CN2602410Y - Microprocessor power supply controller for the constant-current supply system - Google Patents
Microprocessor power supply controller for the constant-current supply system Download PDFInfo
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- CN2602410Y CN2602410Y CN 03237180 CN03237180U CN2602410Y CN 2602410 Y CN2602410 Y CN 2602410Y CN 03237180 CN03237180 CN 03237180 CN 03237180 U CN03237180 U CN 03237180U CN 2602410 Y CN2602410 Y CN 2602410Y
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Abstract
The utility model discloses an electricity supplying controller for the micro-processor of the permanent current power supply system, pertaining to the controlling technology field and used for solving the problems that under the circumstance of electrifying or power-fail, the current power supply device causes the data of the micro-processor be lost because of abnormal voltage. The technical proposal is that the utility model comprises two buses, a permanent current or limit current parts, an energy storing element, as well as a control circuit consisting of an imitation switch circuit, a voltage control circuit, a controlling circuit; wherein, the voltage control circuit is a manostat, the imitation switch self-maintain circuit consists of a manostat and a capacity parallel connected, the bus is serially connected with the permanent current element as an output, the energy storing element are connected between the outputs, the manostat Z1 and Z2 controls the through and the break of the imitation switch, and the output of which supplies power for the micro-processor. The utility model can provide a rapid increasing rate of the voltage and a large instant current to meet the need of the normal replacement of the micro-processor. When the power is failed to supply, the power can be rapidly broken to prevent the data from losing.
Description
Technical field
The utility model relates to a kind of control device of giving microprocessor power supply in constant current or current limliting supply line, belongs to the electron controls technology field.
Background technology
Current, low-power consumption microprocessor (MCU) has obtained using widely in measurement and warning circuit, wherein adopts the bus working method mostly, and modal is the double bus mode.In order on these two buses, to articulate more monitoring component, the farther distance of transmission, not only require measurement and warning piece power consumption little, and wish that the electric current on the bus changes little in message transmitting procedure, so these parts in the double bus working line mostly adopt the method power supply of constant current or current limliting.Because the needs of Based Intelligent Control, these parts all are embedded with microprocessor (MCU) basically, the current drain of microprocessor is tens microamperes to more than 100 microamperes under steady state (SS), and usually will make energy-storage travelling wave tube with an electric capacity, to stabilize the variation of electric current peak valley.A typical monitoring system is by two buses; be articulated in the detection part and corresponding constant current (or current limliting) device of the numerous band Based Intelligent Control on the bus; energy-storage travelling wave tube constitutes; in actual motion, find; such system is less and bigger storage capacitor arranged because of its line design electric current; this makes its voltage climbing speed very slow; and be difficult to provide bigger electric current; this just usually can make microprocessor be in abnormal duty for some time before obtaining normal voltage and electric current; i.e. critical conditions between normal power supply and improper power supply, thus cause microprocessor normally not reset and memory data chaotic or lose.Based on same reason, when microprocessor cuts off the power supply,, thereby also can produce the defective that can not disconnect rapidly because the storage capacitor energy stored needs slow release, its result equally also can produce the fault of loss of data.
Summary of the invention
Problem to be solved in the utility model be manage to solve above-mentioned electric supply installation the problem that makes microprocessor data lose under the power or power-down situation, because of supply voltage is undesired, with provide a kind of under constant current or current limliting condition, can work as open promptly logical, when closing promptly disconnected microprocessor power supply controller.
The scheme that solves the problems of the technologies described above is such:
A kind of microprocessor power supply controller of constant-current supply system, remove and be provided with two buses, outside microprocessor that articulates and corresponding constant current or current limiting device and the energy-storage travelling wave tube, it also is provided with by analog switching circuit, the control circuit that voltage-controlled circuit and analog switch self-hold circuit are formed, wherein, voltage-controlled circuit is voltage-stabilizing device Z1, the analog switch self-hold circuit is composed in parallel by voltage-stabilizing device Z2 and capacitor C 2, behind serial connection constant current of described bus or the current limiting device as output terminal, the energy-storage travelling wave tube cross-over connection is between output terminal, output+end is connected with the input end of analog switching circuit, the output terminal of analog switching circuit is connected with the vdd terminal of microprocessor, the negative electrode of voltage-stabilizing device Z1 is connected to the input end of analog switching circuit, the control end of another termination analog switch, the anode of voltage-stabilizing device Z2 connects the output terminal of analog switching circuit, the control end of another termination analog switch, bus B-the connect ground end of each circuit.
