CN209233112U - A kind of digital camera power supply adaptor - Google Patents
A kind of digital camera power supply adaptor Download PDFInfo
- Publication number
- CN209233112U CN209233112U CN201822124057.9U CN201822124057U CN209233112U CN 209233112 U CN209233112 U CN 209233112U CN 201822124057 U CN201822124057 U CN 201822124057U CN 209233112 U CN209233112 U CN 209233112U
- Authority
- CN
- China
- Prior art keywords
- resistance
- parallel
- circuit
- diode
- common mode
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 64
- 230000005669 field effect Effects 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 18
- 101100100146 Candida albicans NTC1 gene Proteins 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of digital camera power supply adaptors, including input module, control module, transformer T1 and output module, the input terminal of input module accesses alternating current, one end of the primary coil of the input terminal and transformer T1 of the output end link control module of input module, the other end of control module connection transformer T1, the secondary coil of the input terminal connection transformer T1 of output module, the output end of output module connect load；Export mould includes the first rectification circuit fastly, the both ends of first rectification circuit are parallel with RC filter circuit, the output end of first rectification circuit is connected with the first filter circuit, first filter circuit includes the common mode inductance LF4 of connection in circuit, the both ends of common mode inductance LF4 are parallel with capacitor and inductor L1, and the other end of common mode inductance connects load.The utility model circuit structure is simple, and circuit overall power is high, and charging effect is good.
Description
Technical field
The utility model relates to digital camera technology fields, more particularly to a kind of digital camera power supply adaptor.
Background technique
With the raising of people's lives level, more and more people like travelling away from home or playing during idle time,
People carry out souvenir of taking pictures usually using digital camera during travelling or playing, and for electronic equipment, it gos out
Most important outside is exactly electricity.It takes pictures for a long time because digital camera will do it, power consumption can be very big, if gone out
It is preceding shorter without the charging time during sufficient electricity in time or travelling, it is more likely that cause next stroke that can not clap
According to.For existing digital camera power supply adaptor since anti-interference ability is general, the lower charging effect of power is poor, to cannot go out
Electricity quickly is supplemented to digital camera in front of the door, also cannot achieve the efficient charging in stroke in the short time.
Utility model content
The number that the purpose of this utility model is to provide a kind of circuit structures simply, strong antijamming capability, charging effect are good
Code camera power supply adapter.
A kind of technical solution of digital camera power supply adaptor disclosed by the utility model is:
A kind of digital camera power supply adaptor, including input module, control module, transformer T1 and output module, it is described
The input terminal of input module accesses alternating current, the output end of the input module connect the control module input terminal and the change
One end of the primary coil of depressor T1, the control module connect the other end of the transformer T1, the output module it is defeated
Enter the secondary coil that end connects the transformer T1, the output end of the output module connects load.
The output mould includes the first rectification circuit fastly, and the input terminal of first rectification circuit connects the transformer T1
Secondary coil, the both ends of first rectification circuit are parallel with RC filter circuit, and the output end of first rectification circuit connects
It is connected to the first filter circuit, first filter circuit includes the common mode inductance LF4 of connection in circuit, the common mode inductance
The both ends of LF4 are parallel with capacitor and inductor L1, are parallel between one end of the common mode inductance LF4 and first rectification circuit
Capacitor C7, capacitor C11 and resistance R9, are also parallel with light-emitting diodes between the common mode inductance LF4 and first rectification circuit
Pipe LED1, the cathode of the Light-emitting diode LED 1 are in series with resistance R13, and the other end of the common mode inductance connects load, institute
It states and is also parallel with capacitor C10 between common mode inductance and load.
Preferably, first rectification circuit includes that the first rectification parallel circuit and second rectify parallel circuit,
The first rectification parallel circuit includes the anode connection institute of diode D3 and diode D4, the diode D3 and diode D4
State the secondary coil of transformer T1, the cathode of the diode D3 and diode D4 are connected in parallel the defeated of first filter circuit
Enter end, the second rectification parallel circuit includes diode D6 and diode D7, the anode of the diode D6 and diode D7
The secondary coil of the transformer T1 is connected, the diode D6 connects first filter circuit with the cathode of diode D7
Input terminal, the both ends of the second rectification parallel circuit are parallel with the RC filter circuit, and the RC filter circuit includes series connection
Resistance R14 and capacitor C9.
Preferably, the input module includes rectifier bridge BD1, and the input terminal of the rectifier bridge BD1 is connected with
Two filter circuits, the input terminal of second filter circuit access alternating current, the input terminal and alternating current of second filter circuit it
Between be connected with fuse F1 and thermistor NTC1, be also parallel between the input terminal and alternating current of second filter circuit pressure-sensitive
Resistance MOV1, the output end of the rectifier bridge BD1 connect the input terminal of the transformer T1 and the control module.
Preferably, second filter circuit includes common mode inductance LF1 and common mode inductance LF2, the common mode electricity
The one end for feeling LF1 connects alternating current, and the other end of the common mode inductance LF1 connects the common mode inductance LF2, the common mode inductance
The other end of LF2 connects the rectifier bridge BD1, is also parallel with electricity between the common mode inductance LF1 and the common mode inductance LF2
Hold CX1, resistance RX1 and resistance RX3, the resistance RX1 is in series with resistance RX2 and is connected in parallel on the common mode inductance LF1 and common mode electricity
Feel between LF2, the resistance RX3 is in series with resistance RX4 and is connected in parallel between the common mode inductance LF1 and common mode inductance LF2.
Preferably, the control module includes control chip U1, and the pin 3 of the control chip U1 connects institute
The output end of rectifier bridge BD1 is stated, is in series with resistance R4, electricity between the pin 3 and the rectifier bridge BD1 of the control chip U1
R16 and resistance R17 are hindered, is also parallel with capacitor C1 and capacitor between the pin 3 and the rectifier bridge BD1 of the control chip U1
The other end of C2, the capacitor C1 and capacitor C2 are grounded.
Preferably, the pin 4 of the control chip U1 is connected with field-effect tube Q1, the grid of the field-effect tube Q1
Pole connects the pin 4 of the control chip U1, goes here and there between the grid of the field-effect tube Q1 and the pin 4 of the control chip U1
It is associated with resistance R1, the both ends of the resistance R1 are parallel with diode D5, in parallel between the grid and source electrode of the field-effect tube Q1
There is resistance R2, the drain electrode of the field-effect tube Q1 connects the primary coil of the transformer T1, the source electrode of the field-effect tube Q1
It is in series with resistance R8, the other end ground connection of the resistance R8, the source electrode of the field-effect tube Q1 is also in series with resistance R3, the electricity
The other end of resistance R3 connects the pin 5 of the control chip U1, between the resistance R3 and the pin 5 of the control chip U1
It is parallel with capacitor C5.
Preferably, the pin 3 of the control chip U1 is also connected with start-up circuit, and the start-up circuit includes two
Pole pipe D1, the anode of the diode D1 connect the feedback coil of the transformer T1, and the cathode of the diode D1 is in series with
Resistance R15, the other end of resistance R15 connect the pin 3 of the control chip U1, the resistance R15 and the control chip U1
Pin 3 between be parallel with capacitor C3, the both ends of the diode D1 are parallel with capacitor C4.
Preferably, the pin 2 of the control chip U1 is connected with bleeder circuit, and the bleeder circuit includes series connection
Resistance R19 and resistance R20, the pin 2 of the control chip U1 is connected between the resistance R19 and resistance R20, described
The other end of resistance R20 is grounded, and the other end of the resistance R19 connects the feedback coil of the transformer T1.
Preferably, the output module further includes feed circuit, and the feed circuit includes optocoupler U2 and pressure stabilizing
Device U3, the collector of the phototriode of the optocoupler U2 connect the pin 6 of the control chip U1, the light of the optocoupler U2
It is parallel with zener diode ZD1 and capacitor C14 between the collector of quick triode and the pin 6 of the control chip U1, it is described
The emitter of the phototriode of optocoupler U2 is grounded, and the anode of the light emitting diode of the optocoupler U2 is in series with resistance R7, described
The other end of resistance R7 is connected to one end of the capacitor and inductor L1, described in the cathode connection of the light emitting diode of the optocoupler U2
The output end of voltage-stablizer U3, the input terminal of the voltage-stablizer U3 are connected to the other end of the capacitor and inductor L1.
Preferably, the input module further includes high pressure absorbing circuit, and the high pressure absorbing circuit includes two poles
Pipe D2, the anode of the diode D2 connects drain electrode and the primary coil of the transformer T1 of the field-effect tube Q1, described
The cathode of diode D2 is parallel with resistance R5, resistance R6 and capacitor C6, the resistance R5, resistance R6 and the other end of capacitor C6 connects
It connects between the rectifier bridge BD1 and the transformer T1.
The utility model provides a kind of digital camera power supply adaptor, and input module accesses alternating current, and high-voltage electricity is inputted into mistake
Become high voltage direct current after the rectifying and wave-filtering processing of module, high voltage direct current supply control module makes its start-up operation, controls mould
The switch of block control transformer T1.After control module control transformer T1 starts to work, the next high straightening of input module transmission
Galvanic electricity becomes low-voltage DC by transformer T1, the low-voltage DC of transformer T1 output will further by output module into
Row rectifying and wave-filtering.The low-voltage DC of transformer T1 output first passes around the first rectification circuit and is rectified, the first rectification circuit
The RC filter circuit of both ends parallel connection is filtered, and the low-voltage DC after completing first time rectifying and wave-filtering is using the first filter
Wave circuit is filtered again.First filter circuit includes common mode inductance LF4 and capacitor and inductor L1 in circuit in parallel, common mode
Also be parallel with capacitor C7, capacitor C11 and resistance R9 between one end of inductance LF4 and the first rectification circuit, common mode inductance it is another
It is also parallel with capacitor C10 between end and load, the integrated circuit strong antijamming capability of output module, filter effect is preferable, output
The output power high power consumption of module to load is low, and charging effect is more preferable.
Detailed description of the invention
Fig. 1 is a kind of electrical block diagram of digital camera power supply adaptor of the utility model.
Specific embodiment
The utility model is further elaborated and is illustrated with Figure of description combined with specific embodiments below:
Referring to FIG. 1, a kind of digital camera power supply adaptor, including input module 10, control module 20, transformer T1 and
Output module 30, the input terminal of the input module 10 access alternating current, and the output end of the input module 10 connects the control
One end of the primary coil of the input terminal of module 20 and the transformer T1, the control module 20 connect the transformer T1's
The other end, the input terminal of the output module 30 connect the secondary coil of the transformer T1, the output of the output module 30
End connection load.The model PQ2620 of the transformer T1, transformer T1 are a high frequency transformer, have close structure,
The characteristics of power is big, high reliablity.
The input module 10 includes rectifier bridge BD1, and the input terminal of the rectifier bridge BD1 is connected with the second filter circuit,
The input terminal of second filter circuit accesses alternating current, is connected with insurance between the input terminal and alternating current of second filter circuit
Silk F1 and thermistor NTC1, is also parallel with varistor MOV1, institute between the input terminal and alternating current of second filter circuit
The output end for stating rectifier bridge BD1 connects the input terminal of the transformer T1 and the control module 20.The model of rectifier bridge BD1
It is a bridge rectifier for KBL406, maximum RMS backward voltage is 560V.
Second filter circuit includes one end company of common mode inductance LF1 and common mode inductance LF2, the common mode inductance LF1
Alternating current is connect, the other end of the common mode inductance LF1 connects the common mode inductance LF2, the other end connection of the common mode inductance LF2
The rectifier bridge BD1, be also parallel between the common mode inductance LF1 and the common mode inductance LF2 capacitor CX1, resistance RX1 and
Resistance RX3, the resistance RX1 is in series with resistance RX2 and is connected in parallel between the common mode inductance LF1 and common mode inductance LF2, described
Resistance RX3 is in series with resistance RX4 and is connected in parallel between the common mode inductance LF1 and common mode inductance LF2.Second filter circuit it is whole
Body filter effect is preferable, first filter out the interference signal in the High Level AC Voltage of input be transferred to again rectifier bridge carry out rectification become
High voltage direct current.
The control module 20 includes control chip U1, controls the model LY6805 of chip U1.The control chip U1
Pin 3 connect the output end of the rectifier bridge BD1, gone here and there between the pin 3 and the rectifier bridge BD1 of the control chip U1
It is associated with resistance R4, resistance R16 and resistance R17, is also parallel between the pin 3 and the rectifier bridge BD1 of the control chip U1
The other end of capacitor C1 and capacitor C2, the capacitor C1 and capacitor C2 ground connection, high voltage direct current after over commutation further across
The filtering processing of capacitor C1 and capacitor C2.
The pin 4 of the control chip U1 is connected with field-effect tube Q1, and the grid of the field-effect tube Q1 connects the control
The pin 4 of coremaking piece U1 is in series with resistance R1 between the grid of the field-effect tube Q1 and the pin 4 of the control chip U1,
The both ends of the resistance R1 are parallel with diode D5, and resistance R2, institute are parallel between the grid and source electrode of the field-effect tube Q1
The drain electrode for stating field-effect tube Q1 connects the primary coil of the transformer T1, and the source series of the field-effect tube Q1 have resistance
The other end of R8, the resistance R8 are grounded, and the source electrode of the field-effect tube Q1 is also in series with resistance R3, and the resistance R3's is another
The pin 5 of the end connection control chip U1 is parallel with capacitor between the resistance R3 and the pin 5 of the control chip U1
C5.Diode D5 plays the role of protecting field-effect tube Q1, prevents control terminal output excessively high.The pin 5 of the control chip U1
For current acquisition pin.
The pin 3 of the control chip U1 is also connected with start-up circuit, and the start-up circuit includes diode D1, described
The anode of diode D1 connects the feedback coil of the transformer T1, and the cathode of the diode D1 is in series with resistance R15, resistance
The other end of R15 connects the pin 3 of the control chip U1, between the resistance R15 and the pin 3 of the control chip U1 simultaneously
It is associated with capacitor C3, the both ends of the diode D1 are parallel with capacitor C4.Resistance R15 is to adjust resistance, so as to adjust input
To the starting current of the control chip U1, capacitor C4 plays the role of filtering.
The pin 2 of the control chip U1 is connected with bleeder circuit, and the bleeder circuit includes concatenated resistance R19 and electricity
R20 is hindered, the pin 2 of the control chip U1 is connected between the resistance R19 and resistance R20, and the resistance R20's is another
End ground connection, the other end of the resistance R19 connect the feedback coil of the transformer T1.It is described control chip U1 pin 2 be
Demagnetization detects pin, carries out the lowest point detection by the feedback coil voltage to transformer and also can to realize quasi-resonance control
It realizes the detection of load end overvoltage protection, plays the role of overvoltage protection.
The input module 10 further includes high pressure absorbing circuit, and the high pressure absorbing circuit includes diode D2, and described two
The anode of pole pipe D2 connects drain electrode and the primary coil of the transformer T1 of the field-effect tube Q1, and the diode D2's is negative
Pole is parallel with resistance R5, resistance R6 and capacitor C6, the resistance R5, resistance R6 and the other end of capacitor C6 is connected to the rectification
Between bridge BD1 and the transformer T1.High-voltage pulse in the effective absorbing circuit of high pressure absorbing circuit energy.
The output module 30 includes the first rectification circuit, and the input terminal of first rectification circuit connects the transformer
The secondary coil of T1, the both ends of first rectification circuit are parallel with RC filter circuit, the output end of first rectification circuit
It is connected with the first filter circuit, first filter circuit includes the common mode inductance LF4 of connection in circuit, the common mode inductance
The both ends of LF4 are parallel with capacitor and inductor L1, are parallel with electricity between one end of the common mode inductance LF4 and first rectification circuit
Hold C7, capacitor C11 and resistance R9, is also parallel with light emitting diode between the common mode inductance LF4 and first rectification circuit
LED1, the cathode of the Light-emitting diode LED 1 are in series with resistance R13, and the other end of the common mode inductance connects load, described
Capacitor C10 is also parallel between common mode inductance and load.Entire first filter circuit strong antijamming capability, can effectively filter out electricity
Electromagnetic interference signal in road.
First rectification circuit includes the first rectification parallel circuit and the second rectification parallel circuit, and first rectification is simultaneously
Connection circuit includes that diode D3 and diode D4, the diode D3 connect time of the transformer T1 with the anode of diode D4
Grade coil, the cathode of the diode D3 and diode D4 are connected in parallel the input terminal of first filter circuit, and described second
Rectifying parallel circuit includes that diode D6 and diode D7, the diode D6 connect the transformation with the anode of diode D7
The secondary coil of device T1, the diode D6 connects the input terminal of first filter circuit with the cathode of diode D7, described
The both ends of second rectification parallel circuit are parallel with the RC filter circuit, the RC filter circuit include concatenated resistance R14 and
Capacitor C9.The diode D3, diode D4, diode D6 and diode D7 are Schottky barrier diodes.
The output module 30 further includes feed circuit, and the feed circuit includes optocoupler U2 and voltage-stablizer U3, the light
The collector of the phototriode of coupling U2 connects the pin 6 of the control chip U1, the collection of the phototriode of the optocoupler U2
It is parallel with zener diode ZD1 and capacitor C14 between electrode and the pin 6 of the control chip U1, the optocoupler U2's is photosensitive
The emitter of triode is grounded, and the anode of the light emitting diode of the optocoupler U2 is in series with resistance R7, and the resistance R7's is another
End is connected to one end of the capacitor and inductor L1, and the cathode of the light emitting diode of the optocoupler U2 connects the voltage-stablizer U3's
Output end, the input terminal of the voltage-stablizer U3 are connected to the other end of the capacitor and inductor L1.The model of optocoupler U2
The model TL431A of PC817C, voltage-stablizer U3.
The utility model provides a kind of digital camera power supply adaptor, and input module accesses alternating current, and high-voltage electricity is inputted into mistake
Become high voltage direct current after the rectifying and wave-filtering processing of module, high voltage direct current supply control module makes its start-up operation, controls mould
The switch of block control transformer T1.After control module control transformer T1 starts to work, the next high straightening of input module transmission
Galvanic electricity becomes low-voltage DC by transformer T1, the low-voltage DC of transformer T1 output will further by output module into
Row rectifying and wave-filtering.The low-voltage DC of transformer T1 output first passes around the first rectification circuit and is rectified, the first rectification circuit
The RC filter circuit of both ends parallel connection is filtered, and the low-voltage DC after completing first time rectifying and wave-filtering is using the first filter
Wave circuit is filtered again.First filter circuit includes common mode inductance LF4 and capacitor and inductor L1 in circuit in parallel, common mode
Also be parallel with capacitor C7, capacitor C11 and resistance R9 between one end of inductance LF4 and the first rectification circuit, common mode inductance it is another
Capacitor C10 is also parallel between end and load, and the integrated circuit strong antijamming capability of output module, filter effect is preferable.This reality
With the strong antijamming capability of novel input module and output module, and overall output power high power consumption is low, and charging effect is more preferable.
The utility model is suitable for the relatively high adapter of power requirement, for example 24V, 3.5A, power are up to the adapter of 60W.
Finally it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than to this reality
With the limitation of novel protected range, although being explained in detail referring to preferred embodiment to the utility model, this field it is general
Lead to it will be appreciated by the skilled person that can be with the technical solution of the present invention is modified or equivalently replaced, without departing from this
The spirit and scope of utility model technical solution.
Claims (10)
1. a kind of digital camera power supply adaptor, it is characterised in that: including input module, control module, transformer T1 and output
The input terminal of module, the input module accesses alternating current, and the output end of the input module connects the input of the control module
One end of the primary coil of end and the transformer T1, the control module connects the other end of the transformer T1, described defeated
The input terminal of module connects the secondary coil of the transformer T1 out, and the output end of the output module connects load；
The output mould includes the first rectification circuit fastly, and the input terminal of first rectification circuit connects time of the transformer T1
Grade coil, the both ends of first rectification circuit are parallel with RC filter circuit, and the output end of first rectification circuit is connected with
First filter circuit, first filter circuit include the common mode inductance LF4 of connection in circuit, the common mode inductance LF4's
Both ends are parallel with capacitor and inductor L1, be parallel between one end of the common mode inductance LF4 and first rectification circuit capacitor C7,
Capacitor C11 and resistance R9, is also parallel with Light-emitting diode LED 1 between the common mode inductance LF4 and first rectification circuit,
The cathode of the Light-emitting diode LED 1 is in series with resistance R13, and the other end of the common mode inductance connects load, the common mode electricity
Capacitor C10 is also parallel between sense and load.
2. a kind of digital camera power supply adaptor as described in claim 1, it is characterised in that: first rectification circuit includes
First rectification parallel circuit and the second rectification parallel circuit, the first rectification parallel circuit includes diode D3 and diode
D4, the diode D3 connect the secondary coil of the transformer T1, the diode D3 and two poles with the anode of diode D4
The cathode of pipe D4 is connected in parallel the input terminal of first filter circuit, the second rectification parallel circuit include diode D6 and
Diode D7, the diode D6 connect the secondary coil of the transformer T1, the diode D6 with the anode of diode D7
The input terminal of first filter circuit is connected with the cathode of diode D7, the both ends of the second rectification parallel circuit are parallel with
The RC filter circuit, the RC filter circuit include concatenated resistance R14 and capacitor C9.
3. a kind of digital camera power supply adaptor as described in claim 1, it is characterised in that: the input module includes rectification
Bridge BD1, the input terminal of the rectifier bridge BD1 are connected with the second filter circuit, and the input terminal of second filter circuit accesses city
Electricity is connected with fuse F1 and thermistor NTC1, second filter between the input terminal and alternating current of second filter circuit
Varistor MOV1 is also parallel between the input terminal and alternating current of wave circuit, the output end of the rectifier bridge BD1 connects the change
The input terminal of depressor T1 and the control module.
4. a kind of digital camera power supply adaptor as claimed in claim 3, it is characterised in that: second filter circuit includes
One end of common mode inductance LF1 and common mode inductance LF2, the common mode inductance LF1 connect alternating current, and the common mode inductance LF1's is another
End connects the common mode inductance LF2, and the other end of the common mode inductance LF2 connects the rectifier bridge BD1, the common mode inductance
It is also parallel with capacitor CX1, resistance RX1 between LF1 and the common mode inductance LF2 and resistance RX3, the resistance RX1 are in series with electricity
Resistance RX2 is connected in parallel between the common mode inductance LF1 and common mode inductance LF2, and the resistance RX3 is in series with resistance RX4 and is connected in parallel on institute
It states between common mode inductance LF1 and common mode inductance LF2.
5. a kind of digital camera power supply adaptor as claimed in claim 3, it is characterised in that: the control module includes control
The pin 3 of chip U1, the control chip U1 connect the output end of the rectifier bridge BD1,3 He of pin of the control chip U1
It is in series with resistance R4, resistance R16 and resistance R17 between the rectifier bridge BD1, the pin 3 of the control chip U1 and described whole
The other end ground connection of capacitor C1 and capacitor C2, the capacitor C1 and capacitor C2 are also parallel between stream bridge BD1.
6. a kind of digital camera power supply adaptor as claimed in claim 5, it is characterised in that: the pin of the control chip U1
4 are connected with field-effect tube Q1, and the grid of the field-effect tube Q1 connects the pin 4 of the control chip U1, the field-effect tube
It is in series with resistance R1 between the grid of Q1 and the pin 4 of the control chip U1, the both ends of the resistance R1 are parallel with diode
D5, is parallel with resistance R2 between the grid and source electrode of the field-effect tube Q1, the drain electrode of the field-effect tube Q1 connects the change
The primary coil of depressor T1, the source series of the field-effect tube Q1 have resistance R8, and the other end ground connection of the resistance R8 is described
The source electrode of field-effect tube Q1 is also in series with resistance R3, and the other end of the resistance R3 connects the pin 5 of the control chip U1, institute
It states and is parallel with capacitor C5 between resistance R3 and the pin 5 of the control chip U1.
7. a kind of digital camera power supply adaptor as claimed in claim 5, it is characterised in that: the pin of the control chip U1
3 are also connected with start-up circuit, and the start-up circuit includes diode D1, and the anode of the diode D1 connects the transformer T1
Feedback coil, the cathode of the diode D1 is in series with resistance R15, and the other end of resistance R15 connects the control chip U1
Pin 3, the resistance R15 and it is described control chip U1 pin 3 between be parallel with capacitor C3, the both ends of the diode D1
It is parallel with capacitor C4.
8. a kind of digital camera power supply adaptor as claimed in claim 5, it is characterised in that: the pin of the control chip U1
2 are connected with bleeder circuit, and the bleeder circuit includes concatenated resistance R19 and resistance R20, the pin 2 of the control chip U1
It is connected between the resistance R19 and resistance R20, the other end ground connection of the resistance R20, the other end of the resistance R19 connects
Connect the feedback coil of the transformer T1.
9. a kind of digital camera power supply adaptor as claimed in claim 5, it is characterised in that: the output module further includes anti-
Current feed circuit, the feed circuit include optocoupler U2 and voltage-stablizer U3, and the collector of the phototriode of the optocoupler U2 connects institute
The pin 6 of control chip U1 is stated, between the collector of the phototriode of the optocoupler U2 and the pin 6 of the control chip U1
It is parallel with zener diode ZD1 and capacitor C14, the emitter of the phototriode of the optocoupler U2 is grounded, the optocoupler U2's
The anode of light emitting diode is in series with resistance R7, and the other end of the resistance R7 is connected to one end of the capacitor and inductor L1, institute
The cathode for stating the light emitting diode of optocoupler U2 connects the output end of the voltage-stablizer U3, and the input terminal of the voltage-stablizer U3 is connected to
The other end of the capacitor and inductor L1.
10. a kind of digital camera power supply adaptor as claimed in claim 6, it is characterised in that: the input module further includes
High pressure absorbing circuit, the high pressure absorbing circuit include diode D2, and the anode of the diode D2 connects the field-effect tube
The drain electrode of Q1 and the primary coil of the transformer T1, the cathode of the diode D2 are parallel with resistance R5, resistance R6 and capacitor
The other end of C6, the resistance R5, resistance R6 and capacitor C6 are connected between the rectifier bridge BD1 and the transformer T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124057.9U CN209233112U (en) | 2018-12-18 | 2018-12-18 | A kind of digital camera power supply adaptor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822124057.9U CN209233112U (en) | 2018-12-18 | 2018-12-18 | A kind of digital camera power supply adaptor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209233112U true CN209233112U (en) | 2019-08-09 |
Family
ID=67508124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822124057.9U Expired - Fee Related CN209233112U (en) | 2018-12-18 | 2018-12-18 | A kind of digital camera power supply adaptor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209233112U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112019060A (en) * | 2020-08-28 | 2020-12-01 | 东莞市大忠电子有限公司 | Vehicle-mounted AC/DC quick-charging power adapter circuit |
| US11108224B1 (en) | 2020-06-05 | 2021-08-31 | Leader Electronics Inc. | Electric circuit structure for short circuit protection |
-
2018
- 2018-12-18 CN CN201822124057.9U patent/CN209233112U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11108224B1 (en) | 2020-06-05 | 2021-08-31 | Leader Electronics Inc. | Electric circuit structure for short circuit protection |
| EP3920353A1 (en) * | 2020-06-05 | 2021-12-08 | Leader Electronics Inc. | Improved electric circuit structure for short circuit protection |
| CN112019060A (en) * | 2020-08-28 | 2020-12-01 | 东莞市大忠电子有限公司 | Vehicle-mounted AC/DC quick-charging power adapter circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109068442B (en) | LED drive circuit compatible with electronic ballast and mains supply and LED lamp | |
| CN205029930U (en) | Stroboscopic LED driver is removed to wide voltage high efficiency of 9 -48V scope | |
| CN209627761U (en) | LED Drive Protecting Circuit | |
| CN209233112U (en) | A kind of digital camera power supply adaptor | |
| CN112421755A (en) | Power supply system for electric power monitoring based on Internet of things | |
| CN207782395U (en) | A kind of thermal-shutdown circuit and electronic equipment | |
| CN104426377B (en) | Wide-input voltage flyback-type switch power supply applicable to drive of direct-current motor | |
| CN205622952U (en) | DALI communication circuit and including lighting apparatus of this kind of circuit | |
| CN203632943U (en) | LED energy storage driving system with reusable AC-DC converter | |
| CN217427719U (en) | Multi-protocol quick charging circuit and device | |
| CN207947917U (en) | LED drive module, LED drive circuit and LED drive power | |
| CN209375469U (en) | A kind of electric vehicle adapter circuit | |
| CN109755923A (en) | A kind of protection circuit, the method and apparatus of power supply device | |
| CN206135521U (en) | High -speed monitoring system of commercial power of emergency lighting power | |
| CN210016412U (en) | GAN (gallium nitride) MOSFET ultra-thin power adapter | |
| CN211267181U (en) | LED lamp circuit with emergency lighting function | |
| CN205544882U (en) | But control front end network management set power | |
| CN112822820A (en) | LED down lamp drive controller | |
| CN106535396B (en) | A kind of jamproof constant current LED drive circuit | |
| CN209375468U (en) | Circuit for projector adapter | |
| CN104901280A (en) | Intelligent protection circuit | |
| CN108521698B (en) | Overvoltage protection self-recovery energy-saving LED driving power supply | |
| CN216390808U (en) | Constant voltage and constant current switch power supply | |
| CN217216365U (en) | Switching power supply and multifunctional electric meter with low standby power consumption | |
| CN112333880B (en) | Emergency lighting power supply circuit applied to LED lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190809 |