CN2313330Y - Switch type and regulation type dc. voltage-stabilized source - Google Patents
Switch type and regulation type dc. voltage-stabilized source Download PDFInfo
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- CN2313330Y CN2313330Y CN 97231741 CN97231741U CN2313330Y CN 2313330 Y CN2313330 Y CN 2313330Y CN 97231741 CN97231741 CN 97231741 CN 97231741 U CN97231741 U CN 97231741U CN 2313330 Y CN2313330 Y CN 2313330Y
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- power supply
- circuit
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- transformer
- switch
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Abstract
The utility model belongs to an applied power supply for a computer. The utility model has the circuit structure that the power supply is composed of a switching power supply used for a host computer CPU, a memory, display and printing and a driver, a DC adjustable voltage-stabilized power supply supplied for detection or sampling, and an adjustable DC voltage-stabilized power supply supplied for A/D and D/A templates, wherein, the voltage of the switching power supply comprises +5V, 12V,-5V and-12V; the voltage of the DC adjustable voltage-stabilized power supply is +5V. The circuit is additionally provided with a control loop which is provided with a single device TL494C, and the circuit is additionally provided with a protective circuit simultaneously. The whole power supply circuit is a complete special power supply for the computer. The utility model has the advantages of reasonable design of the circuit, compact structure, small size, less power consumption, wide, continuous and adjustable operating ranges, high precision and stable and reliable operation.
Description
The utility model belongs to a kind of computer application power supply.
At present, the DC power supply that computer and various electronic instrument adopted is civil power and obtains through rectification, filtering, voltage stabilizing, this kind power supply architecture is simple, voltage is adjustable continuously, its deficiency is a poor anti jamming capability, and the DC power supply instability is influenced by the external power grid power-supply fluctuation easily, for the high accuracy of some A/D converters, the inaccessible specification requirement of the demanding device of DC power supply.
For solving the deficiency of above circuit construction of electric power, the purpose of this utility model provides a kind of switching regulator and adjustable D.C. regulated power supply, utilizes switching circuit to combine with conditioned circuit, little to reach power loss, the precision height, the pressurizer volume is little, working range is wide, continuously adjustable purpose.
Circuit structure of the present utility model is achieved in that its circuit structure by the Switching Power Supply of supplying with host CPU, memory, demonstration printing, driver use, has+5V/5A, 12V/1A, and-5V/0.5A reaches-12V/0.5A; For the direct current adjustable stabilized voltage supply that detects or sample be+5V/0.5A: supply with A/D, adjustable D.C. regulated power supply three parts of D/A template are formed.The circuit detailed structure is that the input circuit of Switching Power Supply is by L
o, C
1, L
1, C
2, C
3, C
4Form (as shown in Figure 1), two-way is serially connected with inductance respectively before switch, and two-way also is serially connected with inductance respectively after switch, on this inductance and capacitor C arranged
1, after the inductance and be connected to capacitor C
3, C
4, C
2, wherein one being serially connected with responsive to temperature in mutually and not having part TH1, its output is joined with the bridge rectifier input, is D below
1, D
2, D
3, D
4Diode, capacitor C
5, C
6, resistance R
1, R
2Form full-wave rectification, partial pressure filter circuit, wherein K switch
1Be alternating current 220V and 110V change over switch, the output of switching circuit and power switch circuit Q
1Q
2, D
5D
6Join filtering serial connection capacitor C
5, C
6Mid point is drawn through C
9Be concatenated into transformer T
2Former end, T
2The primary winding other end is concatenated into transformer T
1Two pay the limit windings, wherein two winding intermediate ends are respectively through diode, circuit and triode Q
1, Q
2Base stage is joined, and the top of winding is respectively through electric capacity, resistance and triode Q
1, Q
2Collector electrode join, the other end of paying winding respectively with Q
1, Q
2Expelling plate joins, and this circuit output is to convert direct current to staircase waveform, with transformer T
1Simple joining is control circuit, and this circuit is mainly by a switch integrated regulated power supply controll block TL494C and power tube Q
3, Q
4, driving transformer T
1Simple composition, output 8 pin of TL494C, 11 pin phase difference outputs are 180 ° square wave, output is connected to triode Q through electric resistance partial pressure respectively
3, Q
4Base stage, two or three utmost point pipe collector of anti-phase serial connection respectively with transformer T
1The primary winding two ends join, and phase difference output is that 180 ° square wave is through power tube Q
3, Q
4With driving transformer T
1Driving switch pipe Q again
1, Q
2, the output of DC power supply is by transformer network T
2Form transformer T
2Secondary 3,4,5,6 ends are through SC6 drag flow and L
2-2, L
2-3, C
28, C
29Filtering obtains+5V output.
Transformer T
2Secondary 3,4,5,6 ends are through D
17, D
16Drag flow and L
2-1, L
4, C
31Filtering obtains-5V output.
Transformer T
2Secondary 8,9 ends are through D
21, D
22Drag flow and L
2-4, L
3, C
30Filtering obtains+12V output.
Transformer T
2Secondary 8,9 ends are through D
19, D
20Drag flow and L
2-5, L
5, C
32Filtering obtains-12V output.
Accessory power supply is by T
2Transformer secondary output 7,8 is through D
21, D
22Drag flow is again through R
22, D
25Power to TL494C;
Protective circuit by+5V ,-12V passes through Q
5, Q
6, D
14And IC
2(LM393) form protective circuit, wherein IC
2Composed in series by dual-stage amplifier ,+5V is connected to through resistance and amplifies IC
2-1, IC
2-2One of input, amplifier IC
2-2Output feed back to IC
2-1Another input, amplifier IC
2-2Another input and transformer T
2Pay winding and join amplifier IC through diode
2-1Output directly be connected to 14,15 inputs of TLA94C through resistance.
The adjustable D.C. regulated power supply of ± 15V (as shown in Figure 3) is by variable-frequency transformer T
2Secondary, through D
3, D
4Drag flow and C
6Filtering is by IC
2(LM317) after the voltage stabilizing, can obtain adjustable+15V DC power supply at output, equally through transformer secondary output through D
7, D
8Drag flow and C
11Filtering is by IC
3(LM337) after the voltage stabilizing, can obtain at output-the 15V DC power supply.
The advantage of the utility model: circuit design is reasonable, compact conformation, and volume is little, and power consumption is little, the precision height, working range is wide, and is adjustable continuously, stable and reliable operation.
The circuit structure of the utility model is provided by following examples and accompanying drawing.
Fig. 1 is switching regulator and adjustable D.C. regulated power supply electrical schematic diagram;
Fig. 2 is switching regulator and adjustable D.C. regulated power supply+5V electrical schematic diagram;
Fig. 3 is switching regulator and adjustable D.C. regulated power supply ± 15V electrical schematic diagram.
Its circuit as shown in Figure 1, its operation principle: by L
o, C
1, L
1, C
2, C
3, C
4Form low pass filter, its effect is the extraneous High-frequency Interference that suppresses on the electrical network, and unaffected to guarantee machine, the High-frequency Interference that Switching Power Supply itself is produced suppresses simultaneously, in order to avoid pollute electrical network.C
1L
1C
2Form the anti-interference loop of norm, L
1C
3C
4Form the common mode disturbances loop, the inhibition to various radio frequency interference has good effect like this.
TH
1Be temperature-sensing element (device), its cold resistance is very big, and thermal resistance is less, and when circuit was connected, Q was worked as in the startup of restricting circuits
1Base stage when obtaining drive current, Q
1Conducting, C
5Through Q
1The C-E utmost point, transformer T
2Simple, C
9Discharge, be coupled by transformer T2 and send energy to inferior limit.Q
1Have no progeny in the pass, Q
2Base stage obtain drive current and make Q
2Conducting, C
6Through C
9, T
2Simple, Q
2C-E utmost point discharge, pass through transformer T equally
2Secondary energy is given in coupling.For fear of Q
1, Q
2Common ON time is arranged and power supply direct short-circuit is caused Q
1, Q
2Damage, must guarantee Q
1, Q
2The base drive pulse one common deadline, i.e. " dead band " time of control impuls was arranged.
Control loop mainly is by a switch integrated regulated power supply controll block TL94C and power tube Q
3, Q
4, driving transformer T
1And related elements is formed.
TL494 adopts the single power supply power supply, and 12 pin meet power supply V
Cc, 7 pin ground connection, reference voltage+5V is exported by 14 pin, and except that error amplifier, used internal electrical portion supplies with R by it
18, C
11Be connected on 6 pin and 5 pin respectively, can produce sawtooth waveforms self-oscillation, 1 pin, 2 pin connect error amplifier I homophase and end of oppisite phase respectively, 16 pin, 15 pin connect the homophase and the end of oppisite phase of error amplifier II respectively, 3 pin are the phase compensation end, 4 pin are the dead band control end of comparator 1, and 8 pin, 11 pin phase difference outputs are 180 ° square wave.When output voltage was high, pulse duration narrowed down, and when output voltage was low, pulsewidth broadened, thereby makes output voltage stabilization;
Protective circuit :+5V ,-12V passes through Q
5, Q
6, D
14On 4 pin of related elements to TL494, and IC
2(LM393) form protective circuit;
+ 12V is through IC
1(LM317) after the voltage stabilizing, can obtain adjustable D.C. regulated power supply, C at output
1Be input capacitance, C
3Be output capacitance, its effect is to be used for improving IC
1(LM317) transient response characteristic of output voltage, wherein variable potentiometer RW
1Be used for aligning the output voltage of LM317, and output voltage just depends on resistance R
2With potentiometer RW
1Ratio, wherein diode only is used to prevent when the power supply power failure because the output capacitance C of LM317
3Make the impaired protection diode of LM317 by the LM317 back discharge.
Claims (3)
1. a switching regulator and adjustable D.C. regulated power supply is characterized in that this circuit construction of electric power by the Switching Power Supply of supplying with host CPU, memory, demonstration printing, driver use, has+5V/5A, 12V/1A, and-5V/0.5A reaches-12V/0.5A; For the direct current adjustable stabilized voltage supply that detects or sample be+5V/0.5A; Supply with A/D, adjustable D.C. regulated power supply three parts of D/A template are formed.The circuit detailed structure is that the input circuit of Switching Power Supply is by L
0, C
1, L
1, C
2, C
3, C
4Form, two-way is serially connected with inductance respectively before switch, and two-way also is serially connected with inductance respectively after switch, on this inductance and capacitor C arranged
1, after the inductance and be connected to capacitor C
3, C
4, C
2, wherein one being serially connected with responsive to temperature in mutually and not having part TH1, its output is joined with the bridge rectifier input, is D below
1, D
2, D
3, D
4Diode, capacitor C
5, C
6, resistance R
1, R
2Form full-wave rectification, partial pressure filter circuit, wherein K switch
1Be alternating current 220V and 110V change over switch, the output of switching circuit and power switch circuit Q
1Q
2, D
5D
6Join filtering serial connection capacitor C
5, C
6Mid point is drawn through C
9Be concatenated into transformer T
2Former end, T
2The primary winding other end is concatenated into transformer T
1Two pay the limit windings, wherein two winding intermediate ends are respectively through diode, circuit and triode Q
1, Q
2Base stage is joined, and the top of winding is respectively through electric capacity, resistance and triode Q
1, Q
2Collector electrode join, the other end of paying winding respectively with Q
1, Q
2Expelling plate joins, and this circuit output is to convert direct current to staircase waveform, with transformer T
1Simple joining is control circuit, and this circuit is mainly by a switch integrated regulated power supply controll block TLA94C and power tube Q
3, Q
4, driving transformer T
1Simple composition, output 8 pin of TLA94C, 11 pin phase difference outputs are 180 ° square wave, output is connected to triode Q through electric resistance partial pressure respectively
3, Q
4Base stage, two or three utmost point pipe collector of anti-phase serial connection respectively with transformer T
1The primary winding two ends join, and phase difference output is that 180 ° square wave is through power tube Q
3, Q
4With driving transformer T
1Driving switch pipe Q again
1, Q
2
2. by the described D.C. regulated power supply of claim 1, the output that it is characterized in that DC power supply is by transformer network T
2Form transformer T
2Secondary 3,4,5,6 ends are through SC6 drag flow and L
2-2, L
2-3, C
28, C
29Filtering obtains+5V output;
Transformer T
2Secondary 3,4,5,6 ends are through D
17, D
18Drag flow and L
2-1, L
4, C
31Filtering obtains-5V output;
Transformer T
2Secondary 8,9 ends are through D
21, D
22Drag flow and L
2-4, L
3, C
30Filtering obtains+12V output;
Transformer T
2Secondary 8,9 ends are through D
19, D
20Drag flow and L
2-5, L
5, C
32Filtering obtains-12V output;
Accessory power supply is by T
2Transformer secondary output 7,8 is through D
21, D
22Drag flow is again through R
22, D
25Power to TL494C.
3. by the described D.C. regulated power supply of claim 1, it is characterized in that protective circuit by+5V ,-12V passes through Q
5, Q
6, D
14And IC
2(LM393) form protective circuit, wherein IC
2Composed in series by dual-stage amplifier ,+5V is connected to through resistance and amplifies IC
2-1, IC
2-2One of input, amplifier IC
2-2Output feed back to IC
2-1Another input, amplifier IC
2-2Another input and transformer T
2Pay winding and join amplifier IC through diode
2-1Output directly be connected to 14,15 inputs of TL494C through resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231741 CN2313330Y (en) | 1997-12-26 | 1997-12-26 | Switch type and regulation type dc. voltage-stabilized source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97231741 CN2313330Y (en) | 1997-12-26 | 1997-12-26 | Switch type and regulation type dc. voltage-stabilized source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2313330Y true CN2313330Y (en) | 1999-04-07 |
Family
ID=33943880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97231741 Expired - Fee Related CN2313330Y (en) | 1997-12-26 | 1997-12-26 | Switch type and regulation type dc. voltage-stabilized source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2313330Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7110266B1 (en) | 1999-07-02 | 2006-09-19 | Advanced Energy Industries, Inc. | Multiple element rectification circuit |
| CN100399233C (en) * | 2002-07-23 | 2008-07-02 | 三星电子株式会社 | Method and device for controlling power source in electronic equipment using host machine |
| CN102081419A (en) * | 2010-10-28 | 2011-06-01 | 华南理工大学 | Automatic voltage regulating circuit and method for solar photovoltaic power generation system |
| CN106647903A (en) * | 2015-10-28 | 2017-05-10 | 上海新岸线电子技术有限公司 | Power supply method, system and device for DC stabilized power supply |
| CN109149930A (en) * | 2017-06-15 | 2019-01-04 | 法雷奥照明公司 | Pulsewidth modulation regulated power supply |
-
1997
- 1997-12-26 CN CN 97231741 patent/CN2313330Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7110266B1 (en) | 1999-07-02 | 2006-09-19 | Advanced Energy Industries, Inc. | Multiple element rectification circuit |
| CN100399233C (en) * | 2002-07-23 | 2008-07-02 | 三星电子株式会社 | Method and device for controlling power source in electronic equipment using host machine |
| CN102081419A (en) * | 2010-10-28 | 2011-06-01 | 华南理工大学 | Automatic voltage regulating circuit and method for solar photovoltaic power generation system |
| CN102081419B (en) * | 2010-10-28 | 2013-06-12 | 华南理工大学 | Automatic voltage regulating circuit and method for solar photovoltaic power generation system |
| CN106647903A (en) * | 2015-10-28 | 2017-05-10 | 上海新岸线电子技术有限公司 | Power supply method, system and device for DC stabilized power supply |
| CN109149930A (en) * | 2017-06-15 | 2019-01-04 | 法雷奥照明公司 | Pulsewidth modulation regulated power supply |
| CN109149930B (en) * | 2017-06-15 | 2021-04-16 | 法雷奥照明公司 | Pulse width modulation voltage-stabilized source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |