CN210225252U - DC-DC power supply switching circuit - Google Patents
DC-DC power supply switching circuit Download PDFInfo
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- CN210225252U CN210225252U CN201921302565.XU CN201921302565U CN210225252U CN 210225252 U CN210225252 U CN 210225252U CN 201921302565 U CN201921302565 U CN 201921302565U CN 210225252 U CN210225252 U CN 210225252U
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Abstract
The embodiment of the utility model provides a DC-DC power supply switching circuit is related to, DC-DC power supply switching circuit includes: the device comprises a working voltage input terminal, a linear voltage stabilizer, a DC-DC voltage management module, a first-class load, a second-class load, a voltage holding circuit, an inductor and a capacitor; the input end of the linear voltage stabilizer is connected with the working voltage input terminal, and the output end of the linear voltage stabilizer is connected with the first class load to supply power to the first class load; the class of loads are electric loads which are not powered off in a chip sleep state; the input end of the DC-DC voltage management module is connected with the working voltage input terminal, and the output end of the DC-DC voltage management module is connected with the second type of load to supply power to the second type of load; the second type of load is an electric load for powering off the chip in a dormant state; the output end of the DC-DC voltage management module is also connected with the inductor and the capacitor which are connected in series to be grounded; the input end of the voltage holding circuit is connected with the output end of the linear voltage stabilizer, and the output end of the voltage holding circuit is connected with the first end of the inductor.
Description
Technical Field
The utility model relates to a circuit design technical field especially relates to a DC-DC power supply switching circuit.
Background
The working modes of the system-on-chip comprise a normal working mode and a sleep mode, and part of the on-chip electricity loads are in a power-off state when the system enters the sleep mode, so that the power consumption can be reduced. For the part of the electricity utilization loads, the electricity can be supplied through the DC-DC voltage management module, and the DC-DC voltage management module is also closed during dormancy, so that the energy consumption can be further saved.
However, during the wake-up from the sleep mode, the output voltage of the DC-DC voltage management module starts from 0V to the required voltage, which usually takes 1ms to several ms, or even longer. Therefore, the wake-up time of the power load is relatively long, and the requirement of the system on the response speed sometimes cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims at prior art's defect, provide a direct current-direct current (DC-DC) power supply switching circuit, can realize that DC-DC voltage management module arouses to the mode switch of normal mode from the sleep mode under, can reach expected voltage value very fast, and need not lengthy settling time to reduced the boot time of arousing from the sleep to greatly, the power supply of the establishment to the power consumption load that can be quick.
To achieve the above object, the present invention provides a DC-DC power switching circuit, including: the device comprises a working voltage input terminal, a linear voltage stabilizer, a DC-DC voltage management module, a first-class load, a second-class load, a voltage holding circuit, an inductor and a capacitor;
the input end of the linear voltage stabilizer is connected with the working voltage input terminal, and the output end of the linear voltage stabilizer is connected with the first class load to supply power to the first class load; the class of loads are electric loads which are not powered off in a chip sleep state;
the input end of the DC-DC voltage management module is connected with the working voltage input terminal, and the output end of the DC-DC voltage management module is connected with the second type of load to supply power to the second type of load; the second type of load is an electric load for powering off the chip in a dormant state;
the output end of the DC-DC voltage management module is also connected with the inductor and the capacitor which are connected in series to be grounded;
the input end of the voltage holding circuit is connected with the output end of the linear voltage stabilizer, and the output end of the voltage holding circuit is connected with the first end of the inductor.
Preferably, the connection between the output terminal of the DC-DC voltage management module and the inductor and the capacitor in series is specifically:
the output end of the DC-DC voltage management module is connected with the first end of the inductor, the second end of the inductor is connected with the first end of the capacitor, and the second end of the capacitor is grounded.
Preferably, in the sleep state, the DC-DC voltage management module is in the off state, and the class ii load is powered off; the output voltage of the DC-DC voltage management module is equal to the output voltage of the voltage holding circuit.
The embodiment of the utility model provides a DC-DC power supply switching circuit can realize that DC-DC voltage management module arouses to the mode switch of normal mode from the sleep mode under, can reach anticipated magnitude of voltage very fast, and does not need lengthy establishment time to reduced the boot time of arousing from the dormancy greatly, the power supply to the power consumption load of establishment that can be quick.
Drawings
Fig. 1 is a schematic diagram of a DC-DC power switching circuit provided in an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Fig. 1 is a schematic diagram of a DC-DC power switching circuit provided in an embodiment of the present invention, and the DC-DC power switching circuit provided in an embodiment of the present invention is described below with reference to fig. 1.
In this example, the DC-DC power supply switching circuit includes: the device comprises a working voltage input terminal 1, a linear voltage regulator 2, a DC-DC voltage management module 3, a first-class load 4, a second-class load 5, a voltage holding circuit 6, an inductor L1 and a capacitor C1;
the input end of the linear voltage stabilizer 2 is connected with the working voltage input terminal 1, and the output end of the linear voltage stabilizer is connected with a first-class load 4 to supply power to the first-class load 4; wherein, the class-4 load is an electric load which is not powered off in a chip sleep state;
the DC-DC voltage management module 3 can be specifically realized by a DC-DC converter, provides required voltage output for a load according to the requirement, and is characterized in that the input end of the DC-DC voltage management module 3 is connected with a working voltage input terminal, and the output end of the DC-DC voltage management module is connected with a second-class load 5 to supply power to the second-class load 5; specifically, the second-class load 5 is an electric load for power failure in a chip sleep state;
the output end of the DC-DC voltage management module 3 is also connected with an inductor L1 and a capacitor C1 which are connected to the ground in series; specifically, the output terminal of the DC-DC voltage management module 3 is connected to the first terminal of the inductor L1, the second terminal of the inductor L1 is connected to the first terminal of the capacitor C1, and the second terminal of the capacitor C1 is grounded.
The input terminal of the voltage holding circuit 6 is connected to the output terminal of the linear regulator 2, and the output terminal of the voltage holding circuit 6 is connected to the first terminal of the inductor L1.
In the sleep state, the DC-DC voltage management module 3 is in the off state, the class ii load 5 is powered off, and the output voltage of the DC-DC voltage management module 3 is held at the output voltage of the voltage holding circuit 6.
Therefore, when the DC-DC power supply switching circuit is from dormancy to awakening, the DC-DC voltage management module 3 in the DC-DC power supply switching circuit can respond to startup quickly, and the problem that the time for starting the output voltage from 0V to the required voltage is long because the inductor C1 and the capacitor L1 connected behind the DC-DC voltage management module 3 are large is solved.
It should be noted that the linear regulator, the voltage holding circuit, and the DC-DC converter in the present embodiment are all common circuit components in an electronic circuit, and those skilled in the art can adopt required circuit components to perform specific applications as needed.
The embodiment of the utility model provides a DC-DC power supply switching circuit, the response time that DC-DC power supply route switched from dormancy to operating condition has been optimized, through the output voltage clamp of voltage holding circuit with DC-DC voltage management module to voltage holding circuit's output voltage, thereby can realize that DC-DC voltage management module can reach expected voltage value very fast when awakening the mode switch of normal operating mode from the dormancy mode, DC-DC voltage management module has been reduced greatly from the dormancy to the boot time of awakening, the power supply of establishment to the power consumption load that can be quick.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (3)
1. A DC-DC power switching circuit, comprising: the device comprises a working voltage input terminal, a linear voltage stabilizer, a DC-DC voltage management module, a first-class load, a second-class load, a voltage holding circuit, an inductor and a capacitor;
the input end of the linear voltage stabilizer is connected with the working voltage input terminal, and the output end of the linear voltage stabilizer is connected with the first class load to supply power to the first class load; the class of loads are electric loads which are not powered off in a chip sleep state;
the input end of the DC-DC voltage management module is connected with the working voltage input terminal, and the output end of the DC-DC voltage management module is connected with the second type of load to supply power to the second type of load; the second type of load is an electric load for powering off the chip in a dormant state;
the output end of the DC-DC voltage management module is also connected with the inductor and the capacitor which are connected in series to be grounded;
the input end of the voltage holding circuit is connected with the output end of the linear voltage stabilizer, and the output end of the voltage holding circuit is connected with the first end of the inductor.
2. The DC-DC power switching circuit of claim 1, wherein the output terminal of the DC-DC voltage management module is further connected to the inductor and the capacitor in series to ground, specifically:
the output end of the DC-DC voltage management module is connected with the first end of the inductor, the second end of the inductor is connected with the first end of the capacitor, and the second end of the capacitor is grounded.
3. The DC-DC power switching circuit of claim 1, wherein in a sleep state, the DC-DC voltage management module is in an off state and the class two load is powered down; the output voltage of the DC-DC voltage management module is equal to the output voltage of the voltage holding circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921302565.XU CN210225252U (en) | 2019-08-12 | 2019-08-12 | DC-DC power supply switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921302565.XU CN210225252U (en) | 2019-08-12 | 2019-08-12 | DC-DC power supply switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210225252U true CN210225252U (en) | 2020-03-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921302565.XU Active CN210225252U (en) | 2019-08-12 | 2019-08-12 | DC-DC power supply switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210225252U (en) |
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2019
- 2019-08-12 CN CN201921302565.XU patent/CN210225252U/en active Active
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| GR01 | Patent grant | ||
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Address after: 100080, Beijing, Suzhou Street, Haidian District No. 20, building 2, on the north side of the four floor Patentee after: Zhaoxun Hengda Technology Co., Ltd Address before: 100080, Beijing, Suzhou Street, Haidian District No. 20, building 2, on the north side of the four floor Patentee before: MEGAHUNT MICROELECTRONIC TECH. (BEIJING) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |