CN203645539U - Positive and negative voltage generation circuit - Google Patents
Positive and negative voltage generation circuit Download PDFInfo
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- CN203645539U CN203645539U CN201320712437.9U CN201320712437U CN203645539U CN 203645539 U CN203645539 U CN 203645539U CN 201320712437 U CN201320712437 U CN 201320712437U CN 203645539 U CN203645539 U CN 203645539U
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 40
- 229910052710 silicon Inorganic materials 0.000 claims description 40
- 239000010703 silicon Substances 0.000 claims description 40
- 230000000087 stabilizing effect Effects 0.000 claims description 34
- 238000012546 transfer Methods 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 239000003381 stabilizer Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000009466 transformation Effects 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 41
- 238000010586 diagram Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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Abstract
The utility model discloses a positive and negative voltage generation circuit in the technical field of voltage transformation. The positive and negative voltage generation circuit comprises an energy transferring circuit which is used for transferring electric energy generated by input voltages, a positive voltage generation circuit which is used for converting the electric energy into positive voltage values through a DC-DC converter, a negative voltage generation circuit which is used for converting the electric energy into negative voltage values. The positive and negative voltage generation circuit, through the DC-DC converter, realizes functions of a voltage conversion integrated chip in a conventional positive and negative voltage generation circuit, helps to substantially reduce the production cost of electronic products. The positive and negative voltage generation circuit is clear in circuit structure and simple in principles, can adjust the converted voltage values according to actual needs of an electronic device, and is applicable to electronic devices having different voltage indexes. The number of the voltage generation circuits, the positive voltage generation circuits, positive voltage adjusting circuits or negative voltage adjusting circuits can be adjusted according to the quantity of the electronic devices, and thus the application scope of the positive and negative voltage generation circuit is substantially enlarged.
Description
Technical field
The utility model belongs to voltage transitions technical field, relates in particular to a kind of positive/negative-pressure and produces circuit.
Background technology
At present, electronic product is extensively present in daily life, arrives greatly vehicle appliance, little to computer telephone, for people's life brings great service and facility.
Electronic product has control circuit separately, along with scientific and technological development, is more to realize needed specific function with integrated control circuit in electronic product.And there is variation in the function of electronic product, realize different functions and just need to power to the device of specific function.But common power supply signal is all relatively to fix, if magnitude of voltage is 220 volts, 5 volts, 12 volts etc.And the device of specific function often has the power requirement of oneself, as the positive/negative-pressure of often using in electronic equipment.Therefore, the components and parts that have pair supply voltage to transform in electronic product, for meeting the power requirement of each certain device.
At present, it is mainly by integrated chip (Integrated Chip that power supply is transformed, IC) realize, although the integrated chip negligible amounts using, but integrated chip price is generally higher, this has just increased the production cost of electronic product, and then has increased the weight of user's financial burden, inconvenient maintenance, is unfavorable for the universal of electronic product on a large scale.
Utility model content
The utility model provides a kind of positive/negative-pressure to produce circuit, high to solve the production cost that existing electronic product exists, the technical problems such as inconvenient maintenance.
The utility model discloses a kind of positive/negative-pressure and produce circuit, for input voltage being converted into the voltage of setting; Described positive/negative-pressure produces circuit and comprises:
Energy transfer circuit, the electric energy producing for transmitting input voltage;
Malleation produces circuit, for described electric energy being converted to positive voltage value by DC-DC transducer;
Negative voltage generating circuit, for being converted to negative value by described electric energy.
Preferably, described energy transfer circuit comprises inductance.
Preferably, described malleation produces circuit and also comprises malleation change-over circuit, wherein:
Described malleation change-over circuit comprises the first voltage-stabiliser tube and the first parallel circuits; The anode of described the first voltage-stabiliser tube is connected with described energy transfer circuit; The negative electrode of described the first voltage-stabiliser tube is connected with one end of described the first parallel circuits; The other end ground connection of described the first parallel circuits;
Described the first parallel circuits comprises the first resistance circuit, the 7th electric capacity and the 8th electric capacity; Described the first resistance circuit, the 7th electric capacity and the 8th Capacitance parallel connection;
Described the first resistance circuit comprises the 7th resistance and the 8th resistance; Described the 7th resistance and the series connection of the 8th resistance.
Preferably, described malleation produces circuit and also comprises feedback circuit, wherein:
One end of described feedback circuit is connected with the feedback interface of described DC-DC transducer; The other end of described feedback circuit is connected with one end of close described the 8th resistance of described the 7th resistance.
Preferably, described malleation produces circuit and also comprises drive circuit, wherein:
Described drive circuit comprises the 4th resistance and the second parallel circuits; Described input voltage is accessed in one end of described the 4th resistance, and the other end of described the 4th resistance is connected with one end of described the second parallel circuits; The other end ground connection of described the second parallel circuits; The control port of described DC-DC transducer is connected with one end of close described second parallel circuits of described the 4th resistance;
Described the second parallel circuits comprises the 5th resistance and the 6th electric capacity; Described the 5th resistance and the 6th Capacitance parallel connection.
Preferably, described negative voltage generating circuit comprises voltage-multiplying circuit, wherein:
Described voltage-multiplying circuit comprises the first electric capacity, diode circuit, the second electric capacity and the 3rd electric capacity; Described the second electric capacity and the 3rd electric capacity are in parallel with described diode circuit respectively;
Described diode circuit comprises the first diode and the second diode; The anodic bonding of the negative electrode of described the first diode and the second diode; The minus earth of described the second diode; One end of described the first electric capacity is connected with described energy transfer circuit; The other end of described the first electric capacity is connected with the negative electrode of the first diode.
Preferably, described positive/negative-pressure produces circuit and also comprises positive voltage regulator circuit, for described positive voltage value is adjusted.
Preferably, described positive voltage regulator circuit comprises the first voltage stabilizing circuit, wherein:
Described the first voltage stabilizing circuit comprises the 9th resistance, the 3rd parallel circuits; One end of described the 9th resistance is connected with the negative electrode of described the first voltage-stabiliser tube; The other end of described the 9th resistance is connected with one end of the 3rd parallel circuits; The other end ground connection of described the 3rd parallel circuits;
Described the 3rd parallel circuits comprises the 9th electric capacity, the tenth electric capacity and the first controllable silicon diode circuit of voltage regulation; Described the 9th electric capacity, the tenth electric capacity and the first controllable silicon diode circuit of voltage regulation parallel connection;
Described the first controllable silicon diode circuit of voltage regulation comprises the first controllable silicon voltage stabilizing didoe, the tenth resistance and the 11 resistance; The two ends of described the tenth resistance are connected with grid and the negative electrode of described the first controllable silicon voltage stabilizing didoe respectively; The two ends of described the 11 resistance respectively with grid and the anodic bonding of described the first controllable silicon voltage stabilizing didoe.
Preferably, described positive/negative-pressure produces circuit and also comprises negative pressure regulating circuit, for described negative value is adjusted.
Preferably, described negative pressure regulating circuit comprises the second voltage stabilizing circuit, wherein:
Described the second voltage stabilizing circuit comprises the first resistance and the 4th parallel circuits; One end of described the first resistance is connected with one end of anodic bonding described the first diode with described the 3rd electric capacity; The other end of described the first resistance is connected with the 4th parallel circuits; Described the 4th parallel circuits ground connection;
Described the 4th parallel circuits comprises the 4th electric capacity, the 5th electric capacity and the second controllable silicon diode circuit of voltage regulation; Described the 4th electric capacity, the 5th electric capacity and the second controllable silicon diode circuit of voltage regulation parallel connection;
Described the second controllable silicon diode circuit of voltage regulation comprises the second controllable silicon voltage stabilizing didoe, the second resistance and the 3rd resistance; The two ends of described the second resistance are connected with grid and the negative electrode of described the second controllable silicon voltage stabilizing didoe respectively; The two ends of described the 3rd resistance respectively with grid and the anodic bonding of described the second controllable silicon voltage stabilizing didoe.
In sum, the utility model is realized the function of the voltage transitions integrated chip in existing positive/negative-pressure generation circuit by DC-DC transducer, under the prerequisite of normal use that guarantees electronic product, greatly reduce the production cost of electronic product;
Circuit structure of the present utility model is clear, and principle is simple, can adjust the magnitude of voltage after changing according to the actual needs of electronic device; Electronic device to multiple different voltage indexes is all suitable for;
Malleation of the present utility model produces the quantity of circuit, negative voltage generating circuit, positive voltage regulator circuit or negative pressure regulating circuit and can adjust according to the quantity of electronic device, has greatly improved the range of application of positive/negative-pressure generation circuit of the present utility model;
Each device that positive/negative-pressure of the present utility model produces in circuit can keep in repair separately or replace, and has saved production cost, has reduced maintenance difficulty.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the positive/negative-pressure of embodiment 1 produces circuit;
Fig. 2 is the circuit diagram that the positive/negative-pressure of embodiment 1 produces circuit;
Fig. 3 is the schematic diagram that the positive/negative-pressure of embodiment 2 produces circuit;
Fig. 4 is the circuit diagram that the positive/negative-pressure of embodiment 2 produces circuit;
Fig. 5 is the schematic diagram that the positive/negative-pressure of embodiment 3 produces circuit;
Fig. 6 is the circuit diagram that the positive/negative-pressure of embodiment 3 produces circuit;
Fig. 7 is the schematic diagram that the positive/negative-pressure of embodiment 4 produces circuit;
Fig. 8 is the circuit diagram that the positive/negative-pressure of embodiment 4 produces circuit.
Fig. 9 is the practical circuit diagram that the positive/negative-pressure of embodiment 4 produces circuit.
Embodiment
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
High in order to solve the production cost that existing electronic product exists, the problems such as inconvenient maintenance, the utility model provides a kind of positive/negative-pressure to produce circuit.
Embodiment 1
Referring to Fig. 1 and Fig. 2, the present embodiment provides a kind of positive/negative-pressure to produce circuit, for input voltage VCC_+5V being converted into the voltage of setting; Be applied to as in other electronic devices such as TV, computer, mobile phone.Described positive/negative-pressure produces circuit and comprises:
Energy transfer circuit, the electric energy producing for transmitting input voltage;
Malleation produces circuit, for described electric energy being converted to positive voltage value by DC-DC transducer;
Negative voltage generating circuit, for being converted to negative value by described electric energy.
The utility model has adopted DC-DC transducer U2, than existing voltage transitions integrated chip, is guaranteeing, under the normal prerequisite using of electronic product, to greatly reduce the production cost of electronic product; Circuit structure of the present utility model is clear, can carry out in good time adjustment to the magnitude of voltage after changing according to the actual needs of electronic device; Especially, the utility model can be applicable to the electronic device of multiple different voltage indexes, and practicality is high.
For the ease of the conversion of voltage, need to store by energy transfer circuit the electric energy of input voltage.Energy transfer circuit can be realized by multiple circuit or device.The described energy transfer circuit of the present embodiment comprises inductance L 7, produces circuit and further controls cost further to simplify positive/negative-pressure.Energy transfer circuit storage power is by the interface control to DC-DC transducer U2, make energy transfer circuit by certain frequency cut off and conducting, thereby on energy transfer circuit store electrical energy.
Malleation produces circuit for generation of malleation.Malleation is not electronic device required voltage value conventionally after producing.So malleation produces circuit and also comprises malleation change-over circuit.The described malleation change-over circuit of the present embodiment comprises the first voltage-stabiliser tube D3 and the first parallel circuits; The anode of described the first voltage-stabiliser tube D3 is connected with described energy transfer circuit; The negative electrode of described the first voltage-stabiliser tube D3 is connected with one end of described the first parallel circuits; The other end ground connection of described the first parallel circuits; Described the first parallel circuits comprises the first resistance circuit, the 7th capacitor C 7 and the 8th capacitor C 8; Described the first resistance circuit, the 7th capacitor C 7 and the 8th capacitor C 8 parallel connections; Described the first resistance circuit comprises the 7th resistance R 7 and the 8th resistance R 8; Described the 7th resistance R 7 and the 8th resistance R 8 are connected.
The first voltage-stabiliser tube D3 of malleation change-over circuit can guarantee also can not damage other devices in the time that the malleation value of malleation change-over circuit generation is greater than input voltage; The 7th capacitor C 7 and the 8th capacitor C 8 play the effect of output setting positive voltage on the one hand, can also reject on the other hand the High-frequency Interference in voltage.
The electric energy that malleation change-over circuit can produce energy transfer circuit is to a certain extent converted to the positive voltage of setting, for the use of electronic device.
In order to control the positive voltage value of energy transfer circuit and the output of malleation change-over circuit, described malleation produces circuit and also comprises feedback circuit, and the positive voltage value that aligns voltage conversion circuit generation by feedback circuit is controlled.One end of described feedback circuit is connected with the feedback interface of described DC-DC transducer U2; The other end of described feedback circuit is connected with one end of close described the 8th resistance of described the 7th resistance.The feedback circuit of the present embodiment is realized by a resistance.By to the 7th resistance R 7, the 8th resistance R 8 and the 6th resistance R 6(feedback circuit) resistance arrange, can react the output malleation value of malleation change-over circuit by the 6th resistance R 6 whether identical with the output malleation value of setting, if different and exceed an error, DC-DC transducer U2 can be by controlling the disconnection of energy transfer circuit and connect frequency the output malleation value that control malleation change-over circuit.
The output malleation value that the present embodiment aligns voltage conversion circuit by DC-DC transducer U2 is controlled.For DC-DC transducer U2 is normally worked, need the drive circuit of corresponding DC-DC transducer to drive DC-DC transducer U2.The described drive circuit of the present embodiment comprises the 4th resistance R 4 and the second parallel circuits; Described input voltage is accessed in one end of described the 4th resistance R 4, and the other end of described the 4th resistance R 4 is connected with one end of described the second parallel circuits; The other end ground connection of described the second parallel circuits; The control port of described DC-DC transducer U2 is connected with one end of close described second parallel circuits of described the 4th resistance R 4; Described the second parallel circuits comprises the 5th resistance R 5 and the 6th capacitor C 6; Described the 5th resistance R 5 and the 6th capacitor C 6 parallel connections.
Drive circuit is directly connected with input voltage.So as long as there is input voltage, drive circuit will drive DC-DC transducer U2 work, in the DC-DC transducer U2 course of work without drive circuit is adjusted.
In order to adapt to the needs of electronic product, the present embodiment also comprises negative voltage generating circuit, and described negative voltage generating circuit comprises voltage-multiplying circuit.The described voltage-multiplying circuit of the present embodiment comprises
The first capacitor C 1, diode circuit U4, the second capacitor C 2 and the 3rd capacitor C 3; Described the second capacitor C 2 and the 3rd capacitor C 3 are in parallel with described diode circuit respectively;
Described diode circuit U4 comprises the first diode D1 and the second diode D2; The anodic bonding of the negative electrode of described the first diode D1 and the second diode D2; The minus earth of described the second diode D2; One end of described the first capacitor C 1 is connected with described energy transfer circuit; The other end of described the first capacitor C 1 is connected with the negative electrode of the first diode D1.
As shown in Figure 2, wherein, VCC is input voltage to the structure chart of an actual positive/negative-pressure generation circuit of the present embodiment; + VDD is the output voltage values of malleation change-over circuit;-VDD is the output voltage values of negative pressure change-over circuit.
Embodiment 2
Referring to Fig. 3 and Fig. 4, the present embodiment and embodiment 1 belong to same inventive concept.Except the positive/negative-pressure described in embodiment 1 produces network component, the present embodiment also provides positive voltage regulator circuit, for described positive voltage value is adjusted.Due to positive not energy content memory device of voltage regulator circuit, so positive voltage regulator circuit is not having under the prerequisite in external energy source, can only be by the output malleation value of malleation change-over circuit toward little adjustment.
The described positive voltage regulator circuit of the present embodiment comprises the first voltage stabilizing circuit.Described the first voltage stabilizing circuit comprises the 9th resistance R 9, the 3rd parallel circuits; One end of described the 9th resistance R 9 is connected with the negative electrode of described the first voltage-stabiliser tube D3; The other end of described the 9th resistance R 9 is connected with one end of the 3rd parallel circuits; The other end ground connection of described the 3rd parallel circuits;
Described the 3rd parallel circuits comprises the 9th capacitor C 9, the tenth capacitor C 10 and the first controllable silicon diode circuit of voltage regulation; Described the 9th capacitor C 9, the tenth capacitor C 10 and the first controllable silicon diode circuit of voltage regulation parallel connection;
Described the first controllable silicon diode circuit of voltage regulation comprises the first controllable silicon voltage stabilizing didoe U1, the tenth resistance R the 10 and the 11 resistance R 11; The two ends of described the tenth resistance R 10 are connected with grid and the negative electrode of described the first controllable silicon voltage stabilizing didoe U1 respectively; The two ends of described the 11 resistance R 11 respectively with grid and the anodic bonding of described the first controllable silicon voltage stabilizing didoe U1.
The 9th resistance R 9 is for adjusting to the output malleation value of malleation change-over circuit the setting voltage value of positive voltage regulator circuit.But only have the 9th resistance R 9 can not guarantee the accuracy of setting voltage value of the positive voltage regulator circuit obtaining and stable, and along with the attenuating of the utilization voltage of electronic device, electronic device have with high requirement to the precision and stability of voltage.So, also need the voltage after the 9th resistance R 9 conversions further to adjust.
The method of adjusting to the further filtering of voltage, makes it more stable by the 9th capacitor C 9 and the tenth capacitor C 10.By the tenth resistance R the 10 and the 11 resistance R 11, the first controllable silicon voltage stabilizing didoe U1 is controlled, the magnitude of voltage that makes the two ends of the first controllable silicon voltage stabilizing didoe U1 is electronic device required voltage value.
The quantity of positive voltage regulator circuit can be adjusted according to the quantity of electronic device, and both quantity is identical conventionally.The output voltage values of positive voltage regulator circuit is determined with the operating voltage of electronic device.The structure chart that the actual positive/negative-pressure of of the present embodiment produces circuit as shown in Figure 4, wherein, the output voltage values that+VDD_1 is positive voltage regulator circuit.
Embodiment 3
Referring to Fig. 5 and Fig. 6, the present embodiment and embodiment 1 belong to same inventive concept.Except the positive/negative-pressure described in embodiment 1 produces network component, the present embodiment also provides negative pressure regulating circuit, for described negative value is adjusted.Due to not energy content memory device of negative pressure regulating circuit, so negative pressure regulating circuit is not having under the prerequisite in external energy source, can only be by the absolute value of the output voltage values of negative pressure change-over circuit toward little adjustment.
Described negative pressure regulating circuit comprises the second voltage stabilizing circuit.Described the second voltage stabilizing circuit comprises the first resistance R 1 and the 4th parallel circuits; One end of described the first resistance R 1 is connected with one end of anodic bonding described the first diode D1 with described the 3rd capacitor C 3; The other end of described the first resistance R 1 is connected with the 4th parallel circuits; Described the 4th parallel circuits ground connection;
Described the 4th parallel circuits comprises the 4th capacitor C 4, the 5th capacitor C 5 and the second controllable silicon diode circuit of voltage regulation; Described the 4th capacitor C 4, the 5th capacitor C 5 and the second controllable silicon diode circuit of voltage regulation parallel connection; Described the second controllable silicon diode circuit of voltage regulation comprises the second controllable silicon voltage stabilizing didoe U3, the second resistance R 2 and the 3rd resistance R 3; The two ends of described the second resistance R 2 are connected with grid and the negative electrode of described the second controllable silicon voltage stabilizing didoe U3 respectively; The two ends of described the 3rd resistance R 3 respectively with grid and the anodic bonding of described the second controllable silicon voltage stabilizing didoe U3.
The first resistance R 1 is for adjusting to the output negative pressure value of voltage-multiplying circuit the setting voltage value of negative pressure regulating circuit.But only have the first resistance R 1 can not guarantee the accuracy of setting voltage value of the negative pressure regulating circuit obtaining and stable, and along with the attenuating of the utilization voltage of electronic device, electronic device have with high requirement to the precision and stability of voltage.So, also need the voltage after the first resistance conversion further to adjust.
The method of adjusting to the further filtering of voltage, makes it more stable by the 4th capacitor C 4 and the 5th capacitor C 5.By the second resistance R 2 and the 3rd resistance R 3, the second controllable silicon voltage stabilizing didoe U3 is controlled, the magnitude of voltage that makes the two ends of the second controllable silicon voltage stabilizing didoe U3 is electronic device required voltage value.
The quantity of negative pressure regulating circuit can be adjusted according to the quantity of electronic device.As shown in Figure 6, wherein ,-VDD_1 is the output voltage values of negative pressure regulating circuit to the structure chart of an actual positive/negative-pressure generation circuit of the present embodiment.
Embodiment 4
Referring to Fig. 7 and Fig. 8, the present embodiment is the situation of embodiment 1, embodiment 2 and embodiment 3 after comprehensive, has both comprised the technical scheme of embodiment 1, comprises again the technical scheme of embodiment 2 and the embodiment 3 of some.Fig. 9 is the practical circuit diagram that the utility model comprises a malleation generation circuit, a negative voltage generating circuit, a positive voltage regulator circuit and a negative pressure regulating circuit.As shown in Figure 9, input voltage VCC is+5V(VCC_+5V), the output voltage that malleation produces circuit is+7.5V(VDD_7V5); The output voltage output voltage uncertain, positive voltage regulator circuit of negative voltage generating circuit is+5V(VDD_+5V); The output voltage of negative pressure regulating circuit is-5V(VDD_-5V).
Can be by that analogy for the situation that contains multiple malleations generation circuit, negative voltage generating circuit, positive voltage regulator circuit or negative pressure regulating circuit.
The 4th resistance R 4 and the 5th resistance R 5 are divider resistance, and the Enable Pin (enable, not shown) that VCC_+5V high level is incorporated into DC-DC by these two divider resistances enables DC-DC, makes it to start working.The 8th capacitor C 8 is filter capacitor, introduces for preventing from disturbing, and causes the Enable Pin misoperation of DC-DC.U2 is DC-DC, and work is that the mos in U2 manages continuous switch, i.e. continuous switch is held in switch output (sw, not shown).In the time that sw opens, electric current enters U2 by inductance L 7 from sw end.Now power supply charges to inductance L 7, and in the time that sw closes, inductance L 7 produces induced electromotive force by after the first voltage-stabiliser tube D3 rectification, then by producing stable 7.5v voltage after the 7th capacitor C 7 and the 8th capacitor C 8 filtering.Inductance L 7 is energy-storage travelling wave tube, and the 7th resistance R 7 and the 8th resistance R 8 are feedback resistance, when VDD_7V5 voltage is during higher or lower than+7.5v, can be fed back to duty that U2 adjusts sw and recently adjusted by the 7th resistance R 7 and the 8th resistance R 8 voltage of VDD_7V5.The first capacitor C 1 is coupling capacitance, and sw above-mentioned holds continuous switch, and the first capacitor C 1 is exactly that the level of sw end is coupled to U4.U4 and the first capacitor C 1 form voltage-multiplying circuit, produce negative voltage by U4 and the first capacitor C 1 at the first resistance R 1 place, magnitude of voltage approximately-7v, the first resistance R 1 and the 9th resistance R 9 are current-limiting resistance; The second resistance R 2 and the 3rd resistance R 3 are feedback resistance, VDD_-5v Voltage Feedback are adjusted to the voltage of VDD_-5v to U3.The tenth resistance R the 10 and the 11 resistance R 11 is feedback resistance, VDD_+5v Voltage Feedback is adjusted to the voltage of VDD_+5v to U1; The 4th capacitor C 4, the 5th capacitor C 5, the 9th capacitor C 9 and the tenth capacitor C 10 are filter capacitor.
Malleation of the present utility model produces the quantity of circuit, negative voltage generating circuit, positive voltage regulator circuit or negative pressure regulating circuit and can adjust according to the quantity of electronic device, produces the range of application of circuit to improve positive/negative-pressure of the present utility model; Each device that positive/negative-pressure of the present utility model produces in circuit can keep in repair separately or replace, and has saved production cost, has reduced maintenance difficulty.The utility model, for current condition, utilizes common DC-DC transducer U2 to realize positive/negative-pressure, and without expensive integrated IC, has improved the market competitiveness.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit protection range of the present utility model.All any modifications of doing, be equal to replacement, improvement etc. within spirit of the present utility model and principle, be all included in protection range of the present utility model.
Claims (10)
1. positive/negative-pressure produces a circuit, for input voltage being converted into the voltage of setting; It is characterized in that, described positive/negative-pressure produces circuit and comprises:
Energy transfer circuit, the electric energy producing for transmitting input voltage;
Malleation produces circuit, for described electric energy being converted to positive voltage value by DC-DC transducer;
Negative voltage generating circuit, for being converted to negative value by described electric energy.
2. positive/negative-pressure according to claim 1 produces circuit, it is characterized in that, described energy transfer circuit comprises inductance.
3. positive/negative-pressure according to claim 1 produces circuit, it is characterized in that, described malleation produces circuit and also comprises malleation change-over circuit, wherein:
Described malleation change-over circuit comprises the first voltage-stabiliser tube and the first parallel circuits; The anode of described the first voltage-stabiliser tube is connected with described energy transfer circuit; The negative electrode of described the first voltage-stabiliser tube is connected with one end of described the first parallel circuits; The other end ground connection of described the first parallel circuits;
Described the first parallel circuits comprises the first resistance circuit, the 7th electric capacity and the 8th electric capacity; Described the first resistance circuit, the 7th electric capacity and the 8th Capacitance parallel connection;
Described the first resistance circuit comprises the 7th resistance and the 8th resistance; Described the 7th resistance and the series connection of the 8th resistance.
4. positive/negative-pressure according to claim 3 produces circuit, it is characterized in that, described malleation produces circuit and also comprises feedback circuit, wherein:
One end of described feedback circuit is connected with the feedback interface of described DC-DC transducer; The other end of described feedback circuit is connected with one end of close described the 8th resistance of described the 7th resistance.
5. produce circuit according to the positive/negative-pressure described in any one in claim 1 to 4, it is characterized in that, described malleation produces circuit and also comprises drive circuit, wherein:
Described drive circuit comprises the 4th resistance and the second parallel circuits; Described input voltage is accessed in one end of described the 4th resistance, and the other end of described the 4th resistance is connected with one end of described the second parallel circuits; The other end ground connection of described the second parallel circuits; The control port of described DC-DC transducer is connected with one end of close described second parallel circuits of described the 4th resistance;
Described the second parallel circuits comprises the 5th resistance and the 6th electric capacity; Described the 5th resistance and the 6th Capacitance parallel connection.
6. positive/negative-pressure according to claim 5 produces circuit, it is characterized in that, described negative voltage generating circuit comprises voltage-multiplying circuit, wherein:
Described voltage-multiplying circuit comprises the first electric capacity, diode circuit, the second electric capacity and the 3rd electric capacity; Described the second electric capacity and the 3rd electric capacity are in parallel with described diode circuit respectively;
Described diode circuit comprises the first diode and the second diode; The anodic bonding of the negative electrode of described the first diode and the second diode; The minus earth of described the second diode; One end of described the first electric capacity is connected with described energy transfer circuit; The other end of described the first electric capacity is connected with the negative electrode of the first diode.
7. positive/negative-pressure according to claim 6 produces circuit, it is characterized in that, described positive/negative-pressure produces circuit and also comprises positive voltage regulator circuit, for described positive voltage value is adjusted.
8. positive/negative-pressure according to claim 7 produces circuit, it is characterized in that, described positive voltage regulator circuit comprises the first voltage stabilizing circuit, wherein:
Described the first voltage stabilizing circuit comprises the 9th resistance and the 3rd parallel circuits; One end of described the 9th resistance is connected with the negative electrode of described the first voltage-stabiliser tube; The other end of described the 9th resistance is connected with one end of the 3rd parallel circuits; The other end ground connection of described the 3rd parallel circuits;
Described the 3rd parallel circuits comprises the 9th electric capacity, the tenth electric capacity and the first controllable silicon diode circuit of voltage regulation; Described the 9th electric capacity, the tenth electric capacity and the first controllable silicon diode circuit of voltage regulation parallel connection;
Described the first controllable silicon diode circuit of voltage regulation comprises the first controllable silicon voltage stabilizing didoe, the tenth resistance and the 11 resistance; The two ends of described the tenth resistance are connected with grid and the negative electrode of described the first controllable silicon voltage stabilizing didoe respectively; The two ends of described the 11 resistance respectively with grid and the anodic bonding of described the first controllable silicon voltage stabilizing didoe.
9. positive/negative-pressure according to claim 8 produces circuit, it is characterized in that, described positive/negative-pressure produces circuit and also comprises negative pressure regulating circuit, for described negative value is adjusted.
10. positive/negative-pressure according to claim 9 produces circuit, it is characterized in that, described negative pressure regulating circuit comprises the second voltage stabilizing circuit, wherein:
Described the second voltage stabilizing circuit comprises the first resistance and the 4th parallel circuits; One end of described the first resistance is connected with one end of anodic bonding described the first diode with described the 3rd electric capacity; The other end of described the first resistance is connected with the 4th parallel circuits; Described the 4th parallel circuits ground connection;
Described the 4th parallel circuits comprises the 4th electric capacity, the 5th electric capacity and the second controllable silicon diode circuit of voltage regulation; Described the 4th electric capacity, the 5th electric capacity and the second controllable silicon diode circuit of voltage regulation parallel connection;
Described the second controllable silicon diode circuit of voltage regulation comprises the second controllable silicon voltage stabilizing didoe, the second resistance and the 3rd resistance; The two ends of described the second resistance are connected with grid and the negative electrode of described the second controllable silicon voltage stabilizing didoe respectively; The two ends of described the 3rd resistance respectively with grid and the anodic bonding of described the second controllable silicon voltage stabilizing didoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320712437.9U CN203645539U (en) | 2013-11-12 | 2013-11-12 | Positive and negative voltage generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320712437.9U CN203645539U (en) | 2013-11-12 | 2013-11-12 | Positive and negative voltage generation circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203645539U true CN203645539U (en) | 2014-06-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320712437.9U Expired - Lifetime CN203645539U (en) | 2013-11-12 | 2013-11-12 | Positive and negative voltage generation circuit |
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| CN (1) | CN203645539U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607113A (en) * | 2013-11-12 | 2014-02-26 | 青岛歌尔声学科技有限公司 | Positive and negative voltage generation circuit |
| CN109949774A (en) * | 2019-04-24 | 2019-06-28 | 晶晨半导体(上海)股份有限公司 | A kind of circuit obtaining second level negative pressure |
-
2013
- 2013-11-12 CN CN201320712437.9U patent/CN203645539U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607113A (en) * | 2013-11-12 | 2014-02-26 | 青岛歌尔声学科技有限公司 | Positive and negative voltage generation circuit |
| CN109949774A (en) * | 2019-04-24 | 2019-06-28 | 晶晨半导体(上海)股份有限公司 | A kind of circuit obtaining second level negative pressure |
| CN109949774B (en) * | 2019-04-24 | 2022-01-21 | 晶晨半导体(上海)股份有限公司 | Circuit for acquiring secondary negative voltage |
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Granted publication date: 20140611 |