CN204205936U - Based on the single supply supply unit of ComExpress module - Google Patents

Abstract

The utility model discloses a single power supply device based on a ComExpress module, which comprises a ComExpress module, a 12V output DC-DC circuit, a 5V output DC-DC circuit, a 3.3V output DC-DC circuit, a 12V output switch control circuit, a 5V output Switch control circuit and 3.3V output switch control circuit, ComExpress module has PS_ON# signal interface, +12V power supply interface and module standby interface, PS_ON# signal is used as 12V output switch control circuit, 5V output switch control circuit and 3.3V output switch respectively Control input signal for the control circuit. The utility model realizes the same function as the traditional ATX power supply in the case of only a single DC power supply below 38V by adding a DC-DC circuit and each DC power supply output switch control circuit, and through the PS_ON# signal control of the ComExpress module. Normal application requirements for motherboards using ComExpress modules.

Description

Single-supply power supply unit based on ComExpress module

technical field

The utility model relates to a power supply device, in particular to a single power supply device based on a ComExpress module.

Background technique

The full name of COM Express is PICMG COM.0COM Express Module Base Specification, which is a computer module standard defined by the International Industrial Electrical Association (PICMG) and jointly formulated by several major embedded industrial computer manufacturers. ATX interface is a power interface of a PC, which is generally realized by switching power supply from 220 volts to 12 volts, 5 volts, 3.3 volts, etc. The main feature is that it has 5 volts STANDBY, which is the backup power supply, and PS_ON, which is the power switch control signal; ATX The shape of the power supply is a metal box with a large volume, which is independent of the main board of the PC, and its input power is AC 220 volts.

ComExpress modules are more commonly used in industrial environments, such as in many power and telecommunications application scenarios, as well as in vehicles, and used in an overall electrical cabinet. It can only provide a low-voltage DC power input such as 24V or 36V. Traditional The ATX power supply is no longer suitable for this scenario, and the traditional ATX motherboard power input requirements cannot meet the modified scenario. Because the lack of external power supply types has a direct impact on its reliability and cost, this requires the adapted motherboard to have corresponding power management capabilities similar to ATX.

In this case, the existing ATX switching power supply cannot adapt to the application. This situation is also different from devices that use a single power input of less than 38 volts, such as notebook computers, which directly utilize X86 technology, unlike the ComExpress module interface.

Therefore, for the main board using the ComExpress module, it cannot be applied to the situation that the external single power input is less than 38 volts, which brings inconvenience to the use of equipment using this main board, such as a PC.

Utility model content

The purpose of this utility model is just to provide a kind of single power supply device based on ComExpress module that can be applicable to less than 38V single power supply input in order to solve the above problems.

The utility model realizes above-mentioned purpose through following technical scheme:

A kind of single power supply device based on ComExpress module, comprise described ComExpress module installed on the main board, described ComExpress module is provided with PS_ON# signal interface, +12V power supply interface and module standby interface, described single power supply device also includes 12V output DC-DC circuit, 5V output DC-DC circuit, 3.3V output DC-DC circuit, 12V output switch control circuit, 5V output switch control circuit and 3.3V output switch control circuit, the 12V output DC-DC circuit The input terminal inputs a DC power supply less than 38V, and the output terminal of the 12V output DC-DC circuit is respectively connected to the input terminal of the 12V output switch control circuit, the input terminal of the 5V output DC-DC circuit and the 3.3V output The input terminal of the DC-DC circuit is connected, the output terminal of the 12V output switch control circuit is connected with the +12V power interface of the ComExpress module, and the output terminal of the 5V output DC-DC circuit is connected with the module of the ComExpress module respectively The standby interface is connected to the input end of the 5V output switch control circuit, the output end of the 3.3V output DC-DC circuit is connected to the input end of the 3.3V output switch control circuit, and the output of the 5V output switch control circuit terminal output +5V power supply, the output terminal output +3.3V power supply of the 3.3V output switch control circuit, the PS_ON# signal interface of the ComExpress module is respectively connected with the control input terminal of the 12V output switch control circuit, the 5V output The control input end of the switch control circuit is connected to the control input end of the 3.3V output switch control circuit.

Further, the main board is also provided with a 3.3Vstandby holding circuit (i.e. a 3.3V standby power supply holding circuit), the power input end of the 3.3Vstandby holding circuit is connected to the output end of the 3.3V output DC-DC circuit, and the 3. The WAKE signal output end of the 3Vstandby holding circuit is connected with the WAKE signal input end of the ComExpress module. The 3.3Vstandby holding circuit and its WAKE signal output terminal, and the WAKE signal input terminal of the ComExpress module are all conventional applications on the existing motherboard. The innovation here is to connect the output terminal of the 3.3V output DC-DC circuit to the power supply of the 3.3Vstandby holding circuit. The source input terminal is not controlled by the PS_ON# signal of the ComExpress module, so it can always maintain its power input voltage.

The beneficial effects of the utility model are:

The utility model realizes the same function as the traditional ATX power supply under the condition of single DC power supply input below 38V by adding DC-DC circuit and each DC power supply output switch control circuit, and through the PS_ON# signal control of the ComExpress module, so as to meet the When there is only a single external power input of less than 38 volts, the normal application requirements of the motherboard using the ComExpress module. The utility model can realize all relevant circuits on one main board, simplifies the design of the power supply system, reduces the probability of system failure, and has remarkable practical value.

Description of drawings

Fig. 1 is one of circuit block diagrams of the single power supply device based on ComExpress module described in the utility model;

Fig. 2 is the second circuit block diagram of the single power supply device based on the ComExpress module of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, the single power supply device based on the ComExpress module includes a ComExpress module and a 3.3Vstandby holding circuit installed on the main board. The ComExpress module is provided with a PS_ON# signal interface, a +12V power supply interface and a module standby interface. The single The power supply device also includes 12V output DC-DC circuit, 5V output DC-DC circuit, 3.3V output DC-DC circuit, 12V output switch control circuit, 5V output switch control circuit and 3.3V output switch control circuit, 12V output DC-DC circuit, The input terminal of the DC circuit inputs a DC power supply less than 38V. Generally, the power input is realized by connecting the ATX interface socket with a single power supply input. The output terminal of the 12V output DC-DC circuit is respectively connected to the input terminal of the 12V output switch control circuit and the 5V output terminal. The input end of the DC-DC circuit is connected to the input end of the 3.3V output DC-DC circuit, the output end of the 12V output switch control circuit is connected to the +12V power interface of the ComExpress module, and the output end of the 5V output DC-DC circuit is respectively connected to the ComExpress The module standby interface of the module is connected to the input end of the 5V output switch control circuit, the output end of the 3.3V output DC-DC circuit is respectively connected to the input end of the 3.3V output switch control circuit and the power input end of the 3.3Vstandby holding circuit, and the 5V output The output terminal of the switch control circuit outputs +5V power supply, and the output terminal of the 3.3V output switch control circuit outputs +3.3V power supply. The PS_ON# signal interface of the ComExpress module is respectively connected to the control input terminal of the 12V output switch control circuit and the 5V output switch control circuit The control input terminal of the control circuit is connected with the control input terminal of the 3.3V output switch control circuit, and the WAKE signal output terminal of the 3.3Vstandby holding circuit is connected with the WAKE signal input terminal of the ComExpress module.

As shown in Figure 1, the operating principle of the single power supply device based on the ComExpress module described in the utility model is as follows:

The input DC power supply below 38V passes through the 12V output DC-DC circuit and outputs +12VSB power supply (i.e. standby power supply) and is divided into three circuits. The first +12VSB power supply passes through the 12V output switch control circuit and then outputs to the + of the ComExpress module. 12V power supply interface; the second +12VSB power supply is transformed by a 5V output DC-DC circuit to output +5VSB power supply, which is output to other circuits on the main board as input power after being controlled by the 5V output switch circuit; the third +12VSB power supply passes through The 3.3V output DC-DC circuit transforms and outputs +3.3VSB power supply, which is output to other circuits on the motherboard as input power after being controlled by the 3.3V output switch circuit. The on and off states of the 12V output switch control circuit, 5V output switch control circuit and 3.3V output switch control circuit are all controlled by the PS_ON# signal of the ComExpress module. There is power input, and other circuits are closed. In this case, it can be woken up through the outside (that is, the 3.3Vstandby circuit generates a WAKE signal, which is a detection signal and supports wake-up function). The system is linked with the PS_ON# signal to turn on other power supplies to make the system work , so as to realize the power management process similar to the ATX power interface.

As shown in Figure 2, the following takes the +24V single power supply as an example to illustrate:

The input 24V DC power supply passes through the 24V to 12V DC-DC circuit and outputs +12VSB power supply and is divided into three circuits. The first +12VSB power supply passes through the 12V output switch control circuit and then outputs to the +12V power interface of the ComExpress module; the second The first +12VSB power supply is transformed by a 12V to 5V DC-DC circuit to output +5VSB power supply, which is output to other circuits on the main board as input power after being controlled by the 5V output switch circuit; the third +12VSB power supply is converted to 3.3V DC by 12V - After the DC circuit is transformed, it outputs +3.3VSB power supply, which is output to other circuits on the main board as input power after being controlled by the 3.3V output switch. The on and off states of the 12V output switch control circuit, 5V output switch control circuit and 3.3V output switch control circuit are all controlled by the PS_ON# signal of the ComExpress module. With power input, other circuits are closed.

Compared with the direct use of ATX power supply, the power supply device proposed by the utility model has optimized design, saves cost and enhances reliability. If the ATX power supply design is copied without optimization and application-specific tailoring, it will be a waste of cost and a challenge to reliability. When the power supply fails, it is necessary to eliminate which power supply in the power supply There are issues and maintenance time increases.

The above-described embodiments are only preferred embodiments of the present utility model, and are not limitations to the technical solutions of the present utility model. As long as the technical solutions that can be realized on the basis of the above-mentioned embodiments without creative work, all should be regarded as falling into the scope of this invention. within the protection scope of utility model patents.

Claims (2)

1. a single power supply device based on ComExpress module, comprising the described ComExpress module installed on the main board, described ComExpress module is provided with PS_ON# signal interface, +12V power supply interface and module standby interface, it is characterized in that: described The single power supply device also includes a 12V output DC-DC circuit, a 5V output DC-DC circuit, a 3.3V output DC-DC circuit, a 12V output switch control circuit, a 5V output switch control circuit and a 3.3V output switch control circuit. The 12V The input end of the output DC-DC circuit is input with a DC power supply less than 38V, and the output end of the 12V output DC-DC circuit is respectively connected to the input end of the 12V output switch control circuit and the input end of the 5V output DC-DC circuit Connect with the input end of described 3.3V output DC-DC circuit, the output end of described 12V output switch control circuit is connected with the +12V power interface of described ComExpress module, the output end of described 5V output DC-DC circuit is connected with respectively The module standby interface of the ComExpress module is connected to the input end of the 5V output switch control circuit, the output end of the 3.3V output DC-DC circuit is connected to the input end of the 3.3V output switch control circuit, and the 5V The output terminal of the output switch control circuit outputs +5V power supply, the output terminal of the 3.3V output switch control circuit outputs +3.3V power supply, and the PS_ON# signal interface of the ComExpress module is connected to the control input of the 12V output switch control circuit respectively. Terminal, the control input terminal of the 5V output switch control circuit and the control input terminal of the 3.3V output switch control circuit are connected. 2. the single power supply device based on ComExpress module according to claim 1, is characterized in that: described main board is also provided with 3.3Vstandby keeps circuit, and the power supply input end of described 3.3Vstandby keeps circuit and described 3.3V output The output end of the DC-DC circuit is connected, and the WAKE signal output end of the 3.3Vstandby holding circuit is connected with the WAKE signal input end of the ComExpress module.