JPH0251321A - Packaged power supply circuit - Google Patents

Abstract

PURPOSE:To withstand against a load where current consumption fluctuates abruptly and considerably between operating time and waiting time by normally making a choke coil ineffective. CONSTITUTION:An input source line 1 is connected through a choke coil 2 with an electronic circuit 4. A relay 5 is connected to the output of the choke coil 2 and grounded through the contact of a lock switch 6. The contact of the relay 5 bypasses the choke coil 2. When a package is inserted, the lock switch 6 is turned to the break contact side so that the relay 5 does not function and abrupt fluctuation of current is suppressed through function of the choke coil 2. The lock switch 6 is normally turned to make side so that the relay 5 functions to bypass the choke coil 2. By such arrangement, fluctuation of power source can be avoided regardless of abrupt fluctuation of necessary current.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an in-package power supply circuit, and more particularly to an in-package power supply circuit that nullifies a choke coil inserted in series in a power supply circuit during normal operation.

[Conventional technology]

Conventionally, as shown in the conventional in-package power supply circuit block diagram in FIG. After passing through a choke coil 33 for the purpose of preventing a voltage drop from occurring in the line and having an adverse effect on other normal packages, the electronic circuit 3
It was supposed to be supplied to 4. As shown in the power supply system diagram in the electronic device in FIG. 2, packages 22, 23, and 24 of this type were connected in parallel to the power supply 21.

[Problem to be solved by the invention]

In the conventional in-package power supply circuit described above, a choke coil is mounted on each package in order to avoid the adverse effects of voltage fluctuations when replacing individual packages. However, as a recent trend in electronic circuits, in order to reduce power consumption as much as possible, electronic circuits, including microprocessors, are adopting circuits whose current consumption changes rapidly and significantly between operating and standby states. It has become. For this reason, in conventional in-package power supply circuits that simply use choke coils, the choke coil's characteristics prevent a sudden increase in current, which prevents the current from increasing rapidly at the moment of transition from a small current consumption state to a large current consumption state. If the voltage temporarily drops and this voltage change exceeds the operating permissible voltage of the electronic circuit, there is a problem that the electronic circuit will malfunction.

This state will be explained with reference to the current and voltage waveform diagram of the electronic circuit in the package shown in FIG.

A large current 41 indicates the current consumption during operation of the electronic circuit, a normal voltage 42 indicates the voltage supplied to the electronic circuit via the choke coil, and a fluctuating voltage 43 indicates the change from a small current consumption state to a large current consumption state. It shows the maximum value of voltage change during transition. Here, the normal voltage 42 is normally supplied with +5 volts, but when the large current 41 is generated, the voltage drops to the variable voltage 43 due to the characteristic of the choke coil that prevents a sudden increase in current. At this time, assuming that the allowable operating voltage of the electronic circuit is +4.5 volts, the electronic circuit will malfunction if the fluctuating voltage 43 falls below +4.5 volts.

The purpose of the present invention is to avoid the negative effects of voltage fluctuations when replacing individual packages, while disabling choke coils during normal times, thereby preventing sudden and large fluctuations in current consumption between operating and standby states. An object of the present invention is to provide an in-package power supply circuit that can withstand loads.

[Means to solve the problem]

The in-package power supply circuit of the present invention is an in-package power supply circuit for a plurality of packages including electronic circuits constituting an electronic device, and includes a relay that operates normally in each package and resets the electronic circuit in the package. A lock-type switch that also serves as a reset power supply and a relay operating power supply for operating the relay is provided, and the make contact of the relay is connected in parallel to a choke coil inserted in series in the power supply circuit between the external power source and the load. This is a configuration that provides

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a package according to an embodiment of the present invention. FIG. 1(a) is a block diagram showing a state when a package is replaced, and FIG. 1(b) is a block diagram showing a normal state.

The input power line 1 is connected to a choke coil 2 and a contact 3 of a relay. Opposite sides of the choke coil 2 and the contacts 3 of the relay are both connected to an electronic circuit 4 and a winding of the relay 5. The opposite side of the winding of the relay is connected to the make contact side of the lock type switch 6. The break contact side of the lock type switch 6 is connected to the electronic circuit 4 and has a reset function for it.

Next, the operation will be explained.

At first, the package is inserted, but in that case, the lock type switch 6 is turned to the break contact side. Therefore, the relay 5 does not operate, and the current from the input power supply line 1 reaches the electronic circuit 4 via the choke coil 2. Therefore, inserting the package will not have any negative impact on the outside.

Next, when all the packages have been inserted, the lock type switch 6 of each package is turned to the meter contact side. This causes the relay 5 to operate, closing the relay contacts 3 and short-circuiting the choke coil 2. Thereafter, even if the electronic circuit 4 shifts from the small current consumption state to the large current consumption state, the choke coil 2
Power fluctuations caused by this will not occur.

〔Effect of the invention〕

As explained above, the present invention avoids the negative effects of voltage fluctuations when replacing individual packages, and disables the choke coil during normal times, thereby reducing current consumption rapidly during operation and standby. This has the effect of providing an in-package power supply circuit that can withstand a load that fluctuates significantly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a package according to an embodiment of the present invention;
Fig. 1(a) is a block diagram showing the state when replacing the package, Fig. 1(b) is a block diagram showing the normal state, Fig. 2 is a power supply system diagram inside the electronic device, and Fig. 3 is a block diagram showing the state when replacing the package. FIG. 4, a block diagram of a conventional power supply circuit in a package, is a current and voltage waveform diagram of an electronic circuit in a package. 1.32... Input power line, 2,33...
・Choke coil, 3...Relay contact, 4,
34...Electronic circuit, 5...Relay, 6
...Lock type switch, 21...Power supply, 22.23.24...Package, 41...
...Large current, 42...Normal voltage, 43...
...Fluctuating voltage.

Claims (1)

[Claims] In an in-package power supply circuit for a plurality of packages including electronic circuits constituting an electronic device, each package includes a relay that operates under normal conditions, a reset power that resets the electronic circuit in the package, and a relay that operates the relay. An in-package power supply characterized in that a lock-type switch that also serves as an operating power supply is provided, and a make contact of the relay is provided in parallel to a choke coil inserted in series in a power supply circuit between an external power supply and a load. supply circuit.