WO2006049110A1 - 電源装置、及び携帯機器 - Google Patents
電源装置、及び携帯機器 Download PDFInfo
- Publication number
- WO2006049110A1 WO2006049110A1 PCT/JP2005/019954 JP2005019954W WO2006049110A1 WO 2006049110 A1 WO2006049110 A1 WO 2006049110A1 JP 2005019954 W JP2005019954 W JP 2005019954W WO 2006049110 A1 WO2006049110 A1 WO 2006049110A1
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- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- circuit
- power supply
- reference voltage
- output
- 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.)
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Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is DC
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices
- G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is DC using semiconductor devices in series with the load as final control devices characterised by the feedback circuit
Definitions
- the present invention relates to a power supply device that converts a power supply voltage from a DC power supply such as a battery into a predetermined output voltage and outputs the same, and a portable device incorporating the power supply device.
- a power supply such as a series regulator converts the power supply voltage from the DC power supply to a predetermined output voltage and outputs it. In this power supply, it is required to remove the ripple component and output a stable output voltage with respect to the ripple of the power supply voltage.
- ripple rejection the removal of the ripple component contained in the output voltage (hereinafter referred to as ripple rejection) depends largely on the stability of the reference voltage, so it is necessary to stabilize the reference voltage.
- This reference voltage is usually formed by a reference voltage generation circuit using a power supply voltage supplied to the power supply device. For this reason, it is difficult to perform sufficient rible rejection because the ripples are included in the reference voltage.
- a voltage adjustment circuit (hereinafter referred to as pre-power supply circuit) that outputs a stabilized power supply voltage is provided.
- the output voltage of the pre-power supply circuit is supplied as an operating voltage for operating the reference voltage generating circuit.
- Patent Document 1 Japanese Patent Laid-Open No. 2000-0183.
- providing a pre-power supply circuit increases the current consumption in the pre-power supply circuit.
- it is particularly required to reduce current consumption in order to extend the time that batteries can be used continuously. Therefore, It is not desirable to increase the current consumption by providing a re-power supply circuit.
- the output voltage of the pre-power supply circuit is somewhat lower than the power supply voltage.
- the power supply voltage capable of generating a predetermined reference voltage is limited to a higher voltage level than when a pre-power supply circuit is not used. That is, the power reduction characteristics as a power supply device deteriorate.
- the lower limit level in which the power supply voltage from the battery power source can be used is increased, and there is a problem that the usable time of the battery power source is shortened.
- an object of the present invention is to provide a power supply device that stabilizes the reference voltage without increasing current consumption and has improved ripple rejection characteristics, and a portable device including the power supply device. Disclosure of the invention
- the power supply apparatus of the present invention compares an output circuit that adjusts a power supply voltage and outputs a predetermined output voltage, a feedback voltage corresponding to the output voltage, and a reference voltage, and the feedback voltage based on the comparison result.
- An error amplifier circuit that controls the output circuit so that is equal to the reference voltage, and a reference voltage generation circuit that generates the reference voltage,
- the error amplification circuit and the reference voltage generation circuit are set in an operating state, and the output voltage is controlled to be output possible.
- the voltage of the control signal is an operating voltage of the reference voltage generation circuit.
- the power supply device of the present invention compares an output circuit that adjusts a power supply voltage and outputs a predetermined output voltage, a feedback voltage corresponding to the output voltage, and a reference voltage, and based on the comparison result, An error amplification circuit that controls the output circuit so that a feedback voltage is equal to the reference voltage; and a reference voltage generation circuit that generates the reference voltage; and at least the error amplification according to an operation command signal from the outside
- the reference voltage generation circuit uses the voltage of the operation command signal as an operation voltage, and is controlled to an operation state when the voltage level of the operation command signal exceeds a predetermined voltage level, and does not reach the predetermined voltage level. It is characterized in that it is controlled in a stopped state.
- a voltage level detection circuit for detecting whether the voltage level of the operation command signal exceeds the predetermined voltage level, and the reference voltage generation circuit and the error amplifier according to a detection result of the voltage level detection circuit; It is characterized in that the operation state or the stop state of is determined.
- the portable device of the present invention includes a battery power source that generates a power supply voltage
- An output circuit for adjusting the power supply voltage and outputting a predetermined output voltage is compared with a feedback voltage corresponding to the output voltage and a reference voltage, and the feedback voltage becomes equal to the reference voltage based on the comparison result.
- An error amplifier circuit for controlling the output circuit and a reference voltage generator circuit for generating the reference voltage as described above, and the error amplifier circuit and the reference voltage generator circuit are operated according to an external control signal. And controlling the output voltage to an output enabled state, and further using the voltage of the control signal as the operating voltage of the reference voltage generating circuit,
- the portable device of the present invention includes a battery power source that generates a power supply voltage
- An output circuit for adjusting the power supply voltage and outputting a predetermined output voltage is compared with a feedback voltage corresponding to the output voltage and a reference voltage, and the feedback voltage becomes equal to the reference voltage based on the comparison result.
- the reference voltage generation circuit uses the voltage of the operation command signal as an operation voltage, and the voltage level of the operation command signal is set to an operation voltage.
- a power supply that is controlled to an operating state when a predetermined voltage level is exceeded, and is controlled to be stopped when a predetermined voltage level is not reached;
- the portable device of the present invention includes a battery power source that generates a power supply voltage
- An output circuit for adjusting the power supply voltage and outputting a predetermined output voltage is compared with a feedback voltage corresponding to the output voltage and a reference voltage, and the feedback voltage becomes equal to the reference voltage based on the comparison result.
- the reference voltage generation circuit uses the voltage of the operation command signal as an operation voltage, and the voltage level of the operation command signal is a predetermined voltage. Is controlled to the operating state when exceeding level, the power supply device is controlled to the stopped state when not reach a predetermined voltage level,
- a smoothing circuit that smoothes the power supply voltage and outputs it as the operation command signal, and a load device to which the output voltage is supplied.
- a control signal such as an operation command signal to the power supply device is used as the operation voltage to the reference voltage generation circuit of the power supply device.
- the control signal such as the operation command signal is supplied from a control device including a computer or the power supply voltage is leveled. It is supplied after being smoothed by a smooth circuit. Therefore, the control signal has a small ripple component and is supplied at a stable voltage level. As a result, a stable reference voltage is generated from the reference voltage generation circuit, so that ripple resilience characteristics are improved.
- the battery can be used continuously for a longer time than the conventional one.
- control signal such as the operation command signal is used as the operating voltage to the reference voltage generation circuit in addition to the original use such as commanding the operation or stop of the power supply device, so the number of terminals is not increased. . Therefore, it is possible to reduce the number of terminals of the power supply device converted to IC.
- FIG. 1 is a configuration diagram of a power supply device and a portable device using the same according to a first embodiment of the present invention.
- FIG. 2 is a configuration diagram of a power supply device according to a second embodiment of the present invention and a portable device using the same.
- FIG. 3 is a configuration diagram of a power supply device according to a third embodiment of the present invention and a portable device using the same.
- Embodiments of a power supply device and a portable device according to the present invention will be described below with reference to the drawings.
- the power supply device of the present invention can be paraphrased as a semiconductor device because it is built in LSI. .
- FIG. 1 is a diagram showing a configuration of a power supply device according to a first embodiment of the present invention and a portable device using the same.
- the battery power supply BAT generates the power supply voltage Vcc.
- This supply voltage The voltage level of V cc changes depending on the state of charge / discharge of the battery power source BAT, and also includes a ripple component according to the change in the load amount of the load device.
- This power supply voltage V cc is input to the power supply unit 100 from the power supply voltage input terminal P V cc.
- the output circuit 10 is composed of a series regulator type including the output transistor 11. From the output circuit 10, the power supply voltage V cc is adjusted to a predetermined output voltage V output according to the control signal and output.
- the output transistor 1 1 is a P-type MOS transistor. In FIG. 1, the output circuit 10 is a series regulator using the output transistor 11. However, the output circuit 10 is not limited to this and may be a switching type output circuit.
- the output voltage V o u t is supplied from the output terminal P V o u t of the power supply device 1 0 0 to the output smoothing capacitor 3 1 0 and the load device 3 2 0.
- I o is the output current.
- the output voltage V o u t is divided by the voltage dividing resistors 1 2 and 1 3 to become the feedback voltage V f b.
- the error amplifier circuit 20 includes an error amplifier, compares the feedback voltage V fb with the reference voltage V ref, and outputs the output transistor so that the feedback voltage V fb becomes equal to the reference voltage V ref based on the comparison result. 1 Control 1
- the reference voltage generation circuit 30 receives an operating voltage.
- the reference voltage generation circuit 30 generates a reference voltage V re f of a predetermined level based on this operating voltage.
- the reference voltage generation circuit 30 is preferably composed of, for example, a band gap type constant voltage circuit or the like so as to output a reference voltage V r e f that is as stable as possible.
- V r e f a reference voltage included in the operating voltage
- An operation command signal (that is, a standby signal) STB for controlling the power supply device 100 to an operating state or a stopped state is input to the power supply device 100 via the operation command signal input terminal Pstb.
- the operation command signal STB is called a standby signal. It may be replaced.
- the output voltage Vout and the output current Io of the power supply unit 100 are zero, and the current consumption in the power supply unit 100 is zero or the minimum. The current is reduced to a very small current.
- the operation command signal S TB is ⁇ (H) level or low (L) level.
- the power supply device 100 is set to be in an operating state when the operation command signal STB is at an H level and to be in a stopped state when at an L level.
- the error amplification circuit 20 and the reference voltage generation circuit 30 are operated or stopped according to the operation command signal STB.
- the operation command signal S TB is supplied from the control device 200.
- the operation command signal S TB is an operation command voltage V st b (for example, about 1.5 to 3 V) at the H level, and is at the ground level, for example, at the L level. This operation command voltage V st b is input to the reference voltage generation circuit 30 as an operation voltage.
- the voltage level detection circuit 40 detects whether or not the voltage level of the operation command signal S TB exceeds a predetermined voltage level.
- the operation state or stop state of the reference voltage generation circuit 30 and the error amplification circuit 20 is determined according to the detection result of the voltage level detection circuit 40.
- a resistor 41 and an N-type MOS transistor 42 are connected in series between the power supply voltage Vcc and ground in that order, and operate as a gate of the N-type MOS transistor 42.
- Command signal S TB is applied. Then, the voltage at the connection point between the resistor 41 and the N-type MOS transistor 42 is inverted by the inverter 43 and output as a voltage detection result.
- the control device 200 includes a computer 220 that controls each device of the portable device.
- the control device 2 0 0 includes a voltage adjustment circuit (regulator) 2 1 0.
- This regulator 2 1 0 has the power supply voltage V cc and the computer 2 2 0 Adjust to the required voltage level and supply to computer 220. Even when the ripple voltage component is included in the source voltage V cc, the voltage with the ripple component suppressed to the computer 220 is stably supplied.
- the operation command voltage V st b of the t3 ⁇ 4 operation command signal S TB is also a stable voltage with little ripple component. Further, the power supply voltage V cc is also supplied to various load devices of the portable device ⁇ ⁇ as represented by the load device 330.
- the operation command signal SB when the operation command signal SB is generated from the control device 200, the voltage level of the operation command signal STB rises in a stepped manner, and the voltage level detection circuit 40 detects the H level. The result is output.
- the error amplifying circuit 20 and the reference voltage generating circuit 30, that is, the power supply device 100 are in an operational state.
- the operation command voltage V st b is supplied to the reference voltage generation circuit 30 to generate the reference voltage V re f.
- the error amplifier circuit 20 and the output transistor 1 L operate at a constant voltage based on the reference voltage V r e f, and the power supply device 100 outputs a predetermined output voltage V out.
- the reference voltage V r e f is generated by the reference voltage generation circuit 30 to which the operation command voltage s t b in which the ripple component is suppressed is input, and therefore includes almost no rible component. Therefore, even when the power supply voltage V cc includes a ripple component, the ripple component included in the output voltage V out is significantly reduced. In this way, since the operation command signal S TB supplied from the control device 20 0 is used as the operation voltage to the reference voltage generation circuit 30 of the power supply device 100, the rib rejection characteristics are improved.
- the current consumption does not increase and the power reduction characteristics are improved. Therefore, it is possible to extend the time that the battery power source B A T can be used.
- the operation command signal STB is used to command the operation or stop of the power supply unit 100. In addition to its original use, it is also used as an operating voltage for the reference voltage generation circuit 30. Therefore, the number of terminals of an IC power supply device is not increased.
- FIG. 2 is a diagram showing a configuration of a power supply device and a portable device using the same according to a second embodiment of the present invention.
- the chip select signal (chip-in) is used as a control signal for controlling the output 1 device 100 to the output enabled state.
- CE is input via the chip select signal input terminal Pee.
- the chip select signal CE is H level or L level.
- the power supply device 100 is set so that it can be output when the chip select signal CE is at the H level and is controlled so that it cannot be output when the chip select signal CE is at the L level.
- the chip select signal CE is supplied from the control device 200.
- the chip select signal CE is a chip select voltage Vce (for example, about 1.5 to 3 V) at the H level, and is a ground level, for example, at the L level. This chip select voltage Vce is input to the reference voltage generation circuit 30 as an operating voltage.
- the chip select voltage CE of the chip select signal CE is also a stable voltage with few ripple components.
- control signal may be any signal that controls the power supply device 100 so that its output voltage output can be output.
- a reset signal can also be used.
- the chip select signal CE when the chip select signal CE is generated from the control device 200, the voltage level of the chip select signal CE rises stepwise. As a result, the power supply device 100 becomes in a state where it can output the output voltage Vout. At the same time, the chip select voltage Vce is supplied as the reference voltage generating circuit 30.
- the reference voltage V r e f is generated from the reference voltage generation circuit 30, and the error amplifier circuit 20 and the output transistor 11 operate at a constant voltage based on the reference voltage V r e f.
- the power supply device 100 outputs a predetermined output voltage Vout.
- the other configurations in FIG. 2 are the same as those in FIG. 1, and the second embodiment of FIG. 2 can achieve the same effects as the first embodiment.
- FIG. 3 is a diagram illustrating a configuration of a power supply device according to a third embodiment of the present invention and a portable device using the same.
- FIG. 3 differs from FIG. 1 in that a switching switch circuit 2 3 0 and a smoothing circuit 2 40 are provided in place of the control device 2 0 0 of FIG. Otherwise, Figure 3 is similar to Figure 1.
- the switching switch circuit 2 3 0 includes a switching switch 2 3 1.
- Switching switch 2 3 1 common terminal c is switched to either the first terminal a connected to the power supply voltage V c c or the second terminal b connected to the ground.
- the smoothing circuit 2 4 0 comprises a resistor 2 4 1 and a capacitor 2 4 2, smoothes the power supply voltage V cc and outputs it as an operation command signal S TB.
- the switch 2 3 1 When the switch 2 3 1 is on the 2nd terminal b side, the operation command signal STB is at L level. Therefore, in this case, the power supply device 100 is in a stopped state.
- the switch 2 3 1 When the switch 2 3 1 is switched to the first terminal a, the power supply voltage V cc is input to the smoothing circuit 2 40.
- the ripple component included in the power supply voltage V cc is attenuated by the smoothing action of the smoothing circuit 240 and supplied to the power supply device 100 as the operation command signal S TB. .
- the smoothing action of the smoothing circuit 2 40 is determined by the resistance value of the resistor 2 4 1 and the capacitance of the capacitor 2 4 2. Only a very small current (for example, several A to several 10 A) flows through the smoothing circuit 24 0 as the operation command signal STB. Therefore, the resistance value of the resistor 2 4 1 can be increased, and the capacitance of the capacitor 2 4 2 can be decreased. Therefore, in the present invention, the smoothing circuit 240 can be reduced in size, which is suitable for a portable device.
- a smoothing circuit that performs the same smoothing action as the smoothing circuit 2 4 0 is provided in a current path through which a load current (for example, several 10 O mA) flows to the load devices 3 2 0 and 3 3 0, etc.
- a load current for example, several 10 O mA
- the resistance value of the resistor must be extremely small, and the capacitance of the capacitor must be extremely large. Therefore, it cannot be applied to portable devices that require miniaturization.
- the same effect as that of the first embodiment shown in FIG. 1 can be obtained, and the configuration therefor can be greatly simplified and downsized.
- the power supply voltage V cc may be supplied directly to the smoothing circuit 2 40 without passing through the switching switch circuit 2 3 0.
- the switch circuit
- the smoothing circuit 240 is not limited to the one using a resistor and a capacitor, and any one having a smoothing action such as one using a coil or one using a coil and a capacitor can be used. . Industrial applicability
- the power supply device is controlled to be in an operating state or a stopped state in accordance with an external operation command signal.
- the reference voltage generation circuit for generating the reference voltage is controlled to be in an operating state when the voltage level of the operation command signal exceeds a predetermined voltage level, and is controlled to be in a stopped state when the voltage level does not reach the predetermined voltage level.
- the voltage of the command signal is the operating voltage.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/718,220 US8120344B2 (en) | 2004-11-04 | 2005-10-25 | Power supply unit and portable device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-320182 | 2004-11-04 | ||
| JP2004320182A JP3739006B1 (ja) | 2004-11-04 | 2004-11-04 | 電源装置、及び携帯機器 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006049110A1 true WO2006049110A1 (ja) | 2006-05-11 |
Family
ID=35798451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/019954 Ceased WO2006049110A1 (ja) | 2004-11-04 | 2005-10-25 | 電源装置、及び携帯機器 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8120344B2 (ja) |
| JP (1) | JP3739006B1 (ja) |
| CN (1) | CN101048719A (ja) |
| TW (1) | TW200615735A (ja) |
| WO (1) | WO2006049110A1 (ja) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7626371B2 (en) | 2004-11-04 | 2009-12-01 | Rohm Co., Ltd. | Power supply unit and portable device |
| US7635969B2 (en) | 2004-11-04 | 2009-12-22 | Rohm Co., Ltd. | Power supply unit and portable device |
| US8120344B2 (en) | 2004-11-04 | 2012-02-21 | Rohm Co., Ltd. | Power supply unit and portable device |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5407510B2 (ja) * | 2008-08-29 | 2014-02-05 | 株式会社リコー | 定電圧回路装置 |
| TWI385510B (zh) * | 2008-12-31 | 2013-02-11 | Asustek Comp Inc | 自動調整驅動器輸入電源之裝置 |
| JP5062184B2 (ja) * | 2009-01-09 | 2012-10-31 | 株式会社デンソー | 電源回路装置 |
| JP5134022B2 (ja) * | 2010-01-17 | 2013-01-30 | レノボ・シンガポール・プライベート・リミテッド | プロセッサの電圧制御の方法 |
| JP6071531B2 (ja) * | 2012-12-25 | 2017-02-01 | ラピスセミコンダクタ株式会社 | 電源回路、半導体装置及び電子機器 |
| CN203607871U (zh) * | 2013-10-11 | 2014-05-21 | 成都芯源系统有限公司 | 电池放电电路和用于电池放电电路的控制器 |
| US10355505B2 (en) * | 2014-03-10 | 2019-07-16 | Dell Products L.P. | Method for adapter over-current-protection (OCP) protection and user warning |
| EP3081149A1 (en) | 2015-04-12 | 2016-10-19 | Taiwan Biophotonic Corporation | Device and method for alignment |
| JP7153458B2 (ja) * | 2018-03-26 | 2022-10-14 | ラピスセミコンダクタ株式会社 | 半導体装置及び電子機器 |
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2004
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- 2005-10-25 US US11/718,220 patent/US8120344B2/en active Active
- 2005-10-25 WO PCT/JP2005/019954 patent/WO2006049110A1/ja not_active Ceased
- 2005-10-25 CN CNA2005800365048A patent/CN101048719A/zh active Pending
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| US7626371B2 (en) | 2004-11-04 | 2009-12-01 | Rohm Co., Ltd. | Power supply unit and portable device |
| US7635969B2 (en) | 2004-11-04 | 2009-12-22 | Rohm Co., Ltd. | Power supply unit and portable device |
| US8120344B2 (en) | 2004-11-04 | 2012-02-21 | Rohm Co., Ltd. | Power supply unit and portable device |
Also Published As
| Publication number | Publication date |
|---|---|
| US8120344B2 (en) | 2012-02-21 |
| CN101048719A (zh) | 2007-10-03 |
| JP2006133934A (ja) | 2006-05-25 |
| US20090039844A1 (en) | 2009-02-12 |
| JP3739006B1 (ja) | 2006-01-25 |
| TW200615735A (en) | 2006-05-16 |
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