A power module

Abstract

The present invention provides a power module, including a CPCI power plug-in and a +5VSB power module, which is a power module that uses a CPCI power supply to replace an ATX power supply; the +5VSB power module and the CPCI power plug-in are both connected to an external power supply, and the +5VSB power module is used to convert the external power supply into a +5V power supply and output it. The CPCI standard power plug-in is used, which has a small volume and can greatly save equipment space, overcoming the defects in the prior art that the size of a common ATX power supply is generally large, and sufficient installation space and wire tie arrangement space need to be reserved in the chassis to facilitate the disassembly and assembly of the power module.

Description

Technical Field

[0001] The invention relates to a power supply module, in particular to a module power supply in a chassis, and in particular to a power supply module using a CPCI power supply plug-in to replace an ATX power supply. Background Art

[0002] In computer equipment, ATX power supply is used as the working power supply of the computer. Its function is to convert AC220V power supply into DC +3.3V, +5V, ±12V power supply required by the computer. In addition, it also provides two signals, +5VSB and PS-ON. These two signals reflect the characteristics of ATX power supply. The main features of ATX power supply are: 1) In addition to outputting the normal working power supply of each component, it also outputs a +5VSB standby power supply. When the entire system is in the shutdown and dormant state, the +5VSB power supply is still output normally and can provide working power for some internal control circuits; 2) External devices can remotely send wake-up commands to the dormant computer system through the network port, USB port or other interfaces. After receiving the wake-up command, the control circuit can control the ATX power supply to output an enable signal, so that the entire system can be powered on.

[0003] Most existing ATX power supplies are designed and produced in the form of modules, and are mainly used in ground-based computer equipment. The installation method is mainly to fix it in the host chassis with screws. The ATX power module has a standard interface, which is connected to other circuits through wire ties, and can output a level signal to inform other devices of the power supply working status. The ATX power module is equipped with a fan to dissipate heat from the power module. When repairing the ATX power supply, all wire ties must be unplugged and the power supply must be removed from the chassis for repair.

[0004] The ATX power supply used in the prior art has at least the following disadvantages: (1) The modular design is not only large in size, but also requires a large space in the computer case to facilitate the installation, removal and plugging of the power module. This not only increases the size of the case, but also increases the weight of the whole machine and the hardware cost. (2) Installation and removal are inconvenient. In addition to the need to install and remove screws in the case, it is also necessary to plug and unplug the corresponding wire ties, which makes maintenance quite inconvenient. (3) It is equipped with a fan, which increases the noise in the case. (4) The working status cannot be directly obtained and can only be obtained with the help of external equipment. (5) It is only applicable to ground equipment, generally has weak anti-interference ability, and its performance cannot meet the application requirements of more complex industrial occasions. Summary of the invention

[0005] The invention provides a power supply module which uses a CPCI power supply plug-in to replace an ATX power supply, so as to solve the problems existing in the prior art.

[0006] The present invention adopts the following technical solutions:

[0007] A power supply module, comprising a CPCI power supply plug-in and a +5VSB power supply module, is a power supply module that uses a CPCI power supply to replace an ATX power supply;

[0008] The +5VSB power module and the CPCI power plug-in are both connected to an external power source, and the +5VSB power module is used to convert the external power source into a +5V power source and output it.

[0009] The utility model also comprises a control circuit, wherein the control circuit is connected between the CPCI power supply plug-in and the external device.

[0010] The control circuit includes an output circuit for outputting an EN# signal and an output circuit for outputting an INH# signal.

[0011] The EN# signal output circuit includes a first resistor R1, one end of which is grounded. The INH# signal output circuit includes a MOS transistor U1, a gate of which is used as a PS-ON signal input, a drain of which is connected to a power supply through a second resistor R2, and a source of which is grounded.

[0012] The external power supply is AC220V.

[0013] The CPCI power plug-in is used to convert AC220V power into +3.3V, +5V, ±12V power and output it to external devices.

[0014] The +5VSB power supply module and control circuit are integrated circuit modules or separate modules.

[0015] The +5VSB power supply module includes an overcurrent protection circuit, a filter circuit, and an AC-DC power supply module connected in sequence. The filter circuit includes a common-mode inductor, and the AC-DC power supply module outputs a +5VSB power supply.

[0016] Beneficial effects of the present invention:

[0017] (1) The CPCI standard power plug-in is used, which is small in size and can greatly save equipment space. It overcomes the defects of the existing technology that the size of common ATX power supplies is generally large and sufficient installation space and wire tie layout space must be reserved in the chassis to facilitate the disassembly and assembly of the power module;

[0018] (2) The CPCI power plug-in is a hot-swappable design, which not only eliminates the need for fixing screws, but also does not require wire ties for signal output, which is transmitted directly through the backplane. When it needs to be repaired or replaced, you only need to pull the plug-in out of the chassis, which is very convenient for disassembly and assembly. The existing ATX power supply is installed with wire ties, which is inconvenient to disassemble.

[0019] (3) The CPCI power supply plug-in is equipped with a heat sink, which can be used to dissipate heat using the whole machine fan inside the chassis or the chassis shell; since no additional fan is added, the noise will be greatly reduced compared to the ATX power supply module;

[0020] (4) The CPCI power plug-in has its own power indicator light and fault indicator light. The working status of the power supply can be directly seen through the indicator light on the front panel, without the need to design an indicator light circuit and status analysis circuit separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the present invention.

[0022] Figure 2 This is a structural diagram of the +5VSB power supply module in an embodiment of the present invention.

[0023] Figure 3 4 is a circuit diagram of a control circuit in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The present invention provides a power supply module, which can use a CPCI power supply plug-in to replace the ATX power supply used in the prior art for the case and other occasions, so that the power supply module has the functions of the existing ATX power supply and the advantages of the existing CPCI power supply.

[0026] The CPCI power plug-in is a standard power plug-in designed according to the CPCI specification. It can convert the external power supply into DC +3.3V, +5V, and ±12V power under the action of the EN# signal and the INH# signal. The CPCI specification is mainly used in the industrial and embedded fields. It uses industrial machinery assembly standards and has high-performance connection technology. It can provide an optimized system for different applications. The CPCI specification specifies the appearance structure, connector type, and pin definition of the CPCI plug-in, unifying the design standards. An important feature of CPCI is system modularity, and each plug-in supports hot-swap, which facilitates the transplantation and replacement of the plug-in and can be directly used in other designs.

[0027] In one or more optional embodiments, the CPCI power plug-in may be a 3U (8HP) CPCI standard power plug-in manufactured by ADLINK Technology Co., Ltd., model number cPS-H325 / AC.

[0028] When used, the existing ATX power supply has the function of simultaneously outputting a +5VSB power supply as a standby power supply, but the existing CPCI power plug-in does not have this signal output. In order to make the power module of the present invention have this function, it is necessary to add a +5VSB power supply design outside the CPCI power plug-in.

[0029] See Figure 1 As shown, the power module of the present invention includes three parts: CPCI power plug-in, +5VSB power module and control circuit. The +5VSB power module and control circuit part can be an integrated circuit module or a separate module plug-in. The +5VSB power module is used to output the +5VSB standby power to provide it to external devices such as the control circuit, so that the control circuit can receive external instructions in the system sleep state and wake up the CPCI power output.

[0030] Both the +5VSB power module and the CPCI power plug-in are connected to an external power supply. The +5VSB power module and the CPCI power plug-in can be two separately arranged modules to avoid major changes to the existing CPCI power plug-in, or they can be arranged as one module. The external power supply can select an AC220V power supply. The CPCI power plug-in converts the AC220V power supply into +3.3V, +5V, ±12V power supplies and provides them to external devices as working power supplies. When the present invention is applied to a chassis, the external devices can be various plug-in boards in the chassis. The +5VSB power module includes an AC-DC power module. After the AC-DC power module converts 220V into +5VSB power supplies, it supplies them to external devices as standby power supplies.

[0031] like Figure 2 As shown, the +5VSB power supply module also includes an overcurrent protection circuit and a filtering circuit. The overcurrent protection circuit and the filtering circuit are selected from circuits or modules that meet the requirements in existing designs. For example, a series fuse can be used as an overcurrent protection circuit, and an LC circuit or a parallel varistor can be used as a filtering circuit; the AC 220V to DC 5V module can be any AC-DC module or chip that meets the performance requirements, such as Guangzhou Jinshengyang's LHE10-20B05 module.

[0032] The AC-DC power module converts the AC220V power supply into a +5V power supply and provides it to the control circuit and external devices. The control circuit can receive command signals from external devices in the system sleep state and wake up the CPCI power output.

[0033] The existing ATX power supply will output DC +5VSB standby power after connecting to AC 220V power supply, and then it can detect the power switch signal in real time and switch the power supply. When the power switch signal "PS-ON" is valid, the ATX power supply will output DC +3.3V, +5V, ±12V power; when the power switch signal "PS-ON" becomes invalid, the ATX power supply will no longer output DC +3.3V, +5V, ±12V power. The power switch signal "PS-ON" is valid at low level.

[0034] Compared with the ATX power supply, the CPCI power supply does not have the function of continuously outputting +5V standby power. Therefore, the present invention provides 5V standby power by adding a +5VSB power module, as described above; and the power output control signal is different. If the CPCI power supply replaces the ATX power supply, in addition to designing a +5V standby power circuit, a control circuit needs to be designed to achieve the function of controlling the output on and off of the CPCI power supply using the "PS-ON" signal of the ATX power supply.

[0035] The existing CPCI power plug-in controls the output on and off through the combination of the two signals EN# and INH#. The combination logic relationship is shown in the following table:

[0036]

[0037] It can be seen from the above table that by keeping the EN# signal of the CPCI power plug-in at a low level and controlling the high and low levels of the INH# signal of the CPCI power plug-in by the "PS-ON" signal of the ATX power supply, the output of the CPCI power plug-in can be turned on and off, that is, the output state of the CPCI power plug-in can be controlled by the "PS-ON" signal.

[0038] Since the "PS-ON" signal of the ATX power supply is effective at low level, the design can be as follows Figure 3 The control circuit shown is, of course, also other equivalent circuits.

[0039] like Figure 3 In the circuit shown, the circuit outputting EN# in the control circuit includes a first resistor R1, one end of the first resistor R1 is grounded, and the other end outputs the EN# signal. The circuit outputting the INH# signal in the control circuit includes a MOS tube U1, the gate of the MOS tube U1 is used as the PS-ON signal input, the drain of the MOS tube U1 is connected to the power supply through the second resistor R2, and the source of the MOS tube U1 is grounded.

[0040] Depend on Figure 3It can be seen that the circuit that outputs the EN# signal is grounded, so the EN# signal is always at a low level; the state of the INH# signal changes under the control of PS-ON. When the "PS-ON" signal is invalid, that is, at a high level, the MOS tube U1 is turned on, and the INH# signal is pulled down to a low level. By comparing Table 1, it can be seen that the CPCI power supply has no output at this time; when the "PS-ON" signal is valid, that is, at a low level, the MOS tube U1 is not turned on, and the INH# signal is pulled up to a high level. At this time, the CPCI power supply has output.

[0041] The above control circuit realizes the control of the power output by the PS-ON signal, and combines with the CPCI power plug-in and +5VSB power module to realize the same function as the ATX power supply.

[0042] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0043] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the field within the scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A power module, characterized in that: It includes CPCI power plug-in and +5VSB power module, and is a power module that uses CPCI power to replace ATX power; The +5VSB power module and the CPCI power plug-in are both connected to an external power source, and the +5VSB power module is used to convert the external power source into a +5V power source and output it; Also included is a control circuit, wherein the control circuit is connected between the CPCI power supply plug-in and the external device; The control circuit includes an output circuit that outputs an EN# signal and an output circuit that outputs an INH# signal; The EN# signal output circuit comprises a first resistor (R1), one end of which is grounded; the INH# signal output circuit comprises a MOS tube (U1), a gate of which is used as a PS-ON signal input, a drain of which is connected to a power supply via a second resistor (R2), and a source of which is grounded; The circuit that outputs the EN# signal is grounded, and the EN# signal is always at a low level; the state of the INH# signal changes under the control of PS-ON; when the "PS-ON" signal is invalid, that is, at a high level, the MOS tube U1 is turned on, and the INH# signal is pulled down to a low level. At this time, the CPCI power supply has no output; when the "PS-ON" signal is valid, that is, at a low level, the MOS tube U1 is not turned on, and the INH# signal is pulled up to a high level. At this time, the CPCI power supply has an output.

2. A power module according to claim 1, characterized in that: The external power supply is AC220V.

3. A power module according to claim 1, characterized in that: The CPCI power plug-in is used to convert AC220V power into +3.3V, +5V, ±12V power and output it to external devices.

4. A power module according to claim 1, characterized in that: The +5VSB power supply module and control circuit are integrated circuit modules or separate modules.

5. A power module according to any one of claims 1 or 4, characterized in that: The +5VSB power supply module includes an overcurrent protection circuit, a filter circuit, and an AC-DC power supply module connected in sequence. The filter circuit includes a common-mode inductor, and the AC-DC power supply module outputs a +5VSB power supply.

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