WO2004019193A1 - バスパワー装置および電源制御方法 - Google Patents
バスパワー装置および電源制御方法 Download PDFInfo
- Publication number
- WO2004019193A1 WO2004019193A1 PCT/JP2003/003836 JP0303836W WO2004019193A1 WO 2004019193 A1 WO2004019193 A1 WO 2004019193A1 JP 0303836 W JP0303836 W JP 0303836W WO 2004019193 A1 WO2004019193 A1 WO 2004019193A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- current
- voltage
- power
- bus
- charging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
Definitions
- the present invention relates to a bus power device conforming to an interface standard such as USB (Universal Serial Bus) and IEEE (Institute of Electronic and Electronics Engineers) 1394, and in particular, to avoid inoperability due to voltage drop.
- the present invention relates to a bus power device and a power supply control method capable of ascertaining a remaining battery level according to an operation state, and performing quick charging.
- USB interface standard has attracted attention as an interface for connecting peripheral devices to personal computers.
- This USB interface standard has the feature that up to 127 USB devices can be connected in a tree.
- FIG. 7 is a block diagram showing a configuration of a conventional bus power device 20.
- a USB compatible device 10 is a personal computer that complies with the USB interface standard described above, and has a high-power USB port 11.
- the hub 13 has a low-power USB port 12 driven by bus power.
- the high-power USB port 11 is a port that can supply high power to which the USB connector (USB connector 30 in the figure) is connected.
- It has a function to supply a rated power of 5W (50 OmA / 5 V) to USB devices (the bus-powered device 20 in the figure).
- the low-power USB port 12 is a low-power port to which the USB connector is connected.In addition to functioning as a data input / output port, it also has a rated power of 0.5 W (100 mA / 5 V). It has a function to supply to B equipment. However, Roper (I) A USB device connected to the USB port 12 is a self-powered device that is not driven by a low power of 0.5 W, and is driven by receiving power from another power source.
- the bus-powered device 20 is a hard disk drive device as one of the USB devices, and is supplied from the USB-compatible device 10 via a USB connector 30 connected to the high-power USB port 11. Driven by power (2.5 W (500 mA / 5 V)).
- the USB connector 30 is a connector conforming to the USB interface standard, and is connected to the high power USB port 11 when the bus power device 20 is used.
- the USB connector 30 is connected to a bus power line 31, a data line 32, a GND (ground) line, a shield line, and the like for supplying power to each unit.
- the USB B / ATA (USB / AT Attachment) conversion unit 21 converts the data of the USB interface standard input via the data line 32 into the data of the AT A interface standard, and converts the data via the ATA interface 22. Output to the hard disk 23.
- the hard disk 23 is a large-capacity recording medium, and data is read / written while being rotated by electric power supplied via a bus power line 31.
- the USBZATA conversion unit 21 converts ATA interface standard data read from the hard disk 23 and input via the ATA interface 22 into USB interface standard data, and outputs the data to the data line 32. Has functions.
- the voltage adjustment unit 24 adjusts the 5 V voltage supplied from the bus power line 31 to a 3.3 V voltage, and supplies the 3.3 V voltage to the US BZATA conversion unit 21.
- the operation of the bus power device 20 will be described with reference to the flowchart shown in FIG.
- the USB connector 30 is connected to the high-level USB port 11 and becomes a plug-in.
- the bus power device 20 is recognized as a device by the USB compatible device 10.
- step SA3 it is determined whether or not the USB connector 30 has been connected to the high-power USB port 11, and in this case, the determination result is “Yes”.
- step SA4 high power (500mA / 5V) from the USB compatible device 10 side is supplied to the voltage adjusting unit 24 and the hard disk 23 via the bus power line 31.
- step SA5 the 3.3 V voltage from the voltage adjustment unit 24 is supplied to the USB / ATA conversion unit 21, and the USB / ATA conversion unit 21 starts operating and the hard disk 23 also starts operating. .
- step SA 3 if the result of the determination in step SA 3 is “No”, that is, if the USB connector 30 is connected to the low-power USB port 12, the USB-compatible device 10 transmits Since only low power (100 mA / 5 V) is supplied to each part of the power supply, the bus power device 20 cannot be used in step SA6.
- FIG. 9 is a block diagram showing a configuration of a conventional bus power device 40 using the current assist method.
- parts corresponding to the respective parts in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted.
- the current detection unit 42 detects a current flowing through the bus power line 31.
- the MPU (Micro Processing Unit) 43 controls the current assist based on the current detection result from the current detector 42, the function to control the charging of the secondary battery 41, and the power supply to the hard disk 23. It has a control function, a function of controlling the display of the remaining battery level, a function of monitoring the status of the USB / ATA conversion unit 21, and the like.
- the hard disk switch 44 is interposed between the bus line 31 and the hard disk 23, and has a function of turning on and off the power supply to the hard disk 23 under the control of the MPU 43.
- the charging unit 45 is interposed between the bus power line 31 and the secondary battery 41, and has a function of charging the current flowing through the bus power line 31 to the secondary battery 41 under the control of the MPU 43.
- the current assist unit 46 is interposed between the secondary battery 41 and the bus power line 31. Under the control of the MPU 43, when a current exceeding a predetermined value flows through the bus power line 31, It has a function of performing current assistance of supplying power from the secondary battery 41 to the bus power line 31.
- the battery remaining amount display unit 47 displays the battery remaining amount of the secondary battery 41 by lighting / flashing an LED (Light Emitting Diode). Specifically, when the battery voltage of the secondary battery 41 exceeds the threshold, the LED is turned on, and the user is notified that the remaining battery capacity is sufficient. On the other hand, when the battery voltage of the secondary battery 41 falls below the threshold, the LED blinks, and the user is notified that the remaining battery level is low.
- LED Light Emitting Diode
- the bus power device 40 is recognized as a device by the USB-compatible device 10.
- the high power ( ⁇ ⁇ ⁇ ) from the USB compatible device 10 side is increased.
- the power is supplied to each unit via the bus power line 31, and each unit is activated. Specifically, the 3.3 V voltage from the voltage adjustment unit 24 is supplied to the USB / ATA conversion unit 21 and the USBZATA conversion unit 21 starts operating.
- the hard disk power switch 44 is turned on under the control of the MPU 43, power is supplied from the bus power line 31 to the hard disk 23, and the hard disk 23 starts operating. At this time, an inrush current flows through the bus power line 31 due to the influence of the initial rotation of the hard disk 23, and when the current exceeds a predetermined value, current assist is performed. That is, the MPU 43 determines that the current detection result from the current detection unit 42 is a predetermined value! If it exceeds, the current assist unit 46 is instructed to perform current assist.
- the current assist unit 46 discharges the secondary battery 41 and supplies a current from the secondary battery 41 to the bus power line 31.
- the current detection result by the current detection unit 42 decreases by the amount of the current from the secondary battery 41, and thus falls below a predetermined value.
- the current assist unit 46 When the current detection result of the current detection unit 42 is equal to or smaller than a predetermined value, the current assist unit 46 does not need the current assist, and thus the MPU 43 outputs a charging pulse to the charging unit 45.
- FIG. 10 is a block diagram showing a configuration of a conventional bus power device 50. In this figure, parts corresponding to the respective parts in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.
- the bus power device 50 shown in FIG. 1 is a device which is driven by receiving high power power from another power source when the USB connector 30 is connected to the low power USB port 12.
- a DC jack 51 and a switch 52 are newly provided.
- the DC jack 51 is a terminal for connecting an AC / DC (Alternating Current / Direct Current) adapter (not shown) as a separate power supply.
- the DC jack 51 is connected to the bus power line 31 via the switch 52.
- An AC / DC adapter is an adapter that converts AC to DC and generates DC voltage / current.
- the switch 52 has a function of switching the connection destination of the bus power line 31 to either the USB connector 30 or the DC jack 51.
- step SB 1 shown in FIG. High power (50 OmA / 5 V) from the / DC adapter is supplied to each unit via the DC jack 51, the switch 52, and the bus power line 31, and each unit is activated.
- the 3.3 V voltage from the voltage adjusting unit 24 is supplied to the USB / ATA conversion unit 21 and the USB / ATA conversion unit 21 starts operating.
- the hard disk power switch 44 is turned on under the control of the MPU 43, power is supplied to the hard disk 23 from the bus power line 31 and the hard disk 23 is turned on.
- step SB2 when the USB connector 30 is connected to the low-power USB port 12 and plugged in, in step SB3, the bus-powered device 50 is recognized as a device by the USB-compatible device 10. In step SB4, the bus power device 50 starts operating.
- the current flowing through the bus power line 31 is detected by the current detection unit 42, and when the current exceeds a predetermined value, the secondary battery 41 A current assist system that assists current is adopted Has been stated.
- the above voltage drop is 0.25 V. If it exceeds, the voltage supplied to the hard disk 23 becomes less than 4.75 (5-0.25) V, which is the operation guarantee voltage, and the hard disk 23 stops operating.
- the current assist method of the bus power device 40 since only the current flowing through the bus power line 31 is to be detected, there is a problem that inoperability due to a voltage drop cannot be avoided.
- the load (battery voltage) of the secondary battery 41 fluctuates according to the operation state (charging, access to the hard disk 23, data transfer) of the bus power device 40. Nevertheless, since the battery voltage of the secondary battery 41 is compared with the threshold value of one third, and based on the result of the comparison, the remaining battery level is displayed on the remaining battery level display section 47. There was a problem that it was not possible to accurately determine the remaining battery level. Further, in the conventional bus power device 40, since the charging current from the charging unit 45 to the secondary battery 41 is constant, even when charging in a short time is required, rapid charging can be performed. There was a problem that could not be done. .
- the present invention provides a bus power device and a power control method capable of avoiding inoperability due to a voltage drop, grasping a remaining battery level according to an operation state, and performing quick charging. It is an object. Disclosure of the invention The present invention relates to a connector connected to a port of a higher-level device corresponding to a predetermined interface standard, and a current / voltage detector for detecting a current voltage supplied from the higher-level device to the bus power line via the port and the connector. Means for assisting a current to the bus power line based on a comparison result between the current detection result and the current threshold value in the current / voltage detection means, and a comparison result between the voltage detection result and the voltage threshold value. And a power assisting means for assisting a shortage voltage to the bus power line based on the information.
- the current and voltage supplied from the host device to the bus power line via the port and the connector are detected, and the current is supplied to the bus power line based on the result of comparison between the current detection result, the current threshold, and the value. And assisting the bus power line with insufficient voltage based on the comparison between the voltage detection result and the voltage threshold value. It is possible to avoid operation failure due to BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a block diagram showing a configuration of a first embodiment according to the present invention.
- FIG. 2 is a diagram showing a configuration of a battery remaining amount display section 120 shown in FIG.
- FIG. 3 is a flowchart illustrating the power assisting operation of the bus power device 100 shown in FIG. 1
- FIG. 4 is a flowchart illustrating the charging operation of the bus power device 100 shown in FIG.
- Fig. 5 is a block diagram showing a configuration of a second embodiment according to the present invention.
- Fig. 6 is a charging operation of the bus power device 200 shown in Fig. 5.
- FIG. 7 is a block diagram showing the configuration of a conventional bus power device 20.
- FIG. 8 explains the operation of the bus power device 20 shown in FIG. FIG.
- FIG. 9 is a block diagram showing the configuration of a conventional bus power device 40
- FIG. 10 is a block diagram showing the configuration of a conventional bus power device 50
- FIG. 11 is a flowchart illustrating the operation of the bus power device 50 shown in FIG. is there.
- FIG. 1 is a block diagram showing a configuration of a first embodiment according to the present invention.
- parts corresponding to the respective parts in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.
- a bus power unit 100 is provided instead of the bus power device 40 shown in FIG.
- the bus-powered device 100 is a hard disk drive device as one of the USB devices, and is connected to the USB compatible device 10 via the USB connector 150 connected to the high-power USB port 11 or an AC / DC It is driven by high power (2.5W (50 OmA / 5V)) supplied from the adapter 111.
- the USB connector 150 is a connector that conforms to the USB interface standard, and is connected to the high-power USB port 11 when the bus power device 100 is normally used.
- the bus power device 100 can be operated by the secondary battery 105.
- the USB connector 150 is connected to a bus power line 151 for supplying power to each part, a data line 152, a GND (ground) line, a shield line, and the like.
- the USB / ATA conversion unit 101 converts the data of the USB interface standard input via the data line 152 into the data of the ATA interface standard, and converts the data to the hard line via the ATA interface 102. It has a function to output to the disk 103.
- the hard disk 103 is a large-capacity recording medium.
- the hard disk 103 is rotationally driven by electric power supplied via the bus power line 151, and data is read / written therein. You.
- the USBZATA conversion unit 101 converts data of the ATA interface standard read from the hard disk 103 and input via the ATA interface 102 into data of the USB interface standard, and converts the data to data. It has a function to output to line 152.
- DC DC converter 104 converts the 5 V voltage supplied from bus power line 151 to a 3.3 V voltage, and supplies the 3.3 V voltage to US BZATA conversion section 101.
- the secondary battery 105 is a lithium-ion battery, an alkaline battery, a nickel cadmium battery, or the like that can repeatedly charge and discharge Z.
- the secondary battery 105 functions as a main power supply when the USB connector 150 is connected to the low-power USB port 12 and an AC / DC adapter 111 described later is not connected. To supply power.
- the battery voltage (rated value) of this secondary battery 105 is 4.2 to 3V.
- the DCZDC converter 106 has a function of boosting the battery voltage of the secondary battery 105 to 5 V.
- the current / voltage detector 107 detects the current flowing through the bus power line 151 and also detects the voltage of the bus power line 151.
- the current / voltage detector 107 detects the current as a current threshold (for example, 100 mA, 500 mA). ),
- the power assist unit 108 provides a current assist to supply the excess current from the secondary battery 105 (AC / DC adapter 1 11 described later) to the bus power line 151. ing.
- the current / voltage detection unit 107 When the voltage detection result is lower than the voltage threshold (for example, 4.75 V), the current / voltage detection unit 107 outputs the DCZDC converter 106 (secondary battery 105) or the AC / DC adapter 111 described later. Voltage supply to the bus power line 151 to increase the voltage of the bus power line 151. It has a function to be performed in 08.
- the power assist unit 108 has a function of assisting power by using both the current assist and the voltage assist described above.
- the hard disk power switch 109 is interposed between the bus power line 151 and the hard disk 103, and has a function of turning on and off the power supply to the hard disk 103.
- the DC jack 110 is a terminal for connecting the ACZDC adapter 111 as a separate power supply.
- the DC jack 110 is connected to the power assist unit 108 and the like.
- the AC / DC adapter 1 1 1 is an adapter for converting alternating current into direct current and generating a direct current voltage Z current.
- the charging timing selection unit 112 has a function of selecting the timing of charging the secondary battery 105.
- the charging mode selection section 1 1 3 selects the fast charging mode when the AC / DC adapter 1 1 1 is connected to the DC jack 1 110, and the ACZ DC adapter 1 1 1 If the is not connected, select the normal charging mode. In the rapid charging mode, the charging current is larger than in the normal charging mode, so the charging time from the start of charging to full charging is shortened, enabling rapid charging.
- the charging control unit 114 controls charging of the secondary battery 105 based on the charging timing from the charging timing selection unit 112 and the charging mode from the charging mode selection unit 113.
- the charge control unit 114 includes a normal charge mode in which charging is performed with a first charging current, and a rapid charging mode in which charging is rapidly performed with a second charging current (> first charging current). There is.
- the battery remaining amount display section 120 changes the voltage threshold and the value in three steps according to the operation state of the bus power device 100, and compares the voltage threshold value with the battery voltage of the secondary battery 105. Displays the remaining battery level based on.
- FIG. 2 is a diagram showing a configuration of the battery remaining amount display section 120 shown in FIG.
- the blue LED 122, the green LED 122, and the orange LED 123 are the secondary batteries 100 in the following three operating states (1) to (3) of the bus power device 100.
- 5 is an LED for displaying the remaining battery power in each color (blue, green, orange).
- access status (hereinafter referred to as access status)
- the switching element 124, the switching element 125, and the switching element 126 are provided in parallel in correspondence with the blue LED 121, the green LED 122, and the orange LED 123.
- the switching element 124 is turned on / off by a charging signal indicating that the bus power device 100 is in the charging state of (1) above, and the charging signal is input from the charging control unit 114 (see FIG. 1). It is turned on in the case.
- the switching element 125 is turned on / off by an access signal indicating that the bus power device 100 is in the access state described in (2) above, and an access signal is input from the ATA interface 102 (see FIG. 1). Turned on when
- the switching element 126 is on / off controlled by a data transfer signal indicating that the bus power device 100 is in the data transfer state described in (3) above, and a data transfer signal is input from the ATA interface 102 (see FIG. 1). It is turned on when it is turned on.
- a resistor 127 and a resistor 128 are interposed between the secondary battery 105 and the switching element 124. Also, a resistor 127 and a resistor 129 are connected to the secondary battery 105. In the figure, the voltage of the resistor 129 is the battery voltage VB of the secondary battery 105. One end of the resistor 130 is connected to the switching element 125.
- the threshold voltage VT is compared with the battery voltage VB, the threshold voltage VT 2 (comb threshold voltage VT ⁇ ), the teeth Threshold voltage VT 3 (The threshold voltage VT. This is a voltage dividing resistor for generating a three-step threshold voltage (when the tuning element 126 is on). A voltage of 3.3 V is applied to these resistors 131, 132, 133 and 134.
- the comparator 135 compares the battery voltage VB with the threshold voltage. When the battery voltage VB exceeds the threshold voltage V, the comparator 135 turns on the blue LED 121 via the resistor 138, and outputs a full charge signal. Output to the hard disk power switch 109 (see Fig. 1).
- the comparator 136 compares the a threshold voltage VT 2 battery voltage VB, if the battery voltage VB exceeds the threshold voltage VT 2, via the resistor 139 to turn on the green LED 1 22.
- the comparator 137 compares the battery voltage VB and the threshold voltage VT 3, when the battery voltage VB falls below the threshold voltage VT 3, through a resistor 140 to turn on the orange LED 123.
- FIG. 3 is a flowchart illustrating a power assist operation of the bus power device 100 shown in FIG.
- FIG. 4 is a flowchart illustrating a charging operation of the bus power device 100.
- the USB connector 150 is connected to the high-power USB port 11, and when the plug-in is established, a low-power (10 OmA / 5 V) is connected from the USB-compatible device 10 to the bus power line 151. Is supplied to each part via The current / voltage of the bus power line 151 is detected by the current / voltage detection unit 107.
- the low power (100 mA / 5 V) is changed from the high power USB port 11 to the bus power from the plug-in until the USB device 10 recognizes the bus power device 100.
- High power (500mAZ5V) is supplied to the bus power device 100 from the high power USB port 11 after recognition.
- step SC5 current / voltage detection section 107 instructs power assist section 108 to perform current assist.
- the power assist unit 108 supplies the power of the DCZDC converter 106 (secondary battery 105) to the bus power line 151.
- the current detection result by the current / voltage detection unit 107 decreases by the amount of the current from the DC / DC converter 106 (secondary battery 105), so that the current detection result becomes equal to or less than the current threshold value (10 OmA). .
- power assist unit 108 supplies the voltage from DC / DC converter 106 (secondary battery 105) to bus power line 151.
- step SC6 high power (50 OmA / 5 V) from the USB compatible device 1 ° is supplied to each unit via the bus line 151, and the hard disk 103 is powered on.
- the 3.3 V voltage from the DCZDC converter 104 is supplied to the USBZA TA converter 101, and the 38 / eighth converter 101 starts operating. Also, when the hard disk power switch 109 is turned on by the 38-to-8 converter 101, power is supplied to the hard disk 103 from the bus power line 151, and the hard disk 103 starts operating.
- step SC7 it is determined whether the USB connector 150 is connected to the high power USB port 11 or not. In this case, the determination result is “Yes”.
- step SC8 current / voltage detection section 107 instructs power assist section 108 to provide a current assist.
- power assist unit 108 supplies the current from DC / DC converter 106 (secondary battery 105) to bus power line 151.
- the current threshold value 50 OmA
- the current / voltage detection unit 107 sets the determination result of step SC9 to “Yes”.
- current Z voltage detecting section 107 instructs power assist section 108 to perform a voltage assist.
- power assist unit 108 supplies the voltage from DCZDC converter 106 (secondary battery 105) to bus power line 151.
- step SC7 When the USB connector 150 is connected to the low power USB port 12, the result of the determination in step SC7 is “No”. In this case, low power (100 mA / 5 V) is supplied from the USB-compatible device 10 to each unit via the bus power line 151.
- the power assist unit 108 is connected to the ACZDC adapter 111. Operable power is supplied to the bus line 151 via the bus line 151.
- the USB connector 150 when the USB connector 150 is connected to the low-power USB port 12 and the AC / DC adapter 1 11 is not connected to the DC jack 110, the rechargeable battery 105 discharges and the DC / DC converter 106 Operable power is supplied to the bus power line 151 via the power assist unit 108.
- step SC12 current / voltage detection section 107 instructs power assist section 108 to perform current assist in the same manner as the operation described above.
- step SC11 current / voltage detection section 107 instructs power assist section 108 to perform voltage assist in the same manner as the operation described above.
- step SD 1 the USB connector 150 is connected to the high-power USB port 11 (or mouth power USB port 12) and becomes a plug-in. It is determined whether the battery voltage of the secondary battery 105 is less than 4.2 V (full charge). In this case, assuming that the determination result of step SD 2 is “Yes”, in step SD 3, the charging mode selection unit 113 sets the power of the AC / DC adapter 111 connected to the DC jack 110. Determine whether or not.
- step SD6 the charging mode selection unit 113 selects the normal charging mode.
- step SD7 the charging timing selection unit 112 determines whether or not the hard disk 103 is being accessed, that is, whether or not the current consumption is large due to the access.
- step SD 7 If the determination result of step SD 7 is “No”, the charging timing selection section 1 12 issues a charge instruction to the charge control unit 114.In step SD8, the charge control unit 114 performs the first charge in accordance with the normal charge mode selected by the charge mode selection unit 113. The current is supplied to the secondary battery 105 to perform normal charging. The first charging current is supplied from the USB-compatible device 10 to the bus power line 151 and is a part of the current flowing through the bus power line 151.
- step SD7 if the determination result of step SD7 is “Yes”, a charging stop instruction is issued from the charging timing selection unit 112 to the charging control unit 114, and in step SD9, the charging control unit 114 Stop charging the secondary battery 105.
- step SD3 when the AC / DC adapter 111 is connected to the DC jack 110, the result of the determination in step SD3 is “Yes”.
- step SD4 the charge mode selection unit 113 selects the quick charge mode.
- step SD5 the charging control unit 114 supplies the second charging current (> the first charging current) to the secondary battery 105 in response to the above-described quick charging mode, and executes the quick charging. . If the determination result in step SD2 is "No", charging is stopped in step SD9.
- This second charging current is supplied from both the USB-compatible device 10 and the ACZDC adapter 111 to the bus power line 151, and is a part of the current flowing through the bus power line 151. Greater than the current. Therefore, the quick charge can bring the secondary battery 105 to a fully charged state in a shorter time than the normal charge.
- FIG. 2 when a charging signal is input from the charging control unit 114 (see FIG. 1) to the switching element 124 while the secondary battery 105 is being charged, the switching element 124 is turned on, Since the resistor 128 is connected in parallel with the resistor 129, the battery voltage VB changes.
- the comparator 135 turns on the blue LED 121 and sends a full charge signal indicating that the secondary battery 105 is fully charged to the hard disk power switch 109. (See Fig. 1) Power. The user recognizes that the rechargeable battery 105 is fully charged by the lighting of the blue LED 121.
- the switching element 125 When an access signal is input from the ATA interface 102 (see FIG. 1) to the switching element 125 in the access state described above, the switching element 125 is turned on, and the resistor 130 is connected in parallel with the resistor 133 and the resistor 134. You. At this time, the threshold voltage VT 2 is lower than the threshold voltage VT. Here, the battery voltage VB exceeds the threshold voltage VT 2, comparator 136 turns on the green LE D 122.
- the current supplied to the bus power line from the USB-compatible device 10 via the high-power USB port 11 (or the low-power USB port 12) and the USB connector 150 The current / voltage detection unit 107 detects the voltage, and the power assist unit 108 assists the current to the bus power line 151 based on the result of the comparison between the current detection result and the current threshold value. And the voltage threshold ⁇ (Based on the result of comparison with the direct voltage, it was decided to assist the insufficient voltage to the bus power line 151, so the overload of the USB compatible device 10 due to the increase in current and the operation due to the voltage drop Disability can be avoided.
- the voltage drop between USB-compatible device 10 and bus power line 151 is compensated for. Since the power assist unit 108 assists this voltage to the bus power line 151, it is possible to avoid inoperability due to a voltage drop caused by the cable length or contact resistance.
- AC power as a separate power supply is connected to bus power line 151.
- the ZDC adapter 111 When the ZDC adapter 111 is not connected, the secondary battery 105 is charged normally with the first charging current, and when the AC / DC adapter 111 is connected, Since the secondary battery 105 is rapidly charged with the second charging current which is large, the need for quick charging to complete the charging in a short time can be satisfied.
- the secondary battery 1 0 5 supplies power to each part via the bus power line 15 1 as the main power supply, so even if there is no AC / DC adapter 1 1 1 low power USB port 1 2 bus power device 100 can be operated.
- the threshold voltage V, the threshold voltage VT and the threshold voltage V T are gradually increased according to the operation state (charge state, access state, data transfer state) of each part. 2, to set the threshold voltage VT 3, based on a comparison result between the battery voltage VB and the threshold voltage of the rechargeable battery 1 05, the battery remaining amount according to the operation status blue L ED 1 2 1, green LED 122 and orange LED 123 are displayed so that the remaining battery level according to the operating status can be ascertained.
- the configuration example in which the secondary battery 105 is rapidly charged has been described.
- the power supply to each unit is stopped or the function is stopped.
- it may be configured to perform forced charging in which charging of the rechargeable battery 105 is given top priority by stopping the battery.
- this configuration example will be described as a second embodiment.
