CN206164356U - Fall electric clamper management circuit - Google Patents
Fall electric clamper management circuit Download PDFInfo
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- CN206164356U CN206164356U CN201621199224.0U CN201621199224U CN206164356U CN 206164356 U CN206164356 U CN 206164356U CN 201621199224 U CN201621199224 U CN 201621199224U CN 206164356 U CN206164356 U CN 206164356U
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Abstract
The embodiment of the utility model discloses fall electric clamper management circuit for too big and the problem that causes circuit damage or burn out of electrical potential difference when solving two power supply lost. The embodiment of the utility model provides an include: triode, stabiliser, resistance R1, resistance R2 and resistance R3. The embodiment of the utility model provides a switching characteristic of make full use of triode and the stabilized voltage characteristic of adjustable accurate shunt voltage regulator have realized the management of the electric voltage clamp of falling of high end system. The embodiment of the utility model provides a charge through the triode, make the electrical potential difference of two powers be close to gradually to avoid the too big and trouble that causes the circuit damage or burn out of two power electrical potential differences. The embodiment of the utility model provides a circuit component is few, and the fault rate is low, and the cost is very low, and the circuit is simple, and the reliability is high, and the practicality is very strong, but wide application in systems such as treater, controller, FPGA, DSP to safe and reliable, the function of power when the electricity falls in the system that has realized management.
Description
Technical field
This utility model is related to field of power management, more particularly to power down clamper management circuit.
Background technology
In one electronic system circuitry of R ＆ D design, it is also system peace that reliable power-supply system is the basis of whole system
The guarantee of complete reliable operation.Current most of electronic products is required for using multiple supply voltage.Supply voltage number
Increase brings a design challenges, that is, need to be controlled the electric and power-off characteristic that goes up relatively of power supply, to eliminate digital system
Unite and suffer damage or occur the probability of locking.Microprocessor, FPGA and ASIC usually require that kernel during upper electricity and power-off
When having certain specific relation, i.e. power down between I/O voltages, one power supply can not be higher by certain electricity than another power supply
Pressure, otherwise system is abnormal by power down, causes system injury or damage.And this relation is to be difficult control in practical operation
, especially when the number of power supply is more.
Accordingly, it would be desirable to design circuit fix the difference of two supply voltages within the specific limits, circuit is just can guarantee that
Stability.Have plenty of in existing technical scheme and connect two power supplys using clamp diode or transistor, have plenty of utilization
Power management integrated chip strictly controls power supply power-fail, by the power down process of integrated chip mandatory provision power supply.
Catastrophic consequence can be produced in high-current circuit using the scheme of diode, in power supply power-fail, if power supply
Between electric potential difference exceed certain value, clamp diode or transistor will be turned on immediately, cause two power supply moments to be connected, from
And burn circuit or damage element.And utilize the method for integrated chip complicated, it is difficult to realize and high cost, be not suitable for extensive
It is used in cheap circuit.Therefore, improve the technical scheme of diode, prevent power supply moment from connecting, realize simple and real
Voltage management is the present invention staff's problem to be solved.
Utility model content
This utility model embodiment discloses a kind of power down clamper management circuit.This power down clamper management circuit passes through three
Pole pipe discharge and recharge, moves closer to the electric potential difference of two power supplys, so as to avoid that two electrical source voltages difference is excessive and the electricity that causes
Path loss is hindered or is burnt.
This utility model embodiment provides a kind of power down clamper and manages circuit, including：Current mode charge switch, control mould
Block；
The current mode charge switch includes three connection ends, and the first connection end is connected with the first power supply, the second connection end
It is connected with second source, the 3rd connection end is connected with the control module.
Preferably, the current mode charge switch is specially audion；
The emitter stage of the audion connects first power supply, and the colelctor electrode connection of the audion is described second electric
Source, the base stage of the audion connect the control module.
Preferably, the control module includes resistance R1, stable-pressure device；
One end of the resistance R1 connects the emitter stage of the audion, and the other end of the resistance R1 connects the voltage stabilizing
One end of device and the base stage of the audion；
The other end of the stable-pressure device connects the colelctor electrode of the audion.
Preferably, the stable-pressure device is specially adjustable voltage stabilizer.
Preferably, the stable-pressure device is specially manostat；
The negative pole of the manostat connects the base stage of the audion, and the positive pole of the manostat connects the audion
Colelctor electrode.
A kind of power down clamper management circuit that this utility model is provided also includes resistance R2, resistance R3；
One end of the resistance R2 connects the emitter stage of the audion, and the other end of the resistance R2 connects the voltage stabilizing
The reference edge of device；
One end of the resistance R3 connects the reference edge of the manostat, and the other end of the resistance R3 connects three pole
The colelctor electrode of pipe.
Preferably, the current mode switch in a kind of power down clamper management circuit that this utility model is provided can also be MOS
Pipe；
The drain electrode of the metal-oxide-semiconductor connects first power supply, and the source electrode of the metal-oxide-semiconductor connects the second source, described
The grid of metal-oxide-semiconductor connects the control module.
As can be seen from the above technical solutions, this utility model embodiment has advantages below：
This utility model embodiment moves closer to the electric potential difference of two power supplys, so as to avoid by audion discharge and recharge
The failure that two electrical source voltage differences are excessive and cause circuit to damage or burn.This utility model embodiment circuit components are few, therefore
Barrier rate is low；And cost is very low, circuit is simple, and reliability is high, and practicality is very strong；Can be widely applied to processor, control
The system such as device, FPGA, DSP, and safe and reliable, the function of power management when realizing system power failure.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or accompanying drawing to be used is briefly described needed for description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 manages the circuit diagram of circuit for the power down clamper that this utility model is provided；
Fig. 2 manages the circuit diagram of circuit concrete application example for another kind of power down clamper that this utility model is provided；
Another kind of power down clamper management electricity of the circuit concrete application example in system power failure that Fig. 3 is provided for this utility model
Source voltage curve.
Specific embodiment
This utility model embodiment discloses a kind of power down clamper management circuit, is charged by audion, makes two power supplys
Electric potential difference move closer to, the failure for causing circuit to damage or burn so as to avoid two electrical source voltages difference excessive.
Fig. 1 is referred to, this utility model embodiment provides a kind of power down clamper and manages circuit, including：Current mode charges
Switch, control module；
Current mode charge switch includes three connection ends, and the first connection end is connected with the first power supply, the second connection end and the
Two power supplys connect, and the 3rd connection end is connected with control module.
Current mode charge switch is specially audion；
The emitter stage of audion connects the first power supply, and the colelctor electrode connection second source of audion, the base stage of audion connect
Connect control module.
Control module for audion provide control voltage, for controlling the switch of audion so that the first power supply and
Second source carries out discharge and recharge according to the switch of audion.
Control module includes resistance R1, stable-pressure device；
The emitter stage of one end connecting triode of resistance R1, one end and three poles of the other end connection stable-pressure device of resistance R1
The base stage of pipe；
The colelctor electrode of the other end connecting triode of stable-pressure device.
Stable-pressure device for audion provide control voltage, for controlling the switch of audion so that the first power supply and
Second source carries out discharge and recharge according to the switch of audion.
Stable-pressure device is specially adjustable voltage stabilizer.
Stable-pressure device is specially manostat；
The base stage of the negative pole connecting triode of manostat, the colelctor electrode of the positive pole connecting triode of manostat.
A kind of power down clamper management circuit that this utility model is provided also includes resistance R2, resistance R3；
The emitter stage of one end connecting triode of resistance R2, the other end of resistance R2 connect the reference edge of manostat；
One end of resistance R3 connects the reference edge of manostat, the colelctor electrode of the other end connecting triode of resistance R3.
Resistance R2 and resistance R3 is for being adjusted to the working condition of manostat so that manostat according to the first power supply,
Second source and the work of default resistance parameter, the power down clamper between power supply within limits.
Detailed introduction is made to circuit of the present utility model above, below will apply to different occasions to this utility model
Circuit parameter be described in detail, another kind of power down clamper that this utility model embodiment is provided manages circuit to be included：Three
Pole pipe, control module；
The emitter stage of audion connects the first power supply, and the colelctor electrode connection second source of audion, the base stage of audion connect
Connect control module.
Control module for audion provide control voltage, for controlling the switch of audion so that the first power supply and
Second source carries out discharge and recharge according to the switch of audion.
Control module includes resistance R1, stable-pressure device；
The emitter stage of one end connecting triode of resistance R1, one end and three poles of the other end connection stable-pressure device of resistance R1
The base stage of pipe；
The colelctor electrode of the other end connecting triode of stable-pressure device.
Stable-pressure device for audion provide control voltage, for controlling the switch of audion so that the first power supply and
Second source carries out discharge and recharge according to the switch of audion.
Stable-pressure device is specially manostat；
The base stage of the negative pole connecting triode of manostat, the colelctor electrode of the positive pole connecting triode of manostat.
A kind of this power down clamper management circuit also includes resistance R2, resistance R3；
The emitter stage of one end connecting triode of resistance R2, the other end of resistance R2 connect the reference edge of manostat；
One end of resistance R3 connects the reference edge of manostat, the colelctor electrode of the other end connecting triode of resistance R3.
It should be noted that this utility model not only can apply to the processes such as the power down control of system, can also use
In the clamper of voltage.Make sufficiently to explain below in conjunction with applications of the Fig. 2 and Fig. 3 to this utility model in power down control.
When this utility model applies in power down control management, this utility model makes full use of the switch of audion
The stabilizing voltage characteristic of characteristic and adjustable precision shunt regulator, realizes the power down management of some high-end systems.Wherein the first power supply
VDD1 and second source VDD2 for processor each functional module power supply audion Q1 as charge switch and manostat U1,
Resistance R1, resistance R2, resistance R3 collectively constitute power down power control circuit.
Such as, for senior system, power management is quite important, for the power down of system has strict demand, wrong
Power down order by mistake may break treat with device or whole system.For example, the first power supply of certain processor be 3.3V power supplys, second
Power supply is 1.8V power supplys, and its requirement is：
1st, 1.8V power supplys first go up electricity, then 3.3V power supply electrifyings.
2nd, 3.3V power supplys elder generation power down, then 1.8V power supply power-fails.
3rd, during power down, the difference of 3.3V and 1.8V power rails must not exceed 2V.
Be more than this utility model be applied to power supply power-fail management some introduction, this utility model will be applied to below
The physical circuit parameter of power supply power-fail management makees further details of explanation, refers to Fig. 2, and wherein the one of this utility model circuit
Individual embodiment is the control circuit of 3.3V and 1.8V power rail electric potential differences.The circuit is capable of the power down of effective control process device
Journey, makes the reliable power down of processor security.
This is included using a kind of power down clamper management circuit of new offer：Audion, control module；
The emitter stage of audion connects the first power supply, and the colelctor electrode connection second source of audion, the base stage of audion connect
Connect control module.
Control module for audion provide control voltage, for controlling the switch of audion so that the first power supply and
Second source carries out discharge and recharge according to the switch of audion.
Control module includes resistance R1, stable-pressure device；
The emitter stage of one end connecting triode of resistance R1, one end and three poles of the other end connection stable-pressure device of resistance R1
The base stage of pipe；
The colelctor electrode of the other end connecting triode of stable-pressure device.
Stable-pressure device for audion provide control voltage, for controlling the switch of audion so that the first power supply and
Second source carries out discharge and recharge according to the switch of audion.
Stable-pressure device is specially manostat；
The base stage of the negative pole connecting triode of manostat, the colelctor electrode of the positive pole connecting triode of manostat.
A kind of this power down clamper management circuit also includes resistance R2, resistance R3；
The emitter stage of one end connecting triode of resistance R2, the other end of resistance R2 connect the reference edge of manostat；
One end of resistance R3 connects the reference edge of manostat, the colelctor electrode of the other end connecting triode of resistance R3.
Resistance R2 and resistance R3 is for being adjusted to the working condition of manostat so that manostat according to the first power supply,
Second source and the work of default resistance parameter, the power down clamper between power supply within limits.
It should be noted that the first power supply in this utility model embodiment is 3.3V power supplys, second source is that 1.8V is electric
Source, its requirement is：
1st, 1.8V power supplys first go up electricity, then 3.3V power supply electrifyings.
2nd, 3.3V power supplys elder generation power down, then 1.8V power supply power-fails.
3rd, during power down, the difference of 3.3V and 1.8V power rails must not exceed 2V.
It should be noted that in the present embodiment, the first power supply is 3.3V power supplys, and second source is 1.8V power supplys.In this reality
Apply in example, the concrete model of audion is SS8550, is current mode switch, and cut-in voltage is 0.5V；
The concrete model of manostat is ZTLV431, is that the low pressure adjustable accurate of TI (Texas Instruments) is in parallel
Manostat, reference edge output voltage are 1.24V；
Resistance R1 is 510 ohm, and resistance R2 is 10K ohms, and resistance R3 is 20K ohms.
