GB2415796A - Regulating switching power supply frequency dependant on computer operating status - Google Patents

Regulating switching power supply frequency dependant on computer operating status Download PDF

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Publication number
GB2415796A
GB2415796A GB0414944A GB0414944A GB2415796A GB 2415796 A GB2415796 A GB 2415796A GB 0414944 A GB0414944 A GB 0414944A GB 0414944 A GB0414944 A GB 0414944A GB 2415796 A GB2415796 A GB 2415796A
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GB
United Kingdom
Prior art keywords
operating frequency
power supply
trigger condition
circuit operating
sensor
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.)
Granted
Application number
GB0414944A
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GB0414944D0 (en
GB2415796B (en
Inventor
Yung-Cheng Chiu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giga Byte Technology Co Ltd
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Giga Byte Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP2004172549A priority Critical patent/JP2005354801A/en
Application filed by Giga Byte Technology Co Ltd filed Critical Giga Byte Technology Co Ltd
Priority to GB0414944A priority patent/GB2415796B/en
Priority to DE102004032497A priority patent/DE102004032497A1/en
Priority to FR0407631A priority patent/FR2872929B1/en
Publication of GB0414944D0 publication Critical patent/GB0414944D0/en
Publication of GB2415796A publication Critical patent/GB2415796A/en
Application granted granted Critical
Publication of GB2415796B publication Critical patent/GB2415796B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • 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
    • G05F1/565—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 sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means
    • G06F1/206—Cooling means comprising thermal management
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A pulse width modulated (PWM) switching power supply frequency supplying a computer is varied according to the operating status of the computer. A sensing monitoring unit is started S100; a trigger condition value which triggers raising or lowering of the PWM frequency is set and stored S102; the computer operating condition is sensed and monitored S104; and dynamically compared with the trigger value S106 whereupon the PWM switching frequency is either increased or decreased. The operating status may be monitored at critical places within the computer and may include voltage, current, temperature and program load. The monitor trigger value may be factory set and/or user set and there may be at least one trigger value for each type of monitored condition value.

Description

24 1 5796
SWITCHING POWER SUPPLY SYSTEM AND METHOD
The present invention relates to a switching power supply system for automatically regulating a circuit operating frequency and the method thereof, and particularly, to a switching power supply system adapted to a computer system and capable of automatically regulating a circuit operating frequency, and the method thereof.
Referring to Figure 1, a schematic block diagram of a conventional switching power supply system is shown. The switching power supply system employs pulse width modulation (PWM) technology to control a power switch (not shown) in a DC converter 11 and supplies power to the system through a filter network 13.
According to the pulse width modulation (PWM) technology, an oscillator circuit 17 provides a signal with constant frequency to a pulse width modulation unit 15. Meanwhile, a comparator 12 detects the DC voltage at the output terminal. If the voltage obtained by dividing the DC voltage at the output terminal through a voltage divider network 14 becomes lower than a reference voltage 16, that is, if the output loading becomes heavy, then output square waves from the pulse width modulation unit 15 will be widened, which - 1 means a duty cycle of the power switch (not shown) will be increased.
Thereby, compensation for the output voltage is provided to bring the output voltage back to the original rating value and thus the output voltage can be stabilized.
Similarly, if the loading becomes low, then the comparator 12 will detect that the voltage obtained by dividing the DC voltage at the output terminal through the voltage divider network 14 is greater than the reference voltage 16, and therefore the duty cycle of the output square waves from the pulse width modulation unit 15 will be reduced, which means the duty cycle of the power switch will be reduced. Thereby, the output DC voltage will be lowered to the original rating value and thus stabilized. In this circuit, the operating frequency of the power switch (not shown) does not vary with the change of the duty cycle. In other words, the circuit operating frequency always stays constant.
At present, the pulse width modulation (PWM) technology is utilized in a computer system to supply power required for the operation of a central processing unit (CPU). For the reason described above, operating frequency from the pulse width modulation PVVM in a power supply system for the central processing unit (CPU) always stays constant and cannot be changed after the design is made.
Consequently, once the design is complete, the operating frequency from the pulse width modulation PWM cannot be changed in response to any current load variations resulting from execution of any software by any type of central processing unit (CPU), environmental variations inside/outside the housing and voltage variations caused by the power supply or by the load. Therefore, it is impossible to contribute anything to operating efficiency enhancement of pulse width modulation PWM, reduction in switching loss, suppression of system temperature, improvement of sawtooth current and decrease in peak-to-peak ripple voltage. Accordingly, the output voltage and the whole system are unstable, and the efficiency of the components cannot be maximized, which seriously impacts the performance of the computer.
In view of the above, the present invention provides a switching power supply system for automatically regulating a circuit operating frequency and the method thereof to provide a switching power supply system and a method for dynamically increasing or decreasing an operating frequency (clock frequency) of a computer system. The present invention has excellent effects on operating efficiency enhancement of pulse width modulation PWM, reduction in switching loss, suppression of system temperature, improvement of sawtooth current and decrease in peak-to-peak ripple voltage.
In one embodiment of the present invention, a sensing and monitoring unity connected to the computer system detects a model number of the central processing unit (CPU), current consumption of the central processing unit (CPU), temperature change inside/outside the housing or at a predetermined point, voltage variations and load variations in the computer system and generates a detection value. The detection value is then transmitted to a comparator unit associated with the sensing and monitoring unit. Then, the comparator unit compares the detection value with a trigger condition value stored in a storage unit and outputs a comparison result signal to a PRIM switching frequency regulator unit. The trigger condition value stored in the storage unit is obtained from a setting operation by a setting unit.
In the above embodiment, the PWM switching frequency regulator unit dynamically increases or decreases the operating frequency of the pulse width modulation PWM based on the comparison result signal so that the converter can supply power to the computer system more efficiently.
In the switching power supply system for automatically regulating a circuit operating frequency and the method thereof according to the present invention, through dynamically monitoring the operating status change of the computer system by the sensing and monitoring unit, when the status change exceeds a pre-set trigger value, the PRIM switching frequency regulator unit can dynamically increase or decrease the operating frequency of the pulse width modulation PWM based on the comparison result signal so that the converter can efficiently supply power to the computer system in response to the changing environment.
BRIEF DESCRIPTION OF THE DRAVVINGS
I;eatures and advantages of one embodiment of the present invention will be fully understood from the detailed description to follow when taken in conjunction with the accompanying drawings, which are to be considered in all respects as illustrative and not restrictive, wherein: Figure l schematically illustrates a block diagram of the conventional switching power supply system; Figure 2 schematically illustrates a block diagram of one switching power supply system for automatically regulating a circuit operating frequency according to the present invention; and - Figure 3 is a flow chart for explaining the method for automatically regulating a circuit operating frequency according to the present invention.
Referring to Figure 2, a schematic block diagram of a switching power supply system for automatically regulating a circuit operating frequency according to the present invention is shown. The switching power supply system for automatically regulating a circuit operating frequency 2, which is used for regulating an operating frequency of a converter 3 to supply a DC power to a computer system 4, includes a sensing and monitoring unit 24, a comparator unit 26, a PWM switching frequency regulator unit 27, a storage unit 28 and a setting unit 29.
Referring again to Figure 2, the sensing and monitoring unit 24, which is connected to the computer system 4, detects an operating status of the computer system 4 and outputs a detection value. The setting unit 29, which is connected to the storage unit 28, is used for setting a trigger condition value and storing the trigger condition value into the storage unit 28. In the above description, the trigger condition value serves as a trigger condition value for regulating the operating frequency. The comparator unit 26, which is connected to the sensing and monitoring unit 24 and the storage unit 28 to receive the detection value from the sensing and monitoring unit 24 and the trigger condition value stored in the storage unit 28, carries out a comparison operation and outputs a comparison result signal. The PWM switching frequency regulator unit 27, which is connected to the comparator unit 26 and to the converter 3, receives the comparison result signal from the comparator unit 26 and dynamically and automatically increases or decreases the operating frequency of the pulse width modulation PWM based on the comparison result signal so that the converter 3 can supply power to the computer system 4 more efficiently.
