CN101989852B - Single board, communication equipment, device for controlling power on/off of single board and method thereof - Google Patents
Single board, communication equipment, device for controlling power on/off of single board and method thereof Download PDFInfo
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- CN101989852B CN101989852B CN 200910089980 CN200910089980A CN101989852B CN 101989852 B CN101989852 B CN 101989852B CN 200910089980 CN200910089980 CN 200910089980 CN 200910089980 A CN200910089980 A CN 200910089980A CN 101989852 B CN101989852 B CN 101989852B
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- 238000010586 diagram Methods 0.000 description 5
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Abstract
The embodiment of the invention relates to a single board, communication equipment, a device for controlling power on/off of the single board and a method thereof. The device for controlling power on/off of the single board comprises a power slow starting circuit and a signal isolation control circuit which are connected together, wherein, the signal isolation control circuit transforms a low-voltage side control signal into a high-voltage side control signal and isolates the low-voltage side control signal from the high-voltage side control signal; and the power slow starting circuit switches on/off the single board under control of the high-voltage side control signal. In the embodiment of the invention, on the basis of power supply of the existing single board in the equipment, the low-voltage side control signal sent by a control module is transformed into the high-voltage side control signal so as to control on/off of the power slow starting circuit, thus realizing power on/off control of the single board in the communication equipment under the condition of avoiding an additional external switching device.
Description
Technical field
The present invention relates to communication technique field, relate in particular to the device and method of a kind of veneer, communication apparatus, the power-on and power-off of control veneer.
Background technology
At present, more and more enjoy attention for communication apparatus energy-conservation, the telecom operators in the whole world have all proposed a lot of energy-saving and emission-reduction requirements for the long-time running energy consumption of communication system, comprise the quiescent dissipation requirement of communication apparatus.In order to satisfy lower quiescent dissipation requirement, adopted the power supply soft-start circuit in the communication apparatus.Come the power-on and power-off of veneer in the communication control equipment by turning on and off the power supply soft-start circuit, in power cutoff soft-start circuit communication control equipment under the load of veneer the electricity situation under, make communication apparatus enter low energy consumption state, to reduce power consumption, satisfy the requirement of energy-saving and emission-reduction.
In the prior art, turning on and off of power supply soft-start circuit adopts switching device to realize.As shown in Figure 1, be provided with independent switching device 11 on the power supply input channel in the veneer, switching device 11 is under the control of control signal (such as PWRCtrl), opening or turn-offing by control power supply soft-start circuit 12, what the control power supply was inputted opens or turn-offs, thereby realizes the control to load 13 power-on and power-off of veneer.Control signal PWRCtrl is from the control module of communication apparatus.Switching device commonly used has mechanical relay or electronic switching device such as field effect transistor (MOSFET) etc.
In realizing process of the present invention, the inventor finds that there is following defective at least in prior art:
Increase extra switching device in the periphery of power supply soft-start circuit and carry out the control that turns on and off of current supply circuit, increased the complexity of circuit, and it is larger to take up room.
Summary of the invention
The embodiment of the invention proposes the device and method of a kind of veneer, communication apparatus, the power-on and power-off of control veneer.