The resistance ratios of resistance R2 and resistance R3 are 1 to 2.
It is more than the detailed description of the physical circuit parameter to one of embodiment of the present utility model, below will be to this
The function mode of individual embodiment is described in detail, and the operating mode of this utility model embodiment is described as follows：
The working condition of a, manostat：
Low pressure adjustable accurate shunt regulator of the manostat for TI (Texas Instruments), the reference of ZTLV431
End output voltage is 1.24V.The working condition of ZTLV431 manostat is herein：If VDD1<(VDD2+1.24V), then manostat
Do not work；If 1.24V<(VDD1–VDD2)<1.24V* (1+R2/R3)=1.86V, then Vk=VDD1；If (VDD1-VDD2)>
1.24V* (1+R2/R3)=1.86V, then Vk=VDD2+1.24V.
It should be noted that in the present embodiment, the first power vd D1 is 3.3V power supplys, and second source VDD2 is that 1.8V is electric
Source.
B, it is upper electric when：
Due to it is upper electric when 1.8V power supplys first go up electricity, therefore upper electric step is as follows：
1st, after the upper electricity of 1.8V, 3.3V does not also go up electricity, therefore, audion and manostat do not work.
2nd, after 3.3V is started power up and reached 3.04V, manostat is started working, and makes manostat K pole tension Vk=VDD1, and
Last till that 3.3V power supplys are fully powered up.Now the emitter stage of audion is almost 0 with colelctor electrode electric potential difference, and audion is in all the time
Cut-off state.
When c, steady operation：
System stability work when, i.e., with it is upper electric when 3.3V power supply electrifyings after working condition, manostat K pole tensions be Vk=
VDD1.Audion ends.
When d, system power failure：
The cut-in voltage of audion is 0.5V.Work as VDD2<When (VDD1-1.86V), manostat K pole tensions are VDD2+
1.24V, transistor emitter reach 0.62V, triode ON, in magnifying state with colelctor electrode electric potential difference.3.3V power supplys lead to
Cross audion Q1 to charge to 1.8V, until both power supply differences are 1.86V.Ensure that with this 3.3V is differed in 2V with 1.8V power supplys
Within.The safe power down of guarantee system.
If Fig. 3 is under the first power supply (i.e. 3.3V power supplys) and second source (i.e. 1.8V power supplys) voltage during system power failure
Electric potential difference curve between drop trendgram and two power supplys.Front two curves are VDD2 (being VDD_1.8V shown in figure) and VDD1 (figures
Shown in be VDD_3.3V) power supply declines figure, Article 3 curve is that electric potential difference (VDD_3.3V-VDD_1.8V) between two power supplys is bent
Line.During power down, system be VDD1 elder generation power down, power down after VDD2.But 3.3V power down is slower, 1.8V power down speed
Hurry up.In the rapid power down of 1.8V and after 1.86V less than VDD1, the circuit is started working, it is ensured that (VDD1-VDD2)<2V.
E, circuit basic function：
The circuit constitutes the power down management circuit of high-end processors using 5 electronic devices and components.Will in processor power down
3.3V power supplys are with 1.8V power-supply system clampers within 2V.Make processor security power down.
The circuit can effectively manage the power down process of power supply suitable for the processor required to power supply power-fail.Ensure
The safe and reliable power down of system.
It should be noted that when two power rail normal operating potentials difference is with power down, this utility model requires that electric potential difference is differed
During more than 0.5V, the ZTLV431 in this circuit can be replaced using Zener diode, and suitably increase resistance R1, remove resistance
R2、R3.But now need to find suitable Zener diode.
This circuit when two power rails require that power down electric potential difference is very big can consider audion to be replaced with metal-oxide-semiconductor；
Metal-oxide-semiconductor is voltage-type switch, and audion is current mode switch, can be used in this circuit；ZTLV431 can also be changed into ginsengs
Examine the bigger manostat of voltage.
Resistance R1 suitably should be increased, while should find suitable Zener diode being controlled to circuit.
It should be noted that this utility model embodiment is suitable for wanting when two power rail normal operating potentials difference is with power down
When asking electric potential difference to differ by more than 0.5V.
Current mode switch in a kind of power down clamper management circuit that this utility model is provided can also be metal-oxide-semiconductor；
The drain electrode of metal-oxide-semiconductor connects the first power supply, the source electrode connection second source of metal-oxide-semiconductor, the grid connection control mould of metal-oxide-semiconductor
Block.
Hereinafter advantage of the present utility model will be described further, this utility model has advantages below：
This utility model accurately can be controlled the electric potential difference between two power rails within 2V in system power failure；
When being not moment when two power rail electric potential differences are to certain limit, two power rails are connected to allow two power supplys
Rail recovers to clamper, but is gradually turned on charging audion when certain limit is reached, and two power rails is gradually leaned on
Closely.This avoid two power rails directly to turn on and circuit dash-board injury or the consequence burnt occur；
The invention circuit is simple and reliable, has only just reached purpose with 5 electronic devices and components, has been made while cost-effective again
The system is more reliable and more stable.
This utility model has further the advantage that：
Circuit components are few, and fault rate is low；And cost is very low；
Circuit is simple, and reliability is high, and practicality is very strong；
This circuit is using can be widely used in the systems such as processor, controller, FPGA, DSP；
This circuit is safe and reliable during realization, it is to avoid the failure of power rail short circuit.
Above a kind of power down clamper management circuit provided by the utility model is described in detail, for this area
Those skilled in the art, according to this utility model embodiment thought, have in specific embodiments and applications and change
Become part, in sum, this specification content is should not be construed as to restriction of the present utility model.
Claims (7)
1. power down clamper manages circuit, it is characterised in that include：Current mode charge switch, control module；
The current mode charge switch includes three connection ends, and the first connection end is connected with the first power supply, the second connection end and the
Two power supplys connect, and the 3rd connection end is connected with the control module.
2. power down clamper according to claim 1 manages circuit, it is characterised in that the current mode charge switch is specially
Audion；
The emitter stage of the audion connects first power supply, and the colelctor electrode of the audion connects the second source, institute
The base stage for stating audion connects the control module.
3. power down clamper according to claim 2 manages circuit, it is characterised in that the control module include resistance R1,
Stable-pressure device；
One end of the resistance R1 connects the emitter stage of the audion, and the other end of the resistance R1 connects the stable-pressure device
One end and the audion base stage；
The other end of the stable-pressure device connects the colelctor electrode of the audion.
4. power down clamper according to claim 3 manages circuit, it is characterised in that the stable-pressure device is specially adjustable steady
Depressor.
5. power down clamper according to claim 3 manages circuit, it is characterised in that the stable-pressure device is specially voltage stabilizing
Device；
The negative pole of the manostat connects the base stage of the audion, and the positive pole of the manostat connects the current collection of the audion
Pole.
6. power down clamper according to claim 5 manages circuit, it is characterised in that also including resistance R2, resistance R3；
One end of the resistance R2 connects the emitter stage of the audion, and the other end of the resistance R2 connects the manostat
Reference edge；
One end of the resistance R3 connects the reference edge of the manostat, and the other end of the resistance R3 connects the audion
Colelctor electrode.
7. power down clamper according to claim 1 manages circuit, it is characterised in that the current mode switch is metal-oxide-semiconductor；
The drain electrode of the metal-oxide-semiconductor connects first power supply, and the source electrode of the metal-oxide-semiconductor connects the second source, the metal-oxide-semiconductor
Grid connect the control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199224.0U CN206164356U (en) | 2016-11-07 | 2016-11-07 | Fall electric clamper management circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621199224.0U CN206164356U (en) | 2016-11-07 | 2016-11-07 | Fall electric clamper management circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206164356U true CN206164356U (en) | 2017-05-10 |
Family
ID=58657592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621199224.0U Active CN206164356U (en) | 2016-11-07 | 2016-11-07 | Fall electric clamper management circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206164356U (en) |
-
2016
- 2016-11-07 CN CN201621199224.0U patent/CN206164356U/en active Active
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Address after: Room 517, 1023 Gaopu Road, Tianhe Software Park, Tianhe District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. Address before: 510000 Room 204, 2nd Floor, 1035 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. |
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Address after: 510000 room 306, 3rd floor, 43 Sicheng Road, software park, Tianhe District, Guangzhou City, Guangdong Province Patentee after: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. Address before: Room 517, 1023 Gaopu Road, Tianhe Software Park, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGZHOU ZHIYUAN ELECTRONICS Co.,Ltd. |