CN205544570U - Power hot plug redundant circuit - Google Patents
Power hot plug redundant circuit Download PDFInfo
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- CN205544570U CN205544570U CN201620269197.3U CN201620269197U CN205544570U CN 205544570 U CN205544570 U CN 205544570U CN 201620269197 U CN201620269197 U CN 201620269197U CN 205544570 U CN205544570 U CN 205544570U
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Abstract
The application discloses a power hot plug redundant circuit, its pressure drop is very much little, and the voltage of mV level just can not cause the condition of under voltage to circuit at the back, and the consumption is very little when leading to overcurrent, gives out heat very for a short time, has saved area and fin, has reduced the consumption for whole module and power strip. It includes: first power supply unit, second supply unit, double - circuit hot plug controller, double - circuit ideal diode controller, first power supply unit includes first, the 2nd NMOS pipe, and the first leakage resistance of examining, second supply unit include third, fourth NMOS pipe, and the leakage resistance is examined to the second.
Description
Technical field
This utility model belongs to the skill of Power Management Design in technical process measurement and control system functional safety product
Art field, particularly relates to a kind of Power Supply Hot Swap redundant circuit, and it is mainly used in Power Supply Hot Swap circuit and sets
In meter.
Background technology
In numerous applications, in order to ensure not affecting into and out on other module of module, draw
Enter plug-and-play circuit.In order to ensure the board continuity work at scene, typically there is a few set power supply to existing
The board of field is powered, and conventional 5V power supply needs to be obtained by redundancy by two-way or three road 5V circuit.?
In conventional design, conventional power supply redundancy typically uses Schottky diode redundancy, and do so mainly has
Following shortcoming:
1, diode forward pressure drop is about 0.5V, is bigger for 5V system, if input is
Normal 5V, entering the actual voltage value in some chip is 5-0.5=4.5V, and some chip is likely to can not
Normal work.
2, if the current ratio passed through is bigger, according to P=UI, the power that diode itself consumes compares
Greatly, too much power consumption, the energy of waste country can be caused.
3, the power main transition that diode consumes becomes heat, and caloric value is bigger, more serious situation
Wanting radiation fin, area can strengthen, and can affect size and the thickness of pcb board.
Summary of the invention
The technical problems to be solved in the utility model is the defect overcoming prior art, it is provided that a kind of power supply heat
Plug redundant circuit, its pressure drop is the least, simply the voltage of mV level, circuit below will not be caused electricity
The situation that pressure is not enough, during logical super-high-current, power consumption is the least, and caloric value is the least, saves area and heat radiation
Sheet, reduces power consumption for whole module and power panel.
The technical scheme solving the problems referred to above is: this Power Supply Hot Swap redundant circuit, comprising: first
Power supply unit, the second power supply unit, two-way hot-swapping controller, two-way ideal diode controller；The
One power supply unit includes first, second NMOS tube, the first inspection leakage resistance, and the second power supply unit includes the
Three, the 4th NMOS tube, the second inspection leakage resistance；First via 5V input voltage sequentially passes through the first inspection stream electricity
Resistance, the drain electrode of the first NMOS tube, the source electrode of the first NMOS tube, the source electrode of the second NMOS tube, the 2nd NMOS
The drain electrode of pipe, the second road 5V input voltage sequentially pass through the second inspection leakage resistance, the drain electrode of the 3rd NMOS tube,
The source electrode of the 3rd NMOS tube, the source electrode of the 4th NMOS tube, the drain electrode of the 4th NMOS tube, first and second road 5V
Input voltage, the outfan of first and second inspection leakage resistance respectively enter two-way hot-swapping controller, two-way heat
The outfan of swap controller connects the grid of the first NMOS tube, the grid of the 3rd NMOS tube respectively, and first
The source electrode of NMOS tube, the source electrode of the 3rd NMOS tube connect the input of two-way ideal diode controller respectively
End, the outfan of two-way ideal diode controller connects the grid of the second NMOS tube, the 4th NMOS respectively
The grid of pipe.
This utility model uses the LTC4222 of Linear Tech to be two-way hot-swapping controller, has under-voltage, mistake
Press, cross flow monitoring, when input 5V voltage is not in normal range or overcurrent, can disconnect
NMOS tube, make 5V disconnect with circuit below, protection circuit below, two-way ideal diode controls
Device LTC4353 controls two NMOS tube, uses NMOS tube to replace Schottky diode, and therefore pressure drop is special
Little, the simply voltage of mV level, will not cause the situation of undertension, logical super-high-current to circuit below
Time power consumption the least, caloric value is the least, saves area and fin, for whole module and power panel
Reduce power consumption.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of Power Supply Hot Swap redundant circuit of the present utility model.
Fig. 2 is the schematic diagram of Power Supply Hot Swap redundant circuit of the present utility model.
Detailed description of the invention
As it is shown in figure 1, this Power Supply Hot Swap redundant circuit, comprising: the first power supply unit, second
Power supply unit, two-way hot-swapping controller, two-way ideal diode controller；First power supply unit includes
First, second NMOS tube, the first inspection leakage resistance, the second power supply unit includes the three, the 4th NMOS tube,
Second inspection leakage resistance；First via 5V input voltage sequentially passes through the first inspection leakage resistance, the leakage of the first NMOS tube
Pole, the source electrode of the first NMOS tube, the source electrode of the second NMOS tube, the drain electrode of the second NMOS tube, the second road 5V
Input voltage sequentially pass through the second inspection leakage resistance, the drain electrode of the 3rd NMOS tube, the source electrode of the 3rd NMOS tube,
The source electrode of the 4th NMOS tube, the drain electrode of the 4th NMOS tube, first and second road 5V input voltage, first and second
The outfan of inspection leakage resistance respectively enters two-way hot-swapping controller, the outfan of two-way hot-swapping controller
Connect the grid of the first NMOS tube, the grid of the 3rd NMOS tube respectively, the source electrode of the first NMOS tube, the 3rd
The source electrode of NMOS tube connects the input of two-way ideal diode controller, two-way ideal diode control respectively
The outfan of device processed connects the grid of the second NMOS tube, the grid of the 4th NMOS tube respectively.
This utility model uses the LTC4222 of Linear Tech to be two-way hot-swapping controller, has under-voltage, mistake
Press, cross flow monitoring, when input 5V voltage is not in normal range or overcurrent, can disconnect
NMOS tube, make 5V disconnect with circuit below, protection circuit below, two-way ideal diode controls
Device LTC4353 controls two NMOS tube, uses NMOS tube to replace Schottky diode, and therefore pressure drop is special
Little, the simply voltage of mV level, will not cause the situation of undertension, logical super-high-current to circuit below
Time power consumption the least, caloric value is the least, saves area and fin, for whole module and power panel
Reduce power consumption.
It addition, described two-way hot-swapping controller is LTC4222 two-way hot-swapping controller.
It addition, described two-way ideal diode controller is LTC4353, double low pressure redundant diodes control
Device.
It addition, described first, second, third, fourth NMOS tube is model is SI4126DY
NMOS tube.
This utility model is described more thoroughly below.
As in figure 2 it is shown, two-way hot-swapping controller LTC4222 (U4) has the function of hot plug protection,
Having input over-and under-voltage simultaneously and cross the protective measures such as stream, first via overvoltage detects by LTC4222
The voltage of the 32nd foot, magnitude of voltage is obtained by resistance R1, R2, R3 dividing potential drop, when the 32nd foot at LTC4222
When the voltage detected is more than 1.235V, it is taken as overvoltage condition, will be at the 28th foot of LTC4222
Producing a high level signal, turn off nmos switch SI4126DY (U1), the first via is under-voltage, and detection is to pass through
The voltage of the 31st foot, magnitude of voltage is obtained by resistance R1, R2, R3 dividing potential drop, when the 31st foot at LTC4222
When the voltage detected is less than 1.235V, it is taken as under-voltage condition, will be at the 28th foot of LTC4222
Producing a high level signal, turn off nmos switch SI4126DY (U1), first via over-current detection is to pass through
Voltage difference between 30th foot and the 29th foot of LTC4222, namely the voltage difference on resistance R4, works as electricity
When pressure reduction arrives 50mV, will be considered that it is over-current state, will be high in the 28th foot generation one of LTC4222
Level signal, will turn off nmos switch SI4126DY (U1).Ensure circuit safety power-off below.
Second passes by the voltage that pressure detection is the 9th foot by LTC4222, magnitude of voltage by resistance R11,
R12, R13 dividing potential drop obtains, and when the voltage detected at the 9th foot of LTC4222 is more than 1.235V, just recognizes
For being overvoltage condition, a high level signal will be produced at the 13rd foot of LTC4222, turn off NMOS and open
Closing SI4126DY (U6), the second under-voltage detection in road is the voltage by the 10th foot, and magnitude of voltage is by resistance
R11, R12, R13 dividing potential drop obtains, and the voltage detected when the 10th foot at LTC4222 is less than 1.235V
Time, it is taken as under-voltage condition, a high level signal will be produced at the 13rd foot of LTC4222, close
Disconnected nmos switch SI4126DY (U6), the second tunnel over-current detection is the 11st foot and the 12nd by LTC4222
Voltage difference between foot, the namely voltage difference on resistance R18, when voltage difference arrives 50mV, can recognize
For being over-current state, a high level signal will be produced at the 13rd foot of LTC4222, NMOS will be turned off
Switch SI4126DY (U6), it is ensured that circuit safety power-off below.
First via Voltage Feedback controls, and the 5V outfan through SI4126DY (U1) divides through resistance R7, R8
It is crimped onto the 26th foot of LTC4222, when the voltage of the 26th foot drops to below 1.235V, it is believed that 5V power supply
Abnormal.
Second road Voltage Feedback controls, through the 5V outfan of SI4126DY (U6) through resistance R14, R15
Dividing potential drop receives the 15th foot of LTC4222, when the voltage of the 15th foot drops to below 1.235V, it is believed that 5V electricity
Source is abnormal.
