch terminates
Number time, between input and the outfan of this electrical switch end.
This field effect transistor Q3 can be other electrical switch such as audion, even other electronic cuttings
Closing chip, the end that controls of electrical switch is equivalent to the grid of field effect transistor Q3, electrical switch
Input is equivalent to the drain electrode of field effect transistor Q3, and the outfan of electrical switch is equivalent to field effect
The source electrode of pipe Q3.When the control of electrical switch terminates and receives high level signal, this electronic cutting
Turn between the input and the outfan that close, receive low level letter when the control of electrical switch terminates
Number time, between input and the outfan of this electrical switch end.The conducting of electrical switch and cutting
Only frequency depends on the self-inspection of voltage signal on current detection module of the in-phase end of comparator U2
Frequency of oscillation, thus when PWM booster circuit part breaks down, electronic cutting also can be kept
The linear current shut is constant.
Boost conversion circuit 30 includes inductance L1, field effect transistor Q1 and resistance R3.Alternating current power supply
Connected the drain electrode of field effect transistor Q1 by inductance L1, the grid of field effect transistor Q1 passes through resistance R3
Ground connection, the source ground of field effect transistor Q1.
Rectification circuit 40 includes electric capacity C1, resistance R4 and diode D2.One end of electric capacity C1 is even
Connecing the drain electrode of field effect transistor Q1, the other end of electric capacity C2 connects diode D2's by resistance
Negative electrode, is also connected with the voltage input end of great power LED assembly, and the anode of diode D2 connects
The drain electrode of field effect transistor Q1.
Pwm control circuit 20 include resistance R1, resistance R2, resistance R5, resistance R18,
Resistance R19, resistance R20, electric capacity C7, electric capacity C2, electric capacity C8, diode D3, diode
D1 and processor U1.The comparison end COMP of this processor U1 passes through resistance R2 and electric capacity C8
Connecting its feedback end VFB, be also connected with the anode of diode D3, the negative electrode of diode D3 is even
Connect constant-current circuit 60.The test side CS of processor U1 passes through resistance R20 ground connection, also by resistance
R19 connects its clock end OSC, and the clock end OSC of this processor U1 passes through electric capacity C7 ground connection,
Its reference voltage terminal VREF, the voltage end of this processor U1 is connected also by resistance R18
VCC2 connects DC source VCC by resistance R1, also by electric capacity C2 ground connection.This processor
The outfan OUT of the U1 field effect transistor connecting boost conversion circuit 30 by resistance R5
The source electrode of Q1, is also connected with the negative electrode of diode D1, and the anode of diode D1 connects field effect
Should the source electrode of pipe Q1.
This constant-current circuit 60 include comparator U3, electric capacity C9, resistance R21, resistance R22,
Resistance R23, resistance R24 and resistance R25.The outfan of this comparator U3 connects PWM and controls
The negative electrode of the diode D3 of circuit 20, the in-phase end of this comparator U3 is connected by resistance R22
The reference voltage terminal VREF of the processor U1 of pwm control circuit 20, also by resistance 25
With resistance R24 ground connection, the end of oppisite phase of this comparator U3 connects field effect transistor Q3 by resistance R23
Source electrode, connect the outfan of comparator U3 also by resistance R21 and electric capacity C9.
For a person skilled in the art, can technical scheme as described above and structure
Think, make other various corresponding changes and deformation, and all these changes and deformation
Within all should belonging to the protection domain of the claims in the present invention.
Claims (5)
1. a high-power LED driver, it is characterised in that: it includes boost conversion circuit, whole
Current circuit, protection circuit, pwm control circuit and constant-current circuit；Protection circuit includes comparing
Device U2, for produce the reference voltage generation module of a reference voltage, the first electrical switch,
Second electrical switch, resistance R16 and current detection module；The end of oppisite phase of comparator U2 passes through
Reference voltage generation module connects a DC source, and the in-phase end of comparator U2 connects second
The outfan of electrical switch, the outfan of comparator U2 connects the control of the first electrical switch
End；The input of the first electrical switch connects the control end of this second electrical switch, and first
The output head grounding of electrical switch；The control end of the second electrical switch connects this DC source,
The outfan of this second electrical switch passes through current detection module ground connection, this second electronic cutting
The outfan closed connects the control end of the second electrical switch, this second electronics by resistance R16
The input of switch connects the voltage output end of great power LED assembly, great power LED assembly
Voltage input end connect DC source by rectification circuit and boost conversion circuit；Wherein,
When the control of the first electrical switch terminates and receives high level signal, this first electrical switch
Input and outfan between turn on, when the first electrical switch control terminate receive low
During level signal, end between input and the outfan of this first electrical switch；When
The control termination of two electrical switches is when receiving high level signal, this second electrical switch defeated
Enter and turn between end and outfan, receive low level when the control of the second electrical switch terminates
During signal, end between input and the outfan of this second electrical switch；This second electricity
The outfan of son switch connects PWM by current detection module and constant-current circuit and controls electricity
Road；
Pwm control circuit include resistance R1, resistance R2, resistance R5, resistance R18, resistance R19,
Resistance R20, electric capacity C7, electric capacity C2, electric capacity C8, diode D3, diode D1 and
Processor U1；The comparison end COMP of this processor U1 is connected by resistance R2 and electric capacity C8
Its feedback end VFB, is also connected with the anode of diode D3, and the negative electrode of diode D3 connects perseverance
Current circuit；The test side CS of processor U1 passes through resistance R20 ground connection, also by resistance R19
Connecting its clock end OSC, the clock end OSC of this processor U1 passes through electric capacity C7 ground connection,
Its reference voltage terminal VREF, the voltage end of this processor U1 is connected also by resistance R18
VCC2 connects DC source VCC by resistance R1, also by electric capacity C2 ground connection；At this
The outfan OUT of reason device U1 is imitated by the field connecting boost conversion circuit of resistance R5
Should the source electrode of pipe Q1, be also connected with the negative electrode of diode D1, the anode of diode D1 is even
Connect the source electrode of field effect transistor Q1；
This constant-current circuit include comparator U3, electric capacity C9, resistance R21, resistance R22, resistance R23,
Resistance R24 and resistance R25；The outfan of comparator U3 connects pwm control circuit,
The in-phase end of comparator U3 connects the processor of pwm control circuit by resistance R22
The reference voltage terminal VREF of U1, also by resistance R25 and resistance R24 ground connection, this compares
The end of oppisite phase of device U3 connects the outfan of the second electrical switch by resistance R23, also by
Resistance R21 and electric capacity C9 connects the outfan of comparator U3.
2. high-power LED driver as claimed in claim 1, it is characterised in that: reference voltage produces
Raw module includes stabilivolt ZD1, resistance R8, resistance R9 and resistance R14；Current detecting
Module includes resistance R17 and resistance R30；This DC source passes sequentially through resistance R14, electricity
Resistance R8 and resistance R9 ground connection, the end of oppisite phase of this comparator U2 is connected to resistance R8 and resistance
Node between R9；The negative electrode of this stabilivolt ZD1 connects between resistance R14 and resistance R8
Node, the plus earth of this stabilivolt ZD1；The outfan of this second electrical switch leads to
Cross resistance R17 ground connection, also by resistance R30 ground connection.
3. high-power LED driver as claimed in claim 2, it is characterised in that: this first electronics
Switch is audion Q2, the base stage that control end is audion Q2 of this first electrical switch,
The input of this first electrical switch is the colelctor electrode of audion Q2, this first electrical switch
The emitter stage that outfan is audion Q2；
This protection circuit also includes resistance R13, resistance R12, electric capacity C5；This comparator U2's
The outfan base stage by resistance R13 connecting triode Q2, the base stage of this audion Q2 is led to
Cross resistance R12 and electric capacity C5 ground connection, the in-phase end of this comparator U2 connect resistance R12 and
Node between electric capacity C5；
This second electrical switch is field effect transistor Q3, and the control end of this second electrical switch is field effect
Should the grid of pipe Q3, the input of this second electrical switch is the drain electrode of field effect transistor Q3,
The outfan of this second electrical switch is the source electrode of field effect transistor Q3；
This protection circuit also includes resistance R10, resistance R11, resistance R15, electric capacity C4 and electric capacity
C6；The grid of this field effect transistor Q3 connects this DC source by resistance R15；This ratio
The relatively in-phase end of device U2 connects the joint between resistance R14 and resistance R8 by resistance R10
Point, connects the source electrode of field effect transistor Q3 also by resistance R11；The homophase of this comparator U2
End is also by electric capacity C4 ground connection；The end of oppisite phase of this comparator U2 connects electricity by electric capacity C6
Node between resistance R14 and resistance R8.
4. high-power LED driver as claimed in claim 1, it is characterised in that: boosting inverter electricity
Road includes inductance L1, field effect transistor Q1 and resistance R3；Alternating current power supply is connected by inductance L1
The drain electrode of field effect transistor Q1, the grid of field effect transistor Q1 passes through resistance R3 ground connection, field effect
The source ground of pipe Q1.
5. high-power LED driver as claimed in claim 1, it is characterised in that: rectification circuit bag
Include electric capacity C1, resistance R4 and diode D2；One end of electric capacity C1 connects field effect transistor
The drain electrode of Q1, the other end of electric capacity C1 connects the negative electrode of diode D2 by resistance R4,
Being also connected with the voltage input end of great power LED assembly, the anode of diode D2 connects field
The drain electrode of effect pipe Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310206931.2A CN103311879B (en) | 2013-05-29 | 2013-05-29 | High-power LED driver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310206931.2A CN103311879B (en) | 2013-05-29 | 2013-05-29 | High-power LED driver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103311879A CN103311879A (en) | 2013-09-18 |
| CN103311879B true CN103311879B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310206931.2A Expired - Fee Related CN103311879B (en) | 2013-05-29 | 2013-05-29 | High-power LED driver |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6800723B2 (en) * | 2016-12-05 | 2020-12-16 | 株式会社ミツトヨ | Encoder and encoder light source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431845A (en) * | 2007-11-05 | 2009-05-13 | 深圳桑达百利电器有限公司 | Driving method and circuit for LED lamp string |
| CN102740572A (en) * | 2012-07-18 | 2012-10-17 | 广州凯盛电子科技有限公司 | Driving power supply control circuit |
| CN102740535A (en) * | 2011-04-12 | 2012-10-17 | 青岛海信电器股份有限公司 | Driving circuit and liquid crystal display (LCD) television |
| CN202818699U (en) * | 2012-08-16 | 2013-03-20 | 重庆雷本光电科技有限公司 | LED automotive headlamp drive circuit |
| CN203279303U (en) * | 2013-05-29 | 2013-11-06 | 广州凯盛电子科技有限公司 | A large-power LED driver and a boost converter protection circuit thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7911812B2 (en) * | 2007-01-22 | 2011-03-22 | Power Integrations, Inc. | Control arrangement for a PFC power converter |
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2013
- 2013-05-29 CN CN201310206931.2A patent/CN103311879B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431845A (en) * | 2007-11-05 | 2009-05-13 | 深圳桑达百利电器有限公司 | Driving method and circuit for LED lamp string |
| CN102740535A (en) * | 2011-04-12 | 2012-10-17 | 青岛海信电器股份有限公司 | Driving circuit and liquid crystal display (LCD) television |
| CN102740572A (en) * | 2012-07-18 | 2012-10-17 | 广州凯盛电子科技有限公司 | Driving power supply control circuit |
| CN202818699U (en) * | 2012-08-16 | 2013-03-20 | 重庆雷本光电科技有限公司 | LED automotive headlamp drive circuit |
| CN203279303U (en) * | 2013-05-29 | 2013-11-06 | 广州凯盛电子科技有限公司 | A large-power LED driver and a boost converter protection circuit thereof |
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| CN103311879A (en) | 2013-09-18 |
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