JP2008167542A - Power supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device supplying multiple pieces of electronic equipment of different types with power corresponding to the characteristics, such as rated voltage, of each type. <P>SOLUTION: The power supply device supplies electronic equipment with a rated voltage controlled at an AC adapter as an AC-DC power supply. The power supply device includes: an ID chip module that is connected to the electronic equipment and stores data on voltage and the like specific to the electronic equipment; a control module that is connected to the AC adapter and outputs a signal for controlling voltage and the like according to data in the ID chip module; and a means for electrically coupling the ID chip module and the control module. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power supply device for electronic devices such as personal computers, PDAs (electronic notebooks), digital cameras, mobile phones, etc., which can be used by directly connecting to all devices even if the rated voltage is different. is there.

Generally, an AC adapter as an AC-DC power supply for an electronic device is either built in the electronic device or externally attached.
As shown in FIG. 7, the AC power cord 23 of the AC adapter 21 is connected to the AC bus 22 by inserting the AC plug 11 into the AC outlet 22 inside the wall portion 51 and connected to the AC bus 52 as shown in FIG. The cord 24 is connected to the electronic device 20. The AC adapter 21 generally includes a filter 25, a rectification / smoothing circuit 26, and a power conversion circuit 27.

Among such power supply apparatuses, a power supply apparatus for use in a plurality of devices having different rated voltages such as a personal computer, a PDA (electronic notebook), a digital camera, and a mobile phone is known (Patent Document 1).
As shown in FIG. 8, the power supply device 10 includes an AC plug 11 connected to the input side of the switching regulator unit 12, and a plurality of sets of DC-DC converter units 13 a having different output voltages on the output side of the switching regulator unit 12. 13b, output control units 14a and 14b, and jacks 15a and 15b are sequentially connected, and the reference voltage is supplied from the output setting operation unit 17 to the DC-DC converter units 13a and 13b via the control unit 16 in accordance with the rated voltage of the electronic device. Vra and Vrb are supplied, a predetermined output voltage is obtained from the output control units 14a and 14b, and supplied to the target electronic device through the jacks 15a and 15b.

In addition, a power supply information unit configured independently to hold power supply information such as a voltage value, a current value, and a polarity of a DC power supply is built in the electronic device, and predetermined power is supplied according to the power supply information read from the power supply information unit. Power supply adapter that selectively forms a DC power supply having a voltage value and a current value with an AC / DC converter (Patent Document 2), and an AC adapter according to the operating voltage of the electronic device sent from the voltage information generation circuit in the electronic device The DC voltage is set with the power supply device that turns on the switch and supplies it to the load when the set voltage matches the working voltage (Patent Document 3), and obtains information on the rated voltage and rated power from the RFID tag transponder of the electronic device If the information does not exceed the power capacity of the power supply device, a power supply device (Patent Document 4) that adjusts the DC voltage and supplies it to the electronic device is described.
JP 2001-161070 A JP-A-8-182191 JP 2001-245476 A JP 2005-151772 A

In the conventional power supply device 10 shown in FIG. 8 (Patent Document 1), if the electronic device 20 connected to the jack 15 is different, the output setting operation unit 17 must be operated for output setting each time. Not only is it bothersome, but if an operation error occurs, the electronic device 20 itself may fail or be destroyed. In addition, there are many types of recent electronic devices, and there are cases where the rated voltage cannot be set due to slight differences.
If a relatively approximate voltage that is not the rated voltage is supplied, the built-in lithium battery may not be charged at an appropriate voltage, and may fail. For this reason, usually, a method is adopted in which the DC voltage of the AC adapter and the plug shape of the DC cord are made different depending on the model of the electronic device.

However, this is not only a limitation, but it is not very convenient for the user to know which AC adapter 21 belongs to which electronic device 20 because preparing the AC adapter 21 for each electronic device. Many are in a disposable state.
Further, when the AC adapter 21 is provided for each electronic device 20, the AC adapter 21 has to be inexpensive, and there is a problem in output accuracy.
Furthermore, not only the rated voltage of the electronic device 20 but also the current corresponding to the capacity is not an AC adapter 21 as an appropriate AC-DC power supply, the electronic device 20 may not operate properly or the AC adapter 21 may be damaged. There is a fear.
In addition, it is necessary to supply power to the electronic device 20 according to characteristics, such as providing a protection function for overcurrent, overvoltage, short circuit protection, and the like of the electronic device 20.

