CN201199671Y - Power supply output circuit - Google Patents
Power supply output circuit Download PDFInfo
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- CN201199671Y CN201199671Y CNU2008200227617U CN200820022761U CN201199671Y CN 201199671 Y CN201199671 Y CN 201199671Y CN U2008200227617 U CNU2008200227617 U CN U2008200227617U CN 200820022761 U CN200820022761 U CN 200820022761U CN 201199671 Y CN201199671 Y CN 201199671Y
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Abstract
The utility model discloses a power output circuit which comprises a multipath voltage output end, an Nth-path switch circuit and an Nth-path voltage regulator circuit; and N is a natural number. The control end of the Nth-path switch circuit is connected with a (2N minus 1)th voltage output end; one end of a switch path way is connected with the (2N minus 1)th voltage output end or a 2Nth voltage output end, the other end of the switch path way is connected with a (2N plus 1)th voltage output end by the Nth-path voltage regulator circuit, so that the output of (2N plus 1)th voltage is controlled by adopting (2N minus 1)th voltage, and the potential value of the (2N plus 1)th voltage is limited by the Nth-path voltage regulator circuit, thereby satisfying the requirements of a subsequent module circuit to the power-up sequence of different power supply sources. The power output circuit has the advantages of simple structure, low cost, and high reliability and operability, and can be applied in electronic devices, thereby effectively reducing the cost of the complete electronic devices, and improving the market competitive power of the electronic devices, in particular to household devices.
Description
Technical field
The utility model belongs to the power circuit technical field, specifically, relates to a kind of power output circuit that satisfies the modular circuit electric sequence.
Background technology
For present modular circuit, particularly powerful main process chip needs several power voltage supplies usually during electricity work thereon, and the electric sequence of different power supplies is all had concrete requirement.At present, in power output circuit commonly used, all do not consider the problem of voltage output order,, then can cause damage main process chip if subsequent conditioning circuit does not have respective handling again.Normally move for guaranteeing that this type of main process chip can power on, adopting usually increases corresponding power supply chip in the outside of existing power supply output circuit, to satisfy the electric sequence of main process chip to different power supplies.If adopt special-purpose power supply chip to satisfy the electric sequence of main process chip, then can cause the increase of circuit cost undoubtedly, and then have a strong impact on the market competitiveness of electronic equipment.
The utility model content
The utility model adopts the power source special chip to satisfy the problem that cost that the modular circuit electric sequence brought raises in order to solve the existing power supply output circuit, provide a kind of circuit structure power output circuit simple and with low cost, under the prerequisite that need not use the power source special chip, can reach the designing requirement of satisfying the required multiple-way supply power supply electrifying order of subsequent module circuit.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of power output circuit comprises the plurality of voltages output, and N path switching circuit and N road voltage stabilizing circuit, and N is a natural number; Wherein, the control end of described N path switching circuit connects the 2N-1 voltage output end, one end of its switch ways connects described 2N-1 voltage output end or 2N voltage output end, and the other end of switch ways connects the 2N+1 voltage output end through N road voltage stabilizing circuit.Like this, by adopting the output of 2N-1 voltage control 2N+1 voltage, and limit the potential value of 2N+1 voltage, satisfy of the requirement of subsequent module circuit different power supply electric sequences thereby can reach by N road voltage stabilizing circuit.
As wherein a kind of way of realization of described voltage stabilizing circuit, described voltage stabilizing circuit preferably adopts accurate reference voltage circuit to realize, all mainly comprises an adjustable shunt regulator and a bleeder circuit in each road voltage stabilizing circuit; Wherein, described bleeder circuit connects the 2N+1 voltage output end, and its dividing potential drop node connects the reference voltage utmost point of described adjustable shunt regulator, and the negative electrode of described adjustable shunt regulator connects the 2N-1 voltage output end, plus earth.Between the negative electrode of described adjustable shunt regulator and the reference voltage utmost point, be parallel with an electric capacity.
Further, described bleeder circuit adopts the form of resistor voltage divider circuit to realize, specifically comprise two divider resistances, the reference voltage utmost point of described adjustable shunt regulator connects the switch ways of described switching circuit by one of them divider resistance, and passes through another divider resistance ground connection.
Another way of realization as described voltage stabilizing circuit: described voltage stabilizing circuit can adopt a voltage stabilizing didoe to realize simply; Wherein, the negative electrode of described voltage stabilizing didoe connects the 2N+1 voltage output end, plus earth.
Again further, described switching circuit can adopt multiple components and parts such as triode, metal-oxide-semiconductor, relay or switch chip to connect and realize, preferably adopts NPN type triode to make up described switching circuit; Wherein, the base stage of described NPN type triode is connected to the 2N-1 voltage output end, collector electrode is connected to described 2N-1 voltage output end or 2N voltage output end, emitter is connected to the 2N+1 voltage output end through N road voltage stabilizing circuit, by adopting the form of emitter-base bandgap grading output, to increase the load capacity of power supply.
Again further, the potential value of described 2N-1 voltage output end equals the potential value of the required N road power supply of subsequent module circuit, and wherein, the electric sequence of the N+1 road power supply that described modular circuit is required lags behind successively with the increase of N.
Further, also include transformer in described power output circuit, it is elementary through rectification circuit or current rectifying and wave filtering circuit connection AC power, secondary output first voltage and 2N voltage.
Preferably, described N equals 1.
Compared with prior art, advantage of the present utility model and good effect are: the utility model is set up power output circuit by adopting discrete component, to export the different power supply of multiple electrifying timing sequence and current potential, thereby on the basis that need not use the power source special chip, satisfied of the requirement of subsequent module circuit, had that circuit structure is simple, cost is low, significant advantages such as reliability and operability height multiple-way supply power supply electrifying order.Meanwhile, by the switching circuit in the power output circuit being designed to triode emitter-base bandgap grading output form, thereby increased the load capacity of power supply.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the theory diagram of the power output circuit that proposes of the utility model;
Fig. 2 is the circuit theory diagrams of wherein a kind of embodiment of power output circuit shown in Figure 1;
Fig. 3 is the circuit theory diagrams of another embodiment of power output circuit shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Power output circuit of the present utility model is according to the requirement of subsequent module circuit (such as main process chip that needs the multiple-way supply power supply etc.) to different power supply electric sequences, adopt by the required electric sequence power supply the earliest of the direct output module circuit of transformer, and utilize this power supply control to be later than the power supply output of its electric sequence, by that analogy, thereby realize the different power supply of output multichannel electric sequence, satisfy the electric sequence of each road power supply of modular circuit, guaranteed its normal, trouble free service.Use for fear of the power source special chip, to reduce the circuitry cost, the utility model adopts discrete component to set up described power output circuit, specifically comprises chief components such as transformer, switching circuit, voltage stabilizing circuit, and its schematic block circuit diagram is referring to shown in Figure 1.Wherein, AC power connects the elementary of transformer by rectification circuit or current rectifying and wave filtering circuit, after alternating voltage is converted into direct voltage, at least one road of secondary output low-voltage dc power supply by transformer, such as first voltage, perhaps export first voltage and 2N voltage simultaneously, wherein, N is a natural number, as shown in Figure 1.Wherein, first voltage is the required electric sequence of subsequent module circuit power supply the earliest, and the first power input VIN_1 of link block circuit provides first power supply for modular circuit immediately after circuitry powers on.The control end CON1 of switching circuit connects the first voltage output end V1, one end A1 of switch ways connects the first voltage output end V1 or the second voltage output end V2, the other end B1 of switch ways connects tertiary voltage output V3 through voltage stabilizing circuit, the required electric sequence of output subsequent module circuit slightly is later than the tertiary voltage of first voltage, and then the second source input VIN_2 of link block circuit, after powering on, circuitry provides second power supply to modular circuit.Like this, the form of the output by adopting the first voltage control tertiary voltage has realized the electric sequence of the electric sequence of first voltage early than tertiary voltage, and then has satisfied the requirement of subsequent module circuit to the different power supply electric sequences of two-way.By that analogy, when the subsequent module circuit needs the different power supply of three road electric sequences, the double switch circuit need be set in power output circuit, the syndeton of first via switching circuit as mentioned above, the control end CON2 of second path switching circuit connects tertiary voltage output V3, one end A2 of switch ways connects tertiary voltage output V3 or the 4th voltage output end V4, the other end B2 of switch ways connects the 5th voltage output end V5 through another voltage stabilizing circuit, the required electric sequence of output subsequent module circuit slightly is later than the 5th voltage of tertiary voltage, and then the 3rd power input VIN_3 of link block circuit, after powering on, circuitry provides the 3rd power supply to modular circuit.For the needs modular circuit of multiple-way supply power supply more, can obtain according to circuit structure simple inference as mentioned above, the control end CONN that is about to the N path switching circuit is connected to the 2N-1 voltage output end, one end AN of its switch ways connects 2N-1 voltage output end V (2N-1) or 2N voltage output end V2N, the other end BN of switch ways connects 2N+1 voltage output end V (2N+1) through N road voltage stabilizing circuit, and then the power supply that provides N+1 road electric sequence to lag behind successively with the increase of N to follow-up modular circuit.
Certainly, also can adopt other circuit construction of electric power forms except that transformer shown in Figure 1 and rectification circuit structure to obtain for first voltage and these direct voltages of directly exporting by transformer of 2N voltage, the utility model is not limited thereto.
Concrete structure for switching circuit, the utility model can adopt multiple components and parts with on-off action such as triode, metal-oxide-semiconductor, relay or switch chip to connect and realize, be that example is set forth described switching circuit structure only below with a NPN type triode, for other structure forms, because those of ordinary skill in the art can be with reference to the type of attachment of triode, need not simply obtain under the prerequisite of creative work, therefore, the utility model is no longer given unnecessary details at this.
Consider present modular circuit, such as main process chip, only need the different power supply of two-way electric sequence mostly, for example more common+3.3V and+1.8V (electric sequence of+3.3V is early than the electric sequence of+1.8V), therefore, for describing for simplicity, below only with output+3.3V with+1.8V two-way voltage is example (respectively as first voltage and tertiary voltage among Fig. 1), the wire connection structure of the power output circuit of specifically setting forth the utility model and being proposed.
Embodiment one, referring to shown in Figure 2, in the present embodiment, the reference voltage circuit that the bleeder circuit that adopts an adjustable shunt regulator U1, capacitor C 1 and to be made up of two divider resistance R2, R3 constitutes a precision is used as the voltage stabilizing circuit among Fig. 1, makes by tertiary voltage output V2 and can export stable, accurate+1.8V power supply.
Wherein, as first voltage+the 3.3V power supply provides by the secondary direct output of transformer, the base stage that connects NPN type triode Q1 by resistance R 1, described triode Q1 preferably adopts big electric current triode device to realize, such as MPS650 etc., the second voltage output end V2 (be+2.1V voltage output end among Fig. 2, provided by the secondary direct output of transformer) is provided its collector electrode, perhaps+3.3V voltage output end, the i.e. first voltage output end V1; Its emitter connects the tertiary voltage output, promptly+and the 1.8V voltage output end.On described tertiary voltage output V3, be connected with the reference voltage circuit of the precision of forming by adjustable shunt regulator U1, capacitor C 1 and two divider resistance R2, R3.Wherein, the negative electrode of adjustable shunt regulator U1 is by resistance R 1 connection+3.3V voltage output end, plus earth, the reference voltage utmost point connects the dividing potential drop node of the bleeder circuit of being made up of divider resistance R2, R3, the reference voltage utmost point that is adjustable shunt regulator U1 connects tertiary voltage output V3 by divider resistance R2 on the one hand, on the other hand by divider resistance R3 ground connection.By regulating the resistance of divider resistance R2, R3, make the reference voltage V of the current potential at its dividing potential drop node place at the reference voltage utmost point that equals adjustable shunt regulator U1
REF(such as V
REF=1.25V) time, the current potential of tertiary voltage output V3 just equals+1.8V, like this, just satisfied follow-up main process chip right+requirement that powers on of 1.8V power supply.
Described adjustable shunt regulator U1 can adopt the accurate shunt regulator of adjustable output to realize, such as TLV431 etc., a capacitor C 1 in parallel between its negative electrode and the reference voltage utmost point, by the resistance of control capacittance C1 and divider resistance R2, R3, can guarantee by the stable+1.8V power supply of tertiary voltage output V3 output.
Embodiment two, and referring to shown in Figure 3, in the present embodiment, described voltage stabilizing circuit adopts a voltage stabilizing didoe ZD1 to realize.Wherein, the negative electrode of described voltage stabilizing didoe ZD1 connects tertiary voltage output V3, plus earth, its reverse breakdown pressure drop equals 1.8V, the structure of switching circuit is with shown in the embodiment one, so just, can well guarantee+3.3V and+output of 1.8V voltage order, satisfy follow-up main process chip right+3.3V and+requirement that powers on of 1.8V power supply.
Certainly,, can realize the output of plurality of voltages, to satisfy the subsequent module circuit to the more requirement of multiple-way supply power supply by switching circuit in the above-mentioned power output circuit and voltage stabilizing circuit are carried out simple extension.To export three road voltages is example, in described power output circuit, need to design two-way NPN type triode, the connected mode of first via NPN type triode is shown in Q1, the base stage of the second road NPN type triode connects tertiary voltage output V3, collector electrode connects described tertiary voltage output V3 or the 4th voltage output end V4, and can directly be exported by transformer by the voltage of described the 4th voltage output end V4 output provides; Emitter connects the 5th voltage output end V5 through another voltage stabilizing circuit, exports the power supply of the 3rd required electric sequence of follow-up main process chip, i.e. the 3rd power supply.And for the main process chip of needs (N+1) road power supply, N road NPN type triode and N road voltage stabilizing circuit then need be set in power output circuit, wherein, the base stage of the NPN type triode in the N path switching circuit connects 2N-1 voltage output end V (2N-1), collector electrode connects 2N-1 voltage output end V (2N-1) or 2N voltage output end V2N, and emitter connects 2N+1 voltage output end V (2N+1) through N road voltage stabilizing circuit.Set up switching circuit by the form that adopts the output of triode emitter-base bandgap grading, can increase the load capacity of power supply, improve the suitable application area of power output circuit.The concrete structure of N road voltage stabilizing circuit can adopt embodiment one or embodiment two cited circuit forms to realize, certainly, be suitable for too at this for other voltage stabilizing circuit structures with pressure limiting effect, the utility model is not limited in embodiment one, 2 two kind of form.
Power output circuit of the present utility model is simple and practical, reliability and operability height, not only can effectively ensure modular circuit safe and reliable operations such as follow-up main process chip, and circuit cost is low, help to reduce the complete machine cost of electronic equipment, can be widely used in all products of voltage output order that chip power supply voltage electric sequence meets this power output circuit, such as Power Line Carrier Communication Module etc.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a power output circuit comprises the plurality of voltages output, it is characterized in that: include N path switching circuit and N road voltage stabilizing circuit in described power output circuit, N is a natural number; Wherein, the control end of described N path switching circuit connects the 2N-1 voltage output end, one end of its switch ways connects described 2N-1 voltage output end or 2N voltage output end, and the other end of switch ways connects the 2N+1 voltage output end through N road voltage stabilizing circuit.
2. power output circuit according to claim 1, it is characterized in that: in the voltage stabilizing circuit of described N road, include an adjustable shunt regulator and a bleeder circuit respectively, described bleeder circuit connects the 2N+1 voltage output end, its dividing potential drop node connects the reference voltage utmost point of described adjustable shunt regulator, the negative electrode of described adjustable shunt regulator connects the 2N-1 voltage output end, plus earth.
3. power output circuit according to claim 2 is characterized in that: be parallel with an electric capacity between the negative electrode of described adjustable shunt regulator and the reference voltage utmost point.
4. power output circuit according to claim 2, it is characterized in that: in described bleeder circuit, include two divider resistances, the reference voltage utmost point of described adjustable shunt regulator connects the switch ways of described switching circuit by one of them divider resistance, and passes through another divider resistance ground connection.
5. power output circuit according to claim 1 is characterized in that: include a voltage stabilizing didoe respectively in the voltage stabilizing circuit of described N road, its negative electrode connects the 2N+1 voltage output end, plus earth.
6. according to each described power output circuit in the claim 1 to 5, it is characterized in that: in described N path switching circuit, include a NPN type triode respectively, wherein, the base stage of the NPN type triode in the N path switching circuit connects the 2N-1 voltage output end, collector electrode connects 2N-1 voltage output end or 2N voltage output end, and emitter connects the 2N+1 voltage output end through N road voltage stabilizing circuit.
7. according to each described power output circuit in the claim 1 to 5, it is characterized in that: described switching circuit adopts metal-oxide-semiconductor, relay or switch chip to be formed by connecting.
8. power output circuit according to claim 6, it is characterized in that: the potential value of described 2N-1 voltage output end equals the potential value of the required N road power supply of subsequent module circuit, wherein, the electric sequence of the required N+1 road power supply of described modular circuit lags behind successively with the increase of N.
9. power output circuit according to claim 8 is characterized in that: also include transformer in described power output circuit, it is elementary through rectification circuit or current rectifying and wave filtering circuit connection AC power, secondary output first voltage and 2N voltage.
10. power output circuit according to claim 9 is characterized in that: described N preferably equals 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200227617U CN201199671Y (en) | 2008-05-20 | 2008-05-20 | Power supply output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200227617U CN201199671Y (en) | 2008-05-20 | 2008-05-20 | Power supply output circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201199671Y true CN201199671Y (en) | 2009-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200227617U Expired - Lifetime CN201199671Y (en) | 2008-05-20 | 2008-05-20 | Power supply output circuit |
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| CN (1) | CN201199671Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103733498A (en) * | 2010-09-27 | 2014-04-16 | 库帕技术公司 | Universal-voltage discrete input circuit |
| CN104201876B (en) * | 2014-09-03 | 2017-01-25 | 福建星网锐捷网络有限公司 | Control circuit and system of power-on and power-down control signal |
-
2008
- 2008-05-20 CN CNU2008200227617U patent/CN201199671Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103733498A (en) * | 2010-09-27 | 2014-04-16 | 库帕技术公司 | Universal-voltage discrete input circuit |
| CN103733498B (en) * | 2010-09-27 | 2017-03-22 | 库帕技术公司 | universal-voltage discrete input circuit |
| CN104201876B (en) * | 2014-09-03 | 2017-01-25 | 福建星网锐捷网络有限公司 | Control circuit and system of power-on and power-down control signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090225 |