CN118971615A - A low power consumption DC-DC circuit - Google Patents
A low power consumption DC-DC circuit Download PDFInfo
- Publication number
- CN118971615A CN118971615A CN202411070011.7A CN202411070011A CN118971615A CN 118971615 A CN118971615 A CN 118971615A CN 202411070011 A CN202411070011 A CN 202411070011A CN 118971615 A CN118971615 A CN 118971615A
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- CN
- China
- Prior art keywords
- circuit
- battery
- chip
- load
- switch
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of DC power input into DC power output
- H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
- H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
- H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
-
- H02J7/90—
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention aims to provide the low-power-consumption DC-DC circuit which has a simple structure, can thoroughly turn off the working power supply of the whole circuit in a non-working state and can effectively prolong the storage time of a battery. The invention comprises a DC-DC circuit main body (1) formed by a DC-DC chip (U1) and a peripheral circuit thereof, wherein a VIN pin of the DC-DC chip (U1) is connected with a Battery (BAT), an output pin of the DC-DC chip (U1) is connected with the anode and the cathode of a Load (Load), the circuit is further provided with an on-off switch (2) on the VIN pin of the DC-DC chip (U1), and the on-off switch (2) controls the on-off between the Battery (BAT) and the DC-DC circuit main body (1) according to the requirement of the Load through a communicated controller (MCU). The invention is applied to the technical field of power supplies.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a low-power-consumption DC-DC circuit.
Background
The current product power supply circuit uses the EN-PIN of the DC-DC controller itself to turn off or enable, as shown in fig. 1, the battery is powered, and the DC-DC chip U2 is used to control whether the circuit outputs power to the load. However, even if EN in the circuit turns off the DC-DC operation, the whole circuit still has power consumption due to the physical conduction between the battery and the whole circuit. The power consumption can continuously consume energy, the storage time of the battery is reduced, the useless energy consumption of the circuit is increased, products in the field of the battery need to be charged at intervals, and the users are bothered. In the field of commercial power, energy can be continuously lost, and the waste of energy is caused.
Therefore, it is necessary to design a DC-DC circuit capable of completely turning off the operating power of the entire circuit in the non-operating state to ensure the service life of the battery.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and providing the low-power-consumption DC-DC circuit which has a simple structure, can thoroughly turn off the working power supply of the whole circuit in a non-working state and can effectively prolong the storage time of a battery.
The technical scheme adopted by the invention is that the circuit comprises a DC-DC circuit main body composed of a DC-DC chip and a peripheral circuit thereof, wherein the VIN pin of the DC-DC chip is connected with a battery, the output pin of the DC-DC chip is connected with the anode and the cathode of a load, the circuit is further provided with an on-off switch on the VIN pin of the DC-DC chip, and the on-off switch controls the on-off between the battery and the DC-DC circuit main body according to the requirement of the load through a communicated controller.
The VIN pin of the DC-DC chip is also provided with an on-off switch, the on-off switch controls the on-off between the battery and the DC-DC circuit main body according to the requirement of a load through a communicated controller, and in a state of no power supply, the on-off switch sends an off signal to the on-off switch through the controller, and the on-off switch turns off the working power supply of the whole circuit, so that the purpose that the DC-DC circuit has no power consumption at all is achieved; therefore, the working power supply of the whole circuit can be thoroughly turned off in a non-working state, the storage time of the battery can be effectively prolonged, the circuit is simple in structure and convenient to realize, electric energy can be effectively saved for a product using the battery, power consumption is reduced, and the application of the battery in more environmental protection is realized.
Further, the on-off switch is a first MOS tube, and the grid electrode of the first MOS tube is connected with the IO port of the controller through a second MOS tube. The static switch characteristic of the MOS tube is utilized, and the controller is utilized to send signals to realize the on-off between the battery and the DC-DC circuit main body, so that the low energy consumption of the circuit is ensured.
Still further, a conduction path is also provided between the battery and the load. It follows that when the DC-DC circuit is not needed to control the output, the conduction link is directly adopted to realize the output of the battery power, so that various choices are facilitated.
In addition, the controller is a singlechip. The singlechip is used for sending signals to the on-off switch, so that the stability and the reliability of the circuit are ensured.
In addition, the battery is a rechargeable battery. This is favorable to the reuse of battery, has realized environmental protection application.
Drawings
FIG. 1 is a schematic block diagram of a prior art product DC-DC circuit;
FIG. 2 is a schematic block diagram of the circuit of the present invention;
fig. 3 is a schematic circuit diagram of the present invention.
Detailed Description
As shown in fig. 2 and 3, the present invention includes a DC-DC circuit body 1 composed of a DC-DC chip U1 and its peripheral circuits, the VIN pin of the DC-DC chip U1 is connected to a battery BAT, and the output pin of the DC-DC chip U1 is connected to the positive and negative poles of a Load. The circuit is characterized in that an on-off switch 2 is further arranged on a VIN pin of the DC-DC chip U1, and the on-off switch 2 controls on-off between a battery BAT and the DC-DC circuit main body 1 according to the requirement of a load through a communicated controller MCU.
Specifically, the on-off switch 2 is a first MOS transistor Q1, and a gate of the first MOS transistor Q1 is connected to an IO port of the controller MCU through a second MOS transistor Q2. Here, the second MOS transistor plays an effective protective role for the MCU. And a communication link is also arranged between the battery BAT and the Load. The controller MCU is a singlechip. The battery BAT is a rechargeable battery.
In the DC-DC chip U1, the VIN pin is a power supply pin, the EN_UVLO pin is an enabling pin, the RT and SS/TRK pins are frequency modulation pins, the SYNCIN and VCC pins are compensation pins and a reference voltage pin, when the COMP pin is an unstable power supply or a device has a tolerance, the compensation pin is used for compensation, the FB/SW is the frequency modulation pin, the third MOS tube Q3 and the fourth MOS tube Q4 are used for boosting or reducing the voltage of the positive electrode and the negative electrode of the output, the HO, BST, ILIM, LO pins are used for controlling the working states of the third MOS tube Q3 and the fourth MOS tube Q4, and the AGND/PGND is grounded.
In the invention, after a DC-DC circuit is connected to a battery BAT, the DC-DC chip U1 can continuously consume the electric quantity of the battery BAT, and the work power supply of the whole circuit is controlled to be turned off through the IO port of the controller MCU when the product is not used by adding the first MOS tube Q1 on the power supply pin of the DC-DC chip U1 as the on-off switch, so that the purpose that the DC-DC circuit has no power consumption at all is achieved.
Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the invention, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the invention, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the invention.
Claims (5)
1. The utility model provides a low-power consumption DC-DC circuit, includes DC-DC circuit main part (1) that constitutes by DC-DC chip (U1) and peripheral circuit thereof, VIN foot and Battery (BAT) of DC-DC chip (U1) are connected, the positive negative pole of Load (Load) is connected to the output foot of DC-DC chip (U1), its characterized in that, this circuit still is provided with on-off switch (2) on the VIN foot of DC-DC chip (U1), on-off switch (2) come according to the demand of Load control Battery (BAT) with the break-make between DC-DC circuit main part (1) through the controller (MCU) of intercommunication.
2. The low-power-consumption DC-DC circuit according to claim 1, wherein the on-off switch (2) is a first MOS tube (Q1), and a grid electrode of the first MOS tube (Q1) is connected with an IO port of the controller (MCU) through a second MOS tube (Q2).
3. A low power consumption DC-DC circuit according to claim 1, characterized in that a conductive connection is also provided between the Battery (BAT) and the Load (Load).
4. The low power consumption DC-DC circuit of claim 1, wherein the controller (MCU) is a single-chip microcomputer.
5. A low power consumption DC-DC circuit according to claim 1, characterized in that the Battery (BAT) is a rechargeable battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411070011.7A CN118971615A (en) | 2024-08-06 | 2024-08-06 | A low power consumption DC-DC circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411070011.7A CN118971615A (en) | 2024-08-06 | 2024-08-06 | A low power consumption DC-DC circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118971615A true CN118971615A (en) | 2024-11-15 |
Family
ID=93394117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411070011.7A Pending CN118971615A (en) | 2024-08-06 | 2024-08-06 | A low power consumption DC-DC circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118971615A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201392483Y (en) * | 2009-03-06 | 2010-01-27 | 惠州三华工业有限公司 | Voltage reducing type voltage stabilizing circuit |
| CN104600676A (en) * | 2015-01-29 | 2015-05-06 | 天地融科技股份有限公司 | Battery protection circuit, electric energy supply device and electronic device |
| WO2020238306A1 (en) * | 2019-05-30 | 2020-12-03 | 深圳可立克科技股份有限公司 | Dc-ac inverter protection circuit for lithium battery and energy storage device |
-
2024
- 2024-08-06 CN CN202411070011.7A patent/CN118971615A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201392483Y (en) * | 2009-03-06 | 2010-01-27 | 惠州三华工业有限公司 | Voltage reducing type voltage stabilizing circuit |
| CN104600676A (en) * | 2015-01-29 | 2015-05-06 | 天地融科技股份有限公司 | Battery protection circuit, electric energy supply device and electronic device |
| WO2020238306A1 (en) * | 2019-05-30 | 2020-12-03 | 深圳可立克科技股份有限公司 | Dc-ac inverter protection circuit for lithium battery and energy storage device |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |