QSFP-DDQSFP-DD800 module power supply protection circuit

Abstract

The utility model discloses a QSFP-DDQSFP-DD800 module power supply protection circuit, which is characterized in that an input power supply is connected with a voltage input end of a load switch, a voltage output end of the load switch is connected with a power supply pin of a protected optical module, an enabling end of the load switch is electrically connected with a first end of a programmable device, and the first end of the programmable device drives the load switch to enable; the load switch detects the working current of the protected optical module and outputs the working current through the current output end of the load switch, and the current output end of the load switch is connected with the programmable device through the analog-to-digital conversion circuit to serve as the second end of the current detection pin; the ModPrsL pin of the protected optical module is connected with the third end of the programmable device, and the ModPrsL pin outputs a switching signal for protecting whether the test board exists in the optical module or not; and the IntL pin of the protected optical module is connected with the fourth end of the programmable device, and outputs a switching signal indicating whether the protected optical module is abnormal or not. According to the utility model, the power supply safety problem of the pluggable module to the communication interface board card is solved.

Description

Technical Field

[0001] The utility model relates to a power supply protection circuit, in particular to a QSFP-DD\QSFP-DD800 module power supply protection circuit. Background Art

[0002] As QSFP-DD\QSFP-DD800 is gradually widely used in the interface of communication equipment, it quickly occupied the communication market due to its advantages such as high speed, small size and pluggable. However, the application of pluggable modules will challenge the power supply safety of communication interface boards. If an optical module with mismatched power or damaged is inserted into the communication interface board, it will cause communication service interruption and board damage. The current main solution is to add a fuse to the QSFP-DD\QSFP-DD800 power inlet and directly blow the fuse when a problem occurs. However, this method does not fundamentally solve the problem. After the fuse blows, it is difficult for the system to accurately know the cause of the power failure, and the board needs to be returned to the factory for repair to reactivate the port. Summary of the invention

[0003] The utility model solves the risk brought by the QSFP-DD\QSFP-DD800 pluggable module to the communication interface card circuit and provides a QSFP-DD\QSFP-DD800 module power supply protection circuit.

[0004] The technical solution adopted by the utility model is:

[0005] The QSFP-DD\QSFP-DD800 module power supply protection circuit includes a programmable device and a load switch electrically connected to the programmable device and a protected optical module; the input power supply is connected to the voltage input end of the load switch, the voltage output end of the load switch is connected to the power pin of the protected optical module, the load switch has an enable end and a current output end, the enable end of the load switch is electrically connected to the first end of the programmable device, and the first end of the programmable device drives the load switch to enable; the load switch detects the working current of the protected optical module and outputs it through the current output end of the load switch, and the current output end of the load switch is connected to the second end of the programmable device as the current detection pin through the analog-to-digital conversion circuit; the ModPrsL pin of the protected optical module is connected to the third end of the programmable device, and the ModPrsL pin outputs a switch signal of whether the protection optical module has a test board; the IntL pin of the protected optical module is connected to the fourth end of the programmable device, and the IntL pin outputs a switch signal of whether the protected optical module is abnormal.

[0006] Furthermore, the protected optical module is a QSFP-DD800, QSFP-DD, QSFP112 or QSFP56 QSFP module.

[0007] Furthermore, the protected optical module is connected to the programmable device for data communication via an I2C interface; the I2C interface includes an SDA pin and an SCL pin, the SDA pin is used to transmit data, and the SCL pin is used to synchronize data transmission and reception. The SDA pin and the SCL pin of the protected optical module are connected to the SDA pin and the SCL pin of the programmable device in a one-to-one correspondence.

[0008] Furthermore, the programmable device has a built-in current comparison unit, which performs threshold comparison on the detected current and generates a switch signal, and then the programmable device outputs a switch signal.

[0009] Furthermore, the programmable device is FPGA or CPLD.

[0010] Furthermore, the load switch adopts the MP5092 chip of MPS Company.

[0011] Furthermore, the programmable device is connected to an LED indicator light. Specifically, the programmable device outputs a driving signal based on the state signal of the protected optical module to control the LED indicator light to switch and display.

[0012] Furthermore, the LED indicator light is a red and green dual-color indicator light.

[0013] Furthermore, the programmable device is also connected to a host computer, and the host computer is interconnected with the programmable device through a system controller bus, and the host computer obtains an interrupt signal through an interrupt pin of the programmable device.

[0014] The utility model adopts the above technical solution, and the programmable device detects the QSFP-DD\QSFP-DD800 current through the load switch, and receives the working status of the QSFP-DD\QSFP-DD800 module through the I2C interface. When the working current of the QSFP-DD\QSFP-DD800 is too large or a serious alarm occurs in the QSFP-DD\QSFP-DD800, the programmable device triggers the load switch to cut off the power supply of the QSFP-DD\QSFP-DD800. The utility model detects the unplugging of the problem module and the insertion of the replacement module through the Module_Presen signal provided by the ModPrsL pin of the protected optical module, and then restores the power supply. The utility model solves the problem that the current application of QSFP-DD\QSFP-DD800 pluggable modules poses a challenge to the power supply safety of the communication interface board, and solves the problem that the damaged optical module damages the interface board, causing business interruption and board damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods;

[0016] Figure 1This is a structural block diagram of the power supply protection circuit of the QSFP-DD\QSFP-DD800 module of the utility model;

[0017] Figure 2 It is a schematic diagram of the working principle of the utility model. Implementation

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0019] like Figure 1 As shown, the utility model discloses a QSFP-DD\QSFP-DD800 module power supply protection circuit, which includes a programmable device and a load switch and a protected optical module connected to the programmable device; the input power supply is connected to the voltage input end of the load switch, the voltage output end of the load switch is connected to the power pin of the protected optical module, the load switch has an enable end and a current output end, the enable end of the load switch is electrically connected to the first end of the programmable device, and the first end of the programmable device drives the load switch to enable; the load switch detects the working current of the protected optical module and outputs it through the current output end of the load switch, and the current output end of the load switch is connected to the second end of the programmable device as the current detection pin through an analog-to-digital conversion circuit; the ModPrsL pin of the protected optical module is connected to the third end of the programmable device, and the ModPrsL pin outputs a switch signal of whether the protection optical module has a test board; the IntL pin of the protected optical module is connected to the fourth end of the programmable device, and the IntL pin outputs a switch signal of whether the protected optical module is abnormal.

[0020] Furthermore, the protected optical module is a QSFP-DD800, QSFP-DD, QSFP112 or QSFP56 QSFP module.

[0021] Furthermore, the protected optical module is connected to the programmable device for data communication via an I2C interface so that the programmable device can read the model information of the protected optical module; the I2C interface includes an SDA pin and an SCL pin, the SDA pin is used to transmit data, and the SCL pin is used to synchronize data transmission and reception. The SDA pin and the SCL pin of the protected optical module are connected to the SDA pin and the SCL pin of the programmable device in a one-to-one correspondence.

[0022] Furthermore, the programmable device has a built-in current comparison unit, which performs threshold comparison on the detected current and generates a switch signal, and then the programmable device outputs a switch signal.

[0023] Furthermore, the programmable device is FPGA or CPLD.

[0024] Furthermore, the load switch adopts the MP5092 chip of MPS Company.

[0025] Specifically, in view of the maximum current of 15A in the QSFP-DD\QSFP-DD800 working current range, and at the same time making the circuit not need to occupy too much wiring area of ​​the board as much as possible, the MP5092 chip of MPS company was selected to complete the working current detection and power switch function in the circuit.

[0026] Furthermore, the programmable device is connected to an LED indicator light. Specifically, the programmable device outputs a driving signal based on the state signal of the protected optical module to control the LED indicator light to switch and display.

[0027] Furthermore, the LED indicator light is a red and green dual-color indicator light.

[0028] Furthermore, the programmable device is also connected to a host computer, and the host computer is interconnected with the programmable device through a system controller bus, and the host computer obtains an interrupt signal through an interrupt pin of the programmable device.

[0029] The load switch of the utility model mainly completes the real-time detection function of the working current of QSFP-DD\QSFP-DD800. And the power supply of QSFP-DD\QSFP-DD800 is turned on or off according to the control signal output by the programmable device. The programmable device reads the model, current, alarm, and insertion and removal status of the optical module through the relevant pins. In addition, as a programmable device, it can be configured to determine whether to control the opening or shutting down of the power supply of the optical module based on the read optical module information and report and display the real-time status. The FPGA or CPLD of the circuit completes the optical module alarm in-position status acquisition, control logic, and status reporting and display functions, that is, the function LED adopts red and green dual colors to identify the working status, green represents normal operation, and red represents an alarm. In addition, as an expansion supplement, the red flashing frequency can be used to calibrate the level.

