CN108184292A - A kind of control circuit module of LED driver - Google Patents
A kind of control circuit module of LED driver Download PDFInfo
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- CN108184292A CN108184292A CN201711483982.4A CN201711483982A CN108184292A CN 108184292 A CN108184292 A CN 108184292A CN 201711483982 A CN201711483982 A CN 201711483982A CN 108184292 A CN108184292 A CN 108184292A
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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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- 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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Abstract
The present invention relates to a kind of LED drivers, it discloses a kind of control circuit modules of LED driver, control circuit is detected including timing circuit power supply source and according to the output abnormality that input/output signal is sequentially connected in series, timing control circuit, abnormality indicating circuit, the control circuit module is equipped with to detect control circuit to output abnormality, timing circuit power supply source, the D/C voltage input interface of abnormality indicating circuit power supply, the timing circuit power supply source connects timing control circuit, the voltage output interface for connecting LED load is equipped in the output abnormality detection control circuit, the signal output end feedback link of the timing control circuit detects the signal input part of control circuit to output abnormality.The control circuit module of the LED driver of the present invention can realize the monitoring of LED load exception, avoid the caused negative effect to health of LED lamp load abnormal.
Description
Technical field
The present invention relates to a kind of LED drivers, and in particular to a kind of control circuit module of LED driver.
Background technology
LED light is a kind of lamps and lanterns that developed emerging in recent years, has many advantages, such as efficient, energy-saving and environmental protection.With technology
Development, the manufacture cost of LED lamp is also greatly reduced so that it is obtained for relatively broad market in lighting area
Using.
But there is also some problems in use for current LED light.Such as part LED light is due to its reliability, stabilization
Property is poor, it is caused to will appear LED load abnormal conditions in use, and under LED load abnormal conditions, LED lamp
Human eye is often generated to be not easy to hold the stroboscopic discovered, it, can be to the health of people if LED lamp is continuing under this abnormal conditions
It has a negative impact, such as eye fatigue, dizziness is caused even human body abnormal response etc. occur.Therefore, it is necessary to it is driven in LED
LED load abnormal conditions are monitored in the control circuit of device, so that the user of lamps and lanterns is reminded to find its hidden danger early, and
It is timely replaced to having generated abnormal LED light in using.
Invention content
In order to solve the above-mentioned technical problem, the present invention proposes a kind of control circuit module of LED driver, it is intended to realize
The monitoring of LED load abnormal conditions avoids the caused negative effect to health of LED lamp load abnormal, and then improves
The stability and reliability of LED illumination System work are promoted and simplify safety and convenience of the LED product in terminal applies.Tool
The technical solution of body is as follows：
A kind of control circuit module of LED driver, including timing circuit power supply source and according to input/output signal according to
The output abnormality detection control circuit of secondary concatenation, timing control circuit, abnormality indicating circuit, the control circuit module are set
It is useful for inputting to the D/C voltage of output abnormality detection control circuit, timing circuit power supply source, the power supply of abnormality indicating circuit
Interface, the timing circuit power supply source connect timing control circuit, are equipped with to connect in the output abnormality detection control circuit
The voltage output interface of LED load is connect, the signal output end feedback link of the timing control circuit is detected to output abnormality to be controlled
The signal input part of circuit processed.
In above-mentioned technical proposal, external power supply module is supplied to control circuit module work electricity by control source interface
Pressure, timing circuit power supply source are used to provide operating voltage to timing control circuit, and timing control circuit is used to receive abnormal protection
Signal, while timing controling signal is exported, abnormality indicating circuit is used to export negative under normal condition and abnormal condition
Carry abnormal signal, output abnormality detection control circuit be used for detect LED load abnormality and provide control signal feeding when
Control circuit, and receive the timing signal that timing control circuit is sent out, it is controlled in LED load exception by timing control circuit
Abnormality indicating circuit sends out the signal indicated extremely, the user of lamps and lanterns to be reminded to find the load abnormal of LED light early
Hidden danger, and replaced in time to having generated abnormal LED light in using.
Specifically, it is equipped with to detect LED load exception feelings in the output abnormality of the invention detection control circuit
The abnormality detection control chip U7 of condition and the enhancing for LED load signal to be fed back to the abnormality detection control chip U7
Type N-MOS field-effect tube Q14 is equipped with timing controlled chip U13, enhanced N-MOS field-effect tube in the timing control circuit
Q17, the signal output end of the output abnormality detection control circuit are connected to by the enhanced N-MOS field-effect tube Q17
Timing control circuit, the output abnormality detect in control circuit and are additionally provided with enhanced N-MOS field-effect tube Q16, the timing
The signal output end of control circuit detects control circuit by enhanced N-MOS field-effect tube Q16 feedback links to output abnormality.
In the present invention, the D/C voltage input interface includes supplying to output abnormality detection control circuit, timing circuit
The positive terminal V+ and negative pole end V- of supplies voltages, it is supplied for providing the voltage of operating voltage to abnormality indicating circuit
LEDVCC is held, the voltage output interface of the connection LED load includes positive terminal V+, negative pole end Vout1-.
In the output abnormality detection control circuit of the present invention, the OUT1 pins of abnormality detection control chip U7 pass through electricity
On the one hand resistance R108 is connect with the grid of the enhanced N-MOS field-effect tube Q17 in timing control circuit, on the other hand connect electricity
It is grounded after resistance R124；The OUT2 pins of the abnormality detection control chip U7 pass through resistance R83 link enhancement type N-MOS field-effects
The grid of pipe Q14, negative pole end V- connections shunt resistance RS4 latter aspects and enhanced N- in the D/C voltage input interface
The source electrode of metal-oxide-semiconductor field effect transistor Q14 is connected, and the Vref on the other hand controlling chip U7 by resistance R86 connections abnormality detection is managed
Foot, the Vref pins of the abnormality detection control chip U7 are also grounded by capacitance C32, the enhanced N-MOS field-effect tube
The negative pole end Vout1- of the voltage output interface of the drain electrode connection LED load of Q14；The positive terminal V+ of the D/C voltage input interface
On the one hand the 8 foot VCC ends of abnormality detection control chip U7 are connected to by diode D21, the resistance R81 of forward direction connection, it is another
After aspect with resistance R92 by connecting, then respectively by resistance R95 be connected to abnormality detection control chip U7 IN B- pins,
The IN A- pins of abnormality detection control chip U7 are connected to by resistance R82, abnormality detection control is connected to by resistance R93
The IN B+ pins of chip U7, the IN A- pins of the abnormality detection control chip U7 are also grounded by resistance R85, R84 respectively,
The IN B- pins of the abnormality detection control chip U7 are also grounded by resistance R96；The IN of the abnormality detection control chip U7
On the one hand B+ pins are grounded by resistance R94, on the other hand pass through resistance R104 link enhancement type N-MOS field-effect tube Q16's
Drain electrode, the source electrode ground connection of the enhanced N-MOS field-effect tube Q16, the grid connection of enhanced N-MOS field-effect tube Q16 are fixed
When control circuit signal output end.
In the timing control circuit of the present invention, the pin Vcc and pin Reset of timing controlled chip U13, which are connected, to be determined
When line powering source voltage output end, the pin Discharge and pin Threshold of the timing controlled chip U13 be short
Pass through the voltage output end of resistance R113 connection timing circuit power supply sources, the pin of the timing controlled chip U13 after connecing
It is also grounded after Discharge and pin Threshold short circuits by capacitance C35；The pin Velt of the timing controlled chip U13
It is grounded by capacitance C41, the pin Gnd ground connection of the timing controlled chip U13, the pin Vcc of the timing controlled chip U13
The voltage output end of timing circuit power supply source is connected, on the one hand the pin Trigger of the timing controlled chip U13 passes through resistance
The voltage output end of R105 connection timing circuit power supply sources, the drain electrode of another aspect link enhancement type N-MOS field-effect tube Q17,
The source electrode of the enhanced N-MOS field-effect tube Q17 is grounded by resistance R109, the enhanced N-MOS field-effect tube Q17's
The signal output end of grid connection output abnormality detection control circuit.
In the abnormality indicating circuit of the present invention, it is provided with abnormality indicator elment LED1, LED2, the use
Added respectively by resistance R62, R61 in the voltage for the voltage supply side LEDVCC that operating voltage is provided to abnormality indicating circuit
The anode of abnormality indicator elment LED1, LED2 is downloaded to, the cathode of described abnormality indicator elment LED1, LED2 are grounded,
On the one hand connection output abnormality detects enhanced N-MOS field-effects in control circuit to the signal output end of the timing control circuit
On the other hand the grid of pipe Q16 passes through the base stage of resistance R121 connections NPN triode Q1 0, the transmitting of the NPN triode Q1 0
Pole is grounded, the anode of the collector connection abnormality indicator elment LED1 of the NPN triode Q1 0, and NPN triode Q1 0
Collector also by the base stage of resistance R63 connections NPN triode Q1 1, the emitter of the NPN triode Q1 1 is grounded, described
The anode of the collector connection abnormality indicator elment LED2 of NPN triode Q1 1.
In the present invention, described abnormality indicator elment LED1, LED2 are LED light or sounding component.
In the present invention, voltage stabilizing chip U11 is equipped in the timing circuit power supply source.
In order to improve application flexibility of the control circuit module in LED light, in the control circuit module of the invention
The abnormality detection control circuit of two-way, timing control circuit, abnormality indicating circuit are provided with, the exception inspection including the first via
Survey control circuit (the first abnormality detection control circuit), timing control circuit (the first timing control circuit), abnormality instruction
The second abnormality detection control circuit on circuit (the first abnormality indicating circuit) and the second tunnel, the second timing control circuit,
Second abnormality indicating circuit.
A kind of concrete operating principle of the control circuit module of above-mentioned LED driver is as follows：Its described timing controlled chip
The triggering input terminal Trigger link enhancement type N-MOS field-effect tube Q17's of U13 (555 timing chips or similar functional chip)
Drain electrode, when enhanced N-MOS field-effect tube Q17 grids receive the forward direction electricity from U7 outputs (M2904 or similar functional chips)
It presses and is connected, U13Trigger feet are connected to GND through Q17, R109, and U13Trigger feet become low level from high level, with U13
After timing signal processing caused by the timing circuit of external R113 and C35 compositions, U13Out feet export a high level control
Signal after R107 and R106 partial pressures, is on the one hand given to output abnormality detection control circuit, on the other hand through R121 through Q16
It is given to abnormality indicating circuit.Vout1- output terminals, which are supported on the RS4 resistance of series connection in the load, generates a voltage letter
Number, this signal enters the 3rd feet of U7 (Vref pins) in-phase input end after R86, C32 filtering, with the 2nd feet of U7 (IN A- pins)
Inverting input R82 R84 reference voltage caused by R85 be compared, it is defeated from the 1st feet of U7 (OUT1 pins) signal output end
Go out low and high level control signal, through R108 be given to timing controlled circuit after R124 electric resistance partial pressures；Q16MOS grids receive to make by oneself
When caused by control circuit low and high level control signal, Q16MOS conducting after, be connected in ground by R104, by the 5th feet of U7
(IN B+ pins) in-phase input end level drags down, 5 feet of U7 (IN B+ pins) and 6 feet of U7 (IN B- pins) reverse input end
R95 reference voltage caused by R96 be compared, from the 7th feet of U7 (OUT2 pins) signal output end output low and high level control
Signal controls opening and turning off for Q14MOS through R83 resistance, LED VCC voltages by R61 R62 resistance carried to LED1LED2
For operating current, the low and high level control information of timing controlled chip U13 thirds foot (Out pins) output, by Q10 Q11 tri-
The conducting and shutdown of pole pipe, to realize the conducting of LED1 and LED2 and shutdown.It is thus achieved that under LED load abnormal conditions
The signal output of LED1 and LED2.
In the present invention, the power module being connect with the control circuit module includes going here and there successively according to input/output signal
The AC input EMC (electromagnetic compatibility) connect is converted with current rectifying and wave filtering circuit, PFC circuit of power factor correction, LLC half-bridge resonances power
Circuit exports SR synchronous rectifications filter circuit, constant pressure and flow feedback control circuit, is set in the PFC circuit of power factor correction
Power factor correction controls chip U2, and being equipped with high pressure resonance in the LLC half-bridge resonances circuit for power conversion controls chip U3,
Described export is equipped with synchronous rectification control chip U4 in SR synchronous rectification filter circuits, in the constant pressure and flow feedback control circuit
Chip U5 is controlled, and the output signal feedback link of the constant pressure and flow feedback control circuit is to LLC half-bridges equipped with constant pressure and flow
Resonance power conversion circuit.
In above-mentioned power module, AC input EMC is used to ac input voltage being filtered into DC direct currents with current rectifying and wave filtering circuit
Pressure inhibits with EMC；PFC circuit of power factor correction reduces product harmonic current for improving circuit PF values；LLC half-bridge resonances
Circuit for power conversion：High level DC voltage is changed into output dc voltage；SR synchronous rectifications filter circuit is exported to be used for transformer energy
Amount rectification is converted into secondary output energy；Constant pressure and flow feedback control circuit is used to be detected output voltage electric current, and handle
Information feeds back to the high pressure resonance control chip of LLC half-bridge resonance circuit for power conversion, and control chip is according to the information to defeated
Go out power to be controlled, so as to fulfill constant current.
In the present invention, abnormality detection control chip U7 is using M2904 comparators or similar functional chip, timing controlled chip
U13 uses 555 timing chips or similar functional chip, and voltage stabilizing chip U11 is using 7805 circuit of three-terminal voltage-stabilizing integrated chips or together
Class functional chip, Power Factor Correction Control chip U2 use FAN7930 or similar functional chips, high pressure resonance control chip U3
Using L6599 or similar functional chips, synchronous rectification control chip U4 is using TEA1995 or similar functional chips, constant pressure and flow
Chip U5 is controlled to use M2904 or similar functional chips.
The beneficial effects of the invention are as follows：
First, a kind of control circuit module of LED driver of the invention can pass through timing in LED load exception
Control circuit control abnormality indicating circuit sends out the signal indicated extremely, and LED is found early with the user for reminding lamps and lanterns
The load abnormal hidden danger of lamp, and replaced in time to having generated abnormal LED light in using, so as to avoid LED lamp
Use generates human body health negative effect under abnormal conditions.
Second, the control circuit module of a kind of LED driver of the invention, using doubleway output, and with doubleway output
Maximum power limitation function is conducive to expand the flexibility of its control circuit module application.
Third, the LED driver made of the power module in the present invention and control circuit module, due in power supply mould
PFC circuit of power factor correction, LLC half-bridge resonance circuit for power conversion are provided in block, improves transfer efficiency, and cause work(
Rate factor is promoted by a relatively large margin.
4th, the LED driver made of the power module in the present invention and control circuit module passes through power module
In constant pressure and flow feedback control circuit improve the precision of constant pressure and flow so that the stability and reliability of Led work obtain
Larger raising.
Description of the drawings
Fig. 1 is a kind of functional block diagram of the control circuit module of LED driver of the present invention；
Fig. 2 is on the basis of the control circuit module of Fig. 1, using the control circuit module of the LED driver of doubleway output
Functional block diagram；
Fig. 3 is the circuit theory schematic diagram of power module；
Fig. 4 is the circuit theory schematic diagram of control circuit module；
Fig. 5 is the enlarged drawing of AC input EMC and current rectifying and wave filtering circuit in Fig. 3；
Fig. 6 is the enlarged drawing of PFC circuit of power factor correction in Fig. 3；
Fig. 7 is the enlarged drawing of LLC half-bridge resonance circuit for power conversion in Fig. 3；
Fig. 8 is the enlarged drawing that SR synchronous rectification filter circuits are exported in Fig. 3；
Fig. 9 is the enlarged drawing of constant pressure and flow feedback control circuit in Fig. 3；
Figure 10 is the enlarged drawing of timing circuit power supply source in Fig. 4；
Figure 11 is the enlarged drawing of timing control circuit (the first timing control circuit) in Fig. 4；
Figure 12 is the enlarged drawing of abnormality indicating circuit (the first abnormality indicating circuit) in Fig. 4；
Figure 13 is the enlarged drawing of the second timing control circuit in Fig. 4；
Figure 14 is the enlarged drawing of the second abnormality indicating circuit in Fig. 4；
Figure 15 is the enlarged drawing of output abnormality detection control circuit (the first output abnormality detects control circuit) in Fig. 4；
Figure 16 is in Fig. 4, and the second output abnormality detects the enlarged drawing of control circuit.
In figure：A, power module, B, control circuit module.
In figure：001st, AC input EMC and current rectifying and wave filtering circuit, 002, PFC circuit of power factor correction, 003, LLC half-bridges
Resonance power conversion circuit, 004, output SR synchronous rectification filter circuits, 005, constant pressure and flow feedback control circuit, 006, timing
Line powering source, 007, timing control circuit (the first timing control circuit), 008, abnormality indicating circuit (the first abnormal shape
State indicating circuit), the 009, second timing control circuit, the 010, second abnormality indicating circuit, 011, output abnormality detection control
Circuit (the first output abnormality detects control circuit) processed, the 012, second output abnormality detection control circuit.
Specific embodiment
With reference to the accompanying drawings and examples, the specific embodiment of the present invention is further described.Following embodiment is only
For clearly illustrating technical scheme of the present invention, and it is not intended to limit the protection scope of the present invention and limits the scope of the invention.
Embodiment 1：
If Fig. 1 to 16 show a kind of embodiment of the control circuit module of LED driver of the present invention, including timing line
Road power supply source 006 and the output abnormality detection control circuit 011 being sequentially connected in series according to input/output signal, timing controlled electricity
Road 007, abnormality indicating circuit 008, the control circuit module be equipped with for output abnormality detection control circuit 011,
The D/C voltage input interface that timing circuit power supply source 006, abnormality indicating circuit 008 are powered, the timing circuit power supply source
006 connection timing control circuit 007, the output abnormality detect the voltage being equipped in control circuit 011 for connecting LED load
Output interface, the signal output end feedback link of the timing control circuit 007 detect the letter of control circuit 011 to output abnormality
Number input terminal.
