CN202771195U - Low voltage power supply power-on sequence control circuit - Google Patents
Low voltage power supply power-on sequence control circuit Download PDFInfo
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- CN202771195U CN202771195U CN 201220460968 CN201220460968U CN202771195U CN 202771195 U CN202771195 U CN 202771195U CN 201220460968 CN201220460968 CN 201220460968 CN 201220460968 U CN201220460968 U CN 201220460968U CN 202771195 U CN202771195 U CN 202771195U
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Abstract
Disclosed is a lower voltage power supply power-on sequence control circuit, structurally comprising a conduction module composed of a voltage input terminal and a voltage output terminal, wherein a first resistor is parallelly connected between the voltage input terminal and the power supply; the voltage input terminal is further connected with a second resistor and third resistor which are grounded after being parallelly connected; the second resistor is further serially connected with a conduction component; and the control terminal of the conduction component controls the on/off of the conduction component according to the input current. The low voltage power supply power-on sequence control circuit is capable of carrying out accurate sequential control when a power supply provides power for the low voltage devices. In addition, the low voltage power supply power-on sequence control circuit is capable of freely controlling the power-on sequence of each set of the low voltage power supply, thereby meeting wider production demands.
Description
Technical field
The utility model relates to sequential control circuit, is particularly suitable for but is not limited only to low-tension supply power-on time sequence control circuit on the OLED manufacture.
Background technology
At the OLED(organic electroluminescent LED) in the research of multi-screen Driving technique (MPD) and the module exploitation, at present a lot of equipment all need several groups of Power supplies, and the electrifying timing sequence of these several groups of power supplys also has high requirements.But for some equipment that only can adopt the fixed power source module for power supply, the electrifying timing sequence of power supply is uncontrollable.When these power devices being had sequential require, just the requirement on the sequential can't have been satisfied.
The utility model content
In order freely to control the sequential that low-tension supply powers on, the utility model provides a kind of low-tension supply power-on time sequence control circuit, makes power supply can carry out accurately sequential control to low-voltage equipment when powering, and satisfies widely Production requirement.
Low-tension supply power-on time sequence control circuit of the present utility model, conduction module with voltage input end and voltage output end, be parallel with the first resistance between described voltage input end and power supply, voltage input end also is connected with the second resistance and the 3rd resistance of rear ground connection in parallel, wherein the second resistance also is in series with breakover element, and the control end of breakover element is according to the on/off of the Current Control breakover element of input.
The control end of breakover element can connect MCU and carry out the electric current input, and MCU can control the ON time of breakover element accurately.When the cut-off of MCU control breakover element, make the voltage of voltage input end of conduction module greater than the forward voltage (forward voltage is generally the conduction threshold of input voltage-conduction module) of conduction module by the first resistance and the second electric resistance partial pressure, this moment, the voltage output end of conduction module was not exported.When needs are powered to consumer, by the conducting of MCU control breakover element, the first resistance and the second resistance and the common dividing potential drop of the 3rd resistance in parallel, make the voltage of voltage input end of conduction module greater than the forward voltage of conduction module, this moment, the voltage output end of conduction module had output and suitable with input voltage.
Another kind of structure is also to have the 4th resistance and electric capacity, and ground connection in parallel with the second resistance and the 3rd resistance after the 4th resistance and the capacitances in series.When this structure can be used for not having MCU control.In the situation that there is not MCU, also can control conducting and the cut-off of breakover element by adding the 4th resistance and electric capacity, thus the control sequential.When input voltage powered on moment electric capacity is the equal of short circuit, this moment, the voltage of voltage input end of conduction module was the first resistance and the second resistance and dividing potential drop after the 4th resistance is in parallel, the suitable resistance of choosing the first suitable resistance, the second resistance and the 4th resistance makes the voltage of voltage input end of conduction module greater than the forward voltage (forward voltage is generally the conduction threshold of input voltage-conduction module) of conduction module, conduction module cut-off this moment, voltage output end is output not.After electric capacity charges gradually, behind the cut-in voltage of charging voltage greater than breakover element, the breakover element conducting.This moment, the voltage of voltage input end of conduction module was the first resistance and the second resistance and dividing potential drop after the 3rd resistance is in parallel, choose the suitable resistance of the first suitable resistance, the second resistance and the 3rd resistance, make the voltage of voltage input end of conduction module greater than the forward voltage of conduction module, conduction module conducting this moment, voltage output end has the output voltage suitable with input voltage.Can change the time of breakover element conducting by the value of changing the 4th resistance and electric capacity, but this mode can not be carried out sequential control accurately, can only control the sequencing of respectively organizing power supply electrifying.
