CN214125145U - Power-down retaining device for switching power supply - Google Patents
Power-down retaining device for switching power supply Download PDFInfo
- Publication number
- CN214125145U CN214125145U CN202023066950.4U CN202023066950U CN214125145U CN 214125145 U CN214125145 U CN 214125145U CN 202023066950 U CN202023066950 U CN 202023066950U CN 214125145 U CN214125145 U CN 214125145U
- Authority
- CN
- China
- Prior art keywords
- super capacitor
- diode
- power
- power supply
- power tube
- 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
- Stand-By Power Supply Arrangements (AREA)
- Dc-Dc Converters (AREA)
Abstract
The embodiment of the utility model discloses a switching power supply power down holding device, including super capacitor charging module, super capacitor group, diode D1, diode D2, super capacitor discharging module, first redundant circuit, power tube Q1, power tube Q2 and second redundant circuit; the first input end of the super capacitor charging module is connected with the source electrode of a power tube Q1 and then connected with a switching power supply, the second output end of the super capacitor charging module is connected with one end of a super capacitor bank and the anode of a diode D2, the cathode of the diode D1 is connected with the cathode of a diode D2 and then connected with the first input end of the super capacitor discharging module, the first output end of the super capacitor discharging module is connected with the source electrode of the power tube Q2, the grid electrode of the power tube Q2 is connected with one end of a first redundancy circuit, and the drain electrode of the power tube Q2 is connected with the drain electrode of the power tube Q1 and then connected with a load. The utility model discloses it is even longer to make the power down hold time reach minute level, adjusts the power down hold time nimble, and is small.
Description
Technical Field
The embodiment of the utility model provides a relate to switching power supply technical field, especially relate to a switching power supply falls electric keeper.
Background
A switching power supply is a commonly used power supply device for maintaining a stable output voltage by controlling the on/off time ratio of a power switch tube. Different application scenarios are different in the time length of power-down holding of the switching power supply, in some special application scenarios, the power-down holding time of the switching power supply is long, even the requirement reaches more than the minute level, the traditional mode of power-down holding of the switching power supply is that a battery is used, but the battery is easy to leak, and is large in size, and low temperature is easy to freeze, and the battery weight is easy to exceed the standard, and when the power of the switching power supply is not large, the battery capacity is difficult to adjust to adapt to the cost, and meanwhile, the switching power supply of the standard is required to be used in many occasions, and long power-down holding time is required, the traditional battery scheme is difficult to satisfy, and the power-down holding time is inconvenient to adjust. The above problems are urgently needed to be solved.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a power down maintaining device for a switching power supply, which solves the above mentioned problems in the background art.
In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:
the embodiment of the utility model provides a switching power supply falls electric keeper, the device includes that super capacitor charges module, super capacitor group, diode D1, diode D2, super capacitor discharge module, first redundant circuit, power tube Q1, power tube Q2 and second redundant circuit; the first input end of the super capacitor charging module is connected with the anode of a diode D1 and the source of a power tube Q1 and then connected with the output voltage Vout of a switching power supply, the second input end of the super capacitor charging module is connected with the switching power supply and then connected with the ground GND, the first output end of the super capacitor charging module is connected with the ground GND, the second output end of the super capacitor charging module is connected with one end of a super capacitor bank and the anode of a diode D2, the other end of the super capacitor bank is connected with the ground GND, the cathode of a diode D1 is connected with the cathode of a diode D2 and then connected with the first input end of a super capacitor discharging module, the second input end of the super capacitor discharging module is connected with the ground GND, the first output end of the super capacitor discharging module is connected with the source of a power tube Q2, the second output end of the super capacitor discharging module is connected with the ground GND, the gate of a power tube Q2 is connected with one end of a first redundant circuit, and the other end of the first redundant circuit is connected with the ground GND, the drain of the power tube Q2 is connected to the drain of the power tube Q1 and then to the output voltage, the gate of the power tube Q1 is connected to one end of the second redundant circuit, and the other end of the second redundant circuit is grounded to GND.
Preferably, the power-down maintaining device for the switching power supply further comprises a super-capacitor voltage-sharing module, one end of the super-capacitor voltage-sharing module is connected with the anode of the diode D2, and the other end of the super-capacitor voltage-sharing module is grounded to GND.
Preferably, the power transistor Q1 and the power transistor Q2 both use N-channel MOS transistors.
The utility model discloses technical scheme not only can make switching power supply's the power failure hold time reach minute level even longer, and adjusting switching power supply power failure hold time is more nimble moreover, and is efficient, and input impulse current is little, and is small, suitable popularization and application.
Drawings
In order to more clearly illustrate and understand the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the background and embodiments of the present invention will be briefly introduced 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 contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a structure diagram of a power down holding device for a switching power supply according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a structural diagram of a power down maintaining device of a switching power supply according to an embodiment of the present invention. The embodiment provides a switch power supply power-down maintaining device which comprises a super capacitor charging module U1, a super capacitor group, a diode D1, a diode D2, a super capacitor discharging module U2, a first redundant circuit U3, a power tube Q1, a power tube Q2 and a second redundant circuit U4. A first input end of the super capacitor charging module U1 is connected with an anode of a diode D1 and a source of a power tube Q1 and then connected with an output voltage Vout of a switch power supply U5, a second input end of the super capacitor charging module U1 is connected with a switch power supply U5 and then connected with a ground GND, a first output end of the super capacitor charging module U1 is connected with a ground GND, a second output end of the super capacitor charging module U1 is connected with one end of a super capacitor group and an anode of the diode D2, the other end of the super capacitor group is connected with the ground GND, a cathode of a diode D1 is connected with a cathode of a diode D2 and then connected with a first input end of a super capacitor discharging module U2, a second input end of the super capacitor discharging module U2 is connected with the ground GND, a first output end of the super capacitor discharging module U2 is connected with a source of the power tube Q2, a second output end of the super capacitor discharging module U2 is connected with the ground, a gate of a power tube Q2 is connected with one end of a first redundant circuit U3, the other end of the first redundant circuit U3 is grounded GND, the drain of the power tube Q2 is connected with the drain of the power tube Q1 and then connected with the output voltage, the grid of the power tube Q1 is connected with one end of the second redundant circuit U4, and the other end of the second redundant circuit U4 is grounded GND.
Illustratively, the switch power-down maintaining device in this embodiment further includes a super capacitor voltage equalizing module U6, where one end of the super capacitor voltage equalizing module U6 is connected to the anode of the diode D2, and the other end is connected to the ground GND. In the present embodiment, for example, N-channel MOS transistors are used for the power transistor Q1 and the power transistor Q2. Illustratively, in this embodiment, the supercapacitor bank is formed by connecting an electrolytic capacitor C1 and an electrolytic capacitor C2 … in series in sequence.
When the switch power supply U5 works, the switch power supply U5 supplies power to a load R1 through a second redundancy circuit U4, one branch of the switch power supply U5 charges the super capacitor bank through a super capacitor charging module U1, and when the switch power supply U5 loses power, the super capacitor bank supplies power to a load R1 through a super capacitor discharging module U2, a first redundancy circuit U3 and a power tube Q2 in a redundant mode to achieve the purpose of continuing the work of the power supply. It should be noted that, when the switching power supply U5 normally operates, the super capacitor charging module U1 operates, and the super capacitor discharging module U2 is in a standby state, in this embodiment, the voltage boost value of the voltage boost module in the line must be lower than the VOUT voltage, otherwise, the super capacitor discharging module U2 intervenes in the operation when the switching power supply normally operates, and the efficiency and reliability of the power supply are further reduced.
The utility model discloses technical scheme not only can make switching power supply's the power failure hold time reach minute level even longer, and adjusting switching power supply power failure hold time is more nimble moreover, and is efficient, and input impulse current is little, and is small, suitable popularization and application.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (3)
1. A power-down maintaining device of a switching power supply is characterized by comprising a super capacitor charging module, a super capacitor group, a diode D1, a diode D2, a super capacitor discharging module, a first redundant circuit, a power tube Q1, a power tube Q2 and a second redundant circuit; the first input end of the super capacitor charging module is connected with the anode of a diode D1 and the source of a power tube Q1 and then connected with the output voltage Vout of a switching power supply, the second input end of the super capacitor charging module is connected with the switching power supply and then connected with the ground GND, the first output end of the super capacitor charging module is connected with the ground GND, the second output end of the super capacitor charging module is connected with one end of a super capacitor group and the anode of a diode D2, the other end of the super capacitor group is connected with the ground GND, the cathode of a diode D1 is connected with the cathode of a diode D2 and then connected with the first input end of a super capacitor discharging module, the second input end of the super capacitor discharging module is connected with the ground GND, the first output end of the super capacitor discharging module is connected with the source of the power tube Q2, the second output end of the super capacitor discharging module is connected with the ground GND, the gate of the power tube Q2 is connected with one end of a first redundant circuit, the other end of the first redundant circuit is connected with the ground GND, the drain of the power tube Q2 is connected to the drain of the power tube Q1 and then to the output voltage, the gate of the power tube Q1 is connected to one end of the second redundant circuit, and the other end of the second redundant circuit is grounded to GND.
2. The device for maintaining the power failure of the switching power supply according to claim 1, further comprising a super capacitor voltage equalizing module, wherein one end of the super capacitor voltage equalizing module is connected to the anode of the diode D2, and the other end of the super capacitor voltage equalizing module is connected to the ground GND.
3. The power-down maintaining device for the switching power supply according to any one of claims 1 or 2, wherein the power transistor Q1 and the power transistor Q2 both use N-channel MOS transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023066950.4U CN214125145U (en) | 2020-12-17 | 2020-12-17 | Power-down retaining device for switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023066950.4U CN214125145U (en) | 2020-12-17 | 2020-12-17 | Power-down retaining device for switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214125145U true CN214125145U (en) | 2021-09-03 |
Family
ID=77512136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023066950.4U Active CN214125145U (en) | 2020-12-17 | 2020-12-17 | Power-down retaining device for switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214125145U (en) |
-
2020
- 2020-12-17 CN CN202023066950.4U patent/CN214125145U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201256290Y (en) | Protection circuit for suppressing surge current and preventing input voltage reverse connection | |
| CN103501031B (en) | A kind of super capacitor charging control circuit | |
| CN201001039Y (en) | Great current DC power supply instant power-off retaining circuit | |
| CN102025272A (en) | Discharging circuit | |
| CN113741261B (en) | Power-on and power-off control circuit and signal output device | |
| CN214125145U (en) | Power-down retaining device for switching power supply | |
| CN210639587U (en) | Power-off fast discharge circuit of switching Power supply, server mainboard and server | |
| CN111030077A (en) | Shunt regulation circuit for solar cell array switch and regulation method based on shunt regulation circuit | |
| CN108964081B (en) | Circuit structure applied to stabilizing output of micro-grid energy storage system | |
| CN101420123B (en) | Solar energy controller preventing reverse connection of accumulator | |
| CN212435364U (en) | System power supply device of photovoltaic inverter and photovoltaic inverter | |
| CN213585190U (en) | Power control circuit with standby low power consumption | |
| CN212163174U (en) | Flyback converter with power failure holding function | |
| CN211981525U (en) | Super capacitor charge-discharge module and power terminal | |
| CN111082546B (en) | Digital control energy collection management circuit with low power starting and voltage monitoring functions | |
| CN203708096U (en) | Power supply protection circuit and power supply | |
| CN111628560A (en) | Solar energy power supply | |
| CN219999082U (en) | Remote measuring terminal power supply system | |
| CN216872914U (en) | Low-cost power automatic switching circuit | |
| CN109450071A (en) | A kind of power switching circuit | |
| CN221080944U (en) | Charging and discharging wake-up circuit and energy storage device | |
| CN216016838U (en) | Double-input power supply standby power switching circuit | |
| CN204230997U (en) | A kind of power circuit based on capacitance energy storage | |
| CN212572115U (en) | Multi-section efficient super capacitor charging and discharging management circuit suitable for TTU | |
| CN214755646U (en) | Data protection circuit after power supply is turned off |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |