CN210745446U - Power-on slow start control device for Ethernet switch expansion daughter card - Google Patents
Power-on slow start control device for Ethernet switch expansion daughter card Download PDFInfo
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- CN210745446U CN210745446U CN201922428139.7U CN201922428139U CN210745446U CN 210745446 U CN210745446 U CN 210745446U CN 201922428139 U CN201922428139 U CN 201922428139U CN 210745446 U CN210745446 U CN 210745446U
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Abstract
The utility model discloses an electric control device that slowly starts on ethernet switch extension daughter card, include: the circuit comprises a board card interface circuit, an overvoltage and overcurrent circuit, a slow start delay circuit, an MOS tube switch circuit, a primary switch control circuit and a secondary switch control circuit; the utility model provides an ethernet switch extension daughter card self go up the problem that the electric process needs a slow starting drive.
Description
Technical Field
The utility model relates to the field of communication, concretely relates to electric control device that slowly starts on ethernet switch extension daughter card.
Background
The FS5300 series of switches are home-made autonomous controllable switch devices, and the series of products adopt a hardware architecture composed of advanced autonomous controllable core devices in the industry, and use a multilayer switch chip, a home-made CPU chip and a home-made autonomous operating system. The FS5300 series switch provides high-performance L2/L3/L4 line speed switching service for users, and ensures the uninterrupted communication capability of the network for the longest time by combining a plurality of high-reliability technologies.
The Ethernet switch expansion daughter card is an expansion card designed based on FS5300 series switches, the external connector interface is an SFP + optical cage, the type of the externally provided data interface is SFI, and the Ethernet switch expansion daughter card is designed for expanding the port number of the switch and providing larger forwarding capacity. 4 10GE ports or 2 40GE ports may be provided.
The ethernet switch extended daughter card itself needs to be hot-plugged. If directly power on, the voltage that switch itself supplied power can be drawn down to increase the daughter card load suddenly, and secondly, the voltage during contact can be unstable, and unstable can lead to extension daughter card inner module work unusual, slowly starts the process that has a capacitor energy storage for the voltage is more gentle.
SUMMERY OF THE UTILITY MODEL
The aforesaid is not enough to prior art, the utility model provides a pair of slow starting drive on ethernet switch extension daughter card has solved the problem that the electric process needs a slow starting drive on ethernet switch extension daughter card self.
In order to achieve the purpose of the invention, the utility model adopts the technical scheme that: a power-on slow start control device for an Ethernet switch expansion daughter card comprises: the circuit comprises a board card interface circuit, an overvoltage and overcurrent circuit, a slow start delay circuit, an MOS tube switch circuit, a primary switch control circuit and a secondary switch control circuit;
the board card interface circuit is respectively connected with the overvoltage and overcurrent circuit and the primary switch control circuit;
the overvoltage and overcurrent circuit is respectively connected with the slow start delay circuit and the primary switch control circuit;
the slow start time delay circuit is also respectively connected with the MOS tube switch circuit and the secondary switch control circuit;
and the secondary switch control circuit is also connected with the primary switch control circuit.
Further: the board card interface circuit includes: an interface CON1 and a ground resistor R0;
a 1 st pin of the interface CON1 is used as a VCCIN — 12V end of the board card interface circuit; the 2 nd pin is connected with a grounding resistor R0; and the 3 rd pin of the circuit board is used as the SUB PWR EN end of the board card interface circuit.
Further: the overvoltage and overcurrent circuit comprises: fuse F1 and TVS tube D1;
one end of the fuse F1 is used as a VCCIN-12V end of the overvoltage and overcurrent circuit, and the other end of the fuse F1 is connected with the negative electrode of the TVS tube D1 and is used as the output end of the overvoltage and overcurrent circuit;
the anode of the TVS tube D1 is grounded;
and the VCCIN-12V end of the overvoltage and overcurrent circuit is connected with the VCCIN-12V end of the board card interface circuit.
Further: the slow start delay circuit comprises: a resistor R6, a resistor R5 and a capacitor C3;
one end of the resistor R6 is connected with one end of the capacitor C3 and serves as an input end of the slow start delay circuit, and the other end of the resistor R5 is connected with the other end of the capacitor C3 and serves as a first output end of the slow start delay circuit;
the other end of the resistor R5 is used as a second output end of the slow start delay circuit;
and the input end of the slow start time delay circuit is connected with the output end of the overvoltage overcurrent circuit.
Further: the MOS transistor switching circuit comprises: the circuit comprises a switching diode D2, a resistor R7, a MOS transistor Q3, a resistor R8, a capacitor C4 and a resistor R9;
the source electrode of the MOS tube Q3 is used as the first input end of the MOS tube switch circuit, and the grid electrode of the MOS tube Q3 is connected with one end of a resistor R7;
the other end of the resistor R7 is respectively connected with the cathode of the switch diode D2, one end of the resistor R9 and one end of the capacitor C4;
the anode of the switching diode D2 is used as a second input end of the MOS tube switching circuit;
the other end of the resistor R9 is used as a third input end of the MOS tube switching circuit;
the drain electrode of the MOS transistor Q3 is connected with one end of a resistor R8 and is used as the output end of the MOS transistor switching circuit;
the other end of the resistor R8 is connected with the other end of the capacitor C4;
the first input end of the MOS tube switching circuit is connected with the input end of the slow start delay circuit;
the second input end of the MOS tube switching circuit is connected with the first output end of the slow start delay circuit;
and a third input end of the MOS tube switching circuit is connected with a second output end of the slow start delay circuit.
Further: further comprising: a ground capacitor C5 and a ground capacitor C6;
the output end of the MOS tube switch circuit is respectively connected with the grounding capacitor C5, the grounding capacitor C6 and the VCCIN-12V end of the board card interface circuit.
Further: the primary switch control circuit includes: a grounding capacitor C1, a resistor R1 and a triode Q1;
the base electrode of the triode Q1 is connected with one end of the resistor R1, the collector electrode of the triode Q1 is used as the output end of the primary switch control circuit, and the emitter electrode of the triode Q1 is grounded;
the other end of the resistor R1 is connected with a grounding capacitor C1 and is used as the SUN PWR EN end of the primary switch control circuit;
and the SUN PWREN end of the primary switch control circuit is connected with the SUB PWR EN end of the board card interface circuit.
Further: the method comprises the following steps: a resistor R2;
and the output end of the overvoltage and overcurrent circuit is connected with the output end of the primary switch control circuit through a resistor R2.
Further: the secondary switch control circuit includes: a grounding capacitor C2, a grounding resistor R3, a resistor R4 and a triode Q2;
one end of the resistor R4 is respectively connected with a grounding capacitor C2 and a grounding resistor R3 and is used as the input end of the secondary switch control circuit;
the other end of the resistor R4 is connected with the base electrode of the triode Q2;
the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is used as the output end of the two-stage switch control circuit;
the input end of the secondary switch control circuit is connected with the output end of the primary switch control circuit;
and the output end of the secondary switch control circuit is connected with the second output end of the slow start delay circuit.
The utility model has the advantages that: the utility model provides an ethernet switch extension daughter card goes up slowly starting control device, protects the extension daughter card through excessive pressure overcurrent protection circuit, prevents that voltage and electric current are too big, removes the delay according to the signal of switch and opens the MOS pipe, through the energy storage process of electric capacity, removes the influence that prevents the voltage sudden change to the extension daughter card to reduced the burr that the MOS pipe produced in the twinkling of an eye, avoided output voltage's unstability, provide stable voltage for the extension daughter card.
Drawings
FIG. 1 is a system block diagram of a slow start control device on an Ethernet switch expansion daughter card;
FIG. 2 is a circuit diagram of a board interface circuit;
fig. 3 is a circuit diagram of a slow start control device on an ethernet switch expansion daughter card.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
As shown in fig. 1, a device for controlling slow start on an ethernet switch extended daughter card includes: the circuit comprises a board card interface circuit, an overvoltage and overcurrent circuit, a slow start delay circuit, an MOS tube switch circuit, a primary switch control circuit and a secondary switch control circuit;
the board card interface circuit is respectively connected with the overvoltage and overcurrent circuit and the primary switch control circuit;
the overvoltage and overcurrent circuit is respectively connected with the slow start delay circuit and the primary switch control circuit;
the slow start time delay circuit is also respectively connected with the MOS tube switch circuit and the secondary switch control circuit;
and the secondary switch control circuit is also connected with the primary switch control circuit.
As shown in fig. 2, the board interface circuit includes: an interface CON1 and a ground resistor R0;
a 1 st pin of the interface CON1 is used as a VCCIN — 12V end of the board card interface circuit; the 2 nd pin is connected with a grounding resistor R0; and the 3 rd pin of the circuit board is used as the SUB PWR EN end of the board card interface circuit.
The overvoltage and overcurrent circuit comprises: fuse F1 and TVS tube D1;
one end of the fuse F1 is used as a VCCIN-12V end of the overvoltage and overcurrent circuit, and the other end of the fuse F1 is connected with the negative electrode of the TVS tube D1 and is used as the output end of the overvoltage and overcurrent circuit;
the anode of the TVS tube D1 is grounded;
and the VCCIN-12V end of the overvoltage and overcurrent circuit is connected with the VCCIN-12V end of the board card interface circuit.
As shown in fig. 3, the slow start delay circuit includes: a resistor R6, a resistor R5 and a capacitor C3;
one end of the resistor R6 is connected with one end of the capacitor C3 and serves as an input end of the slow start delay circuit, and the other end of the resistor R5 is connected with the other end of the capacitor C3 and serves as a first output end of the slow start delay circuit;
the other end of the resistor R5 is used as a second output end of the slow start delay circuit;
and the input end of the slow start time delay circuit is connected with the output end of the overvoltage overcurrent circuit.
The MOS transistor switching circuit comprises: the circuit comprises a switching diode D2, a resistor R7, a MOS transistor Q3, a resistor R8, a capacitor C4 and a resistor R9;
the source electrode of the MOS tube Q3 is used as the first input end of the MOS tube switch circuit, and the grid electrode of the MOS tube Q3 is connected with one end of a resistor R7;
the other end of the resistor R7 is respectively connected with the cathode of the switch diode D2, one end of the resistor R9 and one end of the capacitor C4;
the anode of the switching diode D2 is used as a second input end of the MOS tube switching circuit;
the other end of the resistor R9 is used as a third input end of the MOS tube switching circuit;
the drain electrode of the MOS transistor Q3 is connected with one end of a resistor R8 and is used as the output end of the MOS transistor switching circuit;
the other end of the resistor R8 is connected with the other end of the capacitor C4;
the first input end of the MOS tube switching circuit is connected with the input end of the slow start delay circuit;
the second input end of the MOS tube switching circuit is connected with the first output end of the slow start delay circuit;
and a third input end of the MOS tube switching circuit is connected with a second output end of the slow start delay circuit.
Further comprising: a ground capacitor C5 and a ground capacitor C6;
the output end of the MOS tube switch circuit is respectively connected with the grounding capacitor C5, the grounding capacitor C6 and the VCCIN-12V end of the board card interface circuit.
The primary switch control circuit includes: a grounding capacitor C1, a resistor R1 and a triode Q1;
the base electrode of the triode Q1 is connected with one end of the resistor R1, the collector electrode of the triode Q1 is used as the output end of the primary switch control circuit, and the emitter electrode of the triode Q1 is grounded;
the other end of the resistor R1 is connected with a grounding capacitor C1 and is used as the SUN PWR EN end of the primary switch control circuit;
and the SUN PWR EN end of the primary switch control circuit is connected with the SUB PWR EN end of the board card interface circuit.
Further comprising: a resistor R2;
and the output end of the overvoltage and overcurrent circuit is connected with the output end of the primary switch control circuit through a resistor R2.
The secondary switch control circuit includes: a grounding capacitor C2, a grounding resistor R3, a resistor R4 and a triode Q2;
one end of the resistor R4 is respectively connected with a grounding capacitor C2 and a grounding resistor R3 and is used as the input end of the secondary switch control circuit;
the other end of the resistor R4 is connected with the base electrode of the triode Q2;
the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is used as the output end of the two-stage switch control circuit;
the input end of the secondary switch control circuit is connected with the output end of the primary switch control circuit;
and the output end of the secondary switch control circuit is connected with the second output end of the slow start delay circuit.
The control device for the slow start of the power-on of the extended daughter CARD of the Ethernet switch is a circuit designed for the power-on of the extended daughter CARD of the Ethernet switch, namely a part of the extended daughter CARD of the Ethernet switch, the extended daughter CARD of the Ethernet switch is inserted into an interface of the Ethernet switch through an interface CON1 of the control device, and a high-level signal CARD _ PRESENT of the Ethernet switch is connected to the ground through a grounding resistor R0 to be changed into a low-level signal; when the switch detects the low level signal, the switch may delay for a period of time T according to the requirement, and during the period of time T, the interface output of the switch connected to the 3 rd pin of the interface CON1 is at a high level.
The capacitor C1 is a bypass small capacitor at pF level for filtering high-frequency noise and burrs, the base electrode of the triode Q1 has voltage bias in T time, the emitting electrode of the triode Q1 is positively biased, the collecting electrode of the triode Q1 is reversely biased, the collecting electrode of the triode Q1 enters an amplifying region and is pulled down, the input end of the secondary switch control circuit inputs low level, the base electrode of the triode Q2 is low level, and the triode Q2 is cut off; the MOS tube switching circuit is in a high-resistance state, the grid electrode and the source electrode of the MOS tube Q3 can not reach the opening voltage, and the MOS tube switching circuit is in a closed state.
After T time, the interface connected to pin 3 of interface CON1 on the switch outputs low level, capacitor C1 discharges instantaneously, so as to avoid the transient voltage fluctuation from affecting the state change of transistor Q1 too fast, when the charge stored in capacitor C1 is released, the base of transistor Q1 no longer has voltage, the positive bias voltage of the emitter of transistor Q disappears, and transistor Q1 enters the cut-off region from the amplification region.
12V voltage of switch output charges to electric capacity C2 through pressing overcurrent circuit and resistance R2, avoids triode Q2 to open in the twinkling of an eye, electric capacity C2 is charged and is accomplished, triode Q2's base possesses voltage bias, and because resistance R3's existence, triode Q2's collector voltage is higher than the base level, triode Q2's emitter forward bias this moment, the collector reverse bias, triode Q2 gets into the amplification region by the cut-off region, triode Q2 is opened.
When the triode Q2 is turned on, the resistor R5 is grounded, the resistor R6 and the capacitor C3 form an RC circuit, the charging time value is determined by the values of the resistor R6 and the capacitor C3, and after charging is completed, the voltage of the anode of the switch diode D2 is obtained by voltage division through the resistor R6 and the resistor R5; at this time, the difference between the source voltage and the gate voltage of the MOS transistor Q3 becomes large, and the MOS transistor Q3 is turned on. In order to enable Vgs (relative voltage between a gate and a source) of the MOS transistor to stably exceed a turn-on threshold and adapt to different MOS transistor types, voltage division is performed by a switch diode D2 and a resistor R9, the model of the switch diode D2 is LL4148, after the MOS transistor passes through a switch diode D2, the gate voltage of Q3 of the MOS transistor is further reduced, and the value of a resistor R9 is far greater than the values of a resistor R5 and a resistor R6, so that the gate voltage of Q3 of the MOS transistor is approximate to the value of the voltage at the cathode of the switch diode D2. In order to avoid the overlarge voltage borne by the grid electrode, the grid electrode is connected with the negative electrode of the switching diode D2 in series through a resistor with a small resistance value.
In order to reduce the glitch generated instantaneously by the Q3 switch of the MOS transistor and avoid the oscillation of the rear stage caused by the slow opening of the MOS transistor Q3, the drain is connected in series to the negative electrode of the switching diode D2 by using the resistor R8 and the capacitor C4, so as to clamp the drain voltage (i.e., the drain voltage does not fluctuate too fast due to the existence of the resistor R8 and the capacitor C4), and the capacitance value of the capacitor C4 is pF level.
Finally, the voltage output by the drain of the MOS transistor Q3 is filtered and stored by the capacitor C5 and the capacitor C6, and after the noise waves of high frequency and low frequency are filtered, a stable and smooth output voltage can be obtained.
The utility model has the advantages that: the utility model provides an ethernet switch extension daughter card goes up slowly starting control device, protects the extension daughter card through excessive pressure overcurrent protection circuit, prevents that voltage and electric current are too big, removes the delay according to the signal of switch and opens the MOS pipe, through the energy storage process of electric capacity, removes the influence that prevents the voltage sudden change to the extension daughter card to reduced the burr that the MOS pipe produced in the twinkling of an eye, avoided output voltage's unstability, provide stable voltage for the extension daughter card.
Claims (9)
1. The utility model provides an ethernet switch extension daughter card power-on slow start control device which characterized in that includes: the circuit comprises a board card interface circuit, an overvoltage and overcurrent circuit, a slow start delay circuit, an MOS tube switch circuit, a primary switch control circuit and a secondary switch control circuit;
the board card interface circuit is respectively connected with the overvoltage and overcurrent circuit and the primary switch control circuit;
the overvoltage and overcurrent circuit is respectively connected with the slow start delay circuit and the primary switch control circuit;
the slow start time delay circuit is also respectively connected with the MOS tube switch circuit and the secondary switch control circuit;
and the secondary switch control circuit is also connected with the primary switch control circuit.
2. The ethernet switch extended daughter card power-up slow start control device of claim 1, wherein said board interface circuit comprises: an interface CON1 and a ground resistor R0;
a 1 st pin of the interface CON1 is used as a VCCIN — 12V end of the board card interface circuit; the 2 nd pin is connected with a grounding resistor R0; and the 3 rd pin of the circuit board is used as the SUB PWR EN end of the board card interface circuit.
3. The ethernet switch extended daughter card power-on slow-start control device of claim 2, wherein said over-voltage over-current circuit comprises: fuse F1 and TVS tube D1;
one end of the fuse F1 is used as a VCCIN-12V end of the overvoltage and overcurrent circuit, and the other end of the fuse F1 is connected with the negative electrode of the TVS tube D1 and is used as the output end of the overvoltage and overcurrent circuit;
the anode of the TVS tube D1 is grounded;
and the VCCIN-12V end of the overvoltage and overcurrent circuit is connected with the VCCIN-12V end of the board card interface circuit.
4. The Ethernet switch extended daughter card power-on slow-start control device of claim 3, wherein said slow-start delay circuit comprises: a resistor R6, a resistor R5 and a capacitor C3;
one end of the resistor R6 is connected with one end of the capacitor C3 and serves as an input end of the slow start delay circuit, and the other end of the resistor R5 is connected with the other end of the capacitor C3 and serves as a first output end of the slow start delay circuit;
the other end of the resistor R5 is used as a second output end of the slow start delay circuit;
and the input end of the slow start time delay circuit is connected with the output end of the overvoltage overcurrent circuit.
5. The Ethernet switch extended daughter card power-up slow start control device of claim 4, wherein said MOS tube switching circuit comprises: the circuit comprises a switching diode D2, a resistor R7, a MOS transistor Q3, a resistor R8, a capacitor C4 and a resistor R9;
the source electrode of the MOS tube Q3 is used as the first input end of the MOS tube switch circuit, and the grid electrode of the MOS tube Q3 is connected with one end of a resistor R7;
the other end of the resistor R7 is respectively connected with the cathode of the switch diode D2, one end of the resistor R9 and one end of the capacitor C4;
the anode of the switching diode D2 is used as a second input end of the MOS tube switching circuit;
the other end of the resistor R9 is used as a third input end of the MOS tube switching circuit;
the drain electrode of the MOS transistor Q3 is connected with one end of a resistor R8 and is used as the output end of the MOS transistor switching circuit;
the other end of the resistor R8 is connected with the other end of the capacitor C4;
the first input end of the MOS tube switching circuit is connected with the input end of the slow start delay circuit;
the second input end of the MOS tube switching circuit is connected with the first output end of the slow start delay circuit;
and a third input end of the MOS tube switching circuit is connected with a second output end of the slow start delay circuit.
6. The Ethernet switch extended daughter card power-up slow start control device of claim 5, further comprising: a ground capacitor C5 and a ground capacitor C6;
the output end of the MOS tube switch circuit is respectively connected with the grounding capacitor C5, the grounding capacitor C6 and the VCCIN-12V end of the board card interface circuit.
7. The Ethernet switch extended daughter card power-up slow start control device of claim 4, wherein said primary switch control circuit comprises: a grounding capacitor C1, a resistor R1 and a triode Q1;
the base electrode of the triode Q1 is connected with one end of the resistor R1, the collector electrode of the triode Q1 is used as the output end of the primary switch control circuit, and the emitter electrode of the triode Q1 is grounded;
the other end of the resistor R1 is connected with a grounding capacitor C1 and is used as the SUN PWR EN end of the primary switch control circuit;
and the SUN PWR EN end of the primary switch control circuit is connected with the SUB PWR EN end of the board card interface circuit.
8. The Ethernet switch extended daughter card power-up slow start control device of claim 6, further comprising: a resistor R2;
and the output end of the overvoltage and overcurrent circuit is connected with the output end of the primary switch control circuit through a resistor R2.
9. The Ethernet switch extended daughter card power-on slow-start control device of claim 4, wherein said secondary switch control circuit comprises: a grounding capacitor C2, a grounding resistor R3, a resistor R4 and a triode Q2;
one end of the resistor R4 is respectively connected with a grounding capacitor C2 and a grounding resistor R3 and is used as the input end of the secondary switch control circuit;
the other end of the resistor R4 is connected with the base electrode of the triode Q2;
the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is used as the output end of the two-stage switch control circuit;
the input end of the secondary switch control circuit is connected with the output end of the primary switch control circuit;
and the output end of the secondary switch control circuit is connected with the second output end of the slow start delay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922428139.7U CN210745446U (en) | 2019-12-27 | 2019-12-27 | Power-on slow start control device for Ethernet switch expansion daughter card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922428139.7U CN210745446U (en) | 2019-12-27 | 2019-12-27 | Power-on slow start control device for Ethernet switch expansion daughter card |
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| Publication Number | Publication Date |
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| CN210745446U true CN210745446U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922428139.7U Active CN210745446U (en) | 2019-12-27 | 2019-12-27 | Power-on slow start control device for Ethernet switch expansion daughter card |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115954836A (en) * | 2023-03-13 | 2023-04-11 | 电信科学技术第五研究所有限公司 | Power hot plug protection circuit of board card equipment based on current transformer |
-
2019
- 2019-12-27 CN CN201922428139.7U patent/CN210745446U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115954836A (en) * | 2023-03-13 | 2023-04-11 | 电信科学技术第五研究所有限公司 | Power hot plug protection circuit of board card equipment based on current transformer |
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