JPH01149115A - Electric power supply unit - Google Patents

Abstract

PURPOSE:To reduce the cost by using the output of a power supply circuit, which is first raised as the fall indicating signal of a following power supply circuit. CONSTITUTION:An A power supply circuit 1, a B power supply circuit 2,... an N power supply circuit (n) are connected to a common AC power source. The start input of the A power supply circuit 1 is given from the external line a higher-order device, and its DC output A is given to a load and the start input of the B power supply circuit 2. A DC output N-1 of an N-1 power supply circuit is given to the start input of the N power supply circuit (n) in this manner. Each power supply circuit consists of a rectifying circuit 21, a DC-DC converter 22, and a start circuit 23, and the start circuit 23 takes a required timing by application of a start input signal to give the operation indication to the DC-DC converter 22. Consequently, the AC input is preliminarily inputted and the DC output is obtained by the delay to the rise time of the converter 22 at the time of start input.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device, and more particularly to a power supply device that has a plurality of power supply circuits and requires ordering of the rise timing of the outputs of the power supply circuits.

[Conventional technology]

Conventionally, this type of power supply device is provided with a power supply control unit that generates a rising instruction signal with a predetermined time difference corresponding to a plurality of power supply circuits, and the instruction signal from the power supply control unit is used to control each power supply. It starts up the circuit and gives a sequence to the rise of the output.

[Problem that the invention seeks to solve]

However, the conventional power supply device described above requires a power control unit for the device, and if output cannot be obtained due to a failure in a specific power supply circuit, protection such as preventing the subsequent power supply circuit from starting up is provided. This method has the problem of requiring a circuit and increasing costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a power supply device in which a conventional power supply control unit is removed and costs are reduced by using the output of a power supply circuit that is started up first as an instruction signal for powering up the next power supply circuit. .

[Means for solving problems]

The power supply device of the present invention has a plurality of power supply circuits, and in a power supply device in which the rise timings of the outputs of the power supply circuits are sequenced, the output of the power supply circuit whose output is started first is set to the power supply whose output is turned on next. It is configured by using it as an instruction signal for the rise of the circuit.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, showing a case where outputs are required to rise sequentially from DC output A to DC output N, each receiving a common AC power source. 1st
In the figure, A power supply circuit 1, B power supply circuit 2...
Each of the n AC inputs of the N power supply circuit n is connected to a common AC
Connected to power.

The starting input of the A power supply circuit 1 is given from the outside, such as a host device, and its DC output A is given to the load and also to the starting input of the B power supply circuit 2.

The DC output B of the B power supply circuit 2 is applied to another load and also to the starting input of the next power supply circuit (not shown). In this way, the DC output N- of the N-1 power supply circuit
1 is configured to be applied to the starting input of the N power supply circuit n.

FIG. 2 is a block diagram of an example of the power supply circuit shown in FIG. 1, which is composed of a rectifier circuit 21, a DC-DCC converter 22 and a starting circuit 23. 23 produces a DC power supply for control, and gives an operation instruction to the DC-DC converter 22 at the necessary timing from the application of the start input signal. on the other hand,
The rectifier circuit 21 starts operating upon application of AC input, and
- A predetermined DC voltage is obtained when the DC converter 22 starts operating. Therefore, when AC input has been input in advance and startup input is given, DC
- DC output can be obtained by delaying the rise time of the DC converter, or by providing another timing circuit in the startup circuit 23, it is also possible to obtain DC output by delaying the required time from the application of the startup input. .

Therefore, in Fig. 1, it is possible to sequentially start the DC rectangular B from the rise of the DC output A, and to make the DC output N rise sequentially. This can be easily done by adjusting the timing of the startup circuit 23 in the power supply circuit.

Note that in the above embodiment, each of the plurality of power supply circuits in the power supply device receives AC input, rectifies it, and performs DC-DC conversion. It is clear that this is not the case.

Furthermore, in the above embodiments, a case was described in which orderliness is required for power up, but if the power supply circuit has a stop input in addition to a start input, the same configuration is used to control each DC output when the power is turned off. It is also possible to give order to the falling edge.

〔Effect of the invention〕

As described in detail above, the present invention provides a power supply control system that generates a sequence signal for starting each power supply circuit in a power supply device having a plurality of power supply circuits and in which the rise timing of the output of the power supply circuits is sequenced. without establishing a section.
This has the effect that the necessary output rise sequence can be obtained with a paper storage circuit configuration. Further, according to the present invention, it is possible to essentially prevent generation of subsequent outputs by skipping the order.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a block diagram of an example of a power supply circuit used in the figure. 1.2~N... Power supply circuit, 21... Rectifier circuit, 22... DC-DC converter, 23
...Start circuit. Agent Patent Attorney Oto Uchihara

Claims (1)

[Claims] In a power supply device that has multiple power supply circuits and the timing of the rise of the output of those power supply circuits is sequenced, the output of the power supply circuit whose output is started first, and the output of the power supply circuit whose output is started next, is instructed to rise. A power supply device characterized in that it is a signal.