Concrete, described breakover element is NPN type triode, also can be other element with similar functions, such as field effect transistor etc.
Concrete, described conduction module is the modular unit with field-effect tube structure, is the modular unit of IRF7314 such as model.
Low-tension supply power-on time sequence control circuit of the present utility model is that power supply can carry out accurately sequential control to low-voltage equipment when powering, and is free to control every group of low-tension supply electrifying timing sequence, has satisfied widely Production requirement.
Below in conjunction with the embodiment by the accompanying drawing illustrated embodiment, foregoing of the present utility model is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of the utility model only limits to following example.Do not breaking away from the above-mentioned technological thought situation of the utility model, various replacements or change according to ordinary skill knowledge and customary means are made all should be included in the scope of the present utility model.
Description of drawings
Fig. 1 is a kind of circuit diagram of the utility model low-tension supply power-on time sequence control circuit.
Fig. 2 is the another kind of circuit diagram of the utility model low-tension supply power-on time sequence control circuit.
Embodiment
Embodiment 1:
Low-tension supply power-on time sequence control circuit of the present utility model as shown in Figure 1, the model with voltage input end VCC and voltage output end VCC_D is the conduction module U1 of IRF7314, has comprised field-effect tube structure among the conduction module U1.Be parallel with the first resistance R 1 between described voltage input end VCC and power supply, voltage input end VCC also is connected with the second resistance R 2 and the 3rd resistance R 3 of rear ground connection in parallel, wherein the second resistance R 2 also is in series with the breakover element Q1 of NPN type audion, and the control end of breakover element Q1 is connected with external MCU by current-limiting resistance R5.
When MCU control breakover element Q1 cut-off, make the voltage of voltage input end VCC of conduction module U1 (forward voltage is generally the threshold voltage V of metal-oxide-semiconductor in input voltage-conduction module U1 greater than the forward voltage of conduction module U1 by the first resistance R 1 and the second resistance R 2 dividing potential drops
GS), the voltage output end VCC_D of conduction module U1 is less than output at this moment.When needs are powered to consumer, by MCU control breakover element Q1 conducting, the first resistance R 1 and the second resistance R 2 and the 3rd resistance R 3 common dividing potential drops in parallel, make the voltage of voltage input end VCC of conduction module U1 greater than the forward voltage of conduction module U1, this moment, the voltage output end VCC_D of conduction module U1 had output and suitable with input voltage.Thereby realize the purpose by MCU control electrifying timing sequence.
Embodiment 2:
Low-tension supply power-on time sequence control circuit of the present utility model as shown in Figure 2, the model with voltage input end VCC and voltage output end VCC_D is the conduction module U1 of IRF7314, has comprised field-effect tube structure among the conduction module U1.Be parallel with the first resistance R 1 between described voltage input end VCC and power supply, voltage input end VCC also is connected with the second resistance R 2, the 3rd resistance R 3 and the 4th resistance R 4 of rear ground connection in parallel, wherein the second resistance R 2 also is in series with the breakover element Q1 of NPN type audion, the 4th resistance R 4 is in series with capacitor C 1, and the control end of breakover element Q1 is connected between the 4th resistance R 4 and the capacitor C 1.
In the situation that there is not MCU, also can control conducting and the cut-off of breakover element Q1 by adding the 4th resistance R 4 and capacitor C 1, thus the control sequential.When input voltage powered on moment capacitor C 1 is the equal of short circuit, this moment, the voltage of voltage input end VCC of conduction module U1 was the first resistance R 1 and the second resistance R 2 and dividing potential drop after the 4th resistance R 4 is in parallel, and the suitable resistance of choosing the first suitable resistance R 1, the second resistance R 2 and the 4th resistance R 4 makes the voltage of voltage input end VCC of conduction module U1, and (forward voltage is generally the threshold voltage V of the interior metal-oxide-semiconductor of input voltage-conduction module U1 greater than the forward voltage of conduction module U1
GS), conduction module U1 cut-off this moment, voltage output end VCC_D is output not.After capacitor C 1 is charged gradually, behind the cut-in voltage of charging voltage greater than breakover element Q1, breakover element Q1 conducting.This moment, the voltage of voltage input end VCC of conduction module U1 was the first resistance R 1 and the second resistance R 2 and dividing potential drop after the 3rd resistance R 3 is in parallel, choose the suitable resistance of the first suitable resistance R 1, the second resistance R 2 and the 3rd resistance R 3, make the voltage of voltage input end VCC of conduction module U1 greater than the forward voltage of conduction module U1, conduction module U1 conducting this moment, voltage output end VCC_D has the output voltage suitable with input voltage.Can change the time of breakover element Q1 conducting by the value of changing the 4th resistance R 4 and capacitor C 1, but this mode can not be carried out sequential control accurately, can only control the sequencing of respectively organizing power supply electrifying.
Claims (4)
1. low-tension supply power-on time sequence control circuit, it is characterized by: the conduction module (U1) with voltage input end and voltage output end, be parallel with the first resistance (R1) between described voltage input end and power supply, voltage input end also is connected with the second resistance (R2) and the 3rd resistance (R3) of rear ground connection in parallel, wherein the second resistance (R2) also is in series with breakover element (Q1), and the control end of breakover element (Q1) is according to the on/off of the Current Control breakover element (Q1) of input.
2. low-tension supply power-on time sequence control circuit as claimed in claim 1, it is characterized by: also have the 4th resistance (R4) and electric capacity (C1), and ground connection in parallel with the second resistance (R2) and the 3rd resistance (R3) after the 4th resistance (R4) and electric capacity (C1) series connection.
3. low-tension supply power-on time sequence control circuit as claimed in claim 1 or 2, it is characterized by: described breakover element (Q1) is NPN type triode.
4. low-tension supply power-on time sequence control circuit as claimed in claim 1 or 2 is characterized by: described conduction module (U1) is for having the modular unit of field-effect tube structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220460968 CN202771195U (en) | 2012-09-11 | 2012-09-11 | Low voltage power supply power-on sequence control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220460968 CN202771195U (en) | 2012-09-11 | 2012-09-11 | Low voltage power supply power-on sequence control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202771195U true CN202771195U (en) | 2013-03-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220460968 Expired - Fee Related CN202771195U (en) | 2012-09-11 | 2012-09-11 | Low voltage power supply power-on sequence control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202771195U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746681A (en) * | 2013-12-24 | 2014-04-23 | 北京时代民芯科技有限公司 | Power-on/power-down output tri-state control circuit for CMOS device power supply |
-
2012
- 2012-09-11 CN CN 201220460968 patent/CN202771195U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746681A (en) * | 2013-12-24 | 2014-04-23 | 北京时代民芯科技有限公司 | Power-on/power-down output tri-state control circuit for CMOS device power supply |
| CN103746681B (en) * | 2013-12-24 | 2017-06-30 | 北京时代民芯科技有限公司 | A kind of upper and lower electricity output tri-state control circuit of cmos device power supply |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20200911 |