JPH05336657A - Power supply controller - Google Patents

Abstract

PURPOSE:To make it possible to generate power throw-in sequence and power interruption sequence for semiconductor tester. CONSTITUTION:Upon turn ON of a power switch 1, an oscillator 3 begins to oscillate and a counter 4 begins to count output clocks therefrom and delivers an address to a non-volatile memory 5. A relay driver 6 makes/breaks relays 7, 8, 9, 10 according to a sequence previously programmed in the non-volatile memory 5 as the counter 4 counts up thus connecting/disconnecting machines 11, 12, 13, 14 with/from an AC power supply.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control device for generating a power-on / power-off sequence used in a semiconductor tester or the like.

[0002]

2. Description of the Related Art Conventionally, in a test apparatus such as a semiconductor test apparatus, when powering on each device constituting the apparatus,
It is necessary to turn on the power of each device in order, depending on the conditions of the device, instead of turning on at the same time. A power supply control device that controls such a power-on sequence uses a time constant of a capacitor / resistor for generation of the power-on sequence, or is configured to generate a sequence by being controlled by a computer. ing.

[0003]

However, in the above-mentioned conventional power supply control device, when the time constant of the capacitor / resistor is used, the accuracy and resolution of the sequence that can be set are low, and there are several types of time constants that can be changed. You have to replace the capacitors and resistors.

In computer control, the accuracy and resolution of the sequence are high, but if the program runs away, the power may not be turned on. If there is a device that generates a high voltage, the sequence may become abnormal. There was the problem of being in a dangerous state.

The present invention solves the above-mentioned conventional problems and enables the time setting of the sequence to be set with high accuracy and high resolution, and the power-on sequence and the power-off associated with the system change. It is an object of the present invention to provide an excellent power supply control device which can be easily changed and operates reliably when the sequence needs to be changed.

[0006]

In order to achieve the above object, the present invention provides an oscillator which starts oscillating at the same time when the main power source of the device is turned on, and a counter which counts by a signal oscillated by the oscillator. And a non-volatile memory programmed to generate a sequence signal of power-on and power-off, using the signal generated by the counter as an address, and connecting / disconnecting the power source by the sequence signal generated by the non-volatile memory. A plurality of relays corresponding to each device and a relay driver for driving a sequence signal generated by the non-volatile memory are provided, and a sequence of power-on and power-off of each device is generated.

[0007]

According to the present invention, it is possible to generate a sequence of power-on and power-off with high precision and high resolution by a stable oscillator and a program of the non-volatile memory, and by simply replacing the non-volatile memory, This has an effect that the sequence of power-on and power-off accompanying a system change can be easily changed.

[0008]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In FIG. 1, 1 is a power switch,
Connect / disconnect AC power. 2 is a DC power supply device,
DC power is supplied to each of the oscillator 3, the counter 4, the non-volatile memory 5, the relay driver 6, and the AND circuit 15.

The oscillator 3 generates a clock S6 which is the basis of sequence timing. The counter 4 is the oscillator 3
The clock S6 oscillated in step S4 is divided to generate output signals S7 to S11. The nonvolatile memory 5 uses the signals S7 to S11 generated by the counter 4 as memory addresses and writes sequence timings at power-on / power-off. Further, a power-on sequence end signal S16 indicating that the power-on sequence is completed is generated. The relay driver 6 uses the sequence signal from the non-volatile memory 5 to relay 7,
8, 9 and 10 are connected / disconnected via control lines S12 to S15.

The relays 7, 8, 9 and 10 are distributed to the A
C Connect / disconnect the power source S1. 11, 12, 13, and 14 are devices that operate with the distributed AC power sources S2, S3, S4, and S5, and the devices 11, 12, 13, and 14 are relays 7, 8, 9, and
Connected with 10, respectively. An AND circuit 15 generates a counter end request signal S19 when the alarm signal S17 and the power-off request signal S18 are disabled and the power-on sequence end signal S16 is enabled.

A power supply abnormality detector 16 monitors the voltage of each power supply in the apparatus and generates an alarm signal S17 when the power supply is abnormal. Reference numeral 17 is a power-off request device, which generates a power-off request signal S18 when the apparatus is powered off.

