CN206471639U - A kind of insert row with USB output interfaces - Google Patents
A kind of insert row with USB output interfaces Download PDFInfo
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- CN206471639U CN206471639U CN201720202363.2U CN201720202363U CN206471639U CN 206471639 U CN206471639 U CN 206471639U CN 201720202363 U CN201720202363 U CN 201720202363U CN 206471639 U CN206471639 U CN 206471639U
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- electric capacity
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Abstract
The utility model discloses a kind of insert row with USB output interfaces, it includes startup control circuit, start control circuit and include rectifier bridge, the negative pole ground connection of rectifier bridge DC output end, the positive pole of its DC output end passes through the first electric capacity for being sequentially connected in series, first resistor and the second capacity earth, the tie point of first resistor and the second electric capacity is also connected to the drain electrode of a metal-oxide-semiconductor by a current-limiting resistance, the tie point of first resistor and the second electric capacity is additionally coupled to the grid of metal-oxide-semiconductor, the source electrode of metal-oxide-semiconductor is additionally coupled to the anode of a fly-wheel diode, the negative electrode of fly-wheel diode passes through one the 3rd capacity earth, the tie point of fly-wheel diode and the 3rd electric capacity is PWM power ends, the PWM power ends are additionally coupled to the negative electrode of one first diode, the anode of first diode is grounded by the secondary main winding of transformer.The utility model can smaller consumption to power, improve the service life of complete machine.
Description
Technical field
The utility model is related to insert row, more particularly to a kind of insert row with USB output interfaces.
Background technology
Insert row is the equipment commonly used in daily life, in the prior art, and the insert row with USB interface refers to cross, straight
The insert row of output is flowed, the wherein Power convert part of AC-to DC will input usually using flyback high frequency transformer, export back
Road isolates, and the part overall volume is small, simple in construction, in direct current supply occasion, is used widely.In power-switching circuit,
When switching tube is connected, output transformer serves as inductance, and electric energy is converted into magnetic energy, now output loop no current；Opened on the contrary, working as
When closing pipe shut-off, output transformer releases energy, and magnetic energy, which is converted into electric energy, output loop, electric current.Power-switching circuit exists
Start moment, it is necessary to from input line power taking pressure, powered to pwm chip, when start event complete, pwm chip by
Ancillary coil winding power.Under normal circumstances, Power convert part needs to add start-up circuit, widely used from input at present
Powered by resistance current limliting directly to pwm chip, this circuit structure has the disadvantage that：Start-up circuit is not due to possessing
Automatic shutoff function and be chronically at power-up state, after power-switching circuit has been started up, current-limiting resistance still has electric current to flow through, and disappears
The certain power of consumption, influence overall efficiency and service life.
Utility model content
The technical problems to be solved in the utility model is that, there is provided a kind of insert row with USB output interfaces, its power supply turns
Changing the start-up circuit of part has the function of being automatically shut down after startup, and then improves the overall efficiency of product, and extension uses the longevity
Life.
In order to solve the above technical problems, the utility model is adopted the following technical scheme that.
A kind of insert row with USB output interfaces, it includes shell, and the shell is inserted provided with AC socket and USB
Wiring board is provided with seat, the shell, the wiring board is provided with：One transformer, its input connection AC socket, for inciting somebody to action
From output end output after the alternating voltage decompression transformation of AC socket input；One EMI filter circuit, its input is connected to described
The output end of transformer, for filtering out high-frequency impulse interference signal；One rectification circuit, its input is connected to the EMI filtering
The output end of circuit, for the AC rectification of input to be exported after Rectified alternating current from output end；One BOOST boosting electricity
Road, its input connects the output end of the rectification circuit, for will be exported after input voltage boosting inverter to USB socket；One
PWM generator, its input connects the output end of the rectification circuit, boosts electric for output pulse width modulated signal to BOOST
The drive end on road, to drive BOOST booster circuits to export lasting DC voltage；One starts control circuit, the startup control
Circuit includes a rectifier bridge, and the DC output end of the rectifier bridge passes through the first electric capacity being sequentially connected in series, first resistor and
The tie point of two capacity earths, first resistor and the second electric capacity is also connected to the drain electrode of a metal-oxide-semiconductor, first by a current-limiting resistance
The tie point of resistance and the second electric capacity is additionally coupled to the grid of metal-oxide-semiconductor, and the source electrode of metal-oxide-semiconductor is connected to the moon of one first voltage-stabiliser tube
Pole, the plus earth of the first voltage-stabiliser tube, the source electrode of metal-oxide-semiconductor is additionally coupled to the anode of a fly-wheel diode, the moon of fly-wheel diode
Pole is by one the 3rd capacity earth, and the tie point of fly-wheel diode and the 3rd electric capacity is PWM power ends, and the PWM power ends are used
Powered in for PWM generator, the PWM power ends are additionally coupled to the negative electrode of one first diode, the anode of first diode leads to
Cross the vice-side winding ground connection of transformer.
Preferably, the tie point of the first resistor and the second electric capacity is additionally coupled to the negative electrode of one second voltage-stabiliser tube, described
The plus earth of second voltage-stabiliser tube.
Preferably, the quantity of the AC socket is multiple.
Preferably, the shell is provided with groove, and the groove is elongated, and multiple AC sockets are divided into groove two
Side.
In a kind of insert row with USB output interfaces disclosed in the utility model, in power of alterating and direct current conversion portion, pass through
The open-minded of metal-oxide-semiconductor is controlled, PWM power ends is produced and starts voltage, PWM generator works on power, to make BOOST booster circuits will
Exported after input voltage boosting inverter to USB socket, after metal-oxide-semiconductor is turned off, charged by assists winding for the 3rd electric capacity, make PWM
Power end produce continuous voltage and be that PWM generator is powered.This circuit structure, the effect with control metal-oxide-semiconductor automatic shutoff, phase
Than it is existing start control circuit for, the utility model will not be chronically at power-up state, it is to avoid consumption to power, together
When, also improve the service life of complete machine.
Brief description of the drawings
Fig. 1 is stereogram of the present utility model.
Fig. 2 is circuit block diagram of the present utility model.
Fig. 3 controls the circuit theory diagrams of circuit to start.
Embodiment
The utility model is described in more detail with reference to the accompanying drawings and examples.
The utility model discloses a kind of insert row with USB output interfaces, with reference to shown in Fig. 1 to Fig. 3, it includes outer
Shell 1, the shell 1, which is provided with AC socket 2 and USB socket 70, the shell 1, is provided with wiring board, is set on the wiring board
Have：
One transformer 10, its input connection AC socket 2, for the AC voltage drop buckling for inputting AC socket 2
Exported after changing from output end；
One EMI filter circuit 20, its input is connected to the output end of the transformer 10, is done for filtering out high-frequency impulse
Disturb signal；
One rectification circuit 30, its input is connected to the output end of the EMI filter circuit 20, for by the friendship of input
Electric rectification is flowed to export from output end after Rectified alternating current；
One BOOST booster circuits 50, its input connects the output end of the rectification circuit 30, for by input voltage liter
Buckling is exported after changing to USB socket 70；
One PWM generator 40, its input connects the output end of the rectification circuit 30, for output pulse width modulated signal
To the drive end of BOOST booster circuits 50, to drive BOOST booster circuits 50 to export lasting DC voltage；
One starts control circuit 80, and the control circuit 80 that starts includes a rectifier bridge DB1, the rectifier bridge DB1's
DC output end is grounded by the first electric capacity C1, the first resistor R1 that are sequentially connected in series and the second electric capacity C2, first resistor R1 and the
Two electric capacity C2 tie point is also connected to the drain electrode of a metal-oxide-semiconductor Q1, first resistor R1 and the second electric capacity by a current-limiting resistance R2
C2 tie point is additionally coupled to metal-oxide-semiconductor Q1 grid, and metal-oxide-semiconductor Q1 source electrode is connected to one first voltage-stabiliser tube DZ1 negative electrode, first
Voltage-stabiliser tube DZ2 plus earth, metal-oxide-semiconductor Q1 source electrode is additionally coupled to the anode of a sustained diode 2, sustained diode 2
Negative electrode is grounded by one the 3rd electric capacity C3, and the electric capacity C3 of sustained diode 2 and the 3rd tie point is PWM power end VCC, described
PWM power ends VCC is used to power for PWM generator 40, and PWM power ends VCC is additionally coupled to one first diode D1 negative electrode,
First diode D1 anode is grounded by the vice-side winding T1 of transformer 10.
In foregoing circuit structure, during rectifier bridge DB1 ac input end access power network, electric current passes through the first electric capacity C1, the
One resistance R1 and the second electric capacity C2 are circulated to ground, and now the first electric capacity C1 and the second electric capacity C2 is charged and the voltage of the two is opened from zero
Begin to rise, when the second electric capacity C2 voltage rises to when opening threshold value of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q1 is turned on, and now, electric current passes through
First rectifying tube DB1, the first electric capacity C1, first resistor R1, the electric capacity C3 of sustained diode 2 and the 3rd ground connection, now, the 3rd electricity
Hold C3 chargings and its charging voltage rises to DZ2 clamp voltage, PWM power ends VCC is produced voltage and be PWM generator confession
Electricity.After the first electric capacity C1 and the second electric capacity C2 fully charged, the electric current for flowing through first resistor R1 is zero, the second electric capacity C2 electricity
Pressure constantly reduces, until metal-oxide-semiconductor Q1 shut-offs, start-up circuit cut-off.Now, the 3rd electric capacity C3, assists winding T1 and the one or two pole
Pipe D1 formation loop, the 3rd electric capacity C3 continue by assists winding T1 provide charging current, with make PWM power ends VCC can continue
Powered for PWM generator, circuit start is completed.This circuit structure, it has the effect of control metal-oxide-semiconductor Q1 automatic shutoffs, compared
For existing startup control circuit, the utility model will not be chronically at power-up state, reduce the consumption to power, together
When, also improve the service life of complete machine.
In the present embodiment, first resistor R1 and the second electric capacity C2 tie point are additionally coupled to one second voltage-stabiliser tube DZ2 the moon
Pole, the second voltage-stabiliser tube DZ2 plus earth.In the presence of the second voltage-stabiliser tube DZ2 clamp voltages, can prevent metal-oxide-semiconductor Q1 because
The overtension of grid and damage.In the present embodiment, because the time constant of start-up circuit is τ=R1*C1, it therefore, it can lead to
First resistor R1 and the first electric capacity C1 are overregulated and the delay time for further adjusting start-up circuit, so as to adjust LED driving electricity
The average standby power of the work/intermittent condition in source, further reduction LED drive power.The exchange input of the rectifier bridge DB1
End is also connected to power network by a switch S1, can be electric on the utility model by closure switch S1 in practical application.
Further, the quantity of the AC socket 2 is multiple.In the present embodiment, the shell 1 is provided with groove 3, institute
State groove 3 elongated, multiple AC sockets 2 are divided into the both sides of groove 3.
In a kind of insert row with USB output interfaces disclosed in the utility model, by controlling metal-oxide-semiconductor Q1's open-minded, make
PWM power ends VCC, which is produced, starts voltage, after metal-oxide-semiconductor Q1 is turned off, is charged by assists winding T1 for the 3rd electric capacity C3, makes PWM electricity
Source VCC produce continuous voltage and be that PWM generator is powered.This circuit structure, the work with control metal-oxide-semiconductor Q1 automatic shutoffs
With for existing startup control circuit, the utility model will not be chronically at power-up state, reduce and power is disappeared
Consumption, meanwhile, also improve the service life of complete machine.
Simply the utility model preferred embodiment described above, is not limited to the utility model, all in this practicality
Modification, equivalent substitution or improvement made in new technical scope etc., should be included in the model that the utility model is protected
In enclosing.
Claims (4)
1. a kind of insert row with USB output interfaces, it is characterised in that include shell, the shell is provided with AC socket
And USB socket, the shell is interior to be provided with wiring board, and the wiring board is provided with：
One transformer, its input connection AC socket, for after the alternating voltage decompression transformation that inputs AC socket from defeated
Go out end output；
One EMI filter circuit, its input is connected to the output end of the transformer, for filtering out high-frequency impulse interference signal；
One rectification circuit, its input is connected to the output end of the EMI filter circuit, for being by the AC rectification of input
Exported after Rectified alternating current from output end；
One BOOST booster circuits, its input connects the output end of the rectification circuit, for by after input voltage boosting inverter
Export to USB socket；
One PWM generator, its input connects the output end of the rectification circuit, for output pulse width modulated signal to BOOST
The drive end of booster circuit, to drive BOOST booster circuits to export lasting DC voltage；
One starts control circuit, and the startup control circuit includes a rectifier bridge, and the DC output end of the rectifier bridge passes through
The first electric capacity, first resistor and the second capacity earth being sequentially connected in series, first resistor and the tie point of the second electric capacity also pass through one
Current-limiting resistance is connected to the drain electrode of a metal-oxide-semiconductor, and the tie point of first resistor and the second electric capacity is additionally coupled to the grid of metal-oxide-semiconductor, MOS
The source electrode of pipe is connected to the negative electrode of one first voltage-stabiliser tube, and the plus earth of the first voltage-stabiliser tube, the source electrode of metal-oxide-semiconductor is additionally coupled to one and continued
The anode of diode is flowed, the negative electrode of fly-wheel diode passes through one the 3rd capacity earth, the connection of fly-wheel diode and the 3rd electric capacity
Point is PWM power ends, and the PWM power ends are used to power for PWM generator, and the PWM power ends are additionally coupled to one the 1st pole
The negative electrode of pipe, the anode of first diode is grounded by the vice-side winding of transformer.
2. the insert row of USB output interfaces is carried as claimed in claim 1, it is characterised in that the first resistor and the second electricity
The tie point of appearance is additionally coupled to the negative electrode of one second voltage-stabiliser tube, the plus earth of second voltage-stabiliser tube.
3. the insert row of USB output interfaces is carried as claimed in claim 1, it is characterised in that the quantity of the AC socket is
It is multiple.
4. the insert row of USB output interfaces is carried as claimed in claim 3, it is characterised in that the shell is provided with groove, institute
State groove elongated, multiple AC sockets are divided into groove both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720202363.2U CN206471639U (en) | 2017-03-02 | 2017-03-02 | A kind of insert row with USB output interfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720202363.2U CN206471639U (en) | 2017-03-02 | 2017-03-02 | A kind of insert row with USB output interfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206471639U true CN206471639U (en) | 2017-09-05 |
Family
ID=59713141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720202363.2U Active CN206471639U (en) | 2017-03-02 | 2017-03-02 | A kind of insert row with USB output interfaces |
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| Country | Link |
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| CN (1) | CN206471639U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658596A (en) * | 2017-09-12 | 2018-02-02 | 安徽康力节能电器科技有限公司 | A kind of automatic shutoff socket |
-
2017
- 2017-03-02 CN CN201720202363.2U patent/CN206471639U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107658596A (en) * | 2017-09-12 | 2018-02-02 | 安徽康力节能电器科技有限公司 | A kind of automatic shutoff socket |
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