CN202364142U - Simple DC stabilized power supply - Google Patents
Simple DC stabilized power supply Download PDFInfo
- Publication number
- CN202364142U CN202364142U CN2011204723497U CN201120472349U CN202364142U CN 202364142 U CN202364142 U CN 202364142U CN 2011204723497 U CN2011204723497 U CN 2011204723497U CN 201120472349 U CN201120472349 U CN 201120472349U CN 202364142 U CN202364142 U CN 202364142U
- Authority
- CN
- China
- Prior art keywords
- operational amplifier
- positive
- voltage
- termination
- resistance
- 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
- Rectifiers (AREA)
Abstract
The utility model relates to a simple DC stabilized power supply which is characterized by comprising a transformer, a rectifier bridge, a voltage dependent resistor, a resistor, a capacitor, a diode, a voltage-regulator tube, a field effect tube and an operational amplifier. According to the utility model, the transformer is used for acquiring the energy, the rectifier bridge is used for rectifying, the voltage-regulator tube is used for acquiring reference voltage signals, the resistor is used for acquiring external voltage signals by means of resistance division, the operational amplifier is used for comparing the circuit, and the field effect tube is used for controlling on and off so as to realize the stable output of the DC power supply. As the electronic devices used are less, the structure is simple, the cost is lower and the space is saved, then the power supply occupies less space, the operation is stable, the consumed energy is low and the use efficiency of the power supply is effectively improved.
Description
Technical field
The utility model belongs to a kind of power circuit, particularly relates to a kind of easy D.C. regulated power supply.
Background technology
Along with extensively being applied in the various fields rapidly of electronic technology, electric equipment products are more and more general, become the main flow in the present various field gradually.Yet all electric equipment products all need be used power supply, and quite most electric elements needs DC power supply.Because the development trend of present electric equipment products is that so present electric equipment products product is more and more littler, function from strength to strength toward simplicity, integrated, intelligent, compact, low carbonization development.Yet the volume of the power unit of electrical appliance is big or small, the ease of structure, big limitations they succinct, small and exquisite developing direction.The utility model has just proposed a feasible way for this reason.
Summary of the invention
The utility model provides a kind of volume little for solving the technical problem that exists in the known technology, a kind of easy D.C. regulated power supply simple in structure.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: it includes transformer (T1), rectifier bridge (D1), piezo-resistance (R1); Second and third, four, five resistance (R2, R3, R4, R5); First, second, third and fourth electric capacity (C1, C2, C3, C4), second, five diodes (D2, D5), third and fourth voltage-stabiliser tube (D3, D4); FET (Q1), operational amplifier (U1);
The L of a side joint civil power of transformer (T1) gets energy with N mutually mutually, and two outputs of secondary side connect the ac input end of rectifier bridge (D1) respectively; The negative pole of negative output termination first electric capacity (C1) in the dc output end of rectifier bridge (D1) also meets GND, the positive pole of positive output termination first electric capacity (C1); Piezo-resistance (R1) is parallel to the two ends of first electric capacity (C1); The positive pole of second resistance (R2) termination first electric capacity (C1), the negative electrode of another termination the 3rd voltage-stabiliser tube (D3); Second diode (D2) anode connects the negative electrode of the 3rd voltage-stabiliser tube (D3), and the negative electrode of second diode (D2) connects the input of FET (Q1); The anode of the 3rd voltage-stabiliser tube (D3) meets GND, the output of the control termination operational amplifier (U1) of FET (Q1), the positive power source terminal of the output termination operational amplifier (U1) of FET (Q1); The negative supply of operational amplifier (U1) meets GND, and the negative input end of operational amplifier (U1) connects the negative electrode of the 4th voltage-stabiliser tube (D4), positive input termination fourth, fifth resistance (R4, public connecting end R5) of operational amplifier (U1); The positive pole of second electric capacity (C2) connects the positive power source terminal of operational amplifier (U1), and the negative pole of second electric capacity (C2) meets GND; The positive supply of the 3rd resistance (R3) termination operational amplifier (U1), the negative input end of another termination operational amplifier (U1); The anode of the 4th voltage-stabiliser tube (D4) meets GND, and negative electrode connects the negative input end of operational amplifier (U1); The positive supply of one termination operational amplifier (U1) of the 4th resistance (R4), the positive input terminal of another termination operational amplifier (U1); The positive input terminal of one termination operational amplifier (U1) of the 5th resistance (R5), another termination GND; The positive pole of the 5th diode (D5) connects the positive supply of operational amplifier (U1), and the negative pole of the 5th diode (D5) meets VCC; The positive pole of the 3rd electric capacity (C3) meets VCC, and negative pole meets GND; The 4th electric capacity (C4) is parallel to the 3rd electric capacity (C3) two ends.
Advantage and the good effect that the utlity model has are: because the electronic device that this power supply adopts is less, simple in structure, cost is lower; Save the space, make that the shared spatial volume of this power supply is little, working stability; The energy that self expends is low, effectively raises the utilization ratio of power supply.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model.
