CN202906445U - Energy supply device for monitoring system - Google Patents
Energy supply device for monitoring system Download PDFInfo
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- CN202906445U CN202906445U CN 201220479042 CN201220479042U CN202906445U CN 202906445 U CN202906445 U CN 202906445U CN 201220479042 CN201220479042 CN 201220479042 CN 201220479042 U CN201220479042 U CN 201220479042U CN 202906445 U CN202906445 U CN 202906445U
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Abstract
The utility model discloses an energy supply device for a monitoring system, which comprises the following components: a power input module which is used for converting external power supply to DC output; a voltage conversion module which is used for converting DC output of the power input module to at least one DC output for supplying power to a chip power supply module; and a voltage monitoring module which is used for detecting the voltage of the DC power that is output from the power input module and correspondingly controls operation of the voltage conversion module. The energy supply device for the monitoring system has the following advantages: reasonable design concept, simple structure and wide application. Energy to the chip power supply module can be immediately switched off at an instant when the voltage is overlow, thereby preventing chip power supply module damage and incapability of operating normally because of overlow power supply voltage. The energy supply device for the monitoring system can continue operation after the voltage returns to normal, thereby improving reliability of the whole system.
Description
Technical field
The utility model relates to technical field of video monitoring, particularly relates to a kind of power supply device of supervisory control system.
Background technology
Along with the development in monitoring field, the design of circuit becomes increasingly complex, and the chip of low-power consumption multiple voltage supply is also more and more.These chips are mostly very responsive to voltage fluctuation, at present large multi-product has only been paid attention to the power up of voltage, and ignored the harm that the rear voltage fluctuation of powering on exists, recover again normal after for example running into transient voltage and undercuting, probably cause the breaking-up of power supply chip this moment or because brownout causes work undesired, in this case, whole circuit can not stable operation, especially the occasion that powers on again after not allowing to cut off the power supply, the irregular operation of low-voltage can produce even more serious consequence.
Summary of the invention
The purpose of this utility model is for the technological deficiency that exists in the prior art, and a kind of power supply device of supervisory control system is provided.
For realizing that the technical scheme that the purpose of this utility model adopts is:
A kind of power supply device of supervisory control system comprises,
Power Entry Module, it is in order to be converted to external power source direct current output;
Voltage transformation module is used for direct current output with Power Entry Module and is converted at least one direct current and exports with to the energy supply of chip power supply module;
The voltage monitoring module, for detection of the voltage of Power Entry Module output DC and the described voltage transformation module work of corresponding control whether.
Described voltage transformation module has enable pin, and described enable pin links to each other with the output of voltage monitoring module.
The voltage transitions chip is the DC-DC transducer.
Be provided with both triodes of coupling between the output of described enable pin and voltage monitoring module.
Compared with prior art, the beneficial effects of the utility model are:
The utility model circuit has characteristics reasonable in design, simple in structure, widely used, can be when brownout moment cut off immediately energy supply to the chip power supply module, prevent the chip power supply module destroyed or because the energy supply brownout cause cisco unity malfunction, after voltage recovers normally, can work on, improve the reliability of whole system.
Description of drawings
Figure 1 shows that structured flowchart of the present utility model;
Figure 2 shows that the circuit diagram of the utility model specific embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the power supply device of supervisory control system of the present utility model comprises Power Entry Module 1, voltage transformation module 2 and voltage monitoring module 3 and chip power supply module 4.Wherein, described Power Entry Module 1 is in order to be converted to direct current with civil power or other forms of power supply, in general, described Power Entry Module can adopt switching regulator transformation form or other forms of transformation, be converted to the direct current of 12V with the alternating current with civil power 220V, external power source is converted to the direct current of 12V, can guaranteeing that the interference between chip internal is reduced.
The described voltage transformation module 2 preferred multi-output dc-DC transducers that adopt, it can be converted at least two lower different voltage dcs with a direct current input and export with the difference energy supply to different chip power supply modules, for ease of whether its work is controlled, preferably this voltage transformation module has enable pin simultaneously.
For detection of the voltage of Power Entry Module output DC and the described voltage transformation module work of corresponding control whether described voltage monitoring module 3, for realizing the control to voltage transformation module, described voltage transformation module has enable pin, and described enable pin links to each other with the output of voltage monitoring module.Output is not mated for enable pin and voltage monitoring module, does not mate etc. such as size, all can realize by the reverse amplification of bleeder circuit or triode, specifically sees with reference to following specific embodiment.
Detect the output voltage of Power Entry Module by the voltage monitoring module, it can feed back to voltage transformation module with change in voltage immediately when output voltage changes, it is quit work, stop to each chip power supply module energy supply, each chip is quit work, the chip power supply module infringement of avoiding shakiness that operating on low voltage causes or brownout to cause.
Figure 2 shows that the circuit diagram of a specific embodiment of the present utility model.Mainly be to have adopted two existing chips and a triode in the drawings, its circuit is the general setting of the peripheral circuit of chip, no longer specifically describes at this.
Voltage transformation module is selected DC-DC chip TPS54386PWP in the present embodiment, and it can be a 3.3V direct current output with the 12V voltage transitions of input, and a 1.4V direct current output is to give respectively different chip power supply module energy supplies.It is with enable pin simultaneously, the effective voltage of this enable pin is 1.2V, when this enable pin input voltage during less than 1.2V this voltage transformation module can work and carry out voltage transitions, when the input voltage of this enable pin during greater than 1.2V this voltage transformation module quit work, stop to each chip power supply module energy supply.
Wherein, described voltage monitoring module comprises chip MAX16053AUT+T and triode S8050, chip MAX16053AUT+T mainly carries out Real-Time Monitoring and corresponding output control voltage to voltage, and triode S8050 realizes the reverse amplification of chip MAX16053AUT+T output control voltage and time-delay shaping to satisfy the demand that enables of voltage transformation module.
It is 0.5V that described chip MAX16053AUT+T is higher than its input threshold voltage that resets of Vth(at the voltage of Vin pin) and EN pin when being high level, the OUT pin is high level, i.e. output control voltage is high level; When the voltage drop of Vin pin below 0.495V or EN pin when being low level, the OUT pin is placed low level state immediately, i.e. output control voltage is low level.For utilizing this chip MAX16053AUT+T that the 12V DC power supply of Power Entry Module is detected, described voltage monitoring module also comprises the bleeder circuit between the Vin pin that is arranged on Power Entry Module and chip MAX16053AUT+T, described bleeder circuit is made of resistance R 13 and the R15 of two series connection ground connection, the resistance ratio of described two resistance is determined by the monitoring voltage of setting, is not described in detail at this.
Because the enable pin of TPS54386PWP chip is Low level effective, the utility model adopts triode Q1(S8050) after oppositely being amplified, the voltage of MAX16053AUT+T chip OUT pin output inputs to again the enable pin of TPS54386PWP chip.
When voltage at 12V when fluctuating between the monitoring voltage of setting, the OUT pin of AX16053AUT+T sends high level, after the Q1 voltage reversal, the enable pin of TPS54386PWP chip enables, the voltage transformation module normal operation, the voltage stabilization of power supply chip module can guarantee the Systems balanth reliability service; When voltage was lower than monitoring voltage, the OUT pin of MAX16053AUT+T sent low level, and after the Q1 voltage reversal, the enable pin of TPS54386PWP chip does not enable, and voltage transformation module quits work, and whole system is also out of service to avoid infringement to occur.
The above only is preferred implementation of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. the power supply device of a supervisory control system is characterized in that, comprise,
Power Entry Module, it is in order to be converted to external power source direct current output;
Voltage transformation module is used for direct current output with Power Entry Module and is converted at least one direct current and exports with to the energy supply of chip power supply module;
The voltage monitoring module, for detection of the voltage of Power Entry Module output DC and the described voltage transformation module work of corresponding control whether.
2. the power supply device of supervisory control system as claimed in claim 1 is characterized in that, described voltage transformation module has enable pin, and described enable pin links to each other with the output of voltage monitoring module.
3. the power supply device of supervisory control system as claimed in claim 2 is characterized in that, the voltage transitions chip is the DC-DC transducer.
4. the power supply device of supervisory control system as claimed in claim 2 is characterized in that, is provided with both triodes of coupling between the output of described enable pin and voltage monitoring module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220479042 CN202906445U (en) | 2012-09-18 | 2012-09-18 | Energy supply device for monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220479042 CN202906445U (en) | 2012-09-18 | 2012-09-18 | Energy supply device for monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202906445U true CN202906445U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220479042 Expired - Fee Related CN202906445U (en) | 2012-09-18 | 2012-09-18 | Energy supply device for monitoring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202906445U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109035590A (en) * | 2018-06-21 | 2018-12-18 | 广东工业大学 | A kind of intelligent electric meter and electricity charge charging system |
| CN109188976A (en) * | 2018-09-14 | 2019-01-11 | 珠海格力电器股份有限公司 | A kind of control chip |
-
2012
- 2012-09-18 CN CN 201220479042 patent/CN202906445U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109035590A (en) * | 2018-06-21 | 2018-12-18 | 广东工业大学 | A kind of intelligent electric meter and electricity charge charging system |
| CN109188976A (en) * | 2018-09-14 | 2019-01-11 | 珠海格力电器股份有限公司 | A kind of control chip |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20150918 |
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| EXPY | Termination of patent right or utility model |