CN220711168U - Standby power supply management device - Google Patents
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- CN220711168U CN220711168U CN202322169123.5U CN202322169123U CN220711168U CN 220711168 U CN220711168 U CN 220711168U CN 202322169123 U CN202322169123 U CN 202322169123U CN 220711168 U CN220711168 U CN 220711168U
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- 238000001514 detection method Methods 0.000 claims abstract description 61
- 239000003990 capacitor Substances 0.000 claims abstract description 44
- 230000005669 field effect Effects 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 11
- 230000001133 acceleration Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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Abstract
The utility model provides a standby power management device, comprising: the device comprises a power supply module, a first voltage division module, a second voltage division module, a current limiting module, a first switch control module, a reference module and a detection module; the power supply module is electrically connected with the current limiting module; the current limiting module is also electrically connected with the reference module and the second voltage dividing module respectively; the first switch control module is electrically connected with the first voltage dividing module; the detection module is respectively and electrically connected with the power supply module and the reference module; after power-on, the reference module outputs high voltage, the high voltage is divided by the second voltage dividing module to enable the first control switch module to be conducted, voltage is provided for the power supply module through the first voltage dividing module, the power supply module judges the detection point of the detection module, and when the voltage value is larger than a preset value, charging is completed. When the system works normally, the post-stage power supply does not need the super capacitor to provide output, so that the charge and discharge times of the super capacitor can be reduced, the service life of the super capacitor is prolonged, and the material cost is reduced.
Description
Technical Field
The utility model relates to the field of power supply, in particular to a standby power supply management device.
Background
Currently, in the industry, most electronic devices require that the system maintain a certain working time for backing up data or locking the current operating state of the device after the input power is turned off. For low power applications, the backup power source typically uses button cells; for high power applications, batteries or supercapacitors are typically used. The storage battery is used as a standby power supply, so that larger power output can be provided, but the service life of the storage battery is short, the storage battery needs to be replaced at intervals, and the maintenance cost is increased. The super capacitor is used as a standby power supply, larger power output can be provided, the service life is long, but the Shan Jiedian capacity voltage resistance of the super capacitor is lower, and if the power supply voltage of the system is higher and the power supply has a wider range, a plurality of stages of super capacitors are connected in series to enable the voltage resistance of the super capacitor to be far larger than the input voltage, so that the material cost is increased.
Disclosure of Invention
In view of the above, the present utility model is directed to a standby power management device for overcoming the defects in the prior art.
The utility model provides the following technical scheme:
in one embodiment, a standby power management apparatus includes: the device comprises a power supply module, a first voltage division module, a second voltage division module, a current limiting module, a first switch control module, a reference module and a detection module;
the power supply module is electrically connected with the current limiting module;
the current limiting module is also respectively and electrically connected with the reference module and the second voltage dividing module;
the power supply module is also electrically connected with a first voltage division point of the first voltage division module;
the first switch control module is electrically connected with a second voltage division point of the second voltage division module;
the first switch control module is electrically connected with the first voltage dividing module;
the detection module is respectively and electrically connected with the power supply module and the reference module;
after power-on, the reference module outputs a first voltage, the first voltage is divided by the second voltage dividing module and then is input into the first switch control module, the first switch control module is controlled to be conducted, a third voltage is provided for the power supply module through the first voltage dividing module, the power supply module judges the voltage value of the detection point of the detection module, when the voltage value is larger than a preset voltage threshold, charging is completed, and the first switch control module is closed.
In one embodiment, the power supply module includes: the device comprises a first diode, a second diode, a third diode, a charging resistor, a second switch control module and a super capacitor;
the anode of the first diode is connected with the power supply input end, and the cathode of the first diode is connected with the power supply output end;
the anode of the second diode is connected with the second end of the charging resistor, and the cathode of the second diode is connected with the first end of the second switch control module;
the first end of the charging resistor is connected with the power supply input end;
the positive electrode of the super capacitor is electrically connected with the second end of the second switch control module and the positive electrode of the third diode respectively;
the cathode of the third diode is connected with a power supply output end;
the third end of the second switch control module is electrically connected with the first voltage division point;
and the negative electrode of the super capacitor is grounded.
In one embodiment, the detection module includes: acceleration capacitor, first detection resistor, second detection resistor and detection point;
the first end of the first detection resistor is electrically connected with the positive electrode of the third diode and the first end of the accelerating capacitor respectively;
the second end of the first detection resistor is electrically connected with the first end of the second detection resistor and the second end of the accelerating capacitor through the detection points respectively;
the second end of the second detection resistor is grounded.
In an embodiment, the first voltage dividing module further includes: the first voltage dividing resistor and the second voltage dividing resistor;
the first end of the first voltage dividing resistor is electrically connected with the first end of the charging resistor;
the second end of the first voltage dividing resistor is electrically connected with the first end of the second voltage dividing resistor through a first voltage dividing point.
In an embodiment, the second voltage dividing module further includes: a third voltage dividing resistor and a fourth voltage dividing resistor;
the second end of the third voltage dividing resistor is electrically connected with the first end of the fourth voltage dividing resistor through the second voltage dividing point;
the second end of the fourth voltage dividing resistor is grounded.
In one embodiment, the current limiting module includes: the first current limiting resistor and the second current limiting resistor;
the first end of the first current limiting resistor is connected with the first end of the charging resistor;
the second end of the first current limiting resistor is connected with the first end of the second current limiting resistor.
In one embodiment, a first end of the first switch control module is connected with a second end of the second voltage dividing resistor;
the second end of the first switch control module is connected with the second voltage division point;
the third end of the first switch control module is grounded.
In one embodiment, the reference module is a reference voltage chip, the reference voltage chip comprising: a voltage sampling pin;
the voltage sampling pin is electrically connected with the detection point;
the cathode of the reference voltage chip is electrically connected with the second end of the second current limiting resistor;
the anode of the reference voltage chip is grounded.
In an embodiment, the first switch control module includes a first field effect transistor, and the second switch control module includes a second field effect transistor.
In one embodiment, the first field effect transistor is an N-channel enhancement mode field effect transistor, and the second field effect transistor is a P-channel enhancement mode field effect transistor.
Embodiments of the present utility model have the following advantages:
according to the standby power management device provided by the utility model, after the standby power management device is electrified, the reference module outputs the first voltage, the first voltage is divided by the second voltage dividing module and then is input into the first switch control module, the first switch control module is controlled to be conducted, the first voltage dividing module is used for providing the third voltage for the power supply module, the power supply module judges the voltage value of the detection point of the detection module, and when the voltage value is larger than the preset voltage threshold, the charging is completed, and the first switch control module is closed. When the super capacitor with lower withstand voltage is used, stable standby power supply can be provided under wider input voltage, and when the system works normally, the post-stage power supply does not need the super capacitor to provide output, so that the charge and discharge times of the super capacitor can be reduced, the service life of the super capacitor is prolonged, and the material cost is reduced.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic structure of a standby power management apparatus according to an embodiment of the present application;
FIG. 2 shows a schematic circuit diagram of a power module;
fig. 3 shows a schematic circuit diagram of the standby power management device.
Description of main reference numerals:
10-a current limiting module; 20-a reference module; 30-a second voltage dividing module; 40-a first switch control module; 50-a first voltage dividing module; 60-a power supply module; 70-a detection module; 61-a second switch control module; a-a first partial pressure point; b-a second partial pressure point; c-detecting point.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Example 1
The embodiment of the application provides a standby power management device, which can be applied to various industrial electronic equipment, when the electronic equipment is powered off, a system needs to maintain a certain working time to backup data, and the standby power management device can meet the standby power demand only by a super capacitor with a certain voltage withstand level.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a standby power management apparatus according to an embodiment of the present application, including: the power supply module 60, the first voltage division module 50, the second voltage division module 30, the current limiting module 10, the first switch control module 40, the second switch control module 61, the reference module 20 and the detection module 70; the power supply module 60 is electrically connected with the current limiting module 10; the current limiting module 10 is also electrically connected with the reference module 20 and the second voltage dividing module 30, respectively; the power supply module 60 is further electrically connected to a first voltage division point a of the first voltage division module 50; the first switch control module 40 is electrically connected with the second voltage division point B of the second voltage division module 30; the first switch control module 40 is electrically connected with the first voltage dividing module 50; the detection module 70 is electrically connected to the power supply module 60 and the reference module 20, respectively.
