CN115268329A

CN115268329A - Optical module and power supply voltage monitoring and compensating method thereof

Info

Publication number: CN115268329A
Application number: CN202210910230.6A
Authority: CN
Inventors: 杨世海; 原文强; 曲一帆; 赵嘉会; 张强
Original assignee: Hisense Broadband Multimedia Technology Co Ltd
Current assignee: Hisense Broadband Multimedia Technology Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-11-01

Abstract

The application provides an optical module and a power supply voltage monitoring and compensating method of the optical module, wherein the optical module comprises a circuit board, a slow start MOS (metal oxide semiconductor) tube, a voltage monitoring circuit and an MCU (micro control unit), wherein a power supply and power consumption golden finger is arranged on the circuit board, and the power consumption golden finger is connected to a first voltage and a second voltage in a time-sharing manner; the slow start MOS tube is electrically connected with the power supply gold finger, and the voltage monitoring circuit monitors the output voltage of the slow start MOS tube; the MCU comprises a first register, a second register and a third register, wherein the first register and the second register are respectively stored with a first voltage compensation table and a second voltage compensation table, when the power consumption golden finger is connected with a first voltage or a second voltage, the MCU acquires the output voltage of the slow start MOS tube, acquires the first voltage compensation table or the second voltage compensation table from the first register or the second register, performs voltage compensation on the output voltage according to the first voltage compensation table or the second voltage compensation table, and stores the compensated voltage into the third register for reporting. According to the method and the device, the power supply voltage is compensated and reported correspondingly when different power consumptions are consumed, so that the optical module is powered on normally to work.

Description

Optical module and power supply voltage monitoring and compensating method thereof

Technical Field

The application relates to the technical field of optical communication, in particular to an optical module and a power supply voltage monitoring and compensating method of the optical module.

Background

With the development of new services and application modes such as cloud computing, mobile internet, video and the like, the development and progress of optical communication technology become increasingly important. In the optical communication technology, an optical module is a tool for realizing the interconversion of optical signals, and is one of the key components in optical communication equipment, and with the development requirement of the optical communication technology, the transmission rate of the optical module is continuously increased.

When the optical module is powered on to work, the upper computer provides power supply voltage for the optical module through the golden finger, and the photoelectric element in the optical module is powered on to be started under different working voltages, so that the power supply voltage value provided by the golden finger needs to be monitored. The optical module has two working modes, namely a low power consumption mode and a high power consumption mode, so that the monitored attenuation of the power supply voltage is different due to different power supply currents when the optical module is in the low power consumption mode and the high power consumption mode, the monitored voltage deviation is larger, and the power-on work of the optical module is influenced.

Disclosure of Invention

The embodiment of the application provides an optical module and a power supply voltage monitoring compensation method of the optical module, and aims to solve the problem that power supply voltage monitoring deviation of the optical module is large due to different voltage attenuation amounts in different power consumption modes.

In a first aspect, the present application provides an optical module, comprising:

the circuit board is provided with a golden finger, the golden finger comprises a power supply golden finger and a power consumption golden finger, the power supply golden finger is connected with a power supply voltage, the power consumption golden finger is connected with a first voltage and a second voltage in a time-sharing mode, and the first voltage is larger than the second voltage;

the slow start MOS tube is arranged on the circuit board and is electrically connected with the power supply golden finger;

the voltage monitoring circuit is connected with the slow start MOS tube and is used for monitoring the output voltage of the slow start MOS tube;

the MCU is arranged on the circuit board and is connected with the slow start MOS tube, the power consumption golden finger and the voltage monitoring circuit; the golden finger protection circuit comprises a first register, a second register and a third register, wherein the first register stores a first voltage compensation table, the second register stores a second voltage compensation table, and the third register is in communication connection with the golden finger through an IIC communication bus;

when the power consumption golden finger is connected to the first voltage, the MCU acquires the output voltage of the slow start MOS tube from the voltage monitoring circuit, acquires the first voltage compensation table from the first register, performs voltage compensation on the output voltage of the slow start MOS tube according to the first voltage compensation table, and stores the compensated voltage in the third register for reporting;

when the power consumption golden finger is connected to the second voltage, the MCU acquires the output voltage of the slow start MOS tube from the voltage monitoring circuit, acquires the second voltage compensation table from the second register, performs voltage compensation on the output voltage of the slow start MOS tube according to the second voltage compensation table, and stores the compensated voltage to the third register for reporting.

In a second aspect, the present application provides a method for monitoring and compensating a supply voltage of an optical module, which is applied to the optical module in the first aspect, and the method includes:

acquiring the output voltage of a slowly-started MOS (metal oxide semiconductor) tube connected with a power supply golden finger;

the power consumption golden finger is switched into a first voltage and a second voltage in a time-sharing manner;

detecting the voltage of the power consumption gold finger;

when the power consumption golden finger is connected with a first voltage, the MCU acquires the output voltage of the slow start MOS tube, acquires a first voltage compensation table from a first register, performs voltage compensation on the output voltage of the slow start MOS tube according to the first voltage compensation table, and reports the compensated voltage;

when the power consumption golden finger is connected with a second voltage, the MCU acquires the output voltage of the slow start MOS tube, acquires a second voltage compensation table from a second register, performs voltage compensation on the output voltage of the slow start MOS tube according to the second voltage compensation table, and reports the compensated voltage.

As can be seen from the above embodiments, the optical module provided in the embodiments of the present application includes a circuit board, a slow start MOS transistor, a voltage monitoring circuit, and an MCU, where a gold finger is disposed on the circuit board, the gold finger includes a power supply gold finger and a power consumption gold finger, the power supply gold finger is connected to a power supply voltage, the power consumption gold finger is connected to a first voltage and a second voltage in a time-sharing manner, and the first voltage is greater than the second voltage, so as to inform a power consumption mode of the optical module through the first voltage and the second voltage, and inform the MCU that the optical module is in a high power consumption mode when the power consumption gold finger is connected to the first voltage, and inform the MCU that the optical module is in a low power consumption mode when the power consumption gold finger is connected to the second voltage; the slow start MOS tube is arranged on the circuit board and is electrically connected with the power supply golden finger so as to carry out slow start on the electronic component in the optical module and prevent the electronic component from being electrified and overshot; the voltage monitoring circuit is connected with the slow start MOS tube and is used for monitoring the output voltage of the slow start MOS tube, and the voltage attenuation caused by the slow start MOS tube is different due to different power supply currents of the optical module in different power consumption modes, so that the output voltage of the slow start MOS tube needs to be monitored; the MCU is arranged on the circuit board, is electrically connected with the slow start MOS tube and is used for electrifying and starting; the MCU is connected with the power consumption golden finger and is used for determining a power consumption mode according to the voltage accessed by the power consumption golden finger so as to control the on and off of electronic components in the optical module according to the power consumption mode; the MCU is connected with the voltage monitoring circuit and is used for acquiring the output voltage of the slow start MOS tube; the MCU also comprises a first register, a second register and a third register, wherein the first register stores a first voltage compensation table, and the first voltage compensation table corresponds to voltage attenuation in a high power consumption mode; the second register stores a second voltage compensation table corresponding to the voltage attenuation in the low power consumption mode; when the power consumption golden finger is connected with a first voltage, the optical module is in a high power consumption mode, the MCU acquires the output voltage of the slow start MOS tube from the voltage monitoring circuit, acquires a first voltage compensation table from the first register, performs voltage compensation on the output voltage of the slow start MOS tube according to the first voltage compensation table, and stores the compensated voltage to the third register; when the power consumption golden finger is connected with a second voltage, the optical module is in a low power consumption mode, the MCU acquires the output voltage of the slow start MOS tube from the voltage monitoring circuit, acquires a second voltage compensation table from a second register, performs voltage compensation on the output voltage of the slow start MOS tube according to the second voltage compensation table, and stores the compensated voltage to a third register; after the compensated voltage is stored in the third register, the upper computer can read the compensated voltage value from the third register through the IIC communication bus so as to determine the power supply voltage value provided to the optical module by the upper computer through the power supply golden finger. According to the method, the electronic component needing to be powered on and started is electrically connected with the power supply golden finger through the slow start MOS tube, the output voltage of the slow start MOS tube is monitored, corresponding voltage compensation is carried out on the output voltage of the slow start MOS tube when the optical module is in different power consumption modes, the compensated voltage is reported to the upper computer, the power supply voltage provided for the optical module by the upper computer is determined, the power supply voltage provided for the optical module can be guaranteed, and the optical module is normally powered on and works.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

FIG. 1 is a connection diagram of an optical communication system according to some embodiments;

FIG. 2 is a block diagram of a light module according to some embodiments;

FIG. 3 is a block diagram of a light module according to some embodiments;

FIG. 4 is a partially exploded schematic view of a light module according to some embodiments;

fig. 5 is a schematic structural diagram of a circuit board in an optical module according to an embodiment of the present disclosure;

fig. 6 is a first schematic block diagram of MCU voltage compensation in an optical module according to an embodiment of the present disclosure;

fig. 7 is a first structural block diagram of a circuit board in an optical module according to an embodiment of the present disclosure;

fig. 8 is a schematic block diagram of MCU voltage compensation in an optical module according to an embodiment of the present application;

fig. 9 is a structural block diagram of a circuit board in an optical module according to an embodiment of the present application;

fig. 10 is a flowchart of a method for monitoring and compensating a supply voltage of an optical module according to an embodiment of the present application.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

In an optical communication system, an optical signal is used to carry information to be transmitted, and the optical signal carrying the information is transmitted to information processing equipment such as a computer through information transmission equipment such as an optical fiber or an optical waveguide, so as to complete information transmission. Since light has a passive transmission characteristic when transmitted through an optical fiber or an optical waveguide, low-cost, low-loss information transmission can be realized. Since a signal transmitted by an information transmission device such as an optical fiber or an optical waveguide is an optical signal and a signal that can be recognized and processed by an information processing device such as a computer is an electrical signal, it is necessary to perform interconversion between the electrical signal and the optical signal in order to establish information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer.

The optical module realizes the function of interconversion between the optical signal and the electrical signal in the technical field of optical communication. The optical module comprises an optical port and an electric port, the optical module realizes optical communication with information transmission equipment such as optical fibers or optical waveguides and the like through the optical port, realizes electric connection with an optical network terminal (such as an optical modem) through the electric port, and the electric connection is mainly used for power supply, I2C signal transmission, data information transmission, grounding and the like; the optical network terminal transmits the electric signal to the information processing equipment such as a computer through a network cable or a wireless fidelity (Wi-Fi).

Fig. 1 is a connection diagram of an optical communication system. As shown in fig. 1, the optical communication system includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101, and a network cable 103.

One end of the optical fiber 101 is connected to the remote server 1000, and the other end is connected to the optical network terminal 100 through the optical module 200. The optical fiber itself can support long-distance signal transmission, for example, signal transmission of thousands of meters (6 km to 8 km), on the basis of which if a repeater is used, theoretically infinite distance transmission can be realized. Therefore, in a typical optical communication system, the distance between the remote server 1000 and the optical network terminal 100 may be several kilometers, tens of kilometers, or hundreds of kilometers.

One end of the network cable 103 is connected to the local information processing device 2000, and the other end is connected to the optical network terminal 100. The local information processing device 2000 may be any one or several of the following devices: router, switch, computer, cell-phone, panel computer, TV set etc..

The physical distance between the remote server 1000 and the optical network terminal 100 is greater than the physical distance between the local information processing apparatus 2000 and the optical network terminal 100. The connection between the local information processing apparatus 2000 and the remote server 1000 is made by the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is completed by the optical module 200 and the optical network terminal 100.

The optical module 200 includes an optical port configured to access the optical fiber 101 and an electrical port, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101; the electrical port is configured to be accessed into the optical network terminal 100, so that the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. The optical module 200 converts an optical signal and an electrical signal to each other, so that an information connection is established between the optical fiber 101 and the optical network terminal 100. For example, an optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input to the optical network terminal 100, and an electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input to the optical fiber 101. Since the optical module 200 is a tool for implementing the interconversion between the optical signal and the electrical signal, and has no function of processing data, information is not changed in the above-mentioned photoelectric conversion process.

The optical network terminal 100 includes a housing (housing) having a substantially rectangular parallelepiped shape, and an optical module interface 102 and a network cable interface 104 provided on the housing. The optical module interface 102 is configured to access the optical module 200, so that the ont 100 establishes a bidirectional electrical signal connection with the optical module 200; the network cable interface 104 is configured to access the network cable 103 such that the optical network terminal 100 establishes a bi-directional electrical signal connection with the network cable 103. The optical module 200 is connected to the network cable 103 via the optical network terminal 100. For example, the optical network terminal 100 transmits the electrical signal from the optical module 200 to the network cable 103, and transmits the electrical signal from the network cable 103 to the optical module 200, so that the optical network terminal 100 can monitor the operation of the optical module 200 as an upper computer of the optical module 200. The upper computer of the Optical module 200 may include an Optical Line Terminal (OLT) and the like in addition to the Optical network Terminal 100.

The remote server 1000 establishes a bidirectional signal transmission channel with the local information processing device 2000 through the optical fiber 101, the optical module 200, the optical network terminal 100, and the network cable 103.

Fig. 2 is a configuration diagram of the optical network terminal, and fig. 2 only shows a configuration of the optical module 200 of the optical network terminal 100 in order to clearly show a connection relationship between the optical module 200 and the optical network terminal 100. As shown in fig. 2, the optical network terminal 100 further includes a circuit board 105 disposed within the housing, a cage 106 disposed on a surface of the circuit board 105, a heat sink 107 disposed on the cage 106, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access an electrical port of the optical module 200; the heat sink 107 has a projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into a cage 106 of the optical network terminal 100, the cage 106 holds the optical module 200, and heat generated by the optical module 200 is conducted to the cage 106 and then diffused by a heat sink 107. After the optical module 200 is inserted into the cage 106, the electrical port of the optical module 200 is connected to the electrical connector inside the cage 106, so that the optical module 200 is connected to the optical network terminal 100 by a bidirectional electrical signal. Further, the optical port of the optical module 200 is connected to the optical fiber 101, and the optical module 200 establishes bidirectional optical signal connection with the optical fiber 101.

Fig. 3 is a block diagram of a light module according to some embodiments, and fig. 4 is an exploded view of a light module according to some embodiments. As shown in fig. 3 and 4, the optical module 200 includes a housing (shell), and a circuit board 300 and an optical transceiver module disposed in the housing.

The shell comprises an upper shell 201 and a lower shell 202, wherein the upper shell 201 is covered on the lower shell 202 to form the shell with two openings; the outer contour of the housing generally appears square.

In some embodiments of the present disclosure, the lower housing 202 includes a bottom plate and two lower side plates located at both sides of the bottom plate and disposed perpendicular to the bottom plate; the upper case 201 includes a cover plate covering both lower side plates of the lower case 202 to form the above case.

In some embodiments, the lower housing 202 includes a bottom plate and two lower side plates disposed at both sides of the bottom plate and perpendicular to the bottom plate; the upper housing 201 includes a cover plate and two upper side plates located at two sides of the cover plate and perpendicular to the cover plate, and the two upper side plates are combined with the two lower side plates to cover the upper housing 201 on the lower housing 202.

The direction of the connecting line of the two

openings

204 and 205 may be the same as the length direction of the optical module 200, or may not be the same as the length direction of the optical module 200. For example, the opening 204 is located at an end portion (right end in fig. 3) of the optical module 200, and the opening 205 is also located at an end portion (left end in fig. 3) of the optical module 200. Alternatively, the opening 204 is located at an end of the optical module 200, and the opening 205 is located at a side of the optical module 200. The opening 204 is an electrical port, and the gold finger 301 of the circuit board 300 extends out of the electrical port and is inserted into an upper computer (for example, the optical network terminal 100); the opening 205 is an optical port configured to access the external optical fiber 101, so that the external optical fiber 101 is connected to an optical transceiver module inside the optical module 200.

The upper shell 201 and the lower shell 202 are combined to facilitate the installation of devices such as the circuit board 300 and the optical transceiver module into the shell, and the upper shell 201 and the lower shell 202 form encapsulation protection for the devices. In addition, when the circuit board 300, the optical transceiver module and other devices are assembled, the positioning components, the heat dissipation components and the electromagnetic shielding components of the devices are convenient to arrange, and the automatic production is facilitated.

In some embodiments, the upper housing 201 and the lower housing 202 are generally made of metal materials, which is beneficial to achieve electromagnetic shielding and heat dissipation.

In some embodiments, the optical module 200 further includes an unlocking part 203 located outside the housing thereof, and the unlocking part 203 is configured to realize a fixed connection between the optical module 200 and the upper computer or release the fixed connection between the optical module 200 and the upper computer.

Illustratively, the unlocking member 203 is located on the outer walls of the two lower side plates of the lower housing 202, and has a snap-fit member that mates with a host cage (e.g., the cage 106 of the optical network terminal 100). When the optical module 200 is inserted into the cage of the upper computer, the optical module 200 is fixed in the cage of the upper computer by the engaging member of the unlocking member 203; when the unlocking member 203 is pulled, the engaging member of the unlocking member 203 moves along with the unlocking member, and the connection relationship between the engaging member and the upper computer is changed, so that the engagement relationship between the optical module 200 and the upper computer is released, and the optical module 200 can be drawn out from the cage of the upper computer.

The circuit board 300 includes circuit traces, electronic components, and chips, and the electronic components and the chips are connected together by the circuit traces according to a circuit design to implement functions of power supply, electrical signal transmission, grounding, and the like. Examples of the electronic components include capacitors, resistors, transistors, and Metal-Oxide-Semiconductor Field-Effect transistors (MOSFETs). The chip includes, for example, a Micro Controller Unit (MCU), a laser driving chip, a limiting amplifier (limiting amplifier), a Clock and Data Recovery (CDR) chip, a power management chip, and a Digital Signal Processing (DSP) chip.

The circuit board 300 is generally a rigid circuit board, which can also perform a bearing function due to its relatively rigid material, for example, the rigid circuit board can stably bear the electronic components and chips; when the optical transceiver component is positioned on the circuit board, the rigid circuit board can also provide smooth bearing; the rigid circuit board can also be inserted into an electric connector in the cage of the upper computer.

The circuit board 300 further includes a gold finger 301 formed on an end surface thereof, the gold finger 301 being composed of a plurality of pins independent of each other. The circuit board 300 is inserted into the cage 106 and electrically connected to the electrical connector in the cage 106 by the gold fingers 301. The gold finger 301 may be disposed on only one side surface (e.g., the upper surface shown in fig. 4) of the circuit board 300, or may be disposed on both upper and lower surfaces of the circuit board 300, so as to adapt to the situation where the requirement of the number of pins is large. The gold finger 301 is configured to establish an electrical connection with an upper computer to implement power supply, grounding, I2C signal transfer, data signal transfer, and the like.

Of course, a flexible circuit board is also used in some optical modules. Flexible circuit boards are commonly used in conjunction with rigid circuit boards to supplement the rigid circuit boards. For example, a flexible circuit board may be used to connect the rigid circuit board and the optical transceiver module.

The optical transceiver module may include an optical transmitter module 400 and an optical receiver module 500, the optical transmitter module 400 is connected to the circuit board 300, for example, a laser driver chip is disposed on the circuit board 300, one end of the laser driver chip may be electrically connected to the gold finger 301, and the other end of the laser driver chip may be connected to a laser in the optical transmitter module 400, so as to drive the laser to generate an optical signal for electrical-optical conversion; the light receiving assembly 500 is connected to the circuit board 300, the light receiving assembly 500 converts an optical signal transmitted by an external optical fiber into an electrical signal, and the electrical signal is transmitted to the gold finger 301 through a wire, so as to implement photoelectric conversion.

When the optical module is powered on to work, the upper computer provides power supply voltage for the optical module through the golden finger, and the photoelectric element in the optical module is powered on to be started under different working voltages, so that the power supply voltage value provided by the golden finger needs to be monitored. The existing protocol has two working modes for the optical module, namely a low power consumption mode and a high power consumption mode, and requires that the power consumption in the low power consumption mode is less than 1.5W. Due to the fact that the optical module is in a low power consumption mode and a high power consumption mode, the power supply currents are different, so that the monitored attenuation amount of the power supply voltage is different, the monitored voltage deviation is large, the power supply voltage provided by the upper computer to the optical module through the golden finger is deviated, and the power-on work of the optical module is influenced.

In order to solve the problem, the voltage compensation is performed on the power supply voltage monitored by the optical module under different power consumptions so as to compensate different attenuation amounts of the optical module under different power consumptions, and therefore the problem of large voltage monitoring deviation caused by different attenuation amounts under different power consumption modes is solved.

Fig. 5 is a schematic view of a partial structure of a circuit board in an optical module according to an embodiment of the present application. As shown in fig. 5, in the optical module provided in the embodiment of the present application, the gold fingers 301 disposed on the circuit board 300 include a power supply gold finger 302 and a power consumption gold finger 303, the power supply gold finger 302 is connected to a power supply voltage provided by the upper computer, the power consumption gold finger 303 is connected to a first voltage and a second voltage in a time-sharing manner, the first voltage is greater than the second voltage, and the power consumption gold finger 303 informs that the optical module is in the high power consumption mode or the low power consumption mode according to the connected voltage. Thus, when the power consumption golden finger 303 is connected to the first voltage, the optical module is informed of being in the high power consumption mode; when the power consumption golden finger 303 is connected to the second voltage, the optical module is informed of being in the low power consumption mode.

In some embodiments, when the power consumption golden finger 303 is connected to a first voltage, it indicates that the optical module is in a high power consumption mode, and the first voltage is 3.3V; when the power consumption golden finger 303 is connected to the second voltage, it indicates that the optical module is in the low power consumption mode, and the second voltage is 0 to 3V.

Because the photoelectric components in the optical module are powered on and started under different working voltages, in order to determine the power supply voltage accessed by the power supply golden finger 302, the working voltages of the different photoelectric components need to be monitored through the monitoring circuit, and then the working voltages are reported to the upper computer, so that the power supply voltage is determined by feeding back the working voltages of the photoelectric components.

In some embodiments, for a module or system capable of hot plug, a load needs to be added to a power input port to provide a slow start circuit, which is an important component of a power supply and is an interface circuit between an external power supply and an internal functional module, and can alleviate impact on the internal circuit at the moment of power supply and filter noise of the external power supply to ensure reliable operation of the internal functional module.

The conventional slow start circuit is a slow start MOS Transistor (Metal-Oxide-Semiconductor-Effect Transistor), after power is supplied, a power supply charges the MOS Transistor until the MOS Transistor reaches a threshold voltage and is turned on, and the slow start delay time is the time for the power supply to charge the MOS Transistor and reach an MOS turn-on threshold, so that the power supply can slowly start the internal circuit by power supply.

Therefore, in order to avoid overshooting of electronic components in the optical module during power-on starting, the optical module generally comprises a slow-start MOS transistor, one end of the slow-start MOS transistor is electrically connected with the power supply golden finger 302, the other end of the slow-start MOS transistor is electrically connected with the electronic components, and thus, the power supply voltage accessed by the power supply golden finger 302 powers on the electronic components after the power supply golden finger 302 is slowly started.

Because the output voltage of the soft start MOS tube is the same as the power supply voltage of the electronic component, the output voltage of the soft start MOS tube can be monitored in order to monitor the power supply voltage of the electronic component, and therefore the optical module further comprises a voltage monitoring circuit which is connected with the soft start MOS tube and used for monitoring the output voltage of the soft start MOS tube so as to obtain the power supply voltage of the electronic component.

The circuit board 300 is further provided with an MCU310, and the MCU310 is electrically connected with the power supply golden finger 302 through a slow start MOS tube, so that the MCU310 is powered on and started; the power consumption golden finger 303 is connected with the MCU310 of the optical module to transmit a power consumption identifier to the MCU310 according to the voltage accessed by the power consumption golden finger 303, and the MCU310 controls the on-off of the photoelectric element in the optical module according to the power consumption identifier, so that the optical module is in a corresponding power consumption mode.

If the power consumption golden finger 303 is connected with the first voltage, the upper computer informs that the optical module is in a high power consumption mode, at the moment, the MCU310 is connected with the high power consumption identifier transmitted by the power consumption golden finger 303, and the MCU310 controls all related photoelectric components to be started, so that the optical module is in the high power consumption mode; when the power consumption golden finger 303 is connected with the second voltage, the upper computer informs that the optical module is in the low power consumption mode, at the moment, the MCU310 is connected with the low power consumption identification transmitted by the power consumption golden finger 303, the MCU310 controls all relevant photoelectric components to be closed, and the output voltage of the electric components is 0, so that the optical module is in the low power consumption mode.

In order to perform voltage compensation on the power supply voltage of the optical module in different power consumption modes, the MCU310 includes a first register and a second register, the first register stores a first voltage compensation table, and the first voltage compensation table corresponds to a voltage attenuation amount in a high power consumption mode; the second register stores a second voltage compensation table corresponding to the voltage attenuation amount in the low power consumption mode.

Therefore, when the power consumption golden finger 303 is connected to the first voltage, it is indicated that the optical module is in a high power consumption mode, at this time, the MCU310 obtains the output voltage of the soft-start MOS transistor from the voltage monitoring circuit, obtains the first voltage compensation table from the first register, performs voltage compensation on the output voltage of the soft-start MOS transistor according to the first voltage compensation table, and reports the compensated voltage to the upper computer.

When the power consumption golden finger 303 is connected to the second voltage, it is indicated that the optical module is in the low power consumption mode, at this time, the MCU310 obtains the output voltage of the soft-start MOS transistor from the voltage monitoring circuit, obtains the second voltage compensation table from the second register, performs voltage compensation on the output voltage of the soft-start MOS transistor according to the second voltage compensation table, and reports the compensated voltage to the upper computer.

Because the upper computer belongs to the active device, and the optical module belongs to the slave device, namely the upper computer can send information to the optical module and read information from the optical module, and the optical module can only receive information from the upper computer and cannot actively send information to the upper computer. Therefore, in order to report the compensated voltage to the upper computer, the MCU310 further includes a third register, where the third register is used to store the compensated power supply voltage value, and the third register is in communication connection with the upper computer through the IIC communication bus. Therefore, the upper computer can read the compensated voltage value from the third register through the IIC communication bus to report the compensated power supply voltage value to the upper computer, so that the upper computer determines the power supply voltage provided for the optical module, the power supply voltage provided for the optical module by the upper computer is ensured, and the optical module is normally electrified to work.

However, when the output voltage of the soft start MOS transistor is monitored to monitor the operating voltage of the electronic component connected to the soft start MOS transistor, a voltage monitoring circuit needs to be provided in the optical module, which increases the number of electric components in the optical module, resulting in a complicated structure of the optoelectronic component in the optical module. The MCU can monitor the power supply voltage of the MCU, and the power supply voltage of the MCU can be obtained without additionally arranging a voltage monitoring circuit, so that the power supply voltage provided by the upper computer can be directly determined by feeding back the power supply voltage of the MCU, and the number of photoelectric components in the optical module is reduced.

Fig. 6 is a first schematic block diagram of MCU voltage compensation in an optical module according to an embodiment of the present disclosure, and fig. 7 is a first structural block diagram of a circuit board in an optical module according to an embodiment of the present disclosure. As shown in fig. 6 and 7, the MCU310 is electrically connected to the power supply golden finger 302 through a soft start MOS transistor, the MCU310 is in signal connection with the power consumption golden finger 303, a power supply voltage received by the power supply golden finger 302 is delayed by the soft start MOS transistor to power on the MCU310, and the power consumption golden finger 303 informs the optical module that the optical module is in a high power consumption mode or a low power consumption mode according to the received first voltage or second voltage.

In order to monitor the power supply voltage of the MCU310 itself, the MCU310 further includes a sampling circuit, the sampling circuit is configured to collect the power supply voltage of the MCU310, that is, the power supply voltage transmitted to the MCU310 through the soft-start MOS transistor by the power supply gold finger 302, and the sampling circuit collects the power supply voltage reaching the MCU310 because the power supply voltage of the MCU310 is smaller than the power supply voltage connected to the power supply gold finger 302 due to the attenuation of the line voltage.

After the power supply voltage of the MCU310 is collected by the sampling circuit, the power supply voltage of the MCU310 is lower than the power supply voltage of the power supply golden finger 302 due to the attenuation of the line voltage, so that the power supply voltage of the MCU310 needs to be compensated to reduce the influence of the attenuation of the line voltage on the power supply voltage in order to obtain the power supply voltage value of the power supply golden finger 302.

Due to the fact that the optical module is in the low power consumption mode and the high power consumption mode, the supply currents are different, so that the attenuation amount of the line voltage is different, and the monitored supply voltage of the MCU310 is deviated when the optical module is in the low power consumption mode and the high power consumption mode. In order to solve the problem of large voltage monitoring deviation caused by different attenuation amounts in the two modes, when the optical module is in the high power consumption mode, the MCU310 may acquire the first voltage compensation table from the first register, and perform voltage compensation on the acquired supply voltage of the MCU310 according to the first voltage compensation table, so as to compensate for voltage attenuation in the high power consumption mode.

When the optical module is in the low power consumption mode, the MCU310 may obtain a second voltage compensation table from the second register, and perform voltage compensation on the acquired supply voltage of the MCU310 according to the second voltage compensation table, so as to compensate for voltage attenuation in the low power consumption mode.

When the optical module is in a low power consumption mode or a high power consumption mode, the attenuation of the slowly started MOS tube is different. Specifically, when the optical module is in the high power consumption mode, since the power consumption is very high at this time, the attenuation of the slow start MOS transistor is large, and the deviation between the power supply voltage reaching the MCU310 and the power supply voltage accessed by the power supply gold finger 302 is large, for example, the voltage deviation is 0.6 to 0.7V. The voltage deviation can be compensated by the voltage value of the first voltage compensation table, namely the voltage compensation value in the first voltage compensation table is 0.6-0.7V.

When the optical module is in a low power consumption mode, because the power consumption is low at this time, the attenuation of the slow start MOS transistor is small, and the deviation between the power supply voltage reaching the MCU310 and the power supply voltage accessed by the power supply gold finger 302 is small, for example, the voltage deviation is 0 to 0.1V. The voltage deviation can be compensated by the voltage value of the second voltage compensation table, namely the voltage compensation value in the second voltage compensation table is 0-0.1V.

In some embodiments, the power supply voltage provided by the upper computer to the optical module is generally 3.3V, that is, the power supply voltage connected to the power supply gold finger 302 is generally 3.3V, and the power supply voltage may be adjusted by the feedback compensated MCU power supply voltage.

In some embodiments, the voltage compensation value in the first voltage compensation table may be greater than or less than the voltage attenuation of the optical module in the high power consumption mode, and the voltage compensation value in the second voltage compensation table may be greater than or less than the voltage attenuation of the optical module in the low power consumption mode, which allows a deviation value of 3%, so that when the power supply voltage provided by the upper computer is 3.3V, the voltage value compensated by the power supply voltage of the MCU310 may be 3.2 to 3.4V.

In some embodiments, the power supply current in the optical module is not only affected by the power consumption mode, but also affected by the ambient temperature in the optical module, that is, the power consumption mode and the ambient temperature of the optical module both affect the attenuation of the line voltage in the optical module, so the ambient temperature needs to be considered when compensating the power supply voltage of the MCU 310.

Fig. 8 is a second schematic block diagram of MCU voltage compensation in an optical module according to an embodiment of the present application, and fig. 9 is a second structural block diagram of a circuit board in the optical module according to the embodiment of the present application. As shown in fig. 8 and 9, the MCU310 is electrically connected to the power supply golden finger 302 through the soft start MOS transistor, the MCU310 is in signal connection with the power consumption golden finger 303, the power supply voltage accessed by the power supply golden finger 302 is delayed by the soft start MOS transistor to power on the MCU310, and the power consumption golden finger 303 informs the MCU310 that the optical module is in the high power consumption mode or the low power consumption mode according to the accessed first voltage or second voltage.

Since the ambient temperature in the optical module affects the attenuation of the line voltage, the MCU310 further includes a temperature sensor, the temperature sensor is configured to collect the ambient temperature, and the first register stores a first temperature-voltage compensation table, which stores first voltage compensation values corresponding to different ambient temperatures in the high power consumption mode; the second register stores a second temperature-voltage compensation table, and the second temperature-voltage compensation table stores second voltage compensation values corresponding to the low-power-consumption mode and different environmental temperatures.

In some embodiments, when the optical module is in the high power consumption mode, the first voltage compensation value in the first temperature-voltage compensation table is set in one-to-one correspondence with the ambient temperature, that is, the first voltage compensation value in the first temperature-voltage compensation table may be different at different ambient temperatures, and the MCU310 needs to perform corresponding voltage compensation on the acquired power supply voltage according to the ambient temperature.

When the optical module is in the low power consumption mode, the second voltage compensation value in the second temperature-voltage compensation table is set in one-to-one correspondence with the ambient temperature, that is, the second voltage compensation value in the second temperature-voltage compensation table may be different at different ambient temperatures, and the MCU310 needs to perform corresponding voltage compensation on the collected power supply voltage according to the ambient temperature.

In some embodiments, when the ambient temperature in the optical module is not changed and the optical module is in different power consumption modes, the first voltage compensation value in the first temperature and voltage compensation table is different from the second voltage compensation value in the second temperature and voltage compensation table, and the MCU310 needs to perform corresponding voltage compensation on the collected power supply voltage according to the power consumption mode.

After the collected power supply voltage of the MCU310 is subjected to voltage compensation by the first voltage compensation value or the second voltage compensation value, the compensated power supply voltage needs to be reported to the upper computer, and the upper computer determines the provided power supply voltage according to the reported power supply voltage, so as to maintain the power supply voltage provided to the optical module, thereby ensuring that the optical module is normally powered on.

The optical module provided by the embodiment of the application comprises a circuit board and an MCU (microprogrammed control unit), wherein the circuit board is provided with a golden finger, the golden finger comprises a power supply golden finger and a power consumption golden finger, the power supply golden finger is connected to a power supply voltage, and the power consumption golden finger is connected to a first voltage and a second voltage in a time-sharing mode so as to inform that the optical module is in a high power consumption mode or a low power consumption mode; the MCU is arranged on the circuit board and is electrically connected with the power supply golden finger through the slow start MOS tube so as to access power supply voltage transmitted by the power supply golden finger, so that the MCU is powered on and started; the MCU is connected with the power consumption golden finger so as to enable the optical module to be in different power consumption modes according to the voltage accessed by the power consumption golden finger, if the power consumption golden finger is accessed to a first voltage, the MCU is informed that the optical module is in a high power consumption mode, and when the power consumption golden finger is accessed to a second voltage, the MCU is informed that the optical module is in a low power consumption mode; the sampling circuit is used for collecting the power supply voltage of the MCU, and the attenuation quantity of the voltage is different due to different power supply currents in different power consumption modes, so that the collected MCU power supply voltage is smaller than the power supply voltage accessed by a power supply golden finger; the first register stores a first voltage compensation table corresponding to voltage attenuation in a high power consumption mode; the second register stores a second voltage compensation table corresponding to the voltage attenuation in the low power consumption mode; when the power consumption golden finger is connected with a first voltage, the optical module is in a high power consumption mode, the MCU acquires a first voltage compensation table from the first register, and voltage compensation is carried out on the acquired MCU power supply voltage according to the first voltage compensation table; when the power consumption golden finger is connected with a second voltage, the optical module is in a low power consumption mode, the MCU acquires a second voltage compensation table from a second register, and voltage compensation is carried out on the acquired MCU power supply voltage according to the second voltage compensation table; the MCU performs corresponding voltage compensation on the acquired MCU power supply voltage according to the power consumption mode, and then stores the compensated power supply voltage into a third register, the third register is connected with an upper computer through an IIC communication bus, and the upper computer can read the compensated power supply voltage value from the third register through the IIC communication bus so as to determine the power supply voltage value provided for the optical module by the upper computer through the power supply golden finger. The power supply voltage of the MCU is monitored, corresponding voltage compensation is carried out on the power supply voltage of the MCU when the optical module is in different power consumption modes, the power supply voltage of the MCU is reported to the upper computer after corresponding voltage compensation is carried out on the power supply voltage of the MCU, the power supply voltage provided for the optical module by the upper computer is determined, the power supply voltage provided for the optical module by the upper computer is guaranteed, and the optical module is normally electrified to work.

Based on the optical module described in the above embodiment, the embodiment of the present application further provides a power supply voltage monitoring compensation method for the optical module, and the method is applied to the optical module described in the above embodiment to solve the problem of large voltage monitoring deviation caused by different attenuation amounts in two power consumption modes of the optical module.

Fig. 10 is a flowchart of a power supply voltage monitoring compensation method for an optical module according to an embodiment of the present application. As shown in fig. 10, the method for monitoring and compensating the power supply voltage of the optical module provided by the present application includes:

s100: and acquiring the output voltage of the slowly-started MOS tube connected with the power supply golden finger.

In order to avoid overshoot of electronic components in the optical module when the optical module is powered on and started, the optical module generally comprises a slow start MOS transistor, one end of the slow start MOS transistor is electrically connected with the power supply golden finger 302, and the other end of the slow start MOS transistor is electrically connected with the electronic components, so that the electronic components are powered on after power supply voltage accessed by the power supply golden finger 302 passes through the slow start MOS transistor.

Since the output voltage of the soft start MOS transistor is the same as the power supply voltage of the electronic component, the output voltage of the soft start MOS transistor can be monitored in order to monitor the power supply voltage of the electronic component.

S200: and connecting the power consumption golden finger to the first voltage and the second voltage in a time-sharing manner.

S300: and detecting the voltage of the power consumption gold finger.

Connecting the power consumption golden finger with the MCU, accessing the power consumption golden finger with a first voltage and a second voltage in a time-sharing manner, wherein the first voltage is higher than the second voltage, so as to inform the MCU of the power consumption mode according to the voltage accessed by the power consumption golden finger, and if the power consumption golden finger is accessed with the first voltage, indicating that the MCU needs to be in a high power consumption mode; when the power consumption golden finger is connected to the second voltage, the MCU is required to be in a low power consumption mode.

S401: when the power consumption golden finger is connected to the first voltage, the MCU acquires the output voltage of the soft start MOS tube and acquires a first voltage compensation table from the first register.

S402: and performing voltage compensation on the output voltage of the soft start MOS tube according to the first voltage compensation table.

S403: and reporting the compensated voltage.

Due to the fact that the optical module is in the low power consumption mode and the high power consumption mode, the supply currents are different, so that the attenuation amount of line voltage is different, and the monitored supply voltage is deviated when the optical module is in the low power consumption mode and the high power consumption mode. In order to solve the problem of large voltage monitoring deviation caused by different attenuation amounts in two modes, the MCU further comprises a first register and a second register, wherein the first register stores a first voltage compensation table, and the first voltage compensation table is a voltage attenuation amount of the optical module in a high power consumption mode.

Therefore, when the power consumption golden finger is connected with the first voltage, the optical module is in a high power consumption mode, the power consumption is very high at the moment, the slow start attenuation is large, the deviation between the output voltage of the slow start MOS tube and the actually given power supply voltage is large, the MCU acquires the output voltage of the slow start MOS tube, acquires the first voltage compensation table from the first register, and performs voltage compensation on the output voltage of the slow start MOS tube according to the first voltage compensation table.

And reporting the compensated power supply voltage to an upper computer, and determining and adjusting the power supply voltage provided by the upper computer according to the reported power supply voltage, so that the power supply voltage provided for the optical module is maintained, and the optical module is ensured to be normally powered on to work.

S411: when the power consumption golden finger is connected with a second voltage, the MCU acquires the output voltage of the soft start MOS tube and acquires a second voltage compensation table from a second register.

S412: and performing voltage compensation on the output voltage of the soft start MOS tube according to a second voltage compensation table.

S413: and reporting the compensated voltage.

And a second voltage compensation table is stored in a second register of the MCU, and the second voltage compensation table is a voltage attenuation amount of the optical module in a low power consumption mode.

Therefore, when the power consumption golden finger is connected with the second voltage, the optical module is in a low power consumption mode, the power consumption is low at the moment, the slow starting attenuation is reduced, the deviation between the output voltage of the slow starting MOS tube and the actually given power supply voltage is small, the MCU obtains the output voltage of the slow starting MOS tube, the second voltage compensation table is obtained from the second register, and the voltage compensation is carried out on the output voltage of the slow starting MOS tube according to the second voltage compensation table.

Because MCU can monitor self supply voltage, need not additionally to set up voltage monitoring circuit and just can acquire MCU's supply voltage, consequently can confirm the mains voltage that the host computer provided through the supply voltage who feeds back MCU directly. When the optical module is in a high power consumption mode, the MCU can acquire a first voltage compensation table from the first register and perform voltage compensation on the acquired power supply voltage of the MCU according to the first voltage compensation table so as to compensate voltage attenuation in the high power consumption mode; when the optical module is in the low power consumption mode, the MCU can acquire a second voltage compensation table from the second register, and voltage compensation is performed on the acquired power supply voltage of the MCU according to the second voltage compensation table so as to compensate voltage attenuation in the low power consumption mode.

The power supply voltage of the MCU is monitored, corresponding voltage compensation is carried out on the power supply voltage of the MCU through different voltage compensation meters when the optical module is in different power consumption modes, the power supply voltage of the MCU is reported to the upper computer after corresponding voltage compensation is carried out on the power supply voltage of the MCU, the power supply voltage provided for the optical module by the upper computer is determined, and therefore the power supply voltage provided for the optical module is guaranteed, and the optical module is normally electrified to work.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A light module, comprising:

2. The light module of claim 1, wherein the MCU further comprises a sampling circuit for collecting a supply voltage of the MCU; and the MCU performs voltage compensation according to the power supply voltage acquired by the sampling circuit and the first voltage compensation meter or the second voltage compensation meter.

3. The optical module according to claim 1, wherein the first voltage is 3.3V, and the second voltage is 0 to 3V.

4. The optical module according to claim 1, wherein the voltage compensation value in the first voltage compensation table is 0.6 to 0.7V.

5. The optical module according to claim 1, wherein the voltage compensation value in the second voltage compensation table is 0 to 0.1V.

6. The optical module according to claim 1, wherein a voltage value obtained by compensating for the voltage output from the soft start MOS transistor is 3.2 to 3.4V.

7. The light module of claim 1, wherein the MCU further comprises a temperature sensor for acquiring an ambient temperature;

when the power consumption golden finger is connected to the first voltage, the MCU acquires a first voltage compensation value corresponding to the environment temperature from the first register, performs voltage compensation on the power supply voltage of the MCU according to the first voltage compensation value, and reports the compensated power supply voltage;

when the power consumption golden finger is connected to the second voltage, the MCU acquires a second voltage compensation value corresponding to the environment temperature from the second register, performs voltage compensation on the power supply voltage of the MCU according to the second voltage compensation value, and reports the compensated power supply voltage.

8. The optical module according to claim 7, wherein when the power consumption gold finger is connected to the first voltage or the second voltage, the voltage compensation value in the first voltage compensation table is set in one-to-one correspondence with the ambient temperature.

9. The optical module according to claim 7, wherein the voltage compensation value in the first voltage compensation table is different from the voltage compensation value in the second voltage compensation table when the ambient temperature is constant.

10. A method for monitoring and compensating a power supply voltage of an optical module, which is applied to the optical module of any one of claims 1 to 9, the method comprising:

acquiring output voltage of a slow start MOS tube connected with a power supply golden finger;

the power consumption golden finger is connected to a first voltage and a second voltage in a time-sharing mode;

detecting the voltage of the power consumption gold finger;