CN216720999U - Clock chip power supply circuit and timer - Google Patents
Clock chip power supply circuit and timer Download PDFInfo
- Publication number
- CN216720999U CN216720999U CN202122575073.1U CN202122575073U CN216720999U CN 216720999 U CN216720999 U CN 216720999U CN 202122575073 U CN202122575073 U CN 202122575073U CN 216720999 U CN216720999 U CN 216720999U
- Authority
- CN
- China
- Prior art keywords
- power supply
- voltage
- circuit
- supply circuit
- clock chip
- 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
- Electric Clocks (AREA)
Abstract
The utility model discloses a clock chip power supply circuit and a timer, wherein the clock chip power supply circuit is internally provided with a power supply circuit, a battery power supply circuit and a switching circuit, the power supply circuit is connected with the output end of the battery power supply circuit and the input end of the switching circuit, the output end of the switching circuit is connected with the power supply input end of a clock chip, the switching circuit is used for receiving the power supply voltage output by the power supply circuit and the battery voltage output by the battery power supply circuit, and the switching circuit is also used for outputting the battery voltage to the power supply input end of the clock chip when the power supply voltage is smaller than a preset voltage threshold value; when the power supply voltage is smaller than the preset voltage threshold, the clock chip is powered through the battery power supply circuit, and the technical problem that clock timing cannot be carried out when the clock chip is powered down is avoided.
Description
Technical Field
The utility model relates to the technical field of clock timing, in particular to a clock chip power supply circuit and a timer.
Background
With the development of science and technology, more and more electronic products can provide a timing function, and the realization of the timing function cannot leave a clock chip, wherein, the RTC is the most widely used one, the RTC is a real-time clock chip which can provide accurate real-time or provide an accurate time reference for an electronic system, and the real-time clock chip mostly adopts a crystal oscillator with higher precision as a clock source at present. However, if the clock chip is powered down, the clock cannot be clocked.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a clock chip power supply circuit, and aims to solve the technical problem that clock timing cannot be performed when a clock chip is powered off in the prior art.
In order to achieve the above object, the present invention provides a clock chip power supply circuit, which includes: the clock chip comprises a power supply circuit, a battery supply circuit and a switching circuit, wherein the power supply circuit is connected with the output end of the battery supply circuit and the input end of the switching circuit, and the output end of the switching circuit is connected with the power supply input end of the clock chip;
the switching circuit is used for receiving the power supply voltage output by the power supply circuit and the battery voltage output by the battery supply circuit;
the switching circuit is further configured to output the battery voltage to a power input terminal of the clock chip when the power voltage is smaller than a preset voltage threshold.
Optionally, the clock chip power supply circuit further includes: the input end of the voltage division circuit is connected with the output end of the switching circuit, and the output end of the voltage division circuit is connected with the power supply input end of the clock chip;
and the voltage division circuit is used for reducing the voltage output by the switching circuit and transmitting the reduced voltage to the power supply input end of the clock chip.
Optionally, the voltage divider circuit includes: a first resistor;
the first end of the first resistor is connected with the output end of the switching circuit, and the second end of the first resistor is connected with the power input end of the clock chip.
Optionally, the first resistance is a variable resistance.
Optionally, the switching circuit comprises: a first diode;
the first end of the first diode is connected with the output end of the power supply circuit, and the second end of the first diode is connected with the first end of the first resistor;
and the first diode is used for reducing the power supply voltage output by the power supply circuit and outputting the reduced voltage to the power supply input end of the clock chip when the first diode is conducted.
Optionally, the on-voltage output by the first diode is greater than the battery voltage output by the battery power supply circuit.
Optionally, the switching circuit further comprises: a second diode;
the first end of the second diode is connected with the output end of the battery power supply circuit, and the second end of the second diode is respectively connected with the second end of the first diode and the first end of the first resistor;
and the second diode is used for reducing the voltage of the battery output by the battery power supply circuit and outputting the reduced voltage to the power supply input end of the clock chip when the second diode is conducted.
Optionally, the clock chip power supply circuit further includes: a filter circuit;
the input end of the filter circuit is connected with the output end of the switching circuit, and the output end of the filter circuit is grounded.
Optionally, the filter circuit comprises: a first capacitor;
the first end of the first capacitor is connected with the second end of the first diode and the second end of the second diode respectively, and the second end of the first capacitor is grounded.
In order to achieve the above object, the present invention further provides a timer, where the timer includes the power supply circuit, the battery supply circuit, and the switching circuit in the clock chip power supply circuit, the switching circuit is configured to receive the power voltage output by the power supply circuit and the battery voltage output by the battery supply circuit, and the switching circuit is further configured to output the battery voltage to the power input end of the clock chip when the power voltage is smaller than a preset voltage threshold.
In the utility model, a power supply circuit, a battery supply circuit and a switching circuit are arranged in a clock chip power supply circuit, wherein the power supply circuit is connected with the output end of the battery supply circuit and the input end of the switching circuit, the output end of the switching circuit is connected with the power supply input end of a clock chip, the switching circuit is used for receiving the power supply voltage output by the power supply circuit and the battery voltage output by the battery supply circuit, and the switching circuit is also used for outputting the battery voltage to the power supply input end of the clock chip when the power supply voltage is smaller than a preset voltage threshold; through the voltage input to the power supply circuit and the battery supply circuit, when the power supply voltage is greater than a preset voltage threshold value, the power supply circuit supplies power to the clock chip, and when the power supply voltage is less than the preset voltage threshold value, the battery supply circuit supplies power to the clock chip.
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 structural diagram of a clock chip power supply circuit according to a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a clock chip power supply circuit according to a second embodiment of the present invention;
fig. 3 is a schematic diagram of a temperature characteristic of a battery in an embodiment of a clock chip power supply circuit according to the utility model.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
60 | |
| 20 | Battery power supply circuit | D1 | |
| 30 | Switching circuit | D2 | |
| 40 | Clock chip | C1 | |
| 50 | Voltage divider circuit | R1 | A first resistor |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The technical solutions in the embodiments of the present invention will be described clearly and completely 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, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a clock chip power supply circuit according to a first embodiment of the present invention.
The utility model provides a first embodiment of a clock chip power supply circuit.
In the first embodiment, the clock chip power supply circuit includes a power supply circuit 10, a battery power supply circuit 20 and a switching circuit 30, an output end of the power supply circuit 10 and an output end of the battery power supply circuit 20 are connected to an input end of the switching circuit 30, an output end of the switching circuit 30 is connected to a power input end of the clock chip 40, the switching circuit 30 is configured to receive a power voltage output by the power supply circuit 10 and a battery voltage output by the battery power supply circuit 20, and the switching circuit 30 is further configured to output the battery voltage to the power input end of the clock chip 40 when the power voltage is smaller than a preset voltage threshold.
It should be noted that the power supply circuit 10 may be a power supply circuit on a motherboard, and is used to output a power supply voltage; the battery power supply circuit 20 may be an external battery circuit for outputting a battery voltage; the switching circuit 30 may determine whether to output the power voltage or the battery voltage according to a magnitude relationship between the power voltage and a preset voltage threshold, so as to implement power supply switching of the Clock chip 40, where the preset voltage threshold may be manually set, that is, when the power voltage is smaller than the preset voltage threshold, the battery voltage is output to a power input terminal of the Clock chip 40, where the Clock chip 40 may be a Real-Time Clock (RTC) chip, and the Clock chip is configured to perform timing based on a voltage signal output by the switching circuit 30.
It is understood that the switching circuit 30 is further configured to receive the power supply voltage output by the power supply circuit 10 and the battery voltage output by the battery power supply circuit 20, and perform voltage reduction processing on the received voltages, for example: when the power supply voltage transmitted by the power supply circuit 10 is 3.3V, the voltage of 3.2V is output to the clock chip 40 after passing through the switching circuit 30; similarly, when the battery voltage received from the battery power supply circuit 20 is 3V, the switching circuit 30 outputs 2.9V to the clock chip 40.
In a specific implementation, the power supply circuit 10 transmits a power supply voltage signal to the switching circuit 30, and the battery supply circuit 20 transmits a battery voltage signal to the switching circuit 30, when detecting that the value of the power supply voltage signal is greater than the battery voltage, the switching circuit 30 transmits the power supply voltage to the clock chip 40 to enable the clock chip 40 to operate, and when detecting that the value of the power supply voltage signal is less than the battery voltage, the switching circuit 30 transmits the battery voltage to the clock chip 40 to enable the clock chip 40 to operate; for example: the RTC supply voltage range is 1.6V-3.6V, the voltage provided by the power supply circuit is 3.3V, the voltage provided by the battery supply circuit is 3V, and at the moment, after the switching circuit 30 performs voltage reduction processing on the received voltage, the reduced voltage is applied to the RTC so that the RTC works.
In this embodiment, a power supply circuit, a battery supply circuit and a switching circuit are arranged in a clock chip power supply circuit, the power supply circuit is connected with an output end of the battery supply circuit and an input end of the switching circuit, an output end of the switching circuit is connected with a power input end of a clock chip, the switching circuit is used for receiving a power supply voltage output by the power supply circuit and a battery voltage output by the battery supply circuit, and the switching circuit is further used for outputting the battery voltage to the power input end of the clock chip when the power supply voltage is smaller than a preset voltage threshold; through the voltage input to the power supply circuit and the battery supply circuit, when the power supply voltage is greater than a preset voltage threshold value, the power supply circuit supplies power to the clock chip, and when the power supply voltage is less than the preset voltage threshold value, the battery supply circuit supplies power to the clock chip.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a clock chip power supply circuit according to a second embodiment of the present invention. Based on the first embodiment, the utility model provides a second embodiment of the clock chip power supply circuit.
In this embodiment, the clock chip power supply circuit further includes: a voltage dividing circuit 50;
the input end of the voltage dividing circuit 50 is connected with the output end of the switching circuit 30, and the output end of the voltage dividing circuit 50 is connected with the power input end of the clock chip 40;
the voltage dividing circuit 50 may be configured to divide the power voltage transmitted by the power supply circuit 10, and may also be configured to divide the battery voltage transmitted by the battery power supply circuit 20.
In a specific implementation, the voltage divider circuit 50 may be configured to step down the voltage output by the switching circuit 30, and transmit the stepped-down voltage to the power input terminal of the clock chip 40,
further, in order to enable the switching circuit 30 to transmit the battery voltage provided by the battery power supply circuit 20 when the power supply voltage is smaller than the preset voltage threshold, the voltage dividing circuit 50 includes: a first resistor R1;
a first end of the first resistor R1 is connected to the output terminal of the switching circuit 30, and a second end of the first resistor R1 is connected to the power input terminal of the clock chip 40.
TABLE 1
It can be understood that, referring to table 1, the current difference of the RTC is large due to different ambient temperatures at a specific voltage, and the influence of the ambient temperature is small when the power input terminal of the clock chip 40 is low, so that the first end of the first resistor R1 is connected to the output terminal of the switching circuit 30, and the second end of the first resistor R1 is connected to the power input terminal of the clock chip 40, so as to step down the voltage output by the switching circuit 30, share part of the voltage of the clock chip 40, and transmit the stepped-down voltage to the power input terminal of the clock chip 40, reduce the current in the circuit, so that the service life of the battery is not influenced by the ambient temperature when the battery operates.
In addition, the first resistor R1 may be a variable resistor, and in an implementation, when the battery power supply circuit 20 provides the battery voltage, the battery voltage is mainly concentrated at 2.6V and above, referring to fig. 3, under normal temperature environment, when the first resistor R1 is not connected, the voltage corresponding to the power supply connection end of the clock chip 40 is 2.5V due to the function of the switching circuit, and the current corresponding to the circuit is 4.8uA at this time, after the voltage divider circuit 50 is connected, the voltage at the power supply input terminal of the clock chip 40 needs to be reduced to 2.3V to make the current in the circuit lower than 2uA, and prolong the service life of the battery, the first resistor R1 needs to share the voltage of 0.2V, at this time, the current in the circuit is reduced from 4.8uA to 1.7uA, that is, the first resistor R1 can be a 120K ohm resistor, so that the magnitude of the first resistor R1 is related to the voltage provided by the battery power supply circuit, and the first resistor R1 is a variable resistor.
In this embodiment, the time-shift circuit further includes: a first diode D1;
the first end of the first diode D1 is connected to the output end of the power supply circuit 10, the second end of the first diode D1 is connected to the first end of the first resistor R1, and the first diode D1 is configured to step down the power supply voltage output by the power supply circuit 10 and output the power supply voltage to the power input end of the clock chip 40 when the clock chip is turned on.
In a specific implementation, the first diode D1 may step down a power voltage provided by the power supply circuit 10 to obtain a turn-on voltage, and transmit the turn-on voltage to the voltage divider circuit 50, and then the turn-on voltage is output to the clock chip 40 through the voltage divider circuit 50, for example: the power supply voltage provided by the power supply circuit 10 is 3.3V, and when the first diode D1 receives the power supply voltage provided by the power supply circuit 10, the voltage transmitted to the voltage divider circuit is 3.2V.
The on-voltage output by the first diode D1 is greater than the battery voltage output by the battery power supply circuit 20, so as to ensure that the power supply circuit 10 preferentially supplies power when neither the power supply circuit 10 nor the battery power supply circuit 20 is powered off.
Further, in order to enable the power supply circuit 10 and the battery power supply circuit 20 to assist power supply, the switching circuit further includes: a second diode D2;
the first end of the second diode D2 is connected to the output end of the battery power supply circuit, the second end of the second diode D2 is connected to the second end of the first diode and the first end of the first resistor, respectively, and the second diode D2 is configured to step down the battery voltage output by the battery power supply circuit 20 and output the battery voltage to the power input end of the clock chip 40 when the second diode D2 is turned on.
In a specific implementation, the second diode D2 may step down the battery voltage provided by the battery power supply circuit 20 to obtain a turn-on voltage, and transmit the turn-on voltage to the voltage divider circuit 50, and then output the turn-on voltage to the clock chip 40 through the voltage divider circuit 50, for example: the battery voltage provided by the battery power supply circuit 20 is 3.0V, and when the second diode D2 receives the battery voltage provided by the battery power supply circuit 20, the voltage output to the voltage divider circuit is 2.9V.
Since the power voltage outputted from the first diode D1 is greater than the current voltage outputted from the second diode D2, when neither the power supply circuit 10 nor the battery supply circuit 20 is powered off, the second diode D2 is not turned on, and only the first diode D1 turns on the power supply circuit 10 to output the power voltage to the clock chip 40.
It should be noted that, if the second diode D2 is turned on when the power voltage provided by the power supply circuit 10 is less than the battery voltage provided by the battery power supply circuit 20, at this time, only the second diode D2 turns on the battery power supply circuit 20 to output the battery voltage to the clock chip 40, but since there may be instability of the power voltage of the power supply circuit 10, the power voltage provided by the power supply circuit 10 is less than the battery voltage provided by the battery power supply circuit 20, that is, it is necessary to determine whether the power supply circuit 10 is powered off, a preset voltage threshold may be set, and when the power voltage provided by the power supply circuit 10 is less than the preset voltage threshold, the battery voltage is output to the power input terminal of the clock chip 40, for example: when the preset voltage threshold is 0.5V and the power supply voltage provided by the power supply circuit 10 is less than 0.5V, the switching circuit outputs the battery voltage provided by the battery supply circuit 20 to the power supply input terminal of the clock chip through the second diode D2.
In this embodiment, the clock chip power supply circuit further includes: a filter circuit 60;
the input end of the filter circuit 60 is connected to the output end of the switching circuit 30, and the output end of the filter circuit 60 is grounded.
In a specific implementation, the input end of the filter circuit 60 is connected to the output end of the switching circuit 30 and the input end of the voltage divider circuit 50, the filter circuit 60 is charged according to the voltage output by the switching circuit 30 after the switching circuit 30 is turned on, when the power voltage output by the power supply circuit 10 is smaller than a preset voltage threshold, the power supply circuit switches, at this time, the voltage in the circuit changes, and the filter circuit 60 releases the stored voltage, so that the voltage stability can be maintained, and the voltage abrupt change during circuit switching can be prevented.
Further, the filter circuit 60 includes: a first capacitance C1;
the first terminal of the first capacitor C1 is connected to the second terminal of the first diode D1 and the second terminal of the second diode D2, respectively, and the second terminal of the first capacitor C1 is grounded.
In a specific implementation, a first terminal of the first capacitor C1 is connected to the second terminal of the first diode D1, the second terminal of the second diode D2, and the first terminal of the first resistor R1, respectively, and a second terminal of the first capacitor C1 is grounded. The first capacitor C1 is charged and stored according to the voltage output by the first diode D1 or the second diode D2 after the switching circuit 30 is turned on, when the switching circuit 30 is switched, that is, the first diode D1 operates, the second diode D2 does not operate, the first diode D1 does not operate, when the second diode D2 operates, or the first diode D1 does not operate, the second diode D2 operates, the first diode D1 operates, and when the second diode D2 does not operate, the voltage in the circuit changes, the first capacitor C1 releases the stored voltage, so that the voltage stability can be maintained, and the voltage jump during the circuit switching can be prevented.
In order to achieve the purpose, the utility model also provides a timer. The timer comprises a power supply circuit, a battery supply circuit and a switching circuit in the clock chip power supply circuit. The specific structure of the clock chip power supply circuit refers to the above embodiments, and since the timer can adopt the technical solutions of all the above embodiments, the timer at least has the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A clock chip power supply circuit, comprising: the clock comprises a power supply circuit, a battery power supply circuit and a switching circuit, wherein the power supply circuit is connected with the output end of the battery power supply circuit and the input end of the switching circuit, and the output end of the switching circuit is connected with the power supply input end of a clock chip;
the switching circuit is used for receiving the power supply voltage output by the power supply circuit and the battery voltage output by the battery supply circuit;
the switching circuit is further used for outputting the battery voltage to a power supply input end of the clock chip when the power supply voltage is smaller than a preset voltage threshold;
the clock chip power supply circuit further comprises: the input end of the voltage division circuit is connected with the output end of the switching circuit, and the output end of the voltage division circuit is connected with the power supply input end of the clock chip;
the voltage division circuit is used for reducing the voltage output by the switching circuit and transmitting the reduced voltage to the power supply input end of the clock chip;
the voltage dividing circuit includes: a first resistor;
the first end of the first resistor is connected with the output end of the switching circuit, and the second end of the first resistor is connected with the power input end of the clock chip.
2. The clock chip power supply circuit of claim 1, wherein the first resistor is a variable resistor.
3. The clock chip power supply circuit of claim 2, wherein the switching circuit comprises: a first diode;
the first end of the first diode is connected with the output end of the power supply circuit, and the second end of the first diode is connected with the first end of the first resistor;
and the first diode is used for reducing the voltage of the power supply output by the power supply circuit and outputting the reduced voltage to the power supply input end of the clock chip when the first diode is conducted.
4. The clock chip power supply circuit of claim 3, wherein the first diode output has an on voltage that is greater than a battery voltage output by the battery power supply circuit.
5. The clock chip supply circuit of claim 4, wherein the switching circuit further comprises: a second diode;
the first end of the second diode is connected with the output end of the battery power supply circuit, and the second end of the second diode is respectively connected with the second end of the first diode and the first end of the first resistor;
and the second diode is used for reducing the voltage of the battery output by the battery power supply circuit and outputting the reduced voltage to the power supply input end of the clock chip when the second diode is conducted.
6. The clock chip power supply circuit of claim 5, wherein the clock chip power supply circuit further comprises: a filter circuit;
the input end of the filter circuit is connected with the output end of the switching circuit, and the output end of the filter circuit is grounded.
7. The clock chip power supply circuit of claim 6, wherein the filter circuit comprises: a first capacitor;
the first end of the first capacitor is connected with the second end of the first diode and the second end of the second diode respectively, and the second end of the first capacitor is grounded.
8. A timepiece, characterized in that it comprises a clock chip supply circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122575073.1U CN216720999U (en) | 2021-10-25 | 2021-10-25 | Clock chip power supply circuit and timer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122575073.1U CN216720999U (en) | 2021-10-25 | 2021-10-25 | Clock chip power supply circuit and timer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216720999U true CN216720999U (en) | 2022-06-10 |
Family
ID=81877082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122575073.1U Active CN216720999U (en) | 2021-10-25 | 2021-10-25 | Clock chip power supply circuit and timer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216720999U (en) |
-
2021
- 2021-10-25 CN CN202122575073.1U patent/CN216720999U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8612792B2 (en) | Power measurement device | |
| CN210053236U (en) | Low-loss reverse connection prevention power-on system | |
| EP4016789A1 (en) | Battery management apparatus | |
| JP6124010B2 (en) | Electronic control unit | |
| CN214045083U (en) | Battery charging control circuit and device | |
| CN102832915A (en) | Programmable power-on reset system | |
| CN216720999U (en) | Clock chip power supply circuit and timer | |
| CN215705794U (en) | Charging interface awakening circuit | |
| CN218958613U (en) | Low-power consumption power supply circuit, low-power consumption system and electronic equipment | |
| CN217880044U (en) | Circuit for realizing N key detection and low-power consumption awakening function through two IO ports | |
| CN210041388U (en) | Constant voltage constant current control circuit and power converter | |
| TW200941199A (en) | An electronic apparatus and an auto wake-up circuit | |
| CN112706653A (en) | AC charging CC signal detection circuit with awakening function | |
| CN103869146A (en) | Battery voltage detection circuit | |
| CN108233905B (en) | Power-on reset circuit and power supply device | |
| CN213069106U (en) | Battery voltage detection circuit structure capable of avoiding power consumption | |
| CN218558591U (en) | Power consumption regulating circuit and electric vehicle | |
| CN215474510U (en) | Slow charging wake-up circuit and charging circuit of electric automobile | |
| CN211032191U (en) | Wake-up circuit | |
| CN220114492U (en) | Awakening circuit of battery management system and battery pack | |
| CN216599116U (en) | Standby power supply circuit and electric equipment | |
| CN214822707U (en) | AC charging CC signal detection circuit with awakening function | |
| CN220381556U (en) | Equipment awakening circuit and equipment | |
| CN108196098B (en) | Test circuit and test power supply | |
| CN217693284U (en) | Reliable turn-off circuit of electronic switch power device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |