JPH06291479A - On-state insertion and removal unit - Google Patents

Abstract

PURPOSE:To insert and remove an electronic unit in an ON state without lowering the mounting density of an electronic circuit package even when the capacity of a bypass capacitor is increased by a method wherein an inrush-current suppression part such as a coil or the like is used in common. CONSTITUTION:In a state that an electronic circuit package 31 is inserted halfway into a back board 10, a capacitor in the electronic circuit package 31 is charged via an inrush-current suppression part, a precharging power supply pattern 12 and a switch without the intermediary of a main power supply pattern 13 on the back board 10. Then, in a state that the electronic circuit package 31 connected perfectly to the back board 10, the switch is turned off, power is supplied to an IC or the like on the electronic circuit package 31 via the main power supply pattern 13 on the back board 10, and a signal route is connected for the first time. Thereby, even when the capacity of the bypass capacitor is increased, an electronic package in an ON state can be inserted and removed without lowering the mounting density of the electronic circuit package.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to hot-plugging technology for electronic circuit packages.

[0002]

2. Description of the Related Art FIG. 6 is an explanatory view of a conventional hot-swap unit U2, FIG. 6 (1) is a perspective view showing the whole thereof, and FIG. 6 (2) shows an electronic circuit package 61. It is a figure which shows the state half-inserted to the connector 51 for backboards. In addition, in FIG. 6A, the ground pattern 4 is used.
1, precharge power supply pattern 42, main power supply pattern 4
3, the signal pattern 44 and the backboard connector 51 are omitted.

As shown in FIG. 6A, the unit frame F2
The backboard 40 is fixed to the back of the unit frame F2
A plurality of electronic circuit packages 61, 62, 63, ..., 6
n is stored, and a plurality of backboard connectors including the backboard connector 51 are provided on the backboard 40, and the electronic circuit packages 61, 62, 63, ... It is connected.

By the way, each electronic circuit package 61, 6
In order to enable hot plugging / unplugging of 2, 63, ..., 6n, it is necessary to prevent the terminals of the backboard connector from being damaged by the inrush current. Inrush current is suppressed and each electronic circuit package 61, 62, 63, ..., 6n
In order to prevent the ICs inside the ICs from being destroyed, it is necessary to turn on the power supply before signals are input to the ICs inside the electronic circuit packages 61, 62, 63, ..., 6n.

In order to suppress the inrush current as described above, focusing on the electronic circuit package 61, the precharge power supply pattern terminal 5 of the backboard connector 51 is used.
The coil 6 is connected to the precharge terminal t612 connected to
Connect one terminal of 1L, backboard connector 5
The other end of the coil 61L is connected to the main power supply terminal t613 connected to the first main power supply pattern terminal 513. By providing the coil 61L in this manner, it is possible to suppress the inrush current generated at the start of charging the bypass capacitor 61C mounted on the electronic circuit package 61 and used for noise removal or the like. Some electronic circuit packages with low power use a resistor in place of the coil 61L.

Further, in order to turn on the power supply before a signal is input to the IC or the like in the electronic circuit package 61, a signal pattern terminal 514 connected to the signal pattern 44 of the backboard 40, Before the signal terminal t614 connected to the signal pattern 614 of the electronic circuit package 61 is connected, the electronic circuit package 61
It is necessary to turn on the power of the IC inside. Specifically, the precharge terminal t6 of the electronic circuit package 61
12. The main power supply terminal t613 is composed of a long terminal and a short terminal, respectively, and the precharge terminal t612 is always connected to the terminal of the backboard connector 51 earlier than the main power supply terminal t613. ing. The ground terminal t611 and the signal terminal t614 of the electronic circuit package 61 are long terminals and short terminals, respectively. As a result, before the signal terminal t614 of the electronic circuit package 61 is connected to the backboard connector 51, the IC in the electronic circuit package 61 is turned on via the precharge power supply pattern 42.

[0007]

By the way, as the density of the electronic circuit package increases, the power consumption of the electronic circuit package increases, and the capacity of the bypass capacitor increases, the inrush current also increases. If the coil 61L is used to suppress the increase of the inrush current, the outer shape of the coil 61L becomes extremely large, so that the mounting area of the coil 61L increases and the mounting density of the electronic circuit package decreases.

According to the present invention, when the capacity of the bypass capacitor is increased due to the increase in power consumption in the electronic circuit package, the hot plugging / unplugging can be performed without reducing the mounting density of the electronic circuit package. It is intended to provide a unit.

[0009]

According to the present invention, a main power supply pattern and a precharge power supply pattern are separately provided on a backboard, and an inrush current suppressing portion such as a coil connecting them is provided on the backboard or the like. , The ground terminal and the precharge terminal in the electronic circuit package are set longer than the main power supply terminal and the signal terminal, and a switch is provided between the precharge terminal and the power supply pattern of the electronic circuit package, With the electronic circuit package half-inserted into the backboard, the bypass capacitor of the electronic circuit package is charged via the inrush current suppressor, precharge power supply pattern, and switch without passing through the main power supply pattern of the backboard. The electronic circuit package is fully connected to the backboard, the switch is turned off and the back Power to the IC of the electronic circuit package is supplied via the main power supply pattern of the board, in which the signal path is first connected.

[0010]

According to the present invention, when the electronic circuit package is half-inserted in the backboard, it does not go through the main power supply pattern of the backboard, but does go through the inrush current suppressing unit such as a coil, the precharge power supply pattern, and the switch. Then, the bypass capacitor of the electronic circuit package is charged, and the switch is turned off while the electronic circuit package is completely connected to the backboard, and power is supplied to the IC, etc. of the electronic circuit package via the main power supply pattern of the backboard. Is supplied and the signal path is connected for the first time, the inrush current suppressing unit such as a coil can be shared. Therefore, even if the capacitance of the bypass capacitor increases due to the increase in power consumption in the electronic circuit package, the electronic circuit package It is possible to perform hot plugging and unplugging without lowering the mounting density.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a hot-swap unit U1 which is an embodiment of the present invention, and FIG. 1 (1) is a perspective view of the above embodiment viewed from the rear side, and FIG. Shows the relationship between the electronic circuit package 31 and the backboard 10 in the above embodiment.
It is explanatory drawing of the state half-inserted to 0.

The hot-swap unit U1 includes a plurality of electronic circuit packages 31, 32, 33, ..., 3n, a backboard 10 for supplying power to these electronic circuit packages 31, 32, 33 ,. It has a frame F1.

The backboard 10 has an earth pattern 1
1, a precharge power source pattern 12, a main power source pattern 13 connected to the main power source 16, and a signal pattern 14.
, A coil 15, and a backboard connector 21 are provided.

The precharge power supply pattern 12 is separated from the main power supply pattern 13, and the coil 15 is an example of an inrush current suppressing portion connecting the main power supply pattern and the precharge power supply pattern.

The backboard connector 21 has a ground pattern terminal 211 connected to the ground pattern 11.
, A precharge power source pattern terminal t212 connected to the precharge power source pattern 12, a main power source pattern terminal t213 connected to the main power source pattern 13, and a signal pattern terminal t21 connected to the signal pattern 14.
And 4 are provided.

Each package provided with the ground pattern 11, the precharge power supply pattern 12, and the main power supply pattern 13 is connected to the backboard 10 by a connector (not shown).

The electronic circuit package 31 includes a ground pattern 311, a power source pattern 313 connected to a power source terminal such as an IC, a signal pattern 314 connected to an input / output terminal such as an IC, an insertion / extraction lever L1, and a switch. 31S
And a bypass capacitor 31 used for noise removal, etc.
C and an electronic circuit package connector are provided.

The insertion / extraction lever L1 is used for the electronic circuit package 3
1 is interlocked with the operation of inserting / removing 1 from the backboard connector 21, the switch 31S is interlocked with the insertion / extraction lever L1, and is a switch that connects the precharge terminal t12 and the power supply pattern 313. And
When the electronic circuit package 31 is completely inserted into the backboard 10, the precharge terminal t12 of the electronic circuit package 31 and the power supply pattern 313 are separated by the switch 31S, whereby a plurality of electronic circuit packages 31, 32, 33, ..., 3n coil 15
Are shared.

The projection P1 is provided at a position of the unit frame F1 opposite to the backboard 10 and corresponding to a position where the electronic circuit package 31 is inserted into the unit frame F1. The insertion lever L1 when the electronic circuit package 31 is completely inserted into the unit frame F1
Is rotated, and the switch 31S is turned off in response to the rotation of the insertion lever L1.

The electronic circuit package connector has a grounding terminal t11, a precharging terminal t12, a main power source terminal t13 connected to the power source pattern 313, and a signal terminal t14. Terminal t1
1 is a long terminal, the precharge terminal t12 is a middle terminal, and the main power supply terminal t13 and the signal terminal t14 are short terminals.

Before the main power source terminal t13 is connected to the main power source pattern 13, the power source pattern 313 of the electronic circuit package 31 is connected to the precharge power source pattern 12 via the switch 31S and the precharge terminal t12. After that, when the main power supply terminal t13 is connected to the main power supply pattern 13, the switch 31S is turned off by the insertion / removal lever L1, and the signal terminal t14 is connected to the signal pattern 14 of the backboard 10. ing.

Electronic circuit packages 32, 33, ..., 3n
The configuration of is similar to that of the electronic circuit package 31.

Next, the operation of the above embodiment will be described.

First, when the electronic circuit package 31 is not inserted into the unit frame F1, the insertion / extraction lever L1 is not pushed by the projection P1, so that the switch 31S is maintained in the ON state.

Then, the electronic circuit package 31 is gradually inserted into the unit frame F1, and the electronic circuit package 31 is half-inserted into the backboard 10 as shown in FIG. In the present specification, the "half-inserted state" means the grounding terminal t1 of the electronic circuit package connector.
1 is connected to the ground pattern terminal 211, and the precharge terminal t12 is the precharge power pattern terminal 2
12 is a state in which the main power supply terminal t13 and the signal terminal t14 of the electronic circuit package connector are not connected to the connector 21. In this state, the switch 31S is on, and the current from the main power source 16 is
Inrush current suppression coil 15, precharge power supply pattern 1
2. Precharge power source pattern terminal 212, precharge terminal t12, switch 31S, power source pattern 31
3 and flows into the bypass capacitor 31C, the bypass capacitor 31C is instantaneously charged, and becomes a voltage that enables the operation of the IC and the like in the electronic circuit package 31.

Further, since the inrush current flowing through the bypass capacitor 31C always passes through the coil 15, the coil 15 suppresses the inrush current. In this case,
The main power supply terminal t13 of the electronic circuit package 31 is the main power supply pattern terminal 213 of the backboard connector 21.
Since it is not connected to, the path for directly charging the bypass capacitor 31C without passing through the coil 15 is cut off, and the coil 15 reliably suppresses the inrush current.

FIG. 2 is an equivalent circuit diagram showing a state where the electronic circuit package 31 is half-inserted into the backboard 10 as described above, and the electronic circuit packages 32, 33, ... Other than the electronic circuit package 31. 3n is shown fully connected to the backboard 10.

In FIG. 2, the portion surrounded by the broken line is the electronic circuit package, and the portion other than these and the main power supply 16 is the backboard 10. Note that reference numerals 32C and 3
3C, ..., 3nC are bypass capacitors, reference numeral 32S,
33S, ..., 3nS represent switches.

Next, the electronic circuit package 31 is completely inserted into the backboard 10.

FIG. 3 is an explanatory view showing a state where the electronic circuit package 31 is completely connected to the backboard 10 in the above embodiment.

In this case, the ground terminal t11 of the electronic circuit package connector is connected to the ground pattern terminal 211, the precharge terminal t12 is connected to the precharge power pattern terminal 212, and the electronic circuit package connector is also connected. The main power supply terminal t13 is connected to the main power supply pattern terminal 213, and the signal terminal t14 is connected to the signal pattern terminal 214. In this state, the protrusion P1 rotates the insertion / extraction lever L1 and the switch 31S is turned off in conjunction with this rotation.
The path for charging the bypass capacitor 31C via the inrush current suppressing coil 15 is cut off, while the main power supply terminal t
Since 13 is connected to the main power source pattern terminal 213, the main power source pattern 13 and the main power source pattern terminal 21
3, via the main power supply terminal t13, the power supply pattern 31
3, the main power source 16 is applied, and the main power source 16 is applied to a power source terminal such as an IC. In this case, the bypass capacitor 31
Since the charging to C is completed, it is not necessary to suppress the inrush current.

FIG. 4 shows a state where the electronic circuit packages 32, 33, ..., 3n are completely connected to the backboard 10 and then the electronic circuit package 31 is completely connected to the backboard 10 in the above embodiment. FIG. 5 is an equivalent circuit diagram shown, and FIG. 5 is a diagram showing changes in applied voltage in the above-described embodiment.

The description of the above operation is given in the electronic circuit package 3.
1 is taken as an example, but the operation of the electronic circuit packages 32, 33, ..., 3n is similar to that of the electronic circuit package 31, and the rush current is suppressed in each case. For coil 1
5 is used, and since it is sufficient to provide only one coil 15 for suppressing the inrush current as described above, the mounting density of the electronic circuit package can be reduced as compared with the conventional case where the coil is provided for each electronic circuit package. Even when the capacitance of the bypass capacitor increases due to the increase in power consumption in the electronic circuit package, hot plugging and unplugging can be performed without lowering the mounting density of the electronic circuit package.

In the above embodiment, the coil 15 is mounted on the backboard 10 so that the coil 15 is not affected by the insertion / removal of the electronic circuit packages 31, 32, 33, ..., 3n. Package 3
3n may be mounted on a small board (not shown) different from 1, 32, 33, ..., 3n. Further, in the above-described embodiment, the main power source 16 is provided outside the hot-swap unit U1, but the main power source 16 may be mounted in the hot-swap unit U1 similarly to the electronic circuit packages 31 to 3n. You may Further, the inrush current suppressing coil 15 may be installed on the main power source pattern 13.

In the above embodiment, in the electronic circuit package connector, the ground terminal t11 is a long terminal, the precharge terminal t12 is a middle terminal, and the main power supply terminal t13 and the signal terminal t14 are short terminals. However, the grounding terminal t11 may be a middle terminal and the precharging terminal t12 may be a long terminal.
3 and the signal terminal t14, the ground terminal t
11 and the precharge terminal t12 may have the same length. That is, in the above electronic circuit package connector, the ground terminal t11 and the precharge terminal t12.
Are set longer than the main power supply terminal t13 and the signal terminal t14.

[0036]

According to the present invention, in the state where the electronic circuit package is half-inserted in the backboard, the rush current suppressing portion such as the coil, the precharge power supply pattern, without passing through the main power supply pattern of the backboard, Via the switch,
Charges the bypass capacitor of the electronic circuit package,
With the electronic circuit package completely connected to the backboard, the switch is turned off, power is supplied to the IC etc. of the electronic circuit package via the main power supply pattern of the backboard, and the signal path is connected for the first time. A rush current suppressing unit such as a coil can be shared, and therefore, even if the capacitance of the bypass capacitor increases due to an increase in power consumption in the electronic circuit package, hot plugging and unplugging is performed without reducing the mounting density of the electronic circuit package. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an embodiment of a hot-swap unit U1 according to the present invention.
FIG. 1 (1) is a perspective view of the above embodiment as seen from the back side, and FIG. 1 (2) shows the relationship between the electronic circuit package 31 and the backboard 10 in the above embodiment. It is explanatory drawing of the state which half-inserted the package 31 to the backboard 10.

FIG. 2 shows an electronic circuit package 31 in the above embodiment.
3n is an equivalent circuit diagram showing a state in which the backboard 10 is half-inserted, and shows a case where the electronic circuit packages 32, 33, ..., 3n other than the electronic circuit package 31 are completely connected to the backboard 10. It is shown.

FIG. 3 shows an electronic circuit package 31 in the above embodiment.
FIG. 3 is an explanatory diagram showing a state in which is completely connected to the backboard 10.

FIG. 4 shows the electronic circuit package 3 in the above embodiment.
3n is an equivalent circuit diagram showing a state in which electronic circuit package 31 is completely connected to backboard 10 after 2, 33, ..., 3n are completely connected to backboard 10.

FIG. 5 is a diagram showing changes in applied voltage in the above-mentioned embodiment.

FIG. 6 is an explanatory view of a conventional hot-swap unit U2,
FIG. 6 (1) is a perspective view showing the whole thereof.
(2) is a diagram showing a state in which the electronic circuit package 61 is connected to the backboard connector 51.

[Explanation of symbols]

U1 ... Hot-swap unit, F1 ... Unit frame, 10 ... Backboard, 11 ... Ground pattern, 12 ... Precharge power supply pattern, 13 ... Main power supply pattern, 14 ... Signal pattern, 15 ... Inrush current suppressing coil, 16 ... Main Power source, 21 ... Backboard connector, 211 ... Ground pattern terminal, 212 ... Precharge power pattern terminal, 213 ... Main power pattern terminal, 214 ... Signal pattern terminal, 31, 32, 33-3n ... Electronic circuit Package, 31C, 32C, 33C to 3nC ... Bypass capacitor, 31S, 32S, 33S to 3nS ... Switch, 311 ... Ground pattern, 313 ... Power supply pattern, 314 ... Signal pattern, t11 ... Ground terminal, t12 ... Precharge terminal , T13 ... Main power supply terminal, t14 ... Signal end , L1 ... the lever, P1 ... projections.

Claims (1)

[Claims] 1. A hot-swap unit having a plurality of electronic circuit packages and a backboard for supplying power to these electronic circuit packages, wherein the backboard has a main power source pattern connected to a main power source and a main power source pattern. Precharge power supply pattern separated from the power supply pattern, ground pattern, signal pattern,
A backboard connector having terminals respectively connected to the main power source pattern, the precharge power source pattern, the ground pattern, and the signal pattern is provided, and the electronic circuit package is provided with the electronic circuit package. A connector for an electronic circuit package that has an insertion / removal lever that interlocks with the operation of inserting / removing from the board, a power supply pattern, a main power supply terminal connected to this power supply pattern, a precharge terminal, a signal terminal, and a ground terminal, A switch that interlocks with the insertion / removal lever and connects the precharge terminal and the power supply pattern is provided,
The grounding terminal and the precharging terminal are set longer than the main power supply terminal and the signal terminal, the inrush current suppressing unit connecting the main power supply pattern and the precharge power supply pattern, The power supply pattern of the electronic circuit package is provided on a portion other than the electronic circuit package or on the backboard and before the main power supply terminal is connected to the main power supply pattern, the switch and the precharge terminal are provided. And when connected to the main power supply through the precharge power supply pattern, the main power supply terminal is connected to the main power supply pattern,
The hot-swap unit, wherein the switch is turned off by the insertion / extraction lever, and the signal terminal is connected to the signal pattern of the backboard.