A LED constant power drive circuit with self-checking and integrated intelligent charging

Abstract

The present invention relates to the technical field of LED driving circuits, and in particular to an LED constant power driving circuit with self-checking integrated with intelligent charging. A primary power conversion circuit is set to filter and rectify the input AC voltage, and then the power factor is corrected and output, and the DC voltage is converted into a DC voltage through a secondary rectification and filtering circuit. The DC voltage is used to power a battery charging circuit, and the battery charging circuit charges the battery with a constant current; when entering an emergency state, the lithium battery provides a constant power drive to the LED lamp through an emergency Boost circuit; the control circuit detects the mains power state to achieve switching between normal lighting mode and emergency lighting mode, and the control circuit controls the charging of the battery and detects the battery state in real time. In addition, the controller will regularly perform scheduled weekly inspections and annual inspections to detect whether there are abnormalities in emergency products; the outside can read the current state of the emergency controller through a DALI communication circuit or control the product to perform mode switching, parameter modification and other functions.

Description

Technical Field

[0001] The present invention relates to the technical field of LED drive circuits, and in particular to an LED constant power drive circuit with self-checking function integrated with intelligent charging. Background Art

[0002] Emergency lighting is used when the power supply of normal lighting fails. Currently, emergency lighting uses independent charging chips to charge the battery, and battery abnormalities cannot be monitored in real time. If battery abnormalities cannot be detected, there will be greater risks. In addition, ordinary emergency lighting uses manual inspections, and the labor cost is getting higher and higher, and there is a risk of manual inspection omissions. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an LED constant power driving circuit with self-checking integrated with intelligent charging.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] An LED constant power driving circuit with self-checking integrated with intelligent charging, comprising a primary power conversion circuit, a secondary rectification circuit, a battery charging circuit, an emergency boost circuit, a control circuit and a DALI communication circuit;

[0006] The input end of the primary power conversion circuit is connected to external alternating current, the output end of the primary power conversion circuit is electrically connected to the input end of the secondary rectifier circuit, the output end of the secondary rectifier circuit is electrically connected to the input end of the battery charging circuit, the output end of the battery charging circuit is electrically connected to the input end of the emergency Boost circuit, and the output end of the emergency Boost circuit is electrically connected to an external LED;

[0007] The control circuit is electrically connected to a detection terminal for detecting whether external AC power is off, a battery charging circuit, an emergency Boost circuit and a DALI communication circuit respectively.

[0008] The beneficial effects of the present invention are:

[0009] By setting up a primary power conversion circuit, the input AC voltage is filtered and rectified, and the power factor is corrected and output. It is converted into a DC voltage through a secondary rectification and filtering circuit. The DC voltage supplies power to the battery charging circuit, and the battery charging circuit charges the battery with a constant current. When entering an emergency state, the lithium battery provides constant power drive to the LED lamp through the emergency Boost circuit. The control circuit detects the AC power status to achieve switching between normal lighting mode and emergency lighting mode. In addition, the control circuit controls the charging of the battery and detects the battery status in real time. In addition, the controller will regularly perform weekly and annual inspections to detect whether there are any abnormalities in the emergency product. The external DALI communication circuit can read the current status of the emergency controller or control the product to perform mode switching, parameter modification and other functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural block diagram of an LED constant power driving circuit with self-checking integrated with intelligent charging of the present invention;

[0011] Figure 2 It is a circuit connection diagram of a primary power conversion circuit of an LED constant power drive circuit with integrated intelligent charging and self-checking of the present invention;

[0012] Figure 3 A circuit connection diagram of a secondary side rectifier circuit and a battery charging circuit of an LED constant power drive circuit with self-checking and integrated intelligent charging according to the present invention;

[0013] Figure 4 It is a circuit connection diagram of an emergency Boost circuit of an LED constant power drive circuit integrated with intelligent charging and self-checking of the present invention;

[0014] Figure 5 A circuit connection diagram of a control circuit of an LED constant power drive circuit with integrated intelligent charging and self-checking according to the present invention;

[0015] Figure 6 A circuit connection diagram of a DALI communication circuit of an LED constant power drive circuit with self-checking and integrated intelligent charging according to the present invention;

[0016] Description of labels:

[0017] 1. Primary power conversion circuit; 2. Secondary rectification circuit; 3. Battery charging circuit; 4. Emergency Boost circuit; 5. Control circuit; 6. DALI communication circuit; 7. LED. DETAILED DESCRIPTION

[0018] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0019] Please refer to Figure 1 The present invention provides an LED constant power driving circuit with integrated intelligent charging and self-checking, comprising a primary power conversion circuit 1, a secondary rectification circuit 2, a battery charging circuit 3, an emergency boost circuit 4, a control circuit 5 and a DALI communication circuit 6;

[0020] The input end of the primary power conversion circuit 1 is connected to the external alternating current, the output end of the primary power conversion circuit 1 is electrically connected to the input end of the secondary rectifier circuit 2, the output end of the secondary rectifier circuit 2 is electrically connected to the input end of the battery charging circuit 3, the output end of the battery charging circuit 3 is electrically connected to the input end of the emergency Boost circuit 4, and the output end of the emergency Boost circuit 4 is electrically connected to the external LED 7;

[0021] The control circuit 5 is electrically connected to a detection terminal for detecting whether the external AC power is off, a battery charging circuit 3, an emergency Boost circuit 4 and a DALI communication circuit 6 respectively.

[0022] The beneficial effects of the present invention are:

[0023] By setting up a primary power conversion circuit, the input AC voltage is filtered and rectified, and the power factor is corrected and output. It is converted into a DC voltage through a secondary rectification and filtering circuit. The DC voltage supplies power to the battery charging circuit, and the battery charging circuit charges the battery with a constant current. When entering an emergency state, the lithium battery provides constant power drive to the LED lamp through the emergency Boost circuit. The control circuit detects the AC power status to achieve switching between normal lighting mode and emergency lighting mode. In addition, the control circuit controls the charging of the battery and detects the battery status in real time. In addition, the controller will regularly perform weekly and annual inspections to detect whether there are any abnormalities in the emergency product. The external DALI communication circuit can read the current status of the emergency controller or control the product to perform mode switching, parameter modification and other functions.

[0024] Furthermore, the primary power conversion circuit includes an EMC filter and rectifier circuit, a valley filling circuit and a PSR circuit. The input end of the EMC filter and rectifier circuit is connected to external alternating current, the output end of the EMC filter and rectifier circuit is electrically connected to the input end of the valley filling circuit, the output end of the valley filling circuit is electrically connected to the input end of the PSR circuit, and the output end of the PSR circuit is electrically connected to the input end of the secondary rectifier circuit.

[0025] From the above description, it can be seen that the EMC filter and rectifier circuit filters and rectifies the input AC voltage, corrects the power factor through the valley filling circuit, and then supplies power to the PSR circuit. The PSR circuit transmits energy to the secondary rectifier and filter circuit through the isolation transformer, and converts it into a DC voltage through the secondary rectifier and filter circuit.

[0026] Further, the EMC filter rectifier circuit includes a fuse resistor RF1, a rectifier bridge DB1, a varistor VR1, an X capacitor CX1, a common mode inductor LF1, a capacitor C9 and a terminal;

[0027] The wiring terminal includes a first pin N and a second pin L, the first end of the rectifier bridge DB1 is electrically connected to one end of the primary winding of the common-mode inductor LF1, the other end of the primary winding of the common-mode inductor LF1 is electrically connected to one end of the X-capacitor CX1, one end of the varistor VR1 and one end of the fuse resistor RF1 respectively, the other end of the fuse resistor F1 is electrically connected to the second pin L of the wiring terminal, the first pin N of the wiring terminal is electrically connected to the other end of the varistor RV1, one end of the secondary winding of the common-mode inductor LF1 and the other end of the X-capacitor CX1 respectively, the other end of the secondary winding of the common-mode inductor LF1 is electrically connected to the second end of the rectifier bridge DB1, the third end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C9, and the other end of the capacitor C9 is electrically connected to the fourth end of the rectifier bridge DB1 and grounded.

[0028] From the above description, it can be seen that the fuse resistor LF1 provides abnormal protection for the power supply, the X capacitor CX1 and the capacitor C9 are EMC differential mode filters to filter out differential mode interference; the common mode inductor LF1 constitutes an EMC common mode filtering circuit to filter out common mode interference, and the input AC power is converted into DC voltage through the rectifier bridge DB1.

[0029] Further, the valley filling circuit includes an electrolytic capacitor CE1, an electrolytic capacitor CE2, a diode D105, a diode D106 and a diode D107;

[0030] One end of the electrolytic capacitor CE1 is electrically connected to one end of the capacitor C9 and the cathode of the diode D107 respectively; the anode of the diode D107 is electrically connected to the cathode of the diode D106 and one end of the electrolytic capacitor CE2 respectively; the anode of the diode D106 is electrically connected to the other end of the electrolytic capacitor CE1 and the cathode of the diode D105 respectively; the anode of the diode D105 and the other end of the electrolytic capacitor CE2 are electrically connected to the other end of the capacitor C9 respectively.

[0031] It can be seen from the above description that the electrolytic capacitor CE1, the electrolytic capacitor CE2, the diode D105, the diode D106, and the diode D107 form a valley filling circuit to correct the input current waveform and improve the power factor and harmonics of the whole machine.

[0032] Further, the PSR circuit includes a chip U1, a resistor R111, a resistor R112, a resistor R113, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a resistor R106, a capacitor C107, a capacitor C104, a capacitor C105, a capacitor C106, a diode D108, a diode D109, a transistor Q101, a magnetic induction coil TR1A and a magnetic induction coil TR1B;

[0033] The chip U1 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin and a seventh pin; the first pin of the chip U1 is electrically connected to one end of the resistor R106 and one end of the resistor R105 respectively, the other end of the resistor R105 is grounded, the other end of the resistor R106 is electrically connected to one end of the magnetic induction coil TR1B and the positive electrode of the diode D109 respectively, the other end of the magnetic induction coil TR1B is grounded, the negative electrode of the diode D109 is electrically connected to one end of the capacitor C106 and one end of the resistor R104 respectively, the other end of the capacitor C106 is grounded, the other end of the resistor R104 is electrically connected to one end of the capacitor C105, the second pin of the chip U1 and the emitter of the transistor Q101 respectively, the other end of the capacitor C105 is grounded, and the base of the transistor Q101 is electrically connected to the capacitor C106 and the positive electrode of the diode D109 respectively. The collector of the transistor Q101, the other end of the capacitor C107 and the other end of the resistor R113 are all grounded. The other end of the resistor R112 is electrically connected to one end of the resistor R111. The other end of the resistor R111 is respectively electrically connected to the cathode of the diode D107, one end of the resistor R102, one end of the capacitor C104 and one end of the magnetic induction coil TR1A. The other end of the resistor R102 is respectively electrically connected to the other end of the capacitor C104 and one end of the resistor R103. The other end of the resistor R103 is electrically connected to the cathode of the diode D108. The anode of the diode D108 is respectively electrically connected to the third pin of the chip U1 and the other end of the magnetic induction coil TR1A. The fourth pin, the fifth pin, the sixth pin and the seventh pin of the chip U1 are all grounded.

[0034] From the above description, it can be seen that through the switch of the built-in field effect tube of chip U1, when the built-in field effect tube is turned on, that is, the third pin of the control chip is connected to the ground, the current rises at a certain slope, and the transformer TR1 stores energy; when the built-in field effect tube is turned off, the transformer TR1 provides energy to the secondary side and the auxiliary winding. Resistor R104, diode D109, capacitor C105, and capacitor C106 provide VCC voltage for chip U1. Resistor R102, resistor R103, capacitor C104, and diode D108 form a peak absorption circuit to reduce the voltage stress of the third pin of chip U1 and improve EMC interference; resistor R105, resistor R106, and magnetic induction coil TR1B form a voltage divider circuit, which is compared with the internal reference voltage of chip U1 to realize the control of the secondary output voltage by the primary feedback. The PSR circuit eliminates the secondary feedback components and optocouplers, simplifies the circuit and reduces costs.

[0035] Further, the secondary side rectifier circuit includes a resistor R107, a resistor R110, a capacitor C108, an electrolytic capacitor CE3, a diode D110 and a magnetic induction coil TR1C;

[0036] One end of the electrolytic capacitor CE3 is electrically connected to the cathode of the diode D110, one end of the capacitor C108, one end of the resistor R110 and the external VCC power supply, respectively; the other end of the capacitor C108 is electrically connected to one end of the resistor R107; the other end of the resistor R107 is electrically connected to the anode of the diode D110 and one end of the magnetic induction coil TR1C, respectively; the other end of the magnetic induction coil TR1C, the other end of the electrolytic capacitor CE3 and the other end of the resistor R110 are all grounded.

[0037] From the above description, it can be seen that the output rectification and filtering are realized by setting the magnetic induction coil TR1C, the diode D110 and the electrolytic capacitor CE3; the resistor R107 and the capacitor C108 constitute a peak absorption circuit to reduce the voltage stress of the diode D110 and improve the EMC interference of the LED drive circuit.

[0038] Further, the battery charging circuit includes a resistor R27, a resistor R74, a resistor R14, a resistor R25, a resistor R21, a resistor R33, a resistor R30, a resistor R20, a resistor R32, a resistor R34, a resistor R43, a resistor R28, a resistor R18, a resistor R19, a resistor R22, a capacitor C3, a capacitor C1, a capacitor C13, a capacitor C7, a capacitor C4, an electrolytic capacitor CE4, a diode D6, a diode D4, a diode D5, a transistor Q14, an integrated transistor U10, a field effect transistor Q6, a field effect transistor Q12, an inductor L1, a fuse F1, a chip U2 and a battery connector;

[0039] The chip U2 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin. The first pin of the chip U2 is electrically connected to one end of a resistor R19 and one end of a resistor R18, respectively. The other end of the resistor R19 is electrically connected to the positive electrode of a diode D5. The negative electrode of the diode D5 is electrically connected to one end of a resistor R22, one end of a capacitor C4 and the seventh pin of a chip U6 of the control circuit, respectively. The other end of the resistor R22, the other end of the capacitor C4 and the second pin of the chip U2 are all grounded. The other end of the resistor R18 is electrically connected to one end of a resistor R43 and the fourth pin of the chip U2, respectively. The fifth pin of the chip U2 is electrically connected to one end of a capacitor C7 and a VCC power supply of an external device, respectively. The other end of the capacitor C7 is grounded. The third pin of the chip U2 is electrically connected to one end of a resistor R28 and one end of a resistor R34, respectively. The other end of the resistor R28 is grounded.

[0040] One end of the electrolytic capacitor CE4 is electrically connected to the positive electrode of the diode D4 and one end of the inductor L1 respectively, the other end of the inductor L1 is electrically connected to the negative electrode of the diode D6 and the drain of the field effect transistor Q6 respectively, the positive electrode of the diode D6 and the other end of the electrolytic capacitor CE4 are both grounded, the gate of the field effect transistor Q6 is electrically connected to one end of the resistor R21, the other end of the resistor R21 is electrically connected to the third pin and the sixth pin of the integrated transistor U10 respectively, and the first pin of the integrated transistor U10 is electrically connected to the ground. The pins are respectively electrically connected to the source of the field effect tube Q6, the VCC power supply of the external device and one end of the resistor R14, the other end of the resistor R14 is respectively electrically connected to one end of the resistor R25, one end of the capacitor C1 and the collector of the transistor Q14, the other end of the resistor R25 is respectively electrically connected to the other end of the capacitor C1, the second pin and the fifth pin of the integrated transistor U10, the base of the transistor Q14 is respectively electrically connected to one end of the resistor R74, one end of the resistor R27 and one end of the capacitor C3, the The other end of the resistor R27 and the other end of the capacitor C3 are electrically connected to the fourteenth pin of the chip U6 of the control circuit respectively, the emitter of the transistor Q14, the other end of the resistor R74 and the fourth pin of the integrated transistor U10 are all grounded, the cathode of the diode D4 is electrically connected to one end of the resistor R33 and the other end of the resistor R34 respectively, the other end of the resistor R33 is electrically connected to the other end of the resistor R43, one end of the resistor R20 and the source of the field effect transistor Q12 respectively, the gate of the field effect transistor Q12 is electrically connected to one end of the resistor R30, the drain of the field effect transistor Q12 is electrically connected to one end of the fuse F1, the other end of the fuse F1 is electrically connected to the first pin BATT+ of the battery connector, the other end of the resistor R20 is electrically connected to one end of the resistor R32, one end of the capacitor C13 and the tenth pin of the chip U6 of the control circuit respectively, the other end of the resistor R30, the other end of the resistor R32, the second pin GND of the battery connector and the other end of the capacitor C13 are all grounded.

[0041] From the above description, it can be seen that the resistor R20, the resistor R32 and the capacitor C13 form a voltage divider circuit for detecting the voltage level of the lithium battery; the fuse F1 provides abnormal protection for the circuit; the field effect transistor Q12 and the resistor R30 are used for reverse connection protection of the lithium battery; the resistor R33, the resistor R34, the resistor R43, the resistor R28, the resistor R18, the resistor R19, the resistor R22, the capacitor C4, the capacitor C7, the diode D5 and the chip U2 constitute a lithium battery charging current detection circuit for detecting the charging current of the lithium battery. Resistor R27, resistor R74, resistor R14, resistor R25, resistor R21, capacitor C3, capacitor C1, electrolytic capacitor CE4, diode D4, diode D6, inductor L1, transistor Q14, integrated transistor U10 and field effect transistor Q6 constitute a BUCK circuit for charging the lithium battery. The control circuit adjusts the PWM duty cycle of the tenth pin of the control circuit chip U6 through the above-detected lithium battery voltage level and battery charging current to adjust the lithium battery charging current and the switch.

[0042] Further, the emergency Boost circuit includes resistor R6, resistor R7, resistor R38, resistor R47, resistor R47a, resistor R39, resistor R45, resistor R2, resistor R72, resistor R50, resistor R51, resistor R52, resistor R53, resistor R56, resistor R3, resistor R55, resistor R41, resistor R65, resistor R66, resistor R67, capacitor C21, capacitor C16, capacitor C20, capacitor C19, capacitor C26, capacitor C30 , capacitor C31, capacitor C32, capacitor C12, capacitor C29, capacitor C50, electrolytic capacitor CE5, electrolytic capacitor CE6, diode D3, diode D8, diode D7, diode D2, Zener diode DZ1, Zener diode DZ2, transistor Q3, transistor Q2, transistor Q61, transistor Q19, field effect transistor Q18, field effect transistor Q9, field effect transistor Q20, inductor L2, relay K2, chip U5, chip U7, chip U8 and light connector;

[0043] The chip U5 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first pin of the chip U5 is electrically connected to one end of the capacitor C20, the cathode of the diode D8, one end of the resistor R41 and the emitter of the transistor Q19 respectively; the second pin of the chip U5 and the other end of the capacitor C20 are both grounded; the third pin of the chip U5 is electrically connected to one end of the capacitor C16; the fourth pin of the chip U5 is electrically connected to one end of the capacitor C21, the anode of the diode D8, the cathode of the diode D3 and the source of the field effect transistor Q9 respectively; the other end of the capacitor C21 is grounded; the fourth pin of the chip U5 is electrically connected to the other end of the capacitor C16; the gate of the field effect transistor Q9 is electrically connected to the anode of the diode D3 and the VCC power supply of the peripheral device respectively;

[0044] The chip U7 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin and an eighth pin; the first pin of the chip U7 is electrically connected to one end of the resistor R52 and one end of the resistor R53 respectively; the second pin of the chip U7 is electrically connected to one end of the resistor R50 and the other end of the resistor R53 respectively; the third pin of the chip U7 is electrically connected to one end of the resistor R47, one end of the resistor R47a, one end of the resistor R45, one end of the resistor R51, the source of the field effect transistor Q20, one end of the capacitor C19, one end of the electrolytic capacitor CE6, the fourth pin of the relay K2 and the fifth pin of the chip U7 respectively; the fourth pin of the chip U7 is grounded; the sixth pin of the chip U7 is electrically connected to the seventh pin of the chip U7; the eighth pin of the chip U7 is electrically connected to one end of the capacitor C26, one end of the capacitor C29, one end of the capacitor C50, the eighth pin of the chip U8 and the collector of the transistor Q19 respectively;

[0045] The chip U8 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin and an eighth pin; the first pin of the chip U8 is electrically connected to one end of the capacitor C30 and the other end of the resistor R51 respectively; the second pin of the chip U8 is electrically connected to one end of the capacitor C31 and one end of the resistor R56 respectively; the other end of the resistor R56 is electrically connected to one end of the capacitor C32; the other end of the capacitor C31 and the other end of the capacitor C32 are both grounded; the third pin of the chip U8 is electrically connected to one end of the capacitor C12, one end of the resistor R3, the other end of the resistor R52 and one end of the voltage stabilizing diode DZ2 respectively; the capacitor The other end of C12, the other end of the resistor R3, the fourth pin of the chip U8 and the fifth pin of the chip U8 are all grounded; the sixth pin of the chip U8 is electrically connected to one end of the resistor R44; the seventh pin of the chip U8 is electrically connected to one end of the resistor R55; the other end of the resistor R55 is grounded; the base of the transistor Q19 is electrically connected to the other end of the resistor R41 and one end of the resistor R65 respectively; the other end of the resistor R65 is electrically connected to the collector of the transistor Q61; the base of the transistor Q61 is electrically connected to one end of the resistor R66 and one end of the resistor R67 respectively; the emitter of the transistor Q61 and the other end of the resistor R67 are both grounded;

[0046] One end of the electrolytic capacitor CE5 is electrically connected to the drain of the field effect tube Q18 and one end of the inductor L2 respectively; the gate of the field effect tube Q18 is electrically connected to one end of the resistor R38 and the collector of the transistor Q3 respectively; the source of the field effect tube Q18 is electrically connected to the other end of the resistor R38; the base of the transistor Q3 is electrically connected to one end of the resistor R6 and one end of the resistor R7 respectively; the other end of the electrolytic capacitor CE5, the other end of the resistor R7, the other end of the resistor R47a and the other end of the resistor R50 are all grounded, and the emitter of the transistor Q19 is electrically connected to the external VCC power supply; the other end of the inductor L2 is electrically connected to the drain of the field effect tube Q20 and the positive electrode of the diode D7 respectively; the gate of the field effect tube Q20 is electrically connected to the other end of the resistor R44; the cathode of the diode D7 is electrically connected to the other end of the capacitor C19, the other end of the electrolytic capacitor CE6, one end of the resistor R39, one end of the voltage regulator diode DZ1 respectively The first end of the relay K2 is electrically connected to the cathode of the diode D2; the second pin of the relay K2 is electrically connected to the anode of the diode D2 and the collector of the transistor Q2 respectively; the base of the transistor Q2 is electrically connected to one end of the resistor R2 and one end of the resistor R72 respectively; the emitter of the transistor Q2 and the other end of the resistor R72 are both grounded; the fifth pin of the relay K2 is electrically connected to the LED+ pin of the lighting connector; the sixth pin of the relay K2 is electrically connected to the LED- pin of the lighting connector; the seventh pin of the relay K2 is electrically connected to the DRIVER_IN+ pin of the lighting connector; the eighth pin of the relay K2 is electrically connected to the DRIVER_IN- pin of the lighting connector.

[0047] From the above description, it can be known that the field effect transistor Q9, the diode D3, the diode D8, the capacitor C21, the capacitor C16, the capacitor C20, and the chip U5 constitute a voltage doubling circuit, which doubles the voltage of the lithium battery and outputs a voltage to power the chip U7 and the chip U8; the field effect transistor Q8, the transistor Q3, the resistor R6, the resistor R7, the resistor R38, the transistor Q19, the transistor Q61, the transistor Q2, the diode D2, the resistor R41, the resistor R65, the resistor R66, the resistor R67, the resistor R2, the resistor R72, Capacitor C50 and relay K2 form an emergency Boost switching circuit. When the mains power is normal, transistor Q3 works in the cut-off region, field effect transistor Q18 is not conducting, and transistor Q61 is in the cut-off region, transistor Q61 is not conducting, transistor Q61 works in the saturation region, the relay switches, the LED is disconnected from the Boost circuit, and the Boost circuit does not work; when the mains power is abnormal, transistor Q3 works in the saturation region, field effect transistor Q18 is conducting, and transistor Q61 works in the saturation region, transistor Q61 is conducting, Boost circuit chip U7 and chip U8 are powered, transistor Q61 works in the cut-off zone, the relay is switched, the LED is connected to the Boost circuit, and the Boost circuit starts to work; a PWM square wave is output through chip U8 to control the switch of field effect tube Q20, when field effect tube Q20 is turned on, inductor L2 stores energy, and when field effect tube Q20 is turned off, inductor L2 releases energy to provide energy for LED; resistor R47, resistor R47a, resistor R47, resistor R50, resistor R53, resistor R52, resistor R3, and chip U7 constitute an amplifier circuit to amplify the battery discharge current detection voltage; the third pin of chip U8 controls the switch of field effect tube Q20 by detecting the above-mentioned amplified battery discharge current detection voltage to achieve constant power output; in addition, the third pin of chip U8 detects the LED voltage through voltage regulator diode DZ1 and voltage regulator diode DZ2 to realize hardware output overvoltage protection; capacitor C19 and electrolytic capacitor CE6 have filtering function; resistor R39 and resistor R39 constitute a voltage divider circuit to detect the LED voltage.

[0048] Further, the control circuit includes resistor R58, resistor R59, resistor R100, resistor R42, resistor R108, resistor R109, resistor R35, resistor R4, resistor R8, resistor R10, resistor R5, resistor R9, resistor R11, capacitor C6, capacitor C35, capacitor C5, capacitor C27, capacitor C28, capacitor C33, capacitor C24, capacitor C25, capacitor C100, capacitor C34, capacitor C15, crystal oscillator X501, optical coupler U9A, optical coupler U3B, transistor Q4, transistor Q5, chip U4, chip U6, connector SW, connector IND1 and connector IND2;

[0049] The chip U4 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first pin of the chip U4 is electrically connected to one end of the capacitor C6, the third pin of the chip U4 and the DRV_VCC of the emergency bosst circuit respectively; the second pin of the chip U4 and the other end of the capacitor C6 are both grounded; the fourth pin of the chip U4 is electrically connected to one end of the capacitor C35; the fifth pin of the chip U4 is electrically connected to one end of the capacitor C5, one end of the capacitor C27, one end of the capacitor C28, one end of the resistor R58, one end of the resistor R100, one end of the resistor R42, one end of the resistor R35 and the fourth pin of the chip U6 respectively; the other end of the resistor R58 is electrically connected to the capacitor C33 One end of the chip U6 is electrically connected to the sixth pin of the chip U6; the other end of the capacitor C35, the other end of the capacitor C5, the other end of the capacitor C27, the other end of the capacitor C28, the other end of the capacitor C33 and the fifth pin of the chip U6 are all grounded; the second pin of the chip U6 is electrically connected to one end of the crystal oscillator X501 and one end of the capacitor C24 respectively; the third pin of the chip U6 is electrically connected to the other end of the crystal oscillator X501 and one end of the capacitor C25 respectively; the other end of the capacitor C24 and the other end of the capacitor C25 are both grounded; the 30th pin of the chip U6 is electrically connected to one end of the capacitor C100, one end of the resistor R59 and the other end of the resistor R100 respectively; the other end of the capacitor C100 is grounded; The seventh pin of the chip U6 is electrically connected to the CHRG_CURR_SIG of the battery charging circuit; the ninth pin of the chip U6 is electrically connected to the LED_RLY_CRTL of the emergency Boost circuit; the tenth pin of the chip U6 is electrically connected to the BATT_VOLTAGE of the emergency Boost circuit; the eleventh pin of the chip U6 is electrically connected to the FDBK_LM3478 of the emergency Boost circuit; the twelfth pin of the chip U6 is electrically connected to the LED_VOLATAGE of the emergency Boost circuit; the thirteenth pin of the chip U6 is electrically connected to the DRV_EN of the emergency Boost circuit; the fourteenth pin of the chip U6 is electrically connected to the CHRG_CURR_SIG of the battery charging circuit _PWM_SIG is electrically connected; the fifteenth pin of the chip U6 is electrically connected to one end of the resistor R8; the other end of the resistor R8 is electrically connected to one end of the resistor R10 and the base of the transistor Q4 respectively; the collector of the transistor Q4 is electrically connected to one end of the resistor R4 and the connector IND1 respectively; the emitter of the transistor Q4 and the other end of the resistor R10 are both grounded; the sixteenth pin of the chip U6 is electrically connected to one end of the resistor R9; the other end of the resistor R9 is electrically connected to one end of the resistor R11 and the base of the transistor Q5 respectively; the collector of the transistor Q5 is electrically connected to one end of the resistor R5 and the connector IND2 respectively; the emitter of the transistor Q5 and the other end of the resistor R11 are both grounded;The seventeenth pin of the chip U6 is electrically connected to BOOST_EN of the emergency Boost circuit; the eighteenth pin of the chip U6 is electrically connected to one end of the optocoupler U9A; the other end of the optocoupler U9A is electrically connected to the other end of the resistor R42; the nineteenth pin of the chip U6 is electrically connected to one end of the optocoupler U3B, one end of the capacitor C15 and the other end of the resistor R35 respectively; the other end of the optocoupler U3B and the other end of the capacitor C15 are both grounded; the twenty-second pin of the chip U6 is electrically connected to one end of the resistor R108, one end of the resistor R109 and one end of the capacitor C34 respectively; the other end of the resistor R109 and the other end of the capacitor C34 are both grounded; the other end of the resistor R108 is electrically connected to the VCC power supply of the peripheral. ;

[0050] From the above description, it can be known that resistors R4, R5, R8, R9, R10, R11, transistor Q4 and transistor Q5 control the display of the indicator light; the software burned by chip U6 detects the signals of BATT_VOLTAGE and CHRG_CURR_SIG, adjusts the duty cycle of CHRG_PWM_SIG PWM signal to adjust the charging current of lithium battery, and detects the status of lithium battery at the same time. When the abnormality of lithium battery is detected, the battery charging is stopped, and the indicator light flashes slowly in red to indicate the abnormality of lithium battery; resistor R100 and resistor R59 and connector SW constitute a manual test emergency function. Connector SW is externally connected to a switch. When the external switch is short-circuited, the controller switches to emergency mode to detect whether the emergency can be performed normally; when the AC power is abnormal, the chip U6 is used to detect the abnormality of AC power. DRV_EN and BOOST_EN output high potential, and the emergency Boost circuit starts working; the current of the emergency lamp is detected by the chip FDBK_LM3478, and the voltage of the emergency lamp is detected by the chip LED_VOLATAGE. When the lamp is abnormal, the control circuit can detect this abnormality and output the chip U6 DRV_EN and BOOST_EN low potential, the emergency Boost circuit stops working, and the indicator light is always red to indicate that the current lithium battery is abnormal; in addition, the chip U6 of the control circuit is internally timed, and the execution function test and duration test are customized to detect whether the emergency function of the whole lamp and the battery capacity meet the requirements. If not, the indicator light switches to the corresponding abnormal indication state; the resistor R35, the capacitor C15 and the optocoupler U3B are used to receive commands from the external host through the DALI communication circuit; the resistor R42 and the optocoupler U3B are used to respond to the commands of the external host through the DALI communication circuit.

[0051] Further, the DALI communication circuit includes resistor R26, resistor R29, resistor R15, resistor R16, resistor R23, resistor R24, resistor R12, resistor R13, resistor R17, resistor R31, resistor R36, resistor R37, resistor R40, capacitor C2, capacitor C8, capacitor C10, capacitor C11, capacitor C17, capacitor C18, capacitor C14, transistor Q7, transistor Q10, transistor Q8, transistor Q15, transistor Q16, transistor Q17, optical coupler U3A, optical coupler U9B, voltage regulator diode DZ3, rectifier bridge DB2, varistor RV1, fuse F2, connector DALI1 and connector DALI2;

[0052] The first pin of the rectifier bridge DB2 is electrically connected to one end of the fuse F2 and one end of the varistor RV1 respectively; the other end of the fuse F2 is electrically connected to the connector DALI1; the second pin of the rectifier bridge DB2 is electrically connected to one end of the resistor R13, the other end of the varistor RV1 and the connector DALI2 respectively; the third pin of the rectifier bridge DB2 is electrically connected to one end of the resistor R12, one end of the capacitor C2, the collector of the transistor Q7, the emitter of the transistor Q8 and the collector of the transistor Q10 respectively; the fourth pin of the rectifier bridge DB2 is electrically connected to the other end of the capacitor C2, one end of the capacitor C8, the resistor R The base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, one end of the capacitor C17, one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 is electrically connected to the base of the transistor Q16, the other end of the resistor R31, the other end of the capacitor C11, the other end of the capacitor C18 and one end of the voltage zener diode DZ3; the base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, the other end of the capacitor C17, the one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 is electrically connected to the base of the transistor Q16, the other end of the resistor R31, the other end of the capacitor C11, the one end of the capacitor C18 and one end of the voltage zener diode DZ3; the base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, the other end of the capacitor C17, the one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 One end of the resistor R15 is electrically connected to one end of the resistor R15; the other end of the resistor R15 is electrically connected to one end of the resistor R16; the other end of the resistor R16 is electrically connected to one end of the resistor R24; the other end of the resistor R24 ​​is electrically connected to the collector of the transistor Q8 and the base of the transistor Q15 respectively; the other end of the resistor R12 is electrically connected to the base of the transistor Q8 and the emitter of the transistor Q15 respectively; the other end of the resistor R13 is electrically connected to one end of the resistor R17; the other end of the resistor R17 is electrically connected to the other end of the resistor R31, the other end of the capacitor C11 and the base of the transistor Q16 respectively; the transistor Q1 The collector of transistor Q6 is electrically connected to the collector of transistor Q15 and one end of optocoupler U3A respectively; the other end of the optocoupler U3A is electrically connected to the emitter of transistor Q17 and one end of capacitor C14 respectively; the base of transistor Q17 is electrically connected to the other end of capacitor C14 and the other end of zener diode DZ3 respectively; the collector of transistor Q17 is electrically connected to one end of resistor R40; the other end of resistor R40 is electrically connected to one end of resistor R37, the other end of capacitor C18 and the other end of capacitor C17 respectively; the other end of resistor R37 is electrically connected to the other end of resistor R36 and the other end of optocoupler U9B respectively.

[0053] From the above description, it can be seen that resistor R26, resistor R29, resistor R15, resistor R16, resistor R23, resistor R24, resistor R12, resistor R36, resistor R37, resistor R40, capacitor C2, capacitor C8, capacitor C10, capacitor C17, capacitor C18, capacitor C14, transistor Q7, transistor Q10, transistor Q8, transistor Q15, transistor Q17, optocoupler U3A, optocoupler U9B, Zener diode DZ3, and rectifier bridge DB2 constitute a DALI communication circuit. When an external instruction is sent, the instruction is sent to the control circuit through the optocoupler U3A, and the controller responds through the DALI communication circuit after receiving the instruction; resistor R13, resistor R17, resistor R31, capacitor C11, varistor RV1 and transistor Q16 constitute overvoltage protection to protect connector DALI1 / DALI2 from damage caused by wrong connection to the line.

[0054] Please refer to Figures 1 to 6 , Embodiment 1 of the present invention is:

[0055] The present invention provides an LED constant power driving circuit with integrated intelligent charging and self-checking, comprising a primary power conversion circuit, a secondary rectification circuit, a battery charging circuit, an emergency Boost circuit, a control circuit and a DALI communication circuit;

[0056] The input end of the primary power conversion circuit is connected to external alternating current, the output end of the primary power conversion circuit is electrically connected to the input end of the secondary rectifier circuit, the output end of the secondary rectifier circuit is electrically connected to the input end of the battery charging circuit, the output end of the battery charging circuit is electrically connected to the input end of the emergency Boost circuit, and the output end of the emergency Boost circuit is electrically connected to an external LED;

[0057] The control circuit is electrically connected to a detection terminal for detecting whether external AC power is off, a battery charging circuit, an emergency Boost circuit and a DALI communication circuit respectively.

[0058] In this embodiment, the primary power conversion circuit includes an EMC filter rectifier circuit, a valley filling circuit and a PSR circuit, the input end of the EMC filter rectifier circuit is connected to the external AC power, the output end of the EMC filter rectifier circuit is electrically connected to the input end of the valley filling circuit, the output end of the valley filling circuit is electrically connected to the input end of the PSR circuit, and the output end of the PSR circuit is electrically connected to the input end of the secondary rectifier circuit. The EMC filter rectifier circuit filters and rectifies the input AC voltage, performs power factor correction through the valley filling circuit, and then supplies power to the PSR circuit. The PSR circuit transmits energy to the secondary rectifier filter circuit through an isolation transformer, and converts the energy into a DC voltage through the secondary rectifier filter circuit.

[0059] In this embodiment, if Figure 2 , the EMC filter rectifier circuit includes a fuse resistor RF1, a rectifier bridge DB1, a varistor VR1, an X capacitor CX1, a common mode inductor LF1, a capacitor C9 and a terminal;

[0060] The wiring terminal includes a first pin N and a second pin L, the first end of the rectifier bridge DB1 is electrically connected to one end of the primary winding of the common-mode inductor LF1, the other end of the primary winding of the common-mode inductor LF1 is electrically connected to one end of the X-capacitor CX1, one end of the varistor VR1 and one end of the fuse resistor RF1 respectively, the other end of the fuse resistor F1 is electrically connected to the second pin L of the wiring terminal, the first pin N of the wiring terminal is electrically connected to the other end of the varistor RV1, one end of the secondary winding of the common-mode inductor LF1 and the other end of the X-capacitor CX1 respectively, the other end of the secondary winding of the common-mode inductor LF1 is electrically connected to the second end of the rectifier bridge DB1, the third end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C9, and the other end of the capacitor C9 is electrically connected to the fourth end of the rectifier bridge DB1 and grounded.

[0061] In this embodiment, if Figure 2 , the valley filling circuit includes an electrolytic capacitor CE1, an electrolytic capacitor CE2, a diode D105, a diode D106 and a diode D107;

[0062] One end of the electrolytic capacitor CE1 is electrically connected to one end of the capacitor C9 and the cathode of the diode D107 respectively; the anode of the diode D107 is electrically connected to the cathode of the diode D106 and one end of the electrolytic capacitor CE2 respectively; the anode of the diode D106 is electrically connected to the other end of the electrolytic capacitor CE1 and the cathode of the diode D105 respectively; the anode of the diode D105 and the other end of the electrolytic capacitor CE2 are electrically connected to the other end of the capacitor C9 respectively.

[0063] In this embodiment, if Figure 2The PSR circuit includes a chip U1, a resistor R111, a resistor R112, a resistor R113, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a resistor R106, a capacitor C107, a capacitor C104, a capacitor C105, a capacitor C106, a diode D108, a diode D109, a transistor Q101, a magnetic induction coil TR1A and a magnetic induction coil TR1B; wherein the chip U1 model is LNK623DG, the resistance value of the resistor R111 is 1MΩ, the resistance value of the resistor R112 is 1MΩ, the resistance value of the resistor R113 is 62KΩ, and the resistance value of the resistor R102 is 200KΩ, the resistance value of resistor R103 is 43Ω, the resistance value of resistor R104 is 7.5KΩ, the resistance value of resistor R105 is 5.1KΩ, the resistance value of resistor R106 is 41.2KΩ, the capacitance value of capacitor C107 is 2.2uF, the capacitance value of capacitor C104 is 390pF, the capacitance value of capacitor C105 is 1uF, the capacitance value of capacitor C106 is 10uF, the model of diode D108 is US1M, the model of diode D109 is BAV21WS, the model of transistor Q101 is BC857C, the model of magnetic induction coil TR1A is EFD16, and the model of magnetic induction coil TR1B is EFD16.

[0064] The chip U1 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin and a seventh pin; the first pin of the chip U1 is electrically connected to one end of the resistor R106 and one end of the resistor R105 respectively, the other end of the resistor R105 is grounded, the other end of the resistor R106 is electrically connected to one end of the magnetic induction coil TR1B and the positive electrode of the diode D109 respectively, the other end of the magnetic induction coil TR1B is grounded, the negative electrode of the diode D109 is electrically connected to one end of the capacitor C106 and one end of the resistor R104 respectively, the other end of the capacitor C106 is grounded, the other end of the resistor R104 is electrically connected to one end of the capacitor C105, the second pin of the chip U1 and the emitter of the transistor Q101 respectively, the other end of the capacitor C105 is grounded, and the base of the transistor Q101 is electrically connected to the capacitor C106 and the positive electrode of the diode D109 respectively. The collector of the transistor Q101, the other end of the capacitor C107 and the other end of the resistor R113 are all grounded. The other end of the resistor R112 is electrically connected to one end of the resistor R111. The other end of the resistor R111 is respectively electrically connected to the cathode of the diode D107, one end of the resistor R102, one end of the capacitor C104 and one end of the magnetic induction coil TR1A. The other end of the resistor R102 is respectively electrically connected to the other end of the capacitor C104 and one end of the resistor R103. The other end of the resistor R103 is electrically connected to the cathode of the diode D108. The anode of the diode D108 is respectively electrically connected to the third pin of the chip U1 and the other end of the magnetic induction coil TR1A. The fourth pin, the fifth pin, the sixth pin and the seventh pin of the chip U1 are all grounded.

[0065] In this embodiment, if Figure 3 , the secondary side rectifier circuit includes a resistor R107, a resistor R110, a capacitor C108, an electrolytic capacitor CE3, a diode D110 and a magnetic induction coil TR1C; wherein the resistance value of the resistor R107 is 30Ω, the resistance value of the resistor R110 is 10KΩ, the capacitance value of the capacitor C108 is 390pF, the capacitance value of the electrolytic capacitor CE3 is pF, the model of the diode D110 is KΩ, and the model of the magnetic induction coil TR1C is EFD16;

[0066] One end of the electrolytic capacitor CE3 is electrically connected to the cathode of the diode D110, one end of the capacitor C108, one end of the resistor R110 and the external VCC power supply, respectively; the other end of the capacitor C108 is electrically connected to one end of the resistor R107; the other end of the resistor R107 is electrically connected to the anode of the diode D110 and one end of the magnetic induction coil TR1C, respectively; the other end of the magnetic induction coil TR1C, the other end of the electrolytic capacitor CE3 and the other end of the resistor R110 are all grounded.

[0067] In this embodiment, if Figure 3 The battery charging circuit includes a resistor R27, a resistor R74, a resistor R14, a resistor R25, a resistor R21, a resistor R33, a resistor R30, a resistor R20, a resistor R32, a resistor R34, a resistor R43, a resistor R28, a resistor R18, a resistor R19, a resistor R22, a capacitor C3, a capacitor C1, a capacitor C13, a capacitor C7, a capacitor C4, an electrolytic capacitor CE4, a diode D6, a diode D4, a diode D5, a transistor Q14, and an integrated transistor U 10. Field effect transistor Q6, field effect transistor Q12, inductor L1, fuse F1, chip U2 and battery connector; among them, the resistance value of resistor R27 is 220Ω, the resistance value of resistor R74 is 10KΩ, the resistance value of resistor R14 is 4.7KΩ, the resistance value of resistor R25 is 220Ω, the resistance value of resistor R21 is 47Ω, the resistance value of resistor R33 is 0.27Ω, the resistance value of resistor R30 is 10KΩ, the resistance value of resistor R20 is 10KΩ, and the resistance value of resistor R32 is 2K Ω, the resistance value of resistor R34 is 51KΩ, the resistance value of resistor R43 is 51KΩ, the resistance value of resistor R28 is 100KΩ, the resistance value of resistor R18 is 100KΩ, the resistance value of resistor R19 is 100Ω, the resistance value of resistor R22 is 100KΩ, the capacitance value of capacitor C3 is 10pF, the capacitance value of capacitor C1 is 10pF, the capacitance value of capacitor C13 is 10nF, the capacitance value of capacitor C7 is 100nF, the capacitance value of capacitor C4 is 1nF, and the capacitance value of electrolytic capacitor CE4 is 2 20uF, diode D6 model is B340AF, diode D4 model is B340AF, diode D5 model is 0Ω, transistor Q14 model is BC847C, integrated transistor U10 model is IMZ1AT108, field effect tube Q6 model is DMP1045U, field effect tube Q12 model is DMP1045U, inductor L1 inductance is 27uH, fuse F1 model is 1206F3A063V, chip U2 model is MCP6001;

[0068] The chip U2 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin. The first pin of the chip U2 is electrically connected to one end of a resistor R19 and one end of a resistor R18, respectively. The other end of the resistor R19 is electrically connected to the positive electrode of a diode D5. The negative electrode of the diode D5 is electrically connected to one end of a resistor R22, one end of a capacitor C4 and the seventh pin of a chip U6 of the control circuit, respectively. The other end of the resistor R22, the other end of the capacitor C4 and the second pin of the chip U2 are all grounded. The other end of the resistor R18 is electrically connected to one end of a resistor R43 and the fourth pin of the chip U2, respectively. The fifth pin of the chip U2 is electrically connected to one end of a capacitor C7 and a VCC power supply of an external device, respectively. The other end of the capacitor C7 is grounded. The third pin of the chip U2 is electrically connected to one end of a resistor R28 and one end of a resistor R34, respectively. The other end of the resistor R28 is grounded.

[0069] One end of the electrolytic capacitor CE4 is electrically connected to the positive electrode of the diode D4 and one end of the inductor L1 respectively, the other end of the inductor L1 is electrically connected to the negative electrode of the diode D6 and the drain of the field effect transistor Q6 respectively, the positive electrode of the diode D6 and the other end of the electrolytic capacitor CE4 are both grounded, the gate of the field effect transistor Q6 is electrically connected to one end of the resistor R21, the other end of the resistor R21 is electrically connected to the third pin and the sixth pin of the integrated transistor U10 respectively, and the first pin of the integrated transistor U10 is electrically connected to the ground. The pins are respectively electrically connected to the source of the field effect tube Q6, the VCC power supply of the external device and one end of the resistor R14, the other end of the resistor R14 is respectively electrically connected to one end of the resistor R25, one end of the capacitor C1 and the collector of the transistor Q14, the other end of the resistor R25 is respectively electrically connected to the other end of the capacitor C1, the second pin and the fifth pin of the integrated transistor U10, the base of the transistor Q14 is respectively electrically connected to one end of the resistor R74, one end of the resistor R27 and one end of the capacitor C3, the The other end of the resistor R27 and the other end of the capacitor C3 are electrically connected to the fourteenth pin of the chip U6 of the control circuit respectively, the emitter of the transistor Q14, the other end of the resistor R74 and the fourth pin of the integrated transistor U10 are all grounded, the cathode of the diode D4 is electrically connected to one end of the resistor R33 and the other end of the resistor R34 respectively, the other end of the resistor R33 is electrically connected to the other end of the resistor R43, one end of the resistor R20 and the source of the field effect transistor Q12 respectively, the gate of the field effect transistor Q12 is electrically connected to one end of the resistor R30, the drain of the field effect transistor Q12 is electrically connected to one end of the fuse F1, the other end of the fuse F1 is electrically connected to the first pin BATT+ of the battery connector, the other end of the resistor R20 is electrically connected to one end of the resistor R32, one end of the capacitor C13 and the tenth pin of the chip U6 of the control circuit respectively, the other end of the resistor R30, the other end of the resistor R32, the second pin GND of the battery connector and the other end of the capacitor C13 are all grounded.

[0070] In this embodiment, if Figure 4The emergency Boost circuit includes a resistor R6, a resistor R7, a resistor R38, a resistor R47, a resistor R47a, a resistor R39, a resistor R45, a resistor R2, a resistor R72, a resistor R50, a resistor R51, a resistor R52, a resistor R53, a resistor R56, a resistor R3, a resistor R55, a resistor R41, a resistor R65, a resistor R66, a resistor R67, a capacitor C21, a capacitor C16, a capacitor C20, a capacitor C19, a capacitor C26, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C12, a capacitor C29, a capacitor C50, an electrolytic capacitor CE5, an electrolytic capacitor CE6, a diode D3, a diode D8, a diode D7, a diode D2, a voltage regulator diode DZ1, and a voltage regulator diode D Z2, transistor Q3, transistor Q2, transistor Q61, transistor Q19, field effect transistor Q18, field effect transistor Q9, field effect transistor Q20, inductor L2, relay K2, chip U5, chip U7, chip U8 and lighting connector; wherein, the resistance value of resistor R6 is 10KΩ, the resistance value of resistor R7 is 100KΩ, the resistance value of resistor R38 is 10KΩ, the resistance value of resistor R47 is 0.2Ω, the resistance value of resistor R47a is 0.2Ω, the resistance value of resistor R39 is 100KΩ, the resistance value of resistor R45 is 3.9KΩ, the resistance value of resistor R2 is 1KΩ, the resistance value of resistor R72 is 10KΩ, the resistance value of resistor R50 is 5.1KΩ, the resistance value of resistor R51 is 1KΩ, and the resistance value of resistor R52 is 3.9KΩ, the resistance value of resistor R53 is 68KΩ, the resistance value of resistor R56 is 180KΩ, the resistance value of resistor R3 is 100KΩ, the resistance value of resistor R55 is 100KΩ, the resistance value of resistor R41 is 10KΩ, the resistance value of resistor R65 is 1KΩ, the resistance value of resistor R66 is 1KΩ, the resistance value of resistor R67 is 100KΩ, the capacitance value of capacitor C21 is 1uF, the capacitance value of capacitor C16 is 10uF, the capacitance value of capacitor C20 is 10uF, the capacitance value of capacitor C19 is 100nF, the capacitance value of capacitor C26 is 100nF, the capacitance value of capacitor C30 is 10pF, the capacitance value of capacitor C31 is 100nF, the capacitance value of capacitor C32 is 100nF, the capacitance value of capacitor C12 is 10nF, the capacitance value of capacitor C29 is 100nF, the capacitance value of capacitor C50 is 1uF, the capacitance value of electrolytic capacitor CE5 is 470uF, the capacitance value of electrolytic capacitor CE6 is 4 7uF, diode D3 model is 1N4148WS, diode D8 model is 1N4148WS, diode D7 model is SK510B, diode D2 model is 1N4148WS, voltage regulator diode DZ1 model is BZT52C15V, voltage regulator diode DZ2 model is BZT52C43V, transistor Q3 model is BC847C, transistor Q2 model is BC847C, transistor Q61 model is BC847C, transistor Q19 model is BC857C, field effect tube Q18 model is DMP1045U, field effect tube Q9 model is DMP1045U, field effect tube Q20 model is AOD2910, inductor L2 inductance is 18uH, relay K2 model is HF32FA-G, chip U5 model is LM2767, chip U7 model is TLV272, chip U8 model is LM3478MM;.

[0071] The chip U5 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first pin of the chip U5 is electrically connected to one end of the capacitor C20, the cathode of the diode D8, one end of the resistor R41 and the emitter of the transistor Q19 respectively; the second pin of the chip U5 and the other end of the capacitor C20 are both grounded; the third pin of the chip U5 is electrically connected to one end of the capacitor C16; the fourth pin of the chip U5 is electrically connected to one end of the capacitor C21, the anode of the diode D8, the cathode of the diode D3 and the source of the field effect transistor Q9 respectively; the other end of the capacitor C21 is grounded; the fourth pin of the chip U5 is electrically connected to the other end of the capacitor C16; the gate of the field effect transistor Q9 is electrically connected to the anode of the diode D3 and the VCC power supply of the peripheral device respectively;

[0072] The chip U7 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin and an eighth pin; the first pin of the chip U7 is electrically connected to one end of the resistor R52 and one end of the resistor R53 respectively; the second pin of the chip U7 is electrically connected to one end of the resistor R50 and the other end of the resistor R53 respectively; the third pin of the chip U7 is electrically connected to one end of the resistor R47, one end of the resistor R47a, one end of the resistor R45, one end of the resistor R51, the source of the field effect transistor Q20, one end of the capacitor C19, one end of the electrolytic capacitor CE6, the fourth pin of the relay K2 and the fifth pin of the chip U7 respectively; the fourth pin of the chip U7 is grounded; the sixth pin of the chip U7 is electrically connected to the seventh pin of the chip U7; the eighth pin of the chip U7 is electrically connected to one end of the capacitor C26, one end of the capacitor C29, one end of the capacitor C50, the eighth pin of the chip U8 and the collector of the transistor Q19 respectively;

[0073] The chip U8 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin and an eighth pin; the first pin of the chip U8 is electrically connected to one end of the capacitor C30 and the other end of the resistor R51 respectively; the second pin of the chip U8 is electrically connected to one end of the capacitor C31 and one end of the resistor R56 respectively; the other end of the resistor R56 is electrically connected to one end of the capacitor C32; the other end of the capacitor C31 and the other end of the capacitor C32 are both grounded; the third pin of the chip U8 is electrically connected to one end of the capacitor C12, one end of the resistor R3, the other end of the resistor R52 and one end of the voltage stabilizing diode DZ2 respectively; the capacitor The other end of C12, the other end of the resistor R3, the fourth pin of the chip U8 and the fifth pin of the chip U8 are all grounded; the sixth pin of the chip U8 is electrically connected to one end of the resistor R44; the seventh pin of the chip U8 is electrically connected to one end of the resistor R55; the other end of the resistor R55 is grounded; the base of the transistor Q19 is electrically connected to the other end of the resistor R41 and one end of the resistor R65 respectively; the other end of the resistor R65 is electrically connected to the collector of the transistor Q61; the base of the transistor Q61 is electrically connected to one end of the resistor R66 and one end of the resistor R67 respectively; the emitter of the transistor Q61 and the other end of the resistor R67 are both grounded;

[0074] One end of the electrolytic capacitor CE5 is electrically connected to the drain of the field effect tube Q18 and one end of the inductor L2 respectively; the gate of the field effect tube Q18 is electrically connected to one end of the resistor R38 and the collector of the transistor Q3 respectively; the source of the field effect tube Q18 is electrically connected to the other end of the resistor R38; the base of the transistor Q3 is electrically connected to one end of the resistor R6 and one end of the resistor R7 respectively; the other end of the electrolytic capacitor CE5, the other end of the resistor R7, the other end of the resistor R47a and the other end of the resistor R50 are all grounded, and the emitter of the transistor Q19 is electrically connected to the external VCC power supply; the other end of the inductor L2 is electrically connected to the drain of the field effect tube Q20 and the positive electrode of the diode D7 respectively; the gate of the field effect tube Q20 is electrically connected to the other end of the resistor R44; the cathode of the diode D7 is electrically connected to the other end of the capacitor C19, the other end of the electrolytic capacitor CE6, one end of the resistor R39, one end of the voltage regulator diode DZ1 respectively The first end of the relay K2 is electrically connected to the cathode of the diode D2; the second pin of the relay K2 is electrically connected to the anode of the diode D2 and the collector of the transistor Q2 respectively; the base of the transistor Q2 is electrically connected to one end of the resistor R2 and one end of the resistor R72 respectively; the emitter of the transistor Q2 and the other end of the resistor R72 are both grounded; the fifth pin of the relay K2 is electrically connected to the LED+ pin of the lighting connector; the sixth pin of the relay K2 is electrically connected to the LED- pin of the lighting connector; the seventh pin of the relay K2 is electrically connected to the DRIVER_IN+ pin of the lighting connector; the eighth pin of the relay K2 is electrically connected to the DRIVER_IN- pin of the lighting connector.

[0075] In this embodiment, if Figure 5The control circuit includes resistor R58, resistor R59, resistor R100, resistor R42, resistor R108, resistor R109, resistor R35, resistor R4, resistor R8, resistor R10, resistor R5, resistor R9, resistor R11, capacitor C6, capacitor C35, capacitor C5, capacitor C27, capacitor C28, capacitor C33, capacitor C24, capacitor C25, capacitor C100, capacitor C34, capacitor C15, crystal oscillator X501, optical coupler U9A, optical coupler U3B, triode Tube Q4, transistor Q5, chip U4, chip U6, connector SW, connector IND1 and connector IND2; wherein, the resistance value of resistor R58 is 10KΩ, the resistance value of resistor R59 is 10Ω, the resistance value of resistor R100 is 1KΩ, the resistance value of resistor R42 is 300Ω, the resistance value of resistor R108 is 10KΩ, the resistance value of resistor R109 is 5.1KΩ, the resistance value of resistor R35 is 5.1KΩ, the resistance value of resistor R4 is 1KΩ, the resistance value of resistor R8 is 1KΩ, and the resistance The resistance value of R10 is 100KΩ, the resistance value of resistor R5 is 1KΩ, the resistance value of resistor R9 is 1KΩ, the resistance value of resistor R11 is 100KΩ, the capacitance value of capacitor C6 is 1uF, the capacitance value of capacitor C35 is 10nF, the capacitance value of capacitor C5 is 4.7uF, the capacitance value of capacitor C27 is 100nF, the capacitance value of capacitor C28 is 4.7uF, the capacitance value of capacitor C33 is 100nF, the capacitance value of capacitor C24 is 22pF, the capacitance value of capacitor C25 is 22pF, and the capacitance value of capacitor C100 is 100nF. The capacitance value is 100nF, the capacitance value of capacitor C34 is 100nF, the capacitance value of capacitor C15 is 220pF, the crystal oscillator X501 model is SC-32S, the optocoupler U9A model is LTV-1007-TP1-G, the optocoupler U3B model is LTV-1007-TP1-G, the transistor Q4 model is BC847C, the transistor Q5 model is BC847C, the chip U4 model is LP2985-25DBVR, and the chip U6 model is STM32G030K6T6;

[0076] The chip U4 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first pin of the chip U4 is electrically connected to one end of the capacitor C6, the third pin of the chip U4 and the DRV_VCC of the emergency bosst circuit respectively; the second pin of the chip U4 and the other end of the capacitor C6 are both grounded; the fourth pin of the chip U4 is electrically connected to one end of the capacitor C35; the fifth pin of the chip U4 is electrically connected to one end of the capacitor C5, one end of the capacitor C27, one end of the capacitor C28, one end of the resistor R58, one end of the resistor R100, one end of the resistor R42, one end of the resistor R35 and the fourth pin of the chip U6 respectively; the other end of the resistor R58 is electrically connected to the capacitor C33 One end of the chip U6 is electrically connected to the sixth pin of the chip U6; the other end of the capacitor C35, the other end of the capacitor C5, the other end of the capacitor C27, the other end of the capacitor C28, the other end of the capacitor C33 and the fifth pin of the chip U6 are all grounded; the second pin of the chip U6 is electrically connected to one end of the crystal oscillator X501 and one end of the capacitor C24 respectively; the third pin of the chip U6 is electrically connected to the other end of the crystal oscillator X501 and one end of the capacitor C25 respectively; the other end of the capacitor C24 and the other end of the capacitor C25 are both grounded; the 30th pin of the chip U6 is electrically connected to one end of the capacitor C100, one end of the resistor R59 and the other end of the resistor R100 respectively; the other end of the capacitor C100 is grounded; The seventh pin of the chip U6 is electrically connected to the CHRG_CURR_SIG of the battery charging circuit; the ninth pin of the chip U6 is electrically connected to the LED_RLY_CRTL of the emergency Boost circuit; the tenth pin of the chip U6 is electrically connected to the BATT_VOLTAGE of the emergency Boost circuit; the eleventh pin of the chip U6 is electrically connected to the FDBK_LM3478 of the emergency Boost circuit; the twelfth pin of the chip U6 is electrically connected to the LED_VOLATAGE of the emergency Boost circuit; the thirteenth pin of the chip U6 is electrically connected to the DRV_EN of the emergency Boost circuit; the fourteenth pin of the chip U6 is electrically connected to the CHRG_CURR_SIG of the battery charging circuit _PWM_SIG is electrically connected; the fifteenth pin of the chip U6 is electrically connected to one end of the resistor R8; the other end of the resistor R8 is electrically connected to one end of the resistor R10 and the base of the transistor Q4 respectively; the collector of the transistor Q4 is electrically connected to one end of the resistor R4 and the connector IND1 respectively; the emitter of the transistor Q4 and the other end of the resistor R10 are both grounded; the sixteenth pin of the chip U6 is electrically connected to one end of the resistor R9; the other end of the resistor R9 is electrically connected to one end of the resistor R11 and the base of the transistor Q5 respectively; the collector of the transistor Q5 is electrically connected to one end of the resistor R5 and the connector IND2 respectively; the emitter of the transistor Q5 and the other end of the resistor R11 are both grounded;The seventeenth pin of the chip U6 is electrically connected to BOOST_EN of the emergency Boost circuit; the eighteenth pin of the chip U6 is electrically connected to one end of the optocoupler U9A; the other end of the optocoupler U9A is electrically connected to the other end of the resistor R42; the nineteenth pin of the chip U6 is electrically connected to one end of the optocoupler U3B, one end of the capacitor C15 and the other end of the resistor R35 respectively; the other end of the optocoupler U3B and the other end of the capacitor C15 are both grounded; the twenty-second pin of the chip U6 is electrically connected to one end of the resistor R108, one end of the resistor R109 and one end of the capacitor C34 respectively; the other end of the resistor R109 and the other end of the capacitor C34 are both grounded; the other end of the resistor R108 is electrically connected to the VCC power supply of the peripheral. ;

[0077] In this embodiment, if Figure 6The DALI communication circuit includes a resistor R26, a resistor R29, a resistor R15, a resistor R16, a resistor R23, a resistor R24, a resistor R12, a resistor R13, a resistor R17, a resistor R31, a resistor R36, a resistor R37, a resistor R40, a capacitor C2, a capacitor C8, a capacitor C10, a capacitor C11, a capacitor C17, a capacitor C18, a capacitor C14, a transistor Q7, a transistor Q10, a transistor Q8, a transistor Q15, a transistor Q16, a transistor Q17, an optical coupler U3A, an optical coupler U9B, a stabilizer diode DZ3, rectifier bridge DB2, varistor RV1, fuse F2, connector DALI1 and connector DALI2; wherein, the resistance value of resistor R26 is 5.6KΩ, the resistance value of resistor R29 is 1KΩ, the resistance value of resistor R15 is 62KΩ, the resistance value of resistor R16 is 62KΩ, the resistance value of resistor R23 is 62KΩ, the resistance value of resistor R24 ​​is 62KΩ, the resistance value of resistor R12 is 330Ω, the resistance value of resistor R13 is 470Ω, the resistance value of resistor R17 is 470Ω, and the resistance value of resistor R31 is 3.3KΩ, the resistance value of resistor R36 is 1.8MΩ, the resistance value of resistor R37 is 10KΩ, the resistance value of resistor R40 is 47Ω, the capacitance value of capacitor C2 is 100pF, the capacitance value of capacitor C8 is 15nF, the capacitance value of capacitor C10 is 10nF, the capacitance value of capacitor C11 is 1nF, the capacitance value of capacitor C17 is 1nF, the capacitance value of capacitor C18 is 2.2uF, the capacitance value of capacitor C14 is 22nF, the transistor Q7 model is TSC966, the transistor Q10 model is TSC873, and the transistor Q8 model is B C857B, transistor Q15 model is TSA1765, transistor Q16 model is BC847B, transistor Q17 model is BC857B, optocoupler U3A model is LTV-1007-TP1-G, optocoupler U9B model is LTV-1007-TP1-G, Zener diode DZ3 model is BZT52C5V6, rectifier bridge DB2 model is LMD10, varistor RV2 model is HSP1210SV390V0200, fuse F2 model is 2410H4A250V;

[0078] The first pin of the rectifier bridge DB2 is electrically connected to one end of the fuse F2 and one end of the varistor RV1 respectively; the other end of the fuse F2 is electrically connected to the connector DALI1; the second pin of the rectifier bridge DB2 is electrically connected to one end of the resistor R13, the other end of the varistor RV1 and the connector DALI2 respectively; the third pin of the rectifier bridge DB2 is electrically connected to one end of the resistor R12, one end of the capacitor C2, the collector of the transistor Q7, the emitter of the transistor Q8 and the collector of the transistor Q10 respectively; the fourth pin of the rectifier bridge DB2 is electrically connected to the other end of the capacitor C2, one end of the capacitor C8, the resistor R The base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, one end of the capacitor C17, one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 is electrically connected to the base of the transistor Q16, the other end of the resistor R31, the other end of the capacitor C11, the other end of the capacitor C18 and one end of the voltage zener diode DZ3; the base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, the other end of the capacitor C17, the one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 is electrically connected to the base of the transistor Q16, the other end of the resistor R31, the other end of the capacitor C11, the one end of the capacitor C18 and one end of the voltage zener diode DZ3; the base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, the other end of the capacitor C17, the one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 One end of the resistor R15 is electrically connected to one end of the resistor R15; the other end of the resistor R15 is electrically connected to one end of the resistor R16; the other end of the resistor R16 is electrically connected to one end of the resistor R24; the other end of the resistor R24 ​​is electrically connected to the collector of the transistor Q8 and the base of the transistor Q15 respectively; the other end of the resistor R12 is electrically connected to the base of the transistor Q8 and the emitter of the transistor Q15 respectively; the other end of the resistor R13 is electrically connected to one end of the resistor R17; the other end of the resistor R17 is electrically connected to the other end of the resistor R31, the other end of the capacitor C11 and the base of the transistor Q16 respectively; the transistor Q1 The collector of transistor Q6 is respectively electrically connected to the collector of transistor Q15 and one end of the optocoupler U3A; the other end of the optocoupler U3A is respectively electrically connected to the emitter of transistor Q17 and one end of capacitor C14; the base of transistor Q17 is respectively electrically connected to the other end of capacitor C14 and the other end of the voltage-stabilizing diode DZ3; the collector of transistor Q17 is electrically connected to one end of resistor R40; the other end of resistor R40 is respectively electrically connected to one end of resistor R37, the other end of capacitor C18 and the other end of capacitor C17; the other end of resistor R37 is respectively electrically connected to the other end of resistor R36 and the other end of the optocoupler U9B. The working principle of the above-mentioned LED constant power driving circuit with integrated intelligent charging and self-checking is as follows:

[0079] The fuse resistor LF1 provides abnormal protection for the power supply. The X capacitor CX1 and the capacitor C9 are EMC differential mode filters to filter out differential mode interference. The common mode inductor LF1 constitutes an EMC common mode filtering circuit to filter out common mode interference. The input AC power is converted into DC voltage through the rectifier bridge DB1.

[0080] Electrolytic capacitor CE1, electrolytic capacitor CE2, diode D105, diode D106 and diode D107 form a valley filling circuit to correct the input current waveform and improve the power factor and harmonics of the whole machine.

[0081] Through the switch of the built-in field effect tube of chip U1, when the built-in field effect tube is turned on, that is, the third pin of the control chip is connected to the ground, the current rises at a certain slope, and the transformer TR1 stores energy; when the built-in field effect tube is turned off, the transformer TR1 provides energy to the secondary side and the auxiliary winding. Resistor R104, diode D109, capacitor C105, and capacitor C106 provide VCC voltage for chip U1. Resistor R102, resistor R103, capacitor C104, and diode D108 form a peak absorption circuit to reduce the voltage stress of the third pin of the control chip U1 and improve EMC interference; resistor R105, resistor R106, and magnetic induction coil TR1B form a voltage divider circuit, which is compared with the internal reference voltage of chip U1 to realize the control of the secondary output voltage by the primary feedback. The PSR circuit eliminates the secondary feedback components and optocouplers, simplifies the circuit and reduces costs.

[0082] Output rectification and filtering are achieved by setting up the magnetic induction coil TR1C, the diode D110, and the electrolytic capacitor CE3; the resistor R107 and the capacitor C108 constitute a peak absorption circuit to reduce the voltage stress of the diode D110 and improve the EMC interference of the LED drive circuit.

[0083] Resistor R20, resistor R32 and capacitor C13 form a voltage divider circuit for detecting the voltage level of the lithium battery; fuse F1 provides abnormal protection for the circuit; field effect transistor Q12 and resistor R30 are used for reverse connection protection of the lithium battery; resistor R33, resistor R34, resistor R43, resistor R28, resistor R18, resistor R19, resistor R22, capacitor C4, capacitor C7, diode D5 and chip U2 form a lithium battery charging current detection circuit for detecting the charging current of the lithium battery; resistor R27, resistor R74, resistor R14, resistor R25, resistor R21, capacitor C3, capacitor C1, electrolytic capacitor CE4, diode D4, diode D6, inductor L1, transistor Q14, integrated transistor U10 and field effect transistor Q6 form a BUCK circuit for charging the lithium battery, and the control circuit adjusts the PWM duty cycle of the tenth pin of the control circuit chip U6 through the above-detected lithium battery voltage level and battery charging current to adjust the battery lithium charging current and switch.

[0084] Field effect transistor Q9, diode D3, diode D8, capacitor C21, capacitor C16, capacitor C20, chip U5 form a voltage doubling circuit, which doubles the voltage of the lithium battery and outputs a voltage to power chips U7 and U8; field effect transistor Q8, transistor Q3, resistor R6, resistor R7, resistor R38, transistor Q19, transistor Q61, transistor Q2, diode D2, resistor R41, resistor R65, resistor R66, resistor R67, resistor R2, resistor R72, capacitor C50, Relay K2 forms an emergency Boost switching circuit. When the mains power is normal, transistor Q3 works in the cut-off area, field effect transistor Q18 is not conducting, and transistor Q61 is in the cut-off area, transistor Q61 is not conducting, transistor Q61 works in the saturation area, the relay switches, the LED is disconnected from the Boost circuit, and the Boost circuit does not work; when the mains power is abnormal, transistor Q3 works in the saturation area, field effect transistor Q18 is conducting, and transistor Q61 works in the saturation area, transistor Q61 is conducting, which is Boos The circuit chip U7 and the chip U8 are powered, the transistor Q61 works in the cut-off area, the relay is switched, the LED is connected to the Boost circuit, and the Boost circuit starts to work; a PWM square wave is output through the chip U8 to control the switch of the field effect tube Q20. When the field effect tube Q20 is turned on, the inductor L2 stores energy. When the field effect tube Q20 is turned off, the inductor L2 releases energy to provide energy for the LED; the resistor R47, the resistor R47a, the resistor R47, the resistor R50, the resistor R53, the resistor R52, the resistor R3, and the chip U7 constitute an amplifier circuit to amplify the battery discharge current detection voltage; the third pin of the chip U8 controls the switch of the field effect tube Q20 by detecting the above-mentioned amplified battery discharge current detection voltage to achieve constant power output; in addition, the third pin of the chip U8 detects the LED voltage through the voltage regulator diode DZ1 and the voltage regulator diode DZ2 to realize hardware output overvoltage protection; the capacitor C19 and the electrolytic capacitor CE6 have a filtering function; the resistor R39 and the resistor R39 constitute a voltage divider circuit to detect the LED voltage.

[0085] Resistors R4, R5, R8, R9, R10, R11, transistors Q4 and Q5 control the display of the indicator light. The software burned into chip U6 detects the signals of BATT_VOLTAGE and CHRG_CURR_SIG, adjusts the duty cycle of CHRG_PWM_SIG PWM signal to adjust the charging current of lithium battery, and detects the status of lithium battery at the same time. When the abnormality of lithium battery is detected, the battery charging is stopped, and the indicator light flashes slowly in red to indicate the abnormality of lithium battery. Resistors R100 and R59 and connector SW constitute the manual test emergency function. Connector SW is connected to the switch externally. When the external switch is short-circuited, the controller switches to the emergency mode to detect whether the emergency can be performed normally. When the AC power is abnormal, the chip U6 is used to detect whether the emergency can be performed normally. DRV_EN and BOOST_EN output high potential, and the emergency Boost circuit starts to work; the current of the emergency lamp is detected by the chip FDBK_LM3478, and the voltage of the emergency lamp is detected by the chip LED_VOLATAGE. When the lamp is abnormal, the control circuit can detect this abnormality and output the chip U6DRV_EN and BOOST_EN to low potential, the emergency Boost circuit stops working, and the indicator light is always red to indicate that the current lithium battery is abnormal; in addition, the chip U6 of the control circuit is internally timed, and the execution function test and duration test are customized to detect whether the emergency function of the whole lamp and the battery capacity meet the requirements. If not, the indicator light switches to the corresponding abnormal indication state; the resistor R35, the capacitor C15 and the optocoupler U3B are used to receive commands from the external host through the DALI communication circuit; the resistor R42 and the optocoupler U3B are used to respond to the commands of the external host through the DALI communication circuit;

[0086] Resistor R26, resistor R29, resistor R15, resistor R16, resistor R23, resistor R24, resistor R12, resistor R36, resistor R37, resistor R40, capacitor C2, capacitor C8, capacitor C10, capacitor C17, capacitor C18, capacitor C14, transistor Q7, transistor Q10, transistor Q8, transistor Q15, transistor Q17, optocoupler U3A, optocoupler U9B, voltage regulator diode DZ3, rectifier bridge DB2 constitute a DALI communication circuit. When an external instruction is sent, the instruction is sent to the control circuit through the optocoupler U3A, and the controller responds through the DALI communication circuit after receiving the instruction; resistor R13, resistor R17, resistor R31, capacitor C11, varistor and transistor Q16 constitute overvoltage protection to protect the connector DALI1 / DALI2 from damage caused by wrong connection to the line;

[0087] The constant current LED driver circuit integrated with emergency lighting designed in this scheme has the following advantages:

[0088] 1. This circuit improves the power factor and harmonic current through valley filling circuit, and can match various types of drives. The harmonics and power factor of the whole machine meet the standard requirements;

[0089] 2. The circuit provides a stable voltage for the secondary side by setting up a PSR circuit, eliminating the secondary side feedback components and optocouplers, simplifying the circuit and reducing costs;

[0090] 3. The circuit uses a battery charging circuit with an intelligent constant current charging method. It detects the battery voltage level to control the battery charging switch. Through this method, the battery charging time is reduced and the energy consumption is reduced. In addition, the circuit has battery abnormality protection, including battery overcharge, over discharge, over current, short circuit and other protection functions;

[0091] 4. This circuit uses an emergency Boost circuit, which is a constant power drive and can match a wide voltage LED, making it convenient for customers to use and reduce the number of emergency controller drive models and costs.

[0092] 5. This circuit provides an indicator light function, and the working status of the product can be determined by the indicator light status.

[0093] 6. The circuit has a self-check function, which can regularly check whether the emergency function is normal and reduce the cost of manual maintenance.

[0094] 7. The circuit supports DALI communication function and can be controlled by the host. The working status of each product on the DALI bus can be read on the host to reduce manual maintenance costs.

[0095] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An LED constant power drive circuit with self-checking and integrated intelligent charging, characterized in that: Including primary power conversion circuit, secondary rectification circuit, battery charging circuit, emergency boost circuit, control circuit and DALI communication circuit; The input end of the primary power conversion circuit is connected to external alternating current, the output end of the primary power conversion circuit is electrically connected to the input end of the secondary rectifier circuit, the output end of the secondary rectifier circuit is electrically connected to the input end of the battery charging circuit, the output end of the battery charging circuit is electrically connected to the input end of the emergency Boost circuit, and the output end of the emergency Boost circuit is electrically connected to an external LED; The control circuit is electrically connected to a detection terminal for detecting whether the external AC power is off, a battery charging circuit, an emergency Boost circuit and a DALI communication circuit respectively; The primary power conversion circuit includes an EMC filter rectifier circuit, a valley filling circuit and a PSR circuit, wherein the input end of the EMC filter rectifier circuit is connected to an external alternating current, the output end of the EMC filter rectifier circuit is electrically connected to the input end of the valley filling circuit, the output end of the valley filling circuit is electrically connected to the input end of the PSR circuit, and the output end of the PSR circuit is electrically connected to the input end of the secondary rectifier circuit; The EMC filter rectifier circuit includes a fuse resistor RF1, a rectifier bridge DB1, a varistor VR1, an X capacitor CX1, a common mode inductor LF1, a capacitor C9 and a wiring terminal; The wiring terminal includes a first pin N and a second pin L, the first end of the rectifier bridge DB1 is electrically connected to one end of the primary winding of the common mode inductor LF1, the other end of the primary winding of the common mode inductor LF1 is electrically connected to one end of the X capacitor CX1, one end of the varistor VR1 and one end of the fuse resistor RF1 respectively, the other end of the fuse resistor F1 is electrically connected to the second pin L of the wiring terminal, the first pin N of the wiring terminal is electrically connected to the other end of the varistor RV1, one end of the secondary winding of the common mode inductor LF1 and the other end of the X capacitor CX1 respectively, the other end of the secondary winding of the common mode inductor LF1 is electrically connected to the second end of the rectifier bridge DB1, the third end of the rectifier bridge DB1 is electrically connected to one end of the capacitor C9, and the other end of the capacitor C9 is electrically connected to the fourth end of the rectifier bridge DB1 and grounded; The valley filling circuit includes an electrolytic capacitor CE1, an electrolytic capacitor CE2, a diode D105, a diode D106 and a diode D107; One end of the electrolytic capacitor CE1 is electrically connected to one end of the capacitor C9 and the cathode of the diode D107; the anode of the diode D107 is electrically connected to the cathode of the diode D106 and one end of the electrolytic capacitor CE2; the anode of the diode D106 is electrically connected to the other end of the electrolytic capacitor CE1 and the cathode of the diode D105; the anode of the diode D105 and the other end of the electrolytic capacitor CE2 are electrically connected to the other end of the capacitor C9; The battery charging circuit includes a resistor R27, a resistor R74, a resistor R14, a resistor R25, a resistor R21, a resistor R33, a resistor R30, a resistor R20, a resistor R32, a resistor R34, a resistor R43, a resistor R28, a resistor R18, a resistor R19, a resistor R22, a capacitor C3, a capacitor C1, a capacitor C13, a capacitor C7, a capacitor C4, an electrolytic capacitor CE4, a diode D6, a diode D4, a diode D5, a transistor Q14, an integrated transistor U10, a field effect transistor Q6, a field effect transistor Q12, an inductor L1, a fuse F1, a chip U2 and a battery connector; The chip U2 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin. The first pin of the chip U2 is electrically connected to one end of a resistor R19 and one end of a resistor R18, respectively. The other end of the resistor R19 is electrically connected to the positive electrode of a diode D5. The negative electrode of the diode D5 is electrically connected to one end of a resistor R22, one end of a capacitor C4 and the seventh pin of a chip U6 of the control circuit, respectively. The other end of the resistor R22, the other end of the capacitor C4 and the second pin of the chip U2 are all grounded. The other end of the resistor R18 is electrically connected to one end of a resistor R43 and the fourth pin of the chip U2, respectively. The fifth pin of the chip U2 is electrically connected to one end of a capacitor C7 and a VCC power supply of an external device, respectively. The other end of the capacitor C7 is grounded. The third pin of the chip U2 is electrically connected to one end of a resistor R28 and one end of a resistor R34, respectively. The other end of the resistor R28 is grounded. One end of the electrolytic capacitor CE4 is electrically connected to the positive electrode of the diode D4 and one end of the inductor L1 respectively, the other end of the inductor L1 is electrically connected to the negative electrode of the diode D6 and the drain of the field effect transistor Q6 respectively, the positive electrode of the diode D6 and the other end of the electrolytic capacitor CE4 are both grounded, the gate of the field effect transistor Q6 is electrically connected to one end of the resistor R21, the other end of the resistor R21 is electrically connected to the third pin and the sixth pin of the integrated transistor U10 respectively, and the first pin of the integrated transistor U10 is electrically connected to the ground. The pins are respectively electrically connected to the source of the field effect tube Q6, the VCC power supply of the external device and one end of the resistor R14, the other end of the resistor R14 is respectively electrically connected to one end of the resistor R25, one end of the capacitor C1 and the collector of the transistor Q14, the other end of the resistor R25 is respectively electrically connected to the other end of the capacitor C1, the second pin and the fifth pin of the integrated transistor U10, the base of the transistor Q14 is respectively electrically connected to one end of the resistor R74, one end of the resistor R27 and one end of the capacitor C3, the The other end of the resistor R27 and the other end of the capacitor C3 are electrically connected to the fourteenth pin of the chip U6 of the control circuit respectively, the emitter of the transistor Q14, the other end of the resistor R74 and the fourth pin of the integrated transistor U10 are all grounded, the cathode of the diode D4 is electrically connected to one end of the resistor R33 and the other end of the resistor R34 respectively, the other end of the resistor R33 is electrically connected to the other end of the resistor R43, one end of the resistor R20 and the source of the field effect transistor Q12 respectively, the gate of the field effect transistor Q12 is electrically connected to one end of the resistor R30, the drain of the field effect transistor Q12 is electrically connected to one end of the fuse F1, the other end of the fuse F1 is electrically connected to the first pin BATT+ of the battery connector, the other end of the resistor R20 is electrically connected to one end of the resistor R32, one end of the capacitor C13 and the tenth pin of the chip U6 of the control circuit respectively, the other end of the resistor R30, the other end of the resistor R32, the second pin GND of the battery connector and the other end of the capacitor C13 are all grounded.

2. According to claim 1, a LED constant power driving circuit with self-checking integrated with intelligent charging is characterized in that: The PSR circuit includes a chip U1, a resistor R111, a resistor R112, a resistor R113, a resistor R102, a resistor R103, a resistor R104, a resistor R105, a resistor R106, a capacitor C107, a capacitor C104, a capacitor C105, a capacitor C106, a diode D108, a diode D109, a transistor Q101, a magnetic induction coil TR1A and a magnetic induction coil TR1B; The chip U1 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin and a seventh pin; the first pin of the chip U1 is electrically connected to one end of the resistor R106 and one end of the resistor R105 respectively, the other end of the resistor R105 is grounded, the other end of the resistor R106 is electrically connected to one end of the magnetic induction coil TR1B and the positive electrode of the diode D109 respectively, the other end of the magnetic induction coil TR1B is grounded, the negative electrode of the diode D109 is electrically connected to one end of the capacitor C106 and one end of the resistor R104 respectively, the other end of the capacitor C106 is grounded, the other end of the resistor R104 is electrically connected to one end of the capacitor C105, the second pin of the chip U1 and the emitter of the transistor Q101 respectively, the other end of the capacitor C105 is grounded, and the base of the transistor Q101 is electrically connected to the capacitor C106 and the positive electrode of the diode D109 respectively. The collector of the transistor Q101, the other end of the capacitor C107 and the other end of the resistor R113 are all grounded. The other end of the resistor R112 is electrically connected to one end of the resistor R111. The other end of the resistor R111 is respectively electrically connected to the cathode of the diode D107, one end of the resistor R102, one end of the capacitor C104 and one end of the magnetic induction coil TR1A. The other end of the resistor R102 is respectively electrically connected to the other end of the capacitor C104 and one end of the resistor R103. The other end of the resistor R103 is electrically connected to the cathode of the diode D108. The anode of the diode D108 is respectively electrically connected to the third pin of the chip U1 and the other end of the magnetic induction coil TR1A. The fourth pin, the fifth pin, the sixth pin and the seventh pin of the chip U1 are all grounded.

3. The LED constant power driving circuit with self-checking integrated with intelligent charging according to claim 1, characterized in that: The secondary side rectifier circuit includes a resistor R107, a resistor R110, a capacitor C108, an electrolytic capacitor CE3, a diode D110 and a magnetic induction coil TR1C; One end of the electrolytic capacitor CE3 is electrically connected to the cathode of the diode D110, one end of the capacitor C108, one end of the resistor R110 and the external VCC power supply, respectively; the other end of the capacitor C108 is electrically connected to one end of the resistor R107; the other end of the resistor R107 is electrically connected to the anode of the diode D110 and one end of the magnetic induction coil TR1C, respectively; the other end of the magnetic induction coil TR1C, the other end of the electrolytic capacitor CE3 and the other end of the resistor R110 are all grounded.

4. The LED constant power driving circuit with self-checking integrated with intelligent charging according to claim 1, characterized in that: The emergency Boost circuit includes a resistor R6, a resistor R7, a resistor R38, a resistor R47, a resistor R47a, a resistor R39, a resistor R45, a resistor R2, a resistor R72, a resistor R50, a resistor R51, a resistor R52, a resistor R53, a resistor R56, a resistor R3, a resistor R55, a resistor R41, a resistor R65, a resistor R66, a resistor R67, a capacitor C21, a capacitor C16, a capacitor C20, a capacitor C19, a capacitor C26, a capacitor C30, a capacitor C31, a capacitor C32, a capacitor C33, a capacitor C34, a capacitor C35, a capacitor C36, a capacitor C37, a capacitor C38, a capacitor C39, a capacitor C40, a capacitor C41, a capacitor C42, a capacitor C43, a capacitor C44, a capacitor C45, a capacitor C46, ​​a capacitor C47, a capacitor C48, a capacitor C49, a capacitor C40, a capacitor C41, a capacitor C42 Capacitor C31, capacitor C32, capacitor C12, capacitor C29, capacitor C50, electrolytic capacitor CE5, electrolytic capacitor CE6, diode D3, diode D8, diode D7, diode D2, Zener diode DZ1, Zener diode DZ2, transistor Q3, transistor Q2, transistor Q61, transistor Q19, field effect transistor Q18, field effect transistor Q9, field effect transistor Q20, inductor L2, relay K2, chip U5, chip U7, chip U8 and light connector; The chip U5 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first pin of the chip U5 is electrically connected to one end of the capacitor C20, the cathode of the diode D8, one end of the resistor R41 and the emitter of the transistor Q19 respectively; the second pin of the chip U5 and the other end of the capacitor C20 are both grounded; the third pin of the chip U5 is electrically connected to one end of the capacitor C16; the fourth pin of the chip U5 is electrically connected to one end of the capacitor C21, the anode of the diode D8, the cathode of the diode D3 and the source of the field effect transistor Q9 respectively; the other end of the capacitor C21 is grounded; the fourth pin of the chip U5 is electrically connected to the other end of the capacitor C16; the gate of the field effect transistor Q9 is electrically connected to the anode of the diode D3 and the VCC power supply of the peripheral device respectively; The chip U7 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin and an eighth pin; the first pin of the chip U7 is electrically connected to one end of the resistor R52 and one end of the resistor R53 respectively; the second pin of the chip U7 is electrically connected to one end of the resistor R50 and the other end of the resistor R53 respectively; the third pin of the chip U7 is electrically connected to one end of the resistor R47, one end of the resistor R47a, one end of the resistor R45, one end of the resistor R51, the source of the field effect transistor Q20, one end of the capacitor C19, one end of the electrolytic capacitor CE6, the fourth pin of the relay K2 and the fifth pin of the chip U7 respectively; the fourth pin of the chip U7 is grounded; the sixth pin of the chip U7 is electrically connected to the seventh pin of the chip U7; the eighth pin of the chip U7 is electrically connected to one end of the capacitor C26, one end of the capacitor C29, one end of the capacitor C50, the eighth pin of the chip U8 and the collector of the transistor Q19 respectively; The chip U8 includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin and an eighth pin; the first pin of the chip U8 is electrically connected to one end of the capacitor C30 and the other end of the resistor R51 respectively; the second pin of the chip U8 is electrically connected to one end of the capacitor C31 and one end of the resistor R56 respectively; the other end of the resistor R56 is electrically connected to one end of the capacitor C32; the other end of the capacitor C31 and the other end of the capacitor C32 are both grounded; the third pin of the chip U8 is electrically connected to one end of the capacitor C12, one end of the resistor R3, the other end of the resistor R52 and one end of the voltage stabilizing diode DZ2 respectively; the capacitor The other end of C12, the other end of the resistor R3, the fourth pin of the chip U8 and the fifth pin of the chip U8 are all grounded; the sixth pin of the chip U8 is electrically connected to one end of the resistor R44; the seventh pin of the chip U8 is electrically connected to one end of the resistor R55; the other end of the resistor R55 is grounded; the base of the transistor Q19 is electrically connected to the other end of the resistor R41 and one end of the resistor R65 respectively; the other end of the resistor R65 is electrically connected to the collector of the transistor Q61; the base of the transistor Q61 is electrically connected to one end of the resistor R66 and one end of the resistor R67 respectively; the emitter of the transistor Q61 and the other end of the resistor R67 are both grounded; One end of the electrolytic capacitor CE5 is electrically connected to the drain of the field effect tube Q18 and one end of the inductor L2 respectively; the gate of the field effect tube Q18 is electrically connected to one end of the resistor R38 and the collector of the transistor Q3 respectively; the source of the field effect tube Q18 is electrically connected to the other end of the resistor R38; the base of the transistor Q3 is electrically connected to one end of the resistor R6 and one end of the resistor R7 respectively; the other end of the electrolytic capacitor CE5, the other end of the resistor R7, the other end of the resistor R47a and the other end of the resistor R50 are all grounded, and the emitter of the transistor Q19 is electrically connected to the external VCC power supply; the other end of the inductor L2 is electrically connected to the drain of the field effect tube Q20 and the positive electrode of the diode D7 respectively; the gate of the field effect tube Q20 is electrically connected to the other end of the resistor R44; the cathode of the diode D7 is electrically connected to the other end of the capacitor C19, the other end of the electrolytic capacitor CE6, one end of the resistor R39, one end of the voltage regulator diode DZ1 respectively The first end of the relay K2 is electrically connected to the cathode of the diode D2; the second pin of the relay K2 is electrically connected to the anode of the diode D2 and the collector of the transistor Q2 respectively; the base of the transistor Q2 is electrically connected to one end of the resistor R2 and one end of the resistor R72 respectively; the emitter of the transistor Q2 and the other end of the resistor R72 are both grounded; the fifth pin of the relay K2 is electrically connected to the LED+ pin of the lighting connector; the sixth pin of the relay K2 is electrically connected to the LED- pin of the lighting connector; the seventh pin of the relay K2 is electrically connected to the DRIVER_IN+ pin of the lighting connector; the eighth pin of the relay K2 is electrically connected to the DRIVER_IN- pin of the lighting connector.

5. The LED constant power driving circuit with self-checking integrated with intelligent charging according to claim 1, characterized in that: The control circuit includes resistor R58, resistor R59, resistor R100, resistor R42, resistor R108, resistor R109, resistor R35, resistor R4, resistor R8, resistor R10, resistor R5, resistor R9, resistor R11, capacitor C6, capacitor C35, capacitor C5, capacitor C27, capacitor C28, capacitor C33, capacitor C24, capacitor C25, capacitor C100, capacitor C34, capacitor C15, crystal oscillator X501, optical coupler U9A, optical coupler U3B, transistor Q4, transistor Q5, chip U4, chip U6, connector SW, connector IND1 and connector IND2; The chip U4 includes a first pin, a second pin, a third pin, a fourth pin and a fifth pin; the first pin of the chip U4 is electrically connected to one end of the capacitor C6, the third pin of the chip U4 and the DRV_VCC of the emergency Boost circuit respectively; the second pin of the chip U4 and the other end of the capacitor C6 are both grounded; the fourth pin of the chip U4 is electrically connected to one end of the capacitor C35; the fifth pin of the chip U4 is electrically connected to one end of the capacitor C5, one end of the capacitor C27, one end of the capacitor C28, one end of the resistor R58, one end of the resistor R100, one end of the resistor R42, one end of the resistor R35 and the fourth pin of the chip U6 respectively; the other end of the resistor R58 is electrically connected to the capacitor C33 One end of the chip U6 is electrically connected to the sixth pin of the chip U6; the other end of the capacitor C35, the other end of the capacitor C5, the other end of the capacitor C27, the other end of the capacitor C28, the other end of the capacitor C33 and the fifth pin of the chip U6 are all grounded; the second pin of the chip U6 is electrically connected to one end of the crystal oscillator X501 and one end of the capacitor C24 respectively; the third pin of the chip U6 is electrically connected to the other end of the crystal oscillator X501 and one end of the capacitor C25 respectively; the other end of the capacitor C24 and the other end of the capacitor C25 are both grounded; the 30th pin of the chip U6 is electrically connected to one end of the capacitor C100, one end of the resistor R59 and the other end of the resistor R100 respectively; the other end of the capacitor C100 is grounded; The seventh pin of the chip U6 is electrically connected to the CHRG_CURR_SIG of the battery charging circuit; the ninth pin of the chip U6 is electrically connected to the LED_RLY_CRTL of the emergency Boost circuit; the tenth pin of the chip U6 is electrically connected to the BATT_VOLTAGE of the emergency Boost circuit; the eleventh pin of the chip U6 is electrically connected to the FDBK_LM3478 of the emergency Boost circuit; the twelfth pin of the chip U6 is electrically connected to the LED_VOLATAGE of the emergency Boost circuit; the thirteenth pin of the chip U6 is electrically connected to the DRV_EN of the emergency Boost circuit; the fourteenth pin of the chip U6 is electrically connected to the CHRG_CURR_SIG of the battery charging circuit _PWM_SIG is electrically connected; the fifteenth pin of the chip U6 is electrically connected to one end of the resistor R8; the other end of the resistor R8 is electrically connected to one end of the resistor R10 and the base of the transistor Q4 respectively; the collector of the transistor Q4 is electrically connected to one end of the resistor R4 and the connector IND1 respectively; the emitter of the transistor Q4 and the other end of the resistor R10 are both grounded; the sixteenth pin of the chip U6 is electrically connected to one end of the resistor R9; the other end of the resistor R9 is electrically connected to one end of the resistor R11 and the base of the transistor Q5 respectively; the collector of the transistor Q5 is electrically connected to one end of the resistor R5 and the connector IND2 respectively; the emitter of the transistor Q5 and the other end of the resistor R11 are both grounded;The seventeenth pin of the chip U6 is electrically connected to BOOST_EN of the emergency Boost circuit; the eighteenth pin of the chip U6 is electrically connected to one end of the optocoupler U9A; the other end of the optocoupler U9A is electrically connected to the other end of the resistor R42; the nineteenth pin of the chip U6 is electrically connected to one end of the optocoupler U3B, one end of the capacitor C15 and the other end of the resistor R35 respectively; the other end of the optocoupler U3B and the other end of the capacitor C15 are both grounded; the twenty-second pin of the chip U6 is electrically connected to one end of the resistor R108, one end of the resistor R109 and one end of the capacitor C34 respectively; the other end of the resistor R109 and the other end of the capacitor C34 are both grounded; the other end of the resistor R108 is electrically connected to the VCC power supply of the peripheral. ; 6. The LED constant power driving circuit with self-checking integrated with intelligent charging according to claim 1, characterized in that: The DALI communication circuit includes a resistor R26, a resistor R29, a resistor R15, a resistor R16, a resistor R23, a resistor R24, a resistor R12, a resistor R13, a resistor R17, a resistor R31, a resistor R36, a resistor R37, a resistor R40, a capacitor C2, a capacitor C8, a capacitor C10, a capacitor C11, a capacitor C17, a capacitor C18, a capacitor C14, a transistor Q7, a transistor Q10, a transistor Q8, a transistor Q15, a transistor Q16, a transistor Q17, an optical coupler U3A, an optical coupler U9B, a voltage-stabilizing diode DZ3, a rectifier bridge DB2, a varistor RV1, a fuse F2, a connector DALI1 and a connector DALI2; The first pin of the rectifier bridge DB2 is electrically connected to one end of the fuse F2 and one end of the varistor RV1 respectively; the other end of the fuse F2 is electrically connected to the connector DALI1; the second pin of the rectifier bridge DB2 is electrically connected to one end of the resistor R13, the other end of the varistor RV1 and the connector DALI2 respectively; the third pin of the rectifier bridge DB2 is electrically connected to one end of the resistor R12, one end of the capacitor C2, the collector of the transistor Q7, the emitter of the transistor Q8 and the collector of the transistor Q10 respectively; the fourth pin of the rectifier bridge DB2 is electrically connected to the other end of the capacitor C2, one end of the capacitor C8, the resistor R The base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, one end of the capacitor C17, one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 is electrically connected to the base of the transistor Q16, the other end of the resistor R31, the other end of the capacitor C11, the other end of the capacitor C18 and one end of the voltage zener diode DZ3; the base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, the other end of the capacitor C17, the one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 is electrically connected to the base of the transistor Q16, the other end of the resistor R31, the other end of the capacitor C11, the one end of the capacitor C18 and one end of the voltage zener diode DZ3; the base of the transistor Q7 is electrically connected to the other end of the capacitor C8, the other end of the resistor R26, the other end of the capacitor C17, the one end of the resistor R36 and one end of the optical coupler U9B; the emitter of the transistor Q7 is electrically connected to the other end of the capacitor C10, the other end of the resistor R29 and the base of the transistor Q10; the other end of the resistor R23 One end of the resistor R15 is electrically connected to one end of the resistor R15; the other end of the resistor R15 is electrically connected to one end of the resistor R16; the other end of the resistor R16 is electrically connected to one end of the resistor R24; the other end of the resistor R24 ​​is electrically connected to the collector of the transistor Q8 and the base of the transistor Q15 respectively; the other end of the resistor R12 is electrically connected to the base of the transistor Q8 and the emitter of the transistor Q15 respectively; the other end of the resistor R13 is electrically connected to one end of the resistor R17; the other end of the resistor R17 is electrically connected to the other end of the resistor R31, the other end of the capacitor C11 and the base of the transistor Q16 respectively; the transistor Q1 The collector of transistor Q6 is electrically connected to the collector of transistor Q15 and one end of optocoupler U3A respectively; the other end of the optocoupler U3A is electrically connected to the emitter of transistor Q17 and one end of capacitor C14 respectively; the base of transistor Q17 is electrically connected to the other end of capacitor C14 and the other end of zener diode DZ3 respectively; the collector of transistor Q17 is electrically connected to one end of resistor R40; the other end of resistor R40 is electrically connected to one end of resistor R37, the other end of capacitor C18 and the other end of capacitor C17 respectively; the other end of resistor R37 is electrically connected to the other end of resistor R36 and the other end of optocoupler U9B respectively.

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