CN209105037U - A kind of multi-output switch power source - Google Patents
A kind of multi-output switch power source Download PDFInfo
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- CN209105037U CN209105037U CN201821809272.6U CN201821809272U CN209105037U CN 209105037 U CN209105037 U CN 209105037U CN 201821809272 U CN201821809272 U CN 201821809272U CN 209105037 U CN209105037 U CN 209105037U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model belongs to electronic circuit technology field, disclosing a kind of multi-output switch power source includes driving circuit, the driving circuit exports two parts of full-bridge inverting and voltage conversion circuit that impulse wave and four BJT are constituted by chip and constitutes, control chip and peripheral circuit and square wave generative circuit including PWM；Full-bridge circuit, the full-bridge circuit are made of four field-effect tube IRF730；Current rectifying and wave filtering circuit uses single phase full bridge controlled rectifier, and the single phase full bridge controlled rectifier is made of four diodes and capacitor.The utility model has miniaturization, a series of features such as integrated.
Description
Technical field
The utility model belongs to power electronics field more particularly to a kind of multi-output switch power source.
Background technique
Currently, the prior art commonly used in the trade is such that
Complicated electronic system now, the type of the supply voltage used is all very more, relatively conventional such as height
Piezoelectricity source level: 500KV, 300KV, 110KV, 60KV, 30KV etc., low-tension supply level+27V ,+24V ,+18V ,+15V ,+
12V ,+5V etc., these voltages are used not only for being used alone, and also usually need to be combined with different voltage, therefore power supply
The diversity of management is the growth momentum of the following power supply product, realizes that multiple-output electric power is the emphasis studied at present
Switching Power Supply achieves very quantum jump, and the appearance of the components such as metal-oxide-semiconductor IGBT allows Switching Power Supply to high frequency etc.
Direction high speed development.Especially flat surface transformer and planar inductor technology appearance so that the working efficiency of Switching Power Supply significantly
It is promoted, volume also significantly reduces.
In conclusion problem of the existing technology is:
(1) complicated design, the component used are more, cost price is very high and poor reliability.
Summary of the invention
In view of the problems of the existing technology, the utility model provides a kind of multi-output switch power source,
The utility model is realized in this way a kind of multi-output switch power source is provided with
Driving circuit, the driving circuit are exported the full-bridge inverting and voltage that impulse wave and four BJT are constituted by chip
Two parts of translation circuit are constituted, control chip and peripheral circuit and square wave generative circuit including PWM；
Full bridge circuit, the full-bridge circuit are made of four field-effect tube IRF730；
Current rectifying and wave filtering circuit uses single phase full bridge controlled rectifier, and the single phase full bridge controlled rectifier is by four two
Pole pipe and capacitor are constituted.
Further, the control chip of PWM is chip TL494.
Further, the chip reference voltage pin 14 of chip TL494 is connected by chip periphery circuit with pin 13.Pin 9
It is 6 ground resistance 8.6k of 6680p and pin with 10 output pin of pin, 5 ground capacity.Pin 8,9,10,11 is as internal output
Transistor collector and transmitter, pin 9,10 as both-end export, pin 8,11 input connection power supply.Pin 1,2,
15,16 compensation network is done for the voltage of internal error amplifier and the feedback access of pin 3.Two-way waveform carries out driving FET
Operation.The output waveform of TL494 circuit is codetermined by input voltage and its peripheral circuit.
Further, circuit and square-wave is that the two-way square wave exported from driving circuit pin 9 and pin 10 accesses full-bridge inverting electricity
Road.Full bridge inverter is made of four BJT power amplifiers, is two sc2389 and two sa1015 respectively.
Further, full-bridge circuit will be electric as the input of full-bridge circuit field-effect tube IRF730 from resulting direct current is rectified
Pressure, and the driving voltage from gained ac square wave above as two field-effect tube IRF730.Pass through the folding of field-effect tube
Output voltage wave, then passing through multichannel transformer for this convert alternating current is multiple-channel output.
Further, the rectification circuit uses 4148 diode, electric current 3A, and pressure resistance is 50V, selects in input rectifying
With 1 μ F capacitor, output uses 100 μ F capacitors.
In conclusion advantages of the present invention and good effect are as follows: design is simple, the component that uses is less, cost price
Low, unfailing performance has well miniaturization, a series of features such as integrated.
Detailed description of the invention
Fig. 1 is multi-output switch power source integrated circuit figure provided by the embodiment of the utility model；
Fig. 2 is TL494 material object and pinouts provided by the embodiment of the utility model；
Fig. 3 is TL494 and its peripheral circuit provided by the embodiment of the utility model；
Fig. 4 is square wave generative circuit figure provided by the embodiment of the utility model；
Fig. 5 is full bridge circuit figure provided by the embodiment of the utility model；
Fig. 6 is multipath rectification circuit figure provided by the embodiment of the utility model；
Specific embodiment
For the invention, features and effects that can further appreciate that the utility model, the following examples are hereby given, and cooperates
Detailed description are as follows for attached drawing.
As shown in Figures 1 to 6, multi-output switch power source provided by the embodiment of the utility model include: driving circuit, it is complete
Bridge circuit, current rectifying and wave filtering circuit.
Circuit is built using full-bridge type topological structure.And using chip TL494 as core, rectification circuit, PWM control are built
Circuit processed etc., to guarantee multiple-channel output.In design multiple-channel output part, detailed Jie has been carried out to devices such as rectifier diodes
It continues, and selects the parameter and material of most suitable circuit design.
Driving circuit uses the pin 9 of chip TL494 and pin 10 to export two-way waveform as shown in Figure 3 and Figure 4 and is driven
Dynamic field-effect tube operation.The output waveform of TL494 circuit is codetermined by input voltage and its peripheral circuit.The output of TL494
Waveform has monofocal and double-end type, as long as this mode is determined by pin 13.It is single-ended defeated when the voltage of pin 13 is 0V
Out；When voltage is 5V, exported for both-end；So chip reference voltage pin 14 is allowed to be connected in this circuit with pin 13.Core
Frequency of oscillation inside piece determines by pin 5 and pin 6, checks that data and design requirement use 20kHz herein, therefore pin 5
Ground capacity is 6 ground resistance 8.6k of 6680p and pin.Collector of the pin 8,9,10,11 as the transistor of inside output
And transmitter, pin 9,10 are exported as both-end, the input connection power supply of pin 8,11.Pin 1,2,15,16 is put for internal error
Big device and the voltage of the feedback access of pin 3 do compensation network.The two-way square wave exported from driving circuit pin 9 and pin 10 is connect
Enter full bridge inverter.Full bridge inverter is made of four BJT power amplifiers, is two sc2389 and two respectively
sa1015.Working principle be from the two-way square wave that driving circuit exports as triode operation voltage in full bridge inverter and
With the 15V voltage cooperation output 15V ac square wave of rectification output.And it is defeated by this ac square wave by transformer to be converted into two-way
Square wave provides the driving voltage of field-effect out.
Full-bridge circuit is as shown in Figure 5 using the full-bridge circuit being made of four field-effect tube IRF730.It will be obtained from rectifier
Direct current as full-bridge circuit field-effect tube IRF730 input voltage and gained ac square wave as two field-effect tube
The driving voltage of IRF730.This alternating current is become by the folding output voltage wave of field-effect tube, then by multichannel transformer
It is changed to multiple-channel output.
Rectification circuit uses bridge-type full-controlled rectifier as shown in Figure 6.
T1494 has a fixed frequency pulse modulation circuit in driving circuit, with an embedded linear saw-tooth wave
Oscillator, it is made of capacitor and resistance, and frequency of oscillation reaches as high as 500kHz by resistance and capacitance adjustment, maximum frequency.When 4
When foot institute's making alive increases, the time in dead zone is bigger, and duty ratio is with regard to smaller.The comparison procedure of PWM is error amplifier and 3 feet
Input is compared.
The working principle of the bridge rectifier of rectification circuit is: when for positive half cycle, to D1D3Add forward voltage, D2D4The side of adding
To voltage, D at this time1D3D is connected2D4Cut-off.In negative half period, D2D4Add forward voltage, D1D3Add direction voltage, at this time D2D4It leads
Logical D1D3Cut-off.Such repetitive operation can provide full-wave rectified voltage on a resistor.
Full-bridge type transformer switch power work principle and semibridge system are similar, and volume all very littles, output power is very big, work
The efficiency of work is very high, and the pressure voltage of switching tube is particularly low.The utilization rate of power supply is especially low, especially bright for low-voltage circuit
It is aobvious.Full bridge circuit does not allow to be also easy to produce cascading water, and half bridge circuit is easy to rush down and has electric current that waveform is made to degenerate, and generates interference.Half-bridge
Formula circuit cost is lower than full bridge circuit.
The above is only the preferred embodiment to the utility model, is not made in any form to the utility model
Limitation, it is all according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with
Modification, is all within the scope of the technical scheme of the utility model.
Claims (6)
1. a kind of multi-output switch power source, which is characterized in that a kind of multi-output switch power source includes:
Driving circuit, the driving circuit are exported the full-bridge inverting and voltage transformation that impulse wave and four BJT are constituted by chip
Two parts of circuit are constituted, control chip and peripheral circuit and square wave generative circuit including PWM；
Full-bridge circuit, the full-bridge circuit are made of four field-effect tube IRF730；
Current rectifying and wave filtering circuit uses single phase full bridge controlled rectifier, and the single phase full bridge controlled rectifier is by four diodes
It is constituted with capacitor.
2. a kind of multi-output switch power source as described in claim 1, which is characterized in that the control chip of the PWM is chip
TL494。
3. a kind of multi-output switch power source as described in claim 1, which is characterized in that the chip periphery circuit, by chip
The chip reference voltage pin 14 of TL494 is connected with pin 13；Pin 9 and 10 output pin of pin, 5 ground capacity be 6680p and
6 ground resistance 8.6k of pin；Collector and transmitter of the pin 8,9,10,11 as the transistor of inside output, pin 9,10
It is exported as both-end, the input connection power supply of pin 8,11；Pin 1,2,15,16 is that internal error amplifier and the feedback of pin 3 connect
The voltage entered does compensation network；Two-way waveform carries out driving FET operation；The output waveform of TL494 circuit is by input voltage
And its peripheral circuit codetermines.
4. a kind of multi-output switch power source as described in claim 1, which is characterized in that the square wave generative circuit is from driving
The two-way square wave that circuit pin 9 and pin 10 export accesses full bridge inverter；Full bridge inverter is by four BJT power amplifications
Device is constituted, and is two sc2389 and two sa1015 respectively.
5. a kind of multi-output switch power source as described in claim 1, which is characterized in that the full-bridge circuit will be obtained from rectifier
Input voltage of the direct current as full-bridge circuit field-effect tube IRF730, and from gained ac square wave above as two fields
The driving voltage of effect pipe IRF730；This is handed over by the folding output voltage wave of field-effect tube, then by multichannel transformer
Galvanic electricity is transformed to multiple-channel output.
6. a kind of multi-output switch power source as described in claim 1, which is characterized in that the rectification circuit uses the two of 4148
Pole pipe, electric current 3A, pressure resistance are 50V, and 1 μ F capacitor is selected in input rectifying, and output uses 100uF capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821809272.6U CN209105037U (en) | 2018-10-25 | 2018-10-25 | A kind of multi-output switch power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821809272.6U CN209105037U (en) | 2018-10-25 | 2018-10-25 | A kind of multi-output switch power source |
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| Publication Number | Publication Date |
|---|---|
| CN209105037U true CN209105037U (en) | 2019-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821809272.6U Expired - Fee Related CN209105037U (en) | 2018-10-25 | 2018-10-25 | A kind of multi-output switch power source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417271A (en) * | 2019-07-24 | 2019-11-05 | 珠海银河耐吉科技股份有限公司 | A kind of photovoltaic DC-to-AC converter driving circuit |
-
2018
- 2018-10-25 CN CN201821809272.6U patent/CN209105037U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110417271A (en) * | 2019-07-24 | 2019-11-05 | 珠海银河耐吉科技股份有限公司 | A kind of photovoltaic DC-to-AC converter driving circuit |
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| GR01 | Patent grant | ||
| 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: 20190712 Termination date: 20201025 |