Embodiment
For further understanding summary of the invention, characteristics and the effect of the utility model, the following examples of giving an example now, and conjunction with figs. specifies as follows:
As shown in Figure 1, the utility model includes transformer T1, rectifier bridge D1, piezo-resistance R1, resistance R 2,3,4,5, capacitor C 1,2,3,4, diode D2,5, voltage-stabiliser tube D3,4, FET Q1, operational amplifier U1.The L of the side joint civil power of transformer T1 gets energy with N mutually mutually, and two outputs of secondary side connect the ac input end of rectifier bridge D1 respectively; The negative pole of the negative output termination capacitor C 1 in the dc output end of rectifier bridge D1 also meets GND, the positive pole of positive output termination capacitor C 1; Piezo-resistance R1 is parallel to the two ends of capacitor C 1; The positive pole of resistance R 2 one termination capacitor C1, the negative electrode of another termination voltage-stabiliser tube D3; Diode D2 anode connects the negative electrode of voltage-stabiliser tube D3, and the negative electrode of diode D2 connects the input of FET Q1; The anode of voltage-stabiliser tube D3 meets GND, the output of the control termination operational amplifier U1 of FET Q1, the positive power source terminal of the output termination operational amplifier U1 of FET Q1; The negative supply of operational amplifier U1 meets GND, and the negative input end of operational amplifier U1 connects the negative electrode of voltage-stabiliser tube D4, the positive input terminal connecting resistance R4 of operational amplifier U1, the public connecting end of R5; The positive power source terminal of one termination operational amplifier U1 of capacitor C 2, another termination GND of capacitor C 2; The positive supply of resistance R 3 one termination operational amplifier U1, the negative input end of another termination operational amplifier U1; The anode of voltage-stabiliser tube D4 meets GND, and negative electrode connects the negative input end of operational amplifier U1; The positive supply of one termination operational amplifier U1 of resistance R 4, the positive input terminal of another termination operational amplifier U1; The positive input terminal of one termination operational amplifier U1 of resistance R 5, another termination GND; The positive pole of diode D5 connects the positive supply of operational amplifier U1, and the negative pole of diode D5 meets VCC; The positive pole of capacitor C 3 meets VCC, and negative pole meets GND; Capacitor C 4 is parallel to capacitor C 3 two ends.
As shown in Figure 1, the primary side of transformer T1 is received L, N go up mutually power taking can, the lead-out wire of secondary side is received on the rectifier bridge D1, after the rectification through capacitor C 1, piezo-resistance R1, voltage-stabiliser tube D3, diode D2 arrives the input of FET Q1; The on state characteristic of FET Q1 is: conducting when control pin is low level; This moment FET Q1 the rear end no-voltage, electric current flows through FET Q1, makes the element of FET Q1 back obtain electric energy; Electric energy produces the negative input end that a stable voltage signal is given operational amplifier U1 through resistance R 3 at the negative electrode of voltage-stabiliser tube D4; Electric energy is through resistance R 4, and R5 in resistance R 4, produces the positive input terminal that a voltage signal of following resistance R 4 upper end change in voltage and changing is given operational amplifier U1 between the R5; Size according to these two signals compares, and conducting and the shutoff of the output control FET Q1 of operational amplifier U1 make that the voltage between the capacitor C 2 maintains on the metastable value.When the voltage at capacitor C 2 two ends was higher than design load, the positive input terminal signal of operational amplifier U1 was higher than the negative input end signal of operational amplifier U1, the output output high level of operational amplifier U1, and FET Q1 turn-offs, and voltage reduces; When the voltage at capacitor C 2 two ends was lower than design load, the positive input terminal signal of operational amplifier U1 was lower than the negative input end signal of operational amplifier U1, the output output low level of operational amplifier U1, and FET Q1 conducting, voltage raises; Capacitor C 2 makes that the change frequency of voltage can be too not high, within the reaction time of FET Q1 and operational amplifier U1.Behind the voltage process diode D5 at capacitor C 2 two ends, after the voltage drop low value is the PN joint conducting voltage of diode D5, behind the voltage regulation filtering through capacitor C 3 and C4, offers galvanic current of electrical appliance and press.Resistance R 3, R4, the setting output voltage values that the size of R5 and voltage-stabiliser tube D4 and characteristic have determined this power supply; Because when voltage was higher than use value, FET Q1 turn-offed, power remove makes the utilization rate of electric energy improve greatly.
Claims (1)
1. easy D.C. regulated power supply, it is characterized in that: it includes transformer (T1), rectifier bridge (D1); Piezo-resistance (R1), second and third, four, five resistance (R2, R3, R4, R5), first, second, third and fourth electric capacity (C1, C2, C3, C4); The second, five diodes (D2, D5); Third and fourth voltage-stabiliser tube (D3, D4), FET (Q1), operational amplifier (U1); The L of a side joint civil power of transformer (T1) gets energy with N mutually mutually, and two outputs of secondary side connect the ac input end of rectifier bridge (D1) respectively; The negative pole of negative output termination first electric capacity (C1) in the dc output end of rectifier bridge (D1) also meets GND, the positive pole of positive output termination first electric capacity (C1); Piezo-resistance (R1) is parallel to the two ends of first electric capacity (C1); The positive pole of second resistance (R2) termination first electric capacity (C1), the negative electrode of another termination the 3rd voltage-stabiliser tube (D3); Second diode (D2) anode connects the negative electrode of the 3rd voltage-stabiliser tube (D3), and the negative electrode of second diode (D2) connects the input of FET (Q1); The anode of the 3rd voltage-stabiliser tube (D3) meets GND, the output of the control termination operational amplifier (U1) of FET (Q1), the positive power source terminal of the output termination operational amplifier (U1) of FET (Q1); The negative supply of operational amplifier (U1) meets GND, and the negative input end of operational amplifier (U1) connects the negative electrode of the 4th voltage-stabiliser tube (D4), positive input termination fourth, fifth resistance (R4, public connecting end R5) of operational amplifier (U1); The positive pole of second electric capacity (C2) connects the positive power source terminal of operational amplifier (U1), and the negative pole of second electric capacity (C2) meets GND; The positive supply of the 3rd resistance (R3) termination operational amplifier (U1), the negative input end of another termination operational amplifier (U1); The anode of the 4th voltage-stabiliser tube (D4) meets GND, and negative electrode connects the negative input end of operational amplifier (U1); The positive supply of one termination operational amplifier (U1) of the 4th resistance (R4), the positive input terminal of another termination operational amplifier (U1); The positive input terminal of one termination operational amplifier (U1) of the 5th resistance (R5), another termination GND; The positive pole of the 5th diode (D5) connects the positive supply of operational amplifier (U1), and the negative pole of the 5th diode (D5) meets VCC; The positive pole of the 3rd electric capacity (C3) meets VCC, and negative pole meets GND; The 4th electric capacity (C4) is parallel to the 3rd electric capacity (C3) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204723497U CN202364142U (en) | 2011-11-24 | 2011-11-24 | Simple DC stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204723497U CN202364142U (en) | 2011-11-24 | 2011-11-24 | Simple DC stabilized power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202364142U true CN202364142U (en) | 2012-08-01 |
Family
ID=46575297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204723497U Expired - Fee Related CN202364142U (en) | 2011-11-24 | 2011-11-24 | Simple DC stabilized power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202364142U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186477A (en) * | 2015-09-24 | 2015-12-23 | 湖南劲阳电子有限公司 | Overvoltage and overcurrent protection circuit |
-
2011
- 2011-11-24 CN CN2011204723497U patent/CN202364142U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186477A (en) * | 2015-09-24 | 2015-12-23 | 湖南劲阳电子有限公司 | Overvoltage and overcurrent protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205029559U (en) | Power switching circuit | |
| CN204131210U (en) | Power supply switch circuit and portable electric appts | |
| CN101873068A (en) | General integration technology for realizing high efficiency of linear power supply | |
| CN103633839A (en) | Improved Z-source boosting DC (direct current)-DC converter | |
| CN101562403B (en) | Single-phase electronic type electric energy meter electric source | |
| CN203883673U (en) | Improved Z-source boost DC-DC converter | |
| CN205319941U (en) | Double - circuit voltage conversion control chip , double - circuit voltage conversion ware and electronic electric energy meter | |
| CN202997919U (en) | Ripple suppression circuit and power supply system thereof | |
| CN102299629A (en) | Power supply control method and power supply device for direct-current high-voltage power supply | |
| CN202565159U (en) | PFC control circuit capable of boosting flexibly | |
| CN202364142U (en) | Simple DC stabilized power supply | |
| CN202737505U (en) | Boost charging circuit of storage battery | |
| WO2017031694A1 (en) | Power supply of single-phase electronic electric energy meter | |
| CN204721240U (en) | Switching power supply circuit | |
| CN204104190U (en) | LED drive power and LED display | |
| CN208675108U (en) | It is a kind of to be depressured the direct-current switch power supply conversion circuit that boosted | |
| CN103857101A (en) | Drive circuit and lamp fixture | |
| CN202975087U (en) | Power supply circuit module for intelligent electric meter | |
| CN105406711A (en) | Two-way voltage conversion control chip, two-way voltage converter and electronic watt-hour meter | |
| CN106992698B (en) | Module power supply circuit with dual mode | |
| CN202586772U (en) | Switching power supply | |
| CN202135070U (en) | Dual-voltage capacitance-resistance voltage-reduction energy saving circuit | |
| CN206389283U (en) | A kind of power circuit of simple low-power high voltage output | |
| CN101404455B (en) | Three terminal type power switch power supply circuit | |
| CN202798461U (en) | Application circuit of switching power supply control chip |
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: 20120801 Termination date: 20171124 |