CN204517680U - A kind of interchange inputs doubleway output DC-stabilized circuit - Google Patents
A kind of interchange inputs doubleway output DC-stabilized circuit Download PDFInfo
- Publication number
- CN204517680U CN204517680U CN201520210749.9U CN201520210749U CN204517680U CN 204517680 U CN204517680 U CN 204517680U CN 201520210749 U CN201520210749 U CN 201520210749U CN 204517680 U CN204517680 U CN 204517680U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- connects
- wave filtering
- diode
- 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
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of interchange and input doubleway output DC-stabilized circuit, the high frequency transformer comprising electromagnetic interface filter, the rectification circuit connected with the output of electromagnetic interface filter and connect with the output of rectification circuit, and the first DC voltage output circuit and the second DC voltage output circuit; High frequency transformer be the high frequency transformer T1 with two groups of primary coils and two groups of secondary coils, high frequency transformer T1 first group of secondary coil two ends between be connected to leakage inductance peak absorbing circuit; First current rectifying and wave filtering circuit is connected to power supply indicator circuit and voltage feedback circuit; The output of the first current rectifying and wave filtering circuit is connected to current sampling circuit, and the output of current sampling circuit is connected to output overcurrent short-circuit protection circuit, and the output of output overcurrent short-circuit protection circuit connects with voltage feedback circuit.The utility model structure is simple, and realization is convenient and cost is low, and working stability is reliable, and loss is little, and ripple is little, practical, is convenient to promote the use of.
Description
Technical field
The utility model belongs to power circuit technical field, is specifically related to a kind of interchange and inputs doubleway output DC-stabilized circuit.
Background technology
Power circuit is widely used in various consumer electronics product, as liquid crystal display, LCD TV etc., for providing working power for the functional circuit of this consumer electronics product inside.At present, for consumer electronics products such as liquid crystal indicators, it to need mains voltage transitions by a power circuit is that a galvanic current compresses into powering load.Usually this kind of power circuit should have overload and short-circuit protection function; when there is overload or short circuit in load; this power circuit enters guard mode automatically; on market, other Switching Power Supplies are used in civil power when cannot continue to provide electric energy; by the electric power converter of inside, direct current is converted to alternating current to continue to provide the buffering of short time to protect power device.But the electric power converter of power source internal carries out DC-AC by the magnetic element such as inductance or transformer and changes, the design of magnetic element is complicated, and significantly can reduce the efficiency of transducer; And existing market to commonly use Switching Power Supply cost when meeting that ripple is little, efficiency is high high, cause the cost of whole consumer electronics product high, selling price is high, limits applying and developing of consumer electronics product.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, there is provided a kind of and exchange input doubleway output DC-stabilized circuit, its structure is simple, realization is convenient and cost is low, and working stability is reliable, and loss is little, ripple is little, practical, result of use is good, is convenient to promote the use of.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of interchange inputs doubleway output DC-stabilized circuit, it is characterized in that: the high frequency transformer comprising the electromagnetic interface filter for connecting with 220V alternating current, the rectification circuit connected with the output of electromagnetic interface filter and connect with the output of rectification circuit, and the first DC voltage output circuit and the second DC voltage output circuit; Described high frequency transformer is the high frequency transformer T1 with two groups of primary coils and two groups of secondary coils, is connected to leakage inductance peak absorbing circuit between first group of secondary coil two ends of described high frequency transformer T1; Described first DC voltage output circuit is made up of the first current rectifying and wave filtering circuit and the first bipod power interface J3 of connecting with the output of the first current rectifying and wave filtering circuit, described first current rectifying and wave filtering circuit connects with first group of secondary coil of described high frequency transformer T1, described second DC voltage output circuit is made up of the second current rectifying and wave filtering circuit and the first bipod power interface J2 of connecting with the output of the second current rectifying and wave filtering circuit, and described second current rectifying and wave filtering circuit connects with second group of secondary coil of described high frequency transformer T1; Described first current rectifying and wave filtering circuit is connected to power supply indicator circuit and voltage feedback circuit, first output of described voltage feedback circuit connects with first group of primary coil of described high frequency transformer T1, and the second output of described voltage feedback circuit connects with second group of primary coil of described high frequency transformer T1; The output of described first current rectifying and wave filtering circuit is connected to current sampling circuit, and the output of described current sampling circuit is connected to output overcurrent short-circuit protection circuit, and the output of described output overcurrent short-circuit protection circuit connects with voltage feedback circuit.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described electromagnetic interface filter comprises tripod supply socket J1 for connecting 220V alternating current, fuse F1, piezo-resistance R1, nonpolar electric capacity C3 and common mode inductance L1, connected by one end of fuse F1 and piezo-resistance R1, one end of nonpolar electric capacity C3 and the first input end of common mode inductance L1 for the pin that connects the live wire of 220V alternating current in described tripod supply socket J1, and by nonpolar electric capacity C1 ground connection; Connect for the other end of the pin with piezo-resistance R1 that connect the zero line of 220V alternating current, the other end of nonpolar electric capacity C3 and second input of common mode inductance L1 in described tripod supply socket J1, and by nonpolar electric capacity C2 ground connection; For connecting the pin ground connection of the ground wire of 220V alternating current in described tripod supply socket J1, first output of described common mode inductance L1 is the first output of electromagnetic interface filter, and second output of described common mode inductance L1 is the second output of electromagnetic interface filter.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described rectification circuit comprises rectifier diode D1, rectifier diode D2, rectifier diode D3 and rectifier diode D4, the anode of described rectifier diode D1 and the negative electrode of rectifier diode D2 all connect with the first output of electromagnetic interface filter, and the anode of described rectifier diode D3 and the negative electrode of rectifier diode D4 all connect with the second output of electromagnetic interface filter; The negative electrode of described rectifier diode D1 and the negative electrode of rectifier diode D3 connect and are the cathode voltage output of rectification circuit, and by polar capacitor C5, polar capacitor C6 in parallel and polar capacitor C8 ground connection; The anode of described rectifier diode D2 and the anode of rectifier diode D4 connect and are the cathode voltage output of rectification circuit, and ground connection.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: one end of first group of primary coil of described high frequency transformer T1 connects with the cathode voltage output of rectification circuit, the other end of first group of primary coil of described high frequency transformer T1 connects with the first output of voltage feedback circuit, one end of second group of primary coil of described high frequency transformer T1 connects with the second output of voltage feedback circuit, the other end ground connection of second group of primary coil of described high frequency transformer T1.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described first current rectifying and wave filtering circuit comprises the π type LC filter circuit be made up of I-shaped inductive L2, polar capacitor C10 and polar capacitor C13, and Schottky diode D9 and nonpolar electric capacity C14, described current sampling circuit is made up of resistance R8, the anode of described Schottky diode D9 connects with one end of first group of secondary coil of described high frequency transformer T1, the positive pole of the negative electrode of described Schottky diode D9 and one end of I-shaped inductive L2 and polar capacitor C10 in succession, the other end of described I-shaped inductive L2, the positive pole of polar capacitor C13 and one end of nonpolar electric capacity C14 connect and are the cathode voltage output of the first current rectifying and wave filtering circuit, the other end of first group of secondary coil of described high frequency transformer T1, the negative pole of polar capacitor C10, the negative pole of polar capacitor C13 and the other end of nonpolar electric capacity C14 all connect and are the cathode voltage output of the first current rectifying and wave filtering circuit, and ground connection, 1st pin of described first bipod power interface J3 connects with the cathode voltage output of the first current rectifying and wave filtering circuit, 2nd pin of described first bipod power interface J3 connects with one end of resistance R8, and the other end of described resistance R8 connects with the cathode voltage output of the first current rectifying and wave filtering circuit, described second current rectifying and wave filtering circuit comprises fast recovery diode D8 and polar capacitor C9, the anode of described fast recovery diode D8 connects with one end of second group of secondary coil of described high frequency transformer T1, the negative pole of described polar capacitor C9 connects with the other end of second group of secondary coil of described high frequency transformer T1 and is the cathode voltage output of the second current rectifying and wave filtering circuit, and ground connection, the negative electrode of described fast recovery diode D8 connects with the positive pole of polar capacitor C9 and is the cathode voltage output of the second current rectifying and wave filtering circuit, 1st pin of described second bipod power interface J2 connects with the cathode voltage output of the second current rectifying and wave filtering circuit, and the 2nd pin of described second bipod power interface J2 connects with the cathode voltage output of the second current rectifying and wave filtering circuit.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described power supply indicator electricity routing resistance R7 and light-emitting diode D10 forms, the anode of described light-emitting diode D10 is connected with the cathode voltage output of the first current rectifying and wave filtering circuit by resistance R7, and the negative electrode of described light-emitting diode D10 connects with the 2nd pin of the first bipod power interface J3.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described voltage feedback circuit comprises opto-coupler chip PC817, chip TOP224YN, slide rheostat R6, polar capacitor C16, integrated three-terminal voltage-stabilizing chip TL431 and fast recovery diode D6, 1st pin of described opto-coupler chip PC817 is connected with the negative electrode of Schottky diode D9 by the resistance R2 of series connection and resistance R3, 2nd pin of described opto-coupler chip PC817 connects with the negative electrode of integrated three-terminal voltage-stabilizing chip TL431, and connected with the negative electrode of Schottky diode D9 by resistance R4, the described integrated reference pole of three-terminal voltage-stabilizing chip TL431 connects with the sliding end of slide rheostat R6 and a stiff end, and by resistance R14 ground connection, another stiff end of described slide rheostat R6 is connected with the cathode voltage output of the first current rectifying and wave filtering circuit by resistance R5, the plus earth of described integrated three-terminal voltage-stabilizing chip TL431, the reference pole of described integrated three-terminal voltage-stabilizing chip TL431 be connected to nonpolar electric capacity C11 in parallel and nonpolar electric capacity C12 between negative electrode, 3rd pin of described opto-coupler chip PC817 connects with the 1st pin of chip TOP224YN, and connected with the positive pole of polar capacitor C16 by resistance R13,2nd pin of described chip TOP224YN and the equal ground connection of negative pole of polar capacitor C16, the 3rd pin of described chip TOP224YN is the first output of voltage feedback circuit, 4th pin of described opto-coupler chip PC817 connects with the negative electrode of fast recovery diode D6, and by polar capacitor C7 ground connection, the anode of described fast recovery diode D6 is the second output of voltage feedback circuit.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described output overcurrent short-circuit protection circuit comprises voltage comparator chip LM393 and switching diode D11,2nd pin of described voltage comparator chip LM393 is connected with the cathode voltage output of the second current rectifying and wave filtering circuit (5) by resistance R10, and by resistance R11 ground connection, 3rd pin of described voltage comparator chip LM393 is connected with one end of resistance R8 by resistance R9, 8th pin of described voltage comparator chip LM393 connects with the cathode voltage output of the second current rectifying and wave filtering circuit, the 4th pin ground connection of described voltage comparator chip LM393, 1st pin of described voltage comparator chip LM393 connects with the anode of switching diode D11, and by resistance R12 in parallel and nonpolar electric capacity C15 ground connection, the negative electrode of described switching diode D11 is the output of output overcurrent short-circuit protection circuit, and connect with the 2nd pin of described opto-coupler chip PC817.
Above-mentioned one exchanges input doubleway output DC-stabilized circuit, it is characterized in that: described leakage inductance peak absorbing circuit is made up of transient voltage suppressor diode D5 and fast recovery diode D7, the anode of described transient voltage suppressor diode D5 connects with one end of first group of secondary coil of described high frequency transformer T1, the negative electrode of described fast recovery diode D7 connects with the negative electrode of transient voltage suppressor diode D5, and the anode of described fast recovery diode D7 connects with the other end of first group of secondary coil of described high frequency transformer T1.
The utility model compared with prior art has the following advantages:
1, the utility model is supplied to the power circuit of load after being a kind of electric power of civil power 220V power supply can segmentation, and circuit structure is simple, reasonable in design, and it is convenient to realize.
2, the utility model is while consideration is miniaturized, have employed the chip of low cost dexterously, and has low cost overcurrent short-circuit protection function concurrently.
3, the utility model is provided with electromagnetic interface filter, the first current rectifying and wave filtering circuit and the second current rectifying and wave filtering circuit, and in the first current rectifying and wave filtering circuit, have employed π type LC filter circuit, in conjunction with voltage feedback circuit, the inhibitory action to output voltage ripple can be reached, reduce ripple.
4, the utility model has miniaturized feature, and working stability is reliable, and loss is little, can be widely used in electronic equipment and other consumer electronics products such as LCD TV, computer display, charger.
5, of the present utility model practical, result of use is good, is convenient to promote the use of.
In sum, the utility model circuit structure is simple, and realization is convenient and cost is low, and working stability is reliable, and loss is little, and ripple is little, practical, and result of use is good, is convenient to promote the use of.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Description of reference numerals:
1-electromagnetic interface filter; 2-rectification circuit; 3-high frequency transformer;
4-the first current rectifying and wave filtering circuit; 5-the second current rectifying and wave filtering circuit; 6-leakage inductance peak absorbing circuit;
7-power supply indicator circuit; 8-voltage feedback circuit;
9-output overcurrent short-circuit protection circuit.
Embodiment
As shown in Figure 1, the high frequency transformer 3 that the utility model comprises the electromagnetic interface filter 1 for connecting with 220V alternating current, the rectification circuit 2 connected with the output of electromagnetic interface filter 1 and connects with the output of rectification circuit 2, and the first DC voltage output circuit and the second DC voltage output circuit; Described high frequency transformer 3, for having the high frequency transformer T1 of two groups of primary coils and two groups of secondary coils, is connected to leakage inductance peak absorbing circuit 6 between first group of secondary coil two ends of described high frequency transformer T1; Described first DC voltage output circuit is made up of the first current rectifying and wave filtering circuit 4 and the first bipod power interface J3 of connecting with the output of the first current rectifying and wave filtering circuit 4, described first current rectifying and wave filtering circuit 4 connects with first group of secondary coil of described high frequency transformer T1, described second DC voltage output circuit is made up of the second current rectifying and wave filtering circuit 5 and the first bipod power interface J2 of connecting with the output of the second current rectifying and wave filtering circuit 5, and described second current rectifying and wave filtering circuit 5 connects with second group of secondary coil of described high frequency transformer T1; Described first current rectifying and wave filtering circuit 4 is connected to power supply indicator circuit 7 and voltage feedback circuit 8, first output of described voltage feedback circuit 8 connects with first group of primary coil of described high frequency transformer T1, and the second output of described voltage feedback circuit 8 connects with second group of primary coil of described high frequency transformer T1; The output of described first current rectifying and wave filtering circuit 4 is connected to current sampling circuit, and the output of described current sampling circuit is connected to output overcurrent short-circuit protection circuit 9, and the output of described output overcurrent short-circuit protection circuit 9 connects with voltage feedback circuit 8.
As shown in Figure 1, in the present embodiment, described electromagnetic interface filter 1 comprises tripod supply socket J1 for connecting 220V alternating current, fuse F1, piezo-resistance R1, nonpolar electric capacity C3 and common mode inductance L1, connected by one end of fuse F1 and piezo-resistance R1, one end of nonpolar electric capacity C3 and the first input end of common mode inductance L1 for the pin that connects the live wire of 220V alternating current in described tripod supply socket J1, and by nonpolar electric capacity C1 ground connection; Connect for the other end of the pin with piezo-resistance R1 that connect the zero line of 220V alternating current, the other end of nonpolar electric capacity C3 and second input of common mode inductance L1 in described tripod supply socket J1, and by nonpolar electric capacity C2 ground connection; For connecting the pin ground connection of the ground wire of 220V alternating current in described tripod supply socket J1, first output of described common mode inductance L1 is the first output of electromagnetic interface filter 1, and second output of described common mode inductance L1 is the second output of electromagnetic interface filter 1.During concrete enforcement, the current rating of described fuse F1 is 2A, the voltage rating of described fuse F1 is 220V, described fuse F1 is used for the fuse function voluntarily under realizing circuit short-circuit conditions, prevents from providing the equipment of electric energy to cause damage for this power circuit and by this power circuit under the state of long-time short circuit; Described piezo-resistance R1 is for suppressing surge.Electromagnetic interface filter 1 can allow the useful signal of low frequency pass through smoothly, and have inhibitory action to High-frequency Interference, the High-frequency Interference in AC network can be suppressed the impact of equipment, simultaneously can suppression equipment to the interference of AC network, ensure clean to electrical network of integrated circuit.
As shown in Figure 1, in the present embodiment, described rectification circuit 2 comprises rectifier diode D1, rectifier diode D2, rectifier diode D3 and rectifier diode D4, the anode of described rectifier diode D1 and the negative electrode of rectifier diode D2 all connect with the first output of electromagnetic interface filter 1, and the anode of described rectifier diode D3 and the negative electrode of rectifier diode D4 all connect with the second output of electromagnetic interface filter 1; The negative electrode of described rectifier diode D1 and the negative electrode of rectifier diode D3 connect and are the cathode voltage output of rectification circuit 2, and by polar capacitor C5, polar capacitor C6 in parallel and polar capacitor C8 ground connection; The anode of described rectifier diode D2 and the anode of rectifier diode D4 connect and are the cathode voltage output of rectification circuit 2, and ground connection.During concrete enforcement, the model of described rectifier diode D1, rectifier diode D2, rectifier diode D3 and rectifier diode D4 is 1N4007, and polar capacitor C5, polar capacitor C6 and polar capacitor C8 are all for rectifying and wave-filtering.
As shown in Figure 1, in the present embodiment, one end of first group of primary coil of described high frequency transformer T1 connects with the cathode voltage output of rectification circuit 2, the other end of first group of primary coil of described high frequency transformer T1 connects with the first output of voltage feedback circuit 8, one end of second group of primary coil of described high frequency transformer T1 connects with the second output of voltage feedback circuit 8, the other end ground connection of second group of primary coil of described high frequency transformer T1.
As shown in Figure 1, in the present embodiment, described first current rectifying and wave filtering circuit 4 comprises the π type LC filter circuit be made up of I-shaped inductive L2, polar capacitor C10 and polar capacitor C13, and Schottky diode D9 and nonpolar electric capacity C14, described current sampling circuit is made up of resistance R8, the anode of described Schottky diode D9 connects with one end of first group of secondary coil of described high frequency transformer T1, the positive pole of the negative electrode of described Schottky diode D9 and one end of I-shaped inductive L2 and polar capacitor C10 in succession, the other end of described I-shaped inductive L2, the positive pole of polar capacitor C13 and one end of nonpolar electric capacity C14 connect and are the cathode voltage output of the first current rectifying and wave filtering circuit 4, the other end of first group of secondary coil of described high frequency transformer T1, the negative pole of polar capacitor C10, the negative pole of polar capacitor C13 and the other end of nonpolar electric capacity C14 all connect and are the cathode voltage output of the first current rectifying and wave filtering circuit 4, and ground connection, 1st pin of described first bipod power interface J3 connects with the cathode voltage output of the first current rectifying and wave filtering circuit 4,2nd pin of described first bipod power interface J3 connects with one end of resistance R8, and the other end of described resistance R8 connects with the cathode voltage output of the first current rectifying and wave filtering circuit 4, described second current rectifying and wave filtering circuit 5 comprises fast recovery diode D8 and polar capacitor C9, the anode of described fast recovery diode D8 connects with one end of second group of secondary coil of described high frequency transformer T1, the negative pole of described polar capacitor C9 connects with the other end of second group of secondary coil of described high frequency transformer T1 and is the cathode voltage output of the second current rectifying and wave filtering circuit 5, and ground connection, the negative electrode of described fast recovery diode D8 connects with the positive pole of polar capacitor C9 and is the cathode voltage output of the second current rectifying and wave filtering circuit 5, 1st pin of described second bipod power interface J2 connects with the cathode voltage output of the second current rectifying and wave filtering circuit 5, and the 2nd pin of described second bipod power interface J2 connects with the cathode voltage output of the second current rectifying and wave filtering circuit 5.During concrete enforcement, the model of described Schottky diode D9 is MBR20100CT, and the model of described fast recovery diode D8 is FR207; The input and output of π type LC filter circuit are all in Low ESR.
As shown in Figure 1, in the present embodiment, described power supply indicator circuit 7 is made up of resistance R7 and light-emitting diode D10, the anode of described light-emitting diode D10 is connected with the cathode voltage output of the first current rectifying and wave filtering circuit 4 by resistance R7, and the negative electrode of described light-emitting diode D10 connects with the 2nd pin of the first bipod power interface J3.
As shown in Figure 1, in the present embodiment, described voltage feedback circuit 8 comprises opto-coupler chip PC817, chip TOP224YN, slide rheostat R6, polar capacitor C16, integrated three-terminal voltage-stabilizing chip TL431 and fast recovery diode D6,1st pin of described opto-coupler chip PC817 is connected with the negative electrode of Schottky diode D9 by the resistance R2 of series connection and resistance R3,2nd pin of described opto-coupler chip PC817 connects with the negative electrode of integrated three-terminal voltage-stabilizing chip TL431, and is connected with the negative electrode of Schottky diode D9 by resistance R4; The described integrated reference pole of three-terminal voltage-stabilizing chip TL431 connects with the sliding end of slide rheostat R6 and a stiff end, and by resistance R14 ground connection, another stiff end of described slide rheostat R6 is connected with the cathode voltage output of the first current rectifying and wave filtering circuit 4 by resistance R5, the plus earth of described integrated three-terminal voltage-stabilizing chip TL431, the reference pole of described integrated three-terminal voltage-stabilizing chip TL431 be connected to nonpolar electric capacity C11 in parallel and nonpolar electric capacity C12 between negative electrode; 3rd pin of described opto-coupler chip PC817 connects with the 1st pin of chip TOP224YN, and connected with the positive pole of polar capacitor C16 by resistance R13,2nd pin of described chip TOP224YN and the equal ground connection of negative pole of polar capacitor C16, the 3rd pin of described chip TOP224YN is the first output of voltage feedback circuit 8; 4th pin of described opto-coupler chip PC817 connects with the negative electrode of fast recovery diode D6, and by polar capacitor C7 ground connection, the anode of described fast recovery diode D6 is the second output of voltage feedback circuit 8.During concrete enforcement, the model of described fast recovery diode D6 is FR207, and described integrated three-terminal voltage-stabilizing chip TL431 model is TL431A.
As shown in Figure 1, in the present embodiment, described output overcurrent short-circuit protection circuit 9 comprises voltage comparator chip LM393 and switching diode D11,2nd pin of described voltage comparator chip LM393 is connected with the cathode voltage output of the second current rectifying and wave filtering circuit 5 by resistance R10, and by resistance R11 ground connection, 3rd pin of described voltage comparator chip LM393 is connected with one end of resistance R8 by resistance R9, 8th pin of described voltage comparator chip LM393 connects with the cathode voltage output of the second current rectifying and wave filtering circuit 5, the 4th pin ground connection of described voltage comparator chip LM393, 1st pin of described voltage comparator chip LM393 connects with the anode of switching diode D11, and by resistance R12 in parallel and nonpolar electric capacity C15 ground connection, the negative electrode of described switching diode D11 is the output of output overcurrent short-circuit protection circuit 9, and connect with the 2nd pin of described opto-coupler chip PC817.During concrete enforcement, the model of described switching diode D11 is IN4148.
As shown in Figure 1, in the present embodiment, described leakage inductance peak absorbing circuit 6 is made up of transient voltage suppressor diode D5 and fast recovery diode D7, the anode of described transient voltage suppressor diode D5 connects with one end of first group of secondary coil of described high frequency transformer T1, the negative electrode of described fast recovery diode D7 connects with the negative electrode of transient voltage suppressor diode D5, and the anode of described fast recovery diode D7 connects with the other end of first group of secondary coil of described high frequency transformer T1.During concrete enforcement, the model of described transient voltage suppressor diode D5 is P6E200A, and the model of described fast recovery diode D7 is RF207.
When the utility model uses, the 220V alternating current accessed by tripod supply socket J1 is after electromagnetic interface filter 1 filtering high-frequency interferencing signal, export to rectification circuit 2, AC conversion is export to high frequency transformer T1 after direct current by rectification circuit 2, carry out being divided into two-way to export after voltage transitions through high frequency transformer T1, the first via is 12V ~ 18V direct voltage that the first DC voltage output circuit exports, and the second tunnel is the 12V direct voltage that the second DC voltage output circuit exports; Voltage feedback circuit 8 can detect in real time to the direct voltage that the first DC voltage output circuit exports, when the direct voltage that the first DC voltage output circuit exports reduces, the inner duty ratio of chip TOP224YN is increased, thus the direct voltage making the first DC voltage output circuit export gos up, when the direct voltage that the first DC voltage output circuit exports raises, the inner duty ratio of chip TOP224YN is reduced, thus the direct voltage that the first DC voltage output circuit is exported reduce; Resistance R8 is used for sampling to the output current of the first DC voltage output circuit; when output overcurrent or short circuit; 1st pin of voltage comparator chip LM393 exports high level; carry out exporting to chip TOP224YN after light-coupled isolation through opto-coupler chip PC817; chip TOP224YN carries out hiccup protections, thus serves the function of output overcurrent short-circuit protection.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection range of technical solutions of the utility model.
Claims (9)
1. one kind exchanges input doubleway output DC-stabilized circuit, it is characterized in that: the high frequency transformer (3) comprising the electromagnetic interface filter (1) for connecting with 220V alternating current, the rectification circuit (2) connected with the output of electromagnetic interface filter (1) and connect with the output of rectification circuit (2), and the first DC voltage output circuit and the second DC voltage output circuit, described high frequency transformer (3), for having the high frequency transformer T1 of two groups of primary coils and two groups of secondary coils, is connected to leakage inductance peak absorbing circuit (6) between first group of secondary coil two ends of described high frequency transformer T1, described first DC voltage output circuit is made up of the first current rectifying and wave filtering circuit (4) and the first bipod power interface J3 of connecting with the output of the first current rectifying and wave filtering circuit (4), described first current rectifying and wave filtering circuit (4) connects with first group of secondary coil of described high frequency transformer T1, described second DC voltage output circuit is made up of the second current rectifying and wave filtering circuit (5) and the first bipod power interface J2 of connecting with the output of the second current rectifying and wave filtering circuit (5), described second current rectifying and wave filtering circuit (5) connects with second group of secondary coil of described high frequency transformer T1, described first current rectifying and wave filtering circuit (4) is connected to power supply indicator circuit (7) and voltage feedback circuit (8), first output of described voltage feedback circuit (8) connects with first group of primary coil of described high frequency transformer T1, and the second output of described voltage feedback circuit (8) connects with second group of primary coil of described high frequency transformer T1, the output of described first current rectifying and wave filtering circuit (4) is connected to current sampling circuit, the output of described current sampling circuit is connected to output overcurrent short-circuit protection circuit (9), and the output of described output overcurrent short-circuit protection circuit (9) connects with voltage feedback circuit (8).
2. exchange input doubleway output DC-stabilized circuit according to one according to claim 1, it is characterized in that: described electromagnetic interface filter (1) comprises tripod supply socket J1 for connecting 220V alternating current, fuse F1, piezo-resistance R1, nonpolar electric capacity C3 and common mode inductance L1, connected by one end of fuse F1 and piezo-resistance R1, one end of nonpolar electric capacity C3 and the first input end of common mode inductance L1 for the pin that connects the live wire of 220V alternating current in described tripod supply socket J1, and by nonpolar electric capacity C1 ground connection; Connect for the other end of the pin with piezo-resistance R1 that connect the zero line of 220V alternating current, the other end of nonpolar electric capacity C3 and second input of common mode inductance L1 in described tripod supply socket J1, and by nonpolar electric capacity C2 ground connection; For connecting the pin ground connection of the ground wire of 220V alternating current in described tripod supply socket J1, first output of described common mode inductance L1 is the first output of electromagnetic interface filter (1), and second output of described common mode inductance L1 is the second output of electromagnetic interface filter (1).
3. exchange input doubleway output DC-stabilized circuit according to one according to claim 2, it is characterized in that: described rectification circuit (2) comprises rectifier diode D1, rectifier diode D2, rectifier diode D3 and rectifier diode D4, the anode of described rectifier diode D1 and the negative electrode of rectifier diode D2 all connect with the first output of electromagnetic interface filter (1), and the anode of described rectifier diode D3 and the negative electrode of rectifier diode D4 all connect with the second output of electromagnetic interface filter (1); The negative electrode of described rectifier diode D1 and the negative electrode of rectifier diode D3 connect and are the cathode voltage output of rectification circuit (2), and by polar capacitor C5, polar capacitor C6 in parallel and polar capacitor C8 ground connection; The anode of described rectifier diode D2 and the anode of rectifier diode D4 connect and are the cathode voltage output of rectification circuit (2), and ground connection.
4. exchange input doubleway output DC-stabilized circuit according to one according to claim 3, it is characterized in that: one end of first group of primary coil of described high frequency transformer T1 connects with the cathode voltage output of rectification circuit (2), the other end of first group of primary coil of described high frequency transformer T1 connects with the first output of voltage feedback circuit (8), one end of second group of primary coil of described high frequency transformer T1 connects with the second output of voltage feedback circuit (8), the other end ground connection of second group of primary coil of described high frequency transformer T1.
5. exchange input doubleway output DC-stabilized circuit according to the one described in claim 1 or 4, it is characterized in that: described first current rectifying and wave filtering circuit (4) comprises the π type LC filter circuit be made up of I-shaped inductive L2, polar capacitor C10 and polar capacitor C13, and Schottky diode D9 and nonpolar electric capacity C14, described current sampling circuit is made up of resistance R8, the anode of described Schottky diode D9 connects with one end of first group of secondary coil of described high frequency transformer T1, the positive pole of the negative electrode of described Schottky diode D9 and one end of I-shaped inductive L2 and polar capacitor C10 in succession, the other end of described I-shaped inductive L2, the positive pole of polar capacitor C13 and one end of nonpolar electric capacity C14 connect and are the cathode voltage output of the first current rectifying and wave filtering circuit (4), the other end of first group of secondary coil of described high frequency transformer T1, the negative pole of polar capacitor C10, the negative pole of polar capacitor C13 and the other end of nonpolar electric capacity C14 all connect and are the cathode voltage output of the first current rectifying and wave filtering circuit (4), and ground connection, 1st pin of described first bipod power interface J3 connects with the cathode voltage output of the first current rectifying and wave filtering circuit (4), 2nd pin of described first bipod power interface J3 connects with one end of resistance R8, and the other end of described resistance R8 connects with the cathode voltage output of the first current rectifying and wave filtering circuit (4), described second current rectifying and wave filtering circuit (5) comprises fast recovery diode D8 and polar capacitor C9, the anode of described fast recovery diode D8 connects with one end of second group of secondary coil of described high frequency transformer T1, the negative pole of described polar capacitor C9 connects with the other end of second group of secondary coil of described high frequency transformer T1 and is the cathode voltage output of the second current rectifying and wave filtering circuit (5), and ground connection, the negative electrode of described fast recovery diode D8 connects with the positive pole of polar capacitor C9 and is the cathode voltage output of the second current rectifying and wave filtering circuit (5), 1st pin of the second bipod power interface J2 connects with the cathode voltage output of the second current rectifying and wave filtering circuit (5), and the 2nd pin of described second bipod power interface J2 connects with the cathode voltage output of the second current rectifying and wave filtering circuit (5).
6. exchange input doubleway output DC-stabilized circuit according to one according to claim 5, it is characterized in that: described power supply indicator circuit (7) is made up of resistance R7 and light-emitting diode D10, the anode of described light-emitting diode D10 is connected with the cathode voltage output of the first current rectifying and wave filtering circuit (4) by resistance R7, and the negative electrode of described light-emitting diode D10 connects with the 2nd pin of the first bipod power interface J3.
7. exchange input doubleway output DC-stabilized circuit according to one according to claim 5, it is characterized in that: described voltage feedback circuit (8) comprises opto-coupler chip PC817, chip TOP224YN, slide rheostat R6, polar capacitor C16, integrated three-terminal voltage-stabilizing chip TL431 and fast recovery diode D6, 1st pin of described opto-coupler chip PC817 is connected with the negative electrode of Schottky diode D9 by the resistance R2 of series connection and resistance R3, 2nd pin of described opto-coupler chip PC817 connects with the negative electrode of integrated three-terminal voltage-stabilizing chip TL431, and connected with the negative electrode of Schottky diode D9 by resistance R4, the described integrated reference pole of three-terminal voltage-stabilizing chip TL431 connects with the sliding end of slide rheostat R6 and a stiff end, and by resistance R14 ground connection, another stiff end of described slide rheostat R6 is connected with the cathode voltage output of the first current rectifying and wave filtering circuit (4) by resistance R5, the plus earth of described integrated three-terminal voltage-stabilizing chip TL431, the reference pole of described integrated three-terminal voltage-stabilizing chip TL431 be connected to nonpolar electric capacity C11 in parallel and nonpolar electric capacity C12 between negative electrode, 3rd pin of described opto-coupler chip PC817 connects with the 1st pin of chip TOP224YN, and connected with the positive pole of polar capacitor C16 by resistance R13,2nd pin of described chip TOP224YN and the equal ground connection of negative pole of polar capacitor C16, the 3rd pin of described chip TOP224YN is the first output of voltage feedback circuit (8), 4th pin of described opto-coupler chip PC817 connects with the negative electrode of fast recovery diode D6, and by polar capacitor C7 ground connection, the anode of described fast recovery diode D6 is the second output of voltage feedback circuit (8).
8. exchange input doubleway output DC-stabilized circuit according to one according to claim 7, it is characterized in that: described output overcurrent short-circuit protection circuit (9) comprises voltage comparator chip LM393 and switching diode D11,2nd pin of described voltage comparator chip LM393 is connected with the cathode voltage output of the second current rectifying and wave filtering circuit (5) by resistance R10, and by resistance R11 ground connection, 3rd pin of described voltage comparator chip LM393 is connected with one end of resistance R8 by resistance R9, 8th pin of described voltage comparator chip LM393 connects with the cathode voltage output of the second current rectifying and wave filtering circuit (5), the 4th pin ground connection of described voltage comparator chip LM393, 1st pin of described voltage comparator chip LM393 connects with the anode of switching diode D11, and by resistance R12 in parallel and nonpolar electric capacity C15 ground connection, the negative electrode of described switching diode D11 is the output of output overcurrent short-circuit protection circuit (9), and connect with the 2nd pin of described opto-coupler chip PC817.
9. exchange input doubleway output DC-stabilized circuit according to one according to claim 1, it is characterized in that: described leakage inductance peak absorbing circuit (6) is made up of transient voltage suppressor diode D5 and fast recovery diode D7, the anode of described transient voltage suppressor diode D5 connects with one end of first group of secondary coil of described high frequency transformer T1, the negative electrode of described fast recovery diode D7 connects with the negative electrode of transient voltage suppressor diode D5, and the anode of described fast recovery diode D7 connects with the other end of first group of secondary coil of described high frequency transformer T1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520210749.9U CN204517680U (en) | 2015-04-01 | 2015-04-01 | A kind of interchange inputs doubleway output DC-stabilized circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520210749.9U CN204517680U (en) | 2015-04-01 | 2015-04-01 | A kind of interchange inputs doubleway output DC-stabilized circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204517680U true CN204517680U (en) | 2015-07-29 |
Family
ID=53715608
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520210749.9U Expired - Fee Related CN204517680U (en) | 2015-04-01 | 2015-04-01 | A kind of interchange inputs doubleway output DC-stabilized circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204517680U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549485A (en) * | 2015-12-16 | 2016-05-04 | 华南理工大学 | Household intelligent power utilization control terminal based on DSP |
| CN105932892A (en) * | 2016-05-31 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Input-output common ground based high-voltage adjustable step-down circuit |
| CN107255346A (en) * | 2017-06-22 | 2017-10-17 | 苏州贝艾尔净化科技有限公司 | The power frequency rise volt circuit of fresh air purifier |
| CN108918925A (en) * | 2018-09-21 | 2018-11-30 | 平朔工业集团有限责任公司 | Test power supply for coalcutter electric components |
| CN109039108A (en) * | 2018-07-11 | 2018-12-18 | 佛山市众盈电子有限公司 | A kind of output delay control system of the accurate regulated power supply of high frequency |
| CN109062522A (en) * | 2018-09-19 | 2018-12-21 | 浙江昱荣数码喷印技术有限公司 | A kind of printer control system |
| CN112271939A (en) * | 2020-11-06 | 2021-01-26 | 深圳市道和实业有限公司 | Flyback switching power supply circuit for driving LED fluorescent lamp |
-
2015
- 2015-04-01 CN CN201520210749.9U patent/CN204517680U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105549485A (en) * | 2015-12-16 | 2016-05-04 | 华南理工大学 | Household intelligent power utilization control terminal based on DSP |
| CN105932892A (en) * | 2016-05-31 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Input-output common ground based high-voltage adjustable step-down circuit |
| CN107255346A (en) * | 2017-06-22 | 2017-10-17 | 苏州贝艾尔净化科技有限公司 | The power frequency rise volt circuit of fresh air purifier |
| CN109039108A (en) * | 2018-07-11 | 2018-12-18 | 佛山市众盈电子有限公司 | A kind of output delay control system of the accurate regulated power supply of high frequency |
| CN109062522A (en) * | 2018-09-19 | 2018-12-21 | 浙江昱荣数码喷印技术有限公司 | A kind of printer control system |
| CN108918925A (en) * | 2018-09-21 | 2018-11-30 | 平朔工业集团有限责任公司 | Test power supply for coalcutter electric components |
| CN108918925B (en) * | 2018-09-21 | 2023-11-28 | 中煤平朔发展集团有限公司 | Test power supply for electric components of coal mining machine |
| CN112271939A (en) * | 2020-11-06 | 2021-01-26 | 深圳市道和实业有限公司 | Flyback switching power supply circuit for driving LED fluorescent lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204517680U (en) | A kind of interchange inputs doubleway output DC-stabilized circuit | |
| CN204068405U (en) | The earth leakage protective DC power-supply system of a kind of band | |
| CN102044961A (en) | Circuit for eliminating noise of switching power supply | |
| CN205319949U (en) | Novel simple and easy switching power supply | |
| CN202150743U (en) | Coupling energy taking power supply system for high voltage transmission line fault monitoring | |
| CN112886718B (en) | Resonance compensation type current transformer induction power taking system | |
| CN202068337U (en) | Auxiliary power supply for three-phase intelligent ammeter | |
| CN203933382U (en) | A kind of APFC of tape jam measuring ability | |
| CN205882809U (en) | Charger circuit | |
| CN103997199A (en) | Active power factor correction circuit with fault detection function | |
| CN102810986B (en) | A kind of series topology LED switch power circuit | |
| CN204858973U (en) | Isolation feedback supply circuit of LLC resonant transformation ware | |
| CN201418038Y (en) | External intrinsic safety power supply for mining use | |
| CN216751521U (en) | Switching power supply circuit based on synchronous rectification | |
| CN204030975U (en) | Single-phase and automatic three-phase switching high voltage source | |
| CN208299523U (en) | A kind of multi-functional automated power distribution quick charger of multioutlet | |
| CN217427719U (en) | Multi-protocol quick charging circuit and device | |
| CN105529938A (en) | High-voltage rectification circuit for high-power DC power supply | |
| CN201893695U (en) | Noise elimination circuit of switching power supply | |
| CN108696159A (en) | A kind of unmanned electromechanical sources of 10KW | |
| CN204361923U (en) | With the Switching Power Supply of Multiple isolated outputs | |
| CN202475261U (en) | Power supply circuit of motor protector | |
| CN206977324U (en) | Power circuit for low-voltage circuit breaker | |
| CN201601614U (en) | Power type switching power supply | |
| CN204205996U (en) | A kind of multiplex rectification circuit with defencive function |
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: 20150729 Termination date: 20160401 |