After power-on, the reference module outputs a first voltage, the first voltage is divided by the second voltage dividing module and then is input into the first switch control module 40, the first switch control module 40 is controlled to be turned on, the first voltage dividing point A is used for realizing voltage division, the second switch control module 61 is turned on, the power supply module 60 provides a third voltage by the second switch control module 61, the detection module 70 judges the voltage value of the detection point C of the detection module, when the voltage value is larger than a preset voltage threshold, charging is completed, the first switch control module is turned off, and the second switch control module is turned off.
It should be understood that, after the power is applied, the voltage flows to the reference module 20 through the current limiting module 10, the initial external voltage value of the reference module 20 is smaller than the internal reference voltage value, the reference module 20 outputs a high level to the second voltage dividing module 30, the voltage value of the voltage dividing point B is greater than the conduction threshold value after the voltage is divided by the second voltage dividing module 30, the first switch control module 40 is turned on, the voltage flows through the first voltage dividing module 50, the voltage value of the first voltage dividing point a is detected to be smaller than the voltage threshold value after the voltage is divided by the first voltage dividing module 50, the second switch control module 61 in the power supply module 60 is turned on, the power supply module 60 starts to charge the stored voltage VCAP, the detection point voltage of the detection module 70 is greater than the internal reference voltage value of the reference module 20 after the charging is completed, the first switch control module 40 is turned off, the second switch control module 61 in the power supply module 60 is turned off, and the power supply module 60 stops charging the stored voltage VCAP.
It is further understood that in the present embodiment, the first voltage is a high voltage, the voltage after passing through the second voltage dividing module 30 is a low voltage greater than 2V and less than 20V, and the third voltage provided to the second switch module 61 through the first voltage dividing module 50 is a voltage less than 2V to 20V.
Referring to fig. 2, fig. 2 shows a schematic circuit diagram of a power supply module 60, the power supply module 60 comprising: the first diode D1, the second diode D2, the third diode D3, the charging resistor R1, the second switch control module 61 and the super capacitor C1; the positive electrode of the first diode D1 is connected with the power supply input end, and the negative electrode of the first diode D1 is connected with the power supply output end VOUT; the positive electrode of the second diode D2 is connected to the second end of the charging resistor R1, and the negative electrode of the second diode D2 is connected to the first end of the second switch control module 61; the first end of the charging resistor R1 is connected with a power supply input end VIN; the positive electrode of the super capacitor C1 is electrically connected with the second end of the second switch control module 61 and the positive electrode of the third diode D3 respectively; the cathode of the third diode D3 is connected with the power supply output end VOUT; a third end of the second switch control module 61 is electrically connected with the first voltage division point a; and the negative electrode of the super capacitor C1 is grounded.
It should be understood that, during normal operation, the voltage of the power supply input end is greater than the energy storage voltage VCAP, and the power supply input end VIN directly provides output to the power supply output end through the first diode D1; when the power supply input end VIN is disconnected, the voltage of the power supply output end VOUT drops, and when the voltage drops to enable the energy storage voltage VCAP to be larger than the power supply output end VOUT, the energy storage voltage serves as a standby power supply and continuously provides output for the power supply output end VOUT through the third diode D3.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of the standby power management apparatus. In one embodiment, the detection module 70 includes: acceleration capacitor C2, first detection resistor R4, second detection resistor R8 and detection point C; the first end of the first detection resistor R4 is electrically connected with the positive electrode of the third diode D3 and the first end of the accelerating capacitor C2 respectively; the second end of the first detection resistor R4 is electrically connected with the first end of the second detection resistor R8 and the second end of the acceleration capacitor C2 through the detection point C; the second end of the second detection resistor R8 is grounded.
It should be noted that, when the energy storage voltage has an instantaneous voltage spike, since the voltages at the two ends of the accelerating capacitor C2 cannot be suddenly changed, the two ends of the accelerating capacitor C2 are equivalent to a short circuit, and the spike voltage can directly pass through the accelerating capacitor C2 to the voltage sampling pin VREF. In a normal steady state, the voltage is sampled to the pin VREF through the first detection resistor R4.
Further, the first detection resistor R4 and the second detection resistor R8 are divided, and the voltage detection point C connected between them is connected to the voltage sampling pin VREF of the reference voltage chip U1, so as to detect the stored voltage. The accelerating capacitor C2 can improve the output response of the reference voltage chip U1. When the voltage value at two ends of the second detection resistor R8 exceeds 2.495V, the cathode of the reference voltage chip U1 outputs low level of about 2V, and the super capacitor stops charging.
In one embodiment, the first voltage dividing module 50 further includes: a first voltage dividing resistor R3 and a second voltage dividing resistor R6; the first end of the first voltage dividing resistor R3 is electrically connected with the first end of the charging resistor R1; the second end of the first voltage dividing resistor R3 is electrically connected with the first end of the second voltage dividing resistor R6 through a first voltage dividing point A.
It should be noted that, after the first switch control module 40 is turned on, the voltage flows to the second switch control module 61 through the second voltage dividing resistor R6, and in this embodiment, when the voltage value of the second voltage dividing point is detected to be less than 1V, the second switch control module 61 is turned on. In other embodiments, the second switch module 61 may be a P-channel enhancement type fet Q2 of different types, and the set threshold voltage is determined according to the type.
In one embodiment, the second voltage dividing module 30 further includes: a third voltage dividing resistor R7 and a fourth voltage dividing resistor R9; the second end of the third voltage dividing resistor R7 is electrically connected with the first end of the fourth voltage dividing resistor R9 through the second voltage dividing point B; the second end of the fourth voltage dividing resistor R9 is grounded.
It should be understood that, after the power is turned on, the voltage flows to the third voltage dividing resistor R7 through the current limiting module 10, and in this embodiment, when the second voltage dividing point B of the second voltage dividing module 30 is detected to be greater than a certain threshold, the first switch control module 40 is turned on. In other embodiments, the first switch control module 40 may be an N-channel enhancement type fet Q1 of different models, and the set threshold voltage is determined according to the model.
In one embodiment, the current limiting module 10 includes: the first current limiting resistor R2 and the second current limiting resistor R5; the first end of the first current limiting resistor R2 is connected with the first end of the charging resistor R1; the second end of the first current limiting resistor R2 is connected with the first end of the second current limiting resistor R5.
It should be noted that, the first current limiting resistor R2 and the second current limiting resistor R5 are connected in series to supply power to the reference module 20, and the first current limiting resistor R2 and the second current limiting resistor R5 are both large-resistance resistors, so that power can be shared, and heat generation is reduced.
In an embodiment, a first end of the first switch control module 40 is connected to a second end of the second voltage dividing resistor R6; the second end of the first switch control module 40 is connected to the second voltage division point B; the third end of the first switch control module 40 is grounded.
It should be noted that, the first switch control module 40 is an N-channel enhancement type field effect transistor Q1, the first end is a drain electrode of the N-channel enhancement type field effect transistor, the second end is a gate electrode of the N-channel enhancement type field effect transistor Q1, and the third end is a source electrode of the N-channel enhancement type field effect transistor Q1. In this embodiment, after power is applied, when the voltage value of the second voltage division point B is detected to be greater than the conduction threshold value, the N-channel enhancement type field effect transistor Q1 is controlled to be turned on via the gate.
In one embodiment, the reference voltage module is a reference voltage chip, the reference voltage chip comprising: a voltage sampling pin VREF; the voltage sampling pin VREF is electrically connected with the detection point C; the cathode of the reference voltage chip U1 is electrically connected with the second end of the second current limiting resistor R5; the anode of the reference voltage chip U1 is grounded.
It should be understood that in the present embodiment, the model TL431 of the reference voltage chip U1 is used, and the reference voltage chip U1 corresponds to a voltage comparator, and when the voltage sampling pin VREF exceeds the internal reference voltage by 2.495V, the cathode thereof outputs a low level of about 2V.
In one embodiment, the first switch control module 40 is an N-channel enhancement type fet Q1, and the second switch control module is a P-channel enhancement type fet Q2.
It should be noted that, when the capacitor C1 is powered on for the first time, since the accelerating capacitor C1 is not powered on, the voltage sampling pin VREF is smaller than 2.495V of the reference voltage inside the reference voltage chip U1, the cathode output of the reference voltage chip U1 is approximately equal to the high level of the power supply input terminal VIN, the high level is divided by the third voltage dividing resistor R7 and the fourth voltage dividing resistor R9, the detected flowing voltage is higher than the voltage threshold, the first switch control module 40 is controlled to be turned on, the first switch control module 40 is connected in series to the power supply input terminal VIN after being turned on, the first voltage dividing resistor R3 and the second voltage dividing resistor R6 form a divided voltage, the detected flowing voltage is lower than the voltage threshold, and the second switch control module 61 is turned on; the second switch control module 61 is conducted, and then the power supply input end charges the super capacitor C1 through the charging resistor R1 and the second diode D2 to the second switch control module 61; when the charging is performed to a certain voltage, it is detected that the voltage sampling pin VREF connected to the detection point is greater than 2.495V, the cathode output of the reference voltage chip U1 is about equal to a low level of 2V, and due to the existence of the voltage division of the third voltage dividing resistor R7 and the fourth voltage dividing resistor R9, it is detected that the voltage of the detection point C is lower than the gate-on voltage threshold of the first switch control module 40, the first switch control module 40 is turned off, the second switch control module 61 is turned off, and the charging is stopped. The super capacitor C1 is charged, and the energy storage voltage VCAP of the super capacitor is vcap= (r4/r8+1) ×2.495V.
In the standby power management device provided by the utility model, after the standby power management device is powered on, the reference module 20 outputs a first voltage, the first voltage is divided by the second voltage dividing module and then is input into the first switch control module 40, the first switch control module 40 is controlled to be turned on, a third voltage is provided to the power supply module 60 through the first voltage dividing module 50, the power supply module 60 determines the voltage value of the detection point C of the detection module, and when the voltage value is greater than a preset voltage threshold, charging is completed, and the first switch control module 40 is turned off. When the super capacitor C1 with lower withstand voltage is used, stable standby power supply can be provided under wider input voltage, and when the system works normally, the post-stage power supply does not need the super capacitor C1 to provide output, so that the charge and discharge times of the super capacitor C1 can be reduced, the service life of the super capacitor C1 is prolonged, and the material cost is reduced.
Any particular values in all examples shown and described herein are to be construed as merely illustrative and not a limitation, and thus other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
The above examples merely represent a few embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (10)
1. A standby power management apparatus, comprising: the device comprises a power supply module, a first voltage division module, a second voltage division module, a current limiting module, a first switch control module, a reference module and a detection module;
the power supply module is electrically connected with the current limiting module;
the current limiting module is also respectively and electrically connected with the reference module and the second voltage dividing module;
the power supply module is also electrically connected with a first voltage division point of the first voltage division module;
the first switch control module is electrically connected with a second voltage division point of the second voltage division module;
the first switch control module is electrically connected with the first voltage dividing module;
the detection module is respectively and electrically connected with the power supply module and the reference module;
after power-on, the reference module outputs a first voltage, the first voltage is divided by the second voltage dividing module and then is input into the first switch control module, the first switch control module is controlled to be conducted, a third voltage is provided for the power supply module through the first voltage dividing module, the power supply module judges the voltage value of the detection point of the detection module, when the voltage value is larger than a preset voltage threshold, charging is completed, and the first switch control module is closed.
