CN216959419U - Power management circuit and electronic equipment - Google Patents
Power management circuit and electronic equipment Download PDFInfo
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- CN216959419U CN216959419U CN202123441684.3U CN202123441684U CN216959419U CN 216959419 U CN216959419 U CN 216959419U CN 202123441684 U CN202123441684 U CN 202123441684U CN 216959419 U CN216959419 U CN 216959419U
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Abstract
The utility model discloses a power management circuit and electronic equipment. The power input end is used for being connected with a power supply. The power supply output end is used for being connected with a post-stage circuit. The input end of the energy storage circuit is connected with the power supply input end. The switching chip is provided with a first input end, a second input end and an output end, the first input end of the switching chip is connected with the power input end, the second input end of the switching chip is connected with the output end of the energy storage circuit, and the output end of the switching chip is connected with the power output end. The switching chip is used for connecting the first input end or the second input end of the switching chip with the output end under the control of the switching signal. The power supply mode switching is realized through the switching chip, and the circuit has the advantages of simple structure, low cost and low power consumption.
Description
Technical Field
The utility model relates to power management, in particular to a power management circuit and electronic equipment.
Background
Electronic devices today typically have both adapter-powered and battery-powered power supplies. When the power supply is used, the two power supply modes need to be switched through the power management circuit. The existing power management circuit is realized by adopting a reverse cut-off circuit of a diode or a mode of controlling an MOS (metal oxide semiconductor) tube by a singlechip.
For a power management circuit which is designed by simply adopting the reverse cut-off characteristic of a diode, the voltage drop is 0.7V when the diode is conducted in the forward direction, the current is overlarge when the diode is electrified, and a power system generates heat seriously and has large power consumption. For a power management circuit consisting of a single chip microcomputer, an MOS (metal oxide semiconductor) tube and a peripheral circuit, the PCB occupies a large area, and has high design cost and high system power consumption.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a power management circuit and electronic equipment, aiming at realizing lower power consumption.
In order to achieve the above object, the present invention provides a power management circuit, including:
the power supply input end is used for accessing a power supply;
the power supply output end is used for being connected with the rear-stage circuit;
the input end of the energy storage circuit is connected with the power supply input end;
the switching chip is provided with a first input end, a second input end and an output end, the first input end of the switching chip is connected with the power supply input end, the second input end of the switching chip is connected with the output end of the energy storage circuit, and the output end of the switching chip is connected with the power supply output end;
the switching chip is used for connecting the first input end or the second input end of the switching chip with the output end under the control of the switching signal.
In one embodiment, the tank circuit includes a battery and a charging circuit;
the charging circuit is provided with a first input end, a second input end, a first output end and a second output end, the first input end of the charging circuit is connected with the power supply input end, the first output end of the charging circuit is connected with the input end of the battery, the output end of the battery is connected with the second input end of the charging circuit, and the second output end of the charging circuit is connected with the power supply output end;
the charging circuit is used for managing charging current, charging voltage and charging temperature.
In one embodiment, the switching chip is an LTC4417IUF chip.
In one embodiment, the power management circuit further comprises a first voltage regulator circuit;
the input end of the first voltage stabilizing circuit is connected with the power supply input end, and the output end of the first voltage stabilizing circuit is respectively connected with the energy storage circuit and the switching chip;
the first voltage stabilizing circuit is used for converting the power supply voltage accessed by the power supply input end into a first voltage.
In one embodiment, the power management circuit further comprises an anti-reverse circuit;
the input end of the anti-reverse circuit is connected with the power supply input end, and the output end of the anti-reverse circuit is connected with the input end of the first voltage stabilizing circuit;
the reverse prevention circuit is used for disconnecting the connection between the power input end and the rear-stage circuit when the rear-stage circuit is reversely connected.
In one embodiment, the power management circuit further comprises a second voltage stabilizing circuit;
the input end of the second voltage stabilizing circuit is connected with the output end of the switching chip, and the output end of the second voltage stabilizing circuit is connected with the power supply output end;
the second voltage stabilizing circuit is used for converting the voltage output by the switching chip into a second voltage.
In one embodiment, the power management circuit further comprises a control circuit;
the control circuit has a first control end and a voltage detection end, the first control end of the control circuit is connected with the charging circuit, the voltage detection end of the control circuit is connected with the battery, the control circuit is used for controlling the charging circuit to carry out charging management on the battery, and the control circuit is also used for detecting the voltage of the battery and outputting a battery electric quantity signal and a charging state signal according to the detected battery voltage.
In one embodiment, the power management circuit further comprises an indication circuit;
the control circuit is also provided with a second control end, the indicating circuit is connected with the second control end of the control circuit and is used for displaying the battery electric quantity information according to the battery electric quantity signal output by the control circuit and displaying the battery charging state according to the charging state information output by the control circuit.
In one embodiment, the power management circuit further comprises a key assembly;
the key assembly is electrically connected with the switching chip and used for outputting a switching signal when being triggered, and the switching chip is used for controlling the connection of the first input end or the second input end with the output end according to the switching signal.
The utility model also provides an electronic device comprising the power management circuit.
The power supply mode switching is realized through the switching chip, and the circuit has the advantages of simple structure, low cost and low power consumption. For an electronic device using a battery, the low power consumption can prolong the service life of the battery. And the switching chip has smaller volume compared with the single chip microcomputer, and the space of the circuit board is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a power management circuit according to the present invention;
FIG. 2 is a schematic diagram of the LTC4417IUF chip of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a power management circuit, which includes a power input terminal 10, a power output terminal 20, a tank circuit 30 and a switching chip 40.
The power input terminal 10 is used for accessing a power supply.
The power supply output terminal 20 is used for connecting with a subsequent stage circuit.
The input of the tank circuit 30 is connected to the power input 10.
The switching chip 40 has a first input terminal, a second input terminal and an output terminal, the first input terminal of the switching chip 40 is connected to the power input terminal 10, the second input terminal of the switching chip 40 is connected to the output terminal of the energy storage circuit 30, and the output terminal of the switching chip 40 is connected to the power output terminal 20.
The switching chip 40 is configured to, under control of a switching signal, connect a first input end or a second input end of the switching chip 40 with an output end.
The power supply connected to the power supply input terminal 10 is divided into two paths, one path is output to the switching chip 40, and the other path is output to the energy storage device to charge the energy storage device. The switching chip 40 preferentially selects to output the power accessed by the power input terminal 10 to the power output terminal 20 according to the program setting of the switching chip, and supplies power to the subsequent circuit, that is, the first input terminal of the switching chip 40 is connected with the output terminal. When the power input terminal 10 is powered off or the switching chip 40 receives a switching signal, the switching chip 40 switches to output the power of the energy storage device to the power output terminal 20 to supply power to the subsequent circuit, that is, the second input terminal of the switching chip 40 is connected to the output terminal. The utility model can be used in devices needing charging, such as notebook computers, tablet computers, table lamps and the like.
The power supply mode switching is realized through the switching chip, and the circuit has the advantages of simple structure, low cost and low power consumption. For an electronic device using a battery, the low power consumption can prolong the service life of the battery. And the switching chip has smaller volume compared with the single chip microcomputer, and the space of the circuit board is saved.
In one embodiment, the tank circuit 30 includes a battery and a charging circuit.
The charging circuit has first input, second input, first output and second output, charging circuit's first input with power input 10 connects, charging circuit's first output with the input of battery is connected, the output of battery with charging circuit's second input is connected, charging circuit's second output with power output 20 connects.
The charging circuit is used for managing charging current, charging voltage and charging temperature.
The embodiment manages the battery charging through the charging circuit, and timely disconnects the charging power supply when overcurrent, overvoltage or overtemperature occurs in the battery charging process, so that the battery is protected from being influenced by large current, large voltage or high temperature.
In one embodiment, the switch chip 40 is an LTC4417IUF chip.
In one embodiment, the power management circuit further includes a first stabilizing circuit 50.
The input end of the first voltage stabilizing circuit 50 is connected to the power input end 10, and the output end of the first voltage stabilizing circuit 50 is connected to the energy storage circuit 30 and the switching chip 40, respectively.
The first voltage stabilizing circuit 50 is configured to convert a power voltage received from the power input terminal 10 into a first voltage.
The first voltage regulator circuit 50 may be a buck chip. In the present embodiment, the first voltage stabilizing circuit 50 converts the power supply connected to the power supply input terminal 10 into the voltage required by the operation of the subsequent circuit, so that the subsequent circuit operates normally.
In one embodiment, the power management circuit further comprises an anti-reverse circuit.
The input end of the anti-reverse circuit is connected with the power input end 10, and the output end of the anti-reverse circuit is connected with the input end of the first voltage stabilizing circuit 50.
The reverse prevention circuit is used for disconnecting the power input end 10 from the rear-stage circuit when the power input end is reversely connected. The protection effect is achieved for the rear-stage circuit.
In one embodiment, the power management circuit further includes a second stabilizing circuit 60.
The input end of the second voltage stabilizing circuit 60 is connected with the output end of the switching chip 40, and the output end of the second voltage stabilizing circuit 60 is connected with the power output end 20;
the second voltage stabilizing circuit 60 is configured to convert the voltage output by the switching chip 40 into a second voltage.
The second regulator circuit 60 may be a buck chip. Since the switching chip 40 cannot output a stable voltage, the voltage output by the switching chip 40 is reduced by the second voltage stabilizing circuit 60 in the present embodiment, so as to ensure that the voltage output to the power output terminal 20 is stable.
In one embodiment, the power management circuit further includes a control circuit 70.
The control circuit 70 has a first control terminal and a voltage detection terminal, the first control terminal of the control circuit 70 is connected to the charging circuit, the voltage detection terminal of the control circuit 70 is connected to the battery, the control circuit 70 is used for controlling the charging circuit to perform charging management on the battery, and the control circuit 70 is further used for detecting the voltage of the battery and outputting a battery capacity signal and a charging state signal according to the detected voltage of the battery.
The control circuit 70 may optionally be a microprocessor. The present embodiment manages the charging state of the battery through the control circuit 70, and detects the battery capacity and the charging state signal in real time.
In one embodiment, the power management circuit further includes an indication circuit 80.
The control circuit 70 further has a second control terminal, the indication circuit 80 is connected to the second control terminal of the control circuit 70, and the indication circuit 80 is configured to display battery power information according to the battery power signal output by the control circuit 70, and display a battery charging state according to the charging state information output by the control circuit 70.
The indicating circuit 80 may be an indicator light or a display screen. The present embodiment displays the battery level and the charging status through the indication circuit 80, so that the user can more intuitively obtain the battery status.
In one embodiment, the power management circuit further includes a key assembly.
The key assembly is electrically connected with the switching chip 40, the key assembly is used for outputting a switching signal when triggered, and the switching chip 40 is used for controlling the connection between the first input end or the second input end and the output end according to the switching signal.
The user can also select to supply power to the subsequent circuit through the power supply accessed by the power supply input end 10 or supply power to the subsequent circuit through the energy storage device by triggering the key to switch the power supply mode.
The utility model also provides an electronic device comprising the power management circuit.
It can be understood that, because the power management circuit is used in the electronic device, the embodiment of the electronic device includes all technical solutions of all embodiments of the power management circuit, and the achieved technical effects are also completely the same, and are not described herein again.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A power management circuit, the power management circuit comprising:
the power supply input end is used for accessing a power supply;
the power supply output end is used for being connected with the rear-stage circuit;
the input end of the energy storage circuit is connected with the power supply input end;
the switching chip is provided with a first input end, a second input end and an output end, the first input end of the switching chip is connected with the power supply input end, the second input end of the switching chip is connected with the output end of the energy storage circuit, and the output end of the switching chip is connected with the power supply output end;
the switching chip is used for connecting the first input end or the second input end of the switching chip with the output end under the control of the switching signal.
2. The power management circuit of claim 1, wherein the tank circuit comprises a battery and a charging circuit;
the charging circuit is provided with a first input end, a second input end, a first output end and a second output end, the first input end of the charging circuit is connected with the power supply input end, the first output end of the charging circuit is connected with the input end of the battery, the output end of the battery is connected with the second input end of the charging circuit, and the second output end of the charging circuit is connected with the power supply output end;
the charging circuit is used for managing charging current, charging voltage and charging temperature.
3. The power management circuit of claim 1, wherein the switching chip is an LTC4417IUF chip.
4. The power management circuit of claim 1, wherein the power management circuit further comprises a first voltage regulator circuit;
the input end of the first voltage stabilizing circuit is connected with the power supply input end, and the output end of the first voltage stabilizing circuit is respectively connected with the energy storage circuit and the switching chip;
the first voltage stabilizing circuit is used for converting the power supply voltage accessed by the power supply input end into a first voltage.
5. The power management circuit of claim 4, further comprising an anti-reverse circuit;
the input end of the anti-reverse circuit is connected with the power supply input end, and the output end of the anti-reverse circuit is connected with the input end of the first voltage stabilizing circuit;
the reverse prevention circuit is used for disconnecting the connection between the power input end and the rear-stage circuit when the rear-stage circuit is reversely connected.
6. The power management circuit of claim 1, further comprising a second voltage regulation circuit;
the input end of the second voltage stabilizing circuit is connected with the output end of the switching chip, and the output end of the second voltage stabilizing circuit is connected with the power supply output end;
the second voltage stabilizing circuit is used for converting the voltage output by the switching chip into a second voltage.
7. The power management circuit of claim 2, wherein the power management circuit further comprises a control circuit;
the control circuit has a first control end and a voltage detection end, the first control end of the control circuit is connected with the charging circuit, the voltage detection end of the control circuit is connected with the battery, the control circuit is used for controlling the charging circuit to carry out charging management on the battery, and the control circuit is also used for detecting the voltage of the battery and outputting a battery electric quantity signal and a charging state signal according to the detected battery voltage.
8. The power management circuit of claim 7, wherein the power management circuit further comprises an indication circuit;
the control circuit is also provided with a second control end, the indicating circuit is connected with the second control end of the control circuit and is used for displaying the battery electric quantity information according to the battery electric quantity signal output by the control circuit and displaying the battery charging state according to the charging state information output by the control circuit.
9. The power management circuit according to claim 1, wherein the power management circuit further comprises a key assembly;
the key assembly is electrically connected with the switching chip and used for outputting a switching signal when being triggered, and the switching chip is used for controlling the connection of the first input end or the second input end with the output end according to the switching signal.
10. An electronic device comprising the power management circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441684.3U CN216959419U (en) | 2021-12-30 | 2021-12-30 | Power management circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441684.3U CN216959419U (en) | 2021-12-30 | 2021-12-30 | Power management circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216959419U true CN216959419U (en) | 2022-07-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123441684.3U Active CN216959419U (en) | 2021-12-30 | 2021-12-30 | Power management circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216959419U (en) |
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2021
- 2021-12-30 CN CN202123441684.3U patent/CN216959419U/en active Active
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