The microprocessor power supply controller of above-mentioned constant-current supply system, described analog switching circuit is by triode T1, T2, resistance R 1, R2, R3, R4, R5 forms, the emitter of described triode T1 connects output+end, current collection is the output terminal of analog switch very, base stage connects the collector of triode T2, the emitter of triode T2 connect bus B-, resistance R 1 is connected between the base stage and emitter of triode T1, resistance R 2 is serially connected with between the collector of the base stage of triode T1 and T2, resistance R 3, the base stage of R4 one termination triode T2, the other end connects the negative electrode of voltage-stabilizing device Z1 and voltage-stabilizing device Z2 respectively, and resistance R 5 is connected between the base stage and emitter of triode T2.
The microprocessor power supply controller of above-mentioned constant-current supply system, triode T1, the T2 in the described analog switching circuit can be replaced by field effect transistor T1, T2 respectively.
The microprocessor power supply controller of above-mentioned constant-current supply system, the triode T1 in the described analog switching circuit can be replaced by field effect transistor T1.
The microprocessor power supply controller of above-mentioned constant-current supply system, described voltage-stabilizing device Z1, Z2 are stabilivolt, Voltage stabilizing module, light emitting diode or general-purpose diode.
The microprocessor power supply controller of above-mentioned constant-current supply system, described energy-storage travelling wave tube is a storage capacitor, shunt regulator tube Z3 on storage capacitor.
The microprocessor power supply controller of above-mentioned constant-current supply system, the voltage stabilizing value of described voltage-stabilizing device Z1, Z2 and stabilivolt Z3 satisfies following relation: U
Z3＞U
Z1＞U
Z2
The microprocessor power supply controller of above-mentioned constant-current supply system is connected to a mu balanced circuit between the output terminal of described analog switching circuit and the VDD of microprocessor, the VSS end.
Microprocessor power supply controller according to the utility model making, can keep under the condition of constant current or current limliting at circuit, providing faster, voltage climbing speed and transient high-current make the positive often-have-electricity of microprocessor (MCU), and when needs are stopped power supply, when supply voltage is reduced to when being lower than regulation numerical value, power supply is cut off rapidly, thereby guarantee no matter power or power-down of microprocessor (MCU), all can not be in critical conditions and produce and to reset or the fault of data corruption.The utility model is simple in structure, and reliable in action is promptly logical when opening, promptly disconnected when closing, and can be used in the monitoring or warning system of low-voltage, little electric current.
Description of drawings
Fig. 1 is an electric theory diagram of the present utility model;
Fig. 2 is an electrical schematic diagram;
Fig. 3 is the circuit diagram of first kind of analog switching circuit;
Fig. 4 is the circuit diagram of second kind of analog switching circuit;
Fig. 5 is the circuit diagram of the third analog switching circuit.
Embodiment
As can be seen, be provided with constant current source 1 in the circuit of giving microprocessor (can select PIC167XX for use) power supply from Fig. 1, Fig. 2, it provides the steady current of low current (for example 300 microamperes) to circuit.Constant current source 1 connects energy-storage travelling wave tube 2, is charged to energy-storage travelling wave tube 2 by it.Energy-storage travelling wave tube 2 is made up of storage capacitor C1 and stabilivolt Z3 in parallel, and the effect of storage capacitor C1 is the fluctuation of stabilizing electric current, and stabilivolt Z3 is in order to limit the voltage on the storage capacitor C1, certainly also shouldn't and only use storage capacitor C1.In order to reach the purpose of rapid break-make, the utility model is provided with the control circuit of being made up of analog switching circuit 3, voltage-controlled circuit 4 and analog switch self-hold circuit 5.
Fig. 4, Fig. 5 are the circuit diagrams of other two kinds of analog switching circuits 3, its basic connected mode is identical with the connected mode of analog switching circuit 3 shown in Figure 3, just in Fig. 4, replaced triode T1, the T2 among Fig. 3, in Fig. 5, replaced the triode T1 among Fig. 3 with field effect transistor T1 with field effect transistor T1, T2.Field effect transistor can be selected JFET for use, also can select MOSFET for use, and field effect transistor T1 is that P raceway groove, T2 are the N raceway groove.
