CN110381644A

CN110381644A - A kind of constant current LED drive circuit for integrating emergency lighting

Info

Publication number: CN110381644A
Application number: CN201910771688.6A
Authority: CN
Inventors: 柳森坊; 江华荣; 郑榕龙; 卢凯
Original assignee: XIAMEN YADE ELECTRONIC TECHNOLOGY CO LTD
Current assignee: XIAMEN YADE ELECTRONIC TECHNOLOGY CO LTD
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2019-10-25
Anticipated expiration: 2039-08-21
Also published as: CN110381644B

Abstract

The present invention relates to LED drive circuits, in particular to a kind of constant current LED drive circuit for integrating emergency lighting, correction output will be carried out to power factor after the alternating voltage filter rectification of input by the way that primary side power-switching circuit is arranged, DC voltage is converted into through secondary side current rectifying and wave filtering circuit, DC voltage is powered to two parts respectively: first part reduces voltage by Buck circuit, for battery charger power supply, battery charger carries out constant current, constant-voltage charge to battery；Second part provides constant current driving in normal mode, by conventional Boost circuit for LED, and when entering under emergency rating, lithium battery provides Constant-power drive to LED light by emergency Boost circuit；Switching judging circuit of meeting an urgent need detection current state realizes the switching of normal mode constant-current LED driving and emergency lighting mode.

Description

A kind of constant current LED drive circuit for integrating emergency lighting

Technical field

The present invention relates to LED drive circuit, in particular to a kind of constant current LED drive circuit for integrating emergency lighting.

Background technique

Emergency lighting is the illumination enabled by the power-fail of normal illumination, and emergency lighting at present uses independent emergency Lighting controller and independent LED driving realize that in this way on lamp assembled, the occupied space of hardware is big, circuit connection is complicated And higher cost.

Summary of the invention

The technical problems to be solved by the present invention are: providing a kind of constant current LED drive circuit for integrating emergency lighting.

In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:

A kind of constant current LED drive circuit for integrating emergency lighting, including primary side power-switching circuit, secondary side rectification circuit, Buck circuit, battery charger, emergency Boost circuit, emergency switching judging circuit and conventional Boost circuit；

The output end of the primary side power-switching circuit is electrically connected with the input terminal of the secondary side rectification circuit, the pair side The output end of rectification circuit is electrically connected with the input terminal of the Buck circuit, and output end and the battery of the Buck circuit fill The input terminal of circuit is electrically connected, the input terminal electricity of the output end of the battery charger and the emergency switching judging circuit Connection, the output end of the emergency switching judging circuit are electrically connected with the input terminal of the conventional Boost circuit.

The beneficial effects of the present invention are:

Power factor will be corrected after the alternating voltage filter rectification of input by the way that primary side power-switching circuit is arranged Output is converted into DC voltage through secondary side current rectifying and wave filtering circuit, and DC voltage is powered to two parts respectively: first part passes through Buck circuit reduces voltage, powers for battery charger, and battery charger carries out constant current, constant-voltage charge to battery；The Two parts provide constant current driving in normal mode, by conventional Boost circuit for LED, under entrance emergency rating, lithium battery Constant-power drive is provided to LED light by emergency Boost circuit；Switching judging circuit of meeting an urgent need detection current state realizes conventional mould The switching of formula constant-current LED driving and emergency lighting mode.

Detailed description of the invention

Fig. 1 is a kind of integrated circuit module box for the constant current LED drive circuit for integrating emergency lighting according to the present invention Figure；

Fig. 2 is a kind of primary side power-switching circuit for the constant current LED drive circuit for integrating emergency lighting according to the present invention Circuit diagram；

Fig. 3 is a kind of electricity of the secondary side rectification circuit for the constant current LED drive circuit for integrating emergency lighting according to the present invention Road schematic diagram；

Fig. 4 is that a kind of circuit of Buck circuit for the constant current LED drive circuit for integrating emergency lighting according to the present invention is former Reason figure；

Fig. 5 is a kind of electricity of the battery charger for the constant current LED drive circuit for integrating emergency lighting according to the present invention Road schematic diagram；

Fig. 6 is a kind of electricity of the emergency Boost circuit for the constant current LED drive circuit for integrating emergency lighting according to the present invention Road schematic diagram；

Fig. 7 is a kind of emergency switching judging circuit for the constant current LED drive circuit for integrating emergency lighting according to the present invention With the circuit diagram of conventional Boost circuit；

Label declaration:

1, EMC filter rectifier；2, PSR circuit；3, secondary side rectification circuit；4, Buck circuit；5, battery charger； 6 emergency Boost circuits；7, emergency switching judging circuit；8, conventional Boost circuit.

Specific embodiment

To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and cooperate attached Figure is explained.

Fig. 1 is please referred to, technical solution provided by the invention:

As can be seen from the above description, the beneficial effects of the present invention are:

Further, the primary side power-switching circuit includes EMC filter rectifier and PSR circuit, the EMC filtering The output end of rectification circuit is electrically connected with the input terminal of the PSR circuit, and the output end of the PSR circuit and the secondary side rectify The input terminal of circuit is electrically connected.

Seen from the above description, EMC filter rectifier will give PSR circuit to supply after the alternating voltage filter rectification of input Electricity, PSR circuit is other than power factor correction, additionally it is possible to transfer the energy to secondary side rectifying and wave-filtering electricity by isolating transformer Road is converted into DC voltage through secondary side current rectifying and wave filtering circuit.

Further, the EMC filter rectifier includes rectifier bridge DB1, capacitor C1, capacitor C2, X capacitor CX1, Y electricity Hold CY2, Y capacitance CY3, varistor RV1, magnetic induction loop L3, transformer T1, transformer T2, insurance resistance F1 and insert row CON1；

The insert row CON1 includes the first pin, second pin and third pin, the first end of the rectifier bridge DB1 and institute One end electrical connection of the armature winding of transformer T2 is stated, the other end of the armature winding of the transformer T2 is electric with the Y respectively Hold one end electrical connection of the armature winding of one end of CY2, one end of X capacitor CX1 and transformer T1, the primary of the transformer T1 The other end of winding is electrically connected with one end of one end of the varistor RV1 and insurance resistance F1 respectively, the insurance resistance The other end of F1 is electrically connected with the second pin of the insert row CON1, the first pin of the insert row CON1 respectively with it is described pressure-sensitive One end of the secondary windings of the other end and transformer T1 of resistance RV1 is electrically connected, the secondary windings of the transformer T1 it is another End is electrically connected with one end of the secondary windings of the other end of the X capacitor CX1, one end of Y capacitance CY1 and transformer T2 respectively, The other end of the secondary windings of the transformer T2 is electrically connected with the second end of the rectifier bridge DB1, and the Y capacitance CY2's is another One end is electrically connected with the third pin of the other end of the Y capacitance CY1 and insert row CON1 respectively, the third of the rectifier bridge DB1 End be electrically connected respectively with one end of one end of the capacitor C1 and magnetic induction loop L3, the other end of the magnetic induction loop L3 with it is described One end of capacitor C2 is electrically connected, the other end of the capacitor C2 respectively with the other end of the capacitor C1 and rectifier bridge DB1 the 4th end of the electrical connection of four ends and the other end of the capacitor C2, the other end of capacitor C1 and rectifier bridge DB1 is grounded.

Seen from the above description, insurance resistance F1 provides abnormal protection for power supply, and X capacitor CX1 is the filtering of EMC differential mode, leads to It crosses setting magnetic induction loop L3, capacitor C1 and capacitor C2 constitutes EMC differential mode π type filter circuit, to filter out DM EMI；Y capacitance CY1, Y capacitance CY2, transformer T1 and transformer T2 constitute EMC common mode filtering circuit, interfere to filtering common mode, the friendship of input Galvanic electricity is converted into DC voltage by rectifier bridge DB1.

Further, the PSR circuit includes chip U1, resistance R1, resistance R5, resistance R6, resistance R7, resistance R8, electricity Hinder R9, resistance R10, resistance R11, resistance R12, resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, Resistance R20, resistance R21, resistance R39, resistance R42, resistance R43, capacitor C5, capacitor C7, capacitor C8, capacitor C9, capacitor C10, Capacitor C11, capacitor C12, Y capacitance CY1, electrolytic capacitor CE1, diode D1, diode D2, diode D4, magnetic induction loop TR1A, Magnetic induction loop TR1B and field-effect tube Q2；

The chip U1 includes the first pin, second pin, third pin, the 4th pin, the 5th pin and the 6th pin, The first pin of the chip U1 and the one of one end of the resistance R8, one end of resistance R9, one end of resistance R10 and capacitor C8 End electrical connection, the second pin of the chip U2 respectively with one end of the capacitor C5, one end of resistance R9, resistance R10 one The electrical connection of the other end of end and capacitor C8 and the second pin of the chip U1, one end of capacitor C5, one end of resistance R9, resistance One end of R10 and the other end of capacitor C8 are grounded, the third pin of the chip U1 respectively with the other end of the capacitor C5, One end of the cathode of diode D2, one end of electrolytic capacitor CE1 and resistance R12 is electrically connected, the other end of the resistance R12 and institute State resistance R11 one end electrical connection, the other end of the resistance R11 respectively with one end of the resistance R1, resistance R42 one One end electrical connection at end, one end of capacitor C12, one end of Y capacitance CY1 and magnetic induction loop TR1A, the Y capacitance CY1's is another End ground connection, the other end of the resistance R1 respectively with the other end of the resistance R42, one end of resistance R43 and resistance R39 one End electrical connection, the other end of the resistance R43 and the other end of the resistance R39, the other end of capacitor C12, resistance R5 one End and one end of resistance R6 are electrically connected, the other end of the resistance R5 and the other end of the resistance R6 and the cathode of diode D1 Electrical connection, the anode of the diode D1 source electrode and electricity with the other end of the magnetic induction loop TR1A, field-effect tube Q2 respectively Hold C7 one end electrical connection, the field-effect tube Q2 drain electrode respectively with the other end of the capacitor C7, resistance R19 one end, One end electrical connection of one end of resistance R20, one end of resistance R18, one end of resistance R17 and resistance R21, the resistance R20's The other end is electrically connected respectively with the other end of the other end of the resistance R19 and resistance R18 and the other end of the resistance R20, The other end of resistance R19 and the other end of resistance R18 are grounded, the grid of the field-effect tube Q2 respectively with the resistance R21 One end, diode D4 anode and resistance R16 one end electrical connection, the cathode of the diode D4 respectively with the resistance One end electrical connection of the other end and resistance R15 of R16, the 4th pin electricity of the other end of the resistance R15 and the chip U1 Connection, the 5th pin of the chip U1 is electrically connected with the other end of one end of the capacitor C11 and resistance R17 respectively, described The 6th pin of chip U1 is electrically connected with one end of one end of the resistance R14 and capacitor C9 respectively, and the capacitor C9's is another End is electrically connected respectively with the other end of the other end of the capacitor C10 and capacitor C11 and the other end, the capacitor of the capacitor C9 The other end of C10 and the other end of capacitor C11 are grounded, the other end of the resistance R8 respectively with one end of the resistance R7 and One end of magnetic induction loop RT1B is electrically connected, the other end electricity of the other end of the magnetic induction loop RT1B and the electrolytic capacitor CE1 It connects and the other end of the magnetic induction loop RT1B and the other end of electrolytic capacitor CE1 is grounded, the other end of the resistance R7 It is electrically connected with the anode of the diode D2.

Seen from the above description, the switch that a PWM square wave controls field-effect tube Q2 is exported by control chip U1, on the spot When effect pipe Q2 is connected, electric current rises according to certain slope, and transformer TR1 stores energy；After field-effect tube Q2 shutdown, transformation Device TR1 provides energy to secondary side and auxiliary winding, while chip U1 is improved active power, subtracted by constant conduction control program Small harmful odd harmonic.Resistance R7, diode D2, electrolytic capacitor CE1, capacitor C5 provide VCC voltage for chip U1.Resistance R1, resistance R5, resistance R6, resistance R39, resistance R42, resistance R43, capacitor C12 and diode D1 are built into peak absorbing circuit, The voltage stress of field-effect tube Q2 is reduced, EMC interference is improved；Resistance R18, resistance R19, resistance R20 sample field-effect tube Q1's Current signal provides overcurrent protection for PSR circuit；Magnetic induction loop TR1B, resistance R8, resistance R9, resistance R10 and capacitor C8 are constituted Bleeder circuit realizes control of the primary side feedback to secondary side output voltage compared with chip U1 internal reference voltage, and PSR circuit disappears In addition to secondary side feedback element and optocoupler, simplifies circuit and reduce cost.

Further, the secondary side rectification circuit includes resistance R2, resistance R3, resistance R105, resistance R106, resistance R107, resistance R110, capacitor C14, capacitor C35, electrolytic capacitor CE2, electrolytic capacitor CE3, electrolytic capacitor CE9, electrolytic capacitor CE10, diode D10, diode D17, magnetic induction loop TR1C and magnetic induction loop TR1D；

One end of the electrolytic capacitor CE2 respectively with one end of the diode D10, one end of capacitor C14, electrolytic capacitor One end electricity of one end of CE9, one end of electrolytic capacitor CE10, one end of resistance R105, one end of resistance R106 and resistance R107 Connection, the other end of the resistance R107 other end, the electrolytic capacitor with the other end of the resistance R106, resistance R105 respectively The other end of CE10, the other end of electrolytic capacitor CE9, the other end of electrolytic capacitor CE2, one end of electrolytic capacitor CE3, capacitor One end of one end of C35, one end of magnetic induction loop TR1C and magnetic induction loop TR1D is electrically connected and the other end of the resistance R107, The other end of resistance R106, the other end of resistance R105, the other end of electrolytic capacitor CE10, electrolytic capacitor CE9 the other end, electricity Solve the other end of capacitor CE2, one end of electrolytic capacitor CE3, one end of capacitor C35, one end of magnetic induction loop TR1C and magnetic induction line One end of circle TR1D is grounded, and the other end of the magnetic induction loop TR1D is electrically connected with one end of the resistance R110, the electricity Resistance R110 the other end be electrically connected with the anode of the diode D17, the cathode of the diode D17 respectively with the capacitor The electrical connection of the other end of the other end of C35 and electrolytic capacitor CE3, the other end of the magnetic induction loop TR1C respectively with two pole One end electrical connection of the other end and resistance R2 of pipe D10, the other end of resistance R2 is electrically connected with one end of the resistance R3, described The other end of resistance R3 is electrically connected with the other end of the capacitor C14.

Seen from the above description, by the way that magnetic induction loop TR1C, diode D10, electrolytic capacitor CE2, electrolytic capacitor CE9 is arranged Output rectification and filtering, magnetic induction loop TR1D, resistance R110, diode D17 and electrolytic capacitor CE3 are realized with electrolytic capacitor CE10 SEC_VCC voltage (secondary side auxiliary direct current pressure) is provided for secondary side control circuit；Resistance R2, resistance R3 and capacitor C14 are constituted Peak absorbing circuit improves the EMC interference of LED drive circuit to reduce the voltage stress of diode D10.

Further, the Buck circuit includes chip U4, resistance R13, resistance R23, resistance R24, resistance R26, resistance R29, resistance R95, resistance R96, capacitor C2, capacitor C2, capacitor C13, capacitor C16, capacitor C36, electrolytic capacitor CE4, diode D13 and inductance L4；

The chip U4 include the first pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin and 7th pin, the first pin of the chip U4 are electrically connected with one end of one end of the capacitor C13 and resistance R13 respectively, institute State the other end of resistance R13 the 5th pin, one end of resistance R23, one end of capacitor C36 and the resistance with the chip U4 respectively One end of R24 is electrically connected, the other end of the capacitor C36 respectively with the other end of the resistance R23, one end of capacitor C2, core The other end, the electricity of the other end of the electrical connection of the other end of the third pin of piece U4 and capacitor C13 and the capacitor C36, resistance R23 One end, the third pin of chip U4 and the other end of capacitor C13 for holding C2 are grounded, the other end and the core of the capacitor C2 The 6th pin of piece U4 is electrically connected, the second pin of the chip U4 respectively with one end of the resistance R96, diode D13 One end of cathode and inductance L4, the other end of inductance L4 one end with one end of the electrolytic capacitor CE4, capacitor C3 respectively Be electrically connected with one end of resistance R26, the other end of the resistance R26 respectively with one end of the resistance R95 and resistance R29 one End electrical connection, the other end ground connection of the resistance R29, the 7th pin electricity of the other end of the resistance R95 and the chip U4 Connection, the anode of the diode D13 be electrically connected respectively with the other end of the other end of the electrolytic capacitor CE4 and capacitor C3 and The other end of the anode of the diode D13, the other end of electrolytic capacitor CE4 and capacitor C3 is grounded, and the of the chip U4 Four pins are electrically connected with one end of the capacitor C16, and the other end of the capacitor C16 and the other end of the resistance R96 are electrically connected It connects.

As can be seen from the above description, DC voltage VOUT is provided inside chip U4 when the metal-oxide-semiconductor inside chip U4 is connected Metal-oxide-semiconductor and inductance L4 give output offer energy, and electric current is risen by certain slope, and inductance L4 stores energy, inside chip U4 When metal-oxide-semiconductor ends, the inductance L4 pole reversal provides energy, electric current to output by diode D13 and electrolytic capacitor CE4 afterflow Decline by certain slope, inductance L4 releases energy；R26, R29, R95 carry out partial pressure sampling to output voltage, with U4 internal reference Comparison, the inside control U4 MOS switch, realizes constant voltage output.Resistance R13, resistance R23 and capacitor C36 constitute bleeder circuit, with core The comparison of piece U4 internal reference, control chip U4 are enabled；Connection switch between SW+ (switch interface) and GND, when the switch is closed, The 5th pin of chip U4 is lower than internal reference, and chip U4 stops working, and BAT_VCC voltage is (after the decompression conversion of Buck circuit DC voltage) reduce, by emergency switching judging circuit detection, be driven into contingency mode, after switch disconnects, be driven into Whether normal mode, this function manual inspections emergency function are normal.

Further, the battery charger includes chip U5, resistance R34, capacitor C17, capacitor C18, diode D11, diode D12 and insurance resistance F2；

The chip U5 include the first pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin, 7th pin and the 8th pin, the third pin of the first pin of the chip U5 and the chip U5, resistance R34 one end, Third pin, the electricity of the first pin of one end of capacitor C17 and one end electrical connection of capacitor C18 and the chip U5, chip U5 One end, one end of capacitor C17 and one end of capacitor C18 of resistance R34 is grounded, the other end of the resistance R34 and the chip The second pin of U5 is electrically connected, and the other end of the capacitor C17 is electrically connected with the 4th pin of the chip U5, the chip U5 The 5th pin respectively with the other end of the capacitor C18 and insure one end of resistance F2 and be electrically connected, it is described to insure resistance F2 The other end is electrically connected with the 8th pin of the chip U5, the 6th pin of the chip U5 and the cathode of the diode D12 Electrical connection, the 7th pin of the chip U5 is electrically connected with the cathode of the diode D11, the anode of the diode D11 and The anode of the diode D12 is electrically connected.

As can be seen from the above description, chip U6 is charging protection chip for lithium battery, constant current and constant pressure are carried out for single lithium battery Charge Management, as the voltage of the 8th pin (battery voltage detection input terminal) of fruit chip U6 is lower than 2.5V, the small electricity of charger Stream is pre-charged battery；When the voltage of battery voltage detection input terminal is more than 2.5V, charger uses constant current mode pair Battery charging；Charging current is determined by resistance R34；When the voltage of battery voltage detection input terminal is close to battery-end modulation voltage When, charging current is gradually reduced, and chip U6 enters constant-voltage charge mode；When charging current, which is reduced to charging, terminates threshold value, fill Electric end cycle insures resistance F2 for battery charging and provides abnormal protection；Diode D11, diode D12 and LED light provide electricity Pond charging instruction state；When charging normal, the 7th pin of chip U6 is low configuration, and the 6th pin of chip U6 is high group State, LED shine (charging is normal)；Under abnormality, the 7th pin of chip U6 and the 6th pin of chip U6 are high group State, LED do not shine (charging is abnormal).

Further, the emergency Boost circuit include chip U2, resistance R28, resistance R52, resistance R53, resistance R55, Resistance R56, resistance R58, resistance R63, resistance R66, resistance R67, resistance R68, resistance R71, resistance R72, resistance R75, resistance R79, resistance R80, resistance R89, electrolytic capacitor CE5, electrolytic capacitor CE7, diode D16, diode D15, diode D19, two Pole pipe D20, zener diode DZ4, triode Q7, triode Q9, triode Q10, triode Q5, triode Q11, triode Q12 and field-effect tube Q13；

The chip U2 include the first pin, second pin and third pin, the first pin of the chip U2 respectively with One end, the emitter of triode Q12, one end of resistance R79, one end of electrolytic capacitor CE7, triode Q11 of the resistance R89 Emitter, one end of resistance R75, the emitter electrical connection of one end of resistance R80 and triode Q10 and the chip U2 the One pin, one end of resistance R89, the emitter of triode Q12, one end of resistance R79, one end of electrolytic capacitor CE7, triode The emitter of Q11, one end of resistance R75, one end of resistance R80 and triode Q10 emitter be grounded, the chip U2's Third pin is electrically connected with one end of the resistance R72, and the other end of the resistance R72 is another with the resistance R79 respectively The collector electrical connection at end, one end of resistance R67 and triode Q12, the base stage of the triode Q12 respectively with the resistance The anode electrical connection of the other end and zener diode DZ4 of R89, the one of the second pin of the chip U2 and the resistance R66 End electrical connection, the other end of the resistance R66 respectively with one end of the resistance R56, the base stage of triode Q9 and triode Q7 Collector electrical connection, the collector of the triode Q9 respectively with the anode of the diode D20, resistance R68 one end and One end of resistance R80 is electrically connected, the emitter of the triode Q9 respectively with the other end of the resistance R56, triode Q7 Emitter, one end of electrolytic capacitor CE5, the emitter of triode Q5, one end of resistance R53 and field-effect tube Q13 source electrode electricity Connection, the other end of the resistance R53 respectively with the collector of the triode Q10, one end of resistance R28 and field-effect tube The grid of Q13 is electrically connected, and the other end of the resistance R28 is electrically connected with the base stage of the triode Q5, and the resistance R68's is another One end is electrically connected with the base stage of the triode Q10, and the base stage of the triode Q7 is another with the electrolytic capacitor CE5 respectively One end electrical connection at end, one end of resistance R52 and resistance R55, the sun of the other end of the resistance R52 and the diode D15 Pole electrical connection, the cathode of the diode D15 collector and resistance with the other end of the resistance R55, triode Q11 respectively One end of R58 is electrically connected, and the other end of the resistance R58 is electrically connected with the cathode of the diode D19, the diode D19 The other end be electrically connected with the anode of one end of the resistance R63, diode D16, the cathode of the diode D16 respectively with institute The cathode electrical connection of the other end of electrolytic capacitor CE7, the other end of resistance R67 and diode D20 is stated, the resistance R63's is another One end is electrically connected with the other end of one end of the resistance R71 and resistance R75 respectively, the other end of the resistance R71 with it is described The base stage of triode Q11 is electrically connected.

