JPH1075523A - Power supply equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain generation of malfuction and trouble of an electronic apparatus, and improve reliability and safety, by connecting a breaking circuit with each auxiliary apparatus, detecting a supply current to each auxiliary apparatus, with each current detection circuit, and controlling each of the breaking circuits, with a controller, on the basis of the respective detected results. SOLUTION: The respective breaking circuits 15, 16 are connected with the respective current detection circuits 13, 14 and the respective output terminals of an I/O resistor 17, and connected with the respective function extension option machines 19, 20, via the respective connectors 21, 22. The respective circuit breaking circuits 15, 16 are opened and closed by a signal from the I/O resistor 17, and the power supply from a power source circuit 12 to each of the function option machines 19, 20 is interrupted or continued. By a controller 18 constituted of a CPU of a computer, the switching control of each of the breaking circuits 15, 16 is performed for each function extension option. Thereby it can be set that power is predominantly supplied to, e.g, an external storage device which is necessary for starting an electronic apparatus, even if circuit change is generated in other auxiliary apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for supplying power to a plurality of function expansion optional devices connected to a computer, for example.

[0002]

2. Description of the Related Art In recent years, with the spread of personal computers, option expansion machines other than the design maker of the computer main body have been frequently used by users.

Conventionally, as a power supply device for supplying power to this type of function expansion optional device, a device including a power fluctuation detection circuit and a cutoff circuit has been adopted, and is configured as shown in FIG. I have.

Referring to FIG. 1, a power supply device denoted by reference numeral 1 includes a power supply circuit 2, a power supply fluctuation detection circuit 3, and a cutoff circuit 4, and is used for an electronic device such as a computer. (Not shown).

[0005] The power supply fluctuation detecting circuit 3 detects fluctuations in the voltage or current supplied from the power supply circuit 2. The shut-off circuit 4 is used when the voltage or current fluctuates.
Cut off the power supply from. Optional function expansion devices 7 and 8 are connected to the cutoff circuit 4 via connectors 5 and 6.

In the power supply device configured as described above, either one of the function expansion optional devices 7 and 8 (for example, the function expansion optional device 7 or 8)
When a circuit fluctuation such as a voltage drop or an overcurrent occurs in the power supply, the cutoff circuit 4 is activated by the detection of the power supply fluctuation detection circuit 3, and the power supply from the power supply circuit 2 to both the function expansion optional machines 7 and 8 is cut off. You.

[0007]

By the way, in the conventional power supply device, a plurality of function expansion optional devices 7 and 8 are connected to a single shut-off circuit 4, so that one function expansion optional device ( For example, even when a circuit change occurs in the function expansion option 7 or 8), the power supply to all the function expansion options 7 and 8 is cut off.

As a result, other normal function expansion option machines (for example, the function expansion option machine 8 or 7) cannot be operated, and a malfunction or failure occurs in the electronic equipment (not shown). There is a problem that the reliability and safety of the device decrease.

The present invention has been made in view of such circumstances, and provides a power supply device capable of suppressing the occurrence of malfunctions and failures in electronic devices, thereby improving the reliability and safety of the electronic devices. Aim.

[0010]

According to a first aspect of the present invention, there is provided a power supply apparatus, comprising: a power supply circuit connected to an electronic device and having a power supply circuit capable of connecting a plurality of auxiliary machines. In the device, a disconnection circuit is connected for each accessory,
A current detection circuit is connected to each of the interruption circuits and the power supply circuit, and each of the current detection circuits and each of the interruption circuits is connected to a controller. Therefore,
A current supplied to each auxiliary device is detected by each current detection circuit, and each cutoff circuit is controlled by a controller based on each detection result.

According to a second aspect of the present invention, in the power supply device according to the first aspect, the current detection circuit and the cutoff circuit include:
It is configured to be connected to a controller via an I / O register.

The invention described in claim 3 is the first or second invention.
In the power supply device described above, the electronic device is a computer.

According to a fourth aspect of the present invention, in the power supply device of the first, second or third aspect, one of the auxiliary devices is an external storage device.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a power supply device according to an embodiment of the present invention. In the figure, a power supply device denoted by reference numeral 11 is a power supply circuit 12.
, Current detection circuits 13 and 14, interruption circuits 15, 16 and I /
An O register 17 and a controller 18 are provided.

The power supply circuit 12 is connected to a personal computer (not shown).

Each of the current detection circuits 13 and 14 includes a power supply circuit 1
2 and to each input terminal of the I / O register 17. As a result, the current supplied from the power supply circuit 12 is detected for each of the function expansion optional devices 19 and 20 as auxiliary devices, and this detection signal is output to the I / O register 17.
Sent to

Each of the cutoff circuits 15 and 16 is connected to each of the current detection circuits 13 and 14 and each of the output terminals of the I / O register 17, and is connected to each of the function expansion option machines 19 and 20 via each of the connectors 21 and 22. It is connected. Each of these shut-off circuits 15 and 16 is opened / closed by an input signal from the I / O register 17 to open / close the function-enhancing optional machine 1.
The power supply from the power supply circuit 12 to the power supply circuits 9 and 20 is supplied and cut off.

The controller 18 comprises a CPU (Central Processing Unit) of a personal computer (not shown), and is connected to the I / O register 17. Thereby, based on the input signal from the I / O register 17, the input signal is compared with a preset single or plural current values, and each of the cutoff circuits 15, 16 is softened via the I / O register 17. Wear controlled. Therefore, when the power supply current supplied to one of the function expansion optional devices 19 and 20 exceeds the rated value, the function expansion option device 20 is protected to protect the function of the other function expansion option device 20. The power supply to the machine 19 is cut off. That is, opening / closing control of each of the shutoff circuits 15 and 16 by software control of the controller 18 is performed for each of the function expansion optional devices 19 and 20.

In the power supply device configured as described above, each of the function expansion optional devices 1
The supply currents to 9 and 20 are detected by the current detection circuits 13 and 14, and the cutoff circuits 15 and 16 are controlled based on the detection results.

For example, when a circuit fluctuation such as a voltage drop or an overcurrent occurs in the function expansion optional device 19, the cutoff circuit 15 is opened, and the power supply from the power supply circuit 12 to the function expansion optional device 19 is cut off. At this time,
Power is supplied from the power supply circuit 12 to each of the function expansion optional devices 20.

On the other hand, when a circuit fluctuation such as a voltage drop or an overcurrent occurs in the optional function expansion device 20, the cutoff circuit 16 is opened, and the power supply from the power supply circuit 12 to the optional function expansion device 20 is cut off. At this time, power is supplied from the power supply circuit 12 to each of the function expansion optional devices 19.

Here, when the power consumption of the entire function expansion option machine exceeds the rated value of the apparatus, priority is given to each function expansion option machine by software control, and the function expansion option machine within the rated value is given. Only the current can be supplied. For example, if one of the auxiliary devices required for starting the electronic device is an external storage device, and if it is set so that power is supplied to this external storage device preferentially, a circuit change occurs in other auxiliary devices. Since the external storage device can also be protected, the personal computer can be started at a minimum.

In the present embodiment, an example in which a personal computer is connected to the power supply circuit has been described. However, the present invention is not limited to this. Even when other electronic devices are connected, the same effects as in the embodiment can be obtained. Play.

The type and number of auxiliary machines in the present invention are, of course, not limited to the above-described embodiment.

[0025]

As described above, according to the present invention, a breaking circuit is connected to each auxiliary machine, and a current detecting circuit is connected to each of the breaking circuits and the power supply circuit. Since the cutoff circuit is connected to the controller, the current supplied to each auxiliary device is detected by each current detection circuit, and each cutoff circuit is controlled by the controller based on each detection result.

Therefore, when a circuit change occurs in one auxiliary machine, the power supply to only this auxiliary machine can be cut off, and the other normal auxiliary machines can function. The reliability and safety of the electronic device can be improved by suppressing the occurrence of a failure.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a power supply device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a conventional power supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Power supply device 12 Power supply circuit 13, 14 Current detection circuit 15, 16 Breaker circuit 17 I / O register 18 Controller

Claims (4)

[Claims] 1. A power supply device connected to an electronic device and having a power supply circuit capable of connecting a plurality of auxiliary machines, wherein a cutoff circuit is connected to each of the auxiliary machines, and each of the cutoff circuits and the power supply circuit are connected. A current detection circuit, and each of the current detection circuit and each of the cutoff circuits is connected to a controller. 2. The power supply device according to claim 1, wherein the current detection circuit and the cutoff circuit are connected to the controller via an I / O register. 3. The power supply according to claim 1, wherein the electronic device is a computer. 4. The power supply according to claim 1, wherein one of the auxiliary devices is an external storage device.