Constant-voltage and constant-current charger circuit with lamp turning function

Abstract

The utility model relates to the technical field of chargers, and discloses a constant-voltage and constant-current charger circuit with a lamp turning function, which comprises an EMC (Electro Magnetic Compatibility) filter circuit, a flyback conversion circuit, a constant-voltage and constant-current control circuit, a lamp turning control circuit and an output circuit, the output end of the EMC filter circuit is connected with the input end of the flyback conversion circuit, the output end of the flyback conversion circuit is connected with the input end of the constant-voltage and constant-current control circuit and the input end of the output circuit, and the output end of the constant-voltage and constant-current control circuit is connected with the input end of the lamp turning control circuit. By adopting the EMC filter circuit, the flyback conversion circuit, the constant-voltage and constant-current control circuit, the lamp turning control circuit and the output circuit, the cost can be reduced, the development difficulty can be simplified, the effective multi-stage floating charge and the like can be realized, the constant-voltage and constant-current can realize large-current quick charging, the battery charging time can be shortened, and the battery charging efficiency can be improved. The floating-charge rotary lamp control circuit enables the battery to be fully charged and enables people to see the fully charged state through the rotary lamp.

Description

Technical Field

[0001] The utility model relates to the technical field of chargers, in particular to a constant-voltage and constant-current charger circuit with a lamp-turning function. Background Art

[0002] The charger is a charging device that uses high-frequency power supply technology and advanced intelligent dynamic adjustment charging technology. Currently, widely used portable products such as mobile phones, laptops, portable power tools, etc. are equipped with chargers.

[0003] For chargers on the market, many chargers do not have floating charge function, so they cannot be fully charged during charging, which will result in less battery energy storage. Although they have been charged for a long time, they are still not durable. The reason is that the battery is not fully charged, resulting in low battery utilization. There are also many chargers that are controlled by MCU chips. Although more levels of refined management can be achieved, the cost is relatively high, and it is also difficult to develop, and it is time-consuming and labor-intensive. In addition, if the corresponding MCU chip control is not used, the battery cannot be fully utilized.

[0004] Therefore, in view of the above problems, the existing charging method needs to be further improved. Utility Model Content

[0005] The purpose of the utility model is to overcome the problems of existing chargers, such as high cost, great development difficulty, time-consuming and labor-intensive, no floating charge function, and inability to fully charge the rechargeable battery. By rationalizing the design of the charger circuit, using the EMC filter circuit, flyback conversion circuit, constant voltage and constant current control circuit, rotating light control circuit and output circuit to cooperate with each other, constant current and constant voltage charging can be achieved, with floating charge function, time-saving and labor-saving development, cost reduction and ensuring full battery, etc.; its constant voltage and constant current can achieve fast charging with large current, can shorten the battery charging time as much as possible, the floating charge rotating light control circuit allows the battery to be fully charged and the rotating light allows everyone to see the corresponding full state, etc.

[0006] The technical solution of the utility model is as follows:

[0007] A constant voltage and constant current charger circuit with a rotating light function, the charger circuit comprising: an EMC filter circuit, a flyback conversion circuit, a constant voltage and constant current control circuit, a rotating light control circuit and an output circuit, the power input end of the EMC filter circuit is connected to an external AC power supply, the output end of the EMC filter circuit is connected to the input end of the flyback conversion circuit, the output end of the flyback conversion circuit is respectively connected to the input end of the constant voltage and constant current control circuit and the input end of the output circuit, and the output end of the constant voltage and constant current control circuit is connected to the input end of the rotating light control circuit;

[0008] Wherein, the constant voltage and constant current control circuit comprises a constant voltage control circuit and a constant current control circuit, the input end of the constant voltage control circuit is connected to the output end of the flyback conversion circuit, and the input end of the constant current control circuit is connected to the current output end of the constant voltage control circuit;

[0009] Wherein, the constant voltage control circuit includes a resistor R19, a diode D5, a capacitor EC5, a capacitor C6, a resistor R33, a resistor R32, an optocoupler C1A, a resistor R26, a capacitor C4, a capacitor C5, a resistor R22, a resistor R20, a voltage regulator U3, a resistor R23 and a resistor R24, one end of the resistor R19 is connected to the output end of the flyback conversion circuit, the other end of the resistor R19 is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected in parallel to one end of the capacitor EC5, one end of the capacitor C6 and one end of the resistor R33, the other end of the capacitor EC5 and the other end of the capacitor C6 are grounded, and the other end of the resistor R33 is connected to the optocoupler C1A "1" terminal and the The optical coupler C1A "2" terminal is connected to one end of the resistor R32, and the optical coupler C1A "2" terminal is connected to the input end of the constant current control circuit, the other end of the resistor R32 and one end of the resistor R26. The other end of the resistor R26 is connected in parallel to the capacitor C4, the capacitor C5 and the voltage regulator U3 "2" terminal. The other end of the capacitor C5 is connected to one end of the resistor R22. One end of the resistor R20 is connected to the output end of the flyback conversion circuit. The other end of the resistor R20 is connected in parallel to the other end of the capacitor C4, the other end of the resistor R22, one end of the resistor R24, one end of the resistor R23 and the input end of the rotating light control circuit. The voltage regulator U3 "3" terminal is grounded together with the other end of the resistor R24 ​​and the other end of the resistor R23.

[0010] Furthermore, the voltage regulator tube U3 is selected from TL431 voltage regulator tube.

[0011] Furthermore, the constant current control circuit includes an amplifier U2B, a capacitor C10, a capacitor C11, a resistor R43, a capacitor C9, a resistor R41, a resistor R38, a resistor R40, a resistor R39, a resistor R42 and a diode D7, wherein the positive electrode of the diode D7 is connected to the "2" terminal of the optical coupler C1A, the negative electrode of the diode D7 is connected to one end of the resistor R42, the other end of the resistor R42 is connected in parallel to one end of the capacitor C10, one end of the resistor R43 and the "7" terminal of the amplifier U2B, and the other end of the resistor R43 is connected to the "2" terminal of the optical coupler C1A. One end of the capacitor C11 is connected, and the other end of the capacitor C11 and the other end of the capacitor C10 are connected to one end of the capacitor C9, one end of the resistor R41 and the "6" terminal of the amplifier U2B. The other end of the capacitor C9 is grounded. The other end of the resistor R41 is connected to the sampling end of the output end of the flyback conversion circuit. The "5" terminal of the amplifier U2B is connected to one end of the resistor R40, one end of the resistor R39 and one end of the resistor R38. The other end of the resistor R40 and the other end of the resistor R39 are grounded. The resistor R38 is externally connected to an external DC power supply.

[0012] Further, the rotating light control circuit includes a capacitor C8, a resistor R44, a resistor RJ1, a resistor R37, a resistor R36, a voltage regulator U4, a capacitor C7, a resistor R29, a resistor R34, a resistor R35, an amplifier U2A, a resistor R27, a capacitor EC4, a resistor R28, a transistor Q1, a diode D6, a resistor R25, a resistor R30, a resistor R31 and an LED1, one end of the resistor R25 is connected to the other end of the resistor R20, the other end of the resistor R25 is connected to the positive electrode of the diode D6, the negative electrode of the diode D6 is connected in parallel to one end of the resistor R30 and the collector of the transistor Q1, the base of the transistor Q1 is connected in parallel to one end of the resistor R28, one end of the capacitor EC4 and one end of the resistor R27, the other end of the resistor R28, the other end of the capacitor EC4, one end of the resistor R31 and the emitter of the transistor Q1 are grounded, and the other ends of the resistor R31 and the resistor R30 are respectively connected to the The LED1 is described, and the other end of the resistor R27 is connected in parallel to the amplifier U2A "1" terminal and one end of the resistor R44. The other end of the resistor R44 is connected to the amplifier U2A "3" terminal, one end of the capacitor C8 and one end of the resistor R37. The other end of the capacitor C8 is grounded. The other end of the resistor R37 is connected to one end of the resistor RJ1. The other end of the resistor RJ1 is connected to the sampling end of the output end of the flyback conversion circuit. The amplifier U2A "2" terminal is connected in parallel to one end of the resistor R35, one end of the resistor R34 and one end of the resistor R29. The other end of the resistor R29 is connected to one end of the capacitor C7, one end of the resistor R36 and the voltage regulator U4 "1" terminal and "2" terminal. The voltage regulator U4 "3" terminal and the other end of the capacitor C7, the other end of the resistor R34 and the other end of the resistor R35 are grounded. The other end of the resistor R36 is connected to the auxiliary voltage end of the input end of the constant voltage control circuit.

[0013] Furthermore, the voltage regulator tube U4 is selected from TL431 voltage regulator tube.

[0014] Furthermore, the flyback conversion circuit includes a PWM control circuit, a transformer circuit and an output rectifier circuit, the output end of the EMC filter circuit is connected to the input end of the transformer circuit, and the output end of the transformer circuit is respectively connected to the input end of the PWM control circuit and the input end of the output rectifier circuit.

[0015] Furthermore, the transformer circuit includes a transformer TR1A and a transformer TR1B, the input end of the primary coil of the transformer TR1A is connected to the output end of the EMC filter circuit, the output end of the secondary coil of the transformer TR1A is respectively connected to the input end of the PWM control circuit and the input end of the output rectifier circuit, the primary coil of the transformer TR1A performs mutual inductance on the secondary coil of the transformer TR1B, and the output end of the secondary coil of the transformer TR1B is connected to the input end of the constant voltage control circuit.

[0016] Furthermore, the transformer circuit also includes a capacitor EC1, a resistor R5, a capacitor CC1, a capacitor CC2, a resistor R6, a resistor R7 and a diode D1, the "5" terminal of the transformer TR1A is connected in parallel to one end of the capacitor EC1, one end of the resistor R5, one end of the capacitor CC2, one end of the resistor R6, one end of the resistor R7 and the output end of the EMC filter circuit, the other end of the resistor R5 is connected to one end of the capacitor CC1, the other end of the capacitor EC1 and the other end of the capacitor CC1 are grounded, the "4" terminal of the transformer TR1A is connected in parallel to the positive electrode of the diode D1 and the other input end of the PWM control circuit, and the negative electrode of the diode D1 is connected in parallel to the other end of the capacitor CC2, the other end of the resistor R6 and the other end of the resistor R7.

[0017] Furthermore, the capacitor EC1 is a variable capacitor.

[0018] Furthermore, the PWM control circuit includes a chip U1, a resistor R9, a resistor R10, a diode D2, a resistor R8, a capacitor EC2, a capacitor C2, a resistor R11, a capacitor C1, a resistor R21, a capacitor C3, a resistor R12, an optocoupler C1B, a resistor R13, a resistor R14, a resistor R15 and a resistor R16, the chip U1 "1" terminal is connected to one end of the resistor R11, the other end of the resistor R11 is connected in parallel to one end of the capacitor C2, the chip U1 "2" terminal, one end of the capacitor EC2, the cathode of the diode D2 and one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R9, the other end of the resistor R9 is connected to the output end of the EMC filter circuit, the anode of the diode D2 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the "2" terminal of the transformer TR1A. , the other end of the capacitor C2 is grounded, the other end of the capacitor EC2 is grounded together with the chip U1 "7" terminal and the chip U1 "8" terminal, the chip U1 "3" terminal is connected to one end of the resistor R12, one end of the capacitor C3 and one end of the resistor R21, the other end of the resistor R12 is connected to the collector of the optocoupler C1B, the chip U1 "4" terminal is connected in parallel to one end of the resistor R13, one end of the resistor R14, one end of the resistor R15 and one end of the resistor R16, the other end of the resistor R13, the other end of the resistor R14, the other end of the resistor R15, the other end of the resistor R16, the other end of the resistor R21, the other end of the capacitor C3 and the emitter of the optocoupler C1B are grounded, the chip U1 "5" terminal and the chip U1 "6" terminal are connected to one end of the capacitor C1 and the transformer TR1A "4" terminal, and the other end of the capacitor C1 is grounded.

[0019] Furthermore, the capacitor EC2 is a variable capacitor.

[0020] Furthermore, the chip U1 is a CR5244 chip.

[0021] Furthermore, the output rectifier circuit includes a resistor R17, a resistor R18, a capacitor CC3, a diode D3 and a capacitor EC3, the "6" terminal of the transformer TR1A is commonly connected to one end of the resistor R17, one end of the resistor R18 and the positive electrode of the diode D3, the other end of the resistor R17 and the other end of the resistor R18 are commonly connected to one end of the capacitor CC3, the other end of the capacitor CC3 and the negative electrode of the diode D3 are commonly connected to one end of the capacitor EC3 and the input end of the output circuit, and the "7" terminal of the transformer TR1A and the other end of the capacitor EC3 are commonly grounded.

[0022] Furthermore, the capacitor EC3 is a variable capacitor.

[0023] Furthermore, the EMC filter circuit includes a fuse F1, a thermistor NTC1, a varistor VR1, a capacitor CX1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a mutual inductance LF1 and a bridge DB1, one end of the fuse F1 is connected to the live wire, the other end of the fuse F1 is connected to one end of the thermistor NTC1, the other end of the thermistor NTC1 is connected in parallel to one end of the varistor VR1, one end of the capacitor CX1, one end of the resistor R1, one end of the resistor R3 and the "2" terminal of the mutual inductance LF1, the The other end of the resistor R1 and the other end of the resistor R3 are connected to one end of the resistor R2 and one end of the resistor R4. The other end of the resistor R2, the other end of the resistor R4, the other end of the varistor VR1 and the other end of the capacitor CX1 are connected to the neutral line with the mutual inductance LF1 "3" terminal. The mutual inductance LF1 "1" terminal is connected to the bridge BD1 "1" terminal. The mutual inductance LF1 "4" terminal is connected to the bridge BD1 "2" terminal. The bridge BD1 "4" terminal is grounded. The bridge BD1 "3" terminal is connected to the input end of the flyback conversion circuit.

[0024] Furthermore, the output circuit includes a mutual inductance LF2, a diode D4 and a resistor RT1, the mutual inductance LF2 "4" terminal and the mutual inductance LF2 "1" terminal are respectively connected to the output end of the flyback conversion circuit, the mutual inductance LF2 "3" terminal is connected to the cathode of the diode D4 and the anode of the output end, the mutual inductance LF2 "2" terminal is commonly connected to the anode of the diode D4 and one end of the resistor RT1, and the other end of the resistor RT1 is connected to the cathode of the output.

[0025] Furthermore, the resistor RT1 is a variable resistor.

[0026] Furthermore, the amplifier U2A and / or the amplifier U2B selects an LM358 amplifier.

[0027] Beneficial Effects

[0028] The utility model rationally designs the charger circuit, adopts the cooperation of EMC filter circuit, flyback conversion circuit, constant voltage and constant current control circuit, rotating light control circuit and output circuit, can realize constant current and constant voltage charging, has effective multi-stage floating charge function, saves time and effort in development, reduces cost and ensures that the battery is fully charged, etc.; its constant voltage and constant current can realize fast charging with large current, can shorten the battery charging time as much as possible, the floating charge rotating light control circuit makes the battery fully charged and the rotating light allows everyone to see the corresponding full state, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The utility model is a structural schematic diagram of a constant voltage and constant current charger circuit with a rotating light function.

[0030] Figure 2The utility model is a schematic diagram of the principle of a constant voltage and constant current charger circuit with a rotating light function.

[0031] Figure numbers: 01, EMC filter circuit; 02, flyback conversion circuit; 03, constant voltage and constant current control circuit; 04, turn signal control circuit; 05, output circuit. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-Figure 2 As shown, the utility model provides a constant voltage and constant current charger circuit with a rotating light function, the charger circuit comprises: an EMC filter circuit 01, a flyback conversion circuit 02, a constant voltage and constant current control circuit 03, a rotating light control circuit 04 and an output circuit 05, the power input end of the EMC filter circuit 01 is connected to an external AC power supply, the output end of the EMC filter circuit 01 is connected to the input end of the flyback conversion circuit 02, the output end of the flyback conversion circuit 02 is respectively connected to the input end of the constant voltage and constant current control circuit 03 and the input end of the output circuit 05, and the output end of the constant voltage and constant current control circuit 03 is connected to the input end of the rotating light control circuit 04;

[0034] Among them, the constant voltage and constant current control circuit 03 includes a constant voltage control circuit and a constant current control circuit, the input end of the constant voltage control circuit is connected to the output end of the flyback conversion circuit 02, and the input end of the constant current control circuit is connected to the current output end of the constant voltage control circuit;

[0035] The flyback conversion circuit 02 includes a PWM control circuit, a transformer circuit and an output rectifier circuit. The output end of the EMC filter circuit 01 is connected to the input end of the transformer circuit. The output end of the transformer circuit is connected to the input end of the PWM control circuit and the input end of the output rectifier circuit respectively.

[0036] Specifically, the EMC filter circuit 01 includes a fuse F1, a thermistor NTC1, a varistor VR1, a capacitor CX1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a mutual inductance LF1 and a bridge DB1; the transformer circuit includes a transformer TR1A, a transformer TR1B, a capacitor EC1, a resistor R5, a capacitor CC1, a capacitor CC2, a resistor R6, a resistor R7 and a diode D1; the PWM control circuit includes a chip U1, a resistor R9, a resistor R10, a diode D2, a resistor R8, a capacitor EC2, a capacitor C2, a resistor R11, a capacitor C1, a resistor R21, a capacitor C3, a resistor R12, an optocoupler C1B, a resistor R13, a resistor R14, a resistor R15 and a resistor R16; the output rectifier circuit includes a resistor R17, a resistor R18, a capacitor CC3, a diode D3 and a capacitor EC3; the output circuit 05 includes a mutual inductance LF2, a diode D4 and a resistor RT1; the transformer The lamp control circuit 04 includes a capacitor C8, a resistor R44, a resistor RJ1, a resistor R37, a resistor R36, a voltage regulator U4, a capacitor C7, a resistor R29, a resistor R34, a resistor R35, an amplifier U2A, a resistor R27, a capacitor EC4, a resistor R28, a transistor Q1, a diode D6, a resistor R25, a resistor R30, a resistor R31 and LED1; the constant current control circuit includes an amplifier U2B, a capacitor C10, a capacitor C11, a Resistor R43, capacitor C9, resistor R41, resistor R38, resistor R40, resistor R39, resistor R42 and diode D7; the constant voltage control circuit includes resistor R19, diode D5, capacitor EC5, capacitor C6, resistor R33, resistor R32, optical coupler C1A, resistor R26, capacitor C4, capacitor C5, resistor R22, resistor R20, voltage regulator U3, resistor R23 and resistor R24; the charger circuit also includes resistor RL1;

[0037] Among them, one end of the fuse F1 on the EMC filter circuit 01 is connected to the live wire, the other end of the fuse F1 is connected to one end of the thermistor NTC1, the other end of the thermistor NTC1 is connected in parallel to one end of the varistor VR1, one end of the capacitor CX1, one end of the resistor R1, one end of the resistor R3 and the mutual inductance LF1 "2" terminal, the other end of the resistor R1 and the other end of the resistor R3 are commonly connected to one end of the resistor R2 and one end of the resistor R4, the other end of the resistor R2, the other end of the resistor R4, the other end of the varistor VR1 and the other end of the capacitor CX1 are commonly connected to the neutral line with the mutual inductance LF1 "3" terminal, the mutual inductance LF1 "1" terminal is connected to the bridge BD1 "1" terminal, the mutual inductance LF1 "4" terminal is connected to the bridge BD1 "2" terminal, the bridge BD1 "4" terminal is grounded, and the bridge BD1 "3" terminal is connected to the positive electrode of the capacitor EC1 of the transformer circuit in the flyback conversion circuit 02;

[0038] Among them, the transformer TR1A "5" terminal of the transformer circuit in the flyback conversion circuit 02 is connected in parallel to the positive electrode of the capacitor EC1, one end of the resistor R5, one end of the capacitor CC2, one end of the resistor R6, one end of the resistor R7 and the bridge BD1 "3" terminal of the EMC filter circuit 01, the other end of the resistor R5 is connected to one end of the capacitor CC1, the negative electrode of the capacitor EC1 and the other end of the capacitor CC1 are grounded in common, the transformer TR1A "4" terminal is connected in parallel to the positive electrode of the diode D1 and the chip U1 "5" terminal of the PWM control circuit, the negative electrode of the diode D1 is connected in parallel to the other end of the capacitor CC2, the other end of the resistor R6 and the other end of the resistor R7, and the capacitor EC1 selects a variable capacitor;

[0039] Among them, the chip U1 "1" terminal of the PWM control circuit is connected to one end of the resistor R11, and the other end of the resistor R11 is connected in parallel to one end of the capacitor C2, the chip U1 "2" terminal, the positive electrode of the capacitor EC2, the negative electrode of the diode D2 and one end of the resistor R10, the other end of the resistor R10 is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the bridge BD1 "3" terminal of the EMC filter circuit 01, the positive electrode of the diode D2 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the transformer TR1A "2" terminal, the other end of the capacitor C2 is grounded, the negative electrode of the capacitor EC2 is grounded together with the chip U1 "7" terminal and the chip U1 "8" terminal, and the chip U1 "3" terminal is connected to one end of the resistor R12, One end of capacitor C3 and one end of resistor R21, the other end of resistor R12 is connected to the collector of optocoupler C1B, the "4" terminal of chip U1 is connected in parallel to one end of resistor R13, one end of resistor R14, one end of resistor R15 and one end of resistor R16, the other end of resistor R13, the other end of resistor R14, the other end of resistor R15, the other end of resistor R16, the other end of resistor R21, the other end of capacitor C3 and the emitter of optocoupler C1B are grounded, the "5" terminal of chip U1 and the "6" terminal of chip U1 are connected to one end of capacitor C1 and the "4" terminal of transformer TR1A, the other end of capacitor C1 is grounded, the capacitor EC2 is selected as a variable capacitor, and the model of chip U1 is selected as CR5244 chip;

[0040] Among them, in the output rectifier circuit, the transformer TR1A "6" terminal is connected to one end of the resistor R17, one end of the resistor R18 and the positive electrode of the diode D3, the other end of the resistor R17 and the other end of the resistor R18 are connected to one end of the capacitor CC3, the other end of the capacitor CC3 and the negative electrode of the diode D3 are connected to the positive electrode of the capacitor EC3 and the mutual inductance LF2 "4" terminal of the output circuit 05, the transformer TR1A "7" terminal and the negative electrode of the capacitor EC3 are grounded, and the capacitor EC3 selects a variable capacitor;

[0041] Among them, the mutual inductance LF2 "1" terminal of the output circuit 05 is connected to the ground through the resistor RL1, the mutual inductance LF2 "3" terminal is connected to the cathode of the diode D4 and the anode of the output terminal, the mutual inductance LF2 "2" terminal is connected to the anode of the diode D4 and one end of the resistor RT1, and the other end of the resistor RT1 is connected to the cathode of the output, and the resistor RT1 is selected as a variable resistor;

[0042] Among them, one end of the resistor R19 of the constant voltage control circuit is connected to the transformer TR1B "8" terminal of the flyback conversion circuit 02, and the other end of the resistor R19 is connected to the positive electrode of the diode D5. The negative electrode of the diode D5 is connected in parallel to the positive electrode of the capacitor EC5, one end of the capacitor C6 and one end of the resistor R33. The negative electrode of the capacitor EC5, the other end of the capacitor C6 and the transformer TR1B "7" terminal are grounded in common. The other end of the resistor R33 is connected to the optocoupler C1A "1" terminal and one end of the resistor R32. The optocoupler C1A "2" terminal is connected to the positive electrode of the diode D7 of the constant current control circuit, the other end of the resistor R32 and one end of the resistor R26. The resistor The other end of R26 is connected in parallel to capacitor C4, capacitor C5 and terminal "2" of voltage regulator U3, the other end of capacitor C5 is connected to one end of resistor R22, one end of resistor R20 is connected to the positive electrode of capacitor EC3 of flyback conversion circuit 02, the other end of resistor R20 is connected in parallel to the other end of capacitor C4, the other end of resistor R22, one end of resistor R24, one end of resistor R23 and one end of resistor R25 of turn signal control circuit 04, terminal "3" of voltage regulator U3 and the other end of resistor R24 ​​and the other end of resistor R23 are grounded together; wherein, voltage regulator U3 is selected as TL431 voltage regulator, and capacitor EC5 is selected as variable capacitor;

[0043] Among them, the positive electrode of the diode D7 of the constant current control circuit is connected to the "2" terminal of the optocoupler C1A, the negative electrode of the diode D7 is connected to one end of the resistor R42, the other end of the resistor R42 is connected in parallel to one end of the capacitor C10, one end of the resistor R43 and the "7" terminal of the amplifier U2B, the other end of the resistor R43 is connected to one end of the capacitor C11, the other end of the capacitor C11 and the other end of the capacitor C10 are connected to one end of the capacitor C9, one end of the resistor R41 and the "6" terminal of the amplifier U2B, the other end of the capacitor C9 is grounded, the other end of the resistor R41 is connected to the other end of the resistor R37, the "5" terminal of the amplifier U2B is connected to one end of the resistor R40, one end of the resistor R39 and one end of the resistor R38, the other end of the resistor R40 and the other end of the resistor R39 are grounded, and the resistor R38 is externally connected to an external DC power supply (+2.5V);

[0044] Among them, one end of the resistor R25 of the turn signal control circuit 04 is connected to the other end of the resistor R20, the other end of the resistor R25 is connected to the positive electrode of the diode D6, the negative electrode of the diode D6 is connected in parallel to one end of the resistor R30 and the collector of the transistor Q1, the base of the transistor Q1 is connected in parallel to one end of the resistor R28, the positive electrode of the capacitor EC4 and one end of the resistor R27, the other end of the resistor R28, the negative electrode of the capacitor EC4, one end of the resistor R31 and the emitter of the transistor Q1 are grounded, the other ends of the resistor R31 and the resistor R30 are connected to LED1 respectively, the other end of the resistor R27 is connected in parallel to the amplifier U2A "1" terminal and one end of the resistor R44, the other end of the resistor R44 is connected to the amplifier U2A "3" terminal, the capacitor C8 and The first terminal of the amplifier U2A is connected to one end of the resistor R35, one end of the resistor R34 and one end of the resistor R29 in parallel, the other end of the resistor R29 is connected to one end of the capacitor C7, one end of the resistor R36 and the "1" terminal and "2" terminal of the voltage regulator U4, the "3" terminal of the voltage regulator U4 and the other end of the capacitor C7, the other end of the resistor R34 and the other end of the resistor R35 are grounded, and the other end of the resistor R36 is connected to the cathode of the diode D5; wherein, the voltage regulator U4 selects the TL431 voltage regulator, and the capacitor EC4 selects the variable capacitor;

[0045] Among them, amplifier U2A and / or amplifier U2B selects LM358 amplifier.

[0046] The specific implementation of the utility model is composed of an input EMC filter circuit, a flyback conversion circuit, an output rectifier circuit, a constant voltage and current control circuit, and a floating charge light control circuit. The front end BD1 is preceded by an input EMC filter circuit, which can prevent grid interference and suppress the interference of the switching power supply, preventing it from being transmitted to the AC end, thereby protecting the power supply and AC input in both directions. The flyback main power part adopts Qida's CR5244, which includes the main power tube, which can reduce the difficulty of circuit design and the difficulty of handling EMC. At the same time, the FB pin of the chip U1 With feedback, the corresponding duty cycle can be controlled by the output of the secondary, thereby achieving constant voltage and constant current; the rectifier end uses a Schottky diode for rectification, which can achieve unidirectional conductivity, thereby achieving rectification; after rectification, the current is sampled by the operational amplifier LM358, and the voltage is stabilized by the TL431 voltage regulator tube, thereby achieving a dual closed loop of constant voltage and constant current; when the output voltage is low, it will enter a constant current state, and when the output voltage increases, the current gradually decreases. When the current is small to a certain extent, it will enter the light-on process and the floating voltage charging process.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A constant voltage and constant current charger circuit with a lamp-turning function, characterized in that: The charger circuit comprises: an EMC filter circuit, a flyback conversion circuit, a constant voltage and constant current control circuit, a rotating light control circuit and an output circuit, wherein the power input end of the EMC filter circuit is connected to an external AC power supply, the output end of the EMC filter circuit is connected to the input end of the flyback conversion circuit, the output end of the flyback conversion circuit is respectively connected to the input end of the constant voltage and constant current control circuit and the input end of the output circuit, and the output end of the constant voltage and constant current control circuit is connected to the input end of the rotating light control circuit; Wherein, the constant voltage and constant current control circuit comprises a constant voltage control circuit and a constant current control circuit, the input end of the constant voltage control circuit is connected to the output end of the flyback conversion circuit, and the input end of the constant current control circuit is connected to the current output end of the constant voltage control circuit; Wherein, the constant voltage control circuit includes a resistor R19, a diode D5, a capacitor EC5, a capacitor C6, a resistor R33, a resistor R32, an optocoupler C1A, a resistor R26, a capacitor C4, a capacitor C5, a resistor R22, a resistor R20, a voltage regulator U3, a resistor R23 and a resistor R24, one end of the resistor R19 is connected to the output end of the flyback conversion circuit, the other end of the resistor R19 is connected to the positive electrode of the diode D5, the negative electrode of the diode D5 is connected in parallel to one end of the capacitor EC5, one end of the capacitor C6 and one end of the resistor R33, the other end of the capacitor EC5 and the other end of the capacitor C6 are grounded, and the other end of the resistor R33 is connected to the "1" terminal of the optocoupler C1A and the The optical coupler C1A "2" terminal is connected to one end of the resistor R32, and the optical coupler C1A "2" terminal is connected to the input end of the constant current control circuit, the other end of the resistor R32 and one end of the resistor R26. The other end of the resistor R26 is connected in parallel to the capacitor C4, the capacitor C5 and the voltage regulator U3 "2" terminal. The other end of the capacitor C5 is connected to one end of the resistor R22. One end of the resistor R20 is connected to the output end of the flyback conversion circuit. The other end of the resistor R20 is connected in parallel to the other end of the capacitor C4, the other end of the resistor R22, one end of the resistor R24, one end of the resistor R23 and the input end of the rotating light control circuit. The voltage regulator U3 "3" terminal is grounded together with the other end of the resistor R24 ​​and the other end of the resistor R23.

2. A constant voltage and constant current charger circuit with a rotating light function according to claim 1, characterized in that: The constant current control circuit includes an amplifier U2B, a capacitor C10, a capacitor C11, a resistor R43, a capacitor C9, a resistor R41, a resistor R38, a resistor R40, a resistor R39, a resistor R42 and a diode D7, wherein the positive electrode of the diode D7 is connected to the "2" terminal of the optical coupler C1A, the negative electrode of the diode D7 is connected to one end of the resistor R42, the other end of the resistor R42 is connected in parallel to one end of the capacitor C10, one end of the resistor R43 and the "7" terminal of the amplifier U2B, and the other end of the resistor R43 is connected to the "2" terminal of the optical coupler C1A. One end of the capacitor C11, the other end of the capacitor C11 and the other end of the capacitor C10 are connected to one end of the capacitor C9, one end of the resistor R41 and the "6" terminal of the amplifier U2B, the other end of the capacitor C9 is grounded, the other end of the resistor R41 is connected to the sampling end of the output end of the flyback conversion circuit, the "5" terminal of the amplifier U2B is connected to one end of the resistor R40, one end of the resistor R39 and one end of the resistor R38, the other end of the resistor R40 and the other end of the resistor R39 are grounded, and the resistor R38 is externally connected to an external DC power supply.

3. A constant voltage and constant current charger circuit with a rotating light function according to claim 1, characterized in that: The rotating light control circuit includes capacitor C8, resistor R44, resistor RJ1, resistor R37, resistor R36, voltage regulator U4, capacitor C7, resistor R29, resistor R34, resistor R35, amplifier U2A, resistor R27, capacitor EC4, resistor R28, transistor Q1, diode D6, resistor R25, resistor R30, resistor R31 and LED1, one end of the resistor R25 is connected to the other end of the resistor R20, the other end of the resistor R25 is connected to the positive electrode of diode D6, the negative electrode of diode D6 is connected in parallel to one end of the resistor R30 and the collector of transistor Q1, the base of transistor Q1 is connected in parallel to one end of the resistor R28, one end of the capacitor EC4 and one end of the resistor R27, the other end of the resistor R28, the other end of the capacitor EC4, one end of the resistor R31 and the emitter of transistor Q1 are grounded, and the other ends of the resistor R31 and the resistor R30 are connected to the L ED1, the other end of the resistor R27 is connected in parallel to the amplifier U2A "1" terminal and one end of the resistor R44, the other end of the resistor R44 is connected to the amplifier U2A "3" terminal, one end of the capacitor C8 and one end of the resistor R37, the other end of the capacitor C8 is grounded, the other end of the resistor R37 is connected to one end of the resistor RJ1, the other end of the resistor RJ1 is connected to the sampling end of the output end of the flyback conversion circuit, the amplifier U2A "2" terminal is connected in parallel to one end of the resistor R35, one end of the resistor R34 and one end of the resistor R29, the other end of the resistor R29 is connected to one end of the capacitor C7, one end of the resistor R36 and the voltage regulator U4 "1" terminal and "2" terminal, the voltage regulator U4 "3" terminal and the other end of the capacitor C7, the other end of the resistor R34 and the other end of the resistor R35 are grounded, and the other end of the resistor R36 is connected to the auxiliary voltage end of the input end of the constant voltage control circuit.

4. A constant voltage and constant current charger circuit with a rotating light function according to claim 1, characterized in that: The flyback conversion circuit includes a PWM control circuit, a transformer circuit and an output rectifier circuit. The output end of the EMC filter circuit is connected to the input end of the transformer circuit, and the output end of the transformer circuit is respectively connected to the input end of the PWM control circuit and the input end of the output rectifier circuit.

5. A constant voltage and constant current charger circuit with a rotating light function according to claim 4, characterized in that: The transformer circuit includes a transformer TR1A and a transformer TR1B, the input end of the primary coil of the transformer TR1A is connected to the output end of the EMC filter circuit, the output end of the secondary coil of the transformer TR1A is respectively connected to the input end of the PWM control circuit and the input end of the output rectifier circuit, the primary coil of the transformer TR1A performs mutual inductance on the secondary coil of the transformer TR1B, and the output end of the secondary coil of the transformer TR1B is connected to the input end of the constant voltage control circuit.

6. A constant voltage and constant current charger circuit with a rotating light function according to claim 5, characterized in that: The transformer circuit also includes a capacitor EC1, a resistor R5, a capacitor CC1, a capacitor CC2, a resistor R6, a resistor R7 and a diode D1. The "5" terminal of the transformer TR1A is connected in parallel to one end of the capacitor EC1, one end of the resistor R5, one end of the capacitor CC2, one end of the resistor R6, one end of the resistor R7 and the output end of the EMC filter circuit. The other end of the resistor R5 is connected to one end of the capacitor CC1. The other end of the capacitor EC1 and the other end of the capacitor CC1 are grounded in common. The "4" terminal of the transformer TR1A is connected in parallel to the positive electrode of the diode D1 and the other input end of the PWM control circuit. The negative electrode of the diode D1 is connected in parallel to the other end of the capacitor CC2, the other end of the resistor R6 and the other end of the resistor R7.

7. A constant voltage and constant current charger circuit with a rotating light function according to claim 5, characterized in that: The PWM control circuit includes a chip U1, a resistor R9, a resistor R10, a diode D2, a resistor R8, a capacitor EC2, a capacitor C2, a resistor R11, a capacitor C1, a resistor R21, a capacitor C3, a resistor R12, an optocoupler C1B, a resistor R13, a resistor R14, a resistor R15 and a resistor R16. The "1" terminal of the chip U1 is connected to one end of the resistor R11, and the other end of the resistor R11 is connected in parallel to one end of the capacitor C2, the "2" terminal of the chip U1, one end of the capacitor EC2, the cathode of the diode D2 and one end of the resistor R10. The other end of the resistor R10 is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to the output end of the EMC filter circuit. The anode of the diode D2 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the "2" terminal of the transformer TR1A. The other end of the capacitor C2 is grounded, the other end of the capacitor EC2 is grounded together with the chip U1 "7" terminal and the chip U1 "8" terminal, the chip U1 "3" terminal is connected to one end of the resistor R12, one end of the capacitor C3 and one end of the resistor R21, the other end of the resistor R12 is connected to the collector of the optocoupler C1B, the chip U1 "4" terminal is connected in parallel to one end of the resistor R13, one end of the resistor R14, one end of the resistor R15 and one end of the resistor R16, the other end of the resistor R13, the other end of the resistor R14, the other end of the resistor R15, the other end of the resistor R16, the other end of the resistor R21, the other end of the capacitor C3 and the emitter of the optocoupler C1B are grounded together, the chip U1 "5" terminal and the chip U1 "6" terminal are connected to one end of the capacitor C1 and the transformer TR1A "4" terminal, and the other end of the capacitor C1 is grounded.

8. The constant voltage and constant current charger circuit with a rotating light function according to claim 5, characterized in that: The output rectifier circuit includes a resistor R17, a resistor R18, a capacitor CC3, a diode D3 and a capacitor EC3. The "6" terminal of the transformer TR1A is connected to one end of the resistor R17, one end of the resistor R18 and the positive electrode of the diode D3. The other end of the resistor R17 and the other end of the resistor R18 are connected to one end of the capacitor CC3. The other end of the capacitor CC3 and the negative electrode of the diode D3 are connected to one end of the capacitor EC3 and the input end of the output circuit. The "7" terminal of the transformer TR1A and the other end of the capacitor EC3 are grounded.

9. The constant voltage and constant current charger circuit with a rotating light function according to claim 1, characterized in that: The EMC filter circuit includes a fuse F1, a thermistor NTC1, a varistor VR1, a capacitor CX1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a mutual inductance LF1 and a bridge DB1. One end of the fuse F1 is connected to a live wire, and the other end of the fuse F1 is connected to one end of the thermistor NTC1. The other end of the thermistor NTC1 is connected in parallel to one end of the varistor VR1, one end of the capacitor CX1, one end of the resistor R1, one end of the resistor R3 and a "2" terminal of the mutual inductance LF1. The other end of R1 and the other end of resistor R3 are connected to one end of resistor R2 and one end of resistor R4. The other end of resistor R2, the other end of resistor R4, the other end of varistor VR1 and the other end of capacitor CX1 are connected to the neutral line with the mutual inductance LF1"3" terminal. The mutual inductance LF1"1" terminal is connected to the bridge BD1"1" terminal. The mutual inductance LF1"4" terminal is connected to the bridge BD1"2" terminal. The bridge BD1"4" terminal is grounded. The bridge BD1"3" terminal is connected to the input end of the flyback conversion circuit.

10. A constant voltage and constant current charger circuit with a rotating light function according to claim 1, characterized in that: The output circuit includes a mutual inductance LF2, a diode D4 and a resistor RT1, the mutual inductance LF2 "4" terminal and the mutual inductance LF2 "1" terminal are respectively connected to the output end of the flyback conversion circuit, the mutual inductance LF2 "3" terminal is connected to the cathode of the diode D4 and the anode of the output end, the mutual inductance LF2 "2" terminal is commonly connected to the anode of the diode D4 and one end of the resistor RT1, and the other end of the resistor RT1 is connected to the cathode of the output.

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