Further, the conventional Boost circuit include chip U8, resistance R33, resistance R35, resistance R37, resistance R38, Resistance R44, resistance R70, resistance R85, resistance R88, resistance R91, capacitor C4, capacitor C6, capacitor C15, capacitor C20, inductance L8 With field-effect tube Q6；

The chip U8 include the first pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin and 7th pin, the first pin of the chip U8 are electrically connected with one end of the capacitor C4, the other end difference of the capacitor C4 It is electrically connected with the third pin of one end of the capacitor C15 and chip U8 and one end of the other end of the capacitor C4, capacitor C15 Be grounded with the third pin of chip U8, the other end of the capacitor C15 respectively with the 4th pin and resistance of the chip U8 One end of R37 is electrically connected, the other end of the resistance R37 respectively with one end of the resistance R35, one end of resistance R38, resistance The source electrode of one end of R44, one end of resistance R70 and field-effect tube Q6 is electrically connected, the other end of the resistance R35 respectively with it is described One end of resistance R33 and the grid electrical connection of field-effect tube Q6, the drain electrode of the field-effect tube Q6 is respectively with the inductance L8's The electrical connection of the anode of one end and diode D5, the other end of the resistance R33 are electrically connected with the second pin of the chip U8, institute The 5th pin for stating chip U8 is electrically connected with one end of one end of the capacitor C20 and resistance R85 respectively, the capacitor C20's The other end is electrically connected with one end of the resistance R91 and one end of the other end of the capacitor C20 and resistance R91 are grounded, institute The other end for stating resistance R91 is electrically connected with one end of the capacitor C6, and the of the other end of the capacitor C6 and the chip U8 The electrical connection of six pins, the 7th pin of the chip U8 are electrically connected with one end of the resistance R88.

As can be seen from the above description, exporting the switch that a PWM square wave controls field-effect tube Q6, secondary side rectification by chip U8 DC voltage VOUT is mentioned by inductance L8, field-effect tube Q6, diode D5, electrolytic capacitor CE6 power device for LED after filtering It is driven for constant current；Resistance R59, resistance R64 and resistance R22 sampled output current realize constant current output；Resistance R38, resistance R44 With the current signal of resistance R70 sampling field-effect tube Q6, overcurrent protection is provided for LED drive circuit.

Further, the emergency switching judging circuit includes resistance R36, resistance R51, resistance R99, resistance R100, electricity Hinder R101, capacitor C21, diode D9, triode Q15 and triode Q16；

One end of the resistance R100 respectively with one end of the resistance R99, one end of resistance R101 and capacitor C21 one End electrical connection, emitter of the other end of the capacitor C21 respectively with the other end of the resistance R101 and triode Q16 are electrically connected It connects and the emitter of the other end of the capacitor C21, the other end of resistance R101 and triode Q16 is grounded, the triode The base stage of Q16 is electrically connected with the other end of the resistance R100, the collector of the triode Q16 respectively with the resistance R36 One end and resistance R51 one end electrical connection, the other end of the resistance R51 is electrically connected with the base stage of the triode Q15, institute The emitter for stating triode Q15 is electrically connected with the other end of the resistance R36, the other end of the resistance R99 and two pole The cathode of pipe D9 is electrically connected.

Please refer to Fig. 1 to Fig. 7, the embodiment of the present invention one are as follows:

Please refer to Fig. 1, a kind of constant current LED drive circuit for integrating emergency lighting, including primary side power-switching circuit, secondary side Rectification circuit 3, Buck circuit 4, battery charger 5, emergency Boost circuit 6, emergency switching judging circuit 7 and routine Boost Circuit 8；

The output end of the primary side power-switching circuit is electrically connected with the input terminal of the secondary side rectification circuit 3, the pair The output end of side rectification circuit 3 is electrically connected with the input terminal of the Buck circuit 4, the output end of the Buck circuit 4 with it is described The input terminal of battery charger 5 is electrically connected, the output end of the battery charger 5 and the emergency switching judging circuit 7 Input terminal electrical connection, it is described emergency switching judging circuit 7 output end and it is described routine Boost circuit 8 input terminal be electrically connected It connects.

The primary side power-switching circuit includes EMC filter rectifier 1 and PSR circuit 2, the EMC filter rectification electricity The output end on road 1 is electrically connected with the input terminal of the PSR circuit 2, the output end of the PSR circuit 2 and the secondary side rectified current The input terminal on road 3 is electrically connected.

Referring to figure 2., the EMC filter rectifier 1 includes rectifier bridge DB1, capacitor C1, capacitor C2, X capacitor CX1, Y Capacitor CY2, Y capacitance CY3, varistor RV1, magnetic induction loop L3, transformer T1, transformer T2, insurance resistance F1 and insert row CON1；

Referring to figure 2., the PSR circuit 2 includes chip U1 (model OB3636), resistance R1 (resistance value 240K Ω), resistance R5 (resistance value is 20 Ω), resistance R6 (resistance value is 20 Ω), resistance R7 (resistance value is 4.7K Ω), resistance R8 (resistance value is 15K Ω), resistance R9 (resistance value is 270K Ω), resistance R10 (resistance value is 2.4K Ω), resistance R11 (resistance value For 470K Ω), resistance R12 (resistance value is 470K Ω), resistance R14 (resistance value is 10K Ω), resistance R15 (resistance value 20 Ω), resistance R16 (resistance value is 100 Ω), resistance R17 (resistance value is 0 Ω), resistance R18 (resistance value is 0.75 Ω), resistance R19 (resistance value is 0.75 Ω), resistance R20 (resistance value is 0.75 Ω), resistance R21 (resistance value is 10K Ω), resistance R39 (electricity Resistance value is 240K Ω), resistance R42 (resistance value is 240K Ω), resistance R43 (resistance value is 240K Ω), (capacitance is capacitor C5 100nF), capacitor C7 (capacitance 22pF), capacitor C8 (capacitance 33pF), capacitor C9 (capacitance 470nF), capacitor (capacitance is by C10 (capacitance 1uF), capacitor C11 (capacitance 22pF), capacitor C12 (capacitance 1nF), Y capacitance CY1 2200pF), electrolytic capacitor CE1 ((capacitance 2.2uF)), diode D1 (model RS2M), diode D2 (model ES1J), diode D4 (model 1N4148WS), magnetic induction loop TR1A (model PQ2615), magnetic induction loop TR1B (model )) and field-effect tube Q2 (model IPD80R1K0CE) PQ2615；

Referring to figure 3., the secondary side rectification circuit 3 includes resistance R2 (resistance value is 47 Ω), resistance R3 (resistance value 47 Ω), resistance R105 (resistance value is 10K Ω), resistance R106 (resistance value is 10K Ω), resistance R107 (resistance value is 10K Ω), Resistance R110 (resistance value is 4.7 Ω), capacitor C14 (capacitance 100pF), capacitor C35 (capacitance 100nF), electrolysis electricity Hold CE2 (capacitance 560uF), electrolytic capacitor CE3 (capacitance 470uF), electrolytic capacitor CE9 (capacitance 560uF), electricity Solve capacitor CE10 (capacitance 560uF), diode D10 (model MBR20200CT), diode D17 (model ES1J), Magnetic induction loop TR1C (model PQ2615) and magnetic induction loop TR1D (model PQ2615)；

Referring to figure 4., the Buck circuit 4 includes chip U4 (model MP9942), resistance R13 (resistance value 365K Ω), resistance R23 (resistance value is 27K Ω), resistance R24 (resistance value is 27K Ω), resistance R26 (resistance value is 51K Ω), resistance R29 (resistance value is 10K Ω), resistance R95 (resistance value is 51K Ω), resistance R96 (resistance value is 20 Ω), capacitor C2 (capacitance For 100nF), capacitor C3 (capacitance 100nF), capacitor C13 (capacitance 100nF), capacitor C16 (capacitance 100nF), Capacitor C36 (capacitance 100nF), electrolytic capacitor CE4 (capacitance 100uF), diode D13 (model SS24A) and electricity Feel L4 (sensibility reciprocal value is 10uH)；

Referring to figure 5., the battery charger 5 includes chip U5 (model CN3058), (resistance value is resistance R34 4.22K Ω), capacitor C17 (capacitance 1uF), capacitor C18 (capacitance 4.7uF), diode D11 (model 1N4148WS), diode D12 (model 1N4148WS) and insurance resistance F2 (model 2010T, current value 2A, voltage value Value is 250V)；

Fig. 6 is please referred to, the emergency Boost circuit 6 includes chip U2 (model TLVH431AQDBZR), resistance R28 (resistance value is 1K Ω), resistance R52 (resistance value is 330 Ω), resistance R53 (resistance value is 2.7K Ω), resistance R55 (resistance value For 100K Ω), resistance R56 (resistance value is 5.1K Ω), resistance R58 (resistance value is 100K Ω), resistance R63, (resistance value is 5.1K Ω), resistance R66 (resistance value is 1K Ω), resistance R67 (resistance value is 3.9K Ω), resistance R68 (resistance value is 1K Ω), Resistance R71 (resistance value is 5.1K Ω), resistance R72 (resistance value is 1K Ω), resistance R75 (resistance value is 5.1K Ω), resistance R79 (resistance value is 5.1K Ω), resistance R80 (resistance value is 2.7K Ω), resistance R89 (resistance value is 2.7K Ω), electrolytic capacitor CE5 (capacitance 47uF), electrolytic capacitor CE7 (capacitance 220uF), diode D16 (model BAS16), diode D15 (type Number be BAS16), diode D19 (model BAS16), diode D20 (model BAS16), zener diode DZ4 (model BZT52C5V6), triode Q7 (model BC847B), triode Q9 (model BC857B), triode Q10 (model BC847B), triode Q5 (model BC857B), triode Q11 (model BC847B), triode Q12 (model ) and field-effect tube Q13 (model DMP1045U) BC847B；

Please refer to Fig. 7, the routine Boost circuit 8 includes that (resistance value is by chip U8 (model OB3350), resistance R33 10 Ω), resistance R35 (resistance value is 10K Ω), resistance R37 (resistance value is 1K Ω), resistance R38 (resistance value be 0.39 Ω), electricity Hinder R44 (resistance value is 0.39 Ω), resistance R70 (resistance value is 0.39 Ω), resistance R85 (resistance value is 100 Ω), resistance R88 (capacitance is by (resistance value is 10K Ω), resistance R91 (resistance value is 24K Ω), capacitor C4 (capacitance 100nF), capacitor C6 33nF), capacitor C15 (capacitance 1nF), capacitor C20 (capacitance 1nF), inductance L8 (inductance 33uH) and field-effect Pipe Q6 (model AOD4286)；

Fig. 7 is please referred to, the emergency switching judging circuit 7 includes resistance R36 (resistance value is 27K Ω), resistance R51 (electricity Resistance value is 10K Ω), resistance R99 (resistance value is 39K Ω), resistance R100 (resistance value is 1K Ω), (resistance value is resistance R101 10K Ω), capacitor C21 (capacitance 4.7uF), diode D9 (model 1N4148WS), triode Q15 (model ) and triode Q16 (model BC847B) BC857B；

Referring to figure 2. to Fig. 7, the working principle of the above-mentioned constant current LED drive circuit for integrating emergency lighting are as follows:

Insurance resistance F1 provides abnormal protection for power supply, and X capacitor CX1 is the filtering of EMC differential mode, by the way that magnetic induction loop is arranged L3, capacitor C1 and capacitor C2 constitute EMC differential mode π type filter circuit, to filter out DM EMI；Y capacitance CY1, Y capacitance CY2, become Depressor T1 and transformer T2 constitutes EMC common mode filtering circuit, interferes to filtering common mode, and the alternating current of input passes through rectifier bridge DB1 is converted into DC voltage.

The switch that a PWM square wave controls field-effect tube Q2 is exported by control chip U1, when field-effect tube Q2 conducting, Electric current rises according to certain slope, and transformer TR1 stores energy；After field-effect tube Q2 shutdown, transformer TR1 is to secondary side and auxiliary Winding is helped to provide energy, while chip U1 improves active power, it is humorous to reduce harmful odd times by constant conduction control program Wave.Resistance R7, diode D2, electrolytic capacitor CE1, capacitor C5 provide VCC voltage for chip U1.Resistance R1, resistance R5, resistance R6, resistance R39, resistance R42, resistance R43, capacitor C12 and diode D1 are built into peak absorbing circuit, reduce field-effect tube Q2 Voltage stress, improve EMC interference；The current signal of resistance R18, resistance R19, resistance R20 sampling field-effect tube Q1, are PSR Circuit 2 provides overcurrent protection；Magnetic induction loop TR1B, resistance R8, resistance R9, resistance R10 and capacitor C8 constitute bleeder circuit, with core Piece U1 internal reference voltage compares, and realizes control of the primary side feedback to secondary side output voltage, and PSR circuit 2 eliminates secondary side feedback Element and optocoupler simplify circuit and reduce cost.

Pass through setting magnetic induction loop TR1C, diode D10, electrolytic capacitor CE2, electrolytic capacitor CE9 and electrolytic capacitor CE10 Realize output rectification and filtering, magnetic induction loop TR1D, resistance R110, diode D17 and electrolytic capacitor CE3 are secondary side control circuit SEC_VCC voltage is provided；Resistance R2, resistance R3 and capacitor C14 constitute peak absorbing circuit, to reduce the electricity of diode D10 Compression improves the EMC interference of LED drive circuit.

Inside chip U4 metal-oxide-semiconductor conducting when, DC voltage VOUT provide chip U4 inside metal-oxide-semiconductor and inductance L4 to Output provides energy, and electric current is risen by certain slope, and inductance L4 stores energy, when the metal-oxide-semiconductor inside chip U4 ends, inductance The L4 pole reversal provides energy to output by diode D13 and electrolytic capacitor CE4 afterflow, and electric current is declined by certain slope, electricity Sense L4 releases energy；R26, R29, R95 carry out partial pressure sampling to output voltage, compare with U4 internal reference, MOS inside control U4 Switch realizes constant voltage output.Resistance R13, resistance R23 and capacitor C36 constitute bleeder circuit, compare with chip U4 internal reference, It is enabled to control chip U4；Connection switch between SW+ and GND, when the switch is closed, the 5th pin of chip U4 are lower than internal base Standard, chip U4 stop working, and BAT_VCC is reduced, and are detected by emergency switching judging circuit 7, are driven into contingency mode, switched After disconnection, it is driven into normal mode, whether this function manual inspections emergency function is normal.

Chip U6 is charging protection chip for lithium battery, constant current and constant-voltage charge management is carried out for single lithium battery, if core The voltage of the 8th pin (battery voltage detection input terminal) of piece U6 is lower than 2.5V, and charger carries out preliminary filling to battery with low current Electricity；When the voltage of battery voltage detection input terminal is more than 2.5V, charger charges to battery using constant current mode；Charging current It is determined by resistance R34；When the voltage of battery voltage detection input terminal is close to battery-end modulation voltage, charging current gradually subtracts Small, chip U6 enters constant-voltage charge mode；When charging current, which is reduced to charging, terminates threshold value, charge cycle terminates, insurance electricity Resistance F2 provides abnormal protection for battery charging；Diode D11, diode D12 and LED light provide battery charging instruction state；When When charging normal, the 7th pin of chip U6 is low configuration, and the 6th pin of chip U6 is high configuration, and LED shines, and (charging is just Often)；Under abnormality, the 7th pin of chip U6 and the 6th pin of chip U6 are high configuration, and LED, which does not shine, (to charge It is abnormal).

Under contingency mode, field-effect tube Q13 and triode Q5 conducting export a PWM square wave controlling filed by chip U7 The switch of effect pipe Q3, when field-effect tube Q3 conducting, inductance L6 electric current rises according to certain slope, and inductance L6 stores energy； When field-effect tube Q3 shutdown, lithium battery passes through inductance L6, field-effect tube Q3, diode D18 and electrolytic capacitor CE6 power device Part provides Constant-power drive for LED light, and inductance L6 electric current declines according to certain slope, and inductance L6 releases energy.Resistance R59, electricity Hinder R64 and resistance R22 and input current be converted into sampled voltage, through amplifying circuit (by resistance R74, resistance R69, resistance R81 and Chip U6 constitute) amplification after, the FB foot of chip U7 with internal reference compared with, control field-effect tube Q3 switch, realization invariable power it is defeated Out.Field-effect tube U3 is multiplication of voltage chip, voltage-multiplying circuit is built into diode D8, capacitor C31 and electrolytic capacitor CE8, by battery Voltage multiplication of voltage, the VIN foot power supply of VCC foot and chip U7 to chip U6.Resistance R61, resistance R65 and resistance R84 sampled field effect Should pipe Q3 current signal, provide overcurrent protection for LED drive circuit.After resistance R54 and resistance R62 is divided output voltage It is supplied to zener diode DZ4, resistance R89 and triode Q12 voltage, when output voltage is more than certain value, triode Q12 conducting In a saturated state, the second pin of chip U2 is in high potential, and triode Q9, triode Q10 and triode Q5 is caused to be in Off state, field-effect tube Q13 are disconnected, and emergency Boost circuit 6 stops working, and realize the overvoltage protection of LED drive circuit.

Under normal mode, the switch that a PWM square wave controls field-effect tube Q6, secondary side rectifying and wave-filtering are exported by chip U8 DC voltage VOUT provides perseverance by inductance L8, field-effect tube Q6, diode D5, electrolytic capacitor CE6 power device for LED afterwards Stream driving；Resistance R59, resistance R64 and resistance R22 sampled output current realize constant current output；Resistance R38, resistance R44 and electricity The current signal for hindering R70 sampling field-effect tube Q6, provides overcurrent protection for LED drive circuit.Resistance R108, resistance R109 and electricity It hinders R88 and detects output voltage, provide overvoltage protection for LED drive circuit.

Under normal condition (when mains-supplied is normal), PSR circuit 2 is worked normally, and BAT_VCC keeps normal voltage, BAT_ VCC is divided by resistance R63, resistance R75 and resistance R71, base stage and emitter power supply to triode Q11, triode Q11 work Make in saturation region, since triode Q11 is connected, battery BAT passes through electrolytic capacitor CE5, diode D15, resistance R25, resistance R55 Make triode Q7 work in saturation region with triode Q11, the base stage and emitter voltage of triode Q9 is led by triode Q7 short circuit Cause triode Q9, triode Q10 and triode Q5 work in cut-off region, triode Q13 is turned off, and chip U3 is mentioned without input voltage For the VCC foot of chip U6 and the VIN foot unpowered of chip U7, two chips do not work, and LED drive circuit stops working；Together When BAT_VCC keep normal voltage, triode Q15 and triode Q16 work in saturation region, the first pin (VIN of chip U8 Foot) it powers normally, LED drive circuit works normally, and driving is by LED drive circuit under normal mode, this mode LED power supply.

Under abnormality when power-off (mains-supplied is under-voltage or), PSR circuit 2 stops working, BAT_VCC without output, When BAT_VCC is without output, due to the presence of electrolytic capacitor CE7, electrolytic capacitor CE7 both end voltage is constant, passes through resistance R67, electricity It hinders R79 and resistance R72 electric resistance partial pressure is higher than the internal reference of chip U2, the second pin of chip U2 is caused to maintain low potential； In addition when BAT_VCC is without output, in cut-off region, battery BAT passes through resistance R56, resistance for triode Q11 and triode Q7 work R66 and chip U2 powers to the base stage and emitter of triode Q9, and triode Q9 works in saturation region；Battery BAT passes through three poles Pipe Q9, resistance R68 and resistance R80 power to triode Q10 base stage and emitter, and triode Q10 works in saturation region；Triode Q5, resistance R28 and triode Q10 line conduction, triode Q5 work in saturation region；In addition triode Q10 is connected field-effect The grid of pipe Q13 drags down, and field-effect tube Q13 work is on state, after battery passes through chip U3 voltage-multiplying circuit multiplication of voltage, gives chip The VIN foot power supply of the VCC foot and U7 of U6, LED drive circuit works normally, while BAT_VCC is without output, triode Q15 and three Pole pipe Q16 works in cut-off region；The first pin (VIN foot) unpowered of chip U8, LED drive circuit do not work, and driving is in Contingency mode, under this mode, battery is that LED powers by emergency LED driving circuit.

Current city's electricity condition is judged by emergency switching judging circuit 7, carries out emergency rating and conventional sense switching.

The constant current LED drive circuit for integrating emergency lighting of this programme design has several advantages that

1, the circuit is by setting PSR circuit 2, in fully loaded output, it can be achieved that the driving circuit of high PF value and low harmony wave, And secondary side feedback element and optocoupler are eliminated, circuit is simplified and reduces cost；

2, the circuit has the multi-protective functions such as overvoltage, overcurrent and cell charge protection, is capable of providing emergency LED driving Reliability；

3, emergency conversion decision circuitry is constructed using logical device, circuit is simple and optimizes cost；

4, circuit integrated normal mode and the emergency lighting mode, on lamp assembled, the circuit section save space, this collection Bigger freedom is provided for Design of Luminaires person at the space requirement of driving appropriateness, and solves wiring challenge；

5, the circuit uses emergency Boost circuit 6, for Constant-power drive, it can be achieved that all types of LED loads uses, side Just client uses reduction driving model.

In conclusion a kind of constant current LED drive circuit for integrating emergency lighting provided by the invention, passes through setting primary side electricity Power-switching circuit will carry out correction output to power factor after the alternating voltage filter rectification of input, through secondary side current rectifying and wave filtering circuit It is converted into DC voltage, DC voltage is powered to two parts respectively: first part reduces voltage by Buck circuit, is battery Charging circuit power supply, battery charger carry out constant current, constant-voltage charge to battery；Second part in normal mode, by normal Rule Boost circuit provides constant current driving for LED, and when entering under emergency rating, lithium battery is by emergency Boost circuit to LED light Constant-power drive is provided；Switching judging circuit of meeting an urgent need detection current state realizes the driving of normal mode constant-current LED and emergency lighting The switching of mode.

The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, similarly include In scope of patent protection of the invention.

Claims

1. a kind of constant current LED drive circuit for integrating emergency lighting, which is characterized in that including primary side power-switching circuit, secondary side Rectification circuit, Buck circuit, battery charger, emergency Boost circuit, emergency switching judging circuit and conventional Boost circuit；

The output end of the primary side power-switching circuit is electrically connected with the input terminal of the secondary side rectification circuit, pair side rectification The output end of circuit is electrically connected with the input terminal of the Buck circuit, the output end of the Buck circuit and battery charging electricity The input terminal on road is electrically connected, and the output end of the battery charger and the input terminal of the emergency switching judging circuit are electrically connected It connects, the output end of the emergency switching judging circuit is electrically connected with the input terminal of the conventional Boost circuit.

2. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that the primary side electricity Power-switching circuit includes EMC filter rectifier and PSR circuit, and the output end of the EMC filter rectifier and the PSR are electric The input terminal on road is electrically connected, and the output end of the PSR circuit is electrically connected with the input terminal of the secondary side rectification circuit.

3. the constant current LED drive circuit according to claim 2 for integrating emergency lighting, which is characterized in that the EMC filtering Rectification circuit includes rectifier bridge DB1, capacitor C1, capacitor C2, X capacitor CX1, Y capacitance CY2, Y capacitance CY3, varistor RV1, magnetic Feel coil L3, transformer T1, transformer T2, insurance resistance F1 and insert row CON1；

The insert row CON1 includes the first pin, second pin and third pin, the first end and the change of the rectifier bridge DB1 One end of the armature winding of depressor T2 is electrically connected, the other end of the armature winding of the transformer T2 respectively with the Y capacitance CY2 One end, X capacitor CX1 one end and transformer T1 armature winding one end electrical connection, the armature winding of the transformer T1 The other end respectively with one end of the varistor RV1 and insure one end of resistance F1 and be electrically connected, it is described to insure resistance F1 The other end is electrically connected with the second pin of the insert row CON1, the first pin of the insert row CON1 respectively with the varistor One end of the secondary windings of the other end and transformer T1 of RV1 is electrically connected, the other end point of the secondary windings of the transformer T1 It is not electrically connected with one end of the secondary windings of the other end of the X capacitor CX1, one end of Y capacitance CY1 and transformer T2, it is described The other end of the secondary windings of transformer T2 is electrically connected with the second end of the rectifier bridge DB1, the other end of the Y capacitance CY2 It is electrically connected respectively with the third pin of the other end of the Y capacitance CY1 and insert row CON1, the third end point of the rectifier bridge DB1 It is not electrically connected with one end of one end of the capacitor C1 and magnetic induction loop L3, the other end and the capacitor of the magnetic induction loop L3 One end of C2 is electrically connected, the other end of the capacitor C2 the 4th end with the other end of the capacitor C1 and rectifier bridge DB1 respectively 4th end of electrical connection and the other end of the capacitor C2, the other end of capacitor C1 and rectifier bridge DB1 is grounded.

4. the constant current LED drive circuit according to claim 2 for integrating emergency lighting, which is characterized in that the PSR circuit Including chip U1, resistance R1, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R12, Resistance R14, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, resistance R20, resistance R21, resistance R39, resistance R42, resistance R43, capacitor C5, capacitor C7, capacitor C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, Y capacitance CY1, electrolysis Capacitor CE1, diode D1, diode D2, diode D4, magnetic induction loop TR1A, magnetic induction loop TR1B and field-effect tube Q2；

The chip U1 includes the first pin, second pin, third pin, the 4th pin, the 5th pin and the 6th pin, described One end electricity of the first pin of chip U1 and one end of the resistance R8, one end of resistance R9, one end of resistance R10 and capacitor C8 Connection, the second pin of the chip U2 respectively with one end of the capacitor C5, one end of resistance R9, resistance R10 one end and The other end of capacitor C8 is electrically connected and the second pin of the chip U1, one end of capacitor C5, one end of resistance R9, resistance R10 One end and the other end of capacitor C8 be grounded, the third pin of the chip U1 respectively with the other end of the capacitor C5, two One end of the cathode of pole pipe D2, one end of electrolytic capacitor CE1 and resistance R12 is electrically connected, the other end of the resistance R12 with it is described One end of resistance R11 is electrically connected, the other end of the resistance R11 respectively with one end of the resistance R1, resistance R42 one end, One end of one end of capacitor C12, one end of Y capacitance CY1 and magnetic induction loop TR1A is electrically connected, another termination of the Y capacitance CY1 Ground, the other end of the resistance R1 are electric with one end of the other end of the resistance R42, one end of resistance R43 and resistance R39 respectively Connection, the other end of the resistance R43 and the other end of the resistance R39, the other end of capacitor C12, resistance R5 one end and One end of resistance R6 is electrically connected, and the other end of the resistance R5 is electrically connected with the other end of the resistance R6 and the cathode of diode D1 It connects, the anode of the diode D1 source electrode and capacitor C7 with the other end of the magnetic induction loop TR1A, field-effect tube Q2 respectively One end electrical connection, the field-effect tube Q2 drain electrode respectively with the other end of the capacitor C7, one end of resistance R19, resistance One end electrical connection of one end of R20, one end of resistance R18, one end of resistance R17 and resistance R21, the resistance R20's is another End is electrically connected respectively with the other end of the other end of the resistance R19 and resistance R18 and the other end, the resistance of the resistance R20 The other end of R19 and the other end of resistance R18 are grounded, the grid of the field-effect tube Q2 respectively with the resistance R21 one One end electrical connection at end, the anode of diode D4 and resistance R16, the cathode of the diode D4 is respectively with the resistance R16's The electrical connection of one end of the other end and resistance R15, the other end of the resistance R15 are electrically connected with the 4th pin of the chip U1, The 5th pin of the chip U1 is electrically connected with the other end of one end of the capacitor C11 and resistance R17 respectively, the chip U1 The 6th pin be electrically connected respectively with one end of one end of the resistance R14 and capacitor C9, the other end of capacitor C9 difference Be electrically connected with the other end of the other end of the capacitor C10 and capacitor C11 and the other end of the capacitor C9, capacitor C10 it is another The other end of one end and capacitor C11 are grounded, the other end of the resistance R8 respectively with one end of the resistance R7 and magnetic induction line Enclose RT1B one end electrical connection, the other end of the magnetic induction loop RT1B be electrically connected with the other end of the electrolytic capacitor CE1 and The other end of the magnetic induction loop RT1B and the other end of electrolytic capacitor CE1 are grounded, the other end of the resistance R7 with it is described The anode of diode D2 is electrically connected.

5. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that the pair side is whole Current circuit include resistance R2, resistance R3, resistance R105, resistance R106, resistance R107, resistance R110, capacitor C14, capacitor C35, Electrolytic capacitor CE2, electrolytic capacitor CE3, electrolytic capacitor CE9, electrolytic capacitor CE10, diode D10, diode D17, magnetic induction loop TR1C and magnetic induction loop TR1D；

One end of the electrolytic capacitor CE2 respectively with one end of the diode D10, one end of capacitor C14, electrolytic capacitor CE9 One end, one end of electrolytic capacitor CE10, one end of resistance R105, one end of resistance R106 and resistance R107 one end be electrically connected It connects, the other end of the resistance R107 other end, the electrolytic capacitor with the other end of the resistance R106, resistance R105 respectively The other end of CE10, the other end of electrolytic capacitor CE9, the other end of electrolytic capacitor CE2, one end of electrolytic capacitor CE3, capacitor One end of one end of C35, one end of magnetic induction loop TR1C and magnetic induction loop TR1D is electrically connected and the other end of the resistance R107, The other end of resistance R106, the other end of resistance R105, the other end of electrolytic capacitor CE10, electrolytic capacitor CE9 the other end, electricity Solve the other end of capacitor CE2, one end of electrolytic capacitor CE3, one end of capacitor C35, one end of magnetic induction loop TR1C and magnetic induction line One end of circle TR1D is grounded, and the other end of the magnetic induction loop TR1D is electrically connected with one end of the resistance R110, the electricity Resistance R110 the other end be electrically connected with the anode of the diode D17, the cathode of the diode D17 respectively with the capacitor The electrical connection of the other end of the other end of C35 and electrolytic capacitor CE3, the other end of the magnetic induction loop TR1C respectively with two pole One end electrical connection of the other end and resistance R2 of pipe D10, the other end of resistance R2 is electrically connected with one end of the resistance R3, described The other end of resistance R3 is electrically connected with the other end of the capacitor C14.

6. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that the Buck electricity Road include chip U4, resistance R13, resistance R23, resistance R24, resistance R26, resistance R29, resistance R95, resistance R96, capacitor C2, Capacitor C2, capacitor C13, capacitor C16, capacitor C36, electrolytic capacitor CE4, diode D13 and inductance L4；

The chip U4 includes the first pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin and the 7th Pin, the first pin of the chip U4 are electrically connected with one end of one end of the capacitor C13 and resistance R13 respectively, the electricity Hinder the other end the 5th pin, one end of resistance R23, one end of capacitor C36 and the resistance R24 with the chip U4 respectively of R13 One end electrical connection, the other end of the capacitor C36 respectively with the other end of the resistance R23, one end of capacitor C2, chip U4 Third pin and capacitor C13 the other end electrical connection and the other end of the capacitor C36, the other end of resistance R23, capacitor C2 One end, the third pin of chip U4 and the other end of capacitor C13 be grounded, the other end of the capacitor C2 and the chip U4 The electrical connection of the 6th pin, the second pin of the chip U4 cathode with one end of the resistance R96, diode D13 respectively With one end of inductance L4, the other end of the inductance L4 respectively with one end of the electrolytic capacitor CE4, one end of capacitor C3 and electricity One end electrical connection of R26 is hindered, the other end of the resistance R26 is electric with one end of the resistance R95 and one end of resistance R29 respectively Connection, the other end ground connection of the resistance R29, the other end of the resistance R95 are electrically connected with the 7th pin of the chip U4, The anode of the diode D13 is electrically connected with the other end of the other end of the electrolytic capacitor CE4 and capacitor C3 and described respectively The other end of the anode of diode D13, the other end of electrolytic capacitor CE4 and capacitor C3 is grounded, and the 4th of the chip U4 draws Foot is electrically connected with one end of the capacitor C16, and the other end of the capacitor C16 is electrically connected with the other end of the resistance R96.

7. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that the battery fills Circuit includes chip U5, resistance R34, capacitor C17, capacitor C18, diode D11, diode D12 and insurance resistance F2；

The chip U5 includes the first pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin, the 7th The third pin of pin and the 8th pin, the first pin of the chip U5 and the chip U5, one end of resistance R34, capacitor The first pin, the third pin of chip U5, resistance R34 of one end of C17 and one end electrical connection of capacitor C18 and the chip U5 One end, one end of capacitor C17 and one end of capacitor C18 be grounded, the of the other end of the resistance R34 and the chip U5 The electrical connection of two pins, the other end of the capacitor C17 are electrically connected with the 4th pin of the chip U5, and the 5th of the chip U5 the Pin is electrically connected with one end of the other end of the capacitor C18 and insurance resistance F2 respectively, the other end of the insurance resistance F2 It being electrically connected with the 8th pin of the chip U5, the 6th pin of the chip U5 is electrically connected with the cathode of the diode D12, The 7th pin of the chip U5 is electrically connected with the cathode of the diode D11, the anode of the diode D11 and two pole The anode of pipe D12 is electrically connected.

8. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that the emergency Boost circuit include chip U2, resistance R28, resistance R52, resistance R53, resistance R55, resistance R56, resistance R58, resistance R63, Resistance R66, resistance R67, resistance R68, resistance R71, resistance R72, resistance R75, resistance R79, resistance R80, resistance R89, electrolysis Capacitor CE5, electrolytic capacitor CE7, diode D16, diode D15, diode D19, diode D20, zener diode DZ4, three Pole pipe Q7, triode Q9, triode Q10, triode Q5, triode Q11, triode Q12 and field-effect tube Q13；

The chip U2 include the first pin, second pin and third pin, the first pin of the chip U2 respectively with it is described One end of resistance R89, the emitter of triode Q12, one end of resistance R79, one end of electrolytic capacitor CE7, triode Q11 hair Emitter-base bandgap grading, one end of resistance R75, the emitter electrical connection of one end of resistance R80 and triode Q10 and the chip U2 first draw Foot, one end of resistance R89, the emitter of triode Q12, one end of resistance R79, one end of electrolytic capacitor CE7, triode Q11 Emitter, one end of resistance R75, one end of resistance R80 and triode Q10 emitter be grounded, the of the chip U2 Three pins are electrically connected with one end of the resistance R72, the other end of the resistance R72 respectively with the other end of the resistance R79, One end of resistance R67 and the collector electrical connection of triode Q12, the base stage of the triode Q12 is respectively with the resistance R89's The electrical connection of the anode of the other end and zener diode DZ4, the second pin of the chip U2 and one end of the resistance R66 are electrically connected It connects, the other end of the resistance R66 current collection with one end of the resistance R56, the base stage of triode Q9 and triode Q7 respectively Pole electrical connection, the collector of the triode Q9 respectively with the anode of the diode D20, one end of resistance R68 and resistance R80 One end electrical connection, the emitter of the triode Q9 respectively with the other end of the resistance R56, triode Q7 emitter, The source electrode electrical connection of one end of electrolytic capacitor CE5, the emitter of triode Q5, one end of resistance R53 and field-effect tube Q13, institute State the other end of the resistance R53 grid with the collector of the triode Q10, one end of resistance R28 and field-effect tube Q13 respectively Electrical connection, the other end of the resistance R28 are electrically connected with the base stage of the triode Q5, the other end of the resistance R68 and institute State the base stage electrical connection of triode Q10, the base stage of the triode Q7 other end, the resistance with the electrolytic capacitor CE5 respectively One end of R52 and one end electrical connection of resistance R55, the other end of the resistance R52 and the anode of the diode D15 are electrically connected Connect, the cathode of the diode D15 respectively with the other end of the resistance R55, the collector of triode Q11 and resistance R58 One end electrical connection, the other end of the resistance R58 are electrically connected with the cathode of the diode D19, and the diode D19's is another End be electrically connected with the anode of one end of the resistance R63, diode D16, the cathode of the diode D16 respectively with the electrolysis The cathode of the other end of capacitor CE7, the other end of resistance R67 and diode D20 is electrically connected, the other end point of the resistance R63 It is not electrically connected with the other end of one end of the resistance R71 and resistance R75, the other end and the triode of the resistance R71 The base stage of Q11 is electrically connected.

9. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that the routine Boost circuit include chip U8, resistance R33, resistance R35, resistance R37, resistance R38, resistance R44, resistance R70, resistance R85, Resistance R88, resistance R91, capacitor C4, capacitor C6, capacitor C15, capacitor C20, inductance L8 and field-effect tube Q6；

The chip U8 includes the first pin, second pin, third pin, the 4th pin, the 5th pin, the 6th pin and the 7th Pin, the first pin of the chip U8 are electrically connected with one end of the capacitor C4, the other end of the capacitor C4 respectively with institute State one end of capacitor C15 and the third pin electrical connection of chip U8 and the other end of the capacitor C4, one end of capacitor C15 and core The third pin of piece U8 is grounded, the other end of the capacitor C15 respectively with the 4th pin of the chip U8 and resistance R37 One end electrical connection, the other end of the resistance R37 respectively with one end of the resistance R35, one end of resistance R38, resistance R44 The source electrode of one end, one end of resistance R70 and field-effect tube Q6 is electrically connected, the other end of the resistance R35 respectively with the resistance One end of R33 and the grid electrical connection of field-effect tube Q6, the one end with the inductance L8 respectively that drains of the field-effect tube Q6 It is electrically connected with the anode of diode D5, the other end of the resistance R33 is electrically connected with the second pin of the chip U8, the core The 5th pin of piece U8 is electrically connected with one end of one end of the capacitor C20 and resistance R85 respectively, and the capacitor C20's is another End is electrically connected with one end of the resistance R91 and one end of the other end of the capacitor C20 and resistance R91 are grounded, the electricity The other end of resistance R91 is electrically connected with one end of the capacitor C6, and the other end of the capacitor C6 draws with the 6th of the chip U8 Foot electrical connection, the 7th pin of the chip U8 are electrically connected with one end of the resistance R88.

10. the constant current LED drive circuit according to claim 1 for integrating emergency lighting, which is characterized in that described to answer in a hurry Changing decision circuitry includes resistance R36, resistance R51, resistance R99, resistance R100, resistance R101, capacitor C21, diode D9, three poles Pipe Q15 and triode Q16；

One end of the resistance R100 is electric with one end of one end of the resistance R99, one end of resistance R101 and capacitor C21 respectively Connection, the other end of the capacitor C21 be electrically connected respectively with the emitter of the other end of the resistance R101 and triode Q16 and The emitter of the other end of the capacitor C21, the other end of resistance R101 and triode Q16 is grounded, the triode Q16's Base stage is electrically connected with the other end of the resistance R100, the collector of triode Q16 one end with the resistance R36 respectively It is electrically connected with one end of resistance R51, the other end of the resistance R51 is electrically connected with the base stage of the triode Q15, three pole The emitter of pipe Q15 is electrically connected with the other end of the resistance R36, and the other end of the resistance R99 is with the diode D9's Cathode electrical connection.