CS251808B1 - Connecting the power supply - Google Patents

Abstract

The purpose is to solve the connection of a power supply with multiple outputs for powering microprocessor systems. The connection is characterized in that the priority output (12) is connected to a blocking circuit (3), the output of which is connected to the blocking inputs (213, 223, 233) of the subordinate output circuits (21, 22, 23), while the subordinate outputs (212, 222, 232) are connected to a control circuit (.4), which is further connected to a gating circuit (5), the control input (53) of which is connected to a delay circuit (7) and the output (54) is connected to the control inputs (11, 211, 221. 231) of the output circuits (1, 21, 22, 23) either directly or via the control circuit (6). The gating circuit (5) may also have a second control input (52) connected to the second control circuit (520).

Description

It is an object of the invention to provide a power supply and multiple outputs, particularly suitable for powering microprocessor systems.

Requirements are placed on resources intended for powering microprocessor systems, which are not common in other areas of application. It is required that one of the outputs (usually -5V) starts first. It is still required that a loss of voltage on any of the outputs results in a trip of all other outputs. Other requirements are often approached, such as switching off the power supply when one of the outputs is overloaded, when the power supply voltage drops, etc. The known power supply connections either meet these requirements only partially or contain very complex and expensive control circuits.

These disadvantages are not connected to the multi-output power supply according to the invention, which is based on the fact that the preferred output is connected to an input of a blocking circuit whose output is connected to blocking inputs of the slave output circuits, the slave outputs being connected to a control circuit whose output is coupled to the first gating circuit control input, the control input of which is connected to the delay circuit and the output is coupled to the control inputs of the output circuits either directly; or via the control circuit. According to another feature, the gating circuit also has a second control input coupled to the second control circuit. Wiring the power supply fulfills all the required functions while being relatively simple.

The invention will be described in more detail with reference to the accompanying drawing, in which an example of a power supply according to the invention is shown. In the figure, the preferred output µg is connected to the input of the blocking circuit g, the output of which is connected to the blocking inputs 213. 223. 233 of the slave output circuits gg, gg, gg.

The slave outputs gig, 222. 232 are connected by a g control circuit 1, the output of which is connected to the first control input gg of the gating circuit g, whose control input 33 is connected to the delay circuit 2 and the output 54 is connected via the control circuit & inputs 11, 211, 221) 221 of output circuits g, gg, gg. The second control circuit ggg is connected to the second control input gg of the gating circuit g.

operation of the power supply shown in the figure is as follows: after switching on the power supply, the delay circuit 2 P ° sends a signal to the control input 53 of the gating circuit g for a period of time, about 100 ms, blocking the signal from the first control input 51 gg.

Control circuit & sends a control signal to control inputs U, 211. 221. 231 all output circuits g, 21. 22. 22 · Until the prescribed output voltage is reached at the preferred output gg, the blocking circuit g blocks via the blocking inputs 213. 223. ggg slave output circuits gg, gg, gg.

As soon as the voltage at the preferred output gg reaches the prescribed value, the blocking of the slave output circuits gg, gg, 23 ends, and the corresponding output voltage appears at the slave outputs 212. 222. 23¾. This process must be completed until the signal emitted by the delay circuit 2o about the control input gg of the gating circuit g terminates.

From this moment, the passage of the signals through the gating circuit g is released. The control circuit g checks for the presence of voltage at the slave outputs 212. 222. 232. In the absence of a voltage at one, the control circuit g sends a signal to the first control input gg of the gating circuit g which switches off the output circuits g, gg, gg. , gg.

In the event of a power outage at the preferred output 12, the blocking circuit g blocks the slave output circuits gg, gg, gg, which further results in switching off all the output circuits g, gg, gg, 23 by the control circuit g which receives a signal through the gating circuit gz. The second control circuit 520 serves, for example, to control the input supply voltage.

If the supply voltage falls below a predetermined limit, the second control circuit 520 sends a signal to the second control input gg of the gating circuit g that turns off all output circuits g, gg, 22, via the control circuit 8, gg.

Claims (2)

1. A multiple-output power supply circuit, characterized in that the preferred output (12) is coupled to the input of the interlock circuit (3), the output of which is connected to the interlock inputs (213, 223, 233) of the slave output circuits (21, 22, 23). ) and the slave outputs (212, 222 232) are connected to a control circuit (4), the output of which is connected to a first control input (51) of the gating circuit (5), whose control input (53) is connected to the delay circuit (7) and the output (54) is coupled to the control inputs (11, 211, 221, 231) of the output circuits (1, 21, 22, 23) either directly or via the control circuit (6). 2. The power supply circuit of claim 1, wherein the gating circuit (5) also has a second control input (52) coupled to the second control circuit (520).