The also available compound transistor of triode T1 replaces.
Voltage-controlled circuit that Fig. 2 shows 4 is made up of voltage-stabilizing device, and voltage-stabilizing device can be selected Voltage stabilizing module, stabilivolt, light emitting diode or general-purpose diode or the like for use, and present embodiment is selected stabilivolt Z1 for use.Its effect is voltage stabilizing, and a suitable bias voltage is provided for the base stage of triode T2, makes it could conducting when reaching certain value.
The analog switch self-hold circuit 5 that Fig. 2 shows is composed in parallel by voltage-stabilizing device Z2 and capacitor C 2, and voltage-stabilizing device also can be selected Voltage stabilizing module, stabilivolt, light emitting diode or general-purpose diode for use, and present embodiment is selected light emitting diode for use.The effect of voltage-stabilizing device Z2 also is that the base stage to triode T2 provides a bias voltage, but this voltage will be lower than the voltage that stabilivolt Z1 provides.The effect of capacitor C 2 is the speed that improves switch.
Between microprocessor 7 and analog switching circuit 3, also can add a mu balanced circuit 6, with further stabilizing circuit voltage.Mu balanced circuit 6 can be selected three terminal regulator for use, as HT7136 etc.
In foregoing circuit, select the voltage stabilizing value of voltage-stabilizing device Z3, Z1, Z2 should follow following principle: U
Z3＞U
Z1＞U
Z2
The course of work of the present utility model is such: bus B+, B-gives storage capacitor C1 charging through constant current or current limiting device 1.When the voltage U C1 on the storage capacitor C1 surpasses voltage U Z2 certain numerical value on the voltage stabilizing element Z2, T2 conducting, T1 conducting thereupon, analog switching circuit 3 conductings.This conduction value depends on the numerical value of resistance R 3, R5 and the cut-in voltage of T2.The effect of stabilivolt Z2 is to provide a self-sustaining path, and when the output voltage values of analog switch is lower than the correlation of Z2, closes self-hold circuit, thereby has also just closed analog switch.Capacitor C 2 is quickened the unlatching of analog switch 3, thereby the output voltage U O1 of analog switch 3 has rising edge faster, gives the microprocessor normal power supply rapidly.After the bus outage, voltage U C1 on the storage capacitor C1 slowly descends, during voltage U Z1 on being lower than voltage stabilizing element Z1, Z1 ends, can not bias voltage be provided for again triode T2, have only the voltage U Z2 on the light emitting diode Z2 can provide base bias voltage to T2, make it still keep conducting state by resistance R 4, R5 dividing potential drop.When UC1 continuation decline, when the bias voltage that dropping to UZ2 provides was lower than the cut-in voltage of triode T2, T2 ended, and caused T1 to end, and analog switch 3 disconnects.Capacitor C 2 works to quicken this process in this process.The foundation of selecting this magnitude of voltage is the minimum pressure drop that the normal working voltage of microprocessor adds linear voltage regulator.This process will make microprocessor cut off the power supply rapidly, advance people's reset mode and hightail unstable region.
The utility model can be used in the circuit of constant current or current limliting work, the average power consumption under normal condition of power consumption parts in the sort circuit is less, and after powering on certain not only will have bigger power consumption in a flash, but also require to have voltage climbing speed faster, and when power down, require again to cut off the electricity supply as soon as possible, the intelligence sensor that has microprocessor is exactly the electricity consumption device that requirement possesses such condition of work.
Claims (8)
1. the microprocessor power supply controller of a constant-current supply system, it is provided with two buses, microprocessor that articulates and corresponding constant current or current limiting device [1] and energy-storage travelling wave tube [2], it is characterized in that: it also is provided with by analog switching circuit [3], the control circuit that voltage-controlled circuit [4] and analog switch self-hold circuit [5] are formed, wherein, voltage-controlled circuit [4] is voltage-stabilizing device Z1, analog switch self-hold circuit [5] is composed in parallel by voltage-stabilizing device Z2 and capacitor C 2, described bus serial connection constant current or current limiting device [1] back are as output terminal, energy-storage travelling wave tube [2] cross-over connection is between output terminal, output+end is connected with the input end of analog switching circuit [3], the output terminal of analog switching circuit [3] is connected with the vdd terminal of microprocessor, the negative electrode of voltage-stabilizing device Z1 is connected to the input end of analog switching circuit [3], anode connects the control end of analog switching circuit [3], the anode of voltage-stabilizing device Z2 connects the output terminal of analog switching circuit [3], negative electrode connects the control end of analog switching circuit [3], bus B-the connect ground end of each circuit.
