Charging circuit

Abstract

The utility model discloses a voltage-stabilizing and current-stabilizing circuit which comprises a ballasting and filtering module, a circuit switching piece, a voltage-stabilizing and current-stabilizing module and a linear voltage-stabilizing module. The ballast filtering module is electrically connected with the input end of the line switching piece, the first output end of the line switching piece is electrically connected with the input end of the voltage and current stabilizing module, and the second output end of the line switching piece is electrically connected with the input end of the linear voltage stabilizing module; the ballast filtering module is used for accessing a power supply source. According to the utility model, input electric signals are rectified and filtered by the ballasting and filtering module at the preceding stage to realize alternating current and direct current conversion, and stable output is obtained by combining the voltage stabilization processing of the backward stage of the circuit, so that the power supply safety is ensured; meanwhile, the voltage-stabilizing and current-stabilizing module or the linear voltage-stabilizing module can be correspondingly selected to output by utilizing the circuit switching piece, so that the requirements of different application scenes are met.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a charging circuit. Background Art

[0002] In order to save costs and volume, some charging circuits that convert mechanical energy into electrical energy usually ignore stable current and voltage output. This will cause the load to work abnormally or degrade performance, affecting the user experience, posing a threat to the safety of load use, and shortening the service life of the load. In addition, as the application scenarios become more complex, users' power supply needs are also increasing. If the charging circuit blindly reduces costs, it is easy to lose competitiveness. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a charging circuit, which provides a stable and safe output and meets different power supply requirements.

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

[0005] A charging circuit includes a ballast filter module, a line switch, a voltage and current stabilization module, and a linear voltage stabilization module;

[0006] The ballast filter module is electrically connected to the input end of the circuit switch, the first output end of the circuit switch is electrically connected to the input end of the voltage and current stabilization module, and the second output end of the circuit switch is electrically connected to the input end of the linear voltage stabilization module;

[0007] The ballast filter module is used to access a power supply source.

[0008] Further, the ballast filter module includes a bridge rectifier component;

[0009] The output end of the bridge rectifier assembly is electrically connected to the input end of the circuit switching element;

[0010] The input end of the bridge rectifier component is used to access a power supply source.

[0011] Furthermore, the ballast filter module further includes a first capacitor and a second capacitor;

[0012] The positive electrode of the first capacitor and the positive electrode of the second capacitor are both electrically connected to the output end of the bridge rectifier assembly;

[0013] The ground terminal of the bridge rectifier component, the negative electrode of the first capacitor and the negative electrode of the second capacitor are grounded in common.

[0014] Furthermore, the voltage and current stabilization module includes a power management chip, a third capacitor, a fourth capacitor and a first resistor;

[0015] The power supply end of the power management chip is electrically connected to the first output end of the circuit switch and one end of the third capacitor at the same time, the battery end of the power management chip is electrically connected to one end of the fourth capacitor, and the programmable constant current setting end of the power management chip is electrically connected to one end of the first resistor;

[0016] A ground terminal of the power management chip, the other end of the third capacitor, the other end of the fourth capacitor, and the other end of the first resistor are all grounded.

[0017] Furthermore, the voltage and current stabilization module further includes a second resistor and a first indicator light;

[0018] One end of the second resistor is electrically connected to the power supply end of the power management chip, the other end of the second resistor is electrically connected to the positive electrode of the first indicator light, and the negative electrode of the first indicator light is electrically connected to the charging completion indication end of the power management chip.

[0019] Furthermore, the voltage and current stabilization module further includes a third resistor and a second indicator light;

[0020] The positive electrode of the second indicator light is electrically connected to the first output end of the circuit switching element through the third resistor, and the negative electrode of the second indicator light is electrically connected to the charging indication end of the power management chip.

[0021] Furthermore, the circuit switching component is a manual component.

[0022] The beneficial effect of the utility model is that it provides a charging circuit, which is specifically composed of a ballast filter module, a line switching component, a voltage and current stabilizing module and a linear voltage stabilizing module. In the front stage, the ballast filter module is used to rectify and filter the input electrical signal to achieve AC-DC conversion, and combined with the voltage stabilization processing of the circuit back stage, a stable output is obtained to ensure power supply safety; at the same time, the line switching component can be used to select the output by the voltage and current stabilizing module or the linear voltage stabilizing module, so as to meet the needs of different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a circuit connection diagram of a charging circuit.

[0024] Description of labels:

[0025] 1. Ballast filter module; 2. Voltage and current stabilization module; 3. Linear voltage stabilization module;

[0026] C1, first capacitor; C2, second capacitor; C3, third capacitor; C4, fourth capacitor;

[0027] D1-D4, Schottky diode;

[0028] K1, circuit switching components;

[0029] LED1, first indicator light; LED2, second indicator light;

[0030] R1, first resistor; R2, second resistor; R3, third resistor;

[0031] U1, power management chip. DETAILED DESCRIPTION

[0032] 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.

[0033] Please refer to Figure 1 , a charging circuit, comprising a ballast filter module 1, a line switching component K1, a voltage and current stabilizing module 2 and a linear voltage stabilizing module 3;

[0034] The ballast filter module 1 is electrically connected to the input end of the circuit switch K1, the first output end of the circuit switch K1 is electrically connected to the input end of the voltage and current stabilizing module 2, and the second output end of the circuit switch K1 is electrically connected to the input end of the linear voltage stabilizing module 3;

[0035] The ballast filter module 1 is used to connect to a power supply source.

[0036] From the above description, it can be seen that the beneficial effects of the utility model are: designing a charging circuit composed of a ballast filter module 1, a line switching component K1, a voltage and current stabilizing module 2 and a linear voltage stabilizing module 3, relying on the ballast filter module 1 at the front stage to rectify and filter the input electrical signal to achieve AC-DC conversion, combined with the voltage stabilization processing of the circuit post-stage to obtain a stable output and ensure power supply safety; at the same time, the line switching component K1 can be used to select the output from the voltage and current stabilizing module 2 or the linear voltage stabilizing module 3 to meet the needs of different application scenarios.

[0037] Furthermore, the ballast filter module 1 includes a bridge rectifier component;

[0038] The output end of the bridge rectifier assembly is electrically connected to the input end of the line switching element K1;

[0039] The input end of the bridge rectifier component is used to access a power supply source.

[0040] From the above description, it can be seen that a bridge rectifier component is used in the front stage of the circuit, and the rectification operation is effectively performed through the fast switching characteristics and low forward voltage drop of the Schottky diode, thereby reducing the loss in the circuit and eliminating the need for a tap transformer, thereby reducing the cost and size of the circuit and achieving high rectification efficiency.

[0041] Furthermore, the ballast filter module 1 further includes a first capacitor C1 and a second capacitor C2;

[0042] The positive electrode of the first capacitor C1 and the positive electrode of the second capacitor C2 are both electrically connected to the output end of the bridge rectifier assembly;

[0043] The ground terminal of the bridge rectifier component, the negative electrode of the first capacitor C1 and the negative electrode of the second capacitor C2 are connected to a common ground.

[0044] From the above description, it can be known that the first capacitor C1 and the second capacitor C2 are arranged at the output end of the bridge rectifier assembly, and have filtering and energy storage functions.

[0045] Furthermore, the voltage and current stabilization module 2 includes a power management chip U1, a third capacitor C3, a fourth capacitor C4 and a first resistor R1;

[0046] The power supply end of the power management chip U1 is electrically connected to the first output end of the circuit switching element K1 and one end of the third capacitor C3 at the same time, the battery end of the power management chip U1 is electrically connected to one end of the fourth capacitor C4, and the programmable constant current setting end of the power management chip U1 is electrically connected to one end of the first resistor R1;

[0047] A ground terminal of the power management chip U1 , the other end of the third capacitor C3 , the other end of the fourth capacitor C4 , and the other end of the first resistor R1 are all grounded.

[0048] From the above description, it can be seen that the voltage and current stabilization module 2 is composed of the power management chip U1 and its peripheral circuits, and uses the power MOS tube inside the power management chip U1 to provide a constant current output to the load; at the same time, some programmable output, high temperature protection and other functions of the power management chip U1 can improve the flexibility and stability of the circuit output.

[0049] Furthermore, the voltage and current stabilizing module 2 further includes a second resistor R2 and a first indicator LED1;

[0050] One end of the second resistor R2 is electrically connected to the power supply end of the power management chip U1, the other end of the second resistor R2 is electrically connected to the positive electrode of the first indicator LED1, and the negative electrode of the first indicator LED1 is electrically connected to the charging completion indication end of the power management chip U1.

[0051] From the above description, it can be seen that the voltage and current stabilizing module 2 also has a second resistor R2 and a first indicator light LED1. By connecting to the charging completion indication terminal of the power management chip U1, the first indicator light LED1 is used to light up when charging is completed and provide feedback to the user.

[0052] Furthermore, the voltage and current stabilizing module 2 further includes a third resistor R3 and a second indicator LED2;

[0053] The positive electrode of the second indicator light LED2 is electrically connected to the first output end of the circuit switching element K1 through the third resistor R3, and the negative electrode of the second indicator light LED2 is electrically connected to the charging indication end of the power management chip U1.

[0054] It can be seen from the above description that the second indicator light LED2 is used to indicate that the circuit is in the charging operation state.

[0055] Furthermore, the circuit switching component K1 is a manual component.

[0056] It can be seen from the above description that the circuit switching component K1 is a manual component, and is manually switched by the user according to usage requirements.

[0057] Please refer to Figure 1 , Embodiment 1 of the present utility model is:

[0058] A charging circuit includes a ballast filter module 1, a line switching component K1, a voltage and current stabilizing module 2 and a linear voltage stabilizing module 3; the ballast filter module 1 is electrically connected to the input end of the line switching component K1, the first output end of the line switching component K1 is electrically connected to the input end of the voltage and current stabilizing module 2, and the second output end of the line switching component K1 is electrically connected to the input end of the linear voltage stabilizing module 3; the input ends INT1 and INT2 of the ballast filter module 1 are used to access a power supply source.

[0059] In this embodiment, some power sources that convert mechanical energy into electrical energy are connected to the ballast filter module 1, which performs AC / DC conversion and then outputs a stable voltage. At the same time, the line switching element K1 can be selected as a single-pole double-Zheng switch for switching the circuit working mode. One is a voltage and current stabilizing module 2 for battery charging, and its output port is OUT1, and the other is a linear voltage stabilizing module 3, and its output port is OUT2. In this way, switching between different working modes can be achieved to meet different needs. In other equivalent embodiments, the line switching element K1 can also use an automatic switch.

[0060] In this embodiment, the ballast filter module 1 includes a bridge rectifier component, a first capacitor C1 and a second capacitor C2;

[0061] The output end of the bridge rectifier assembly is electrically connected to the input end of the line switch K1; the input end of the bridge rectifier assembly is used to connect to the power supply source. The positive electrode of the first capacitor C1 and the positive electrode of the second capacitor C2 are both electrically connected to the output end of the bridge rectifier assembly; the ground end of the bridge rectifier assembly, the negative electrode of the first capacitor C1 and the negative electrode of the second capacitor C2 are grounded. Figure 1As shown, the bridge rectifier component is composed of four Schottky diodes D1, D2, D3 and D4, which can convert the positive input and negative input voltages into a voltage in one direction.

[0062] Please refer to Figure 1 , Embodiment 2 of the present utility model is:

[0063] A charging circuit, based on the above-mentioned embodiment 1, a voltage and current stabilizing module 2 includes a power management chip U1, a third capacitor C3, a fourth capacitor C4 and a first resistor R1; the power end of the power management chip U1 is electrically connected to the first output end of the line switching element K1 and one end of the third capacitor C3 at the same time, the battery end of the power management chip U1 is electrically connected to one end of the fourth capacitor C4, and the programmable constant current setting end of the power management chip U1 is electrically connected to one end of the first resistor R1; the ground end of the power management chip U1, the other end of the third capacitor C3, the other end of the fourth capacitor C4 and the other end of the first resistor R1 are all grounded.

[0064] In addition, the voltage and current stabilizing module 2 also includes a second resistor R2, a third resistor R3, a first indicator LED1, and a second indicator LED2; one end of the second resistor R2 is electrically connected to the power supply end of the power management chip U1, the other end of the second resistor R2 is electrically connected to the positive electrode of the first indicator LED1, and the negative electrode of the first indicator LED1 is electrically connected to the charging completion indication end of the power management chip U1. The positive electrode of the second indicator LED2 is electrically connected to the first output end of the line switching element K1 through the third resistor R3, and the negative electrode of the second indicator LED2 is electrically connected to the charging indication end of the power management chip U1.

[0065] To sum up, the utility model provides a charging circuit, which is specifically composed of a ballast filter module, a line switching component, a voltage and current stabilizing module and a linear voltage stabilizing module. At the front stage, the ballast filter module is used to rectify and filter the input electrical signal to achieve AC-DC conversion, and combined with the voltage stabilization processing of the back stage of the circuit, a stable output is obtained to ensure the power supply safety; at the same time, the line switching component can be used to select the output by the voltage and current stabilizing module or the linear voltage stabilizing module, and it is equipped with charging indication and charging completion indication functions to meet the needs of different application scenarios.

[0066] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A charging circuit, characterized in that: It includes ballast filter module, line switch, voltage and current stabilization module and linear voltage stabilization module; The ballast filter module is electrically connected to the input end of the circuit switch, the first output end of the circuit switch is electrically connected to the input end of the voltage and current stabilization module, and the second output end of the circuit switch is electrically connected to the input end of the linear voltage stabilization module; The ballast filter module is used to access a power supply source.

2. A charging circuit according to claim 1, characterized in that: The ballast filter module includes a bridge rectifier component; The output end of the bridge rectifier assembly is electrically connected to the input end of the circuit switching element; The input end of the bridge rectifier component is used to access a power supply source.

3. A charging circuit according to claim 2, characterized in that: The ballast filter module also includes a first capacitor and a second capacitor; The positive electrode of the first capacitor and the positive electrode of the second capacitor are both electrically connected to the output end of the bridge rectifier assembly; The ground terminal of the bridge rectifier component, the negative electrode of the first capacitor and the negative electrode of the second capacitor are connected to a common ground.

4. A charging circuit according to claim 1, characterized in that: The voltage and current stabilization module includes a power management chip, a third capacitor, a fourth capacitor and a first resistor; The power supply end of the power management chip is electrically connected to the first output end of the circuit switch and one end of the third capacitor at the same time, the battery end of the power management chip is electrically connected to one end of the fourth capacitor, and the programmable constant current setting end of the power management chip is electrically connected to one end of the first resistor; A ground terminal of the power management chip, the other end of the third capacitor, the other end of the fourth capacitor, and the other end of the first resistor are all grounded.

5. A charging circuit according to claim 4, characterized in that: The voltage and current stabilization module also includes a second resistor and a first indicator light; One end of the second resistor is electrically connected to the power supply end of the power management chip, the other end of the second resistor is electrically connected to the positive electrode of the first indicator light, and the negative electrode of the first indicator light is electrically connected to the charging completion indication end of the power management chip.

6. A charging circuit according to claim 4, characterized in that: The voltage and current stabilization module also includes a third resistor and a second indicator light; The positive electrode of the second indicator light is electrically connected to the first output end of the circuit switching element through the third resistor, and the negative electrode of the second indicator light is electrically connected to the charging indication end of the power management chip.

7. A charging circuit according to claim 1, characterized in that: The circuit switching component is a manual component.

Images