CN205961077U - Go up electric protection circuit - Google Patents
Go up electric protection circuit Download PDFInfo
- Publication number
- CN205961077U CN205961077U CN201620656578.7U CN201620656578U CN205961077U CN 205961077 U CN205961077 U CN 205961077U CN 201620656578 U CN201620656578 U CN 201620656578U CN 205961077 U CN205961077 U CN 205961077U
- Authority
- CN
- China
- Prior art keywords
- resistance
- semiconductor
- oxide
- metal
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model discloses a go up electric protection circuit, include main control chip IC2, go up electrical detection circuitry, go up electric starting circuit and switch circuit, go up electrical detection circuitry and constitute by R1, R2, C1 and Q1, go up electric starting circuit and constitute by S1, D1, R3, R4 and C2, switch circuit comprises Q3 and Q2, and R1, R2 and C1 establish ties and receive between VCC and the ground, and Q1's G extremely connects on R1, and Q1's D extremely connects to singlechip IC2's 1 foot, D1, R3, R4 and C2 establish ties, the G utmost point and S utmost point both ends that R4 connect at Q3, the base that R7 connects Q2 is passed through to Q2's base, and Q2's collecting electrode passes through the G utmost point that R3 is connecting Q3. The utility model discloses the switch on can automatic get into standby state when making switch be in closed state, not only can prevent to bring the potential safety hazard because of maloperation or other factors, practices thrift the energy consumption moreover, extension equipment life.
Description
Technical field
This utility model is related to a kind of circuit, more particularly, to a kind of power-on protective circuit.
Background technology
Some special electric equipments, if directly switched on power when on and off switch is in the state of closure, not only energy consumption
Larger, and be likely to, because maloperation or other factorses bring potential safety hazard, also to affect service life of equipment simultaneously.
Utility model content
This utility model is in order to solve defect and deficiency present in above-mentioned prior art, there is provided one kind makes power supply open
Closing switches on power when being in the state of closure not only can be able to prevent because of maloperation or other factorses automatically into holding state
Bring potential safety hazard, and energy efficient, the power-on protective circuit of extension device service life.
The technical solution of the utility model：A kind of power-on protective circuit, including main control chip IC2, is connected to main control chip
Power on detection circuit on IC2, electrifying startup circuit and on-off circuit,
Described power on detection circuit is made up of resistance R1, resistance R2, electric capacity C1 and metal-oxide-semiconductor Q1,
Described electrifying startup circuit is made up of on and off switch S1, diode D1, resistance R3, resistance R4 and electric capacity C2,
Described on-off circuit is made up of metal-oxide-semiconductor Q3 and audion Q2,
Described resistance R1, resistance R2 and electric capacity C1 series connection are connected between VCC and ground, and the G pole of metal-oxide-semiconductor Q1 is connected on resistance R1
On, the D pole of metal-oxide-semiconductor Q1 is connected to 1 foot of single-chip microcomputer IC2；
Described diode D1, resistance R3, resistance R4 and electric capacity C2 series connection, resistance R4 is connected on G pole and the S pole two of metal-oxide-semiconductor Q3
End；
The base stage of described audion Q2 connects the base stage of metal-oxide-semiconductor Q2, the current collection of audion Q2 by base stage current-limiting resistance R7
Pole is connected to the G pole of metal-oxide-semiconductor Q3 by resistance R3.
Preferably, the D pole of described metal-oxide-semiconductor Q3 is connected with current-limiting resistance R6, current-limiting resistance R9 and voltage stabilizing chip IC1, described
Voltage stabilizing chip IC1 two ends are connected with filter capacitor C3 and filter capacitor C4.
Preferably, the output voltage of described voltage stabilizing chip IC1 is+5V.
The control to the capacitor charge and discharge time for this utility model, by adjusting R1, the parameter of R2, C1 is it is ensured that in upper electricity
Q1 can be made to produce conduction pulses, the width of this pulse must be more than the starting time of Master control chip IC2, allow master control coremaking
Piece has time enough to go to detect the state of 1 foot after starting.Discharge and recharge to electric capacity C2 can provide in the moment of switch closure
One power-on pulse, conveniently realizes Zero-power-consumption standby.Adjust R3, the parameter of R4, C2, make the charging interval of electric capacity C2 be more than monolithic
The starting time of machine, makes single-chip microcomputer have time enough to export high level on IC2 the 2nd foot upon actuation, maintains start shape
State；So that on and off switch switch on power when being in the state of closure can automatically into holding state, not only can prevent because
Maloperation or other factorses bring potential safety hazard, and energy efficient, extension device service life.
Brief description
Fig. 1 is circuit theory diagrams of the present utility model.
Specific embodiment
With work process, this utility model is described in further detail below in conjunction with the accompanying drawings, but is not to this practicality
The restriction of novel protected scope.
As shown in figure 1, a kind of power-on protective circuit, including main control chip IC2, the upper electricity being connected on main control chip IC2
Testing circuit, electrifying startup circuit and on-off circuit,
Described power on detection circuit is made up of resistance R1, resistance R2, electric capacity C1 and metal-oxide-semiconductor Q1,
Described electrifying startup circuit is made up of on and off switch S1, diode D1, resistance R3, resistance R4 and C2,
Described on-off circuit is made up of metal-oxide-semiconductor Q3 and audion Q2,
Described resistance R1, resistance R2 and electric capacity C1 series connection are connected between VCC and ground, and the G pole of metal-oxide-semiconductor Q1 is connected on resistance R1
On, the D pole of metal-oxide-semiconductor Q1 is connected to 1 foot of single-chip microcomputer IC2；
Described diode D1, resistance R3, resistance R4 and electric capacity C2 series connection, resistance R4 is connected on G pole and the S pole two of metal-oxide-semiconductor Q3
End；
The base stage of described audion Q2 connects the base stage of metal-oxide-semiconductor Q2, the current collection of audion Q2 by base stage current-limiting resistance R7
Pole is connected to the G pole of metal-oxide-semiconductor Q3 by resistance R3.
The D pole of described metal-oxide-semiconductor Q3 is connected with current-limiting resistance R6, current-limiting resistance R9 and voltage stabilizing chip IC1, described voltage stabilizing chip
IC1 two ends are connected with filter capacitor C3 and filter capacitor C4.
The output voltage of described voltage stabilizing chip IC1 is+5V.
Normal workflow of the present utility model：Switch on power, VCC passes through resistance R2 and resistance R1 and electric capacity C1 is charged,
Charging current produces voltage on resistance R1 makes metal-oxide-semiconductor Q1 turn on, and the 1st foot of main control chip IC2 is low level；When electric capacity C1 fills
After the completion of electricity, charging current is 0, and the G pole tension of metal-oxide-semiconductor Q1 is 0, and metal-oxide-semiconductor Q1 ends, and the 1st foot of main control chip IC2 is by interior
Portion pulls up as high level；Now on and off switch S1 closure, VCC passes through on and off switch S1, D1, resistance R4 and resistance R3 to electric capacity C2
Charge, resistance R4 produces voltage drop, so that metal-oxide-semiconductor Q3 is turned on, provide power supply for voltage stabilizing chip IC1.VCC is through voltage stabilizing chip
IC1 voltage stabilizing is that the power supply of+5V is supplied to main control chip IC2, and main control chip IC2 exports high level in 2 feet after starting immediately, makes three
Pole pipe Q2 turns on, and maintains on off state, and then 1 foot of detection main control chip IC2 maintains main control chip IC2's if high level
2 foot outputs, equipment enters normal operating conditions.
Upper electric protection process of the present utility model：Before switching on power, on and off switch S1 is in closure state, when switching on power
VCC passes through resistance R2 and resistance R1 and electric capacity C1 is charged, and charging current produces voltage on resistance R1 makes metal-oxide-semiconductor Q1 turn on, main
1st foot of control chip IC 2 is low level；Because on and off switch S1 is in closure state, main control chip IC2 also can be immediately in upper electricity
Work, at this moment detect main control chip IC2 1 foot be low level so that it may judge due to abnormal electrifying, Master control chip IC2 is 2
Foot exports low level, closes audion Q2, cutting-off controlling circuit power, realizes low power consumption standby, until artificially conscious
On and off switch S1, from closure state, gets to disconnection, is then closed again, and at this moment due to electric capacity C1 charging complete, metal-oxide-semiconductor Q1 cuts
Only, the 1st foot of main control chip IC2 is high level, and equipment just can enter normal operating conditions.
Claims (3)
1. a kind of power-on protective circuit it is characterised in that：It includes main control chip IC2, the upper electricity being connected on main control chip IC2
Testing circuit, electrifying startup circuit and on-off circuit,
Described power on detection circuit is made up of resistance R1, resistance R2, electric capacity C1 and metal-oxide-semiconductor Q1,
Described electrifying startup circuit is made up of on and off switch S1, diode D1, resistance R3, resistance R4 and electric capacity C2,
Described on-off circuit is made up of metal-oxide-semiconductor Q3 and audion Q2,
Described resistance R1, resistance R2 and electric capacity C1 series connection are connected between VCC and ground, and the G pole of metal-oxide-semiconductor Q1 is connected on resistance R1, MOS
The D pole of pipe Q1 is connected to 1 foot of single-chip microcomputer IC2；
Described diode D1, resistance R3, resistance R4 and electric capacity C2 series connection, resistance R4 is connected on G pole and the S pole two ends of metal-oxide-semiconductor Q3；
The base stage of described audion Q2 connects the base stage of metal-oxide-semiconductor Q2 by base stage current-limiting resistance R7, and the colelctor electrode of audion Q2 leads to
Cross the G pole that resistance R3 is connected to metal-oxide-semiconductor Q3.
2. a kind of power-on protective circuit according to claim 1 it is characterised in that：The D pole of described metal-oxide-semiconductor Q3 connects limited
Leakage resistance R6, current-limiting resistance R9 and voltage stabilizing chip IC1, described voltage stabilizing chip IC1 two ends are connected with filter capacitor C3 and filtered electrical
Hold C4.
3. a kind of power-on protective circuit according to claim 2 it is characterised in that：The output electricity of described voltage stabilizing chip IC1
Press as+5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620656578.7U CN205961077U (en) | 2016-06-29 | 2016-06-29 | Go up electric protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620656578.7U CN205961077U (en) | 2016-06-29 | 2016-06-29 | Go up electric protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205961077U true CN205961077U (en) | 2017-02-15 |
Family
ID=57970061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620656578.7U Expired - Fee Related CN205961077U (en) | 2016-06-29 | 2016-06-29 | Go up electric protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205961077U (en) |
-
2016
- 2016-06-29 CN CN201620656578.7U patent/CN205961077U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203339772U (en) | Electronic cigarette USB charger | |
| CN107240948A (en) | Portable energy-storing battery charge-discharge control method and system | |
| CN103248100B (en) | A kind of back-up power source charging-dischargingcontrol control circuit | |
| CN104753157A (en) | TOPSwitch-GX series integrated chip control-based charger | |
| CN103457314B (en) | A kind of switching mode single lithium battery charging and step-up discharge control chip | |
| CN207732504U (en) | Power supply automatic switchover circuit and intelligent electric meter microcontroller chip | |
| CN201213231Y (en) | Portable mobile power source | |
| CN103326433B (en) | Powering portable devices control circuit and portable monitor | |
| CN205427505U (en) | Zero power consumption standby circuit and electronic product | |
| CN205961077U (en) | Go up electric protection circuit | |
| CN203289174U (en) | Full-automatic large-power LED lamp power supply circuit | |
| CN104065043B (en) | Battery under-voltage protection and display circuit | |
| CN203933057U (en) | A kind of portable multi-function portable power source | |
| CN202888925U (en) | Charging protector for electric vehicle | |
| CN206506281U (en) | Battery low-voltage protection circuit and electronic equipment | |
| CN105871045B (en) | A kind of charging circuit being used in solar control system | |
| CN205960779U (en) | P type monitoring formula switching power | |
| CN204349419U (en) | Power-off trip protection plug | |
| CN203982509U (en) | Intelligent sound acoustic-optic alarm | |
| CN107069909A (en) | A kind of energy-saving mobile phone charger that can be automatically powered off | |
| CN207902205U (en) | A kind of electric car charger | |
| CN206807046U (en) | Smart machine low battery charging indicator light switching circuit | |
| CN205648118U (en) | Regard as power supply's LED light in order to discard dry battery | |
| CN205945205U (en) | Emergency lighting lamp with timing charge protection function | |
| CN204858532U (en) | Mobile phone lithium battery crosses to fill puts protection circuit |
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: 20170215 Termination date: 20170629 |