WO2018216661A1 - Dispositif d'alimentation et dispositif électronique - Google Patents
Dispositif d'alimentation et dispositif électronique Download PDFInfo
- Publication number
- WO2018216661A1 WO2018216661A1 PCT/JP2018/019540 JP2018019540W WO2018216661A1 WO 2018216661 A1 WO2018216661 A1 WO 2018216661A1 JP 2018019540 W JP2018019540 W JP 2018019540W WO 2018216661 A1 WO2018216661 A1 WO 2018216661A1
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- WIPO (PCT)
- Prior art keywords
- voltage
- detection circuit
- output
- control circuit
- input voltage
- Prior art date
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- 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
Definitions
- the present invention relates to a power supply device including a PMIC (Power Management IC) that acquires a voltage from a power source and distributes the voltage to each member of an electronic device.
- PMIC Power Management IC
- PMIC Power Management IC
- An electronic device can distribute an appropriate voltage to each member by mounting the PMIC.
- the output OFF control circuit 212 stops voltage generation in the voltage generation unit 214, and
- the output ON control circuit 213 generates voltage in the voltage generation unit 214 and outputs the output voltage Vout.
- Japanese Patent Publication Japanese Patent Laid-Open No. 2016-154384 (published on August 25, 2016)”
- the power of the electronic device when the power of the electronic device is turned off, the power is turned off based on the OFF sequence determined for each member of the electronic device by the output OFF control circuit 212 described above.
- An object of one embodiment of the present invention is to realize a power supply device that does not cause a malfunction in which the PMIC is turned on again when the power is turned off.
- a power supply device generates a voltage of various power supplies, outputs a generated voltage, and reduces a voltage output from the power control circuit.
- a voltage drop detection circuit that detects and transmits a signal indicating a drop in the detected output voltage to the power control circuit, and the power control circuit receives the signal from the voltage drop detection circuit, The generation operation is stopped.
- FIG. 3 is a waveform diagram of input / output voltages when the power is turned off in the PMIC shown in FIG. 2.
- FIG. 5 is a waveform diagram of input / output voltages when the power is turned off in the PMIC shown in FIG. 4. It is a block diagram for demonstrating the state of the load at the time of the power supply OFF in PMIC.
- Embodiment 1 Hereinafter, embodiments of the present invention will be described in detail.
- the power supply device of the present invention is mounted on a liquid crystal display device as an electronic device.
- FIG. 1 is a block diagram illustrating a schematic configuration of the power supply apparatus 101.
- the power supply device 101 acquires a voltage (IC power supply voltage) from a power supply and distributes the voltage (output voltage) to each part (various drivers, etc.) of the liquid crystal display device.
- (Power control circuit) 10 and a voltage drop detection circuit 20 that detects a drop in the voltage output from the PMIC 10 and transmits a signal indicating the detected voltage drop to the PMIC 10.
- the PMIC 10 When the PMIC 10 receives the signal from the voltage drop detection circuit 20 when the power is turned off, the PMIC 10 stops the voltage generation operation.
- the voltage drop detection circuit 20 realizes a drop in the output voltage output from the PMIC 10 by detecting the fall of the output voltage with respect to the reference voltage. Then, the voltage drop detection circuit 20 transmits to the PMIC 10 a signal indicating that the falling of the output voltage has been detected with respect to the reference voltage.
- FIG. 2 is a block diagram showing a schematic configuration of the PMIC 10.
- the PMIC 10 includes an input voltage detection circuit 11 that detects the input voltage Vin, an output OFF control circuit 12 that performs output OFF control based on an instruction from the input voltage detection circuit 11, and an output based on an instruction from the input voltage detection circuit 11.
- An output ON control circuit 13 that performs ON control of the voltage
- a voltage generation unit 14 that generates a voltage Vout to be output to each member of the liquid crystal display device
- a voltage drop detection circuit 20 receive signals, and the detection operation of the input voltage detection circuit 11 is performed.
- An operation invalid signal generation circuit 15 for generating an operation invalid signal to be invalidated is included.