[0030] Specifically, the protection circuit continuously detects the Module_present signal of QSFP-DD through the corresponding pin of FPGA or CPLD in the initial state (detection start state machine). When the QSFP-DD module is inserted into the system (Module_present=0), the specific model information of QSFP-DD\QSFP-DD800 is read through FPGA or CPLD. When the obtained module information matches the preset, the state machine migrates to the QSFP-DD module detection state machine, otherwise it enters the module protection state and turns off the power supply of QSFP-DD.

[0031] The optical module status detection state machine confirms the maximum current value of the module according to the specific QSFP-DD model. After that, the working current of QSFP-DD\QSFP-DD800 is obtained in real time through MP5092 during the working process, and the alarm information of the optical module such as RX_Fault is obtained through FPGA or CPLD. If it is found that the current exceeds the preset configuration value, or a serious working status alarm occurs, the control unit immediately shuts off the power supply of QSFP-DD, and reports to the system by interrupting the INT signal combined with the system controller bus, and lights up the alarm light. The state machine mode is maintained until the problematic QSFP-DD is unplugged (Module_present=1) and then a new QSFP-DD is inserted (Module_present=0).

[0032] The utility model adopts the above technical solution, and the programmable device detects the QSFP-DD\QSFP-DD800 current through the load switch, and receives the working status of the QSFP-DD\QSFP-DD800 module through the I2C interface. When the working current of the QSFP-DD\QSFP-DD800 is too large or a serious alarm occurs in the QSFP-DD\QSFP-DD800, the programmable device triggers the load switch to cut off the power supply of the QSFP-DD\QSFP-DD800. The utility model detects the unplugging of the problem module and the insertion of the replacement module through the Module_Presen signal provided by the ModPrsL pin of the protected optical module, and then restores the power supply. The utility model solves the problem that the current application of QSFP-DD\QSFP-DD800 pluggable modules poses a challenge to the power supply safety of the communication interface board, and solves the problem that the damaged optical module damages the interface board, causing business interruption and board damage.

[0033] Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The components of the embodiments of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present application is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians of the art without making creative work are within the scope of protection of the present application.

Claims

1. QSFP-DD\QSFP-DD800 module power supply protection circuit, characterized by: It includes a programmable device, a load switch electrically connected to the programmable device, and a protected optical module; the input power supply is connected to the voltage input terminal of the load switch, the voltage output terminal of the load switch is connected to the power pin of the protected optical module, the load switch has an enable terminal and a current output terminal, the enable terminal of the load switch is electrically connected to the first terminal of the programmable device, and the first terminal of the programmable device drives the load switch to enable; The load switch detects the working current of the protected optical module and outputs it through the current output end of the load switch. The current output end of the load switch is connected to the second end of the programmable device as the current detection pin through the analog-to-digital conversion circuit; the ModPrsL pin of the protected optical module is connected to the third end of the programmable device, and the ModPrsL pin outputs a switch signal of whether the protection optical module exists in the test board; the IntL pin of the protected optical module is connected to the fourth end of the programmable device, and the IntL pin outputs a switch signal of whether the protected optical module is abnormal.

2. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The protected optical module is a QSFP-DD800, QSFP-DD, QSFP112 or QSFP56 QSFP module.

3. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The protected optical module is connected to the programmable device for data communication via an I2C interface; the I2C interface includes an SDA pin and an SCL pin, the SDA pin is used for transmitting data, and the SCL pin is used for synchronous data transmission and reception.

4. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The programmable device has a built-in current comparison unit, which performs a threshold comparison on the detected current and generates a switch signal, and then the programmable device outputs a switch signal.

5. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The programmable device is FPGA or CPLD.

6. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The load switch uses the MP5092 chip from MPS.

7. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The programmable device is connected to an LED indicator light. Specifically, the programmable device outputs a driving signal based on a status signal of the protected optical module to control the LED indicator light to switch and display.

8. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The LED indicator light is red and green.

9. The QSFP-DD\QSFP-DD800 module power supply protection circuit according to claim 1, characterized in that: The programmable device is also connected to a host computer, which is interconnected with the programmable device through a system controller bus, and the host computer obtains an interrupt signal through an interrupt pin of the programmable device.

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