JP2003263248A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To greatly improve stability in operation when connecting a battery of a power supply device by starting operation thereof aside from an unstable region at the start of operation in the power supply device. <P>SOLUTION: The power supply device is provided with a power supply 1 consisting of a detachable battery, a boosting means 2 with the power supply 1 as an input, an equipment control means 3 that is driven by the output of the boosting means 2, and a voltage detection means 7 for detecting a specified voltage with the power supply 1 as a direct input and transmitting the results to the equipment control means 3. The equipment control means 3 determines that the output obtained by the voltage detection means 7 is a normal logical output for more than a fixed time in succession when mounting the power supply 1, and subsequently controls the equipment. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for equipment used by boosting the voltage of a removable power source such as a dry battery.

[0002]

2. Description of the Related Art In recent years, the size of equipment has been reduced, and equipment used by boosting dry batteries and rechargeable batteries has been widely used. Devices used under load are increasing.

An example of the above-described conventional power supply device will be described below with reference to the drawings. FIG. 4 is a block diagram of a device using a conventional power supply device, and FIG. 5 is a timing chart showing a temporal voltage change of each part when a power supply such as a dry battery is connected to the conventional power supply device.

In FIG. 4, 11 is a power source such as a dry battery, and 1
2 is a booster such as a DD circuit. Reference numeral 13 is a device control means driven by the output of the boosting means 12, which is an IC
A microcomputer or the like is used to realize the functions of a recorder or the like. Reference numeral 14 is a voltage detecting means for detecting the output voltage of the boosting means 12, and is for resetting the device controlling means 13. Reference numeral 15 is an output decoupling capacitor of the boosting means 12. Reference numeral 16 is a flash memory which is controlled by the device control means 13 and which records and reproduces voice data and the like.

The operation of the power supply device configured as described above will be described below mainly with reference to FIG.
First, in FIG. 5, Vin is the voltage of the connected power supply 11, and generally, voltage fluctuation occurs in a region where connection is unstable due to chattering when the power supply battery is mounted. The region is shown in the figure as occurring after the elapse of T1 time.
Vout is the output voltage of the boosting means 12, rises with a slight delay from Vin, and supplies a constant voltage to the device control means 13. Further, in the chattering region of the power source 11, the output voltage of Vout greatly changes due to the load of the device control means 13. VDet1 is an output voltage of the voltage detection means 14 having a threshold value at a voltage higher than the operation lower limit voltage of the device control means 13, and it has the same potential as Vout above the specified voltage and overlaps Vout in FIG. But Vou
When t becomes the specified voltage or less, the output voltage VDet1 is "L".
The output is performed (two-dot chain line part), and the device control means 13 is reset.

That is, the above-mentioned power source 1 as shown in FIG.
The operation in the chattering area is as follows. After T1 has elapsed since the power supply 1 was connected, the battery 1 was momentarily dislocated twice in the chattering region in FIG.
At this time, the output voltage Vout of the boosting means 2 operates in accordance with the control of the device control means 13 at that time.
Voltage fluctuations occur depending on the load. In FIG. 5, the voltage detection means 14 detects the fluctuation of Vout due to the first power failure.
Goes to L, and the device control means 13 is reset.

[0007]

However, in the conventional power supply device as described above, when the heavy loads overlap during chattering when the power supply is connected, the reset operation is repeated, or when the reset voltage is at the limit, another flash device is used. There is a problem that a read error may occur in a memory or the like, and in an extreme case, if the above variation occurs during writing of the flash memory, the recorded data may be lost or destroyed.

In view of the above-mentioned conventional problems, the present invention has been made for the purpose of providing a power supply device capable of stably operating a device even if chattering occurs when a power source such as a battery is connected. is there.

[0009]

In order to solve the above-mentioned problems, a power supply device of the present invention is driven by a power supply composed of a removable battery, a boosting means having the power supply as an input, and an output of the boosting means. And a voltage detecting means for directly detecting the specified voltage by directly inputting the power source and transmitting the result to the equipment controlling means.The equipment controlling means is configured to operate by the voltage detecting means when the power source is mounted. It is configured such that it is determined that the output is the specified logic output continuously for a certain time or longer, and then the device is controlled.

As a result, when the power supply is attached, the device control means determines that the output of the voltage detection means is the specified logic output continuously for a certain period of time or longer, so that chattering occurs when the power supply battery is connected. Also makes it possible to operate the device stably.

Further, according to the present invention, a power source comprising a removable battery, a boosting means having the power source as an input, a device control means driven by an output of the boosting means, and an output voltage of the boosting means are detected. A first voltage detecting means for resetting the device control means when a predetermined voltage is reached, and a second voltage detecting means for directly inputting the power source to detect a specified voltage and transmitting the result to the device control means. The device control means defines a predetermined voltage by the first voltage detection means at the time of mounting the power source and resets and starts the output, and then the output by the second voltage detection means is regulated continuously for a predetermined time or longer. It is configured to determine that it is a logic output and then control the device. The voltage required for the operating voltage of the device control means is detected by the first voltage detection means, and at the same time, the By detecting by direct second voltage detecting means for variation of the voltage, it becomes possible to perform more stable control.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a power supply device of the present invention will be described in detail below with reference to FIGS. FIG. 1 shows a block diagram using a power supply device, and FIG. 2 is a timing chart showing a temporal voltage change of each part when a power supply such as a dry battery is connected to the power supply device.

In FIG. 1, reference numeral 1 is a power source such as a dry battery, and 2 is a boosting means such as a DD circuit. 3 is a device control means driven by the output of the boosting means 2, which uses a microcomputer or the like to realize the functions of an IC recorder or the like. Reference numeral 4 is a first voltage detecting means for detecting the output voltage of the boosting means 2, and is for resetting the device controlling means 3. Reference numeral 5 is an output decoupling capacitor of the boosting means 3. Reference numeral 6 is a flash memory which is controlled by the device control means 3 and which records and reproduces voice data and the like. Reference numeral 7 designates a second voltage detecting means for directly inputting the power source 1 to detect the voltage thereof. The second voltage detecting means 7 detects whether the power source voltage is equal to or higher than a prescribed voltage, and in response to the detection, the voltage converting means 8 is used. The information of the voltage fluctuation is transmitted to the device control means 3. here,
The voltage conversion means 8 converts the voltage of the device control means 3 into an operable voltage according to the output of the second voltage detection means 7, and the voltage is supplied from the boosting means 2.

The operation of the power supply device configured as described above will be described below with reference to FIG.

First, in FIG. 2, Vin is the voltage of the connected power supply 1, and generally, voltage fluctuation occurs in a region where connection is unstable due to chattering during mounting. The area is shown in FIG. 2 as occurring after the elapse of T1 time. Vout is an output voltage of the boosting means 2, rises with a little delay from the power supply voltage Vin, and supplies a constant voltage to the device control means 3 and the flash memory 6.
Here, the constant voltage supplied to the device control means 3 and the flash memory 6 is a voltage equal to or higher than the voltage Vth1, and the device control means 3 and the flash memory 6 can operate at the voltage Vth1 or higher. Vth1 is detected by the first voltage detecting means 4. In addition, the power source 1
In the chattering area of V, due to the load of the device control means 3, V
The output voltage (thick line) of out fluctuates greatly.

VDet2 monitors the power supply voltage of the dry battery or the like and has a threshold voltage above the usable lower limit of a single battery, and here the threshold voltage is Vth2.
By detecting the threshold voltage Vth2 by the second voltage detecting means 7, in the chattering region, the output at the same timing as the chattering time of the power supply 1 is input to the device control means 3 as "H" or "L". (Dotted line). This voltage also normally has the same potential as Vout, and the normal waveforms overlap. Where VD
The timing of inputting "H" or "L" of et2 is "L" due to chattering after the initial "H" when the power supply battery is connected, and then the next "H" is short in T2 time. It becomes "L" again, and the next "H" means that the specified voltage has continued for a certain time T3 or more.

Next, the internal control flow of the device control means 3 after the reset start will be described with reference to FIG. First, when the power supply battery is connected and the output voltage Vout of the boosting means 2 is detected by the first voltage detecting means 4 to be a predetermined voltage, the output voltage VDte1 of the first voltage detecting means 4 is detected. As a result, the device control means 3 is reset and started.