- the input voltage detection circuit 11 is a circuit that detects the falling or rising of the input voltage Vin with respect to the reference voltage. That is, when the input voltage detection circuit 11 detects the falling of the input voltage Vin with respect to the reference voltage, the input voltage detection circuit 11 instructs the output OFF control circuit 12 to execute output OFF control. On the other hand, when the input voltage detection circuit 11 detects the rising edge of the input voltage Vin with respect to the reference voltage, the input voltage detection circuit 11 instructs the output ON control circuit 13 to execute output ON control.
- the output OFF control circuit 12 executes output OFF control based on an instruction from the input voltage detection circuit 11.
- the output ON control circuit 13 executes output ON control based on an instruction from the input voltage detection circuit 11.
- the output ON control is control for instructing the voltage generation unit 14 to generate voltage so that the output voltage Vout output from the PMIC 10 becomes a voltage necessary for each member. That is, if the output ON control is executed, the output voltage of the PMIC 10 is output as Vout> 0V.
- the voltage generation unit 14 generates a voltage according to instructions from the output OFF control circuit 12 and the output ON control circuit 13 and outputs the voltage as the output voltage Vout.
- the voltage drop of the output voltage Vout is detected by the voltage drop detection circuit 20.
- the operation invalid signal generation circuit 15 invalidates the detection operation of the input voltage detection circuit 11 from a signal indicating that the voltage drop detection circuit 20 detects a decrease in the output voltage Vout, that is, a fall with respect to the reference voltage. An operation invalid signal is generated. The operation invalid signal generation circuit 15 outputs the generated operation invalid signal to the input voltage detection circuit 11.
- the input voltage detection circuit 11 receives the operation invalid signal from the operation invalid signal generation circuit 15 and stops the operation of detecting the input voltage Vin, that is, the operation of detecting the falling or rising of the reference voltage.
- the input voltage Vin is not detected by the input voltage detection circuit 11 until the power supply device 101 is reset.
- FIG. 3 is a waveform diagram of input / output voltages when the PMIC 10 is turned off.
- the IC power supply voltage is the input voltage Vin of the PMIC 10
- the output voltage is the summer Vout at the output of the PMIC 10
- the voltage drop detection circuit 20 It is a signal that has detected a fall.
- the operation of the input voltage detection circuit 11 in the PMIC is stopped when the output voltage of the PMIC 10 is reduced.
- the PMIC is stopped.
- the operation of the voltage generation unit 14 (FIG. 2) is invalidated instead of invalidating the operation of the input voltage detection circuit 11 therein.
- the PMIC stops the voltage generation operation as in the case where the operation of the input voltage detection circuit 11 is invalidated.
- the PMIC 10 does not malfunction when the power is turned off.
- a liquid crystal display device is assumed as an electronic device to which the power supply device 101 is applied.
- the electronic device is not limited to the liquid crystal display device, and a PMIC is used. Any device can be used.
- the power supply device generates a voltage of various power supplies, detects a decrease in voltage output from the power control circuit (PMIC 10) that outputs the generated voltage, and the power control circuit (PMIC 10), A voltage drop detection circuit 20 for transmitting a signal indicating a drop in the detected output voltage to the power control circuit (PMIC 10).
- the power control circuit (PMIC 10) receives the signal from the voltage drop detection circuit 20 In this case, the voltage generation operation is stopped.
- the power control circuit when the power control circuit receives a signal indicating that the voltage drop output from the power control circuit is detected from the voltage drop detection circuit, the power control circuit invalidates the voltage generation operation by the power control circuit. Thus, even if the input voltage to the power control circuit increases and reaches the voltage at which the power control circuit operates, the operation of the power control circuit is invalid, and therefore the power control circuit is not turned on again. Absent.
- the power control circuit includes an input voltage detection circuit 11 that detects an input voltage, and various power supplies based on the input voltage detected by the input voltage detection circuit 11. And a voltage generation unit 14 that generates the voltage of the input voltage detection circuit 11.
- the detection operation of the input voltage detection circuit 11 may be invalidated.
- the power supply device is the power supply device according to aspect 1 described above, wherein the power control circuit (PMIC 10), the input voltage detection circuit 11 that detects an input voltage, and various power A voltage generation unit 14 that generates the voltage of the voltage, and when the signal is received from the voltage drop detection circuit 20, the voltage generation operation by the voltage generation unit 14 may be invalidated.
- PMIC 10 power control circuit
- the input voltage detection circuit 11 that detects an input voltage
- various power A voltage generation unit 14 that generates the voltage of the voltage, and when the signal is received from the voltage drop detection circuit 20, the voltage generation operation by the voltage generation unit 14 may be invalidated.
- the power control circuit (PMIC 10) is configured such that when the input voltage detected by the input voltage detection circuit 11 rises with respect to a reference voltage, Voltage generation by the voltage generator 14 when the output ON control circuit 13 that instructs the voltage generator 14 to generate voltage and the input voltage detected by the input voltage detector 11 falls with respect to a reference voltage And an output OFF control circuit 12 for instructing to stop the operation.
- the power supply device is the power supply device according to any one of the aspects 2 to 4, wherein the voltage drop detection circuit 20 corresponds to a reference voltage of an output voltage output from the power control circuit (PMIC 10).
- the voltage drop detection circuit 20 corresponds to a reference voltage of an output voltage output from the power control circuit (PMIC 10).
- An electronic apparatus is characterized by including the power supply device 101 according to any one of aspects 1 to 4.
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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)
- Direct Current Feeding And Distribution (AREA)
Abstract
L'objet de la présente invention est d'empêcher un circuit de gestion de puissance de mettre sous tension par erreur la source d'alimentation qui était hors tension. L'invention concerne un dispositif d'alimentation électrique (101) comprenant un circuit de détection de chute de tension (20) qui détecte une chute de la tension délivrée par un PMIC (10) et transmet au PMIC (10) un signal indiquant la chute de tension de sortie détectée. À réception du signal provenant du circuit de détection de chute de tension (20), le PMIC (10) interrompt le comportement de mise sous tension.
Applications Claiming Priority (2)
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JP2017104919 | 2017-05-26 | ||
JP2017-104919 | 2017-05-26 |
Publications (1)
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WO2018216661A1 true WO2018216661A1 (fr) | 2018-11-29 |
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PCT/JP2018/019540 WO2018216661A1 (fr) | 2017-05-26 | 2018-05-21 | Dispositif d'alimentation et dispositif électronique |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI836524B (zh) * | 2022-07-25 | 2024-03-21 | 聯詠科技股份有限公司 | 回授控制系統 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01116712A (ja) * | 1987-10-30 | 1989-05-09 | Sony Corp | 安定化電源回路 |
JPH10337007A (ja) * | 1997-06-03 | 1998-12-18 | Murata Mfg Co Ltd | Dc−dcコンバータ装置 |
JP2009100496A (ja) * | 2007-10-12 | 2009-05-07 | Funai Electric Co Ltd | 電圧供給装置 |
JP2010015348A (ja) * | 2008-07-03 | 2010-01-21 | Mitsubishi Electric Corp | 電源回路 |
JP2013153585A (ja) * | 2012-01-25 | 2013-08-08 | Asahi Kasei Electronics Co Ltd | Dc−dcコンバータ |
JP2014057465A (ja) * | 2012-09-13 | 2014-03-27 | Nichicon Corp | Dc/dcコンバータ、および電源システム |
-
2018
- 2018-05-21 WO PCT/JP2018/019540 patent/WO2018216661A1/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01116712A (ja) * | 1987-10-30 | 1989-05-09 | Sony Corp | 安定化電源回路 |
JPH10337007A (ja) * | 1997-06-03 | 1998-12-18 | Murata Mfg Co Ltd | Dc−dcコンバータ装置 |
JP2009100496A (ja) * | 2007-10-12 | 2009-05-07 | Funai Electric Co Ltd | 電圧供給装置 |
JP2010015348A (ja) * | 2008-07-03 | 2010-01-21 | Mitsubishi Electric Corp | 電源回路 |
JP2013153585A (ja) * | 2012-01-25 | 2013-08-08 | Asahi Kasei Electronics Co Ltd | Dc−dcコンバータ |
JP2014057465A (ja) * | 2012-09-13 | 2014-03-27 | Nichicon Corp | Dc/dcコンバータ、および電源システム |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI836524B (zh) * | 2022-07-25 | 2024-03-21 | 聯詠科技股份有限公司 | 回授控制系統 |
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