CN201388161Y - Power supply voltage regulating circuit and tuner feed circuit using same - Google Patents
Power supply voltage regulating circuit and tuner feed circuit using same Download PDFInfo
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- CN201388161Y CN201388161Y CN200920024184U CN200920024184U CN201388161Y CN 201388161 Y CN201388161 Y CN 201388161Y CN 200920024184 U CN200920024184 U CN 200920024184U CN 200920024184 U CN200920024184 U CN 200920024184U CN 201388161 Y CN201388161 Y CN 201388161Y
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Abstract
The utility model discloses a power supply voltage regulating circuit and a tuner feed circuit using same. The power supply voltage regulating circuit comprises a power input end and a voltage regulating module. The voltage regulating module can convert the input power with the voltage within certain range; the input end of the voltage regulating module is connected with the power input end to convert the input power led in through the power input end to voltage needed by a latter circuit; and the voltage is output through the output end of the voltage regulating module to provide power for the latter circuit. The power supply voltage regulating circuit can adapt to various working environments and can realize stabilized voltage output for power supply circuits from different working occasions. The power supply voltage regulating circuit is simple in structure, small in volume and strong in anti-jamming property and is applicable in a portable digital-analog integrated unit or on an on-vehicle digital-analog integrated unit and the like.
Description
Technical field
The utility model belongs to the power circuit technical field, specifically, relates to a kind of power supply stabilization circuit and uses described power supply stabilization circuit and the tuner feed circuit that designs.
Background technology
Present television set is owing to components and parts set on its inner mainboard are more, different components and parts often need different operating voltages, therefore, power circuit need be set and realize importing power supply in television set to the conversion between the required operating voltage of each components and parts.Such as present Core of TV set, its standard operation voltage is generally 12V, and other parts of television set inside, for example standby voltage is generally 5V, and the operating voltage of satellite antenna tuner is generally 20V.So television set is inner can to boost accordingly according to the 12V voltage of input or the step-down processing.The effect of step-down part mainly is that 12V voltage is reduced to 5V or 3.3V, is the power supply of functional modules such as audio/video decoding chip or memory; The part of boosting then mainly is that 12V voltage is risen to 20V, is used for carrying out feed to the tuner of satellite antenna.
General household voltage all is an alternating current 220V, therefore, always an adapter is set in that television set is inner, is used for electric main with 220V to be adapted to+direct voltage of 12V, and coming provides stable standard operation voltage for Core of TV set.
Along with starting broadcasting of radio satellite TV, increasing television set portion within it is provided with corresponding wireless receiving module, so just can be in outdoor reception radio satellite TV signal.If at outdoor application large scale mobile television, generally can use the cigar lighter socket of vehicle power to carry out power taking.Because vehicle power is not very stable, and each chassis live source all has particularity, the voltage that sends is also unstable, therefore, need in the electric power system of television set inside, design complicated level shifting circuit and mate different input power supplys, and what finally the volume of the power circuit that forms also must be enough is little, to adapt to the confined space of portable television inside.Thereby, cause design difficulty big, problems such as cost height.
The utility model content
The purpose of this utility model has been to provide a kind of power supply stabilization circuit that can adapt to the different operating environment, to realize the stable conversion output to difference input power supply.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of power supply stabilization circuit, comprise power input and Voltage stabilizing module, described Voltage stabilizing module can be changed the input power supply in the certain voltage scope, its input connects described power input, the input power source conversion that to introduce by described power input is that the required voltage of late-class circuit is exported by its output, is the late-class circuit power supply.
In order to make described power supply stabilization circuit can adapt to different operational environments better, preferred employing can support the Voltage stabilizing module of broad input power range to design, such as adopting the input power range between 9～36V, output voltage is that the Voltage stabilizing module of 12V designs.
Further; described power input includes a diode at least by the input of protective circuit connection Voltage stabilizing module in described protective circuit, the anode of diode connects power input; negative electrode connects the input of Voltage stabilizing module, to prevent power supply reversal connection, short circuit or wrong.
Further again, on the input of described Voltage stabilizing module and output, all be connected with filter circuit, with filtering interference signals.
Further again, for the power interface of the electric equipment that designs adopting described voltage stabilizing circuit is designed for uniformity, so that this electric equipment can be conveniently used in various occasions, described power input is arranged on the housing of equipment, and the power supply wiring that is equipped with two covers to be connected with its selection; Wherein a cover power supply wiring is used to connect the external communication power supply, and is provided with adapter in this power supply wiring; Another set of power supply wiring is used to connect outside direct current supply.
Based on above-mentioned power supply stabilization circuit structure, the utility model also provides a kind of designed satellite antenna tuner feed circuit of described power supply stabilization circuit that adopts, with the DC power supply of power supply stabilization circuit voltage stabilizing output by booster circuit boost handle after, generate the required direct current supply of satellite antenna tuner, such as+20V, for the satellite antenna tuner provides operating voltage, thereby provide under the prerequisite of stable DC feed in assurance, simplified circuit construction of electric power, reduce the power panel volume, made things convenient for the global design of equipment.
Further, in described booster circuit, include a PWM controller, its power input connects the output of Voltage stabilizing module, generate the control end that pwm signal exports a switching circuit to, switch passage one end of described switching circuit connects the output of Voltage stabilizing module, the other end connects storage capacitor by inductance, and then is connected with the feeder ear of tuner, and connects the feedback end of PWM controller by bleeder circuit.
Further again, in order to guarantee the circulating direction of supply current, between described inductance and storage capacitor, also be connected with a diode that prevents current reflux.
Compared with prior art, advantage of the present utility model with good effect is: power supply stabilization circuit of the present utility model can adapt to different operational environments, for can realize voltage stabilizing output from the power supply of different operating occasion, circuit structure is simple, volume is little, antijamming capability is strong, is adapted at applying in the products such as portable integrated analog/digital equipment or vehicle-mounted integrated analog/digital equipment.
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 circuit theory diagrams of a kind of embodiment of the power supply stabilization circuit that proposes of the utility model;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of booster circuit in the tuner feed circuit that proposes of the utility model;
Fig. 3 is the schematic block circuit diagram of a kind of embodiment of power interface.
Embodiment
Below in conjunction with accompanying drawing specific embodiment of the utility model is described in detail.
Power supply stabilization circuit of the present utility model adopts the input power supply can support that the Voltage stabilizing module of relative broad range comes the input power supply is changed output, thereby when assurance provides its required operating voltage for late-class circuit, can improve the adaptive capacity of power supply stabilization circuit, to widen the application scenario of equipment.
Elaborate the concrete composition structure and the course of work thereof of described power supply stabilization circuit below by a specific embodiment.
Embodiment one, and referring to shown in Figure 1, in the present embodiment, it is the Voltage stabilizing module N1 realization of 12V at 9～36V, output voltage that Voltage stabilizing module can specifically adopt an input power range.The outside input power supply that provides is provided power input, connects the input Vin+ of Voltage stabilizing module N1 through a protective circuit.For the High-frequency Interference of sneaking in the filtering input power supply, between the input Vin+ of described Voltage stabilizing module N1 and ground, also be parallel with filter capacitor C4, C6.After described Voltage stabilizing module N1 carried out the voltage stabilizing processing to the input power supply that receives, generation+12V direct voltage was exported to late-class circuit by its output end vo ut+, for late-class circuit provides stable+12V direct-current working volts.Described late-class circuit can be the load circuit of any needs+12V direct current supply, such as movement circuit of television set etc.For further regulated output voltage, between the output end vo ut+ of described Voltage stabilizing module N1 and ground, be parallel with two-way filter capacitor C2, C5 equally, with all interference signals in the filter out power circuit, guaranteeing provides pure power supply for late-class circuit.
Certainly, described Voltage stabilizing module can adopt other integrated chip or the modular circuit with different input and output voltage scopes except that above-mentioned Voltage stabilizing module N1 to realize equally, can look the actual needs of circuit and specifically select.
In the present embodiment; the purpose that protective circuit is set is in order to prevent to import faults such as power supply reversal connection, short circuit or wrong; in case generation the problems referred to above; protective circuit can be cut off the flow cycle of input power supply to subsequent conditioning circuit automatically; so that Voltage stabilizing module N1 and capacitor C 5, C6 are protected; avoid capacitor C 5, explosion takes place because of having loaded reverse voltage in C6, and also can play a very good protection to back-end circuit.In the present embodiment, the described protective circuit form that can adopt at least one diode to be connected between the input Vin+ of power input and Voltage stabilizing module N1 makes up.To adopt two diode VD1, VD2 is example, and as shown in Figure 1, after two diode VD1, VD2 parallel connection, anode connects power input, and negative electrode connects the input Vin+ of Voltage stabilizing module N1.When the input power supply generation reversal connection, short circuit or the wrong that are connected power input etc. were wrong, diode VD1, VD2 oppositely ended, thereby cut off input power supply, protection Voltage stabilizing module N1 and late-class circuit.
Certainly, described protective circuit also can adopt present existing other multiple circuit of overvoltage, overcurrent protection function of realizing to substitute, and present embodiment is not limited in above giving an example.
Consider a kind of special circumstances, promptly import the required operating voltage of power supply and late-class circuit when identical, such as input power source voltage value is 12V, and then the required operating voltage of level circuit exactly also is 12V, is exactly the direct-current working volts that need 12V such as Core of TV set.When running into this situation, do not need the input power source voltage to be changed promptly can be the late-class circuit power supply by Voltage stabilizing module.Therefore, can between the input Vin+ of Voltage stabilizing module N1 and output end vo ut+, be connected a switching circuit, as shown in Figure 1, conducting when the input power supply is identical with the required operating voltage of late-class circuit, utilizing the input power supply directly is that late-class circuit is powered; And when input power supply and the required operating voltage of late-class circuit are inequality, end, utilize Voltage stabilizing module N1 that the input power supply is changed after, generate the required operating voltage of late-class circuit, export back grade to.
For the economize on hardware cost, when equipment has been known this equipment its input power supply when identical with the required operating voltage of late-class circuit in use in the future in process of production, then can be in the process of source of welding current plate, do not weld Voltage stabilizing module N1, but on the solder joint of the input Vin+ of desire welding Voltage stabilizing module N1 and output end vo ut+, is connected inductance FB1, FB2 and the FB3 of parallel connection, after the filter circuit that the input power supply is formed via capacitor C 4, C6, C2, C5 and inductance FB1, FB2, FB3 is handled, directly export late-class circuit to, be its power supply.Adopt this power panel design can greatly improve the compatibility and the versatility of power supply pcb board, promptly can be by the different components and parts of welding on same pcb board, such as selecting welding voltage stabilizing chip or inductance etc., satisfy the power demands of variety classes late-class circuit.
In the present embodiment, described inductance FB1, FB2 and FB3 can specifically select for use the magnetic bead inductance to realize.
Certainly, also can adopt lead directly to be connected across between the input Vin+ and output end vo ut+ of Voltage stabilizing module N1, utilize capacitor C 4, C6, C2,5 pairs of inputs of C power supply to carry out filtering, can provide stable operating voltage for late-class circuit equally.
Present embodiment is not limited to above giving an example to the concrete composition structure of switching circuit.
When the needed operating voltage of some functional module in the late-class circuit is different from the direct voltage of power supply stabilization circuit output, such as being the power supply of Core of TV set plate by power supply stabilization circuit output+12V direct voltage, and on the Core of TV set plate, also be provided with needs+5V or+during functional modules such as the audio/video decoding chip of 3.3V or memory, then need on the Core of TV set plate reduction voltage circuit be set and realize+the 12V direct voltage to+5V or+step-down conversion between the 3.3V voltage.And for the tuner of satellite antenna, the operating voltage of needs+20V usually, also need this moment to be provided with booster circuit come to power supply stabilization circuit export+the 12V direct voltage carries out boosting inverter.
Power supply stabilization circuit shown in Figure 1 is applied in the design of tuner feed circuit, it will be more obvious that its voltage regulation result reaches the effect that improves feed circuit adaptability aspect.
Be example below with the television set, elaborate the concrete composition structure and the operation principle thereof of described tuner feed circuit by a specific embodiment.
Embodiment two, in the present embodiment, at first adopt the required operating voltage of power supply stabilization circuit output Core of TV set plate shown in Figure 1, such as+the 12V direct voltage; Then, exporting described+12V direct voltage to a booster circuit ,+12V direct voltage boosting inverter is become the required operating voltage of tuner of satellite antenna, such as+20V, export the power end of satellite antenna tuner to, is the tuner power supply.
Fig. 2 is the circuit theory diagrams of a kind of embodiment of booster circuit, comprises chief components such as a PWM controller U801, switching circuit and inductance L 802 and storage capacitor C809.Wherein, the power input VIN of PWM controller U801 connects the output of voltage stabilizing circuit through filter capacitor C802, the output of reception voltage stabilizing circuit+the 12V direct voltage, be its power supply, and then generate pwm signal with certain duty ratio and export the control end of switching circuit to by its DRV terminal, with the switching frequency of control switch circuit.Switch passage one end of described switching circuit connects the output of voltage stabilizing circuit, reception+12V direct voltage, the other end connects storage capacitor C809 by inductance L 802, and then is connected with the feeder ear of tuner, and connects the feedback end FB of PWM controller U801 by bleeder circuit.Described PWM controller U801 determines the duty ratio of the pwm signal of its output according to the feedback voltage that receives, the switching frequency that is used for the by-pass cock circuit, and then regulate the cathode voltage of storage capacitor C809 by the switching frequency that changes switching circuit, make it that stable+20V direct voltage can be provided, export to the feeder ear of satellite antenna tuner.
In the present embodiment, described switching circuit can specifically adopt two metal-oxide-semiconductor chip Q801 to realize, as shown in Figure 2.The grid G 1 of described couple of metal-oxide-semiconductor chip Q801 connects the DRV terminal of PWM controller U801, drain D 1 connects the output of voltage stabilizing circuit by resistance R 801, reception+12V direct voltage, source S 1 is on the one hand by filter capacitor C804 ground connection, connect storage capacitor C809 by inductance L 802 through diode D803 on the other hand, and then through filter capacitor C808 conversion is generated+after the 20V direct voltage carries out Filtering Processing, export the tuner of satellite antenna to.Described diode D803 is connected between inductance L 802 and the storage capacitor C809, can guarantee the circulating direction of electric current, anti-backflow.
Resistance R 803, R804 form bleeder circuit and are connected between the connected node and ground of diode D803 and storage capacitor C809, the direct voltage of booster circuit output is sampled after the voltage division processing, export the feedback end FB of PWM controller U801 to, and then with PWM controller U801 in reference voltage compare after, determine the duty ratio of the pwm signal of PWM controller U801 output according to comparative result.
Certainly, described booster circuit also can adopt present existing DC boosting chip or modular circuit to set up and form, and present embodiment is not limited thereto.
For the power interface of the electric equipment that designs adopting described power supply stabilization circuit is designed for uniformity, so that this electric equipment can be conveniently used in various occasions.In the present embodiment, the form of described power input with socket or plug is arranged on the housing of electric equipment, on the back casing such as television set, and be equipped with the power supply wiring that two covers can be connected with its selection for it, as shown in Figure 3, wherein a cover power supply wiring is used to connect the external communication power supply, such as the 220V electric main in the user family, and an adapter is set in this power supply wiring, be used for ac high-voltage is converted to dc low-voltage, transfer in the power supply stabilization circuit shown in Figure 1 by described power input.Another set of power supply wiring is used to connect outside direct current supply, such as vehicle power, can directly transfer in the power supply stabilization circuit shown in Figure 1 by described power input.So, the user only needs to select to connect the power demands that different power supply wirings can satisfy equipment according to concrete application scenario when this equipment of use.During such as TV reception at home, can select to connect the first cover power supply wiring and peg graft on the AC socket in getting home, utilize electric main to power for television set; And in the open air during TV reception, then can select to connect the second cover power supply wiring is plugged into and carries out power taking on the vehicle-mounted cigar lighter socket, utilize vehicle-mounted direct current supply to provide working power for television set, even the vehicle power instability also can operate as normal, thereby has significantly improved the adaptive capacity of tv product to the workplace.
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 kind of power supply stabilization circuit, it is characterized in that: comprise power input and Voltage stabilizing module, the module of described Voltage stabilizing module for changing the input power supply in the certain voltage scope, its input connects described power input, and the input power source conversion that will introduce by described power input is that the required voltage of late-class circuit is by its output output.
2, power supply stabilization circuit according to claim 1; it is characterized in that: described power input connects the input of Voltage stabilizing module by a protective circuit; in described protective circuit, include a diode at least; the anode of diode connects power input, and negative electrode connects the input of Voltage stabilizing module.
3, power supply stabilization circuit according to claim 1 is characterized in that: all be connected with filter circuit on the input of described Voltage stabilizing module and output.
4, power supply stabilization circuit according to claim 1 is characterized in that: described Voltage stabilizing module is changed the input power supply between 9～36V, generates 12V voltage by its output output.
5, according to each described power supply stabilization circuit in the claim 1 to 4, it is characterized in that: described power input is arranged on the housing of equipment, and the power supply wiring that is equipped with two covers to be connected with its selection; Wherein a cover power supply wiring is used to connect the external communication power supply, and is provided with adapter in this power supply wiring; Another set of power supply wiring is used to connect outside direct current supply.
6, a kind of tuner feed circuit, it is characterized in that: comprise power input, Voltage stabilizing module and booster circuit, wherein, the module of described Voltage stabilizing module for changing the input power supply in the certain voltage scope, its input connects described power input, the input power source conversion that to introduce by described power input is the required voltage output of late-class circuit, its output connects booster circuit, the voltage transitions of described Voltage stabilizing module being exported by booster circuit becomes the required working power of tuner, is the tuner feed.
7, tuner feed circuit according to claim 6; it is characterized in that: described power input connects the input of Voltage stabilizing module by a protective circuit; in described protective circuit, include a diode at least; the anode of diode connects power input, and negative electrode connects the input of Voltage stabilizing module.
8, tuner feed circuit according to claim 6, it is characterized in that: in described booster circuit, include a PWM controller, its power input connects the output of Voltage stabilizing module, generate the control end that pwm signal exports a switching circuit to, switch passage one end of described switching circuit connects the output of Voltage stabilizing module, the other end connects storage capacitor by inductance, and then is connected with the feeder ear of tuner, and connects the feedback end of PWM controller by bleeder circuit.
9, tuner feed circuit according to claim 8 is characterized in that: be connected with a diode that prevents current reflux between described inductance and storage capacitor.
10, according to each described tuner feed circuit in the claim 6 to 9, it is characterized in that: described power input is arranged on the housing of equipment, and the power supply wiring that is equipped with two covers to be connected with its selection; Wherein a cover power supply wiring is used to connect the external communication power supply, and is provided with adapter in this power supply wiring; Another set of power supply wiring is used to connect outside direct current supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920024184U CN201388161Y (en) | 2009-03-26 | 2009-03-26 | Power supply voltage regulating circuit and tuner feed circuit using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920024184U CN201388161Y (en) | 2009-03-26 | 2009-03-26 | Power supply voltage regulating circuit and tuner feed circuit using same |
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| Publication Number | Publication Date |
|---|---|
| CN201388161Y true CN201388161Y (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200920024184U Expired - Fee Related CN201388161Y (en) | 2009-03-26 | 2009-03-26 | Power supply voltage regulating circuit and tuner feed circuit using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322649A (en) * | 2014-07-29 | 2016-02-10 | 英飞凌科技股份有限公司 | Sensor with micro break compensation |
| CN109037960A (en) * | 2018-08-10 | 2018-12-18 | 宁波耀德成智能科技有限公司 | Satellite antenna tuner polarizing voltage adjusts device |
-
2009
- 2009-03-26 CN CN200920024184U patent/CN201388161Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322649A (en) * | 2014-07-29 | 2016-02-10 | 英飞凌科技股份有限公司 | Sensor with micro break compensation |
| US9778325B2 (en) | 2014-07-29 | 2017-10-03 | Infineon Technologies Ag | Sensor with micro break compensation |
| US10048327B2 (en) | 2014-07-29 | 2018-08-14 | Infineon Technologies Ag | Sensor with micro break compensation |
| CN105322649B (en) * | 2014-07-29 | 2019-06-14 | 英飞凌科技股份有限公司 | Sensor with microinterrupt compensation |
| CN109037960A (en) * | 2018-08-10 | 2018-12-18 | 宁波耀德成智能科技有限公司 | Satellite antenna tuner polarizing voltage adjusts device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20130326 |