CN202918194U - Controller with power supply voltage stabilizing circuit - Google Patents
Controller with power supply voltage stabilizing circuit Download PDFInfo
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- CN202918194U CN202918194U CN 201220576646 CN201220576646U CN202918194U CN 202918194 U CN202918194 U CN 202918194U CN 201220576646 CN201220576646 CN 201220576646 CN 201220576646 U CN201220576646 U CN 201220576646U CN 202918194 U CN202918194 U CN 202918194U
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- circuit
- controller
- power supply
- effect transistor
- field effect
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Abstract
A controller with a power supply voltage stabilizing circuit is provided. The controller is characterized in that the controller is provided with a bootstrap circuit, an input end of the bootstrap circuit is connected with a drain electrode of a field effect transistor, an output end is connected with a grid electrode of the field effect transistor; a boost circuit, an output end of the boost circuit is connected with the grid electrode of the field effect transistor, an input end is connected with a controller internal power supply; an anti reversal connection circuit in which diodes are adopted, an anode is connected with a system power supply, and a cathode is connected with the drain electrode of the field effect transistor; a clamp circuit which is connected with an input end of the controller internal circuit, one end of the clamp circuit is connected with the controller internal power supply end, and the other end is connected with the ground. The controller can work under the normal power supply voltage of a system; can be used for maintaining a stable controller power supply when voltage of the system rises; can be used for protecting internal devices of the controller, avoiding high voltage damage and supplying power continuously; and costs are low and reliability is high.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly relates to a kind of controller with power supply stabilization circuit that the power supply of engineering machinery is controlled.
Background technology
The power supply of engineering machinery is provided by storage battery and generator usually, because the fluctuation of engine loading, and the fault of the circuit bad connection that may exist, cause the voltage stabilizing situation of system power supply to happen occasionally, when serious such as the situation of throw load occur, can puncture TVS or other power supply chips, usually use the mode of TVS in parallel or increase current-limiting resistance to solve, corresponding meeting increases a lot of costs or PCB area of dissipation.Cause unnecessary energy waste.
The utility model content
The purpose of this utility model just provides a kind of can work under the normal supply voltage of system; also can when raising, keep system voltage stable controller power source; the protection controller internal components avoids high pressure to damage the also controller with power supply stabilization circuit of continued power.
Solution of the present utility model is such:
The utlity model has:
(1), boostrap circuit, the input of described boostrap circuit is connected with the drain electrode of field effect transistor, output links to each other with the grid of field effect transistor;
(2), booster circuit, the output of described booster circuit is connected to the grid of field effect transistor, input connects the controller internal electric source, the pressure reduction of the internal electric source of its output voltage and controller satisfies the Vgs of field effect transistor;
(3), reverse-connection preventing circuit, reverse-connection preventing circuit adopts diode, its anode welding system power supply, negative electrode connects the drain electrode of field effect transistor; At normal access state system power supply is exported, when improper access state since the unilateral conduction of diode so that current cut-off, system power supply is isolated the protection power source voltage stabilizing circuit with power supply stabilization circuit;
(4), clamp circuit, be connected with clamp circuit at the input of described controller internal electric source, described clamp circuit one terminates at controller internal electrical source, other end ground connection; Described clamp circuit is connected on controller internal electrical source, is used for the stability controller internal power source voltage.
Further: described clamp circuit is to adopt zener diode.
The utility model has the advantages that and can work under the normal supply voltage of system, also can keep stable controller power source when system voltage raises, the protection controller internal components avoids high pressure to damage and continued power, and cost is low, reliability is high.
Description of drawings
Accompanying drawing is embodiment of the present utility model.
Accompanying drawing 1 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figure 1, present embodiment has:
(1), reverse-connection preventing circuit 5, reverse-connection preventing circuit 5 adopts diodes, its anode welding system power supply 1, negative electrode connects the drain electrode of field effect transistor 4; At normal access state system power supply is exported, when improper access state since the unilateral conduction of diode so that current cut-off, system power supply is isolated the protection power source voltage stabilizing circuit with power supply stabilization circuit;
(2), boostrap circuit 6, the input of described boostrap circuit 6 is connected with the drain electrode of field effect transistor 4, output links to each other with the grid of field effect transistor 4; When system power supply begins to power, by boostrap circuit so that the drain electrode of field effect transistor 4 and grid voltage are close, after system power supply is stable, because the grid of field effect transistor 4 links to each other with booster circuit 3, the voltage of the grid of field effect transistor 4 is higher than system power supply voltage at this moment, so boostrap circuit is in cut-off state.
