CN106507531A - A kind of LED illumination power drives chip and drive circuit - Google Patents
A kind of LED illumination power drives chip and drive circuit Download PDFInfo
- Publication number
- CN106507531A CN106507531A CN201610846601.3A CN201610846601A CN106507531A CN 106507531 A CN106507531 A CN 106507531A CN 201610846601 A CN201610846601 A CN 201610846601A CN 106507531 A CN106507531 A CN 106507531A
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- current
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- driving chip
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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
-
- 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
-
- 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
A kind of LED illumination power drives chip and drive circuit, are related to LED illumination power supply.Driving chip internal circuit configuration includes Power Entry Module, fiducial reference source, output voltage detection module, Cycle by Cycle current-limiting protection module, logic controller, power supply driver, latch, saw-toothed wave generator, comparator, operational amplifier and over-temperature protection unit；Drive circuit includes LED illumination power drives chip, fuse F1, protection diode D1; rectifier bridge, transformer T1, protection diode D3; metal-oxide-semiconductor Q1, current-limiting resistance R1, R4, R3, R5, R7, R8, current sense resistor R9, filter capacitor C1, C2, C3 and C5；There is high PFC, low-power consumption, high precision constant current voltage stabilizing, and there is excess temperature, overvoltage, the multiple safety precautions of under-voltage, short-circuit and open-circuit-protection while the features such as controlling with non-pole light regulating, is particularly suited for the specific working environment of wisdom piping lane.
Description
Technical field
The present invention relates to LED illumination power supply, more particularly, to a kind of LED illumination power drives chip and drive circuit.
Background technology
At present, LED illumination application is quite varied, but its power driving circuit is unsatisfactory, there is power factor (PF) relatively low
The problems such as (PFC is relatively low), power consumption are larger, constant-current voltage-stabilizing precision is relatively low, have impact on reliability and the life-span of LED illumination, and which is main
Reason is that driving chip designs undesirable caused problem.
Content of the invention
It is an object of the invention to provide a kind of have high PFC, low-power consumption, high precision constant current voltage stabilizing, and there is excess temperature, mistake
Pressure, the multiple safety precautions of under-voltage, short-circuit and open-circuit-protection are while the features such as controlling with non-pole light regulating, especially suitable
LED illumination power drives chip and drive circuit under the specific working environment of wisdom piping lane.
For achieving the above object, the present invention is adopted the following technical scheme that：
A kind of LED illumination power drives chip, its internal circuit structure include Power Entry Module, fiducial reference source, defeated
Go out voltage detection module, Cycle by Cycle current-limiting protection module, logic controller, power supply driver, latch, saw-toothed wave generator,
Comparator, operational amplifier and over-temperature protection unit；
The Power Entry Module includes VCC under-voltage protection units, VCC clampers and Overvoltage protecting unit；The VCC is under-voltage
Protection location one end is connected with supply voltage, and the other end is connected with the fiducial reference source, output end and the latch after comparing
Device set end connects；The VCC clampers and Overvoltage protecting unit one end are connected with supply voltage, and the other end is put with the latch
The connection of position end；
The output voltage detection module includes output over-voltage protection unit and output clamper and zero passage detection unit；Output
Overvoltage protecting unit and output clamper and zero passage detection unit one end are connected with test side, and the other end is connected with latch set end
Connect；
The operational amplifier is connected with comparator input negative terminal, and saw-toothed wave generator is connected with comparator input positive terminal,
Comparator output terminal is connected with latch reset end；
The Cycle by Cycle current-limiting protection module is connected with logic controller, and logic controller one end is connected with latch output
Connect, the other end is connected with power supply driver；
The over-temperature protection unit is connected with latch set end.
A kind of LED illumination power driving circuit, including above-mentioned driving chip, fuse F1, protection diode D1, rectification
Bridge, transformer T1, protection diode D3, metal-oxide-semiconductor Q1, current-limiting resistance R1, R4, R3, R5, R7, R8, current sense resistor R9, filter
Ripple electric capacity C1, C2, C3 and C5；
Alternating current is connected with rectifier bridge by fuse F1, and rectifier bridge output direct current is by protection diode D1 and current limliting
Resistance R1 powers to driving chip, shunt capacitance C1 in parallel and ground connection, driving chip power input and filtered electrical after rectifier bridge
Hold the connection of C3, current-limiting resistance R5 and protection diode D3, driving chip opamp input terminal FB through current-limiting resistance R3 and
Current sense resistor R9 is connected to ground, and comparator control end Ctrl of driving chip is connected with ground by the filter capacitor C2 of bypass
Connect, the saw-toothed wave generator of driving chip is connected to ground by current-limiting resistance R4, the output detection module of driving chip is by limit
Leakage resistance R7 is connected with transformer T1 intermediate ends, and the driving power supply output end of driving chip is connected with Mos pipe Q1 grids, metal-oxide-semiconductor
Q1 source electrodes are connected with rectifier bridge power end, and metal-oxide-semiconductor Q1 drain electrodes are connected to ground by current sense resistor R9, transformer T1 output ends
Parallel filtering electric capacity C5 and current-limiting resistance R8, is that LED is powered.
Compared with the prior art, beneficial effects of the present invention are as follows：
The present invention is designed including meeting intelligence using advanced IC design technology and the high PFC power-saving technologies of power supply
The high efficiency of the LED semiconductor lighting products under the specific working environment of intelligent piping lane, the LED cores driving chip of high PFC with
Driving power supply circuit.Provide the LED photographs of a kind of high reliability, long-life, good Electro Magnetic Compatibility, environmental protection and energy saving, low cost
Bright power solution, the high-power LED illumination application-specific integrated circuit product of high PFC and power supply driver, can meet domestic light fixture to driving
The demand of dynamic power supply energy-conservation, high-performance, high reliability and low cost, while meet in wisdom piping lane intelligent luminaire product pair
The demand of driving power supply, can break Europe, the United States, day semiconductor chip company LED field of semiconductor illumination monopoly position.This
Bright with high PFC, high precision constant current voltage stabilizing, low-power consumption, and have excess temperature, overvoltage, the multiple safety of under-voltage, short-circuit and open-circuit-protection
Safeguard measure is while with non-pole light regulating control, peripheral applications circuit is simple, the outstanding advantages such as low cost.
Description of the drawings
Fig. 1 is driving chip embodiment internal circuit blocks structural representation of the present invention.
Fig. 2 is the circuit theory diagrams of drive circuit embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, a kind of LED illumination power drives chip, its internal circuit structure include Power Entry Module, benchmark ginseng
Examine source, output voltage detection module, Cycle by Cycle current-limiting protection module, logic controller, power supply driver, latch, sawtooth waveforms
Generator, comparator, operational amplifier and over-temperature protection unit.
The Power Entry Module includes VCC under-voltage protection units, VCC clampers and Overvoltage protecting unit；The VCC is under-voltage
Protection location one end is connected with supply voltage, and the other end is connected with the fiducial reference source, output end and the latch after comparing
Device set end connects；The VCC clampers and Overvoltage protecting unit one end are connected with supply voltage, and the other end is put with the latch
The connection of position end.
The output voltage detection module includes output over-voltage protection unit and output clamper and zero passage detection unit；Output
Overvoltage protecting unit and output clamper and zero passage detection unit one end are connected with test side, and the other end is connected with latch set end
Connect.
The operational amplifier is connected with comparator input negative terminal, and saw-toothed wave generator is connected with comparator input positive terminal,
Comparator output terminal is connected with latch reset end.
The Cycle by Cycle current-limiting protection module is connected with logic controller, and logic controller one end is connected with latch output
Connect, the other end is connected with power supply driver.
The over-temperature protection unit is connected with latch set end.
Fig. 2 is participated in, a kind of LED illumination power driving circuit, including above-mentioned driving chip, fuse F1, protection diode
D1, rectifier bridge, transformer T1, protection diode D3, metal-oxide-semiconductor Q1, current-limiting resistance R1, R4, R3, R5, R7, R8, current detecting electricity
Resistance R9, filter capacitor C1, C2, C3 and C5；
Alternating current is connected with rectifier bridge by fuse F1, and rectifier bridge output direct current is by protection diode D1 and current limliting
Resistance R1 powers to driving chip, shunt capacitance C1 in parallel and ground connection, driving chip power input and filtered electrical after rectifier bridge
Hold the connection of C3, current-limiting resistance R5 and protection diode D3, driving chip opamp input terminal FB through current-limiting resistance R3 and
Current sense resistor R9 is connected to ground, and comparator control end Ctrl of driving chip is connected with ground by the filter capacitor C2 of bypass
Connect, the saw-toothed wave generator of driving chip is connected to ground by current-limiting resistance R4, the output detection module of driving chip is by limit
Leakage resistance R7 is connected with transformer T1 intermediate ends, and the driving power supply output end of driving chip is connected with Mos pipe Q1 grids, metal-oxide-semiconductor
Q1 source electrodes are connected with rectifier bridge power end, and metal-oxide-semiconductor Q1 drain electrodes are connected to ground by current sense resistor R9, transformer T1 output ends
Parallel filtering electric capacity C5 and current-limiting resistance R8, is that LED is powered.
As seen from the above-described embodiment, the present invention is the high-power factor AC/DC LED drives based on primary side feedback technology
Dynamic chip.Only needing to few peripheral cell just can be with precise control LED current, and without the need for optocoupler and secondary feedback circuit；Electricity
Sense is operated in determines frequency discontinuous mode；Driving chip has been internally integrated complete defencive function, and including current-limiting protection, output voltage is protected
Shield, output short circuit protection and overheat protector.Product peripheral application circuit is simple, high reliability, long-life, Electro Magnetic Compatibility
Good, environmental protection and energy saving, the characteristics of inexpensive, can make up blank of the China in many performance power management chips of the high PFC of low-power consumption.
Embodiment of the present invention operation principle is as follows：
1) Mos pipes (power tube) Q1 conductings：Power supply is by the main sides of transformer T1 (1 2) and power tube Q1 and current detecting electricity
Resistance Rcs so that transformer T1 energy storage, until it reaches chip internal control time ton, now the main side peak point currents of transformer T1 are false
It is set to Ipp, power tube is turned off；
2) Mos pipes (power tube) Q1 shut-offs：As the main sides of transformer T1 do not have discharge path, therefore transformer T1 electric currents pass through
Secondary (5 6) flows through 3 couples of load LED and electric capacity C3 of sustained diode and charges, and after transformer T1 energy is released, waits next
The arriving of individual turn-on cycle；
3) assume initially that transformer T1 energy is transmitted without losing, then the peak point current for obtaining during power tube Q1 conductings
Ipp, during Mos pipe (power tube) Q1 are turned off, energy is transmitted to load, if the turn ratio of the main side of transformer T1 and secondary
For n：1, then under stable case, output loading LED average currents are finally obtained for fly-wheel diode average current, then may be used
To obtain output loading LED average currents it is
Iled=1/2*n*Ipp*tdis/T
Wherein tdis is the inductance degaussing time, and T is the cycle；
4) and peak point current Ipp flows through current sense resistor Rcs, obtain voltage Vcs and be input to chip CS pin position, by taking
Sample circuit obtains the crest voltage Vcspp of Vcs, obtains degaussing time tdis by assists winding partial pressure input signal Vaux, and
Cycle T is the operating frequency corresponding cycle in chip, and chip internal is by the value of control Vcspp*tdis/T and reference electricity
Pressure 0.2v is relatively input to error amplifier, and which exports Vea to control ON time ton, can obtain a current regulator
Road；
Output loading LED current may finally be obtained is
Iled=1/2*n*200mV/Rcs
Wherein Rcs is the current sense resistor in typical case's application；
After testing, the embodiment of the present invention has the advantage that：
1. wide input voltage range width：80V-300V
2. electric current constant current accuracy is high：± 3%；Constant current output electric current：20mA-1000mA；
3. high conversion efficiency：It is better than 85%；
4. high PFC：0.92；
5. PWM non-pole light regulatings are received；
6. operating temperature：-40℃—+85℃；There is the safety protection functions such as excess temperature, overvoltage, under-voltage, short-circuit and open circuit；
7. CE, UL certification is supported in the driving of chip solution.
Claims (2)
1. a kind of LED illumination power drives chip, it is characterised in that：Its internal circuit structure includes Power Entry Module, benchmark
Reference source, output voltage detection module, Cycle by Cycle current-limiting protection module, logic controller, power supply driver, latch, sawtooth
Wave producer, comparator, operational amplifier and over-temperature protection unit；
The Power Entry Module includes VCC under-voltage protection units, VCC clampers and Overvoltage protecting unit；The VCC under-voltage protections
Unit one end is connected with supply voltage, and the other end is connected with the fiducial reference source, and after comparing, output end is put with the latch
The connection of position end；The VCC clampers and Overvoltage protecting unit one end are connected with supply voltage, the other end and the latch set end
Connection；
The output voltage detection module includes output over-voltage protection unit and output clamper and zero passage detection unit；Output overvoltage
Protection location and output clamper and zero passage detection unit one end are connected with test side, and the other end is connected with latch set end；
The operational amplifier is connected with comparator input negative terminal, and saw-toothed wave generator is connected with comparator input positive terminal, is compared
Device output end is connected with latch reset end；
The Cycle by Cycle current-limiting protection module is connected with logic controller, and logic controller one end is connected with latch output, separately
One end is connected with power supply driver；
The over-temperature protection unit is connected with latch set end.
2. a kind of LED illumination power driving circuit, it is characterised in that：Including driving chip as claimed in claim 1, fuse
F1, protection diode D1, rectifier bridge, transformer T1, protection diode D3, metal-oxide-semiconductor Q1, current-limiting resistance R1, R4, R3, R5, R7,
R8, current sense resistor R9, filter capacitor C1, C2, C3 and C5；
Alternating current is connected with rectifier bridge by fuse F1, and rectifier bridge output direct current is by protection diode D1 and current-limiting resistance
R1 powers to driving chip, shunt capacitance C1 in parallel and ground connection after rectifier bridge, driving chip power input and filter capacitor C3,
Current-limiting resistance R5 and the connection of protection diode D3, driving chip opamp input terminal FB are examined through current-limiting resistance R3 and electric current
Measuring resistance R9 is connected to ground, and comparator control end Ctrl of driving chip is connected to ground by the filter capacitor C2 for bypassing, and is driven
The saw-toothed wave generator of chip is connected to ground by current-limiting resistance R4, and the output detection module of driving chip passes through current-limiting resistance R7
Be connected with transformer T1 intermediate ends, the driving power supply output end of driving chip is connected with Mos pipe Q1 grids, metal-oxide-semiconductor Q1 source electrodes with
Rectifier bridge power end connects, and metal-oxide-semiconductor Q1 drain electrodes are connected to ground by current sense resistor R9, transformer T1 output end parallel filterings
Electric capacity C5 and current-limiting resistance R8, is that LED is powered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846601.3A CN106507531A (en) | 2016-09-23 | 2016-09-23 | A kind of LED illumination power drives chip and drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610846601.3A CN106507531A (en) | 2016-09-23 | 2016-09-23 | A kind of LED illumination power drives chip and drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN106507531A true CN106507531A (en) | 2017-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610846601.3A Pending CN106507531A (en) | 2016-09-23 | 2016-09-23 | A kind of LED illumination power drives chip and drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113056063A (en) * | 2021-03-31 | 2021-06-29 | 黄山市瑞兴汽车电子有限公司 | High-precision and high-reliability LED car lamp driving circuit |
| CN113533837A (en) * | 2021-06-23 | 2021-10-22 | 上海南土信息科技有限公司 | Alternating current detection module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203708547U (en) * | 2013-12-11 | 2014-07-09 | 晨硕（厦门）实业有限公司 | A single-button memory LED light modulation control circuit |
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2016
- 2016-09-23 CN CN201610846601.3A patent/CN106507531A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203708547U (en) * | 2013-12-11 | 2014-07-09 | 晨硕（厦门）实业有限公司 | A single-button memory LED light modulation control circuit |
Non-Patent Citations (1)
| Title |
|---|
| 泉芯电子技术(深圳)有限公司: "QX9911芯片2014版规格书", 《泉芯QX9911规格书(2014版)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113056063A (en) * | 2021-03-31 | 2021-06-29 | 黄山市瑞兴汽车电子有限公司 | High-precision and high-reliability LED car lamp driving circuit |
| CN113056063B (en) * | 2021-03-31 | 2024-02-23 | 黄山市瑞兴汽车电子有限公司 | High-precision high-reliability LED car lamp driving circuit |
| CN113533837A (en) * | 2021-06-23 | 2021-10-22 | 上海南土信息科技有限公司 | Alternating current detection module |
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Application publication date: 20170315 |
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