CN218733350U - Constant-current charging circuit and charging device - Google Patents
Constant-current charging circuit and charging device Download PDFInfo
- Publication number
- CN218733350U CN218733350U CN202222913894.6U CN202222913894U CN218733350U CN 218733350 U CN218733350 U CN 218733350U CN 202222913894 U CN202222913894 U CN 202222913894U CN 218733350 U CN218733350 U CN 218733350U
- Authority
- CN
- China
- Prior art keywords
- module
- output
- voltage
- resistor
- sampling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a constant-current charging circuit and charging device, the circuit includes voltage conversion module, output filter module, first sampling module, second sampling module and amplification module, the voltage conversion module is used for converting the input voltage, the output module is used for converting the voltage that the voltage conversion module exported into the target voltage; the first sampling module is connected between the output end of the output module and the feedback end of the voltage conversion module; the amplifying module is used for amplifying the sampling voltage output by the second sampling module and transmitting the amplified sampling voltage to the feedback end of the voltage conversion module. The embodiment of the utility model provides a when technical scheme charges to equipment such as rear end battery, no matter the battery is in what kind of voltage status, this constant current charging circuit's input voltage can not follow the state of battery and change, can remain stable output that lasts under the different states of battery, consequently can improve charge efficiency.
Description
Technical Field
The utility model relates to a switching power supply technical field especially relates to a constant current charging circuit and charging device.
Background
With the development of power electronic technology, people have higher and higher requirements on the performance of switching power supplies.
In the process of charging a battery, in order to achieve an efficient charging mode, an input-following-output charging mode is usually selected or a DCDC isolation module is used for charging, and a linear charging mode is selected instead of the following charging mode, but the charging modes have the problems of high cost and low energy efficiency.
Therefore, it is necessary to provide a charging circuit with high energy efficiency and low cost.
SUMMERY OF THE UTILITY MODEL
The utility model provides a constant current charging circuit and charging device to improve charge efficiency, reduce cost.
According to the utility model discloses an aspect provides a constant current charging circuit, include: the device comprises a voltage conversion module, an output filtering module, a first sampling module, a second sampling module and an amplification module; the voltage conversion module comprises an input end, an output end and a feedback end;
the input end of the voltage conversion module is connected with an input voltage, the input end of the output module is connected with the output end of the voltage conversion module, the output end of the output module is used as the output end of the constant-current charging circuit, the voltage conversion module is used for converting the input voltage, and the output module is used for converting the voltage output by the voltage conversion module into a target voltage;
the first end of the output filtering module is connected with the output end of the output module, and the second end of the output filtering module is grounded;
the first end of the first sampling module is connected with the output end of the output module, and the second end of the first sampling module is connected with the feedback end of the voltage conversion module; the first end of the second sampling module is connected with the second end of the output filtering module, and the second end of the second sampling module is grounded;
the amplifying module is connected in parallel with the second sampling module and used for amplifying the sampling voltage output by the second sampling module and transmitting the amplified sampling voltage to the feedback end of the voltage conversion module.
Optionally, the amplifying module includes an operational amplifier, a first resistor, a second resistor, a third resistor, and a first diode;
the first end of the first resistor is connected with the first end of the second sampling module, the second end of the first resistor is connected with the first input end of the operational amplifier, the first end of the second resistor is connected with the second end of the second sampling module, the second end of the second resistor is connected with the second input end of the operational amplifier, and the output end of the operational amplifier is connected with the feedback end of the voltage conversion module through the first diode; the first end of the third resistor is connected with the first input end of the operational amplifier, and the second end of the third resistor is connected with the output end of the operational amplifier.
Optionally, the first sampling module comprises a fourth resistor, a fifth resistor and a sixth resistor;
the first end of the fourth resistor is connected with the feedback end of the voltage conversion module, the second end of the fourth resistor is grounded, the first end of the fifth resistor is connected with the feedback end of the voltage conversion module, and the second end of the fifth resistor is connected with the output end of the output module through the sixth resistor.
Optionally, the second sampling module includes a seventh resistor, a first end of the seventh resistor is connected to the output end of the output module, and a second end of the seventh resistor is grounded.
Optionally, the output filter module includes a first capacitor and a second capacitor; the first end of the first capacitor is connected with the output end of the output module, the second end of the first capacitor is connected with the first end of the second sampling module, and the second capacitor is connected with the first capacitor in parallel.
Optionally, the first capacitor is a non-inductive capacitor.
Optionally, the output module includes an inductor and a second diode, a first end of the inductor is connected to the output end of the voltage conversion module, a second end of the inductor serves as the output end of the output module, a first end of the second diode is grounded, and a second end of the second diode is connected to the first end of the inductor.
Optionally, the voltage conversion module further comprises an input filtering module, the input filtering module comprises a third capacitor and a fourth capacitor, a first end of the third capacitor is connected with the input end of the voltage conversion module, a second end of the third capacitor is grounded, and the fourth capacitor is connected in parallel with the third capacitor.
Optionally, the voltage conversion module comprises a DC-DC converter.
According to the utility model discloses an on the other hand provides a charging device, include the utility model discloses the constant current charging circuit that arbitrary embodiment provided.
The utility model discloses technical scheme samples output module's output current through setting up second sampling module, then enlarge the sampling voltage of second sampling module on through the amplification module, and the sampling voltage transmission after will enlarging to the feedback end of voltage conversion module, with the output state of control voltage conversion module, make voltage conversion module switch on and turn-off alternative work, thereby make the output current of voltage conversion module reach dynamic balance, and then realize the constant current output, guarantee that the output has higher efficiency. Compared with the prior art, the embodiment of the utility model provides a when the technical scheme charges to equipment such as rear end battery, no matter what kind of voltage state is in to the battery, this constant current charging circuit's input voltage can not follow the state of battery and change, and constant current charging circuit's output voltage can remain stable output that lasts under the different states of battery, consequently can improve charge efficiency, guarantees the power supply normal operating of system. And the constant current charging circuit has simple structure and lower cost.
It should be understood that the statements herein are not intended to identify key or critical features of any embodiment of the present invention, nor are they intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained without creative efforts.
Fig. 1 is a schematic structural diagram of a constant current charging circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another constant current charging circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another constant current charging circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another constant current charging circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another constant current charging circuit provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another constant current charging circuit provided in an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
Fig. 1 is a schematic structural diagram of a constant current charging circuit provided in an embodiment of the present invention, referring to fig. 1, the constant current charging circuit includes a voltage conversion module 110, an output module 120, an output filtering module 130, a first sampling module 140, a second sampling module 150, and an amplifying module 160; the voltage conversion module 110 includes an input terminal IN, an output terminal SW, and a feedback terminal FB;
the input end IN of the voltage conversion module 110 is connected to the input voltage VO, the input end of the output module 120 is connected to the output end SW of the voltage conversion module 110, and the output end of the output module 120 serves as the output end of the constant current charging circuit. The input voltage VO may be an output voltage of the switching power supply or the adapter. The voltage conversion module 110 is configured to convert the input voltage VO, where the conversion mode may be a boost mode or a buck mode, and the output module 120 is configured to convert the voltage output by the voltage conversion module 110 into a target voltage VBS to charge a rear-end battery. The battery may be a lead acid battery or a lithium battery.
A first end of the output filter module 130 is connected with an output end of the output module 120, and a second end of the output filter module 130 is grounded; a first terminal of the second sampling module 150 is connected to the second terminal of the output filter module 130, and a second terminal of the second sampling module 150 is grounded. The output filter module 130 is configured to filter the output voltage of the output module 120 to stabilize the output voltage and current of the output module 120, so as to ensure the sampling precision of the second sampling module 150. The second sampling module 150 is configured to sample a constant current, and is configured to sample a current at an output terminal of the output module 120. Here, the second terminal of the output filter module 130 may be connected to a digital ground, and the second terminal of the second sampling module 150 may be connected to an analog ground.
A first terminal of the first sampling module 140 is connected to the output terminal of the output module 120, and a second terminal of the first sampling module 140 is connected to the feedback terminal FB of the voltage converting module 110. The first sampling module 140 is configured to sample a voltage at an output end of the output module 120, and transmit the sampled voltage to the feedback end FB of the voltage conversion module 110, so as to control the voltage conversion module 110 to adjust its output voltage.
The amplifying module 160 is connected in parallel to the second sampling module 150, and is configured to amplify the sampled voltage output by the second sampling module 150, and transmit the amplified sampled voltage to the feedback terminal FB of the voltage converting module 110. Specifically, when the input voltage VO is charged to the rear battery, the second sampling module 150 samples the output current and generates a sampled voltage to be transmitted to the input terminal of the amplifying module 160. The amplifying module 160 amplifies the input sampled voltage, transmits the amplified sampled voltage to the feedback terminal FB of the voltage converting module 110, and compares the amplified sampled voltage with the voltage of the feedback terminal FB, thereby controlling the output of the voltage converting module 110.
Illustratively, when the voltage at the feedback terminal FB of the voltage converting module 110 is less than the voltage output by the amplifying module 160, the output function of the voltage converting module 110 is turned off, so that the output current is reduced; when the voltage at the feedback terminal FB of the voltage converting module 110 is greater than the voltage output by the amplifying module 160, the output function of the voltage converting module 110 is turned on, so that the output current is increased. Therefore, the voltage conversion module 110 is in a dynamic adjustment state (on and off are alternated), so that the output current reaches a dynamic balance, and thus the target charging current is reached.
The embodiment of the utility model provides a constant current charging circuit, output module's output current is sampled through setting up the second sampling module, then sample voltage on to the second sampling module through enlarging the module and enlarge, and the sampling voltage after will enlarging transmits to voltage conversion module's feedback end, with the output state of control voltage conversion module, make voltage conversion module switch on and turn-off alternative work, thereby make voltage conversion module's output current reach dynamic balance, and then realize constant current output, guarantee that the output has higher efficiency. Compared with the prior art, the embodiment of the utility model provides a when the technical scheme charges to equipment such as rear end battery, no matter what kind of voltage state is in to the battery, this constant current charging circuit's input voltage can not follow the state of battery and change, and constant current charging circuit's output voltage can remain stable output that lasts under the different states of battery, consequently can improve charge efficiency, guarantees the power supply normal operating of system. And the constant current charging circuit has simple structure and lower cost.
Fig. 2 is a schematic structural diagram of another constant current charging circuit provided in an embodiment of the present invention, referring to fig. 2, on the basis of the foregoing technical solution, optionally, the amplifying module 160 includes an operational amplifier OPA, a first resistor R1, a second resistor R2, a third resistor R3, and a first diode D1; a first end of the first resistor R1 is connected to a first end of the second sampling module 150, a second end of the first resistor R1 is connected to a first input end of the operational amplifier OPA, a first end of the second resistor R2 is connected to a second end of the second sampling module 150, a second end of the second resistor R2 is connected to a second input end of the operational amplifier OPA, and an output end of the operational amplifier OPA is connected to the feedback end FE of the voltage conversion module 110 through the first diode D1; a first terminal of the third resistor R3 is connected to a first input terminal of the operational amplifier OPA, and a second terminal of the third resistor R3 is connected to an output terminal of the operational amplifier OPA.
Specifically, the first input terminal of the operational amplifier OPA is an inverting input terminal, the second input terminal is a non-inverting input terminal, and the sampling voltage of the second sampling module 150 is amplified to an operational voltage by the operational amplifier OPA. According to the virtual short principle of the operational amplifier OPA, the voltage at the first input terminal is equal to the sampling voltage of the second sampling module 150, and the amplification factor of the operational amplifier OPA is R1/R3, the voltage V2= V1 × R1/R3-0.7V output to the feedback terminal FB of the voltage converting module 110, where V1 is the sampling voltage of the second sampling module 150 and 0.7V is the voltage drop of the first diode D1. For example, if the first resistor R1 is 1K Ω and the third resistor R3 is 499K Ω, the amplification factor of the operational amplifier OPA is 499 times.
In practical application, the magnification factor can be selected according to specific requirements. Here, the first diode D1 is used to play a role of clamping and protecting, and prevent the voltage of the feedback terminal FB of the voltage conversion module 110 from being too high to damage the operational amplifier OPA.
Fig. 3 is a schematic structural diagram of another constant current charging circuit provided in an embodiment of the present invention, and referring to fig. 3, on the basis of the foregoing technical solutions, optionally, the first sampling module 140 includes a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6; a first end of the fourth resistor R4 is connected to the feedback terminal FB of the voltage converting module 110, a second end of the fourth resistor R4 is grounded, a first end of the fifth resistor R5 is connected to the feedback terminal FB of the voltage converting module 110, and a second end of the fifth resistor R5 is connected to the output end of the output module 120 through the sixth resistor R6.
The resistances of the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 are relatively large, and the resistors are used for performing a voltage division sampling function, and the output voltage of the output module 120 is collected and fed back to the feedback terminal FB of the voltage conversion module 110 through the voltage division of the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6, so that a feedback network of the voltage conversion module 110 is formed, and the stability of the output of the voltage conversion module 110 is improved.
Fig. 4 is a schematic structural diagram of another constant current charging circuit provided in the embodiment of the present invention, referring to fig. 4, on the basis of the above technical solutions, optionally, the second sampling module 150 includes a seventh resistor R7, a first end of the seventh resistor R7 is connected to the output end of the output module 120, and a second end of the seventh resistor R7 is grounded.
Specifically, the seventh resistor R7 is a constant current sampling resistor, and has a resistance of milliohm level, and is used for current sampling of the output voltage of the output module 120. When the current flows through the seventh resistor R7, a voltage is generated, but the voltage is small, and the amplified voltage is amplified by the amplifying module 160 to form an operational voltage.
With continued reference to fig. 4, the output filter module 130 includes a first capacitor C1 and a second capacitor C2; a first end of the first capacitor C1 is connected to the output end of the output module 120, a second end of the first capacitor C1 is connected to a first end of the second sampling module 150, and the second capacitor C2 is connected to the first capacitor C1 in parallel. The first capacitor C1 is a non-inductive capacitor, and can better absorb the surge at the output end of the output module 120, so as to achieve the purpose of smooth output.
Fig. 5 is a schematic structural diagram of another constant current charging circuit provided in an embodiment of the present invention, referring to fig. 5, on the basis of the above technical solutions, optionally, the output module 120 includes an inductor L1 and a second diode D2, a first end of the inductor L1 is connected to the output SW of the voltage conversion module 110, a second end of the inductor L1 is used as the output end of the output module 120, a first end of the second diode D2 is grounded, and a second end of the second diode D2 is connected to the first end of the inductor L1.
The inductor L1 is an energy storage inductor, and is configured to convert the PWM signal output by the output end SW of the voltage conversion module 110 into a dc voltage for output. The second diode D2 is a freewheeling diode, the first end of the diode is a positive terminal, the second end of the diode is a negative terminal, and the second diode D2 is connected in parallel to the two ends of the inductor L1 in the reverse direction to prevent the back electromotive force on the inductor L1 from breaking down the voltage conversion module 110, thereby playing a role in protection.
Further, with reference to fig. 5, the constant current charging circuit further includes an input filtering module 170, the input filtering module 170 includes a third capacitor C3 and a fourth capacitor C4, a first end of the third capacitor C3 is connected to the input terminal IN of the voltage converting module 110, a second end of the third capacitor C3 is grounded, and the fourth capacitor C4 is connected to the third capacitor C3 IN parallel. The third capacitor C3 and the fourth capacitor C4 form an input filter network of the voltage converting module 110, so as to make the input voltage VO more stable.
In this embodiment, the voltage conversion module 110 may be a DC-DC converter to generate a DC voltage required for charging the battery. Fig. 6 is a schematic structural diagram of another constant current charging circuit according to an embodiment of the present invention, and referring to fig. 6, on the basis of the foregoing technical solutions, the voltage conversion module 110 includes a DC-DC conversion chip. Taking the constant current charging circuit shown in fig. 6 as an example, the working principle of the charging circuit provided in this embodiment is specifically described.
The constant current charging circuit can be used for charging a battery, and an input voltage VO of the constant current charging circuit is an output voltage of a switching power supply or an adapter, and is filtered by an input filter network formed by a third capacitor C3 and a fourth capacitor C4 and then input to an input terminal IN of a DC-DC conversion chip (a voltage conversion module 110), where the DC-DC conversion chip includes two ground terminals, one of which is a digital ground terminal GND and the other is an analog ground terminal OGND (IN this embodiment, IN order to prevent a digital signal and an analog signal from interfering with each other, the ground terminals are divided into a digital ground terminal and an analog ground terminal, and the digital ground terminal and the analog ground terminal are separately connected, respectively). The DC-DC conversion chip converts the input voltage VO and outputs the converted input voltage VO from an output terminal SW thereof, where the voltage output from the output terminal SW is a PWM signal. The inductor L1 converts the PWM signal of the output end SW of the DC-DC conversion chip into a direct current voltage signal for output, and the second diode D2 is used for afterflow. Therefore, the input voltage VO can be converted into the target voltage VBS required for the battery through the DC-DC conversion chip. An output filter network formed by the first capacitor C1 and the second capacitor C2 is used for smoothing the output of the inductor L1, so that the stability of the output voltage is ensured.
The first sampling module 140 formed by the fourth resistor R4, the fifth resistor R5 and the sixth resistor R6 is configured to sample the output target voltage VBS, feed back the sampled output target voltage VBS to the feedback terminal FB of the DC-DC conversion chip, and control the DC-DC conversion chip. Therefore, the automatic adjustment of the output voltage can be realized without changing the internal impedance of the DC-DC conversion chip.
The second sampling module 150 formed by the seventh resistor R7 is a constant current sampling module, and is used for the output current of the constant current charging circuit. The amplifying module 160 can amplify the voltage across the seventh resistor R7. In the process of charging the battery, a sampling voltage V1 is obtained on the seventh resistor R7, and according to the virtual short principle of the operational amplifier OPA, the voltage of the first input terminal is equal to the sampling voltage V1, so that the voltage of the output terminal of the operational amplifier OPA is KV1, where K is the amplification factor of the operational amplifier. The amplified voltage is output to the feedback terminal FB of the DC-DC conversion chip, and at this time, the voltage V2 of the feedback terminal FB of the DC-DC conversion chip is KV1-0.7 (0.7V is the voltage drop of the first diode D1). When V2 is more than KV1-0.7, the output of the DC-DC conversion chip is closed, and the output current is gradually reduced. When the DC-DC conversion chip detects that the voltage V2 of the feedback end FB is larger than KV1-0.7, the output of the DC-DC conversion chip is turned on, and the output current is gradually increased, so that the dynamic balance of the output current is realized, and the constant preset charging current is achieved. No matter what voltage state the battery is in, the input voltage of the constant-current charging circuit can not change along with the state of the battery, and the output voltage of the constant-current charging circuit can keep stable and continuous output in different states of the battery, so that the charging efficiency can be improved, and the normal operation of power supply of a system is ensured. And the constant current charging circuit has simple structure and lower cost.
Optionally, the embodiment of the utility model provides a charging device is still provided, and this charging device includes the utility model discloses the constant current charging circuit that arbitrary embodiment provided, consequently, this charging device possesses the beneficial effect that above-mentioned arbitrary embodiment described equally.
It should be understood that various forms of the flows shown above, reordering, adding or deleting steps, may be used. For example, the steps described in the present invention may be executed in parallel, may be executed sequentially, or may be executed in different orders, as long as the desired result of the technical solution of the present invention can be achieved, and the present invention is not limited thereto.
The above detailed description does not limit the scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A constant current charging circuit, comprising: the device comprises a voltage conversion module, an output filtering module, a first sampling module, a second sampling module and an amplification module; the voltage conversion module comprises an input end, an output end and a feedback end;
the input end of the voltage conversion module is connected with an input voltage, the input end of the output module is connected with the output end of the voltage conversion module, the output end of the output module is used as the output end of the constant-current charging circuit, the voltage conversion module is used for converting the input voltage, and the output module is used for converting the voltage output by the voltage conversion module into a target voltage;
the first end of the output filtering module is connected with the output end of the output module, and the second end of the output filtering module is grounded;
the first end of the first sampling module is connected with the output end of the output module, and the second end of the first sampling module is connected with the feedback end of the voltage conversion module; the first end of the second sampling module is connected with the second end of the output filtering module, and the second end of the second sampling module is grounded;
the amplifying module is connected in parallel with the second sampling module and used for amplifying the sampling voltage output by the second sampling module and transmitting the amplified sampling voltage to the feedback end of the voltage conversion module.
2. The constant current charging circuit according to claim 1, wherein the amplifying block comprises an operational amplifier, a first resistor, a second resistor, a third resistor, and a first diode;
the first end of the first resistor is connected with the first end of the second sampling module, the second end of the first resistor is connected with the first input end of the operational amplifier, the first end of the second resistor is connected with the second end of the second sampling module, the second end of the second resistor is connected with the second input end of the operational amplifier, and the output end of the operational amplifier is connected with the feedback end of the voltage conversion module through the first diode; the first end of the third resistor is connected with the first input end of the operational amplifier, and the second end of the third resistor is connected with the output end of the operational amplifier.
3. The constant-current charging circuit according to claim 1, wherein the first sampling module comprises a fourth resistor, a fifth resistor and a sixth resistor;
the first end of the fourth resistor is connected with the feedback end of the voltage conversion module, the second end of the fourth resistor is grounded, the first end of the fifth resistor is connected with the feedback end of the voltage conversion module, and the second end of the fifth resistor is connected with the output end of the output module through the sixth resistor.
4. The constant-current charging circuit according to claim 1, wherein the second sampling module comprises a seventh resistor, a first end of the seventh resistor is connected to the output end of the output module, and a second end of the seventh resistor is grounded.
5. The constant current charging circuit of claim 1, wherein the output filtering module comprises a first capacitor and a second capacitor;
the first end of the first capacitor is connected with the output end of the output module, the second end of the first capacitor is connected with the first end of the second sampling module, and the second capacitor is connected with the first capacitor in parallel.
6. The constant current charging circuit of claim 5, wherein the first capacitor is a non-inductive capacitor.
7. The constant current charging circuit of claim 1, wherein the output module comprises an inductor and a second diode, a first end of the inductor is connected to the output terminal of the voltage conversion module, a second end of the inductor serves as the output terminal of the output module, a first end of the second diode is grounded, and a second end of the second diode is connected to the first end of the inductor.
8. The constant current charging circuit according to claim 1, further comprising an input filter module, wherein the input filter module comprises a third capacitor and a fourth capacitor, a first end of the third capacitor is connected to the input end of the voltage conversion module, a second end of the third capacitor is grounded, and the fourth capacitor is connected in parallel with the third capacitor.
9. The constant current charging circuit of claim 1, wherein the voltage conversion module comprises a DC-DC converter.
10. A charging device comprising the constant-current charging circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222913894.6U CN218733350U (en) | 2022-11-02 | 2022-11-02 | Constant-current charging circuit and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222913894.6U CN218733350U (en) | 2022-11-02 | 2022-11-02 | Constant-current charging circuit and charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218733350U true CN218733350U (en) | 2023-03-24 |
Family
ID=85598992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222913894.6U Active CN218733350U (en) | 2022-11-02 | 2022-11-02 | Constant-current charging circuit and charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218733350U (en) |
-
2022
- 2022-11-02 CN CN202222913894.6U patent/CN218733350U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100508343C (en) | Digital dc-dc converter using digital modulation | |
| CN112909722A (en) | High-power pulse laser power supply circuit | |
| CN103036427A (en) | Synchronous buck converter | |
| CN101001046A (en) | Switching regulator | |
| US20240079956A1 (en) | Hybrid power converter | |
| CN216390547U (en) | PD charging circuit capable of automatically compensating line loss | |
| CN216356513U (en) | Off-line switching power supply circuit and feedback control chip thereof | |
| US20210249870A1 (en) | Battery control circuit, battery and unmanned aerial vehicle | |
| CN101860054B (en) | Charge management circuit of lithium-ion battery | |
| CN218733350U (en) | Constant-current charging circuit and charging device | |
| CN210380337U (en) | Charging chip supporting flexible input and output | |
| CN102097839B (en) | Voltage and current adaptive control circuit | |
| CN104980023A (en) | Output voltage controlling circuit and power supply provided with same | |
| CN204794694U (en) | Out put voltage control circuit and have power of this circuit | |
| CN102879627A (en) | Output voltage detection circuit of DC/DC conversion circuit | |
| CN202978699U (en) | Multiple-voltage switching device | |
| CN115118160A (en) | Power supply system | |
| CN100386957C (en) | Control circuit for carrying out current limitation on peak current controlled DC-DC transformer | |
| CN201966640U (en) | Voltage and current timely feed control circuit | |
| CN217590583U (en) | Isolated power output sampling circuit | |
| CN103683887B (en) | Control method, the device of a kind of micropower low-power consumption DC-DC change-over circuit and this circuit | |
| CN204425188U (en) | Flyback power supply circuit and apply the energy feedback type electronic load of this circuit | |
| CN214380155U (en) | Dual-interface simultaneous charging device and equipment | |
| CN111799985B (en) | Signal sampling device and conversion device | |
| CN214256130U (en) | LLC resonant transformation ware control circuit and LLC resonant transformation circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |