JP3686847B2 - Power supply system, power-on sequence control circuit and method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a power supply system, a power-on sequence control circuit, and a method thereof, and more particularly to first and second power supply circuits to which an input voltage is commonly applied, and at least the second power supply circuit activates its own circuit. The present invention relates to a power supply system having a control terminal for power supply, a power-on sequence control circuit, and a method thereof.
[0002]
[Prior art]
FIG. 2 is a diagram showing a configuration of a conventional power supply system. In FIG. 2, the conventional power supply system includes a device 10 that performs data communication and the like, and a station power supply (for example, −48 V) 2 for supplying power to the device 10. The device 10 includes a common switch 3 and packages 11-1 to 11-4 on which onboard power supplies (OBP) 12-1 to 12-4 are mounted.
[0003]
The common switch 3 is installed in the apparatus 10 and supplies / shuts off power from the station power supply 2 by turning on / off the switch. The package 11 -N (N is an integer of 1 to 4) is a package on which the OBP 12 -N is mounted, and is mounted in the device 10. Each OBP 12-1 to 12-4 can drive an integrated circuit (not shown) from the output terminal (OUT terminal) by inputting, for example, −48 V power from the office power supply 2 to the input terminal (IN terminal). DC / DC converter that can output a large power supply (+ 5V, -5.2V, + 3.3V, etc.).
[0004]
In the conventional power supply system having such a configuration, when the common switch 3 is turned on, for example, -48V power is supplied from the station power supply 2 to the device 10, and a plurality of packages 11-1 mounted in the device 10 are supplied. Power is supplied to the OBPs 12-1 to 12-4 mounted on ˜11-4. When power is supplied to the OBPs 12-1 to 12-4, power that can drive an unillustrated integrated circuit is output from the OBPs 12-1 to 12-4, and the apparatus 10 is activated.
[0005]
However, in the conventional power supply system having such a configuration, when the common switch 3 is turned on, power is supplied to the plurality of packages 11-1 to 11-4 all at once. A large inrush current occurs at 12-4. That is, when the inrush current at the time of power-on increases, the OBPs 12-1 to 12-4 are damaged or cause malfunction.
[0006]
In addition, since the power is supplied to the plurality of packages 11-1 to 11-4 almost simultaneously by turning on the common switch 3, the startup of each of the packages 11-1 to 11-4 is performed by the OBPs 12-1 to 12-12. -4 variation and the load in the package. That is, the startup operation of the packages 11-1 to 11-4 becomes unstable, which affects the startup of the device 10.
[0007]
Next, an excessive inrush current prevention circuit described in Japanese Patent Laid-Open No. 60-66627 (first publication) for the purpose of preventing an excessive inrush current will be described. FIG. 3 is a diagram showing the configuration of the excessive inrush current prevention circuit described in the first publication.
[0008]
In FIG. 3, 21 is an AC input, 22 is a switch, 23, 24 and 25 are power supply circuits, 26 and 27 are relay circuits, and 28, 29 and 30 are DC outputs. Here, when the switch 22 is turned on, the AC input 21 is applied to the power supply circuit 23 and the DC output 28 is output.
[0009]
The relay of the relay circuit 26 is operated by the output and the contact switch is closed, so that the AC input 21 is applied to the power supply circuit 24 and the DC output 29 is output. The relay of the relay circuit 27 is operated by the output, the contact switch is closed, the AC input 21 is applied to the power circuit 25, and the DC output 30 is output. As described above, by applying the AC input 21 to the power supply circuits 23, 24, and 25 with a time delay, an increase in inrush current is suppressed.
[0010]
[Problems to be solved by the invention]
In the excessive inrush current prevention circuit described in the first publication shown in FIG. 3, as described above, the relay circuits 26 and 27 are provided in the input stage of the AC input 21 of the power supply circuits 24 and 25, and the power supply circuit of the preceding stage is provided. By operating the relay circuits 26 and 27 by the output, the application of the AC input 21 to the power supply circuits 24 and 25 is controlled. However, if the relay circuits 26 and 27 are used in order to suppress the increase of the inrush current, there is a problem that the power consumption increases due to the relay circuits 26 and 27.
[0011]
Further, in the excessive inrush current prevention circuit described in the first publication, the relay circuits 26 and 27 are used, and these relay circuits 26 and 27 are inserted in series with the AC input 21 line. In addition, there is a problem that sparks are generated at the contact switches of each relay.
[0012]
An object of the present invention is to provide a power supply system that can reduce an inrush current at the time of power-on without using a relay circuit at a power input stage of the power circuit, a power-on sequence control circuit, and a method thereof. .
[0013]
[Means for Solving the Problems]
A power supply system according to the present invention includes first and second power supply circuits to which an input voltage is applied in common, and at least the second power supply circuit is a power supply system having a control terminal for controlling its own circuit to an active state. Based on the output of the first power supply circuit that is output in response to the application of the input voltage, the second power supply circuit is activated with respect to the control terminal of the second power supply circuit. look including the power-on sequence control circuit having a control means for outputting an active control signal Te, the control means further on the basis of the output of said second power supply circuit, to said control terminal of said second power supply circuit On the other hand, the activation control signal is output .
[0015]
Furthermore, in the power supply system, the first and second power supply circuits are on-board power supplies, and the control terminal is a remote control terminal.
[0016]
A power-on sequence control circuit according to the present invention includes first and second power supply circuits to which an input voltage is applied in common, and at least the second power supply circuit has a control terminal for controlling its own circuit to an active state. A power-on sequence control circuit in the system, wherein the second power circuit is activated based on an output of the first power circuit output in response to application of the input voltage. look including a control means for outputting an active control signal to the control terminal of the power supply circuit of the control means is further based on an output of said second power supply circuit, the control of the second power supply circuit The activation control signal is output to a terminal .
[0018]
Further, in the power-on sequence control circuit, the first and second power circuits are on-board power supplies, and the control terminal is a remote control terminal.
[0019]
A power supply system according to the present invention includes first to nth (n is an integer of 3 or more) power supply circuits to which an input voltage is commonly applied, and each of the second to nth power supply circuits activates its own circuit. A power supply system having a control terminal for controlling the state, and based on the output of the first power supply circuit output in response to application of the input voltage, to the control terminal of the second power supply circuit The activation control signal is output to the control terminal of the (i + 1) th power supply circuit based on the output of the i-th (i is an integer from 2 to n-1) power supply circuit. unrealized, said control means controlling means for outputting further based on an output of said second power supply circuit outputs the active control signal to the control terminal of the second power supply circuit, wherein Based on the output of the (i + 1) th power supply circuit, the (i + 1) th power supply circuit. And outputs an activation control signal to the control terminal of the circuit.
[0021]
The power-on control method according to the present invention includes first to n-th (n is an integer greater than or equal to 3) power circuits to which an input voltage is commonly applied, and each of the second to n-th power circuits is its own circuit. A power-on control method in a power supply system having a control terminal for controlling the active state to the active state, the step of applying the input voltage to the first power supply circuit, and the output of the input voltage in response to the application of the input voltage A step of outputting an activation control signal to the control terminal of the second power supply circuit based on the output of the first power supply circuit, and thereafter the i-th (i is an integer of 2 to n-1). based on the output of the power supply circuit, based on an output of the (i + 1) observed including a step of sequentially outputting active control signal to the control terminal of the power supply circuit of the second power supply circuit, the first An activation control signal is sent to the control terminal of the power supply circuit 2 A step of force, on the basis of the output of the power supply circuit of the (i + 1), characterized in that it further comprises a step of outputting an active control signal to the control terminal of the power supply circuit of the (i + 1) .
[0022]
The operation of the present invention is as follows. The control means outputs an activation control signal to the control terminal of the second power supply circuit based on the output of the first power supply circuit, whereby the second power supply circuit is activated. Thereby, the second power supply circuit activated in response to the activation control signal converts and outputs an input voltage common to the first power supply circuit. Further, since the control means outputs an activation control signal to the control terminal of the second power supply circuit based on the output of the second power supply circuit, the output of the first power supply circuit may be cut off due to a failure or the like. Even if it changes, the operation of the second power supply circuit can be maintained. Further, after the third power supply circuit, the activation control is easily performed based on the output of the power supply circuit in the previous stage, so that the power-on sequence control can be easily performed.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a power supply system according to an embodiment of the present invention, and parts equivalent to those in FIG. 2 are denoted by the same reference numerals. In FIG. 1, a power supply system according to an embodiment of the present invention includes a device 1 and a station power supply 2. The device 1 is a device that performs data communication and the like, and the station building power source 2 is a station building power source (for example, −48 V) for supplying power to the device 1.
[0024]
The device 1 includes a common switch 3 and packages 4-1 to 4-4. The common switch 1 is installed in the apparatus 1 and supplies / shuts off power from the station power supply 2 by turning on / off the switch. A package 4-N (N is an integer of 1 to 4) is a package on which an on-board power supply (OBP) 5-N is mounted. The package 4-N is mounted on the device 10, and the package 4-N is mounted Nth.
[0025]
The OBPs 5-1 to 5-4 can drive an integrated circuit (not shown) from the output terminal (OUT terminal) by inputting, for example, an input voltage from the station power supply 2 of −48 V to the input terminal (IN terminal). DC / DC converter that can output various power supplies (+ 5V, -5.2V, + 3.3V, etc.), and has a remote control terminal (RC terminal) for controlling its own OBP to an active state. The outputs of the OBPs 5-1 to 5-4 are supplied not only to the output confirmation circuits 6-1 to 6-4 but also to an integrated circuit (not shown).
[0026]
The output confirmation circuit 6-N mounted on the package 4-N is a circuit for confirming that a power source of + 5V, -5.2V, + 3.3V, etc. is output from the OUT terminal of the OBP5-N. When the output of N is confirmed, a confirmation notification signal 7-N is output.
[0027]
The control circuit 8-2 mounted on the package 4-2 responds to the confirmation notification signal 7-1 from the output confirmation circuit 6-1 mounted on the package 4-1 at the preceding stage in response to its own package 4-2. This circuit outputs an activation control signal 9-2 to the RC terminal of the OBP5-2. Further, the control circuit 8-2 responds to the confirmation notification signal 7-2 from the output confirmation circuit 6-2 mounted in its own package 4-2 to the RC terminal of the OBP 5-2 by the activation control signal 9-. 2 is output.
[0028]
Similarly, the control circuit 8-3 mounted on the package 4-3 receives the confirmation notification signal 7-2 from the output confirmation circuit 6-2 mounted on the preceding package 4-2 and the own package 4-3. This circuit outputs an activation control signal 9-3 to the RC terminal of the OBP 5-3 of its own package 4-3 in response to the confirmation notification signal 7-3 from the mounted output confirmation circuit 6-3.
[0029]
Similarly, the control circuit 8-4 mounted on the package 4-4 receives the confirmation notification signal 7-3 from the output confirmation circuit 6-3 mounted on the preceding package 4-3 and the own package 4-4. In response to the confirmation notification signal 7-4 from the mounted output confirmation circuit 6-4, the activation control signal 9-4 is output to the RC terminal of the OBP 5-4 of the package 4-4. In the present embodiment, the package 4-1 does not include a control circuit equivalent to the control circuits 8-2 to 8-4, and therefore the control circuit 8-1 does not exist.
[0030]
In this embodiment, the output confirmation circuits 6-1 to 6-4 and the control circuits 8-2 to 8-4 constitute a power-on sequence control circuit (excessive inrush current prevention circuit).
[0031]
Next, the operation of the power supply system according to the embodiment of the present invention will be described with reference to FIG. In FIG. 1, when the common switch 3 is turned on, a power of −48 V, for example, is supplied from the station power supply 2 to the device 1 and is mounted on a plurality of packages 4-1 to 4-4 mounted in the device 1. Power is supplied to the OBPs 5-1 to 5-4.
[0032]
However, at this time, the activation control signals 9-2 to 9-4 from the control circuits 8-2 to 8-4 are not input to the RC terminals of the respective OBPs 5-2 to 5-4. Since the OBPs 5-2 to 5-4 are controlled to be inactive, power supplies such as + 5V, -5.2V, and + 3.3V are not output from the OUT terminals of the respective OBPs 5-2 to 5-4.
[0033]
On the other hand, in the package 4-1 that does not use the control circuit, the OBP 5-1 is in an active state, and thus starts to operate from the package 4-1. First, when the OBP 5-1 of the package 4-1 operates, a power source of + 5V, -5.2V, + 3.3V, etc. is output from the OUT terminal of the OBP 5-1. As a result, the output confirmation circuit 6-1 operates and a confirmation notification signal 7-1 is sent out.
[0034]
The confirmation notification signal 7-1 is sent to the control circuit 8-2 of the package 4-2. The control circuit 8-2 outputs an activation control signal 9-2 to the RC terminal of the OBP 5-2 in response to the confirmation notification signal 7-1. Thereby, control is applied to the RC terminal of the OBP 5-2, and the OBP 5-2 is activated. Then, when a power source such as + 5V, -5.2V, + 3.3V, or the like is output from the OUT terminal of the activated OBP5-2, the output confirmation circuit 6-2 operates and a confirmation notification signal 7-2 is transmitted. Is done.
[0035]
The confirmation notification signal 7-2 is sent to the control circuit 8-2 of the own package 4-2 and the control circuit 8-3 of the subsequent package 4-3. Thus, not only the confirmation notification signal 7-1 from the previous output confirmation circuit 6-1 but also the confirmation notification signal 7 from the output confirmation circuit 6-2 of the own package 4-2 with respect to the control circuit 8-2. -2 is also entered when the confirmation notification signal 7-1 in the previous stage disappears due to the failure of the OBP 5-1 in the previous stage or the removal of the package 4-1, after the start-up is completed. This is to prevent the output of OBP5-2 from stopping.
[0036]
In response to the confirmation notification signal 7-2 from the output confirmation circuit 6-2, the package 4-3 performs the same operation as that of the package 4-2, and receives the confirmation notification signal 7-3 from the output confirmation circuit 6-3. In response, the package 4-4 performs the same operation. Note that the output confirmation circuit 6-4 is also mounted on the package 4-4 that is activated last, but this is because the output of the OBP 5-4 does not occur when the confirmation notification signal 7-3 in the previous stage disappears. In order not to stop, the confirmation notification signal 7-4 from the output confirmation circuit 6-4 is input to the control circuit 8-4.
[0037]
As described above, the power supply system according to the embodiment of the present invention can be controlled so as to sequentially rise from the first package 4-1 to the fourth package 4-4. Can be suppressed.
[0038]
Moreover, since it can start in order from a main package, the apparatus 1 can be started up stably. Furthermore, since the power-on sequence processing is realized without using software, the startup sequence of each package can be easily controlled simply by changing the mounting position of each package or changing the backboard pattern. .
[0039]
In the power supply system according to the embodiment of the present invention, the case where the number of packages is four (4-1 to 4-4) (when n = 4) is shown, but the present invention is not limited to this. It is clear that the above can be applied.
[0040]
【The invention's effect】
The first effect of the present invention is that the inrush current at power-on can be reduced without using a relay circuit in the power input stage of the power circuit. The reason is that the control terminals of the second to n-th power supply circuits are used, and the activation control signal is output to the control terminal of the second power supply circuit based on the output of the first power supply circuit. This is because the power supply circuit is activated and the third and subsequent power supply circuits are sequentially controlled to be activated based on the output of the previous power supply circuit.
[0041]
The second effect of the present invention is that the second power supply circuit is activated based on the output of the first power supply circuit, but the output of the first power supply circuit is cut off or changed. The operation of the activated second power supply circuit can be maintained. The reason is that, based on the output of the second power supply circuit in addition to the output of the first power supply circuit, an activation control signal is output to the control terminal of the second power supply circuit. This is because the activation control signal is output to the control terminal based on the output of the power supply circuit in addition to the output of the power supply circuit in the previous stage.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a power supply system according to an embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a conventional power supply system.
FIG. 3 is a diagram showing a configuration of a conventional excessive inrush current prevention circuit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Apparatus 2 Station building power supply 3 Common switch 4-1 to 4-4 Package 5-1 to 5-4 On-board power supply 6-1 to 6-4 Output confirmation circuit 7-1 to 7-4 Confirmation notification signal 8-2 8-4 Control circuit 9-2 to 9-4 Activity control signal

Claims (6)

A power supply system including a first power supply circuit and a second power supply circuit to which an input voltage is applied in common, wherein at least the second power supply circuit has a control terminal for controlling the circuit in an active state;
Based on the output of the first power supply circuit that is output in response to the application of the input voltage, the second power supply circuit is activated with respect to the control terminal to activate the second power supply circuit. the power-on sequence control circuit having a control means for outputting a control signal seen including,
The control unit further outputs the activation control signal to the control terminal of the second power supply circuit based on the output of the second power supply circuit . The first and second power supply circuits are on-board power supplies,
The power supply system according to claim 1 , wherein the control terminal is a remote control terminal . A power supply sequence control circuit in a power supply system including a first power supply circuit and a second power supply circuit to which an input voltage is applied in common, wherein at least the second power supply circuit has a control terminal for controlling the circuit in an active state; ,
Based on the output of the first power supply circuit that is output in response to the application of the input voltage, the second power supply circuit is activated with respect to the control terminal to activate the second power supply circuit. Including control means for outputting a control signal;
The power supply sequence control circuit, wherein the control means further outputs the activation control signal to the control terminal of the second power supply circuit based on the output of the second power supply circuit. The first and second power supply circuits are on-board power supplies,
4. The power-on sequence control circuit according to claim 3, wherein the control terminal is a remote control terminal . Including first to n-th (n is an integer of 3 or more) power supply circuits to which an input voltage is commonly applied, and each of the second to n-th power supply circuits has a control terminal for controlling its own circuit in an active state. A power supply system comprising:
Based on the output of the first power supply circuit output in response to the application of the input voltage, an activation control signal is output to the control terminal of the second power supply circuit, and the i (i) Includes control means for outputting an activation control signal to the control terminal of the (i + 1) th power supply circuit based on the output of the power supply circuit of 2 to n-1.
The control means further outputs an activation control signal to the control terminal of the second power supply circuit based on the output of the second power supply circuit, and outputs the (i + 1) th power supply circuit. On the basis of the power supply system, an activation control signal is output to the control terminal of the (i + 1) th power supply circuit. Including first to n-th (n is an integer of 3 or more) power supply circuits to which an input voltage is commonly applied, and each of the second to n-th power supply circuits has a control terminal for controlling its own circuit in an active state. A power-on control method in a power system having:
Applying the input voltage to the first power supply circuit;
Outputting an activation control signal to the control terminal of the second power supply circuit based on the output of the first power supply circuit output in response to the application of the input voltage; and
Thereafter, based on the output of the i-th (i is an integer from 2 to n-1) power supply circuit, sequentially outputting an activation control signal to the control terminal of the (i + 1) -th power supply circuit. Including
A step of outputting an activation control signal to the control terminal of the second power supply circuit based on the output of the second power supply circuit; and the output of the (i + 1) th power supply circuit based on the output of the (i + 1) th power supply circuit. And a step of outputting an activation control signal to the control terminal of the power supply circuit of (i + 1).

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