The embodiment of the invention provides a kind of device of controlling the veneer power-on and power-off, comprises the power supply soft-start circuit, also comprises:
The signal isolation control circuit, described signal isolation control circuit is connected with described power supply soft-start circuit;
Described signal isolation control circuit is used for the low-pressure side control signal is converted to the high-pressure side control signal, and isolates described low-pressure side control signal and high-pressure side control signal; Described power supply soft-start circuit under the control of described high-pressure side control signal to Board Power up or lower electricity;
Wherein, described power supply soft-start circuit comprises N channel-type field effect transistor (Q1), voltage stabilizing didoe (D2), the first diode (D1), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the first electric capacity (C1) and the second electric capacity (C2); The source electrode of N channel-type field effect transistor (Q1) is connected with the input power negative pole, and drain electrode is connected with veneer; One end of the 4th resistance (R4) is connected with the grid of N channel-type field effect transistor (Q1), and the other end is connected with the output of described isolation control circuit; Voltage stabilizing didoe (D2) is connected in parallel between the source electrode of the other end of the 4th resistance (R4) and N channel-type field effect transistor; Be connected in parallel after the series connection of the 5th resistance (R5) and the second electric capacity (C2) between the drain electrode of the other end of the 4th resistance (R4) and N channel-type field effect transistor; The first resistance (R1) and the first electric capacity (C1) the rear branch circuit parallel connection that forms of connecting with the second resistance (R2) in parallel is connected between input power positive pole and the input power negative pole; The negative electrode of the first diode (D1) is connected on the connected node of the first resistance (R1) and the second resistance (R2), and the anode of the first diode (D1) is connected with the other end of the 4th resistance (R4); The 3rd resistance (R3) is connected between the anode and input power anodal (RTN) of the first diode (D1);
Wherein, described signal isolation control circuit comprises:
Isolating transformer, the former limit of described isolating transformer is used for receiving described low-pressure side control signal;
Change-over circuit, described change-over circuit is connected with the secondary of described isolating transformer, is used for described low-pressure side control signal is converted to described high-pressure side control signal;
Wherein, described change-over circuit comprises:
Electric capacity (C4), an end are connected to the former limit Same Name of Ends of described isolating transformer, and the other end receives the control signal PWRCtrl from the communication apparatus control module;
Diode, the anode of described diode links to each other with the secondary Same Name of Ends of described isolating transformer;
Filter capacitor, an end of described filter capacitor is connected with the negative electrode of described diode, and the other end is connected with the secondary different name end of described isolating transformer;
Drive resistance, an end of described driving resistance is connected with the negative electrode of described diode;
Triode, the base stage of described triode is connected with the other end of described driving resistance, the grid of field effect transistor drives resistance and is connected in collector electrode and the described power supply soft-start circuit, and the source electrode of field effect transistor is connected in the secondary different name end of emitter and described isolating transformer and the described power supply soft-start circuit.
The embodiment of the invention also provides a kind of veneer, comprising: the device of above-mentioned control veneer power-on and power-off.
The embodiment of the invention also provides a kind of communication apparatus, comprising: above-mentioned veneer.
The embodiment of the invention also provides a kind of method of controlling the veneer power-on and power-off, comprising:
Receive the low-pressure side control signal;
Described low-pressure side control signal is converted to the high-pressure side control signal, and isolates described low-pressure side control signal and high-pressure side control signal;
Utilize described high-pressure side control signal control power supply soft-start circuit to open or turn-off.
Above-described embodiment is on the power supply basis of existing equipment veneer, be converted to the high-pressure side control signal by the low-pressure side control signal that control module is sent, turning on and off of control power supply soft-start circuit, thereby avoiding additionally increasing in the situation of external switch device, realized the power-on and power-off control to veneer in the communication apparatus, so that communication apparatus can be controlled electricity under the veneer when the full port of veneer is idle, enter energy saver mode, reduce energy consumption; Simultaneously also can make communication apparatus according to service needed, in the situation of the function of the soft-start circuit that does not affect veneer, control Board Power up, enter normal mode of operation.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the schematic diagram that turns on and off of power supply soft-start circuit in the prior art;
A kind of structural representation of controlling the device of veneer power-on and power-off that Fig. 2 provides for the embodiment of the invention;
The another kind that Fig. 3 provides for the embodiment of the invention is controlled the circuit theory diagrams of the device of veneer power-on and power-off;
The circuit theory diagrams of the device of another control veneer power-on and power-off that Fig. 4 provides for the embodiment of the invention;
The structural representation of the veneer that Fig. 5 provides for the embodiment of the invention;
The structural representation of the communication apparatus that Fig. 6 provides for the embodiment of the invention;
A kind of flow chart of controlling the method for veneer power-on and power-off that Fig. 7 provides for the embodiment of the invention.
Embodiment
A kind of structural representation of controlling the device of veneer power-on and power-off that Fig. 2 provides for the embodiment of the invention.Described device comprises: power supply soft-start circuit 21 and signal isolation control circuit 22.Signal isolation control circuit 22 is connected with described power supply soft-start circuit 21; Described signal isolation control circuit 22 is used for the low-pressure side control signal is converted to the high-pressure side control signal, and with described low-pressure side control signal and the isolation of high-pressure side control signal; The load to veneer under the control of described high-pressure side control signal of described power supply soft-start circuit 21 powers on or lower electricity.The low-pressure side control signal is sent by the control module in the communication apparatus, is used for control power supply soft-start circuit 21 to the veneer power-on and power-off.
In the present embodiment, signal isolation control circuit 22 is under the low-pressure side control signal PWRCtrl of communication apparatus control, low-pressure side control signal PWRCtrl is converted to the high-pressure side control signal sends to power supply soft-start circuit 21, field effect transistor (MOSFET) conducting in the control power supply soft-start circuit 21 or close, thereby open or powered-down soft-start circuit 21 power-on and power-off of control veneer.Solve prior art and the power supply soft-start circuit has been carried out the complicated and problem such as larger that takes up room of circuit that control brings that turns on and off of current supply circuit by increasing switching device.
The low-pressure side control signal can be level signal, also can be pulse signal.
When the low-pressure side control signal was level signal, signal isolation control circuit 22 can comprise: light-coupled isolation device, control circuit and limiting element.The light-coupled isolation device is used for isolating described low-pressure side control signal and high-pressure side control signal, avoids the low-pressure side control signal that power supply soft-start circuit 21 is exerted an influence, and guarantees that power supply soft-start circuit 21 only is subjected to the control of high-pressure side control signal.It is in the situation of high level that control circuit is used in described low-pressure side control signal, controls the collector and emitter saturation conduction of described light-coupled isolation device secondary; And for being in the low level situation in described low-pressure side control signal, control the former limit cut-off of described light-coupled isolation device.Current limiting element is used for limiting the collector electrode of described light-coupled isolation device to the electric current of emitter in the situation of the collector electrode of described light-coupled isolation device secondary and emitting stage saturation conduction.Described current limiting element can be resistance.
Described control circuit can comprise: drive resistance, pull down resistor and filter capacitor.The anodic bonding on one end of described driving resistance and the former limit of described light-coupled isolation device, the other end connect to be used for sending the control module of described low-pressure side control signal, are used for current limit with the former limit of described light-coupled isolation device at 5 milliamperes of (mA)～10mA.The anodic bonding on one end of described pull down resistor and the former limit of described light-coupled isolation device, other end ground connection.The anodic bonding on one end of described filter capacitor and the former limit of described light-coupled isolation device, other end ground connection.The resistance of described pull down resistor can be 4.7 kilohms of (K Ω)～10K Ω; The appearance value of described electric capacity can be 0.1 microfarad (μ F)～0.47 μ F.
When the low-pressure side control signal was pulse signal, signal isolation control circuit 22 can comprise: isolating transformer, change-over circuit and triode.The former limit of described isolating transformer is connected with the control module that is used for sending described low-pressure side control signal.Described change-over circuit is connected with the secondary of described isolating transformer, is used for the low-pressure side control signal is converted to described high-pressure side control signal.The base stage of described triode is connected with the other end of described driving resistance, the grid of field effect transistor drives resistance and is connected in collector electrode and the described power supply soft-start circuit, and the source electrode of field effect transistor is connected in the secondary Same Name of Ends of emitter and described isolating transformer and the described power supply soft-start circuit.
Described change-over circuit also can comprise: current-limiting resistance.The collector electrode of described triode is connected with the grid driving resistance of field effect transistor in the described power supply soft-start circuit by described current-limiting resistance.
Described signal isolation control circuit 22 also can comprise: capacitance.The former limit of described isolating transformer is connected with described control module by described capacitance.
The another kind that Fig. 3 provides for the embodiment of the invention is controlled the circuit theory diagrams of the device of veneer power-on and power-off.Described circuit comprises: power supply soft-start circuit 31 and signal isolation control circuit 32.Wherein RTN represents-the 48V return terminal, and GND represents the place of working.
Power supply soft-start circuit 31 comprises N channel-type MOSFET pipe Q1.The control end of power supply soft-start circuit 31 is grid source electrodes of N-type channel MOS tube Q1, and the control circuit of power supply soft-start circuit 31 self.Self control circuit of power supply soft-start circuit 31 comprises voltage stabilizing didoe D2, resistance R 5, capacitor C 2, resistance R 2, resistance R 1, capacitor C 1, diode D1, resistance R 4 and resistance R 3.The grid that voltage stabilizing didoe D2 is connected in MOSFET pipe Q1 in parallel drives between resistance R 4 and the source electrode.After resistance R 5 and capacitor C 2 series connection and between the grid driving resistance R 4 and drain electrode of N channel-type MOSFET pipe Q1.Resistance R 2, resistance R 1, capacitor C 1 form the resistive-capacitive voltage divider network node, and resistance R 1 and capacitor C 1 are connected in parallel rear and resistance R 2 is cascaded, and are connected in parallel between the power input.The negative electrode of diode D1 is connected on the dividing potential drop node of resistance R 1, capacitor C 1 and resistance R 2; The anodic bonding of diode D1 is on the driving resistance R 4 of the grid of MOSFET pipe Q1.Anode and MOSFET that resistance R 4 is connected to diode D1 manage between the grid of Q1.Resistance R 3 is connected between the anode and input power positive pole of diode D1.
The effect of resistance R 2, capacitor C 1 is to prevent MOSFET pipe Q1 misleading when just powering on.And the impedance of capacitor C 1 is lower during owing to just powered on, and therefore for resistance R 2 certain power requirement is arranged, and namely under maximum input voltage Vin (max), the power of resistance R 2 is greater than Vin (max)
2/ R2.
The effect of resistance R 1 is to provide discharge channel to capacitor C 1, and requirement dividing potential drop on the resistance R 1 in input voltage range is greater than the voltage stabilizing value of voltage-stabiliser tube D2.
The Main Function of diode D1 is: prevent that by capacitor C 1 MOSFET pipe Q1 from misleading when power supply soft-start circuit 31 powers on to the load on the veneer, and when capacitor C 1 voltage is higher than the grid voltage of MOSFET pipe Q1, end, affected by capacitor C 1 with the gate charges process that prevents MOSFET pipe Q1.Because the forward conduction voltage drop of diode D2 can affect the moving time-delay of debounce, therefore, selects the little Schottky diode of conduction voltage drop better as diode D2 effect.
Resistance R 4, resistance R 5 is used for preventing MOSFET pipe Q1 self-oscillation, require the resistance of resistance R 4, resistance R 5＜＜resistance of resistance R 3.Resistance R 4 spans cause and mislead because resistance R 4 values are crossed conference, so can be 10 Ω～50 Ω.
After power supply soft-start circuit 31 powered on to load, voltage stabilizing didoe D2 provided the gate source voltage of MOSFET pipe Q1, protected simultaneously between the grid source electrode of MOSFET pipe Q1 and was not subjected to impacting with high pressure.
The charge circuit of resistance R 3 and capacitor C 2 is opening processes of control MOSFET pipe Q1, and the Main Function of capacitor C 2 is parasitic capacitance (mainly being Cgd) non-linear of compensating MOS FET pipe Q1, require capacitor C 2＞＞Cgd+Cgs.Wherein, Cgd, Cgs are respectively drain-gate and the gate-source parasitic capacitances of MOSFET pipe Q1.
Signal isolation control circuit 32 comprises light-coupled isolation device U1 and the peripheral devices such as resistance R 6, resistance R 7, resistance R 8 and capacitor C 3.The secondary collector electrode of light-coupled isolation device U1 (the C utmost point) is connected on the resistance R 4 of power supply soft-start circuit 31 by resistance R 6.Resistance R 4 is the driving resistance that the MOSFET of N channel-type manages the grid of Q1.The emitter of light-coupled isolation device U1 (the E utmost point) is connected with the source electrode of MOSFET pipe Q1.Control drives signal PWRCtrl is connected to the former limit of light-coupled isolation device U1 by driving resistance R 7 anode.Drive resistance R 7 the Current Limits on the former limit of light-coupled isolation device U1 between 5mA～10mA, filter capacitor C3 and earth resistance R8 are connected between the anode and negative electrode on former limit of light-coupled isolation device U1.The span of filter capacitor C3 can be 0.1uF～0.47uF, and the span of earth resistance R8 can be 4.7K Ω～10K Ω.
The control module of communication apparatus sends to signal isolation control circuit 32 with Energy Saving Control signal PWRCtrl, the control that the upper MOSFET pipe Q1 of the power supply soft-start circuit by 32 pairs of veneers of signal isolation control circuit opens or turn-offs, opening or turn-offing in order to the input power of realizing veneer.
Level (such as TTL) control signal PWRCtrl from control module in the communication apparatus drives light-coupled isolation device U1, because control signal PWRCtrl is low voltage level, light-coupled isolation device U1 is used for the control signal that control signal that isolation communication apparatus control module sends and MOSFET manage Q1, by turning on and off of MOSFET pipe Q1 in the control power supply soft-start circuit 31, thus the turn-on and turn-off of realization input power passage.
When control signal PWRCtrl is low level or NC state when being no signal, the former not conducting of limit of light-coupled isolation device U1, this moment, control signal PWRCtrl was inoperative, did not affect normally working on power of 31 pairs of veneers of power supply soft-start circuit.
When control signal PWRCtrl is high level, electric current I=V (PWRCtrl) that light-coupled isolation device U1 passes through on former limit/R7.At this moment, the value that resistance R 7 is got will guarantee the CE utmost point saturation conduction of light-coupled isolation device U1 secondary, and the gate drive voltage of MOSFET pipe Q1 is pulled low to low level, and MOSFET pipe Q1 turn-offs, and capacitor C 2 is discharged the soft start function of Reset Board simultaneously.The CE electric current of resistance R 6 restriction light-coupled isolation device U1 secondary, the CE that avoids at light-coupled isolation device U1 light-coupled isolation device U1 saturation conduction moment by large electric current, and damage light-coupled isolation device U1, therefore, the resistance of resistance R 6 will be far smaller than the resistance of resistance R 3.
When the control module of communication apparatus is not sent control signal PWRCtrl, be that signal isolation control circuit 32 is during without input signal, the anode on the former limit of light-coupled isolation device U1 is pulled to low level by resistance R 8, the cut-off of the light-coupled isolation device U1 secondary CE utmost point, MOSFET pipe Q1 conducting in the power supply soft-start circuit 31, the load that power supply soft-start circuit 31 is opened as veneer powers on.
In the present embodiment, the core devices of the device of control veneer power-on and power-off is light-coupled isolation device U1 and the pipe of the MOSFET in the power supply soft-start circuit 31 Q1 of signal isolation control circuit 32.Need to prove that MOSFET pipe Q1 is the part of existing input power soft-start circuit, not for realizing that electric control increases under the veneer.For realizing input power power-on and power-off control, the extra device that increases is light-coupled isolation device U1 and the peripheral element in the signal isolation control circuit 32 in the communication apparatus.In the situation of not considering light-coupled isolation device U1, MOSFET pipe Q1 just is used for consisting of power supply soft-start circuit 31, and is irrelevant with electric control function under the power supply of the device of control veneer power-on and power-off.
The circuit theory diagrams of the device of another control veneer power-on and power-off that Fig. 4 provides for the embodiment of the invention.Described circuit comprises: power supply soft-start circuit 41 and signal isolation control circuit 42.Wherein RTN represents-return terminal of 48V, and GND represents signal ground.In the present embodiment, the power supply soft-start circuit 31 that power supply soft-start circuit 41 provides with above-mentioned embodiment.Signal isolation control circuit 42 adopts the type of drive of isolating transformer to control the MOSFET pipe Q1 of the N channel-type of power supply soft-start circuit 41.
Signal isolation control circuit 42 comprises isolating transformer T1 and control circuit thereof.The control circuit of isolating transformer T1 comprises: capacitor C 4, diode D3, triode Q2, driving resistance R 7, resistance R 6, filter capacitor C3.Capacitor C 4 one ends are connected to the former limit Same Name of Ends of isolating transformer T1, and the other end receives the control signal PWRCtrl from the communication apparatus control module.The secondary Same Name of Ends of the anodic bonding isolating transformer T1 of diode D3.Triode Q2 is the NPN type, and the base stage of triode Q2 is connected with the negative electrode of diode D3 by driving resistance R 7; The collector electrode of triode Q2 drives resistance R 4 by the grid that resistance R 6 connects MOSFET pipe Q1 in the power supply soft-start circuit 41.Filter capacitor C3 one end is connected with the node of the D3 negative electrode of resistance R 7 and diode, the emitter of other end connecting triode Q2.
In the present embodiment, control signal PWRCtrl is pulse signal, and capacitor C 4 is capacitance, prevents from losing efficacy because of saturated after isolating transformer T1 is by direct current.The pulse signal on the former limit of isolating transformer T1 is given secondary by isolating transformer T1, after pulse signal process diode D3 rectification, capacitor C 3 filtering, forms direct voltage.The direct voltage that forms drives triode Q2 by driving resistance R 7, and control MOSFET pipe Q1 turns on and off, and reaches the purpose of control veneer power-on and power-off.
The structural representation of the veneer that Fig. 5 provides for the embodiment of the invention.Described veneer comprises device 51 and the load 52 of control veneer power-on and power-off.The power-on and power-off of device 51 control loads 52 of control veneer power-on and power-off, the operation principle of the device 51 of control veneer power-on and power-off see above-mentioned Fig. 3, explanation embodiment illustrated in fig. 4 for details.
The structural representation of the communication apparatus that Fig. 6 provides for the embodiment of the invention.Described communication apparatus comprises control module 61 and veneer 62.Send control signal PWRCtrl in control module 61, veneer 62 power-on and power-off under the control of control signal PWRCtrl.Veneer 62 sees above-mentioned explanation embodiment illustrated in fig. 5 for details.
A kind of flow chart of controlling the method for veneer power-on and power-off that Fig. 7 provides for the embodiment of the invention.Described method comprises:
When the low-pressure side control signal was level signal, described low-pressure side control signal is converted to the high-pressure side control signal can be comprised: adopt the light-coupled isolation device that described control signal is converted to the high-pressure side control signal, see above-mentioned explanation embodiment illustrated in fig. 3 for details.
When the low-pressure side control signal was pulse signal, described low-pressure side control signal is converted to the high-pressure side control signal can be comprised: adopt isolating transformer that described control signal is converted to the high-pressure side control signal, see above-mentioned explanation embodiment illustrated in fig. 4 for details.
Said apparatus, veneer, Apparatus and method for embodiment, by increasing simple signal isolation control circuit in the existing power supply soft-start circuit of veneer periphery, utilize turning on and off of signal isolation control circuit control power supply soft-start circuit, thereby realized the power-on and power-off control of veneer.Simultaneously, the signal isolation control circuit of increase does not affect the original function of power supply soft-start circuit, realize that cost is low, reliability is high, and volume is little, conserve space.When control signal PWRCtrl lost efficacy or broke down, do not affect the normal operation of power supply soft-start circuit yet.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. a device of controlling the veneer power-on and power-off comprises the power supply soft-start circuit, it is characterized in that, also comprises:
The signal isolation control circuit, described signal isolation control circuit is connected with described power supply soft-start circuit;
Described signal isolation control circuit is used for the low-pressure side control signal is converted to the high-pressure side control signal, and isolates described low-pressure side control signal and high-pressure side control signal;
Described power supply soft-start circuit under the control of described high-pressure side control signal to Board Power up or lower electricity;
Wherein, described power supply soft-start circuit comprises N channel-type field effect transistor (Q1), voltage stabilizing didoe (D2), the first diode (D1), the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the first electric capacity (C1) and the second electric capacity (C2); The source electrode of N channel-type field effect transistor (Q1) is connected with the input power negative pole, and drain electrode is connected with veneer; One end of the 4th resistance (R4) is connected with the grid of N channel-type field effect transistor (Q1), and the other end is connected with the output of described isolation control circuit; Voltage stabilizing didoe (D2) is connected in parallel between the source electrode of the other end of the 4th resistance (R4) and N channel-type field effect transistor; Be connected in parallel after the series connection of the 5th resistance (R5) and the second electric capacity (C2) between the drain electrode of the other end of the 4th resistance (R4) and N channel-type field effect transistor; The first resistance (R1) and the first electric capacity (C1) the rear branch circuit parallel connection that forms of connecting with the second resistance (R2) in parallel is connected between input power positive pole and the input power negative pole; The negative electrode of the first diode (D1) is connected on the connected node of the first resistance (R1) and the second resistance (R2), and the anode of the first diode (D1) is connected with the other end of the 4th resistance (R4); The 3rd resistance (R3) is connected between the anode and input power positive pole of the first diode (D1);
Wherein, described signal isolation control circuit comprises:
Isolating transformer, the former limit of described isolating transformer is used for receiving described low-pressure side control signal;
Change-over circuit, described change-over circuit is connected with the secondary of described isolating transformer, is used for described low-pressure side control signal is converted to described high-pressure side control signal;
Wherein, described change-over circuit comprises:
Electric capacity (C4), an end are connected to the former limit Same Name of Ends of described isolating transformer, and the other end receives the control signal PWRCtrl from the communication apparatus control module;
Diode, the anode of described diode links to each other with the secondary Same Name of Ends of described isolating transformer;
Filter capacitor, an end of described filter capacitor is connected with the negative electrode of described diode, and the other end is connected with the secondary different name end of described isolating transformer;
Drive resistance, an end of described driving resistance is connected with the negative electrode of described diode;
Triode, the base stage of described triode is connected with the other end of described driving resistance, the grid of field effect transistor drives resistance and is connected in collector electrode and the described power supply soft-start circuit, and the source electrode of field effect transistor is connected in the secondary different name end of emitter and described isolating transformer and the described power supply soft-start circuit.
2. the device of control veneer according to claim 1 power-on and power-off is characterized in that, described change-over circuit also comprises: current-limiting resistance; The collector electrode of described triode is connected with the grid driving resistance of field effect transistor in the described power supply soft-start circuit by described current-limiting resistance.
3. a veneer is characterized in that, comprising: the device of each described control veneer power-on and power-off among the claims 1-2.
4. a communication apparatus is characterized in that, comprising: the claims 3 described veneers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910089980 CN101989852B (en) | 2009-07-30 | 2009-07-30 | Single board, communication equipment, device for controlling power on/off of single board and method thereof |
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|---|---|---|---|
| CN 200910089980 CN101989852B (en) | 2009-07-30 | 2009-07-30 | Single board, communication equipment, device for controlling power on/off of single board and method thereof |
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| CN101989852A CN101989852A (en) | 2011-03-23 |
| CN101989852B true CN101989852B (en) | 2013-01-02 |
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| CN102324923B (en) * | 2011-08-18 | 2017-05-24 | 广东新岸线计算机系统芯片有限公司 | Level shift circuit |
| CN102420706B (en) * | 2011-12-15 | 2014-04-02 | 福建星网锐捷网络有限公司 | Management board in switch and switch |
| CN103182944B (en) * | 2011-12-30 | 2015-03-25 | 上海汽车集团股份有限公司 | Power-up and power-down management method of hybrid electric vehicle |
| CN103929169B (en) * | 2013-01-16 | 2017-09-29 | 大族激光科技产业集团股份有限公司 | Sensor output level isolation change-over circuit, level isolation change-over circuit and equipment |
| JP6393470B2 (en) * | 2013-10-23 | 2018-09-19 | 日立オートモティブシステムズ株式会社 | Sensor device |
| CN204241867U (en) * | 2014-11-13 | 2015-04-01 | 中兴通讯股份有限公司 | A kind of power-on and power-off control device |
| CN105141120A (en) * | 2015-10-16 | 2015-12-09 | 兰州空间技术物理研究所 | Magnetic isolation power-on circuit |
| CN107404221A (en) * | 2017-07-31 | 2017-11-28 | 深圳市菲菱科思通信技术股份有限公司 | Power supply slow switch circuit |
| CN108055028A (en) * | 2018-02-02 | 2018-05-18 | 深圳市欧深特信息技术有限公司 | A kind of delay startup controllable power switch of multi-functional unification |
| CN108414948A (en) * | 2018-02-08 | 2018-08-17 | 深圳高科新农技术有限公司 | A kind of power supply monitoring system and unmanned plane for unmanned plane |
| CN113691115B (en) * | 2021-08-24 | 2023-06-06 | 烽火通信科技股份有限公司 | Dual-drive power supply slow start circuit |
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| CN2678252Y (en) * | 2004-01-14 | 2005-02-09 | 曹骥 | MOS DC solid-state relay |
| CN2879538Y (en) * | 2005-11-24 | 2007-03-14 | 杭州华为三康技术有限公司 | Electric power module for single board |
| EP1819046A1 (en) * | 2006-02-10 | 2007-08-15 | Thomson Licensing S.A. | Power supply apparatus with improved slope of supply voltage and respective circuit arrangement |
| CN201222650Y (en) * | 2008-06-20 | 2009-04-15 | 石家庄博发科技有限公司 | Apparatus for monitoring and protecting power distribution of transformer house |
Also Published As
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| CN101989852A (en) | 2011-03-23 |
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