  In the power supply devices shown in Patent Documents 2, 3 and 4, the power supply device converts the voltage into a corresponding voltage based on information from a power supply information circuit or the like built in the electronic device and supplies it to the electronic device. Since the power supply information circuit and the like built in the electronic device are circuits unique to the electronic device, there is a problem that the power supply information circuit cannot be used other than the electronic device having the built-in power supply information circuit.

A first object of the present invention is to provide a power supply device capable of supplying power corresponding to a rated voltage for each model and other characteristics to a plurality of types of electronic devices with a single power supply device. It is.
The second object of the present invention is to supply power to all electronic devices using a common ID chip storing information corresponding to the rated voltage for each model and other characteristics in a plurality of types of electronic devices. It is to provide a power supply device that can be used.

The power supply device according to claim 1 is:
In a power supply apparatus configured to supply a rated voltage controlled by an AC adapter as an AC-DC power supply to an electronic device,
An ID chip module which is connected to the electronic device side and stores data such as voltage specific to the electronic device;
A control module connected to the AC adapter side and outputting a signal for controlling a voltage or the like based on data of the ID chip module;
A means for electrically coupling the ID chip module and the control module is provided.

The power supply device according to claim 2 is:
The ID chip module includes a device information memory for storing data such as a voltage unique to the electronic device and a driver circuit for sending data recorded in the device information memory to the control module in response to a command from the control module.

The power supply device according to claim 3 is:
The device information memory is characterized by comprising data that is rewritten in advance and stored in data specific to the electronic device that supplies the rated voltage.

The power supply device according to claim 4 is:
The device information memory stores data unique to a plurality of types of electronic devices in advance, and when the ID chip module is connected to the electronic device, selects corresponding data using a signal representing the ID of the electronic device as an address. It is characterized by being made possible.

The power supply device according to claim 5 is:
The controller module has an ID chip module, a power supply unit that drives the controller module, a serial data conversion unit that captures device data from the ID chip module, a parallel data conversion unit that converts serial data into parallel data, and a power supply device-specific based on this data And a power signal controller for outputting a control signal such as a voltage and a clock signal generator for calling data from the ID chip module.

The power supply device according to claim 6 is:
Means for electrically coupling the ID chip module and the control module includes a device rated voltage terminal, a 3V terminal, a data terminal, a clock terminal, a load terminal, and a ground terminal.

The power supply device according to claim 7 is:
The AC adapter includes a filter, a rectifying / smoothing circuit, a power conversion circuit, and a PWM controller. The controller module data is input to the PWM controller, and the output of the power conversion circuit is controlled by the output of the PWM controller. It is characterized by that.

The power supply device according to claim 8 is:
A power factor correction circuit is inserted in front of the AC adapter.

The power supply device according to claim 9 is:
The electronic apparatus includes a battery, a main board, a switch circuit for controlling contact and separation between the battery and the main board, and a main switch circuit for controlling contact and separation between the AC adapter and the main board. The circuit and the main switch circuit are controlled to connect the AC adapter and / or the battery to the main board.

The present invention has the following effects.
(1) Even if the connected electronic devices are different, there is no need to operate the output change setting, the operation is extremely simple, there is no mistake in operation, and there is no failure or destruction of the electronic device. In addition, there are many types of electronic equipment, and the rated voltage can be set accurately with slight differences.
(2) There is no need to change the DC voltage of the AC adapter and the plug shape of the DC cord depending on the electronic device model.
(3) An AC adapter can be used as an AC-DC power supply in which not only the rated voltage of the electronic device but also the current according to the capacity is appropriate, and the electronic device operates properly.
(4) It is easy to supply power according to characteristics, such as providing an electronic device with a protection function for overcurrent, overvoltage, short circuit protection, etc. of the electronic device.

(5) With a single power supply device, it is possible to supply power corresponding to the rated voltage and other characteristics for each model to a plurality of types of electronic devices.
(6) A power supply device capable of supplying power to all electronic devices using a common ID chip storing information corresponding to the rated voltage for each model and other characteristics in a plurality of types of electronic devices. Can be provided.

The power supply device according to the present invention includes:
In a power supply apparatus configured to supply a rated voltage controlled by an AC adapter as an AC-DC power supply to an electronic device,
An ID chip module which is connected to the electronic device side and stores data such as voltage specific to the electronic device;
A control module connected to the AC adapter side and outputting a signal for controlling a voltage or the like based on data of the ID chip module;
Means for electrically coupling the ID chip module and the control module.
The ID chip module includes a device information memory for storing data such as a voltage unique to an electronic device and a driver circuit for sending data recorded in the device information memory to a control module in response to a command from the control module.
The device information memory may be configured by previously rewriting and storing data unique to an electronic device that supplies a rated voltage, and the device information memory is data unique to a plurality of models of electronic devices. Can be stored in advance, and when the ID chip module is connected to the electronic device, the corresponding data can be selected using a signal representing the ID of the electronic device as an address. .