Referring again to Figure 2, the sensing and monitoring unit 24 includes a sensor (not shown) and a monitoring module (not shown). The sensor may be a voltage sensor, a current sensor, a temperature sensor, a load sensor or the like.
The monitoring module may be a voltage monitoring module, a current monitoring module, a temperature monitoring module, a load monitoring module or the like. The sensing and monitoring unit 24 is connected to a key point (not shown) in the computer system 4 through the sensor so as to detect the operating status of the computer system 4. The monitoring module cooperates with the sensor so as to monitor dynamically the voltage, current, temperature or program load in the computer system 4 and then dynamically delivers an indication of the status change to the system.
In the above description, the sensing and monitoring unit 24 may consist of a combination of at least one sensor (not shown) and at least one monitoring module (not shown). The sensor may be a voltage sensor, a current sensor, a temperature sensor, a load sensor or the like. The monitoring module may be a voltage monitoring module, a current monitoring module, a temperature monitoring module, a load monitoring module or the like. The sensing and monitoring unit 24 is connected to multiple key points in the computer system 4 through those sensors so as to detect the environmental changes for the computer system 4 with higher sensitivity. The monitoring modules cooperate with the corresponding sensors so as to monitor dynamically the voltage, current, temperature and program load in the computer system 4 and then dynamically deliver indications of these status changes to the system.
Referring again to Figure 2, the trigger condition value may be set through the setting unit 29 by a user upon turning on the system. Moreover, a combination of multiple trigger condition values may be set in accordance with different demands. The trigger condition values are stored in the storage unit 28. In the subsequent process, the comparator unit 26 in the system compares the trigger condition values, which are set by the user, with the detection values, which indicate the system status and are output from the sensors, to determine whether an increase or an decrease in the operating frequency of the pulse width modulation (PWM) is to be carried out.
Under any operation system, when the computer system 4 is requested to run a heavy load program or a program that is to be executed for a long period of time, the system automatically increases the operating frequency of the pulse width modulation (PWM) according to the demand. When the system returns to a normal state or when the program terminates, the PWM operating frequency will be regulated back to the original operating frequency. During the operation, it is not required to employ any software for switching the frequency, nor is it required to reset the computer system 4. No programs being run on the computer will be adversely affected by the switching process.
The invention may employ a single temperature monitor comprised of a / temperature sensor and a temperature monitoring module. When temperature of a power switch MOS in the pulse width modulation PWM for controlling the converter 3 is overheated, the system will automatically decrease the operating frequency of the pulse width modulation PWM so that the temperature of the power switch MOS can be lowered. When the temperature of a power switch MOS in the pulse width modulation PWM for controlling the converter 3 falls below a pre-set temperature, the pulse width modulation PWM will be operated at a higher switching frequency. The present invention is advantageous because of its short response time and high compatibility. In addition, stability and efficiency can be maximized since modification or setting of the sensors is allowed to be carried out under any type of operation systems without resetting the computer system 4.
Referring to Figure 3, a flow chart for explaining the method for automatically regulating a circuit operating frequency according to the present invention is shown. The method for automatically regulating a circuit operating frequency of the invention comprises the steps described as follows.
First, operation of a sensing and monitoring unit is started (S100). Next, a trigger condition value is set for regulating the circuit operating frequency (S102). Then, an operating status of a computer system is dynamically sensed and monitored, and a detection value is obtained for the operating status of the computer system (S104). Further, the trigger condition value is dynamically compared with the detection value for the operating status of the computer system (Sl06). Finally, the circuit operating frequency of the converter is dynamically regulated through a PWM switching frequency regulator unit based on a comparison result S 108.
Referring to both Figure 2 and Figure 3, the sensing and monitoring unit 24 includes a sensor (not shown) and a monitoring module (not shown). The sensor may be a voltage sensor, a current sensor, a temperature sensor, a load sensor or the like or a combination of any of these sensors. Each sensor cooperates with a corresponding monitoring module to monitor dynamically the status of the computer system 4 and accordingly output a detection value.
The monitoring module may be a voltage monitoring module, a current monitoring module, a temperature monitoring module, a load monitoring module or the like.
In the above step of trigger condition setting, the trigger condition value can be set as a trigger condition value for a single sensor, or it can also be set as at least one trigger condition value for at least on sensor. In addition, the trigger condition value can be set as a factory default value and stored in the storage unit 28 of the computer system before shipping to customers, or it can also be set to a desired value by a user and stored in the storage unit 28 of the computer system upon turning on the computer system.
In the step of dynamically regulating the operating frequency of the converter, the system compares the trigger condition value set by the user with the detection value from the sensing and monitoring unit 24 to determine how to regulate the operating frequency of the pulse width modulation PWM; that is, whether the operating frequency of the pulse width modulation PWM is to be increased or decreased. Certainly, if the operating status does not exceed the pre-set trigger condition value, then the operating frequency of the pulse width modulation PWM is maintained at a constant rate.
As described above, the switching power supply system for automatically regulating a circuit operating frequency and the method thereof according to the present invention provide a switching power supply system and a method for dynamically increase or decrease an operating frequency of the computer system 4. The present invention has excellent effects on operating efficiency enhancement of pulse width modulation PWM, reduction in switching loss, suppression of system temperature, improvement of sawtooth current and decrease in peak-to-peak ripple voltage.
While the present invention has been described with reference to the detailed description and the drawings of the preferred embodiment thereof, it is to be understood that the invention should not be considered as limited thereby.
Various modifications and changes could be conceived of by those skilled in the art without departuring from the scope of the present invention, which is indicated by the appended claims.

