CN207664875U - A kind of LNB polarization power supplies power-supplying circuit - Google Patents
A kind of LNB polarization power supplies power-supplying circuit Download PDFInfo
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- CN207664875U CN207664875U CN201820064310.3U CN201820064310U CN207664875U CN 207664875 U CN207664875 U CN 207664875U CN 201820064310 U CN201820064310 U CN 201820064310U CN 207664875 U CN207664875 U CN 207664875U
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Abstract
A kind of LNB polarization power supplies power-supplying circuit, which is characterized in that including：For being exported after being depressured input voltage, and the DC DC voltage reduction modules of output voltage can be adjusted according to feedback voltage；The feedback voltage for connecting DC DC voltage reduction modules and changeable feedback voltage adjusts circuit；For adjusting the controller that circuit sends adjusting control signal to feedback voltage.It is carried out using DC DC decompressions mode, realizes that the input/output port by controller changes DC DC chips output voltages to select the voltage of required LNB power supplies, realize that LNB voltages are adjustable in satellite communication.
Description
Technical field
It is especially related with a kind of LNB polarization power supplies power-supplying circuit the utility model is related to antenna LNB power supplies.
Background technology
In LNB power supply plans used at present, the integrated programme of LNB supply voltages can be selected nearly all by software
It is to be carried out in such a way that DC-DC chips boost, 13-18V is boosted to from 12V.And in satellite communication system, equipment input
DC voltage is often higher than 12V (such as -48V, 24V).If continuing to use existing boost approach, need input voltage
It is first depressured to 12V, then carries out boosting to 13-18V or even 21V, in this way, power-efficient will substantially reduce.Therefore the boosting mode
LNB adjustable voltage power supply plans be not suitable for high voltage supply satellite communication system.And existing satellite communication system is supplied to LNB
The mode overwhelming majority of electricity is the mode of fixed voltage power supply.
Utility model content
For above-mentioned prior art deficiency, the utility model provides a kind of LNB polarization power supplies power-supplying circuit, uses
DC-DC decompressions mode carries out, and it is required to select to realize that the input/output port by controller changes DC-DC chips output voltage
The voltage of LNB power supplies realizes that LNB voltages are adjustable in satellite communication.
In order to realize the purpose of this utility model, intend using following technology：
A kind of LNB polarization power supplies power-supplying circuit, which is characterized in that including：After input voltage is depressured
Output, and the DC-DC voltage reduction modules of output voltage can be adjusted according to feedback voltage；It connects DC-DC voltage reduction modules and can be changed anti-
The feedback voltage of feedthrough voltage adjusts circuit；For adjusting the controller that circuit sends adjusting control signal to feedback voltage.
Wherein：The DC-DC voltage reduction modules include：DC-DC chips and the inductance for being connected to its SW foot；DC-DC chips
Vin feet connection input voltage, EN feet connection chip controls signal, FB feet connection feedback voltage adjust circuit, GND feet ground connection.
Wherein, the feedback voltage adjusting circuit includes：It is parallel between the output end of DC-DC voltage reduction modules and feedback foot
Fixed resistance；Several between being parallel to the feedback foot of DC-DC voltage reduction modules and being grounded are respectively by the different IO of controller
The regulation resistance of mouth control.
Wherein, the controller be can by control its I/O port control to adjust resistance eutral grounding or hanging MCU or
CPU。
Further, it is equipped with connection I/O port between regulation resistance and ground connection and the conduct electrons for responding I/O port control signal are opened
It closes.
Further, the conduct electrons switch is metal-oxide-semiconductor or triode or analog switch.
The utility model has the beneficial effects that：
Change the ground connection resistance of DC-DC chip feedback pins by the input/output port (I/O port) of controller (MCU, CPU etc.)
Value to change DC-DC chip feedback voltages, and then changes the mode of output voltage to select the side of required LNB supply voltages
Case；
It has the advantages of simple structure and easy realization and software is accessed by device in order to control, you can be changed by way of software selection
The output voltage of LNB is controlled using controller input/output port (I/O port), without being adjusted on hardware circuit；
Mode is depressured using DC-DC, meets most of satellite communication system demand.
Description of the drawings
Fig. 1 is the utility model overall structure diagram.
Fig. 2 is the utility model control flow chart.
Fig. 3 is one circuit structure diagram of the utility model embodiment.
Fig. 4 is two circuit structure diagram of the utility model embodiment.
Specific implementation mode
As shown in Figure 1, a kind of LNB polarization power supplies power-supplying circuit, including：For defeated after being depressured input voltage
Go out, and the DC-DC voltage reduction modules of output voltage can be adjusted according to feedback voltage；Connect DC-DC voltage reduction modules and changeable feedback
The feedback voltage of voltage adjusts circuit；For adjusting the controller that circuit sends adjusting control signal to feedback voltage.
DC-DC voltage reduction modules include：DC-DC chips and the inductance for being connected to its SW foot；The Vin feet of DC-DC chips connect
It connects input voltage, EN feet connection chip controls signal, FB feet connection feedback voltage and adjusts circuit, GND feet ground connection.DC-DC chips
To be depressured chip, internal clock frequencies are fixed.Input voltage is after DC-DC chips, and the power tube of chip interior is when internal
Under clock frequency and the collective effect of logic circuit, frequent either on or off, when the either on or off of power tube reaches balance, inductance
The output voltage on right side is less than input voltage, and then reaches the function of decompression.
Output voltage acts on feedback voltage and adjusts on circuit, and feedback voltage adjusts circuit and feedback voltage is fed back to DC-
On DC chips, portion such as is compared at the logical process in the chip, and then changes the size of output voltage.Feedback voltage adjusts circuit
Including：The fixed resistance being parallel between the output end of DC-DC voltage reduction modules and feedback foot；It is parallel to DC-DC voltage reduction modules
Feed back several regulation resistances controlled respectively by the different I/O ports of controller between foot and ground connection.Controller is that can pass through
Its I/O port is controlled to control to adjust resistance eutral grounding or hanging MCU or CPU.Regulation resistance is grounded, then participate in resistance and
Online is calculated, and the size of parallel resistance influences the size of feedback voltage.Regulation resistance is hanging, then is not involved in calculating, does not work.It is logical
Software access controller is crossed, control I/O port control resistance eutral grounding or hanging to change the size of parallel resistance, and then changes anti-
Feedthrough voltage, and then realize the change of output voltage.Specific control flow is as shown in Figure 2.
It, as a preferred embodiment, can be between regulation resistance and ground connection if the I/O port of controller does not have high-impedance state
Connection I/O port is set and responds the conduct electrons switch of I/O port control signal, metal-oxide-semiconductor or triode may be selected in conduct electrons switch.
Pass through and control metal-oxide-semiconductor and be turned on and off, you can it is ground connection or hanging to control to adjust resistance.
As shown in figure 3, for another embodiment of the utility model, embodiment one.
A kind of LNB polarization power supplies power-supplying circuit, including：For being exported after being depressured input voltage, and can root
The DC-DC voltage reduction modules of output voltage are adjusted according to feedback voltage；Connect the feedback of DC-DC voltage reduction modules and changeable feedback voltage
Voltage regulator circuit；For adjusting the controller that circuit sends adjusting control signal to feedback voltage.DC-DC voltage reduction module packets
It includes：DC-DC chips and the inductance for being connected to its SW foot；Vin feet connection input voltage, the EN feet of DC-DC chips connect chip
Control signal, FB feet connection feedback voltage adjusts circuit, GND feet ground connection.
Feedback voltage adjusts circuit：The resistance R1 being parallel between the ends b of inductance and the FB feet of DC-DC chips；And
Resistance R2, resistance R3, the resistance R4 being coupled between the FB feet of DC-DC chips and ground connection；Connection is equipped between resistance R3 and ground connection
The conduct electrons that connection another I/O port of controller is equipped between conduct electrons the switch Q1, resistance R4 and ground connection of controller I/O port are opened
Close Q2.Specifically, conduct electrons switch Q1 and conduct electrons switch Q2 is metal-oxide-semiconductor.Controller is can be by controlling its I/O port
To control the MCU or CPU of metal-oxide-semiconductor conducting.
DC-DC chips select MP2452, and buck functionality, resistance R1, resistance R2, resistance R3 and electricity are realized together with inductance
It hinders R4 and constitutes feedback voltage adjusting circuit, metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2 match hop controller, form software output control circuit.
The switching frequency of DC-DC chips is fixed, and output voltage is adjustable, and different voltage is exported by the variation of feedback voltage
Value.When adjusting feedback voltage, resistance R1 is fixed, changes the resistance value in parallel of resistance R2, resistance R3 and resistance R4, you can obtain
Different output voltages.Metal-oxide-semiconductor conducting is so driven by the I/O port of controller, then resistance R3 or R4 ground connection, after resistor coupled in parallel
Resistance value changes, and then changes output voltage；When controller I/O port control metal-oxide-semiconductor is closed, R3 or R4 are in hanging shape
State, output voltage are default voltage.
Output voltage and feedback voltage and sensitivity are as shown in formula 1, agreement：Output voltage is V0, feedback voltage
It is depressured chip for Vfb, different DC-DC, Vfb will be different, and practical ground resistance is R '.
Formula 1：V0=Vfb (R1+R')/R'
It is 13V with LNB acquiescence supply voltages, for change voltage is 18V and 21V, the working method of definition graph 4 is as follows：
1) chip controls signal is added to DC-DC chips by EN feet, so that LNB power supplies is worked under default voltage, the acquiescence
Voltage is set according to requirement in practical systems, is set as 13V herein, under default voltage, R '=R2.
If 2) software selects LNB supply voltages for 18V, controller output at this time " 18V voltage outputs control signal ",
Metal-oxide-semiconductor Q1 is set to be connected, controller does not export " 21V voltage outputs control signal ", and metal-oxide-semiconductor Q2 is made to disconnect, resistance R3 ground connection, and R4 is outstanding
Sky, R '=R2//R3, substitutes into the output voltage that formula 1 calculates and is approached with virtual voltage at this time.
If 3) software selects LNB supply voltages for 21V, controller output at this time " 21V voltage outputs control signal ",
Metal-oxide-semiconductor Q2 is set to be connected, controller does not export " 18V voltage outputs control signal ", and metal-oxide-semiconductor Q1 is made to disconnect, resistance R4 ground connection, and R3 is outstanding
Sky, R '=R2//R4, substitutes into the output voltage that formula 1 calculates and is approached with virtual voltage at this time.
If 4) software selection LNB supply voltages are not 13V, 18V and 21V, controller can be allowed to export " 18V electricity at this time
Pressure output control signal ", makes metal-oxide-semiconductor Q1 be connected, while controller output " 21V voltage outputs control signal ", makes metal-oxide-semiconductor Q2
Conducting, resistance R3, R4 are grounded, at this time R '=R2//R3//R4, are substituted into the output voltage that formula 1 calculates and are connect with virtual voltage
Closely.
As shown in figure 4, for another embodiment of the utility model, embodiment two.It replaces implementing using analog switch
The metal-oxide-semiconductor of example one.Analog switch uses TS5A2066.The one end R3 and R4 is grounded, and the other end is separately connected the COM1 of electronic switch
With the ends COM2, analog switch connects controller and DC-DC chip feedback ends.Its specific working mode principle and one phase of embodiment
Together, it realizes the adjustment of parallel resistance resistance value by analog switch control R3 or R4 ground connection or vacantly according to control signal, realizes instead
The adjusting of feedthrough voltage, to realize that the adjusting to output voltage is not repeating herein.
If wanting to export a greater variety of voltages, increase the I/O port and parallel resistance of controller.
Claims (10)
1. a kind of LNB polarization power supplies power-supplying circuit, which is characterized in that including：
For being exported after being depressured input voltage, and the DC-DC voltage reduction modules of output voltage can be adjusted according to feedback voltage；
The feedback voltage for connecting DC-DC voltage reduction modules and changeable feedback voltage adjusts circuit；
For adjusting the controller that circuit sends adjusting control signal to feedback voltage.
2. LNB polarization power supplies power-supplying circuit according to claim 1, it is characterised in that：The DC-DC voltage reduction modules
Including：
DC-DC chips and the inductance for being connected to its SW foot；
Vin feet connection input voltage, EN feet connection chip controls signal, the FB feet connection feedback voltage of DC-DC chips adjust electricity
Road, GND feet ground connection.
3. LNB polarization power supplies power-supplying circuit according to claim 1, which is characterized in that the feedback voltage is adjusted
Circuit includes：
The fixed resistance being parallel between the output end of DC-DC voltage reduction modules and feedback foot；
Several being parallel between the feedback foot of DC-DC voltage reduction modules and ground connection are controlled by the different I/O ports of controller respectively
Regulation resistance.
4. LNB polarization power supplies power-supplying circuit according to claim 3, which is characterized in that the controller is can
Resistance eutral grounding or hanging MCU or CPU are controlled to adjust by controlling its I/O port.
5. LNB polarization power supplies power-supplying circuit according to claim 3, which is characterized in that the regulation resistance with connect
It is equipped with connection I/O port between ground and responds the conduct electrons switch of I/O port control signal.
6. LNB polarization power supplies power-supplying circuit according to claim 5, which is characterized in that the conduct electrons switch
For metal-oxide-semiconductor or triode or analog switch.
7. LNB polarization power supplies power-supplying circuit according to claim 2, which is characterized in that the feedback voltage is adjusted
Circuit includes：
The resistance R1 being parallel between the ends b of inductance and the FB feet of DC-DC chips；
Resistance R2, resistance R3, the resistance R4 being parallel between the FB feet of DC-DC chips and ground connection；
The ground terminal of resistance R3 and resistance R4 are separately connected the different I/O ports of controller.
8. LNB polarization power supplies power-supplying circuit according to claim 7, which is characterized in that the resistance R3 and ground connection
Between be equipped with connection I/O port conduct electrons switch Q1, resistance R4 and ground connection between be equipped with connection I/O port conduct electrons switch
Q2。
9. LNB polarization power supplies power-supplying circuit according to claim 8, which is characterized in that the conduct electrons switch
Q1 and conduct electrons switch Q2 be metal-oxide-semiconductor, controller be can by control its I/O port control metal-oxide-semiconductor conducting MCU or
CPU。
10. the LNB polarization power supply power-supplying circuits according to any one of claim 1~9, which is characterized in that institute
It is MP2452 to state DC-DC chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064310.3U CN207664875U (en) | 2018-01-16 | 2018-01-16 | A kind of LNB polarization power supplies power-supplying circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064310.3U CN207664875U (en) | 2018-01-16 | 2018-01-16 | A kind of LNB polarization power supplies power-supplying circuit |
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| CN207664875U true CN207664875U (en) | 2018-07-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233711A (en) * | 2018-01-16 | 2018-06-29 | 四川安迪科技实业有限公司 | A kind of LNB polarization power supplies power-supplying circuit |
| CN113193747A (en) * | 2020-01-14 | 2021-07-30 | 江苏东海半导体科技有限公司 | Switch tube boosting module |
-
2018
- 2018-01-16 CN CN201820064310.3U patent/CN207664875U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233711A (en) * | 2018-01-16 | 2018-06-29 | 四川安迪科技实业有限公司 | A kind of LNB polarization power supplies power-supplying circuit |
| CN113193747A (en) * | 2020-01-14 | 2021-07-30 | 江苏东海半导体科技有限公司 | Switch tube boosting module |
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