Efficient multifunctional charger

Abstract

The utility model relates to the technical field of chargers, in particular to a high-efficiency multifunctional charger, which is internally provided with a circuit module, and the circuit module comprises a singlechip function module circuit, a singlechip power supply circuit, an LLC resonant converter circuit and a switching power supply main control chip circuit, the output end of the LLC resonant converter circuit is in signal connection with the input end of the single-chip microcomputer power supply circuit. The active power factor correction circuit comprises a rectifier bridge BD1, and a pin 2 and a pin 4 of the rectifier bridge BD1 are in signal connection with the LLC resonant converter circuit; lLC resonance spectrum extension is used for replacing traditionally used forward spectrum extension, the power supply conversion efficiency is improved, a single-chip microcomputer is used for writing a program, adaptation of batteries with different capacities and different battery voltages is achieved, the output power is reduced according to rising of the temperature of a charger, multiple kinds of charger protection are achieved, and the power supply conversion efficiency is improved. Energy conservation and carbon reduction can be achieved, and the trouble that different batteries need to use corresponding chargers is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a charger technical field especially relates to a kind of high-efficiency multifunctional charger. BACKGROUND

[0002] Small household appliance products and consumer electronics products generally use wall-plug type and desktop type lithium battery power charger, compared with desktop type lithium battery power charger, wall-plug type lithium battery power charger is smaller in size, and smaller in power.

[0003] The existing wall-plug type lithium battery power charger, due to the reason of small size, its function and internal structure design are relatively simple, its power control is not precise enough, energy-saving effect is not good, or it does not have constant-current constant-voltage charging function, and charging effect is not good, therefore, in the case of energy shortage advocating energy saving and environmental protection, wall-plug type lithium battery power charger giving consideration to small size, precise power control and good charging effect needs to be designed. UTILITY MODEL CONTENTS

[0004] The utility model aims at the deficiency of prior art to provide a kind of high-efficiency multifunctional charger.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A kind of high-efficiency multifunctional charger, it has circuit module inside, circuit module includes single-chip microcomputer function module circuit, single-chip microcomputer power supply circuit, LLC resonant converter circuit, switching power supply master control chip circuit, the output of LLC resonant converter circuit is connected with the input signal of single-chip microcomputer power supply circuit, the output of single-chip microcomputer power supply circuit is connected with the input signal of single-chip microcomputer function module circuit;The output of switching power supply master control chip circuit is connected with active power factor correction circuit, the output of active power factor correction circuit is connected with the input signal of LLC resonant converter circuit;

[0007] The switching power supply master control chip circuit includes controller chip U1, and the 2th pin, 3rd pin and 8th pin of U1 are connected with active power factor correction circuit signal;

[0008] The active power factor correction circuit includes rectifier bridge BD1, and the 2th pin and 4th pin of rectifier bridge BD1 are connected with LLC resonant converter circuit signal;

[0009] LLC resonant converter circuit includes primary circuit, transformer T2 and secondary circuit;

[0010] The primary side circuit includes inductor L3, capacitor C31, switch tube Q12, resistor R35, resistor R4, diode D24 and resistor R8; one end of inductor L3, resistor R35, diode D24 and resistor R8 are connected in series, wherein the positive electrode of diode D24 is connected with resistor R8, and the negative electrode of diode D24 is connected with resistor R35; resistor R4 is connected in parallel with diode D24; the other end of resistor R8 is connected to pin 9 of controller chip U1; the other end of inductor L3 is connected with transformer T2;

[0011] The secondary side circuit includes capacitor C13, capacitor C33, switch tube Q11, resistor R36, resistor R11, diode D22 and resistor R23; one end of capacitor C13, resistor R36, diode D22 and resistor R23 are connected in series, wherein the positive electrode of diode D22 is connected with resistor R36, and the negative electrode of diode D22 is connected with resistor R23; resistor R11 is connected in parallel with diode D22; the other end of resistor R23 is connected to pin 6 of controller chip U1; the other end of capacitor C13 is connected with transformer T2;

[0012] The source electrode of switch tube Q12 is connected with the drain electrode of switch tube Q11, the source electrode of switch tube Q11 is connected with capacitor C13, and the drain electrode of switch tube Q12 is connected with the primary side power factor correction circuit.

[0013] Further, the high-efficiency multifunctional charger circuit module further includes a power input noise filtering circuit, and the output end of the power input noise filtering circuit is connected to pin 1 and pin 3 of rectifier bridge BD1.

[0014] Further, the high-efficiency multifunctional charger power input noise filtering circuit includes transformer LF1 and transformer LF2, the output end of transformer LF1 is connected to the input end of transformer LF2, and the input end of transformer LF2 is connected to pin 1 and pin 3 of rectifier bridge BD1 of the power input noise filtering circuit.

[0015] Further, the high-efficiency multifunctional charger circuit module further includes a power voltage input detection circuit, the input end of the power voltage input detection circuit is connected with the output end of transformer LF1, and the output end of the power voltage input detection circuit is connected to pin 1 of controller chip U1.

[0016] Further, the model of controller chip U1 of the high-efficiency multifunctional charger is GATEPFC.

[0017] Further, the high-efficiency multifunctional charger circuit module further includes a charging current adjusting circuit, a charger output switch control circuit and a power indicator light circuit, and the single-chip microcomputer functional module circuit includes controller chip U2.

[0018] Further: the 1st pin and the 2nd pin of the high-efficiency multifunctional charger controller chip U2 are connected with the output end signal of the single-chip microcomputer power supply circuit; the 3rd pin and the 4th pin of the controller chip U2 are connected with the charging current adjusting circuit signal; the 5th pin and the 6th pin of the controller chip U2 are connected with the power indicator lamp circuit signal; the 7th pin and the 8th pin of the controller chip U2 are connected with the charger output switch control circuit signal.

[0019] Further: the single-chip microcomputer power supply circuit of the high-efficiency multifunctional charger includes a control chip U5, and the output end of the control chip U5 is connected with the input end signal of the controller chip U2.

[0020] The utility model discloses beneficial effects: circuit module includes single-chip microcomputer function module circuit, single-chip microcomputer power supply circuit, LLC resonant converter circuit, switching power supply master control chip circuit, uses LLC resonance spectrum to replace the positive active spectrum of traditional use, promotes the efficiency of power conversion, and adds the program of using single-chip microcomputer, realizes the adaptation of different capacity batteries, different battery voltage, and according to the rise of charger temperature, reduces the output power, and also has a variety of charger protection, can reach energy saving and carbon reduction and the trouble of different batteries to use corresponding charger. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the principle diagram of charger.

[0022] Figure 2 It is the circuit principle diagram of charger.

[0023] Figure 3 It is the partial enlarged view of circuit principle diagram.

[0024] Figure 4 It is the partial enlarged view of circuit principle diagram.

[0025] Figure 5 It is the circuit principle diagram of single-chip microcomputer function module circuit.

[0026] The attached drawing mark includes:

[0027] A-city power input noise filter circuit, B-city voltage input detection circuit,

[0028] C-voltage regulating signal input to chip circuit, D-chip power supply circuit,

[0029] E-power transistor power supply circuit, F-active power factor correction circuit,

[0030] G-LLC resonant converter circuit, H-resonant converter power limiting circuit,

[0031] I-switching power noise filter circuit of transformer, J-transformer rectifier circuit,

[0032] K-MCU power supply circuit, L-charger output switch circuit,

[0033] M-charger charging current signal detection circuit, N-charging voltage regulation circuit,

[0034] O-charger charging current signal amplification circuit, P-charging current regulation circuit,

[0035] Q-power indicator light circuit, R-charger output switch control circuit,

[0036] S-MCU function module circuit, T-switching power supply main control chip circuit. DETAILED DESCRIPTION

[0037] The utility model is described in detail below in combination with the drawings.

[0038] As Figures 1-5 shown, a high-efficiency multifunctional charger has internal circuit modules, which include an MCU function module circuit S, an MCU power supply circuit K, an LLC resonant converter circuit G, and a switching power supply main control chip circuit T.

[0039] The output end of the LLC resonant converter circuit G is in signal connection with the input end of the MCU power supply circuit K, and the output end of the MCU power supply circuit K is in signal connection with the input end of the MCU function module circuit S. The output end of the switching power supply main control chip circuit T is in signal connection with a positive active power factor correction circuit F, and the output end of the positive active power factor correction circuit F is in signal connection with the input end of the LLC resonant converter circuit G. The switching power supply main control chip circuit T includes a controller chip U1, the 2th pin, the 3th pin, and the 8th pin of which are in signal connection with the positive active power factor correction circuit F. The positive active power factor correction circuit F includes a rectifier bridge BD1, the 2th pin and the 4th pin of which are in signal connection with the LLC resonant converter circuit G.

[0040] The LLC resonant converter circuit G includes a primary side circuit, a transformer T2, and a secondary side circuit.

[0041] The primary side circuit includes an inductor L3, a capacitor C31, a switch Q12, a resistor R35, a resistor R4, a diode D24, and a resistor R8. One end of the inductor L3, the resistor R35, the diode D24, and the resistor R8 are connected in series, with the anode of the diode D24 connected to the resistor R8 and the cathode of the diode D24 connected to the resistor R35. The resistor R4 is connected in parallel to the diode D24. The other end of the resistor R8 is connected to the 9th pin of the controller chip U1. The other end of the inductor L3 is connected to the transformer T2.

[0042] The secondary side circuit includes a capacitor C13, a capacitor C33, a switch tube Q11, a resistor R36, a resistor R11, a diode D22 and a resistor R23; one end of the capacitor C13, the resistor R36, the diode D22 and the resistor R23 are connected in series, wherein the positive electrode of the diode D22 is connected with the resistor R36, and the negative electrode of the diode D22 is connected with the resistor R23; the resistor R11 is connected in parallel with the diode D22; the other end of the resistor R23 is connected to the 6th pin of the controller chip U1; the other end of the capacitor C13 is connected with the transformer T2;

[0043] The source electrode of the switch tube Q12 is connected with the drain electrode of the switch tube Q11, the source electrode of the switch tube Q11 is connected with the capacitor C13, and the drain electrode of the switch tube Q12 is connected with the active power factor correction circuit.

[0044] The LLC resonance spectrum is used to replace the traditional forward spectrum, the efficiency of power conversion is improved, and the program is written by using the single-chip microcomputer, different capacity batteries, different battery voltages are adapted, the output power is reduced according to the temperature rise of the charger, and various charger protections can be achieved, so that energy saving and carbon reduction can be achieved, and the trouble of using corresponding chargers for different batteries can be avoided.

[0045] Specifically, the circuit module further includes a power input noise filtering circuit A, and the output end of the power input noise filtering circuit A is connected to the 1st pin and the 3rd pin of the rectifier bridge BD1, thereby completing the signal connection between the power input noise filtering circuit A and the active power factor correction circuit F.

[0046] Specifically, the power input noise filtering circuit A includes a transformer LF1 and a transformer LF2, the output end of the transformer LF1 is connected to the input end of the transformer LF2, and the input end of the transformer LF2 is connected to the 1st pin and the 3rd pin of the rectifier bridge BD1 of the power input noise filtering circuit A; the circuit module further includes a power voltage input detection circuit B, the input end of the power voltage input detection circuit B is connected with the output end of the transformer LF1 in signal connection, and the output end of the power voltage input detection circuit B is connected to the 1st pin of the controller chip U1. In the battery charger, the rectifier bridge is used to convert the power into direct current suitable for battery charging. Different types of batteries have different requirements for charging voltage and current, and the circuit after the rectifier bridge can be adjusted according to the characteristics of the battery, such as setting appropriate charging current limit and charging termination voltage.

[0047] The model of the controller chip U1 is GATEPFC.

[0048] The circuit module further includes a charging current adjusting circuit P, a charger output switch control circuit R and a power indicator lamp circuit Q, and the single-chip microcomputer functional module circuit S includes a controller chip U2.

[0049] The 1st pin, 13th pin, 14th pin, 17th pin, 18th pin, 19th pin of the controller chip U2 are respectively connected with the pins of the cable P2, wherein the 1st pin of U2 is connected with the 7th pin of the cable P2, the 13th pin of U2 is connected with the 3rd pin of the cable P2; the 14th pin of U2 is connected with the 4th pin of the cable P2; the 17th pin of U2 is connected with the 5th pin of the cable P2; the 18th pin of U2 is connected with the 6th pin of the cable P2; the 19th pin of U2 is connected with the 8th pin of the cable P2.

[0050] The cable P2 is connected with the cable P1, the 1st pin and the 2nd pin of the cable P1 are connected with the output end of the single-chip microcomputer power supply circuit K, the 3rd pin and the 4th pin of the cable P1 are connected with the charging current adjusting circuit P, the 5th pin and the 6th pin of the cable P1 are connected with the power indicator lamp circuit Q, the 7th pin and the 8th pin of the cable P1 are connected with the charger output switch control circuit R, so as to realize the circuit control of the single-chip microcomputer power supply circuit K. The single-chip microcomputer power supply circuit K comprises a control chip U5, the output end of the control chip U5 is connected with the input end of the controller chip U2, specifically, the 2nd pin of the control chip U5 is connected with a 3.3V power supply, the other end is connected with a capacitor C41, the capacitor C41 is connected with a power supply ground, and the signal connection of the cables P1 and P2 is realized, so as to realize the power supply of the single-chip microcomputer function module circuit S.

[0051] The circuit module further comprises a voltage regulating signal input to a chip circuit C, a chip power supply circuit D, a power transistor power supply circuit E and a resonant converter power limiting circuit H, wherein the voltage regulating signal input to the chip circuit C is connected to the 16th pin of the controller chip U1, the chip power supply circuit D is connected to the 17th pin of the controller chip U1, the power transistor power supply circuit E is connected to the 11th pin and the 20th pin of the controller chip U1, and the resonant converter power limiting circuit H is connected to the 14th pin and the 15th pin of the controller chip U1.

[0052] The circuit module further comprises a noise filter circuit I of a transformer in a switching power supply, a transformer rectifier circuit J and a charger output switch circuit L, the output end of the LLC resonant converter circuit G is connected with the input end of the transformer rectifier circuit J, the output end of the transformer rectifier circuit J is connected with the input end of the noise filter circuit I of the transformer in the switching power supply, the output end of the noise filter circuit I of the transformer in the switching power supply is connected with the input end of the LLC resonant converter circuit G. The output end of the transformer rectifier circuit J is connected with the input end of the charger output switch circuit L.

[0053] The output end of the charger output switch circuit L is connected with a charger charging current signal detection circuit M, which is connected in a signal connection mode, the output end of the charger charging current signal detection circuit M is connected with a charger charging current signal amplification circuit O; the output end of the charger charging current signal amplification circuit O is connected with a charging current regulating circuit P; the output end of the charging current regulating circuit P is connected with the charging voltage regulating circuit N in a signal connection mode, and the output end of the transformer rectifier circuit J is connected with the charging voltage regulating circuit N in a signal connection mode.

[0054] The capacitor CY1 of the noise filter circuit I is connected with a signal ground, the capacitor CY2 is connected with a power ground, the capacitor C30 is connected with a ground at both ends, the 11th and 12th pins of the controller chip U2 are connected with the 3rd and 4th pins of the flat cable P3, the 1st pin of the flat cable P3 is connected with a 3.3V power supply, and the 2nd pin of the flat cable P3 is connected with a power ground.

[0055] It should be noted that the signal ground, the power ground and the ground signal in the circuit module are the same circuit source.

[0056] As can be seen from the above, the utility model has the excellent characteristics described above, and can improve the performance of the prior art and has practicality, becoming a product with high practical value.

[0057] The above content is only the preferred embodiment of the utility model, and for the ordinary skilled in the art, according to the idea of the utility model, the specific implementation mode and the application range can be changed, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A high-efficiency multifunctional charger, characterized by: It has a circuit module inside, which includes a single-chip microcomputer function module circuit, a single-chip microcomputer power supply circuit, an LLC resonant converter circuit, and a switching power supply main control chip circuit. The output end of the LLC resonant converter circuit is signal-connected to the input end of the single-chip microcomputer power supply circuit, and the output end of the single-chip microcomputer power supply circuit is signal-connected to the input end of the single-chip microcomputer function module circuit; the output end of the switching power supply main control chip circuit is signal-connected to an active power factor correction circuit, and the output end of the active power factor correction circuit is signal-connected to the input end of the LLC resonant converter circuit; The switching power supply main control chip circuit includes a controller chip U1, whose pins 2, 3 and 8 are all connected to the active power factor correction circuit signal; The active power factor correction circuit includes a rectifier bridge BD1, and pins 2 and 4 of the rectifier bridge BD1 are connected to the LLC resonant converter circuit signal; The LLC resonant converter circuit includes a primary circuit, a transformer T2 and a secondary circuit; The primary circuit includes inductor L3, capacitor C31, switch Q12, resistor R35, resistor R4, diode D24, and resistor R8. One end of inductor L3, resistor R35, diode D24, and resistor R8 are connected in series, with the anode of diode D24 connected to resistor R8 and the cathode of diode D24 connected to resistor R35. Resistor R4 is connected in parallel with diode D24. The other end of resistor R8 is connected to pin 9 of controller chip U1. The other end of inductor L3 is connected to transformer T2. The secondary circuit includes capacitors C13 and C33, a switch Q11, resistors R36 and R11, a diode D22, and a resistor R23. One end of capacitor C13, resistor R36, diode D22, and resistor R23 are connected in series, with the anode of diode D22 connected to resistor R36 and the cathode of diode D22 connected to resistor R23. Resistor R11 is connected in parallel with diode D22. The other end of resistor R23 is connected to pin 6 of controller chip U1. The other end of capacitor C13 is connected to transformer T2. The source of the switch tube Q12 is connected to the drain of the switch tube Q11 , the source of the switch tube Q11 is connected to the capacitor C13 , and the drain of the switch tube Q12 is connected to the active power factor correction circuit.

2. The high-efficiency multifunctional charger according to claim 1, characterized in that: The circuit module further includes a mains input noise filter circuit, the output end of which is connected to pins 1 and 3 of the rectifier bridge BD1.

3. The high-efficiency multifunctional charger according to claim 2, characterized in that: The mains input noise filter circuit includes a transformer LF1 and a transformer LF2. The output end of the transformer LF1 is connected to the input end of the transformer LF2. The input end of the transformer LF2 is connected to pins 1 and 3 of the rectifier bridge BD1 of the mains input noise filter circuit.

4. The high-efficiency multifunctional charger according to claim 3, characterized in that: The circuit module further includes a mains voltage input detection circuit, the input end of which is signal-connected to the output end of the transformer LF1 , and the output end of which is connected to pin 1 of the controller chip U1 .

5. The high-efficiency multifunctional charger according to claim 4, characterized in that: The model of the controller chip U1 is GATEPFC.

6. The high-efficiency multifunctional charger according to claim 5, characterized in that: The circuit module also includes a charging current regulating circuit, a charger output switch control circuit and a power indicator light circuit, and the single chip microcomputer function module circuit includes a controller chip U2.

7. The high-efficiency multifunctional charger according to claim 6, characterized in that: Pins 1 and 2 of the controller chip U2 are connected to the output end signal of the single-chip microcomputer power supply circuit; pins 3 and 4 of the controller chip U2 are connected to the charging current regulation circuit signal; pins 5 and 6 of the controller chip U2 are connected to the power indicator light circuit signal; pins 7 and 8 of the controller chip U2 are connected to the charger output switch control circuit signal.

8. The high-efficiency multifunctional charger according to claim 7, characterized in that: The single chip microcomputer power supply circuit includes a control chip U5 , and an output terminal of the control chip U5 is signal-connected to an input terminal of the controller chip U2 .

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