A first embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 32 denotes an ID chip set. The ID chip set 32 includes an ID chip module 28, a controller module 29, a DC connector pin 30 for connecting them, and a connector socket 31.
The ID chip module 28 includes a device information memory 39 and a driver 40. The internal device information memory 39 includes a number of electronic devices 20a, 20b, 20c, such as a personal computer, a PDA, a digital camera, and a mobile phone. All the unique information 20d,... Is stored. Specific information includes rated voltage, rated current, accuracy, protection function (overvoltage, overcurrent, short circuit protection, etc.), and other information.

In order to store information unique to each electronic device in the device information memory 39 inside the ID chip module 28, the following two methods are conceivable.
(1) A method of rewriting and storing only data unique to an electronic device in advance in the device information memory 39 and connecting the ID chip module 28 to the electronic device 20.
(2) Data unique to electronic devices of all types is stored in advance in the device information memory 39 including a lookup table, and when the ID chip module 28 is connected to the electronic device 20, the ID of the electronic device 20 is stored. A method of automatically selecting corresponding data by using some signal to represent as an address.

  The controller module 29 is for reading the data of the ID chip module 28, and is connected to the output end of the AC adapter 21 as an AC-DC power source. The AC adapter 21 as the AC-DC power source includes a desktop type 21a, an AC adapter type 21b, a DC outlet type 21c,.

  The controller module 29 includes an ID chip module 28, a 3V power supply unit 45 that drives the controller module 29, a serial data conversion unit 43 that takes in device data from the ID chip module 28, and a parallel data conversion unit 42 that converts serial data into parallel data. And a power supply controller 41 that outputs a voltage, current, protection function and the like specific to the power supply device based on this data, and a clock signal generator 44 for data call.

  As shown in FIGS. 2A and 2B, the connector socket 31 on the controller module 29 side and the ID chip set 32 on the ID chip module 28 side are a device rated voltage terminal 33, a 3V terminal 34, a data terminal 35, a clock. A terminal 36, a load terminal 37, and a ground terminal 38 are provided.

As shown in FIG. 3, the AC adapter 21 serving as the AC-DC power source includes an AC plug 11, a filter 25, a rectifying / smoothing circuit 26, a power conversion circuit 27 such as a DC / DC step-down converter, a PWM controller 46, and a current detection. A controller module 29 is connected to the PWM controller 46.
The electronic device 20 includes a rechargeable battery 49 such as a lithium ion battery, and is further connected to the ID chip module 28.
The electronic device 20 and the AC adapter 21 are coupled by a connector socket 31 and a connector pin 30.

The operation of the above configuration will be described separately in two cases.
(1) A case where only data unique to an electronic device is rewritten and stored in advance in the device information memory 39 and the ID chip module 28 is connected to the electronic device 20.
When connecting the AC adapter 21 to the electronic device 20, information specific to the electronic device 20 to be used, specifically, a specific power supply voltage of the electronic device 20, and other control purposes are previously connected to the ID chip module 28. Is rewritten and recorded in the device information memory 39 by external input.

ＲＥＡＤ ＭＯＤＥ ：本体、ＩＤチップ２８から必要電圧、必要電力、ＯＮ／ＯＦＦ信号などを読み取る。
ＷＲＩＴＥ ＭＯＤＥ：ＡＣアダプタ２１の供給電力、保護回路動作の有無などの送信。
ＴＥＳＴ ＭＯＤＥ ：ＤＩＡＧなどの自己診断を行うモード。
ＲＯＭ ＭＯＤＥ ：内部のＲＯＭにデータを書き込む際のモード。 An ID chip module 28 is attached to the electronic device 20, a controller module 29 is attached to the AC adapter 21, and a connector socket 31 and a connector pin 30 are coupled between them.
Then, 3V module drive power is supplied from the 3V power supply 45 of the controller module 29 to the ID chip module 28, and the driver circuit 40 is driven. In the device information memory 39, a unique ID of the electronic device 20 is stored in advance.
A clock signal of about several hundreds KHz to 1 MHz shown in FIG. 4A is sent from the clock signal generator 44 of the controller module 29 to the driver circuit 40, and the ID information of the electronic device is read from the device information memory 39, and the connector pin 30 and the connector socket 31, for example, data specific to various electronic devices as shown in FIG.
The relationship between data and function is as follows.

READ MODE: Reads necessary voltage, necessary power, ON / OFF signal, etc. from the main body and ID chip 28.
WRITE MODE: Transmission of the power supplied to the AC adapter 21 and the presence / absence of protection circuit operation.
TEST MODE: A mode for self-diagnosis such as DIAG.
ROM MODE: Mode for writing data to the internal ROM.

Information input from the ID chip module 28 to the controller module 29 is sent to the power supply controller 41 through the serial data conversion unit 43 and the parallel data conversion unit 42, and the voltage, current, and other data are supplied from the power supply controller 41 to the PWM controller 46. Sent to. A PWM output signal corresponding to the electronic device 20 connected from the PWM controller 46 is output as a command such as voltage, and a rated voltage is obtained by the power conversion circuit 27, and the connector socket 31, device rated voltage terminal 33, connector pin 30. Through this, appropriate electric power is supplied to the electronic device 20, for example, a load such as a CPU, a monitor, a CD, and an FDD. Further, the current value detected by the current detection unit 47 and the voltage value on the output side of the current detection unit 47 are fed back to the PWM controller 46 to confirm whether the output is proper.
Furthermore, as shown in FIG. 3, when a rated voltage is supplied from the AC adapter 21 to the electronic device 20, the battery 49 is simultaneously charged.

(2) Data unique to electronic devices of all types is stored in advance in the device information memory 39 including a lookup table, and when the ID chip module 28 is connected to the electronic device 20, the ID of the electronic device 20 is stored. When the corresponding data is automatically selected using some signal to represent as an address.
When connecting the AC adapter 21 to the electronic device 20, the device information memory 39 stores all the unique electronic devices 20a, 20b, 20c, 20d,..., Such as personal computers, PDAs, digital cameras, and mobile phones. An ID chip module 28 in which information is stored in advance in the device information memory 39 before use is used.

An ID chip module 28 is attached to the electronic device 20, a controller module 29 is attached to the AC adapter 21, and a connector socket 31 and a connector pin 30 are coupled between them.
Then, 3V module drive power is supplied from the 3V power supply 45 of the controller module 29 to the ID chip module 28, and the driver circuit 40 is driven. Further, a clock signal of about several hundreds KHz to 1 MHz shown in FIG. 4A is sent from the clock signal generator 44 of the controller module 29 to the driver circuit 40, and a unique ID of the electronic device 20 is sent to the device information memory 39. A signal is input as an address, and specific information from the data in the device information memory 39, specifically, a specific power supply voltage of the electronic device 20 and other control data, for example, as shown in FIG. Data specific to various electronic devices as shown is automatically selected and sent to the controller module 29 via the connector pin 30 and the connector socket 31.
The relationship between data and function and the operation of the AC adapter 21 are as described above.

  When the AC adapter 21 is connected to another electronic device 20 from among a large number of electronic devices 20a, 20b, 20c, 20d,... Of different models, each of the various information stored in the ID chip module 28 is unique. Since the information is output, it is converted into a rated voltage corresponding to the electronic device 20 and supplied in the same manner as described above.

FIG. 5 shows an example in which the AC adapter 21 is embedded in the wall 51 and the DC connector pin 30 on the electronic device 20 side is connected to the DC connector socket 31 on the wall surface.
With such a DC outlet, unlike conventional AC outlets, there is no rectification loss and energy efficiency is improved. In addition, since the AC rectifying / smoothing circuit is not required, the size and cost of the device are reduced.
In FIG. 5, the power factor improvement circuit 50 is interposed between the AC adapter 21 and the AC bus 52, so that the current power factor of 0.5 to 0.6 can be made close to 1.

In the embodiment shown in FIG. 3, when the rated voltage is supplied from the AC adapter 21 to the electronic device 20, the battery 49 is also charged at the same time. However, in the example shown in FIG. 6, the switch circuit 54 is provided before the battery 49. The charge control unit 53 controls the switch circuit 54.
With this configuration,
(1) The output of the AC adapter 21 as the AC-DC power supply when the battery 49 is charged can be optimized by detecting the current flowing through the switch circuit 54 with the charge control unit 53 and controlling the on / off of the charge current. it can.
(2) It is possible to save power by controlling on / off of the switch circuit 54 and the main switch circuit 56. For example, when the main switch circuit 56 is connected to supply all from the AC adapter 21 when the AC adapter 21 has a sufficient margin, the main switch is configured to supply all from the battery 49 when the AC adapter 21 does not have enough margin. When the circuit 56 is connected, the main switch circuit 56 may be connected so as to be supplied from both the AC adapter 21 and the battery 49.
(3) The optimum voltage of the AC adapter 21 as an AC-DC power supply for the operation of the main board 55 can be output. By the same operation as the above (2).
(4) When the device side is off and the battery 49 is 100% charged, the current consumption can be reduced to 0 by turning off the AC adapter 21 as the AC-DC power supply.

1 is a block diagram of a basic configuration showing an embodiment of a power supply device according to the present invention. It is a detailed block diagram which shows an example of the ID chip set in FIG. It is a specific block diagram of an AC adapter as an AC-DC power supply of the present invention. FIG. 3 is a waveform diagram of data reading of the ID chip set in FIG. 2. It is the block diagram which couple | bonded the power supply device of this invention with the DC outlet in a wall part. It is a block diagram which shows the example which controls on / off of the switch circuit of a battery, and the main switch circuit by the side of an apparatus. It is explanatory drawing of the AC adapter 7721 as a conventional AC-DC power supply. It is a block diagram which shows the other example of the conventional power supply device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Power supply device, 11 ... AC plug, 12 ... Switching regulator part, 13 ... DC-DC converter part, 14 ... Output control part, 15 ... Jack, 16 ... Control part, 17 ... Output setting operation part, 18 ... Display part , 20 ... electronic equipment, 21 ... AC adapter as an AC-DC power supply, 22 ... AC outlet, 23 ... AC power cord, 24 ... DC cord, 25 ... filter, 26 ... rectifier / smoothing circuit, 27 ... power conversion circuit 28 ... ID chip module, 29 ... controller module, 30 ... connector pin, 31 ... connector socket, 32 ... ID chip set, 33 ... device rated voltage terminal, 34 ... 3V terminal, 35 ... data terminal, 36 ... clock terminal, 37 ... Load terminal, 38 ... Ground terminal, 39 ... Device information memory, 40 ... Driver circuit, 41 ... Power supply controller 42 ... Parallel data conversion unit 43 ... Serial data conversion unit 44 ... Clock signal generation unit 45 ... 3V power supply unit 46 ... PWM controller 47 ... Current detection unit 48 ... Operational amplifier 49 ... Battery 50 ... Power factor correction circuit 51... Wall part 52... AC bus 53. Charge control part 54. Switch circuit 55.

Claims (9)

In a power supply apparatus configured to supply a rated voltage controlled by an AC adapter as an AC-DC power supply to an electronic device,
An ID chip module which is connected to the electronic device side and stores data such as voltage specific to the electronic device;
A control module connected to the AC adapter side and outputting a signal for controlling a voltage or the like based on data of the ID chip module;
A power supply apparatus comprising: means for electrically coupling the ID chip module and the control module.   The ID chip module includes a device information memory for storing data such as a voltage unique to an electronic device and a driver circuit for sending data recorded in the device information memory to the control module in response to a command from the control module. Item 1. The power supply device according to Item 1.   3. The power supply apparatus according to claim 2, wherein the device information memory is obtained by rewriting and storing data unique to an electronic device that supplies a rated voltage in advance.   The device information memory stores data unique to a plurality of types of electronic devices in advance, and when the ID chip module is connected to the electronic device, selects corresponding data using a signal representing the ID of the electronic device as an address. The power supply device according to claim 2, wherein the power supply device is made possible. The controller module has an ID chip module, a power supply unit that drives the controller module, a serial data conversion unit that captures device data from the ID chip module, a parallel data conversion unit that converts serial data into parallel data, and a power supply device-specific based on this data 5. The power supply apparatus according to claim 1, further comprising: a power supply controller that outputs a control signal such as a voltage and a clock signal generator for calling data from the ID chip module.   2. The power supply device according to claim 1, wherein the means for electrically coupling the ID chip module and the control module comprises a device rated voltage terminal, a 3V terminal, a data terminal, a clock terminal, a load terminal, and a ground terminal.   The AC adapter includes a filter, a rectifying / smoothing circuit, a power conversion circuit, and a PWM controller. The controller module data is input to the PWM controller, and the output of the power conversion circuit is controlled by the output of the PWM controller. The power supply device according to claim 1, 2 or 5.   8. The power supply apparatus according to claim 1, wherein a power factor correction circuit is inserted in front of the AC adapter.   The electronic apparatus includes a battery, a main board, a switch circuit for controlling contact and separation between the battery and the main board, and a main switch circuit for controlling contact and separation between the AC adapter and the main board. 9. The power supply apparatus according to claim 1, wherein the AC adapter and / or the battery is connected to the main board by controlling the circuit and the main switch circuit.

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