At this start, in step S1, the logic output of the second voltage detecting means 7 is read, and if "H", the process proceeds to step S2. When the output of the second voltage detecting means 7 is "L" in step 1, the process proceeds to step S3, the time count is cleared, and the process returns to step S1 again. In step S2, the time counter is incremented by 1, and the process proceeds to step S4. In step S4, the specified time (“T3” in FIG. 2)
If the time is less than the prescribed time, the process returns to step S1 to continue counting. When the specified time has elapsed in step S4, the process proceeds to step S5, and the device control means 3 starts the operation as a normal device control means.

Here, the specified time "T3" is set as the time required for mounting the power supply battery on the equipment and stabilizing the connection, and this time is the shape of the battery terminal of the equipment and the battery. It depends on the size, shape, etc., and is determined as the specified time unique to each device according to the characteristics of each device.

In this way, the device control means 3 first detects the power supply 1 when the reset operation is started by the first voltage detection means 4 to boost the voltage required for the operation of the device control means 3. After confirming that the output of the second voltage detecting means 7 continues the predetermined voltage for the specified time (T3) or more (that is, "T1" and "T" shorter than "T3").
2) is ignored), and device control is started, which allows the operation to be started by removing the region where the operation may become unstable due to the chattering of the battery 1. Become.

As described above, according to this embodiment, the operational stability of the power supply device when the battery is connected can be greatly improved.

[0022]

As described above, according to the present invention, the power source composed of a removable battery, the boosting means having the power source as an input, the device control means driven by the output of the boosting means, and the power source are directly connected. Voltage detection means for detecting a specified voltage as an input and transmitting the result to the device control means, wherein the device control means is such that when the power supply is mounted, the output from the voltage detection means continues for a specified period of time or more. Since it is configured to control the equipment after determining that it is an output, it is possible to start the operation by removing the unstable region at the time of starting the operation of the power supply device. It is possible to greatly improve the operational stability.

Further, a power source composed of a removable battery, a boosting means having the power source as an input, a device control means driven by an output of the boosting means, and an output voltage of the boosting means are detected to obtain a predetermined voltage. And a second voltage detecting means for resetting the device control means when the temperature reaches a predetermined voltage, and a second voltage detecting means for directly inputting the power source to detect a specified voltage and transmitting the result to the device control means. In the device control means, after the predetermined voltage is detected by the first voltage detection means when the power supply is attached and the device is reset-started, the output from the second voltage detection means is a specified logic output continuously for a fixed time or longer. It is determined that the device is controlled and then the device is controlled to detect the voltage required for the operating voltage of the device control means by the first voltage detection means, and change the power supply voltage. For by detecting by direct second voltage detecting means, is capable of performing a more stable control.

[Brief description of drawings]

FIG. 1 is a block diagram of a power supply device according to an embodiment of the present invention.

FIG. 2 is a timing chart when the battery is connected.

FIG. 3 is an internal control flowchart of the device control means.

FIG. 4 is a block diagram of a conventional power supply device.

FIG. 5 is a timing chart when the battery is connected.

[Explanation of symbols]

1 power supply 2 boosting means 3 Equipment control means 4 First voltage detection means 7 Second voltage detection means

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02M 3/155 G06F 1/00 333D F term (reference) 5B011 DA06 DB05 GG04 HH03 5G003 BA01 DA02 DA16 EA06 GB03 GC04 5H410 BB04 CC02 DD02 EB01 FF03 FF22 FF25 KK01 5H730 AS01 BB02 BB14 FD01 FD11 FG01 XC02

Claims (2)

[Claims] 1. A power source comprising a removable battery, a boosting means having the power source as an input, a device control means driven by the output of the boosting means, and a prescribed voltage which is directly inputted to the power source and detects a specified voltage. Voltage detection means for transmitting the result to the device control means, the device control means, when the power supply is installed, determines that the output by the voltage detection means is a specified logic output continuously for a certain period or more, After that, the power supply device is configured to control the device. 2. A power source comprising a removable battery, a boosting means having the power source as an input, a device control means driven by the output of the boosting means, and an output voltage of the boosting means for detecting a predetermined voltage. And a second voltage detection means for resetting the device control means when the temperature reaches a predetermined level, and a second voltage detection means for directly inputting the power source to detect a specified voltage and transmitting the result to the device control means. In the device control means, after the predetermined voltage is detected by the first voltage detection means when the power supply is attached and the device is reset-started, the output from the second voltage detection means is a specified logic output continuously for a fixed time or longer. A power supply device characterized in that the power supply device is configured to determine that and then control the device.