(3), booster circuit 3, the output of described booster circuit 3 is connected to the grid of field effect transistor 4, input connects the controller internal electric source; The pressure reduction of the internal electric source of its output voltage and controller satisfies the Vgs of field effect transistor 4; Its supply power voltage is powered by the controller internal electric source.
(4), clamp circuit 8, be connected with clamp circuit (8) at the input of described controller internal electric source 2, described clamp circuit 8 one terminates at controller internal electrical source, other end ground connection; Be used for the stability controller internal power source voltage.
Described reverse-connection preventing circuit 5 adopts voltage stabilizing didoe, its sun level welding system power supply 1, and negative electrode is the system power supply output.
Described boostrap circuit 6 is the series circuit of resistance R 1 and diode D2, and the input of resistance R 1 connects the output of reverse-connection preventing circuit 5, and the negative terminal of diode D2 links to each other with the grid of field effect transistor 4.
Described clamp circuit 8 is to adopt zener diode.
Described field effect transistor 4 is a NMOSFET.
Voltage stabilizing process of the present utility model is:
When system power supply begins to power, power for the grid of field effect transistor 4 by boostrap circuit 6, work as V
GSDuring greater than 4V, the source electrode of field effect transistor 4 begins output voltage, and when the source voltage of field effect transistor 4 reaches 9V when above, controller internal electric source 2 is started working, booster circuit 3 electric and output high pressure, this moment, boostrap circuit 6 quit work.Usually can guarantee that the controller internal electric source satisfies job requirement about the high 10V of source electrode normal voltage of output voltage than field effect transistor 4 of booster circuit.
When high pressure appears in system, because V
GS=10V, and the voltage of booster circuit is constant, so the source voltage of field effect transistor 4 also remains unchanged, the high-pressure section of system power supply is distributed on the Vds, by the form consumption of heating, guarantees the voltage stabilization of controller internal electric source 2.
Claims (5)
1. the controller with power supply stabilization circuit comprises reverse-connection preventing circuit (5), it is characterized in that:
Also comprise:
(1), boostrap circuit (6), the input of described boostrap circuit (6) is connected with the drain electrode of field effect transistor (4), output links to each other with the grid of field effect transistor (4);
(2), booster circuit (3), the output of described booster circuit (3) is connected to the grid of field effect transistor (4), input connects controller internal electric source (2), and the pressure reduction of the internal electric source of its output voltage and controller satisfies the Vgs of field effect transistor (4).
2. the controller with power supply stabilization circuit according to claim 1 is characterized in that: described reverse-connection preventing circuit (5) adopts diode, its anode welding system power supply (1), and negative electrode connects the drain electrode of field effect transistor (4).
3. the controller with power supply stabilization circuit according to claim 1, it is characterized in that: described boostrap circuit (6) is the series circuit of resistance (R1) with diode (D2), the input of resistance (R1) connects the output of reverse-connection preventing circuit (5), and the negative electrode of diode (D2) links to each other with the grid of field effect transistor (4).
4. the controller with power supply stabilization circuit according to claim 1, it is characterized in that: the input at described controller internal electric source (2) is connected with clamp circuit (8), described clamp circuit (8) terminates at controller internal electrical source, other end ground connection.
5. the controller with power supply stabilization circuit according to claim 4 is characterized in that: described clamp circuit (8) is to adopt voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576646 CN202918194U (en) | 2012-11-05 | 2012-11-05 | Controller with power supply voltage stabilizing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220576646 CN202918194U (en) | 2012-11-05 | 2012-11-05 | Controller with power supply voltage stabilizing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202918194U true CN202918194U (en) | 2013-05-01 |
Family
ID=48166469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220576646 Expired - Fee Related CN202918194U (en) | 2012-11-05 | 2012-11-05 | Controller with power supply voltage stabilizing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202918194U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051138A (en) * | 2017-12-11 | 2018-05-18 | 广州瑞立科密汽车电子股份有限公司 | A kind of pressure-detecting device of trailer gas tank |
-
2012
- 2012-11-05 CN CN 201220576646 patent/CN202918194U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051138A (en) * | 2017-12-11 | 2018-05-18 | 广州瑞立科密汽车电子股份有限公司 | A kind of pressure-detecting device of trailer gas tank |
| CN108051138B (en) * | 2017-12-11 | 2023-12-29 | 广州瑞立科密汽车电子股份有限公司 | Pressure detection device of trailer air tank |
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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: 20130501 Termination date: 20181105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |