CN203775325U - Power supply device with automatic protection and automatic restoring functions and television - Google Patents
Power supply device with automatic protection and automatic restoring functions and television Download PDFInfo
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- CN203775325U CN203775325U CN201420146186.7U CN201420146186U CN203775325U CN 203775325 U CN203775325 U CN 203775325U CN 201420146186 U CN201420146186 U CN 201420146186U CN 203775325 U CN203775325 U CN 203775325U
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Abstract
The utility model discloses a power supply device with automatic protection and automatic restoring functions and a television. The power supply device comprises the components of: a power supply module, a detecting module, a restoring module and a main chip. The main chip is connected with the detecting module, the restoring module and the power supply module. The power supply module is connected with peripheral equipment through a high-frequency head. The power supply device provided by the utility model controls for activating and stopping the power supply module through receiving activating/stopping signals input from outside by the main chip. The power supply module generates voltage supply voltage for supplying power to the peripheral equipment when activated. The detecting module detects operation state of the peripheral equipment in real time when electric power is supplied. When shortcircuit or normal state of the peripheral equipment is detected, a detecting signal with a corresponding level is output to the main chip for activating and stopping the power supply module, thereby realizing the automatic detection and automatic protection functions in shortcircuit. The restoring module outputs a restoring control signal to the main chip for activating the power supply module after shortcircuit is eliminated for automatically restoring power supply of the television to the peripheral equipment. Furthermore electronic elements used in the circuit are routine elements. Simple circuit structure and relatively low cost are realized.
Description
Technical field
The utility model relates to television set power supply technique field, particularly a kind of electric supply installation and television set with automatic protection and auto restore facility.
Background technology
Along with the development of television set industry and intelligent product, for the small active antenna technology of receiving digital television signal, in succession develop.This antenna carries active rf signal amplification circuit, the signal with certain multiple amplifies and frequency coverage function, can meet and receive DVB-T(Digital Video Broadcasting – Terrestrial, ground digital television broadcast) and DVB-T2(second generation Europe Digital Terrestrial Television Broadcast transmission standard) etc. the requirement of signal, the area that makes small active antenna be widely used in having this type of signal is used.While using this type of antenna, television set must have reliable and stable output power supply circuits.When if television set accesses without the passive antenna of power supply, need the power supply circuits of user's closing television machine.Such as Thailand, the countries such as Singapore, all require the high frequency head end of television set to export to make the DC power supply that user can switch in its digital television standard.
Yet in existing television set industry; when tuner is powered to peripheral hardware, if peripheral hardware failed shorted, tuner can not detect short-circuit conditions and automatically carry out tripping protection; its damage or generation security incident that still continued power causes electric weight waste or directly causes television set, hidden danger etc.After peripheral hardware is removed short trouble, need user that supplying power for tuner is set again, can not automatic recovery of power supply, or permanent loss function of supplying power.
In view of this, the utility model provides a kind of electric supply installation and television set with automatic protection and auto restore facility.
Utility model content
In view of above-mentioned the deficiencies in the prior art part; the purpose of this utility model is to provide a kind of electric supply installation and television set with automatic protection and auto restore facility, to solve existing power supply circuits, can not detect short circuit problem that automatically protection and short circuit can not automatic recovery of power supply after removing.
In order to achieve the above object, the utility model has been taked following technical scheme:
An electric supply installation with automatic protection and auto restore facility, is connected with the tuner of television set, and it comprises:
For generating supply power voltage to the supply module of peripheral hardware power supply;
For detecting in real time the operating state of peripheral hardware, detect peripheral hardware short circuit or export the detection module of the detection signal of corresponding level when normal;
After removing for short circuit, output recovers control signal to the recovery module of master chip;
Be used for receiving the open and close signal of outside input or the detection signal control supply module keying of described detection module output, according to recovering control signal, control the master chip that supply module is opened;
Described master chip connection detection module, recovery module and supply module, described supply module connects peripheral hardware by tuner.
In the described electric supply installation with automatic protection and auto restore facility, described supply module comprises voltage stabilizing circuit, the first metal-oxide-semiconductor, the first resistance and the second resistance; The grid of described the first metal-oxide-semiconductor connects one end of the first resistance, the other end of the first resistance connects one end of the second resistance and the SW1 pin of master chip, the other end of the second resistance connects the output of voltage stabilizing circuit and the source electrode of the first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects RF radio-frequency terminals.
In the described electric supply installation with automatic protection and auto restore facility, described the second resistance is biasing resistor, and the first metal-oxide-semiconductor is PMOS pipe.
In the described electric supply installation with automatic protection and auto restore facility, described supply module also comprises the first electric capacity, the first inductance and electrostatic impedor; One end of described the first inductance connects the drain electrode of the first metal-oxide-semiconductor, also by the first capacity earth, the other end of the first inductance connects the RF radio-frequency terminals of tuner, also by electrostatic impedor ground connection.
In the described electric supply installation with automatic protection and auto restore facility; described detection module comprises the 3rd resistance and the 4th resistance; one end of the 3rd resistance connects the drain electrode of the first metal-oxide-semiconductor, and the other end of described the 3rd resistance connects the DETECT I/O pin of master chip, also by the 4th grounding through resistance.
In the described electric supply installation with automatic protection and auto restore facility; described recovery module comprises the second metal-oxide-semiconductor, the 5th resistance, the 6th resistance and the 7th resistance; the drain electrode of described the second metal-oxide-semiconductor connects the drain electrode of the first metal-oxide-semiconductor and one end of the 3rd resistance by the 5th resistance; the grid of the second metal-oxide-semiconductor connects one end of the 6th resistance; the other end of the 6th resistance connect master chip SW2 pin, also by the 7th resistance, connect the source electrode of the second metal-oxide-semiconductor, the dynamo-electric source of source electrode connecting TV of the second metal-oxide-semiconductor.
In the described electric supply installation with automatic protection and auto restore facility, described the second metal-oxide-semiconductor is PMOS pipe, and the resistance of the 5th resistance is 10K Ω, and the resistance of the 3rd resistance is 10K Ω, and the resistance of the 4th resistance is 22K Ω.
In the described electric supply installation with automatic protection and auto restore facility, the model of master chip is MSD6308RT; The resistance of the 3rd resistance, the 4th resistance and the 5th resistance is closed:
Vh < (V0 * R4)/(R3+R4) < VH, and Vh < (V
vCC* R4)/(R3+R4+R5) < VH; Wherein, the DETECT I/O pin that Vh is master chip can be identified as the minimum incoming level value of high level, and VH is the master chip maximum level that its DETECT I/O pin limits while normally working; V0 is the direct voltage of voltage stabilizing circuit output, V
vCCvoltage for TV set power end.
A television set, it comprises tuner and the described electric supply installation with automatic protection and auto restore facility, described tuner connects the electric supply installation with automatic protection and auto restore facility.
In the described electric supply installation with automatic protection and auto restore facility, described tuner comprises RF radio-frequency terminals and ground; Tuner is connected with peripheral hardware by RF cable, also by RF radio-frequency terminals, is connected with the supply module of electric supply installation; Ground in electric supply installation is connected with the ground of tuner.
Compared to prior art, the electric supply installation with automatic protection and auto restore facility and television set that the utility model provides, the open and close signal that receives outside input by master chip is controlled supply module and is opened and closed, supply module generates supply power voltage while starting and powers to peripheral hardware, during power supply, detection module detects the operating state of peripheral hardware in real time, the detection signal that detects peripheral hardware short circuit or export corresponding level when normal is controlled supply module to master chip and is opened and closed, and realizes automatic detection and the automatic protection functions of short circuit; Recover module output recovery control signal after short circuit releasing and control supply module unlatching to master chip, automatically recover the power supply of television set to peripheral hardware; And the electronic component using in its circuit is conventional element, circuit structure is simple, cost is lower.
Accompanying drawing explanation
The structured flowchart of the television set with automatic protection and auto restore facility that Fig. 1 provides for the utility model embodiment;
The circuit diagram of the electric supply installation Application Example with automatic protection and auto restore facility that Fig. 2 provides for the utility model embodiment.
Embodiment
The utility model provides a kind of electric supply installation and television set with automatic protection and auto restore facility; for making the purpose of this utility model, technical scheme and effect clearer, clear and definite, referring to the accompanying drawing embodiment that develops simultaneously, the utility model is further described.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The electric supply installation with automatic protection and auto restore facility that the utility model provides, tuner by television set is powered to external equipment (being peripheral hardware), can detect in real time the operating state of peripheral hardware, when detecting peripheral hardware short circuit, automatically disconnect power supply, realize defencive function; After detecting short circuit releasing, automatically recover the power supply of television set to peripheral hardware.Please refer to Fig. 1 and Fig. 2, the electric supply installation with automatic protection and auto restore facility that the utility model embodiment provides is arranged in television set 10, be connected with the tuner 100 of television set, it comprises supply module 200, detection module 300, recovers module 400 and master chip 500; Described master chip 500 connection detection module 300, recovery module 400 and supply module 200, described supply module 200 connects peripheral hardwares 20 by tuner 100.
Wherein, described tuner 100 comprises that RF radio-frequency terminals 101(is the round dot in Fig. 2) and ground 102(be around the annulus of RF radio-frequency terminals 101 in Fig. 2).Tuner 100 is connected with peripheral hardware 20 by RF cable 103, also by RF radio-frequency terminals 101, is connected with supply module 200.Should be understood that, the internal structure of tuner 100 is prior art, except the above-mentioned RF radio-frequency terminals 101 of mentioning, 102, also comprise miscellaneous part.The present embodiment is mainly that the annexation of the above-mentioned parts in tuner 100 is improved, to reach the function of powering to peripheral hardware by tuner and to make detection module 300 state of peripheral hardware short circuit can be detected.Described master chip 500 is the conventional control chip (being integrated chip) of television set, and its inside is comprised of a plurality of integrated circuits; During concrete enforcement, adoptable model comprises MST6E182XDT, MSD6308RT etc.
The present embodiment is provided with " supplying power for tuner ON/OFF " option in television operation menu, and whether user by selecting is opened or closed and can control described electric supply installation and peripheral hardware is powered; Be specially: when being set to " opening ", master chip 500, according to the supply power voltage of opening signal enabling supply module 200 output+5V of outside input, is exported to peripheral hardware 20 power supplies by tuner 100; Meanwhile, start recovery module 400 and carry out short circuit recovery detection.When being set to " pass ", master chip 500 is according to the pass signal at stop supply module 200 of outside input and recover module 400, thereby stop exporting supply power voltage, disconnects the power supply to peripheral hardware 20.
Correspondingly, the present embodiment is when carrying out supplying power for tuner, described detection module 300 can also detect the operating state of peripheral hardware 20 in real time, when detecting peripheral hardware 20 short circuits and exporting corresponding detection signal to master chip 500 when normal, master chip 500 is correspondingly controlled supply module 200 according to described detection signal and is opened and closed.In the present embodiment, when when short circuit is set, detection signal is low level, master chip 500 is closed supply module 200; When peripheral hardware being set normally working, detection signal is high level, master chip 500 starts supply modules 200.After short circuit is removed, described recovery module output recovers control signal (high level is effective) to master chip 500, and master chip 500 is controlled supply module 200 according to recovery control signal and opened.When supply module 200 is opened, the supply power voltage of can generate+5V, to peripheral hardware 20 power supplies, is exported without supply power voltage when supply module 200 is closed.
Wherein, described supply module 200 comprises voltage stabilizing circuit 201, the first metal-oxide-semiconductor Q1, the first resistance R 1 and the second resistance R 2.The grid of described the first metal-oxide-semiconductor Q1 connects one end of the first resistance R 1, the other end of the first resistance R 1 connects one end of the second resistance R 2 and the SW1 pin of master chip 500, the other end of the second resistance R 2 connects the output of voltage stabilizing circuit 201 and the source electrode of the first metal-oxide-semiconductor Q1, and the drain electrode of the first metal-oxide-semiconductor Q1 connects RF radio-frequency terminals 101.
Described the first resistance R 1 is for the protection of the grid of the first metal-oxide-semiconductor Q1, and the second resistance R 2 is biasing resistor.Described the first metal-oxide-semiconductor Q1 is PMOS pipe.Described voltage stabilizing circuit 201 gets final product work at television boot-strap state, the direct voltage of stable output+5V, and its power output can meet the need for electricity of peripheral hardware, and it is prior art; During concrete enforcement, can adopt the model of 7805(integrated regulator) etc. the 5V voltage-stabilized power supply circuit that forms, this is not described further herein.When the SW1 of master chip 500 pin output low level, the first metal-oxide-semiconductor Q1 conducting is transferred to tuner 100 supplying power for outsides by the supply power voltage of export+5V of voltage stabilizing circuit 201.
In order to improve the stability of supply power voltage, described supply module 200 also comprises the first capacitor C 1.For direct current supply path is provided, and stop antenna reception to RF signal flow into this electric supply installation, prevent that electric supply installation from impacting RF signal, described supply module 200 also comprises the first inductance L 1.In order to resist extraneous ESD(Electro-Static discharge, static discharges) disturb, described supply module 200 also comprises electrostatic impedor ESD1.One end of described the first inductance L 1 connects the drain electrode of the first metal-oxide-semiconductor Q1, also by the first capacitor C 1 ground connection, the other end of the first inductance L 1 connects the RF radio-frequency terminals 101 of tuner, also by electrostatic impedor ESD1 ground connection.
In specific implementation process, described detection module 300 comprises the 3rd resistance R 3 and the 4th resistance R 4, one end of the 3rd resistance R 3 connects the drain electrode of the first metal-oxide-semiconductor Q1, and the other end of described the 3rd resistance R 3 connects the DETECT I/O pin of master chip 500, also by the 4th resistance R 4 ground connection.Master chip 500 can identify the operating state (normal or short circuit) of peripheral hardware by the low and high level on detection DETECT I/O pin, is specially:
When peripheral hardware 20 or 103 short circuit of RF cable, A point voltage will be pulled into down low level by force, the DETECT I/O pin of master chip 500 detects this low level and is identified as short circuit, master chip 500 is controlled its SW1 pin output high level and is ended the first metal-oxide-semiconductor Q1, disconnects the supply power voltage transmission channel of voltage stabilizing circuit 201.
When short circuit is removed, A point voltage is no longer dragged down by force, now by recovering module 400, detects short circuit releasing situation, makes master chip 500 control supply modules 200 and restores electricity.Described recovery module 400 comprises the second metal-oxide-semiconductor Q2, the 5th resistance R 5, the 6th resistance R 6 and the 7th resistance R 7, the drain electrode of described the second metal-oxide-semiconductor Q2 connects the drain electrode of the first metal-oxide-semiconductor Q1 and one end of the 3rd resistance R 3 by the 5th resistance R 5, the grid of the second metal-oxide-semiconductor Q2 connects one end of the 6th resistance R 6, the other end of the 6th resistance R 6 connects the SW2 pin of master chip 500, also by the 7th resistance R 7, connects the source electrode of the second metal-oxide-semiconductor Q2, the dynamo-electric source VCC of source electrode connecting TV of the second metal-oxide-semiconductor Q2.Described TV set power end VCC is the power supply pin of drawing in the existing energy supply control module of television set, the voltage of generation+5V after television set switches on power.Described the second metal-oxide-semiconductor Q2 is PMOS pipe.
When the described electric supply installation with automatic protection and auto restore facility is worked, the SW2 pin output high level conducting second metal-oxide-semiconductor Q2 of master chip 500.When short circuit is removed, TV set power end VCC+5V voltage draws high A point voltage by the dividing potential drop of the 5th resistance R 5, the 3rd resistance R 3 and the 4th resistance R 4, when the DETECT I/O pin of master chip 500 detects high level, identifying short circuit removes, its SW1 pin output low level is carried out conducting the first metal-oxide-semiconductor Q1, the supply power voltage transmission channel of opening voltage stabilizing circuit 201, restores electricity.
It should be noted that, due to described electric supply installation the first metal-oxide-semiconductor Q1 and the equal conducting of the second metal-oxide-semiconductor Q2 when normally working, for fear of the second metal-oxide-semiconductor Q2 output current, affect the power supply of voltage stabilizing circuit 201, and electric supply installation, to the little electric current of peripheral hardware output stage, does not produce hidden danger during peripheral hardware short circuit.The resistance value ratio of described the 5th resistance R 5 is larger, as 10K Ω, makes short-circuit output current minimum.Simultaneously, for the branch pressure voltage (high level) of the 5th resistance R 5, the 3rd resistance R 3 and the 4th resistance R 4 can be detected by the DETECT I/O pin of master chip 500, there is certain relation in the resistance of described the 3rd resistance R 3, the 4th resistance R 4 and the 5th resistance R 5, and this relation is relevant with the model of master chip 500.
It is Vh < (V0 * R4)/(R3+R4) < VH, and Vh < (V that the resistance of the 3rd resistance R 3, the 4th resistance R 4 and the 5th resistance R 5 is closed
vCC* R4)/(R3+R4+R5) < VH.
Wherein: Vh represents that the DETECT I/O pin of master chip 500 can be identified as the minimum incoming level value (being identified as the critical value of high level) of high level, that is to say, this DETECT I/O pin is when recognizing outside and being input as high level, this high level minimum can not be less than Vh; When the level of input is while being less than Vh, recognition result is uncertain or be low level.When VH represents master chip 500 normal work, its DETECT I/O pin limits the maximum level of (can bear for a long time); If be less than VH master chip 500 can not damage, higher than VH, master chip 500 likely damages.V0 represents the direct voltage (for example+5V) of voltage stabilizing circuit output.V
vCCvoltage for TV set power end VCC.Vh is relevant with the model of master chip 500 with the level value of VH, and concrete numerical value can obtain from the technical manual of master chip, this is not described further herein.
Hence one can see that; in the circuit structure of the electric supply installation that the present embodiment provides; the resistance that defines the 3rd resistance R 3, the 4th resistance R 4 and the 5th resistance R 5 need meet above-mentioned two relation formulas simultaneously; and relevant to the model of master chip 500, so that described electric supply installation can accurately be realized automatic protection and auto restore facility.
In the present embodiment: the model of master chip 500 is MST6E182XDT, Vh=1V accordingly, VH=5V, V0=V
vCC=5V, when the resistance of the 5th resistance R 5 is 10K Ω, the resistance of the 3rd resistance R 3 is 10K Ω, the resistance of the 4th resistance R 4 is 22K Ω.Meet above-mentioned relation formula, during short circuit, outwards the leakage current of the output 0.5mA(that only has an appointment approximates V
vCC/ R5).
It will be appreciated that, the pin of the SW1 pin of the master chip 500 of mentioning in the present embodiment, SW2 pin, DETECT I/O pin is by name self-defined; Its pin name actual in MST6E182XDT is respectively GPIO6, GPIO7, GPIO8, and its attribute is defined as respectively output, output, input by software.The present embodiment is self-defined to the title of existing pin is each pin actual functional capability in the present embodiment for convenience of description.SW1 pin, SW2 pin, DETECT I/O pin difference corresponding actual GPIO6, GPIO7, GPIO8 in the present embodiment, only title is different, and the function of this pin is identical.
Further, in the present embodiment, the ground in the described electric supply installation with automatic protection and auto restore facility is connected with the ground 102 of tuner, can facilitates circuit to connect, can realize again the ground protection of better effects if.
Please continue to refer to Fig. 1 and Fig. 2; the electric supply installation with automatic protection and auto restore facility that the present embodiment provides; by user to " supplying power for tuner ON/OFF " the option setting in TV user menu; in order to receive the open and close signal of outside input, control that supplying power for tuner is opened or the principle that quits work is:
One,, when user is set to " opening ", is equivalent to outside input and opens signal to master chip 500; Now, the SW1 pin output low level of master chip 500 makes the first metal-oxide-semiconductor Q1 conducting.Meanwhile, the SW2 pin output low level of master chip 500 makes the second metal-oxide-semiconductor Q2 conducting.Due to the resistance value ratio of the 5th resistance R 5 large (1K Ω), the second metal-oxide-semiconductor Q2 does not provide electric current output substantially.Now, export+5V voltage of voltage stabilizing circuit 201 is transferred to peripheral hardware 20 power supplies by the first metal-oxide-semiconductor Q1, the first inductance L 1, the RF radio-frequency terminals 101 of tuner, RF cable 103 successively.
Two, when user is set to " pass ", be equivalent to outside input and close signal to master chip 500: now, SW1 pin, the SW2 pin of master chip 500 are all exported high level, the first metal-oxide-semiconductor Q1 and the second metal-oxide-semiconductor Q2 end simultaneously, the power supply of A point is cut off, also just do not have+5V of RF radio-frequency terminals 101 Voltage-output of tuner, supplying power for tuner stops.
Please again consult Fig. 1 and Fig. 2, the described electric supply installation that the present embodiment provides is set to " opening " user while powering, and its operation principle that realizes protection automatically and auto restore facility is:
1, when access is during normal peripheral hardware, 500 pairs of peripheral hardwares power supplies of master chip (that specific works principle refers to is above-mentioned ", when user is set to " opening ", be equivalent to outside input and open signal to master chip 500 ").Suppose that peripheral hardware fault causes short circuit or the short circuit of RF cable; A point voltage is pulled into down low level by force; the DETECT I/O pin of master chip 500 detects this low level; master chip 500 controller SW1 pin become high level makes the first metal-oxide-semiconductor Q1 cut-off; thereby disconnect power supply, play the protective effect of automatic detection and automatic cut-off power.Although now the second metal-oxide-semiconductor Q2 maintains conducting state, because the resistance of the 5th resistance R 5 is larger, the electric current providing is minimum, and the voltage at A point place can not rise, and also can not damage the second metal-oxide-semiconductor Q2.
2,, after short circuit is excluded, the voltage at A point place is no longer dragged down by force.Because the second metal-oxide-semiconductor Q2 maintains conducting state, input+5V voltage of TV set power end VCC is loaded into DETECT I/O pin by the 5th resistance R 5, the 3rd resistance R 3, the 4th resistance R 4, voltage on DETECT I/O pin is the dividing potential drop of the 5th resistance R 5, the 3rd resistance R 3,4 couples+5V of the 4th resistance R voltage, is high level.The DETECT I/O pin of master chip 500 detects high level and identifies short circuit and remove, and it is controlled SW1 pin and converts low level output to, makes the first metal-oxide-semiconductor Q1 conducting again, thus automatically recover voltage stabilizing circuit 201+5V function of supplying power.
The utility model is also corresponding provides a kind of television set, comprise tuner and the electric supply installation with automatic protection and auto restore facility, described tuner connects the electric supply installation with automatic protection and auto restore facility, and electric supply installation is powered to peripheral hardware by tuner according to the supply power voltage of opening signal output+5V of outside input; When closing signal, outside input stops power supply.When electric supply installation detects peripheral hardware short circuit, stop power supply, when detecting when short circuit is removed, restore electricity.The circuit structure and the operation principle that based on this, have the electric supply installation of automatic protection and auto restore facility have been described in detail above, repeat no more herein.
Further, need to be circumscribed with in the TV set-top box of source antenna or other television set that need to be circumscribed with source device and equally the electric supply installation that this has automatic protection and auto restore facility can be set.Such as for satellite television receiving antenna, can the reception amplification that this electric supply installation provides DC power supply to come driven antenna inside, the circuit such as frequency conversion be set in Set Top Box.
In sum, the utility model can by relevant option in television operation menu control electric supply installation by tuner the power supply state to peripheral hardware, when power supply, can detect in real time the operating state of peripheral hardware, when detecting peripheral hardware short circuit, automatically disconnect power supply, realize automatic detection and the automatic protection functions of short circuit; After detecting short circuit releasing, automatically recover the power supply of television set to peripheral hardware; And the electronic component using in its circuit is conventional element, circuit structure is simple, cost is lower.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (10)
1. an electric supply installation with automatic protection and auto restore facility, is connected with the tuner of television set, it is characterized in that, comprising:
For generating supply power voltage to the supply module of peripheral hardware power supply;
For detecting in real time the operating state of peripheral hardware, detect peripheral hardware short circuit or export the detection module of corresponding level signal when normal;
After removing for short circuit, output recovers control signal to the recovery module of master chip;
Be used for receiving the open and close signal of outside input or the detection signal control supply module keying of described detection module output, according to recovering control signal, control the master chip that supply module is opened;
Described master chip connection detection module, recovery module and supply module, described supply module connects peripheral hardware by tuner.
2. the electric supply installation with automatic protection and auto restore facility according to claim 1, is characterized in that, described supply module comprises voltage stabilizing circuit, the first metal-oxide-semiconductor, the first resistance and the second resistance; The grid of described the first metal-oxide-semiconductor connects one end of the first resistance, the other end of the first resistance connects one end of the second resistance and the SW1 pin of master chip, the other end of the second resistance connects the output of voltage stabilizing circuit and the source electrode of the first metal-oxide-semiconductor, and the drain electrode of the first metal-oxide-semiconductor connects RF radio-frequency terminals.
3. the electric supply installation with automatic protection and auto restore facility according to claim 2, is characterized in that, described the second resistance is biasing resistor, and the first metal-oxide-semiconductor is PMOS pipe.
4. the electric supply installation with automatic protection and auto restore facility according to claim 2, is characterized in that, described supply module also comprises the first electric capacity, the first inductance and electrostatic impedor; One end of described the first inductance connects the drain electrode of the first metal-oxide-semiconductor, also by the first capacity earth, the other end of the first inductance connects the RF radio-frequency terminals of tuner, also by electrostatic impedor ground connection.
5. the electric supply installation with automatic protection and auto restore facility according to claim 2; it is characterized in that; described detection module comprises the 3rd resistance and the 4th resistance; one end of the 3rd resistance connects the drain electrode of the first metal-oxide-semiconductor, and the other end of described the 3rd resistance connects the DETECT I/O pin of master chip, also by the 4th grounding through resistance.
6. the electric supply installation with automatic protection and auto restore facility according to claim 5; it is characterized in that; described recovery module comprises the second metal-oxide-semiconductor, the 5th resistance, the 6th resistance and the 7th resistance; the drain electrode of described the second metal-oxide-semiconductor connects the drain electrode of the first metal-oxide-semiconductor and one end of the 3rd resistance by the 5th resistance; the grid of the second metal-oxide-semiconductor connects one end of the 6th resistance; the other end of the 6th resistance connect master chip SW2 pin, also by the 7th resistance, connect the source electrode of the second metal-oxide-semiconductor, the dynamo-electric source of source electrode connecting TV of the second metal-oxide-semiconductor.
7. the electric supply installation with automatic protection and auto restore facility according to claim 6, is characterized in that, described the second metal-oxide-semiconductor is PMOS pipe, and the resistance of the 5th resistance is 10K Ω, and the resistance of the 3rd resistance is 10K Ω, and the resistance of the 4th resistance is 22K Ω.
8. the electric supply installation with automatic protection and auto restore facility according to claim 6, is characterized in that, the model of master chip is MSD6308RT; The resistance of the 3rd resistance, the 4th resistance and the 5th resistance is closed:
Vh < (V0 * R4)/(R3+R4) < VH, and Vh < (V
vCC* R4)/(R3+R4+R5) < VH; Wherein, the DETECT I/O pin that Vh is master chip can be identified as the minimum incoming level value of high level, and VH is the master chip maximum level that its DETECT I/O pin limits while normally working; V0 is the direct voltage of voltage stabilizing circuit output, V
vCCvoltage for TV set power end.
9. a television set, is characterized in that, comprises tuner and the electric supply installation with automatic protection and auto restore facility as described in claim 1-8 any one, and described tuner connects the electric supply installation with automatic protection and auto restore facility.
10. the electric supply installation with automatic protection and auto restore facility according to claim 9, is characterized in that, described tuner comprises RF radio-frequency terminals and ground; Tuner is connected with peripheral hardware by RF cable, also by RF radio-frequency terminals, is connected with the supply module of electric supply installation; Ground in electric supply installation is connected with the ground of tuner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420146186.7U CN203775325U (en) | 2014-03-28 | 2014-03-28 | Power supply device with automatic protection and automatic restoring functions and television |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420146186.7U CN203775325U (en) | 2014-03-28 | 2014-03-28 | Power supply device with automatic protection and automatic restoring functions and television |
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| CN203775325U true CN203775325U (en) | 2014-08-13 |
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| CN201420146186.7U Expired - Fee Related CN203775325U (en) | 2014-03-28 | 2014-03-28 | Power supply device with automatic protection and automatic restoring functions and television |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632693A (en) * | 2017-11-03 | 2018-01-26 | 郑州云海信息技术有限公司 | A kind of administration of power supply of server storage node |
| CN109089089A (en) * | 2018-09-19 | 2018-12-25 | 青岛海信电器股份有限公司 | Over-current protection method, the satellite television receiver of antenna control chip |
| CN110933383A (en) * | 2018-09-19 | 2020-03-27 | 青岛海信电器股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632693A (en) * | 2017-11-03 | 2018-01-26 | 郑州云海信息技术有限公司 | A kind of administration of power supply of server storage node |
| CN109089089A (en) * | 2018-09-19 | 2018-12-25 | 青岛海信电器股份有限公司 | Over-current protection method, the satellite television receiver of antenna control chip |
| CN110933383A (en) * | 2018-09-19 | 2020-03-27 | 青岛海信电器股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
| CN109089089B (en) * | 2018-09-19 | 2021-04-16 | 海信视像科技股份有限公司 | Overcurrent protection method of antenna control chip and satellite television receiver |
| CN110933383B (en) * | 2018-09-19 | 2022-04-29 | 海信视像科技股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
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