In above-described embodiment, external power supply modules A is supplied to control circuit module B work electricity by control source interface
Pressure, timing circuit power supply source 006 are used to provide operating voltage to timing control circuit 007, and timing control circuit 007 is used to receive
Abnormal protection signal, while export timing controling signal, abnormality indicating circuit 008 is for exporting normal condition and improper
Load abnormal signal under state, output abnormality detection control circuit 011 are used to detect the abnormality of LED load and provide control
Control circuit 007 during signal feeding processed, and receive the timing signal that timing control circuit 007 is sent out, lead in LED load exception
Cross timing control circuit 007 control abnormality indicating circuit send out the signal indicated extremely, with remind the user of lamps and lanterns and
It is early to find the load abnormal hidden danger of LED light, and replaced in time to having generated abnormal LED light in using.
Specifically, it is equipped in the output abnormality detection control circuit 011 of the present embodiment different for detecting LED load
The abnormality detection of reason condition controls chip U7 and for LED load signal to be fed back to the abnormality detection control chip U7's
Enhanced N-MOS field-effect tube Q14, be equipped in the timing control circuit timing controlled chip U13, enhanced N-MOS imitate
Should pipe Q17, the signal output end of the output abnormality detection control circuit passes through the enhanced N-MOS field-effect tube Q17 and connects
Timing control circuit is connected to, enhanced N-MOS field-effect tube Q16 is additionally provided in the output abnormality detection control circuit, it is described
The signal output end of timing control circuit is detected by enhanced N-MOS field-effect tube Q16 feedback links to output abnormality and controlled
Circuit.
In the present embodiment, the D/C voltage input interface is included for output abnormality detection control circuit 011, timing line
Road power supply source 006 provide voltage positive terminal V+ and negative pole end V-, for give abnormality indicating circuit 008 provide operating voltage
Voltage supply side LEDVCC, the voltage output interface of the connection LED load includes positive terminal V+, negative pole end Vout1-.
In the output abnormality detection control circuit 011 of the present embodiment, the OUT1 pins of abnormality detection control chip U7
It is on the one hand connect by resistance R108 with the grid of the enhanced N-MOS field-effect tube Q17 in timing control circuit, on the other hand
It is grounded after connection resistance R124；The OUT2 pins of the abnormality detection control chip U7 pass through resistance R83 link enhancement types N-MOS
The grid of field-effect tube Q14, negative pole end V- connections shunt resistance RS4 latter aspects and enhancing in the D/C voltage input interface
The source electrode of type N-MOS field-effect tube Q14 is connected, and on the other hand controls chip U7's by resistance R86 connections abnormality detection
Vref pins, the Vref pins of the abnormality detection control chip U7 are also grounded by capacitance C32, described N-MOS enhanced
The negative pole end Vout1- of the voltage output interface of the drain electrode connection LED load of effect pipe Q14；The D/C voltage input interface is just
On the one hand extreme V+ is connected to the 8 foot VCC of abnormality detection control chip U7 by diode D21, the resistance R81 of forward direction connection
End, on the other hand by connect with resistance R92 after, then the IN of abnormality detection control chip U7 is connected to by resistance R95 respectively
B- pins, the IN A- pins that abnormality detection control chip U7 is connected to by resistance R82 are connected to abnormal inspection by resistance R93
The IN B+ pins of observing and controlling coremaking piece U7, the IN A- pins of abnormality detection control chip U7 also respectively by resistance R85,
R84 is grounded, and the IN B- pins of the abnormality detection control chip U7 are also grounded by resistance R96；The abnormality detection controls core
On the one hand the IN B+ pins of piece U7 are grounded by resistance R94, on the other hand pass through N-MOS effects of resistance R104 link enhancement types
Should pipe Q16 drain electrode, the enhanced N-MOS field-effect tube Q16 source electrode ground connection, the grid of enhanced N-MOS field-effect tube Q16
Pole connects the signal output end of timing control circuit.
In the timing control circuit 007 of the present embodiment, the pin Vcc and pin Reset of timing controlled chip U13 connect
Meet the voltage output end of timing circuit power supply source, the pin Discharge and pin of the timing controlled chip U13
Pass through the voltage output end of resistance R113 connection timing circuit power supply sources, the timing controlled chip U13 after Threshold short circuits
Pin Discharge and pin Threshold short circuits after be also grounded by capacitance C35；The pipe of the timing controlled chip U13
Foot Velt is grounded by capacitance C41, the pin Gnd ground connection of the timing controlled chip U13, the timing controlled chip U13's
The voltage output end of pin Vcc connection timing circuit power supply sources, the pin Trigger of the timing controlled chip U13 is on the one hand
Pass through the voltage output end of resistance R105 connection timing circuit power supply sources, another aspect link enhancement type N-MOS field-effect tube Q17
Drain electrode, the source electrode of the enhanced N-MOS field-effect tube Q17 is grounded by resistance R109, the enhanced N-MOS field-effects
The signal output end of the grid connection output abnormality detection control circuit of pipe Q17.
In the abnormality indicating circuit 008 of the present embodiment, abnormality indicator elment LED1, LED2 are provided with,
The voltage of the voltage supply side LEDVCC for being used to provide operating voltage to abnormality indicating circuit passes through resistance respectively
R62, R61 are loaded into the anode of abnormality indicator elment LED1, LED2, described abnormality indicator elment LED1, LED2's
Cathode is grounded, and on the one hand connection output abnormality detects enhanced N- in control circuit to the signal output end of the timing control circuit
On the other hand the grid of metal-oxide-semiconductor field effect transistor Q16 passes through the base stage of resistance R121 connections NPN triode Q1 0, the NPN triode
The emitter ground connection of Q10, the anode of the collector connection abnormality indicator elment LED1 of the NPN triode Q1 0, and NPN
The collector of triode Q10 also passes through the base stage of resistance R63 connections NPN triode Q1 1, the emitter of the NPN triode Q1 1
Ground connection, the anode of the collector connection abnormality indicator elment LED2 of the NPN triode Q1 1.
In the present embodiment, described abnormality indicator elment LED1, LED2 are LED light or sounding component.
In the present embodiment, voltage stabilizing chip U11 is equipped in the timing circuit power supply source 006.
In order to improve application flexibility of the control circuit module in LED light, the control circuit module of the present embodiment
In be provided with the abnormality detection control circuit of two-way, timing control circuit, abnormality indicating circuit, the exception including the first via
Detection control circuit (the first abnormality detection control circuit), timing control circuit (the first timing control circuit), abnormality refer to
Show the second abnormality detection control circuit, the second timing controlled electricity of circuit (the first abnormality indicating circuit) and the second tunnel
Road, the second abnormality indicating circuit.
A kind of concrete operating principle of the control circuit module of LED driver of above-described embodiment is as follows：Its described timing
Control N-MOS effects of triggering input terminal Trigger link enhancement types of chip U13 (555 timing chips or similar functional chip)
Should pipe Q17 drain electrode, when enhanced N-MOS field-effect tube Q17 grids receive from U7 export (M2904 or similar functional chips)
Forward voltage and be connected, U13Trigger feet are connected to GND through Q17, R109, and U13Trigger feet become low electricity from high level
Flat, after timing signal processing caused by the timing circuit formed with R113 outside U13 and C35, U13Out feet export a height
Level controling signal after R107 and R106 partial pressures, is on the one hand given to output abnormality detection control circuit, the opposing party through Q16
Face is given to abnormality indicating circuit through R121.Vout1- output terminals are supported on the RS4 resistance of series connection in the load and generate one
A voltage signal, this signal enters the 3rd feet of U7 (Vref pins) in-phase input end after R86, C32 filtering, with the 2nd foot (IN of U7
A- pins) inverting input R82 R84 reference voltage caused by R85 be compared, from the 1st feet of U7 (OUT1 pins) signal
Output terminal output low and high level control signal, through R108 be given to timing controlled circuit after R124 electric resistance partial pressures；Q16MOS grids connect
It receives and comes from low and high level control signal caused by timing control circuit, after Q16MOS conductings, be connected in ground by R104, it will
The 5th feet of U7 (IN B+ pins) in-phase input end level drags down, and 5 feet of U7 (IN B+ pins) are reversed with U76 feet (IN B- pins)
Input terminal R95 reference voltage caused by R96 be compared, from the 7th feet of U7 (OUT2 pins) signal output end export height electricity
Flat control signal controls opening and turning off for Q14MOS through R83 resistance, LED VCC voltages by R61 R62 resistance give
LED1LED2 provides operating current, and the low and high level control information of timing controlled chip U13 thirds foot (Out pins) output is led to
Cross Q10 Q11 triodes conducting and shutdown, to realize the conducting of LED1 and LED2 and shutdown.It is thus achieved that LED load is different
The signal of LED1 and LED2 in the case of often export.
In the present embodiment, the power module being connect with the control circuit module is included according to input/output signal successively
The AC input EMC (electromagnetic compatibility) of concatenation turns with current rectifying and wave filtering circuit, PFC circuit of power factor correction, LLC half-bridge resonances power
It changes circuit, export SR synchronous rectifications filter circuit, constant pressure and flow feedback control circuit, in the PFC circuit of power factor correction
High pressure resonance, which is equipped with, equipped with Power Factor Correction Control chip U2, in the LLC half-bridge resonances circuit for power conversion controls chip
U3, described export are equipped with synchronous rectification control chip U4, the constant pressure and flow feedback control electricity in SR synchronous rectification filter circuits
Constant pressure and flow is equipped in road and controls chip U5, and the output signal feedback link of the constant pressure and flow feedback control circuit is to LLC
Half-bridge resonance circuit for power conversion.
In above-mentioned power module, AC input EMC is used to ac input voltage being filtered into DC direct currents with current rectifying and wave filtering circuit
Pressure inhibits with EMC；PFC circuit of power factor correction reduces product harmonic current for improving circuit PF values；LLC half-bridge resonances
Circuit for power conversion：High level DC voltage is changed into output dc voltage；SR synchronous rectifications filter circuit is exported to be used for transformer energy
Amount rectification is converted into secondary output energy；Constant pressure and flow feedback control circuit is used to be detected output voltage electric current, and handle
Information feeds back to the high pressure resonance control chip of LLC half-bridge resonance circuit for power conversion, and control chip is according to the information to defeated
Go out power to be controlled, so as to fulfill constant current.
PFC circuit of power factor correction, LLC half-bridge resonance circuit for power conversion are provided in above-mentioned power module, is improved
Transfer efficiency, and so that power factor is by a relatively large margin promoted.In addition, control is fed back by the constant pressure and flow in power module
Circuit processed improves the precision of constant pressure and flow so that the stability and reliability of Led work are greatly improved.
In the present embodiment, abnormality detection control chip U7 and U8 is using M2904 comparators or similar functional chip, timing control
Coremaking piece U13 and U12 use 555 timing chips or similar functional chip, and voltage stabilizing chip U11 integrates electricity using 7805 three-terminal voltage-stabilizings
Road chip or similar functional chip, Power Factor Correction Control chip U2 use FAN7930 or similar functional chips, high pressure resonance
Controlling chip U3, synchronous rectification control chip U4 uses TEA1995 or similar function cores using L6599 or similar functional chips
Piece, constant pressure and flow control chip U5 use M2904 or similar functional chips.
Embodiment 2：
Using the control circuit module and power module of embodiment 1, LED driver is fabricated to, measures its transfer efficiency
And power factor, measuring its transfer efficiency is, power factor is that 90.5% power factor is 0.91.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of control circuit module of LED driver, which is characterized in that including timing circuit power supply source and according to input/
The output abnormality that output signal is sequentially connected in series detects control circuit, timing control circuit, abnormality indicating circuit, the control
Circuit module is equipped with to power to output abnormality detection control circuit, timing circuit power supply source, abnormality indicating circuit
D/C voltage input interface, the timing circuit power supply source connect timing control circuit, and the output abnormality is detected in control circuit
Equipped with for connecting the voltage output interface of LED load, the signal output end feedback link of the timing control circuit extremely exports
The signal input part of abnormality detection control circuit.
A kind of 2. control circuit module of LED driver according to claim 1, which is characterized in that the output abnormality
It is equipped in detection control circuit and controls chip U7 and for detecting the abnormality detection of LED load abnormal conditions for LED to be born
Information carrying number feeds back to the enhanced N-MOS field-effect tube Q14 of abnormality detection control chip U7, in the timing control circuit
Equipped with timing controlled chip U13, enhanced N-MOS field-effect tube Q17, the signal output of the output abnormality detection control circuit
End is connected to timing control circuit by the enhanced N-MOS field-effect tube Q17, and the output abnormality is detected in control circuit
Enhanced N-MOS field-effect tube Q16 is additionally provided with, the signal output end of the timing control circuit passes through enhanced N-MOS effect
Should pipe Q16 feedback links to output abnormality detect control circuit.
3. the control circuit module of a kind of LED driver according to claim 2, which is characterized in that the D/C voltage is defeated
Incoming interface includes the positive terminal V+ and negative pole end for providing voltage to output abnormality detection control circuit, timing circuit power supply source
V-, the voltage supply side LEDVCC for providing operating voltage to abnormality indicating circuit, the voltage of the connection LED load
Output interface includes positive terminal V+, negative pole end Vout1-.
A kind of 4. control circuit module of LED driver according to claim 3, which is characterized in that the output abnormality
Detect in control circuit, the OUT1 pins of abnormality detection control chip U7 by resistance R108 on the one hand in timing control circuit
Enhanced N-MOS field-effect tube Q17 grid connection, be grounded after on the other hand connecting resistance R124；The abnormality detection control
The OUT2 pins of coremaking piece U7 pass through the grid of resistance R83 link enhancement type N-MOS field-effect tube Q14, the D/C voltage input
Negative pole end V- connections shunt resistance RS4 latter aspects in interface are connected with the source electrode of enhanced N-MOS field-effect tube Q14,
On the other hand the Vref pins of chip U7 are controlled by resistance R86 connections abnormality detection, the abnormality detection control chip U7's
Vref pins are also grounded by capacitance C32, and the voltage of the drain electrode connection LED load of the enhanced N-MOS field-effect tube Q14 is defeated
The negative pole end Vout1- of outgoing interface；Diode D21, resistance of the positive terminal V+ of the D/C voltage input interface by forward direction connection
On the one hand R81 is connected to the 8 foot VCC ends of abnormality detection control chip U7, on the other hand by being connect with resistance R92 after, then divide
The IN B- pins of abnormality detection control chip U7 are not connected to by resistance R95, abnormality detection control is connected to by resistance R82
The IN A- pins of coremaking piece U7, the IN B+ pins that abnormality detection control chip U7 is connected to by resistance R93, the abnormal inspection
The IN A- pins of observing and controlling coremaking piece U7 are also grounded by resistance R85, R84 respectively, the IN of the abnormality detection control chip U7
B- pins are also grounded by resistance R96；On the one hand the IN B+ pins of the abnormality detection control chip U7 are connect by resistance R94
On the other hand ground passes through the drain electrode of resistance R104 link enhancement type N-MOS field-effect tube Q16, the enhanced N-MOS field-effects
The source electrode ground connection of pipe Q16, the signal output end of the grid connection timing control circuit of enhanced N-MOS field-effect tube Q16.
A kind of 5. control circuit module of LED driver according to claim 3, which is characterized in that the timing controlled
In circuit, the pin Vcc of timing controlled chip U13 connects the voltage output end of timing circuit power supply source with pin Reset, described
The pin Discharge of timing controlled chip U13 connects timing circuit confession with after pin Threshold short circuits by resistance R113
It is also logical after the voltage output end of power supply, the pin Discharge of the timing controlled chip U13 and pin Threshold short circuits
Cross capacitance C35 ground connection；The pin Velt of the timing controlled chip U13 is grounded by capacitance C41, the timing controlled chip
The pin Gnd ground connection of U13, the voltage output end of the pin Vcc connection timing circuit power supply sources of the timing controlled chip U13,
The pin Trigger of the timing controlled chip U13 is on the one hand defeated by the voltage of resistance R105 connection timing circuit power supply sources
Outlet, the drain electrode of another aspect link enhancement type N-MOS field-effect tube Q17, the source of the enhanced N-MOS field-effect tube Q17
Pole is grounded by resistance R109, the grid connection output abnormality detection control circuit of the enhanced N-MOS field-effect tube Q17
Signal output end.
A kind of 6. control circuit module of LED driver according to claim 3, which is characterized in that the abnormality
In indicating circuit, it is provided with abnormality indicator elment LED1, LED2, it is described for abnormality indicating circuit to be given to provide work
The voltage of the voltage supply side LEDVCC of voltage respectively by resistance R62, R61 be loaded into abnormality indicator elment LED1,
The anode of LED2, the cathode ground connection of described abnormality indicator elment LED1, LED2, the signal output of the timing control circuit
On the one hand end connects the grid of enhanced N-MOS field-effect tube Q16 in output abnormality detection control circuit, on the other hand pass through electricity
The base stage of R121 connections NPN triode Q1 0 is hindered, the emitter of the NPN triode Q1 0 is grounded, the NPN triode Q1 0
The anode of collector connection abnormality indicator elment LED1, and the collector of NPN triode Q1 0 is also connected by resistance R63
The base stage of NPN triode Q1 1, the emitter ground connection of the NPN triode Q1 1, the collector connection of the NPN triode Q1 1
The anode of abnormality indicator elment LED2.
A kind of 7. control circuit module of LED driver according to claim 6, which is characterized in that the abnormality
Indicator elment LED1, LED2 are LED light or sounding component.
A kind of 8. control circuit module of LED driver according to claim 1, which is characterized in that the timing circuit
Voltage stabilizing chip U11 is equipped in power supply source.
A kind of 9. control circuit module of LED driver according to claim 2, which is characterized in that the control circuit
The abnormality detection control circuit of two-way, timing control circuit, abnormality indicating circuit are provided in module, including the first via
First abnormality detection control circuit, the first timing control circuit, the first abnormality indicating circuit and the second tunnel it is second different
Often detection control circuit, the second timing control circuit, the second abnormality indicating circuit.
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| CN201711483982.4A CN108184292B (en) | 2017-12-29 | 2017-12-29 | Control circuit module of LED driver |
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| CN201711483982.4A CN108184292B (en) | 2017-12-29 | 2017-12-29 | Control circuit module of LED driver |
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| CN108184292B CN108184292B (en) | 2020-01-14 |
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| CN108184292B (en) | 2020-01-14 |
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Denomination of invention: A control circuit module of LED driver Effective date of registration: 20230215 Granted publication date: 20200114 Pledgee: Jiangyin branch of Bank of China Ltd. Pledgor: JIANGYIN WONDER ELECTRONIC CO.,LTD. Registration number: Y2023980032692 |
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