2. The backup power management apparatus of claim 1, wherein the power supply module comprises: the device comprises a first diode, a second diode, a third diode, a charging resistor, a second switch control module and a super capacitor;
the anode of the first diode is connected with the power supply input end, and the cathode of the first diode is connected with the power supply output end;
the anode of the second diode is connected with the second end of the charging resistor, and the cathode of the second diode is connected with the first end of the second switch control module;
the first end of the charging resistor is connected with the power supply input end;
the positive electrode of the super capacitor is electrically connected with the second end of the second switch control module and the positive electrode of the third diode respectively;
the cathode of the third diode is connected with a power supply output end;
the third end of the second switch control module is electrically connected with the first voltage division point;
and the negative electrode of the super capacitor is grounded.
3. The backup power management apparatus of claim 2, wherein the detection module comprises: acceleration capacitor, first detection resistor, second detection resistor and detection point;
the first end of the first detection resistor is electrically connected with the positive electrode of the third diode and the first end of the accelerating capacitor respectively;
the second end of the first detection resistor is electrically connected with the first end of the second detection resistor and the second end of the accelerating capacitor through the detection points respectively;
the second end of the second detection resistor is grounded.
4. The backup power management apparatus of claim 2, wherein the first voltage dividing module further comprises: the first voltage dividing resistor and the second voltage dividing resistor;
the first end of the first voltage dividing resistor is electrically connected with the first end of the charging resistor;
the second end of the first voltage dividing resistor is electrically connected with the first end of the second voltage dividing resistor through a first voltage dividing point.
5. The backup power management apparatus of claim 1, wherein the second voltage dividing module further comprises: a third voltage dividing resistor and a fourth voltage dividing resistor;
the second end of the third voltage dividing resistor is electrically connected with the first end of the fourth voltage dividing resistor through the second voltage dividing point;
the second end of the fourth voltage dividing resistor is grounded.
6. The backup power management apparatus of claim 2, wherein the current limiting module comprises: the first current limiting resistor and the second current limiting resistor;
the first end of the first current limiting resistor is connected with the first end of the charging resistor;
the second end of the first current limiting resistor is connected with the first end of the second current limiting resistor.
7. The backup power management apparatus of claim 4, wherein a first terminal of the first switch control module is connected to a second terminal of the second voltage divider resistor;
the second end of the first switch control module is connected with the second voltage division point;
the third end of the first switch control module is grounded.
8. The backup power management apparatus of claim 6, wherein the reference module is a reference voltage chip comprising: a voltage sampling pin;
the voltage sampling pin is electrically connected with the detection point;
the cathode of the reference voltage chip is electrically connected with the second end of the second current limiting resistor;
the anode of the reference voltage chip is grounded.
9. The backup power management apparatus of claim 2, wherein the first switch control module comprises a first field effect transistor and the second switch control module comprises a second field effect transistor.
10. The standby power management apparatus of claim 9, wherein the first fet is an N-channel enhancement fet and the second fet is a P-channel enhancement fet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322169123.5U CN220711168U (en) | 2023-08-11 | 2023-08-11 | Standby power supply management device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322169123.5U CN220711168U (en) | 2023-08-11 | 2023-08-11 | Standby power supply management device |
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| Publication Number | Publication Date |
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| CN220711168U true CN220711168U (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322169123.5U Active CN220711168U (en) | 2023-08-11 | 2023-08-11 | Standby power supply management device |
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| CN (1) | CN220711168U (en) |
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2023
- 2023-08-11 CN CN202322169123.5U patent/CN220711168U/en active Active
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