JPH10201096A - Power supply control circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain normal operation even if there is a difference in the time until each on-board power source getting to a stable level, in the power supply control circuit of a device which is composed of plural packages and on which on-board power sources to generate the power within the packages, with external power inputted through a common switch to each package, are mounted. SOLUTION: Each package 10-12 is equipped with each voltage monitoring and notice means 10e, 11c, and 12c which notifies each package equipped with a monitoring and control function of normal operation when it detects the voltage of each on-board power source 10d, 11b, and 12b reaching the predetermined level by the supply of power by an external power source 2, and each mounting information notice means 10f, 11a, 12a which notifies each package equipped with the above monitoring and control function of the mounting information which shows the mounting condition to the device of the package. Each package 10-12 equipped with a monitoring and control function is so constituted as to perform the control to start the device at large by receiving the notice of the normal operation and the notice of mounting information from each package and checking both notices of the normal operation and the mounting information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a power supply control circuit. In recent years, in the field of communication devices and information processing devices,
A user (telecommunications carrier) has demanded a device that is easy to handle with high transmission capacity, high functionality, and small size. In order to satisfy these demands, it is necessary to reduce the size of the device. In order to realize a device having a large number of functions, the functions are divided, their roles are clarified, and the functions are integrated. Under such circumstances, there is also a demand for miniaturization of a power supply for driving each part of the device.

[0002]

2. Description of the Related Art FIG. In FIG. 5, reference numeral 80 denotes a device such as a communication device for data or voice. The device 80 is composed of 81 to 84 units,
Reference numeral 81 denotes a monitoring / control unit that monitors functions of each unit of the device 80 and controls functions of the device such as communication, 82 denotes a clock unit that generates a clock signal used in each unit, and 83 denotes a main signal that operates a signal such as a data signal. And 84 are provided in the apparatus and various power supplies (-48 V, +24
V, + 5V, -5.2V, -3.3V, etc.). Reference numeral 85 denotes a central office power supply (such as a commercial AC power supply) for supplying power to the device 80, and SW denotes a power on / off switch.
A switch for switching off.

In the case of the prior art 1, the power supply from the office power supply 85 is turned on by a switch SW, so that
The power is supplied to a power supply unit 84 provided in the
4 generates power of various voltages necessary for the respective parts 81 to 83 to operate the apparatus.

In the configuration of the first prior art, the power supply 84
Since all necessary power is generated for each unit of the device 80, the circuit of the power supply unit 84 is complicated, and it is difficult to reduce the size of the device in terms of wiring for connecting each unit.

FIG. 6 is a block diagram of a second conventional example. In order to improve the conventional example 1, the conventional example 2 shown in FIG. 6 does not have the power supply unit 84 shown in FIG. 6, but is indicated by 86 to 88 on each package (board) on which the units 81 to 83 are mounted instead. A power supply is provided, which is hereinafter referred to as an on-board power supply (indicated by OBP). Each on-board power supply 86-88
Receives the power of the station power supply 85 directly via the switch SW and generates the power to be used in each package. Each of these on-board power supplies is miniaturized by an electronic DC-DC conversion circuit, and power is supplied to each circuit of the package by printed wiring.
0 can be realized.

FIG. 7 is a detailed explanatory diagram of the conventional example 2, and FIG. 8 is an explanatory diagram of operation time when an on-board power supply is used. 7, P1, P2, and P3 correspond to the on-board power supplies 86, 87, and 88 in FIG. The flow of signals (mutual control signals of each unit) when the device 80 is operating normally is shown by the dotted line in FIG. That is, the signal is first transmitted from the main signal unit 83 to the clock unit 82, from the clock unit 82 to the monitoring / control unit 81, and further from the monitoring / control unit 81 via the signal line shown by a double line in FIG. It flows to the part 83. On the other hand, when the power supply switch SW is turned on from off, the on-board power supplies 86 to 88 determine the supply capacity to each load (package) and the load weight (power consumption) as shown in FIG. Since the ratios are different, the startup characteristics are different, and power is not supplied to each load simultaneously.

In the example of FIG. 8, the time required for the voltage of each on-board power supply to reach the operation decision boundary level is determined by the switch SW.
Are turned on, τ1, τ2, τ3, and there is a clear difference in the time when the power supply of each package reaches the power supply stable level.

[0008]

In the configuration shown in the above-mentioned conventional example 2, the voltage rise time required for each package to operate normally when the power is turned on varies. As shown in FIG. 8, when the monitoring / control unit 86 first starts up, the clock unit 8
7. When the main signal section 88 starts operating in order, the signal flow is as shown by the thick line in FIG.

In this case, when the monitoring / control unit operates normally for the first time, correct monitoring / control data cannot be transmitted and received because the packages of the main signal unit 88 and the clock unit 87 to be monitored / controlled at that time are not operating properly. I will fall into the state. That is, since the operation is different from the normal operation when the power is turned on, there is a problem that the operation of each circuit becomes abnormal.

In order to cope with this, it is difficult in terms of circuit functions to unify the ratio of the on-board power supply capability of all packages to the load and the weight of the load. SUMMARY OF THE INVENTION The present invention provides a power supply control circuit that can maintain normal operation even when there is a difference in the time required for each on-board power supply to reach a stable level in an apparatus including a plurality of packages and mounting each on-board power supply in each package. The purpose is to provide.

[0011]

FIG. 1 is a block diagram showing a first principle of the present invention. In FIG. 1, reference numeral 1 denotes an apparatus composed of a plurality of packages, reference numerals 10 to 12 denote packages having respective functional circuits, of which 10 denotes a monitoring / control package having a monitoring / control function, and 11 and 12 denote the same. Packages each having a unique function, 13 is a signal line for notifying mounting information provided between packages 11 and 12 and package 10, and 14 is a voltage monitor between packages provided between packages 11 and 12 and package 10, respectively. A signal line for notification, 2 is an external power supply, and SW is a switch for turning on the external power supply 2 to the apparatus.

In the package 10, 10a is mounting information receiving means, 10b is checking means, 10c is startup notification receiving means, 10d is an on-board power supply (indicated by OBP) provided in the package 10, and 10e is an on-board power supply. Voltage monitoring and notifying means for monitoring a package internal voltage generated from 10d and generating a notification signal indicating whether or not a normal output has been generated, and 10f generates a signal indicating whether or not the package is mounted on the device 1. It is a mounting information notification unit. In the packages 11 and 12, 11
Reference numerals a and 12a denote package mounting information notifying means for notifying to the package 10 whether or not the package is mounted on the apparatus 1 by a level signal (for example, whether or not the ground potential);
Reference numerals b and 12b denote on-board power supplies (indicated by OBP) mounted on the respective packages. Reference numerals 11c and 12c denote voltage monitoring and notifying means for monitoring voltages generated from the respective on-board power supplies 11b and 12b to notify the package 10. is there.

According to the first principle, when the external power supply 2 is supplied to the on-board power supplies 10d, 11b and 12b of the packages 10 to 12 by turning on the switch SW of FIG. Receiving means 10a
In each of the mounting information notification means 1 of the packages 11 and 12
1a, 12a and mounting information notification means 10 of own package
Each of the mounting information from f is received, and the reception result is supplied to the checking means 10b. On the other hand, voltage monitoring and notifying means 10e, 1 for monitoring an internal voltage generated from the on-board power supplies 10d, 11b, 12b of each package and generating a notification signal.
1c and 12c are notifications (binary signals) indicating whether or not the respective internal voltages have exceeded the operation determination boundary level and have operated normally.
Is output. In this case, as shown in FIG. 9, the time required to exceed the operation determination boundary level differs according to each package in the second conventional example. When the normal operation notification from each package is received by the start-up notification receiving unit 10c of the package 10, each reception result is output to the checking unit 10b. The checking unit 10b checks whether a package mounting information notification from each package and a normal operation notification from each package have been received, and when confirming that they have been received, outputs an operation start output. Thereby, the monitoring / control package 10 starts the monitoring / control operation.

FIG. 2 is a block diagram showing the second principle of the present invention.
In FIG. 2, 1,10-12,10a, 10d, 10
f, 11a, 11b, 12a, 12b, and 2 are the same as those of the same reference numerals in FIG. 1 and will not be described. 10 g of package 10 and 11 in packages 11 and 12
Reference numerals d and 12d denote voltage monitoring means for monitoring each on-board power supply and generating a signal indicating whether or not an operation determination boundary level has been exceeded, 10h of package 10, and package 1
Reference numerals 1 and 12 denote logic gates 11a and 12e which control the notification signals of the mounting information notification means 10f, 11a and 12a by signals from the voltage monitoring means 10g, 11d and 12d of each package. Reference numeral 15 denotes a signal line provided between the packages 11 and 12 and the package 10 for notifying mounting information including a voltage monitoring result.

In the second principle configuration, each package 1
1, 12 to the package 10 for monitoring and control,
The mounting information of the mounting information notifying means 11a and 12a is supplied from the logic gates 11e and 12e controlled by the monitoring results of the voltage monitoring means 11d and 12d to the mounting information receiving means 10a of the package 10 via the signal line 15. You. The mounting information in the package 10 is also a voltage monitoring unit 10g.
Is supplied from the logic gate 10h controlled by. When all the mounting information of each package (including its own package) is normally received by the mounting information receiving means 10a,
All the on-board power supplies of each package have exceeded the operation determination boundary level, and the operation of the monitoring and control package 10 is started at that time.

In the second principle configuration, the number of signal lines between packages can be reduced, and the configuration is simplified as compared with the first principle configuration.

[0017]

FIG. 3 is a block diagram of the first embodiment.
This corresponds to the principle configuration of FIG. The first embodiment is an example in which the present invention is applied to a communication device including a monitoring / control unit package 20, a main signal unit package 21, and a clock unit package 22.

In the monitoring / control unit package 20 shown in FIG. 3, reference numeral 200 denotes an on-board power supply (OBP), 201 denotes a voltage monitoring circuit, and 202 denotes that the on-board power supply 200 is in a normal state (state in which the operation is determined to be at a boundary level). A normal notification circuit that generates a ground fault and outputs another level if it is not in a normal state; 203, a normal notification receiving unit that receives a normal notification signal about on-board power from other packages 21 and 22; A normal reception recognizing unit that recognizes whether a normal state has been received from the package, a package mounting information receiving unit 205 that receives package mounting information from other packages 21 and 22, and a 206 that receives mounting information from all other packages. A package mounting information recognizing unit 207 for confirming whether the normal reception and the mounting information confirming unit 20
8 is a package mounting information generating circuit. Reference numeral 23 denotes a signal line for transmitting a normal notification output signal from the packages 21 and 22 to the package 20, and reference numeral 24 denotes packages 21 and 22.
This is a signal line for transmitting package mounting information from the package 20 to the package 20.

In the main signal part package 21 and the clock part package 22, 210 and 220 are on-board power supplies (OBP), 211 and 221 are voltage monitoring circuits, and 2
Reference numerals 12 and 222 denote normal notification circuits, and reference numerals 213 and 223 denote package mounting information generation circuits.

In the configuration of the first embodiment, the on-board power supplies 200, 210 and 220 of each package are simultaneously supplied with power from the local power supply by the switch SW shown in FIG.
The operation determination boundary level is reached at different times according to the respective loads and the like, and power is supplied to the circuit inside each package. The voltage monitoring circuits 201, 211, and 221 monitor the voltages, and drive the respective normal notification circuits 202, 212, and 222 when they reach the operation determination boundary level. As a result, the normal notification circuits 202, 212 and 222 generate ground air (0 V) on the output side by a built-in relay circuit or the like (not shown). The package mounting information generating circuits 208, 213, and 223 generate ground when each package is mounted on a shelf (a housing in which the package is inserted) of the communication device. In the monitoring / control unit package 20, the package mounting information is received first by the package mounting information receiving unit 205, and the package mounting information recognizing unit 206 determines from which package the information (geo) indicating the mounting state is transmitted. recognize.

The normal notification receiving unit 203 of the monitoring / control unit package 20 receives the normal notification output from the packages 21 and 22 from each signal line 23, receives the normal notification output from its own package, and from any package. Whether a signal (geo) indicating a normal operation has been received has been received or not.
Recognize by.

The recognition results of the package mounting information recognizing unit 206 and the normal reception recognizing unit 204 are checked by the normal notification and mounting information checking unit 207, and if the results of the normal receiving recognition and the mounting information recognition match for all packages. , A signal for starting the operation of the monitoring / control circuit is generated. As a result, the monitoring / control unit package 20 starts operating, and the normal operation of the communication device including the other packages 21 and 22 starts.

The normal operation of the communication device is started by, for example, sequentially transmitting polling from the monitoring / control unit package 20 to the other packages 21 and 22, and the start of operation can be checked by a response from each package.

In this manner, normal operation of the communication device when power is applied to each package can be guaranteed. FIG. 4 is a configuration diagram of the second embodiment, and corresponds to the above-described principle configuration of FIG. In the second embodiment, as in the case of the first embodiment shown in FIG.
0, a communication unit provided with a clock unit package 21 and a monitoring / control unit package 22.

In FIG. 4, 20, 21 and 22 are the same as those in FIG.
Reference numerals 200 to 202, 205, and 206 are the same as those in FIG.
Numerals 211 are the same as those in FIG. 3, and 220 to 223 in the clock section package 22 are the same as those in FIG.

Reference numeral 209 in the monitoring / control unit package 20 is a logical product circuit for calculating the logical product of the ground signal of the package mounting information generating circuit 208 and the ground signal of the normal notification circuit 202. Reference numerals 214 and 224 in the clock unit package 22 are AND circuits having the same function as that of the above-described 209. Reference numeral 25 denotes a signal line for transmitting an output generated from the AND circuits 214 and 224 of the packages 21 and 22.

In the configuration of the second embodiment, similarly to the first embodiment, the on-board power supplies 200, 210, and 220 of each package are simultaneously supplied with power from the local power supply by the switch SW shown in FIG. The operation determination boundary level is reached at different times according to the load and the like, and power is supplied to the inside of the circuit of each package. Voltage monitoring circuits 201,
11 and 221 monitor the voltage by the same operation as in the first embodiment, and drive the respective normal notification circuits 202, 212 and 222 when they reach the operation determination boundary level, and the normal notification circuits 202, 212 and 222 A ground (0 V) is generated on the output side. The package mounting information generating circuits 208, 213, and 223 also generate ground when each package is mounted on the shelf of the communication device. In each of the packages 20 to 22, each AND circuit 20
9, 214 and 224, input of the ground signal from the normal notification circuits 202, 212 and 222, and the package mounting information generation circuits 208, 213 and 22 respectively.
The logical AND of the input of the ground signal from 3 is generated to generate a ground signal.

The package mounting information receiving unit 205 of the monitoring / control unit package 20 receives a signal from the internal AND circuit 209 and a signal from each signal line 25 from the main signal unit package 21 and the clock unit package 22. I do. As for the received signal, the package mounting information recognition unit 206 recognizes that the received signal from each package is a ground signal, and when recognized, generates a signal to start the operation of the monitoring / control circuit. At this time, if at least one of the received signals is not a ground signal, no signal for starting operation is generated. The signal for starting this operation is used to monitor and control unit package 20.
Starts the normal operation of the communication device including the other packages 21 and 22.

[0029]

According to the present invention, when the power supply of a device composed of a plurality of packages is supplied by the on-board power supply provided in the individual package, the operation of the output voltage of each on-board power supply when the power to each package is turned on. Normal operation can be performed without the influence of the variation of the definite boundary level. This makes it possible to reduce the size of the device as compared with the case where the common power supply unit of the first conventional example is provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first principle configuration of the present invention.

FIG. 2 is a diagram showing a second principle configuration of the present invention.

FIG. 3 is a diagram illustrating a configuration of a first embodiment.

FIG. 4 is a diagram illustrating a configuration of a second embodiment.

FIG. 5 is a configuration diagram of Conventional Example 1.

FIG. 6 is a configuration diagram of a second conventional example.

FIG. 7 is a detailed explanatory diagram of Conventional Example 2.

FIG. 8 is a diagram illustrating the operation time of the on-board power supply.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device 10 Package (for monitoring / control) 10a Mounting information receiving means 10b Checking means 10c Start-up notification receiving means 10d On-board power supply (OBP) 10e Voltage monitoring and notifying means 10f Mounting information notifying means 11 Package 12 Packages 11a, 12a Mounting information Notification unit 11b, 12b On-board power supply (OBP) 11c, 12c Voltage monitoring notification unit 13 Signal line for mounting information notification 14 Signal line for voltage monitoring notification 2 External power supply SW switch

Claims (2)

[Claims] In a power supply control circuit of a device comprising an on-board power supply which is composed of a plurality of packages and receives an external power supply through a switch common to each package to generate a power supply in the package. The package is
A voltage monitoring and notifying means for notifying a package having a monitoring and control function of a normal operation when detecting that a voltage of an on-board power supply has reached a predetermined level due to an external power supply, and a mounting state of the package in a device; And a package information providing unit for notifying the package having the monitoring control function of the package information. The package having the monitoring / control function includes a unit for receiving the notification of the normal operation from each of the packages. A means for receiving a notification of mounting information; a check for the received notification of the normal operation and the notification of the mounting information; and a control for activating the entire apparatus when confirming the normal operation and the reception of the mounting information from each package. A power supply control circuit characterized in that: 2. The package according to claim 1, wherein each package is provided with a logic gate to which an output of said mounting information notifying means is input and controlled by an output of said voltage monitoring and notifying means, and an output of said logic gate, said monitoring and control function. The package provided with a line for notifying the package provided, the package provided with the monitoring and control function includes means for receiving a notification of the mounting information from the logic gate of each package, and checks the received notification of the mounting information. A power supply control circuit for controlling the activation of the entire apparatus when the normal operation of each package is confirmed.