Claims (16)

  1. Claims 1. A switching power supply system for automatically regulating a
    circuit operating frequency of a converter to supply a DC power to a computer system, comprising: a sensing and monitoring unit connected to said computer system for detecting an operating status of said computer system and outputting a detection value; a setting unit for setting trigger condition value to regulate the circuit operating frequency; a storage unit connected to said setting unit for storing said trigger condition value; a comparator unit connected to said storage unit and to said sensing and monitoring unit for comparing said detection value with said trigger condition value and outputting a comparison result signal; and a PWM switching frequency regulator unit connected to said comparator unit and to said converter for receiving said comparison result signal and regulating the circuit operating frequency of said converter based on said comparison result signal.
  2. 2. The switching power supply system for automatically regulating a circuit operating frequency of claim 1, wherein said sensing and monitoring unit includes at least one sensor and at least one monitoring module.
  3. 3. The switching power supply system for automatically regulating a circuit operating frequency of claim 2, wherein said sensor is any combination of a voltage sensor, a current sensor, a temperature sensor and a load sensor.
  4. 4. The switching power supply system for automatically regulating a circuit operating frequency of claim 2, wherein said monitoring module is any combination of a voltage monitoring module, a current monitoring module, a temperature monitoring module and a load monitoring module.
  5. 5. The switching power supply system for automatically regulating a circuit operating frequency of claim 1, wherein said sensing and monitoring unit includes a sensor and a monitoring module.
  6. 6. The switching power supply system for automatically regulating a circuit operating frequency of claim 5, wherein said sensor is a voltage sensor, a current sensor, a temperature sensor or a load sensor.
  7. 7. The switching power supply system for automatically regulating a circuit operating frequency of claim 5, wherein said monitoring module is a voltage monitoring module, a current monitoring module, a temperature monitoring module or a load monitoring module.
  8. 8. A method for automatically regulating a circuit operating frequency of a converter to supply a DC power to a computer system, comprising the steps of: starting operation of a sensing and monitoring unit; setting a trigger condition value for regulating the circuit operating frequency; dynamically sensing and monitoring an operating status of said computer system and obtaining a detection value for the operating status of said computer system; dynamically comparing said trigger condition value with said detection value for the operating status of said computer system; and dynamically regulating the circuit operating frequency of said converter through a PWM switching frequency regulator unit based on a comparison result.
  9. 9. The method for automatically regulating a circuit operating frequency of claim 8, wherein the step of setting said trigger condition value comprises setting a single trigger condition value for a single sensor.
  10. 10. The method for automatically regulating a circuit operating frequency of claim 8, wherein the step of setting said trigger condition value comprises setting at least one trigger condition value for at least one sensor.
  11. 11. The method for automatically regulating a circuit operating frequency of claim 8, wherein the step of setting said trigger condition value comprises setting and storing said trigger condition value in a storage unit of said computer system as a factory default value.
  12. 12. The method for automatically regulating a circuit operating frequency of claim 8, wherein the step of setting said trigger condition value comprises setting said trigger condition value by a user and storing said trigger condition value in a storage unit of said computer system upon turning on said computer system.
  13. 13. The method for automatically regulating a circuit operating frequency of claim 8, wherein the step of dynamically regulating the circuit operating frequency of said converter includes a regulation of decrease or increase in the operating frequency.
  14. 14. A switch mode power supply for a computer, the power supply including a pulse width modulation unit which controls the output voltage of the power supply, and means for monitoring the load status of the computer, said pulse width modulation unit being arranged to vary its operating frequency in response to an output signal of said monitoring means.
    2 0
  15. 15. A switch mode power supply substantially as described herein with reference to Figures 2 and 3 of the accompanying drawings.
  16. 16. A method of operating a switch mode power supply substantially as described herein with reference to Figures 2 and 3 of the accompanying drawings.
GB0414944A 2004-07-02 2004-07-02 Switching power supply system and method Active GB2415796B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2004172549A JP2005354801A (en) 2004-07-02 2004-06-10 Replaceable power supply system for electric circuit work frequency automatic regulation, and electric circuit work frequency automatic regulating method
GB0414944A GB2415796B (en) 2004-07-02 2004-07-02 Switching power supply system and method
DE102004032497A DE102004032497A1 (en) 2004-07-02 2004-07-05 Switching current supply system for automatically controlling a switching circuit operating frequency in a transformer supplies a direct voltage current to a computer system
FR0407631A FR2872929B1 (en) 2004-07-02 2004-07-08 ELECTRIC POWER SWITCHING SYSTEM AND METHOD FOR AUTOMATICALLY CONTROLLING THE OPERATING FREQUENCY OF A CIRCUIT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0414944A GB2415796B (en) 2004-07-02 2004-07-02 Switching power supply system and method

Publications (3)

Publication Number Publication Date
GB0414944D0 GB0414944D0 (en) 2004-08-04
GB2415796A true GB2415796A (en) 2006-01-04
GB2415796B GB2415796B (en) 2006-06-21

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GB0414944A Active GB2415796B (en) 2004-07-02 2004-07-02 Switching power supply system and method

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JP (1) JP2005354801A (en)
DE (1) DE102004032497A1 (en)
FR (1) FR2872929B1 (en)
GB (1) GB2415796B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7471530B2 (en) * 2006-10-04 2008-12-30 Power Integrations, Inc. Method and apparatus to reduce audio frequencies in a switching power supply
GB2483420B (en) 2009-06-23 2015-02-18 Hewlett Packard Development Co Power distribution to computer systems
US9134783B2 (en) * 2010-03-24 2015-09-15 Hewlett-Packard Development Company, L.P. Power capping feedback normalization
US8693217B2 (en) 2011-09-23 2014-04-08 Power Integrations, Inc. Power supply controller with minimum-sum multi-cycle modulation
US9190906B2 (en) * 2012-05-16 2015-11-17 Intel Deutschland Gmbh Digital event generator, comparator, switched mode energy converter and method
CN106802844A (en) * 2016-12-30 2017-06-06 郑州云海信息技术有限公司 A kind of fan control system and method for fan control signal state
CN108738115A (en) * 2017-04-25 2018-11-02 中兴通讯股份有限公司 A kind of power consumption control method and terminal

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10248244A (en) * 1997-03-04 1998-09-14 Mitsubishi Electric Corp Power supply device for portable-type computer
US6320766B1 (en) * 2000-07-31 2001-11-20 Samsung Electronics Co., Ltd. Power-saving circuit for an AC/DC adaptor for a portable computer
US6366070B1 (en) * 2001-07-12 2002-04-02 Analog Devices, Inc. Switching voltage regulator with dual modulation control scheme
JP2004112913A (en) * 2002-09-18 2004-04-08 Ricoh Co Ltd Power unit

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62114469A (en) * 1985-11-08 1987-05-26 Matsushita Electric Ind Co Ltd Power unit
JPH11272344A (en) * 1998-03-20 1999-10-08 Fujitsu Ltd Power supply device and method for controlling power supply circuit
US5982161A (en) * 1998-10-14 1999-11-09 Intel Corporation Voltage regulator having variable frequency-based control
JP2001008441A (en) * 1999-06-16 2001-01-12 Fujitsu Ten Ltd Dc-dc converter
US6232755B1 (en) * 2000-01-31 2001-05-15 Intel Corporation Switching voltage regulator that adjusts a timing in response to a load transient
JP2002182776A (en) * 2000-12-18 2002-06-26 Kenwood Corp System and method for controlling operating frequency
KR100424484B1 (en) * 2001-07-05 2004-03-24 엘지전자 주식회사 A power supply for central processing unit
US6639391B2 (en) * 2002-02-25 2003-10-28 Intel Corporation Variable switching frequency voltage regulator to optimize power loss
JP4030408B2 (en) * 2002-10-31 2008-01-09 シャープ株式会社 Operating frequency control system and method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10248244A (en) * 1997-03-04 1998-09-14 Mitsubishi Electric Corp Power supply device for portable-type computer
US6320766B1 (en) * 2000-07-31 2001-11-20 Samsung Electronics Co., Ltd. Power-saving circuit for an AC/DC adaptor for a portable computer
US6366070B1 (en) * 2001-07-12 2002-04-02 Analog Devices, Inc. Switching voltage regulator with dual modulation control scheme
JP2004112913A (en) * 2002-09-18 2004-04-08 Ricoh Co Ltd Power unit

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JP2005354801A (en) 2005-12-22
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FR2872929A1 (en) 2006-01-13
FR2872929B1 (en) 2006-10-06

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