Next, the operation of the above embodiment will be described. First, in the power-on sequence, set the power switch 1 to A
When connected to the C power source, a DC voltage is generated by the DC power supply device 2, and the DC power is supplied to the oscillator 3, the counter 4, the nonvolatile memory 5, the relay driver 6, and the AND circuit 15, respectively.

After the power is turned on, the oscillator 3 starts oscillating and outputs the clock S6, whereby the counter 4 starts counting and gives an address to the non-volatile memory 5. The relay driver 6 drives the relay control lines S12, S13, S14, S15 for controlling the relays 7, 8, 9, 10 according to a sequence programmed in advance in the non-volatile memory 5 as the counter 4 counts up. AC power sources S2, S for the devices 11, 12, 13, 14 connected to
3, S4 and S5 are respectively connected / disconnected.

When the count number programmed in the non-volatile memory 5 in advance is reached, the non-volatile memory 5 generates a power-on sequence end signal S16, the AND circuit 15 generates a counter end request signal S19, and the counter 4
Stops counting and ends the power-on sequence.

Here, the timing of the power-on sequence will be described with reference to the timing chart of FIG. In FIG. 2, a clock S6 is a signal generated by the oscillator 3 of FIG. 1, and is a memory address 1 (S7) and a memory address 2 (S7).
8), memory address 3 (S9), memory address 4 (S10),
The memory address 5 (S11) is a signal generated by the counter 4 of FIG. Using this signal as an address, the output signals of the non-volatile memory 5 according to a preprogrammed sequence are relay control lines 1 (S12), 2 (S13), 3 (S14),
4 (S15).

When the relay control line 1 (S12) rises from 0 to 1, the relay 7 of FIG. 1 is connected, the AC power is output to the separated AC power supply 1 (S2), and the AC power is supplied to the device 11. To be done. Below, each relay is connected at the rising timing of the relay control line, and the AC power supply 2 (S
3), 3 (S4), 4 (S5) are supplied.

Relay control lines 1 (S12), 2 in FIG.
The generation sequence of (S13), 3 (S14), 4 (S15) is programmed in the non-volatile memory 5. This makes it possible to create a power-on sequence at an arbitrary timing.

Next, in the power-off sequence, when the alarm signal S17 or the power-off request signal S18 that detects an abnormal power supply is generated, the counter end request signal S19 is released and the counter 4 is restarted to start the power-off sequence. To do.

The counter 4 restarts counting and gives an address to the non-volatile memory 5. As the counter 4 counts up, the relay driver 6 disconnects the relays 7, 8, 9, 10 according to a sequence preprogrammed in the non-volatile memory 5 (S1).
2), 2 (S13), 3 (S14), 4 (S15) are driven to disconnect the AC power of the devices 11, 12, 13, 14 connected to the relay.

In the present embodiment, the number of relays is four and the counter output is five bits, but it can be set arbitrarily according to the capacity of the nonvolatile memory.

[0021]

As described above, the power supply control device of the present invention can generate a power-on and power-off sequence by a program in the non-volatile memory. This has the effect of being able to create an arbitrary sequence with high precision and high resolution.

Further, according to the present invention, by exchanging the non-volatile memory, it is possible to flexibly cope with a system having a different sequence.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an exemplary embodiment of the present invention.

FIG. 2 is a timing diagram of the power-on sequence of FIG.

[Explanation of symbols]

1 ... Power switch, 2 ... DC power supply device, 3 ... Oscillator, 4 ... Counter, 5 ... Non-volatile memory, 6 ...
Relay driver, 7, 8, 9, 10 ... Relay, 11, 1
2, 13, 14 ... Equipment, 15 ... AND circuit, 16 ... Power failure detector, 17 ... Power shutdown requester.

Claims (1)

[Claims] 1. An oscillator that starts oscillating at the same time when the main power of the device is turned on, a counter that counts by a signal oscillated by the oscillator, and a signal that is generated by the counter as an address. And a non-volatile memory programmed to generate a power-off sequence signal, a plurality of relays corresponding to each device for connecting / disconnecting power according to the sequence signal generated by the non-volatile memory, and the non-volatile memory. A power supply control device comprising a relay driver for driving the generated sequence signal so as to generate a sequence of power-on and power-off of each device.