Two-way ideal diode controller LTC4353 (U4) is by controlling two NMOS tube
SI4126DY (U2, U5), completes the redundancy of power supply, and SI4126DY direct current conducting resistance only has a few milliohm,
The least in the pressure drop of ideal diode, can consider as ideal diode.
First via NMOS tube is by the 12nd foot control system of LTC4353, when the input voltage of the first via is faulty,
A low level can be produced at the 12nd foot of LTC4353, turn off NMOS tube SI4126DY (U2), it is ensured that below
Circuit safety power-off.
Second tunnel NMOS tube is by the 5th foot control system of LTC4353, when the input voltage on the second tunnel is faulty, meeting
The 5th foot at LTC4353 produces a low level, turns off NMOS tube SI4126DY (U5), it is ensured that electricity below
The safe power-off in road.
The above, be only preferred embodiment of the present utility model, and this utility model is not made any shape
Restriction in formula.It will be apparent to an ordinarily skilled person in the art that every according to technology of the present utility model
Any simple modification, equivalent variations and the modification that above example is made by essence, the most still belongs to this practicality new
The protection domain of type technical scheme.
Claims (4)
1. a Power Supply Hot Swap redundant circuit, it is characterised in that: comprising: the first power supply unit,
Second power supply unit, two-way hot-swapping controller, two-way ideal diode controller；First
Power supply unit includes first, second NMOS tube, the first inspection leakage resistance, the second power supply unit bag
Include the three, the 4th NMOS tube, the second inspection leakage resistance；First via 5V input voltage sequentially passes through
First inspection leakage resistance, the drain electrode of the first NMOS tube, the source electrode of the first NMOS tube, the 2nd NMOS
The source electrode of pipe, the drain electrode of the second NMOS tube, the second road 5V input voltage sequentially passes through the second inspection
Leakage resistance, the drain electrode of the 3rd NMOS tube, the source electrode of the 3rd NMOS tube, the source of the 4th NMOS tube
Pole, the drain electrode of the 4th NMOS tube, first and second road 5V input voltage, first and second inspection stream electricity
The outfan of resistance respectively enters two-way hot-swapping controller, the output of two-way hot-swapping controller
End connects the grid of the first NMOS tube, the grid of the 3rd NMOS tube respectively, the first NMOS tube
Source electrode, the source electrode of the 3rd NMOS tube connect the input of two-way ideal diode controller respectively
End, the outfan of two-way ideal diode controller connect respectively the grid of the second NMOS tube,
The grid of the 4th NMOS tube.
Power Supply Hot Swap redundant circuit the most according to claim 1, it is characterised in that: described double
Road hot-swapping controller is LTC4222 two-way hot-swapping controller.
Power Supply Hot Swap redundant circuit the most according to claim 2, it is characterised in that: described double
Road ideal diode controller is the double low pressure redundant diode controller of LTC4353.
Power Supply Hot Swap redundant circuit the most according to claim 3, it is characterised in that: described
One, second, third, the 4th NMOS tube be model be the NMOS tube of SI4126DY.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620269197.3U CN205544570U (en) | 2016-04-01 | 2016-04-01 | Power hot plug redundant circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620269197.3U CN205544570U (en) | 2016-04-01 | 2016-04-01 | Power hot plug redundant circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544570U true CN205544570U (en) | 2016-08-31 |
Family
ID=57142147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620269197.3U Active CN205544570U (en) | 2016-04-01 | 2016-04-01 | Power hot plug redundant circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544570U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350288A (en) * | 2019-08-09 | 2021-02-09 | 亚德诺半导体国际无限责任公司 | Communication terminal for hot-plug controller |
| CN116599204A (en) * | 2023-07-12 | 2023-08-15 | 新誉轨道交通科技有限公司 | Power supply device |
| US11768534B2 (en) | 2021-02-26 | 2023-09-26 | Ovh | Method and power distribution circuit for providing electric power from a plurality of power supplies to a plurality of loads |
-
2016
- 2016-04-01 CN CN201620269197.3U patent/CN205544570U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350288A (en) * | 2019-08-09 | 2021-02-09 | 亚德诺半导体国际无限责任公司 | Communication terminal for hot-plug controller |
| CN112350288B (en) * | 2019-08-09 | 2024-03-12 | 亚德诺半导体国际无限责任公司 | Communication terminal for hot plug controller |
| US11768534B2 (en) | 2021-02-26 | 2023-09-26 | Ovh | Method and power distribution circuit for providing electric power from a plurality of power supplies to a plurality of loads |
| CN116599204A (en) * | 2023-07-12 | 2023-08-15 | 新誉轨道交通科技有限公司 | Power supply device |
| CN116599204B (en) * | 2023-07-12 | 2023-09-29 | 新誉轨道交通科技有限公司 | power supply device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 644000 Building 9, Jinrun Industrial Park, Xuzhou District, Yibin City, Sichuan Province Patentee after: Sichuan Security Control Technology Co.,Ltd. Address before: 100095 building 6, yard 9, Dijin Road, Haidian District, Beijing Patentee before: BEIJING ECHO TECHNOLOGIES Co.,Ltd. |
|
| CP03 | Change of name, title or address |