- FIG. 5 is a block diagram showing a configuration of a second exemplary embodiment according to the present invention.
- parts corresponding to the respective parts in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.
- a forced charging switch 201 is newly provided, and instead of the charging control unit 114 shown in FIG.
- a charge control unit 202 is provided.
- the forced charging switch 201 is a switch for performing the above-described forced charging, and is operated by a user.
- the charge control unit 202 has a function of performing normal charge and rapid charge in the charge control unit 114 (see FIG. 1) and a function of performing forced charge when the forced charge switch 201 is turned on. ing.
- step SE1 shown in the figure the USB connector 150 is connected to the high power USB port 11 and plugged in.
- step S E2 charging control section 202 determines whether or not forced charging switch 201 is turned on. If the result of this determination is “No”, the normal or rapid charging of the secondary battery 105 is performed after step SD2 shown in FIG.
- step SE3 the USB / ATA conversion unit 101 stops the conversion operation because the reset signal is input because the forced charging switch 201 is turned on. As a result, power consumption in the USB / ATA conversion unit 101 is reduced.
- step SE4 the USB ATA conversion unit 101 outputs an off signal to the hard disk power switch 109. Thereby, the hard disk power switch 109 is turned off, and the power supply to the hard disk 1 • 3 is stopped.
- step SE5 the charging control unit 202 determines whether or not the battery voltage of the secondary battery 105 is less than 4.2V (fully charged). In this case, the result of the determination is “Yes”.
- step SE6 the charging control unit 202 supplies the third charging current to the secondary battery 105 in accordance with the forced charging mode from the forced charging switch 201, and executes the forced charging.
- This third charging current is applied to the USB-enabled device 10 (AC / DC adapter).
- the current is supplied from the power supply 11 1) to the bus power line 15 1 and flows through the bus power line 15 1.
- the reduced power consumption of the USB / ATA conversion unit 1 and the power stoppage of the hard disk 103 are used for the forcible charging of the secondary battery 105 as the third charging current. . Therefore, in the normal charging, the rapid charging, and the above-described forced charging of the first embodiment, the secondary battery 105 is fully charged in the shortest time of the forced charging. Then, when the determination result of step SE5 becomes "Yes" due to the forced charging, in step SE7, the charging control unit 202 stops charging the secondary battery 105. As described above, according to the second embodiment, the power supply to the loads (the hard disk 103, the USB / ATA conversion unit 101, etc.) connected to the bus power line 151 is stopped (reduced). ), And forced charging is performed, and the secondary battery 105 is forcibly charged with the third charging current that is larger than the second charging current. Can meet your needs.
- the specific configuration example is not limited to these first and second embodiments and does not depart from the gist of the present invention. Even a change in the design of the range is included in the present invention.
- a current Z voltage supplied to a bus power line from a host device via a port and a connector is detected, and based on a comparison result between the current detection result and the current threshold value.
- the current is assisted to the bus power line, and the insufficient voltage is assisted to the bus power line based on the result of the comparison between the voltage detection result and the voltage threshold. This has the effect that overloading and inoperability due to voltage drop can be avoided.
- the present invention when the voltage detection result is less than the voltage threshold, a voltage for compensating for a voltage drop between the host device and the bus power line is assisted to the bus power line. Therefore, it is possible to avoid an inoperability due to a voltage drop caused by a cable length or a contact resistance.
- the present invention when another power supply is not connected to the bus power line, Since the secondary battery is normally charged with the first charging current, and when another power supply is connected, the secondary battery is rapidly charged with the second charging current larger than the first charging current. However, there is an effect that it is possible to satisfy the need for quick charging, which is to complete charging in a short time.
- the power supply to the load connected to the bus power line is stopped to instruct forced charging, and the secondary battery is forcibly charged with the third charging current larger than the second charging current. Therefore, if charging is to be completed in a shorter time, the need for forced charging can be satisfied.
- the threshold voltage is set stepwise according to the operation state of each unit, and the remaining battery according to the operation state is determined based on the comparison result between the battery of the secondary battery and the threshold voltage. Since the battery level is displayed, it is possible to determine the remaining battery level according to the operating state.
- the bus power device and the power control method according to the present invention are suitable for interface standards such as USB and IEEE1394 as interfaces for connecting peripheral devices to a personal computer.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Power Sources (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03715514A EP1553480A4 (en) | 2002-08-21 | 2003-03-27 | BUS POWER SUPPLY AND BUS POWER SUPPLY METHOD |
| US11/023,298 US7421594B2 (en) | 2002-08-21 | 2004-12-27 | Bus power device and power-source control method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002240477A JP4153262B2 (ja) | 2002-08-21 | 2002-08-21 | バスパワー装置 |
| JP2002-240477 | 2002-08-21 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/023,298 Continuation US7421594B2 (en) | 2002-08-21 | 2004-12-27 | Bus power device and power-source control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004019193A1 true WO2004019193A1 (ja) | 2004-03-04 |
Family
ID=31943935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2003/003836 Ceased WO2004019193A1 (ja) | 2002-08-21 | 2003-03-27 | バスパワー装置および電源制御方法 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1553480A4 (ja) |
| JP (1) | JP4153262B2 (ja) |
| KR (1) | KR100622970B1 (ja) |
| CN (1) | CN1327310C (ja) |
| WO (1) | WO2004019193A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371902C (zh) * | 2004-04-02 | 2008-02-27 | 纬创资通股份有限公司 | 电源负载模拟装置及测试方法 |
Families Citing this family (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445929C (zh) * | 2006-02-10 | 2008-12-24 | 建碁股份有限公司 | 可减少扩充子板上复数个电压输出端口相互干扰的电源系统 |
| EP2069880B1 (en) * | 2006-09-26 | 2013-12-04 | Nokia Corporation | Method and device for activating functions of a powered-off device via a serial data bus interface |
| CN101169668B (zh) * | 2006-10-24 | 2010-09-29 | 达方电子股份有限公司 | 通用序列总线稳压装置及其稳压方法 |
| US20080102765A1 (en) * | 2006-10-29 | 2008-05-01 | Sony Ericsson Mobile Communications Ab | Wireless Adaptor Power Control |
| CN101370110B (zh) * | 2007-08-13 | 2011-06-15 | 晨星半导体股份有限公司 | 用在高清晰度多媒体接口的电源控制装置与方法 |
| KR100936274B1 (ko) * | 2008-06-18 | 2010-01-13 | 충남대학교산학협력단 | 전원선 통신이 가능한 usb 인터페이스 |
| KR100972526B1 (ko) * | 2008-06-20 | 2010-07-28 | 주식회사 씨모텍 | Usb 장치를 위한 전원 공급 장치 및 방법 |
| JP2010009538A (ja) * | 2008-06-30 | 2010-01-14 | Toshiba Corp | 情報処理装置 |
| TR200808536A2 (tr) | 2008-11-11 | 2010-06-21 | Vestel Elektronik Sanayi ve Ticaret A.Ş | Usb çıkış voltajının kompanse edilmesi yöntemi |
| JP2010154692A (ja) * | 2008-12-25 | 2010-07-08 | Nikon Corp | 電子機器における充電装置、電子機器及び充電方法 |
| US8145800B2 (en) | 2008-12-31 | 2012-03-27 | Fresenius Medical Card Holdings, Inc. | Identifying when a USB self-powered device is connected to a medical device by triggering an alert about a potential risk to patient |
| US8135876B2 (en) | 2008-12-31 | 2012-03-13 | Fresenius Medical Care Holdings, Inc. | Identifying when a USB self-powered device is connected to a medical device by triggering an alert about a potential risk to patient |
| JP4643726B2 (ja) * | 2009-05-26 | 2011-03-02 | 株式会社東芝 | 情報処理装置及び電力供給方法 |
| US9030166B2 (en) | 2009-07-03 | 2015-05-12 | Nikon Corporation | Electronic device, and method controlling electronic power supply |
| JP5056805B2 (ja) * | 2009-07-03 | 2012-10-24 | 株式会社ニコン | 電子機器、供給電力制御方法及びプログラム |
| US20110239008A1 (en) * | 2010-03-26 | 2011-09-29 | Lam Kean W | Power Adapter Having a Universal Serial Bus Hub |
| JP2011259625A (ja) * | 2010-06-09 | 2011-12-22 | Sony Corp | 情報処理装置及び電力供給制御方法 |
| CN102377202A (zh) * | 2010-08-26 | 2012-03-14 | 鸿富锦精密工业(深圳)有限公司 | 电源升压装置及具有该电源升压装置的电子系统 |
| US8850082B2 (en) * | 2010-08-30 | 2014-09-30 | Qualcomm Incorporated | Virtual USB compound device enumeration |
| CN102202117B (zh) * | 2011-04-22 | 2015-01-28 | 中兴通讯股份有限公司 | 一种具有usb接口的电子设备及其usb通信启动方法 |
| CA2922359C (en) * | 2011-06-15 | 2020-03-31 | Osram Sylvania Inc. | Systems and methods to detect bus network fault and topology |
| JP5880232B2 (ja) * | 2012-04-09 | 2016-03-08 | 三菱自動車工業株式会社 | 残量検出ユニット |
| JP5301008B1 (ja) | 2012-04-27 | 2013-09-25 | 株式会社東芝 | 電子機器、充電制御装置および充電制御方法 |
| CN102857719B (zh) * | 2012-09-12 | 2016-08-24 | 四川迪佳通电子有限公司 | 一种供电控制系统及方法 |
| KR101984076B1 (ko) | 2013-10-31 | 2019-05-31 | 주식회사 솔루엠 | 전원 공급 장치, 디바이스, 전원 공급 시스템 및 이의 제어 방법 |
| EP3159999B1 (en) * | 2014-07-16 | 2019-01-16 | Huawei Technologies Co., Ltd. | Electronic device quick charging method, apparatus and device |
| CN105807119A (zh) * | 2014-12-31 | 2016-07-27 | 鸿富锦精密工业(武汉)有限公司 | 电流检测装置 |
| EP3043442B1 (en) * | 2015-01-12 | 2024-12-04 | SIMPower Technology Inc. | Hub having complex power converters |
| US20160365853A1 (en) * | 2015-06-09 | 2016-12-15 | Magna Closures Inc. | Electromechanical switch via wiring connector |
| KR102169872B1 (ko) * | 2019-05-23 | 2020-10-27 | 주식회사 씨에스아이피 컨설팅 | 전원 공급 장치, 디바이스 및 전원 공급 시스템의 제어 방법 |
| KR102280374B1 (ko) * | 2019-05-23 | 2021-07-23 | 주식회사 씨에스아이피 컨설팅 | 전원 공급 장치 및 디바이스 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0717341A1 (en) * | 1994-12-15 | 1996-06-19 | International Business Machines Corporation | Power enabling apparatus and method |
| US5802379A (en) * | 1995-08-24 | 1998-09-01 | Norand Corporation | Battery depletion management in portable computing devices having PCMCIA card loading |
| EP0964360A1 (en) * | 1998-06-08 | 1999-12-15 | International Business Machines Corporation | Automatic data recovery of integrated circuit cards |
| JP2002091629A (ja) * | 2000-09-18 | 2002-03-29 | Toshiba Corp | 計算機システム |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6357011B2 (en) * | 1998-07-15 | 2002-03-12 | Gateway, Inc. | Bus-powered computer peripheral with supplement battery power to overcome bus-power limit |
| CN1303034A (zh) * | 1999-10-29 | 2001-07-11 | 上海伊迪艾电脑科技有限公司 | 高可靠性直流电源修补器 |
| US6373722B1 (en) * | 2000-06-05 | 2002-04-16 | International Business Machines Corporation | Power supply system for providing an auxiliary output voltage |
| US6252375B1 (en) * | 2000-07-24 | 2001-06-26 | In-System Design, Inc. | Power management system and current augmentation and battery charger method and apparatus for a computer peripheral |
-
2002
- 2002-08-21 JP JP2002240477A patent/JP4153262B2/ja not_active Expired - Fee Related
-
2003
- 2003-03-27 EP EP03715514A patent/EP1553480A4/en not_active Withdrawn
- 2003-03-27 CN CNB038175932A patent/CN1327310C/zh not_active Expired - Fee Related
- 2003-03-27 KR KR1020057002921A patent/KR100622970B1/ko not_active Expired - Fee Related
- 2003-03-27 WO PCT/JP2003/003836 patent/WO2004019193A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0717341A1 (en) * | 1994-12-15 | 1996-06-19 | International Business Machines Corporation | Power enabling apparatus and method |
| US5802379A (en) * | 1995-08-24 | 1998-09-01 | Norand Corporation | Battery depletion management in portable computing devices having PCMCIA card loading |
| EP0964360A1 (en) * | 1998-06-08 | 1999-12-15 | International Business Machines Corporation | Automatic data recovery of integrated circuit cards |
| JP2002091629A (ja) * | 2000-09-18 | 2002-03-29 | Toshiba Corp | 計算機システム |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1553480A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371902C (zh) * | 2004-04-02 | 2008-02-27 | 纬创资通股份有限公司 | 电源负载模拟装置及测试方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1327310C (zh) | 2007-07-18 |
| KR20050035888A (ko) | 2005-04-19 |
| KR100622970B1 (ko) | 2006-09-13 |
| JP2004078740A (ja) | 2004-03-11 |
| EP1553480A4 (en) | 2010-07-07 |
| CN1672116A (zh) | 2005-09-21 |
| JP4153262B2 (ja) | 2008-09-24 |
| EP1553480A1 (en) | 2005-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2004019193A1 (ja) | バスパワー装置および電源制御方法 | |
| US7421594B2 (en) | Bus power device and power-source control method | |
| CN103777730B (zh) | 电源管理电路及其方法 | |
| CN1326307C (zh) | 具有电池充电功能的直流电源单元 | |
| KR101226374B1 (ko) | 전력 어댑터, 컴퓨터, 장치 및 매개 장치 | |
| US8368252B2 (en) | High- and low-power power supply with standby power saving features | |
| US8149556B2 (en) | Power adapter and power supply method thereof | |
| JP3821635B2 (ja) | 電源供給装置、電気機器、および電源供給方法 | |
| TWI518511B (zh) | 用於從主機裝置供應電力至周邊裝置之設備、系統及方法 | |
| JP3540848B2 (ja) | 充電制御装置及び電子機器 | |
| CN103744815B (zh) | 中介电子装置、中介电子装置的操作方法及电子系统 | |
| JP4197189B2 (ja) | 電力供給のための回路および動作方法 | |
| US9092207B2 (en) | Circuit for supplementing electrical current to a peripheral device | |
| EP2383861A2 (en) | Battery charger for portable electronic equipment | |
| US20100289457A1 (en) | Energy efficient and fast charge modes of a rechargeable battery | |
| CN107431351B (zh) | 对快充usb充电器中的数据线的软短路过电压保护 | |
| CN104823348B (zh) | 充电设备 | |
| TWI685176B (zh) | 具有自電池模式轉換至適配器模式時保護適配器元件之轉換控制的電池充電系統,控制器和方法 | |
| EP2232643A1 (en) | Power adapter capable of communicating digitally with electronic devices | |
| CN101667739B (zh) | 电源装置及其放电方法 | |
| CN102801326B (zh) | 电源转接器及控制电源转接器运作于节能模式的方法 | |
| CN100481671C (zh) | 电池充电器 | |
| CN102299532A (zh) | 充电装置 | |
| US20050162017A1 (en) | Power supply device for peripheral device | |
| TWI684871B (zh) | 多埠usb快充電路 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN KR US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 11023298 Country of ref document: US |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2003715514 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 20038175932 Country of ref document: CN |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 1020057002921 Country of ref document: KR |
|
| WWP | Wipo information: published in national office |
Ref document number: 1020057002921 Country of ref document: KR |
|
| WWP | Wipo information: published in national office |
Ref document number: 2003715514 Country of ref document: EP |