2. the microprocessor power supply controller of constant-current supply system according to claim 1, it is characterized in that: described analog switching circuit [3] is by triode T1, T2, resistance R 1, R2, R3, R4, R5 forms, the emitter of described triode T1 connects output+end, current collection is the output terminal of analog switch very, base stage connects the collector of triode T2, the emitter of triode T2 connect bus B-, resistance R 1 is connected between the base stage and emitter of triode T1, resistance R 2 is serially connected with between the collector of the base stage of triode T1 and T2, resistance R 3, the base stage of R4 one termination triode T2, the other end connects the negative electrode of voltage-stabilizing device Z1 and voltage-stabilizing device Z2 respectively, and resistance R 5 is connected between the base stage and emitter of triode T2.
3. the microprocessor power supply controller of constant-current supply system according to claim 2, it is characterized in that: triode T1, T2 in the described analog switching circuit [3] adopt field effect transistor T1, T2 respectively.
4. the microprocessor power supply controller of constant-current supply system according to claim 2 is characterized in that: the triode T1 employing field effect transistor T1 in the described analog switching circuit [3].
5. according to the microprocessor power supply controller of claim 3 or 4 described constant-current supply systems, it is characterized in that: described voltage-stabilizing device Z1, Z2 are stabilivolt, Voltage stabilizing module, light emitting diode or general-purpose diode.
6. the microprocessor power supply controller of constant-current supply system according to claim 5, it is characterized in that: described energy-storage travelling wave tube [2] is storage capacitor C1, shunt regulator tube Z3 on storage capacitor C1.
7. the microprocessor power supply controller of constant-current supply system according to claim 6, it is characterized in that: the voltage stabilizing value of described voltage-stabilizing device Z1, Z2 and stabilivolt Z3 satisfies following relation: U
Z3＞U
Z1＞U
Z2
8. according to the microprocessor power supply controller of claim 1 or 7 described constant-current supply systems, it is characterized in that: be connected to a mu balanced circuit [6] between VDD, the VSS end of the output terminal of described analog switching circuit [3] and microprocessor [7].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03237180 CN2602410Y (en) | 2003-02-10 | 2003-02-10 | Microprocessor power supply controller for the constant-current supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03237180 CN2602410Y (en) | 2003-02-10 | 2003-02-10 | Microprocessor power supply controller for the constant-current supply system |
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| Publication Number | Publication Date |
|---|---|
| CN2602410Y true CN2602410Y (en) | 2004-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03237180 Expired - Fee Related CN2602410Y (en) | 2003-02-10 | 2003-02-10 | Microprocessor power supply controller for the constant-current supply system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471574B (en) * | 2007-12-28 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Current limiter |
| CN102201666A (en) * | 2010-03-26 | 2011-09-28 | 德昌电机(深圳)有限公司 | Control circuit and motor device using control circuit |
| CN109342931A (en) * | 2018-07-25 | 2019-02-15 | 北京航天三优科技有限公司 | A kind of the power interruptions test macro and its test method of precision voltage source |
-
2003
- 2003-02-10 CN CN 03237180 patent/CN2602410Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101471574B (en) * | 2007-12-28 | 2011-07-27 | 鸿富锦精密工业（深圳）有限公司 | Current limiter |
| US7990107B2 (en) | 2007-12-28 | 2011-08-02 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Electronic device and charging control circuit |
| CN102201666A (en) * | 2010-03-26 | 2011-09-28 | 德昌电机(深圳)有限公司 | Control circuit and motor device using control circuit |
| CN109342931A (en) * | 2018-07-25 | 2019-02-15 | 北京航天三优科技有限公司 | A kind of the power interruptions test macro and its test method of precision voltage source |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |