CN220711165U - Multi-input seamless switching controller and power supply system - Google Patents
Multi-input seamless switching controller and power supply system Download PDFInfo
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- CN220711165U CN220711165U CN202321912801.6U CN202321912801U CN220711165U CN 220711165 U CN220711165 U CN 220711165U CN 202321912801 U CN202321912801 U CN 202321912801U CN 220711165 U CN220711165 U CN 220711165U
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- 101100102627 Oscarella pearsei VIN1 gene Proteins 0.000 description 11
- 101150098959 MON1 gene Proteins 0.000 description 4
- 101100291875 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) apg-13 gene Proteins 0.000 description 4
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- 101000624382 Homo sapiens Protein MON2 homolog Proteins 0.000 description 2
- 102100023396 Protein MON2 homolog Human genes 0.000 description 2
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Abstract
The utility model relates to the technical field of multipath power supply circuits and discloses a multi-input seamless switching controller and a power supply system, wherein the multi-input seamless switching controller comprises a control chip, a plurality of input ends of the control chip are respectively and correspondingly connected with a field effect tube, a source electrode and a grid electrode of any one of the field effect tubes are respectively and correspondingly connected with an input end and a driving end corresponding to the control chip, and a drain electrode of the field effect tube is connected with an output end of the control chip; when multiple paths of inputs are simultaneously accessed, the input source power supply with high voltage is automatically selected, the high voltage is automatically and seamlessly switched to other paths of input source power supply after power failure or reduction, the high voltage is automatically recovered to the high voltage power supply after recovery, the low power consumption of a device can be truly realized, the independent and seamless switching of the multiple paths of power supplies is controlled by a single chip, and the time switching time does not exist.
Description
Technical Field
The utility model relates to the technical field of multipath power supply circuits, in particular to a multiple-input seamless switching controller and a power supply system.
Background
At present, in a power supply system, a plurality of switching schemes aiming at multiple input sources and hot backup redundancy design are adopted, the scheme mostly adopts an output end series diode backflow prevention design or adopts a switching device such as a relay to control, but the problems exist in the automatic switching process of the input sources applied to a power supply. When the scheme of serially connected diodes is adopted, seamless switching can be realized, but the power consumption of the device is higher, and the efficiency of the whole machine is lower; when switching by using a switching device such as a relay, the power consumption is reduced, but certain switching time exists in the switching process, the power supply is instantaneously interrupted in the switching process, the real seamless switching cannot be realized, and the influence of instantaneous power failure on the subsequent-stage electric equipment can be caused.
At present, a mode of driving the field effect transistor by using a controller is also available, basically, only one controller can drive one input, and a plurality of circuits are needed to control in the application of a multi-input power supply, so that the cost is high, the volume is large, and the failure rate of equipment is increased.
Disclosure of Invention
The utility model aims to provide a multi-input seamless switching controller and a power supply system, which can automatically select an input source with high voltage to supply power when multiple paths of inputs are simultaneously accessed, automatically and seamlessly switch to other paths of input sources to supply power after the high voltage is powered down or reduced, automatically recover to high voltage to supply power after the high voltage is recovered, really realize low power consumption of a device, and control the autonomous seamless switching of the multiple paths of power by a single chip, and have no time switching time.
The utility model is realized in the following way:
the multi-input seamless switching controller comprises a control chip, wherein a plurality of input ends of the control chip are respectively and correspondingly connected with a field effect tube, a source electrode and a grid electrode of any one field effect tube are respectively and correspondingly connected with the corresponding input end and the driving end of the control chip, and a drain electrode of the field effect tube is connected with the output end of the control chip.
Further, the control chip U1 is connected with a protection unit, the protection unit includes a voltage dividing resistor group respectively corresponding to and connected with a plurality of input ends of the control chip U1, any one of the voltage dividing resistor groups includes a first resistor with one end connected with the input end corresponding to the control chip U1, the other end of the first resistor is respectively connected with the detection end corresponding to the control chip U1 and one end of a second resistor, and the other end of the second resistor is connected with the ground.
Further, the protection unit further includes a fuse tube correspondingly connected to the plurality of input ends of the control chip U1, and one end of any one of the fuse tubes is simultaneously connected to the source electrode of the corresponding field effect tube.
Further, the control chip U1 is connected with a state prompt unit, the state prompt unit comprises a prompt group correspondingly connected with a plurality of prompt ends of the control chip U1 respectively, any one of the prompt groups comprises a prompt resistor with one end connected with the output end of the control chip U1, the other end of the prompt resistor is connected with the prompt end corresponding to the control chip U1 and the anode of the light emitting diode simultaneously, and the cathode of the light emitting diode is connected with the ground.
A multi-input seamless switching power supply system comprises the multi-input seamless switching controller.
Compared with the prior art, the utility model has the beneficial effects that:
the drains of the field effect transistors are connected with the output end of the control chip U1, the model of the control chip U1 is preferably LTC4359, the control chip U1 is provided with three input ends, namely an IN1 end, an IN2 end and an IN3 end, which are respectively corresponding to the three input ends VIN1 end, VIN2 end and VIN3 end of the controller, and respectively corresponding to the three field effect transistors Q1, Q2 and Q3, the three driving ends of the control chip U1 are respectively a GATE1 end, a GATE2 end and a GATE3 end, and the output end of the control chip U1 is an OUT end; when three paths of inputs are simultaneously accessed, the input voltage VIN1 is supposed to be larger than VIN2 and VIN3, due to the power supply characteristic of a power supply, the voltage regulator works, at the moment, VIN1 supplies power, the output voltage VOUT=VID1-VSD 1 (the VSD1 is the voltage drop after the field effect transistor Q1 is completely conducted, and is very small), at the moment, VOUT is higher than VIN2 and VIN3, the driving end GATE1 is started, GATE2 and GATE3 are closed, the field effect transistors Q2 and Q3 are closed, and the output voltage is forbidden to flow backwards and return to VIN2 and VIN3. When VIN1 fails and is powered down, the diode in the field effect transistor Q2 is switched to VIN2 to supply power in a seamless way due to forward conduction; similarly, when VIN2 is powered down, it will be switched to VIN3 to supply power seamlessly, where vout=vin3-vsd3. When VIN2 is recovered to be normal, VIN2 is larger than VOUT, GATE2 is opened, GATE3 is closed, and power supply is switched to VIN 2; similarly, when VIN1 is recovered, GATE1 is turned on, GATE2 and GATE3 are turned off, and power supply is switched to VIN 1; when multiple paths of inputs are simultaneously accessed, the input source power supply with high voltage is automatically selected, the high voltage is automatically and seamlessly switched to other paths of input source power supply after power failure or reduction, the high voltage is automatically recovered to the high voltage power supply after recovery, the low power consumption of a device can be truly realized, the independent and seamless switching of the multiple paths of power supplies is controlled by a single chip, and the time switching time does not exist.
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 examples 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 is a schematic diagram of a circuit configuration of a multiple input seamless handover controller according to the present utility model;
FIG. 2 is a schematic diagram of an application scheme of a multi-input seamless switching power supply system according to the present utility model;
fig. 3 is a schematic structural diagram of another application scheme of a multiple-input seamless switching power supply system according to the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.
Referring to fig. 1, a multi-input seamless switching controller includes a control chip, wherein a plurality of input ends of the control chip are respectively and correspondingly connected with a field effect tube, a source electrode and a grid electrode of any one of the field effect tubes are respectively and correspondingly connected with a corresponding input end and a driving end of the control chip, and a drain electrode of the field effect tube is connected with an output end of the control chip.
IN practical application, the drains of the field effect transistors are all connected with the output end of the control chip U1, the model of the control chip U1 is preferably LTC4359, the control chip U1 has three input ends, i.e., an IN1 end, an IN2 end and an IN3 end, which are respectively corresponding to the three input ends VIN1, VIN2 end and VIN3 of the present controller, respectively corresponding to the three field effect transistors Q1, Q2 and Q3, the three driving ends of the control chip U1 are respectively a GATE1 end, a GATE2 end and a GATE3 end, and the output end of the control chip U1 is an OUT end; when three paths of inputs are simultaneously accessed, the input voltage VIN1 is supposed to be larger than VIN2 and VIN3, due to the power supply characteristic of a power supply, the voltage regulator works, at the moment, VIN1 supplies power, the output voltage VOUT=VID1-VSD 1 (the VSD1 is the voltage drop after the field effect transistor Q1 is completely conducted, and is very small), at the moment, VOUT is higher than VIN2 and VIN3, the driving end GATE1 is started, GATE2 and GATE3 are closed, the field effect transistors Q2 and Q3 are closed, and the output voltage is forbidden to flow backwards and return to VIN2 and VIN3. When VIN1 fails and is powered down, the diode in the field effect transistor Q2 is switched to VIN2 to supply power in a seamless way due to forward conduction; similarly, when VIN2 is powered down, it will be switched to VIN3 to supply power seamlessly, where vout=vin3-vsd3. When VIN2 is recovered to be normal, VIN2 is larger than VOUT, GATE2 is opened, GATE3 is closed, and power supply is switched to VIN 2; similarly, when VIN1 is recovered, GATE1 is turned on, GATE2 and GATE3 are turned off, and power supply is switched to VIN 1; when multiple paths of inputs are simultaneously accessed, the input source power supply with high voltage is automatically selected, the high voltage is automatically and seamlessly switched to other paths of input source power supply after power failure or reduction, the high voltage is automatically recovered to the high voltage power supply after recovery, the low power consumption of a device can be truly realized, the independent and seamless switching of the multiple paths of power supplies is controlled by a single chip, and the time switching time does not exist.
Referring to fig. 1, the control chip U1 is connected with a protection unit, the protection unit includes a voltage dividing resistor group correspondingly connected to a plurality of input ends of the control chip U1, any one of the voltage dividing resistor groups includes a first resistor with one end connected to the input end corresponding to the control chip U1, the other end of the first resistor is connected to a detection end corresponding to the control chip U1 and one end of a second resistor, and the other end of the second resistor is connected to ground. In this embodiment, the control chip U1 has three detection ends, which are a MON1 end, a MON2 end, and a MON3 end, and when the voltage of the MON1 end is greater than 1.23V, the corresponding GATE1 is output, the field effect transistor Q1 is turned on, and the corresponding voltage dividing resistor group is used to set the starting voltage of the input circuit, so as to implement under-voltage protection. For example, the start voltage of the MON1 end and the IN1 end can be set by the voltage division ratio between the first resistor R1 connected with the input end IN1 and the second resistor R2 connected with the MON1 end, and the MON2 end and the MON3 end are the same as the above, so the controller U1 can control three independent inputs at the same time.
Referring to fig. 1, the protection unit further includes a fuse tube correspondingly connected to the plurality of input ends of the control chip U1, and one end of any one of the fuse tubes is simultaneously connected to the source electrode of the corresponding field effect tube. In this embodiment, the other end of any one of the fuse tubes is a corresponding input end of the controller, and when the voltage input by any one or more of the three input ends VIN1, VIN2 and VIN3 of the controller exceeds the maximum voltage that the corresponding fuse tube can withstand, the corresponding fuse tube will be disconnected, and the input will be blocked forcibly, so as to realize overvoltage protection.
Referring to fig. 1, the control chip U1 is connected with a state prompting unit, the state prompting unit includes a prompting group correspondingly connected to a plurality of prompting ends of the control chip U1, any one of the prompting groups includes a prompting resistor with one end connected to an output end of the control chip U1, the other end of the prompting resistor is connected to the prompting end corresponding to the control chip U1 and an anode of a light emitting diode at the same time, and a cathode of the light emitting diode is connected to the ground. In this embodiment, the VGSFLT end of the control chip U1 is a working state prompt end, and the fuserflt 1 end, the fuserflt 2 end, and the fuserflt 3 end of the control chip U1 are fault state prompt ends corresponding to the field effect transistor respectively; for example, when the controller works normally, the light emitting diode LED1 connected with the VGSFLT end is correspondingly on, and when the control chip U1 detects that any one of the field effect transistors is abnormal, the VGSFLT end is pulled down to GND, and the light emitting diode LED1 is turned off; the signal can also be connected to a post-stage detection circuit, so that the report of the working state is realized; when the voltage input by any one input end of the control chip U1 is higher than 3.5V, the corresponding light-emitting diode connected with the fault state prompting end is on, when the voltage input by any one input end is abnormal, namely the voltage is lower than 3.5V, the corresponding fault state prompting end is pulled down to GND, the corresponding light-emitting diode connected with the fault state prompting end is extinguished, the signal can be connected to a later detection circuit, and the abnormality of which power supply in the system occurs can be detected, so that the system is convenient to check and maintain.
Referring to fig. 2 and 3, a multiple-input seamless switching power supply system includes the multiple-input seamless switching controller. In this embodiment, after the AC-DC converter is added at the front end of the controller, the scheme can be applied to AC-DC power supply switching, and also can be applied to switching among different types of power supply systems such as AC, DC, and battery, as shown in fig. 2, the input sources can be arbitrarily combined, and the scheme can be widely applied in the fields of UPS, redundancy design, and the like; through cascade connection of a plurality of controllers, the method can be further applied to power supply systems with more than three paths of inputs to achieve seamless switching, and is flexible in design and wide in application, as shown in fig. 3.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, and various modifications and variations may be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (4)
1. A multi-input seamless switching controller, characterized by: the device comprises a control chip, wherein a plurality of input ends of the control chip are respectively and correspondingly connected with a field effect tube, a source electrode and a grid electrode of any one field effect tube are respectively and correspondingly connected with the corresponding input end and driving end of the control chip, and a drain electrode of the field effect tube is connected with the output end of the control chip;
the control chip U1 is connected with a protection unit, the protection unit comprises a voltage dividing resistor group which is respectively and correspondingly connected with a plurality of input ends of the control chip U1, any one of the voltage dividing resistor groups comprises a first resistor, one end of the first resistor is connected with the input end corresponding to the control chip U1, the other end of the first resistor is respectively connected with the detection end corresponding to the control chip U1 and one end of a second resistor, and the other end of the second resistor is connected with the ground.
2. The multi-input seamless switching controller according to claim 1, wherein the protection unit further comprises a fuse tube correspondingly connected to the plurality of input ends of the control chip U1, and one end of any one of the fuse tubes is simultaneously connected to the source electrode of the corresponding field effect tube.
3. The multi-input seamless switching controller according to claim 1, wherein the control chip U1 is connected with a state prompting unit, the state prompting unit includes a prompting group correspondingly connected with a plurality of prompting ends of the control chip U1, any one of the prompting groups includes a prompting resistor with one end connected with an output end of the control chip U1, the other end of the prompting resistor is simultaneously connected with the prompting end corresponding to the control chip U1 and an anode of a light emitting diode, and a cathode of the light emitting diode is connected with the ground.
4. A multiple-input seamless switching power supply system comprising a multiple-input seamless switching controller as claimed in claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321912801.6U CN220711165U (en) | 2023-07-20 | 2023-07-20 | Multi-input seamless switching controller and power supply system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321912801.6U CN220711165U (en) | 2023-07-20 | 2023-07-20 | Multi-input seamless switching controller and power supply system |
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| CN220711165U true CN220711165U (en) | 2024-04-02 |
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| CN202321912801.6U Active CN220711165U (en) | 2023-07-20 | 2023-07-20 | Multi-input seamless switching controller and power supply system |
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