CN102142773A - Power management integrated circuit and power management method - Google Patents
Power management integrated circuit and power management method Download PDFInfo
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- CN102142773A CN102142773A CN2010101104620A CN201010110462A CN102142773A CN 102142773 A CN102142773 A CN 102142773A CN 2010101104620 A CN2010101104620 A CN 2010101104620A CN 201010110462 A CN201010110462 A CN 201010110462A CN 102142773 A CN102142773 A CN 102142773A
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- 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
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Abstract
The invention relates to a power management integrated circuit and a relevant power management method. The power management integrated circuit comprises a high-voltage start-up circuit, a switch controller and a standby controller. The high-voltage start-up circuit is powered by a high-voltage power supply and used for supplying electric energy to an operation power supply within a starting time. The switch controller is used for controlling a power switch so as to control energy storage and release of an energy conversion unit. The standby controller is powered by the high-voltage power supply and used for receiving a closing signal. When the closing signal indicates enabling, the standby controller disables the high-voltage start-up circuit and the switch controller so that the high-voltage start-up circuit does not supply electric energy to the operation power supply and the switch controller continuously powers off the power switch.
Description
Technical field
The present invention is relevant for electric power controller in the electronic installation and relevant control method.
Background technology
How evolution along with the science and technology epoch makes electronic installation avoid consuming the energy that there is no need, and carbon reduction has been the trend in epoch.Even, many rules or authentication have been arranged, come the energy-saving effect of standard electronic installation.For example, Energy Star (energy star) just has the energy-output ratio of standard display when standby.Therefore, how to make electronic installation effectively energy-conservation, be everybody institute's pursuing target.
Fig. 1 is existing power supply supply framework.AC input 20 is connected to civil power, for example 110 or 220 volts AC power V
ACPower panel 30 in the transformer is with AC power V
ACConvert suitable out-put supply V to
OUT, be supplied to the motherboard 40 in the computer.In order to strengthen energy-saving effect, judging when motherboard 40 need be by power panel 30 supply out-put supply V
OUTThe time, for example motherboard 40 is not started shooting or when being in holding state, motherboard 40 is with shutdown signal (shutdownsignal) S
SDO, powered-down plate 30.Power supply supply framework among Fig. 1 just is not applicable to computer, goes for other appliance and electronic yet, such as LCD monitor (LCD monitor) etc.
Yet how be closed of power panel 30 can be according to the difference of system requirements, and the different practices is arranged.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of power management integrated circuit and method for managing power supply, can be energy-conservation effectively.
One embodiment of the invention provide a power management integrated circuit, include a high-voltage starting circuit, an on-off controller and an Opportunity awaiting control for linear device.This high-voltage starting circuit is powered by a high voltage source, and in order in a start-up time, the supply electric energy gives an operating power.This on-off controller is controlled a power switch, uses the store energy and the release of control one energy conversion unit.This Opportunity awaiting control for linear device is by this high voltage source power supply, in order to receive a shutdown signal.When this shutdown signal was activation, this this high-voltage starting circuit of Opportunity awaiting control for linear device forbidden energy and this on-off controller make this high-voltage starting circuit not supply electric energy and give this operating power, and this on-off controller continued to cut out this power switch.
One embodiment of the invention provide a kind of method for managing power supply.One power management integrated circuit is provided earlier.This power management integrated circuit is coupled to a high voltage source, and the store energy and the release of an energy conversion unit is controlled in the open and close that can see through a power switch.This power management integrated circuit has a high voltage startup function.Receive a shutdown signal.When this shutdown signal is activation, this high voltage startup function of forbidden energy, and keep and close this power switch.When this shutdown signal is forbidden energy, this high voltage startup function of activation, and control this power switch, make this energy conversion unit storage and release energy.
According to power management integrated circuit of the present invention, when the shutdown signal of Opportunity awaiting control for linear device reception is activation, high-voltage starting circuit is closed, and also compulsory the keeping of on-off controller close power switch, and whole power management integrated circuit enters the holding state that consumed power will be very little.
Description of drawings
Fig. 1 is existing power supply supply framework;
Fig. 2 is the power panel according to the present invention implemented;
Fig. 3 is an embodiment of the power management integrated circuit 306 among Fig. 2;
Fig. 4 A is an embodiment of the Opportunity awaiting control for linear device 426 among Fig. 3;
Fig. 4 B is an embodiment of the high-voltage starting circuit 414 among Fig. 3.
[main element symbol description]
The 20:AC input
30,30a: power panel
40: motherboard
304: bridge rectifier
306,306a: power management integrated circuit
308: feedback circuit
310: optical coupler
406: clock pulse generator
414: high-voltage starting circuit
426: the Opportunity awaiting control for linear device
427: on-off controller
428: controller of pulse width modulation
430: drive circuit
502: current source
504: resistance
506: the logic determines device
508: the controllable current source
510: the detecting voltage device
V
AC: AC power
V
OUT: out-put supply
V
IN: high voltage source after the rectification
SW: power switch
GATE: door end
VCC: power end
L
P: a winding
L
S: secondary winding
L
A: auxiliary winding
V
CC: operating power
S
FB: feedback signal
FB: feedback end
HV: high-pressure side
R
STRT: starting resistance
S
CS: the current sense signal
CS: current sense terminal
R
CS: detecting resistance
V
CS: voltage
SD: Opportunity awaiting control for linear end
S
SDO, S
SD: shutdown signal
En-STUP, En-PWM: signal
Embodiment
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, and cooperate appended accompanying drawing, be described in detail below.
For the convenience on illustrating, having function that be equal to or similar will be with the components identical symbolic representation.So the element of identical symbol does not represent that two elements is inevitable identical among the different embodiment.Scope of the present invention should decide with the foundation claim.
Fig. 2 is the power panel 30a according to the present invention implemented.Power panel 30a has a flyback (flyback) power supply changeover device (converter), will be by AC power V
ACThe energy of being imported converts the out-put supply V that meets a specification demand to
OUTBridge rectifier (bridge rectifier) 304 rough with AC power V
ACRectification is to produce high voltage source V after the rectification
INPower switch SW is connected to the door end GATE of power management integrated circuit 306, a winding (primarywinding) L in the control transformer (transformer)
pIn electric current.When power switch SW opens (on), the energy storage in the transformer is increased; When power switch SW closes (off), can make the energy storage in the transformer see through secondary winding (secondarywinding) L
sWith auxiliary winding (auxiliary winding) L
AAnd discharge.By secondary winding L
sThe electric energy that discharges through rectifier, is deposited in the output capacitance, and produces out-put supply V
OUTAuxiliary winding (auxiliary coil) L
AThe electric energy of being exported, the then required operating power V of power supply management integrated circuit 306 general operations
CC, import by power end VCC.
Shutdown signal S
SDBe considered as activation when being positioned at the accurate position of a high voltage logic, following benefit can be arranged: when power panel 30 does not connect load, such as the motherboard among Fig. 1 40 is not when also connecting with the mains plate 30, shutdown signal S
SDOTo be positioned at the accurate position of a low logic voltage, shutdown signal S
SDTo be positioned at the accurate position of a high voltage logic, power panel 30 just directly enters holding state, can reduce power loss.
Fig. 3 is an embodiment of the power management integrated circuit 306 among Fig. 2.In Fig. 3, power management integrated circuit 306a has a high voltage startup function, is realized by high-voltage starting circuit 414.High-voltage starting circuit 414 receives high voltage source V after the rectification from high-pressure side HV
INIn a start-up time, at operating power V
CCVoltage (for example its default minimum is 20 volts) also do not set up before, high-voltage starting circuit 414 supply charging currents see through power end VCC, to plug-in capacitor C
VCCCharging produces operating power V
CCOperating power V
CCVoltage exceed a predetermined value after, on-off controller 427 just comes into operation with clock pulse generator 406.
On-off controller 427 includes pulse wave width modulation (pulse width modulation, PWM) controller 428 and drive circuit 430.Controller of pulse width modulation 428 is according to the feedback signal S that comes from feedback end FB
FB, the current sense signal S that comes from current sense terminal CS
CS, and from the clock signal of clock pulse generator 406, control Driver Circuit 430 according to this.430 of drive circuits see through a door end GATE, and the store energy or the release of control transformer are used in the unlatching of the power switch SW in the control chart 2 or close.
In Fig. 3, controller of pulse width modulation 428 can be under the fixedly clock pulse frequency of the clock signal that clock pulse generator 406 is provided, the work period of power controlling switch SW (work duty).In another embodiment, the opening time (constantON time) that controller of pulse width modulation can the constant power switch SW, and the shut-in time of modulation power switch SW or work time pulse frequency.In another embodiment, under the shut-in time of controller of pulse width modulation constant power switch SW (constant OFF time), and the opening time of modulation power switch SW or work time pulse frequency.
Opportunity awaiting control for linear device 426 is connected to high-pressure side HV, by high voltage source V after the rectification
INPower supply.See through Opportunity awaiting control for linear end SD, Opportunity awaiting control for linear device 426 is judged shutdown signal S
SDBe activation or forbidden energy.In the embodiment of Fig. 2 and Fig. 3, when Opportunity awaiting control for linear device 426 is judged shutdown signal S
SDDuring for activation, Opportunity awaiting control for linear device 426 can see through signal En-STUP and En-PWM difference forbidden energy high-voltage starting circuit 414 and controller of pulse width modulation 428.Under disabled state, controller of pulse width modulation 428 can make drive circuit 430 close power switch SW constantly; No matter and operating power V
CCVoltage what are, high-voltage starting circuit 414 does not provide charging current to produce operating power V
CCTherefore, under disabled state, operating power V
CCBecause can not get high-voltage starting circuit 414 and auxiliary winding (auxiliary coil) L
ASo electric energy supplement is operating power V
CCMagnitude of voltage may reduce gradually with the power consumption of clock pulse generator 406 along with on-off controller 427.As operating power V
CCMagnitude of voltage low to a certain degree the time, on-off controller 427 and clock pulse generator 406 even may shut-down operation, but still keep closing power switch SW.
In one embodiment, judge shutdown signal S when Opportunity awaiting control for linear device 426
SDDuring for activation, Opportunity awaiting control for linear device 426 is forbidden energy high-voltage starting circuit 414 and controller of pulse width modulation 428 not only, and the also running of forbidden energy clock pulse generator 406 stops the output of clock signal.Shutdown signal S
SDDuring for activation, drive circuit 430 also can selectivity by forbidden energy, continue to close power switch SW.
Above so-called forbidden energy device is to make the Digital Logic output of this device maintain a fixing accurate position at least, also can be direct current (direct current) electric current that stops in this device.For instance, when clock pulse generator 406 during, be that clock pulse stops output at least by forbidden energy.When by forbidden energy, the DC current source in the clock pulse generator 406 also can be stopped supply of current.
When Opportunity awaiting control for linear device 426 is judged shutdown signal S
SDDuring for forbidden energy, high-voltage starting circuit 414 all is enabled with on-off controller 427, and looks operating power V
CCVoltage swing, on-off controller 427 may can begin operate as normal, the power controlling switch SW with clock pulse generator 406.
Fig. 4 A is an embodiment of the Opportunity awaiting control for linear device 426 among Fig. 3.Opportunity awaiting control for linear device 426a is connected to high-pressure side HV, by high voltage source V after the rectification
INPower supply.Current source 502 provides the power supply of logic determines device 506 and resistance 504.One silicon reference diode is connected between resistance 504 and the earth connection GND, in order to nip shutdown signal S
SDThe accurate position of ceiling voltage.Opportunity awaiting control for linear end SD is connected to resistance 504, makes shutdown signal S
SDPreset value be the accurate position of high voltage logic.The shutdown signal S that logic determines device 506 comes according to Opportunity awaiting control for linear end SD
SD, produce signal En-STUP and En-PWM.For example, as shutdown signal S
SDDuring for activation (the accurate position of high voltage logic), signal En-STUP and En-PWM are forbidden energy; As shutdown signal S
SDDuring for forbidden energy (the accurate position of low logic voltage), signal En-STUP and En-PWM are activation.
Fig. 4 B is an embodiment of the high-voltage starting circuit 414 among Fig. 3.High-voltage starting circuit 414a includes a controllable current source 508, is connected between high-pressure side HV and the power end VCC.Signal En-STUP delivers to the control end in controllable current source 508.When signal En-STUP was activation, the controllable current source 508 couples of power end VCC provided charging current.Detecting voltage device 510 is connected to the control end in power end VCC and controllable current source 508.After the voltage of power end VCC approximately exceeded a preset value, detecting voltage device 510 can cut out controllable current source 508, stopped power end VCC is charged.After the voltage of power end VCC was less than about this preset value greatly, detecting voltage device 510 can be opened controllable current source 508, and power end VCC is charged.
See also Fig. 2-4A and 4B.When power panel 30a is connected to AC power V
AC, but when also not receiving any motherboard, shutdown signal S
SDOBe positioned at the accurate position of low logic voltage, shutdown signal S
SDBe positioned at the accurate position of high voltage logic, so high-voltage starting circuit 414 is closed.Because do not have the supply of electric current, operating power V
CCVoltage will be maintained at a low level, controller of pulse width modulation 428 can't be operated with drive circuit 430 and open power switch SW.Whole power management integrated circuit 306a enters holding state, except the very little electric current of Opportunity awaiting control for linear device 426 losses, can be considered as not power consumption haply, so that the standby consumed power of power management integrated circuit 306a will be very is little.
For instance, be connected to AC power V as power panel 30a
ACAnd behind the motherboard, when motherboard needs electric energy, need forbidden energy shutdown signal S
SDO, be located at the accurate position of high voltage logic, cause shutdown signal S
SDBe positioned at the accurate position of low logic voltage.Therefore, high-voltage starting circuit 414 begins to start, to operating power V
CCCharging.As operating power V
CCVoltage high to a certain degree the time, controller of pulse width modulation 428 begins to open and close power switch SW with drive circuit 430, supplies electric energy simultaneously and gives operating power V
CCWith out-put supply V
OUTAnd detecting voltage device 510 can be in good time closes high-voltage starting circuit 414, allows operating power V
CCElectric energy only by auxiliary winding L
ASupply.
When power panel 30a is connected to AC power V
ACAnd behind the motherboard, when the motherboard identification does not need electric energy, can activation shutdown signal S
SDO, be located at the accurate position of low logic voltage, cause shutdown signal S
SDBe positioned at the accurate position of high voltage logic.Therefore, high-voltage starting circuit 414 is closed, and also compulsory the keeping of drive circuit 430 close power switch SW, and whole power management integrated circuit 306a enters the holding state that consumed power will be very little.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any the general technical staff of the technical field of the invention; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the accompanying Claim person of defining.
Claims (8)
1. a power management integrated circuit is characterized in that, includes:
One high-voltage starting circuit, by high voltage source power supply, in order in a start-up time, the supply electric energy gives an operating power;
One on-off controller is controlled a power switch, uses the store energy and the release of control one energy conversion unit; And
One Opportunity awaiting control for linear device, by this high voltage source power supply, in order to receive a shutdown signal, when this shutdown signal is activation, this this high-voltage starting circuit of Opportunity awaiting control for linear device forbidden energy and this on-off controller, make this high-voltage starting circuit not supply electric energy and give this operating power, and this on-off controller continues to cut out this power switch.
2. power management integrated circuit according to claim 1 is characterized in that, this shutdown signal is activation when the accurate position of a high voltage logic.
3. power management integrated circuit according to claim 1 is characterized in that, this on-off controller includes:
One drive circuit is in order to drive this power switch; And
One pulse width modulation circuit is in order to control the opening time of this power switch;
Wherein, when this shutdown signal was activation, this Opportunity awaiting control for linear device was fixed an output of this pulse width modulation circuit, made this drive circuit close this power switch.
4. power management integrated circuit according to claim 3 is characterized in that, also includes:
One clock pulse generator gives this pulse width modulation circuit in order to produce a clock pulse signal.
5. power management integrated circuit according to claim 3 is characterized in that, this high-voltage starting circuit includes:
One controllable current source couples between this high voltage source and this operating power, has a control end; And
One detecting voltage device is coupled to this control end and this operating power, when the voltage of this operating power is higher than a preset value, closes this controllable current source.
6. a method for managing power supply is characterized in that, includes:
One power management integrated circuit is provided, is coupled to a high voltage source, the store energy and the release of an energy conversion unit is controlled in the open and close that can see through a power switch, and wherein, this power management integrated circuit has a high voltage startup function;
Receive a shutdown signal;
When this shutdown signal is activation, this high voltage startup function of forbidden energy, and keep and close this power switch; And
When this shutdown signal is forbidden energy, this high voltage startup function of activation, and control this power switch, make this energy conversion unit storage and release energy.
7. method for managing power supply according to claim 6 is characterized in that, this shutdown signal is activation when the accurate position of a high voltage logic, is forbidden energy when the accurate position of a low logic voltage.
8. method for managing power supply according to claim 6 is characterized in that, also includes:
Detect the voltage of an operating power;
When the voltage of this operating power roughly is lower than a preset value, this high voltage startup function of activation; And
When the voltage of this operating power roughly is higher than this preset value, this high voltage startup function of forbidden energy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101104620A CN102142773A (en) | 2010-02-03 | 2010-02-03 | Power management integrated circuit and power management method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101104620A CN102142773A (en) | 2010-02-03 | 2010-02-03 | Power management integrated circuit and power management method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102142773A true CN102142773A (en) | 2011-08-03 |
Family
ID=44410070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101104620A Pending CN102142773A (en) | 2010-02-03 | 2010-02-03 | Power management integrated circuit and power management method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023337A (en) * | 2013-01-11 | 2013-04-03 | 聚辰半导体(上海)有限公司 | Power circuit of switching power converter |
| CN103326564A (en) * | 2012-03-20 | 2013-09-25 | 通嘉科技股份有限公司 | Control circuit for reducing touch current of a power converter and operation method thereof |
| CN105811747A (en) * | 2016-05-17 | 2016-07-27 | 无锡芯朋微电子股份有限公司 | High-voltage power supply system with enable control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319940A (en) * | 2000-01-31 | 2001-10-31 | 索尼株式会社 | Switch type power source unit |
| US20100020575A1 (en) * | 2008-07-28 | 2010-01-28 | Sanken Electric Co., Ltd. | Switching power supply device |
-
2010
- 2010-02-03 CN CN2010101104620A patent/CN102142773A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1319940A (en) * | 2000-01-31 | 2001-10-31 | 索尼株式会社 | Switch type power source unit |
| US20100020575A1 (en) * | 2008-07-28 | 2010-01-28 | Sanken Electric Co., Ltd. | Switching power supply device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326564A (en) * | 2012-03-20 | 2013-09-25 | 通嘉科技股份有限公司 | Control circuit for reducing touch current of a power converter and operation method thereof |
| CN103326564B (en) * | 2012-03-20 | 2015-10-28 | 通嘉科技股份有限公司 | In order to reduce control circuit and the method for operation thereof of the pick-up current of power supply changeover device |
| CN103023337A (en) * | 2013-01-11 | 2013-04-03 | 聚辰半导体(上海)有限公司 | Power circuit of switching power converter |
| CN103023337B (en) * | 2013-01-11 | 2015-07-22 | 聚辰半导体(上海)有限公司 | Power circuit of switching power converter |
| CN105811747A (en) * | 2016-05-17 | 2016-07-27 | 无锡芯朋微电子股份有限公司 | High-voltage power supply system with enable control |
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Application publication date: 20110803 |