CN104143855A - Power supply unit capable of achieving zero stand-by power consumption - Google Patents
Power supply unit capable of achieving zero stand-by power consumption Download PDFInfo
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- CN104143855A CN104143855A CN201310164012.3A CN201310164012A CN104143855A CN 104143855 A CN104143855 A CN 104143855A CN 201310164012 A CN201310164012 A CN 201310164012A CN 104143855 A CN104143855 A CN 104143855A
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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
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The invention discloses a power supply unit. A carrier capturing device is adopted to receive a carrier of a single frequency band or various different frequency bands such as GSM900MHz, GSM1800MHz, GSM900MHz and 1800MHZ, the energy obtained by converting the carrier is stored in a capacitor or a chargeable battery, and therefore under a stand-by mode, the energy obtained through conversion of the carrier capturing device is utilized for supplying power to an MCU to maintain the normal stand-by function, and zero stand-by power consumption is achieved. Under the stand-by mode, if the space is not provided with enough carrier energy, the power supply unit can start a stand-by power converter to enable the stand-by voltage obtained through conversion of AC power source input to supply power to the MCU to maintain the normal stand-by function.
Description
Technical field
The invention relates to a kind of power supply unit, and relate to especially a kind of power supply unit of realizing zero stand-by power consumption.
Background technology
Refer to Fig. 1, the circuit block diagram that Fig. 1 is a kind of existing power supply unit.Power supply unit 1 is applied to LCD TV, it comprises electromagnetic interference (electromagnetic interference, EMI) filter 11, bridge rectifier 12, electrolytic capacitor 13, power factor corrector (power factor corrector, PFC) 14, main power source transducer 15, standby power transducer 16 and power switch 17.Wherein, main power source transducer 15 is in LCD TV during in normal mode of operation, output principal voltage Vm1(is as 24V) with the backlight drive circuit of the brilliant TV of feeding of powering, and output principal voltage Vm2(is as 12V) with loudspeaker and the liquid crystal panel drive circuit of the brilliant TV of feeding of powering.Standby power transducer 16 is for there being interchange (alternating-current, AC) when power supply is inputted, no matter LCD TV is in normal mode of operation or standby mode, all can export standby voltage Vsb1(as 5V) with the microcontroller (microcontroller unit, MCU) on the mainboard of the brilliant TV of feeding of powering.
When after AC power supplies input, standby power transducer 16 can be exported standby voltage Vsb1 immediately to power to MCU, and output internal supply voltage Vcc, now LCD TV is in standby mode, only leave part outside function and operate with low power condition, the idle function of order and the I/O signal etc. of being assigned by remote controller etc. as MCU detecting user.In the time that MCU detects the order (as power supply of remote controller button is pressed) of unlatching TV/power supply, effective (as high level) electric power starting signal PS_ON of MCU output is to control power switch 17 conductings, and then transmit supply power voltage Vcc to power to the controller in PFC 14 and main power source transducer 15, now main power source transducer 15 starts action, output principal voltage Vm1 and Vm2 to backlight drive circuit, loudspeaker and liquid crystal panel drive circuit, make LCD TV enter normal mode of operation display frame with power supply.When LCD TV is during in normal mode of operation, MCU still can detect order and the detecting I/O signal etc. that user assigns by remote controller etc., detect the order (as power supply of remote controller button is pressed again) of closing television/power supply once MCU, (as low level) electric power starting signal PS_ON that MCU output is invalid disconnects to control power switch 17, and then no longer transmit supply power voltage Vcc, now main power source transducer 15 no longer moves, make LCD TV in standby mode and without picture disply, but standby power transducer 16 still can be exported standby voltage Vsb1 and maintain normal idle function with power supply to MCU.
Due to energy shortage, the relevant energy conservation criteria of the numerous and confused proposition of World Environment Organization, for the requirement of household appliances (as LCD TV), mainly comprise the restriction of power loss (calling stand-by power consumption in the following text) under the restriction that under normal mode of operation, entirety consumes energy and standby mode.Wherein the restriction of stand-by power consumption is down to current 0.5W by 1W originally, next can continue to be down to 0.3W or 0.1W.In order to meet the restriction of various specifications, except constantly reducing MCU stand-by power consumption, promote conversion efficiency, reducing line loss, also there is the practice that proposes to access peripheral device power supply.These improve in way, to promote conversion efficiency, reduction line loss as example, in the time that power supply unit is exported with utmost point low-power under standby mode, because power output all too is low, assembly loss when circuit action has approached the demand that is even greater than output, this is that assemblies physical characteristic causes, and the amplitude that can improve is limited.Taking the way that accesses peripheral device power supply as example, in the time that power supply unit enters standby mode, required power supply is supplied with through external connection line and is turned by peripheral device and provide, as possessing under idle function, desktop PC main frame etc. can stablize the device that power supply is provided, this way has limited its application, and in fact just stand-by power consumption is married again on peripheral device.
Summary of the invention
In view of this, object of the present invention, proposing a kind of power supply unit, does not need to access peripheral device power supply and can realize zero standby power.
For achieving the above object or other object, the present invention proposes a kind of power supply unit, and it comprises standby power transducer, carrier wave capture device, capacitor and diode.Standby power transducer is coupled to microcontroller (MCU), and under normal mode of operation, standby power transducer is exported the first standby voltage to power to MCU.Carrier wave capture device receives the carrier wave of at least one frequency range, and converts described at least one carrier wave at least one direct current (direct-current, DC) electric current.Capacitor has first end and the second end, and its first end is coupled to carrier wave capture device, its second end ground connection, and capacitor receives described at least one DC electric current and produce output voltage on its first end.Diode has anode tap and cathode terminal, and its anode tap is coupled to the first end of capacitor, and its cathode terminal is coupled to MCU, and the anode tap of diode receives output voltage and exports the second standby voltage at its cathode terminal.Wherein, in the time entering standby mode by normal mode of operation, MCU first detects the second standby voltage and whether is more than or equal to first threshold, if the second standby voltage is more than or equal to first threshold, MCU output control signal turning off standby power supply changeover device, make entering after standby mode, change by the second standby voltage and power to MCU; If the second standby voltage is less than first threshold, entering after standby mode, still powered to MCU by the first standby voltage.
In one embodiment, under standby mode and while powering to MCU by the second standby voltage, MCU detects the second standby voltage and whether is less than Second Threshold, if the second standby voltage is less than Second Threshold, MCU output control signal starts standby power transducer, recovers to be powered to MCU by the first standby voltage; If the second standby voltage is more than or equal to Second Threshold, still powered to MCU by the second standby voltage, wherein, first threshold is more than or equal to Second Threshold.
In one embodiment, under standby mode and while powering to MCU by the first standby voltage, MCU detects the second standby voltage and whether is more than or equal to first threshold, if the second standby voltage is more than or equal to first threshold, MCU output control signal turning off standby power supply changeover device, changes by the second standby voltage and powers to MCU; If the second standby voltage is less than first threshold, still powered to MCU by the first standby voltage.
In one embodiment, in the time entering normal mode of operation by standby mode, if be to be powered to MCU by the second standby voltage under standby mode, MCU output control signal starts standby power transducer, make to enter after normal mode of operation, recover to be powered to MCU by the first standby voltage.
The present invention separately proposes a kind of power supply unit, and it comprises standby power transducer, carrier wave capture device, chargeable battery, DC to DC transducer, capacitor, normally closed (normally closed) relay, switch and delayer.Standby power transducer is coupled to MCU, and under normal mode of operation, standby power transducer is exported the first standby voltage to power to MCU.Carrier wave capture device receives the carrier wave of at least one frequency range, and converts described at least one carrier wave at least one DC electric current.Chargeable battery has anode and negative terminal, and its anode is coupled to carrier wave capture device, its negativing ending grounding, and chargeable battery receives the charging of described at least one DC electric current and produce output voltage on its anode.DC to DC transducer has power input and power output end, its power input is coupled to the anode of chargeable battery, its power output end is coupled to MCU, and the power input of DC to DC transducer receives output voltage and exports the second standby voltage at its power output end.Capacitor has first end and the second end, and its first end is coupled to the power output end of DC to DC transducer, its second end ground connection.Normally closed relay is coupled to interchange (AC) power supply of input power supply.Switch is coupled to normally closed relay, and switch control normally closed relay cuts off or connect AC power supplies input.Delayer is coupled to switch and MCU, is less than the retention time of capacitor (hold-up time) time of delay of delayer.Wherein, in the time entering standby mode by normal mode of operation, MCU output control signal starts DC to DC transducer and converts output voltage to second standby voltage to power to MCU, delayer makes control signal after the second standby voltage is set up, just deliver to switch and cuts off AC power supplies input to control normally closed relay, and then turning off standby power supply changeover device to be to stop exporting the first standby voltage, make to be powered to MCU by the second standby voltage entering after standby mode.
In one embodiment, under standby mode and while powering to MCU by the second standby voltage, MCU detects the second standby voltage and whether is less than threshold value, if the second standby voltage is less than threshold value, MCU output control signal is closed DC to DC transducer to stop exporting the second standby voltage, delayer makes control signal before the second standby voltage not yet lost efficacy, deliver to switch and connects AC power supplies input to control normally closed relay, and then starts standby power transducer to export the first standby voltage to power to MCU; If the second standby voltage is more than or equal to threshold value, still powered to MCU by the second standby voltage.
In one embodiment, in the time entering normal mode of operation by standby mode, powered to MCU by the second standby voltage if under standby mode be, MCU output control signal is closed DC to DC transducer to stop exporting the second standby voltage, delayer makes control signal before the second standby voltage not yet lost efficacy, deliver to switch and connects AC power supplies input to control normally closed relay, and then starts standby power transducer to export the first standby voltage to power to MCU.
In one embodiment, normally closed relay is pulse-triggered latching relay.
In one embodiment, carrier wave capture device comprises that at least one carrier wave reception antenna and at least one DC turn DC transducer.Described at least one carrier wave reception antenna receives described at least one carrier wave, and converts described at least one carrier wave at least one DC voltage.Described at least one DC turns DC transducer and is coupled to described at least one carrier wave reception antenna, and described at least one DC turns DC transducer described at least one DC voltage is converted to described at least one DC electric current.
In one embodiment, described at least one carrier wave reception antenna comprises that two carrier wave reception antennas are to receive respectively the carrier wave of Global System for Mobile Communication (global system for mobile communications, GSM) 900MHz and 1800MHz frequency range.Described at least one DC turns DC transducer and comprises that two DC turn DC transducer to be coupled to respectively described two carrier wave reception antennas.
Power supply unit of the present invention is because of the single frequency band in employing carrier wave capture device reception space or the carrier wave (as GSM 900MHz or GSM 1800MHz or GSM 900MHz and 1800MHz) of multiple different frequency ranges, and the energy storage of being changed gained is in capacitor or chargeable battery, therefore can enter after standby mode, change by the energy of carrier wave capture device conversion gained and power to MCU to maintain normal idle function, realized zero stand-by power consumption.And under standby mode, if while not having enough carrier energies in space, power supply unit can start standby power transducer and will be powered to MCU to maintain normal idle function by the standby voltage of AC power supplies input conversion gained.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate appended graphicly, be described in detail below.
Brief description of the drawings
Fig. 1 is a kind of circuit block diagram of existing power supply unit.
Fig. 2 is the circuit block diagram of an embodiment of power supply unit of the present invention.
Fig. 3 is the flow chart of the control method of power supply unit shown in Fig. 2.
Fig. 4 is the circuit block diagram of another embodiment of power supply unit of the present invention.
Fig. 5 is the flow chart of the control method of power supply unit shown in Fig. 4.
Label declaration
1,2,3: power supply unit
11:EMI filter
12: bridge rectifier
13: electrolytic capacitor
14：PFC
15: main power source transducer
16,16 ': standby power transducer
17: power switch
21: carrier wave capture device
211,212: carrier wave reception antenna
213,214:DC turns DC transducer
22: capacitor
23: diode
32: chargeable battery
33:DC to DC transducer
34: capacitor
35: delayer
36: switch
37: normally closed relay
Vm1, Vm2: principal voltage
Vsb1: the first standby voltage
Vsb2: the second standby voltage
Vcc: supply power voltage
Vo: output voltage
V1, V2:DC voltage
I1, I2:DC electric current
PS_ON: electric power starting signal
COM: control signal
S1, S2: carrier wave.
Embodiment
Along with Information technology vigorous growth, in the environment of human survival, be flooded with the carrier wave of different frequency range, as wireless network, broadcasting channel, mobile phone communication system etc.These carrier waves are the performance of different-energy, after being changed, can obtain micro-energy, and these micro-energy required energy while can be used as household appliances (as LCD TV) standby.At present, the scope that mobile phone communication system signal is contained is the most wide, take Taiwan as example, Global System for Mobile Communication (GSM) is the most universal, it mainly comprises 900MHz and 1800MHz two separate frequency bands, wherein, 900MHz wavelength length, long transmission distance, penetration power is poor, be applicable to being used in spacious region, and 1800MHz wavelength is shorter, transmission range is near, penetration power is strong, be applicable to being used in High density residential district, the mobile phone communication system of these two kinds of frequency ranges of simultaneously arranging in pairs or groups is drawn on the strong points to offset the weaknesses down and can be contained extremely wide scope.
Refer to Fig. 2, the circuit block diagram of the embodiment that Fig. 2 is power supply unit of the present invention.Power supply unit 2 of the present invention is applied to LCD TV, but is not limited only to this, and it also can be applicable to other household appliances.Power supply unit 2 of the present invention is on existing power supply unit 1 framework shown in Fig. 1, to add carrier wave capture device 21 and make some circuit increase and decrease and amendments, therefore power supply unit 2 comprises electromagnetic interface filter 11, bridge rectifier 12, electrolytic capacitor 13, PFC 14, main power source transducer 15, standby power transducer 16 ', power switch 17, carrier wave capture device 21, capacitor 22 and diode 23.Wherein, standby power transducer 16 ' and standby power transducer 16 differences shown in Fig. 1 are that it also can accept the control of the control signal COM of MCU output.Standby power transducer 16 ' is under normal mode of operation, and output the first standby voltage Vsb1 is to power to MCU.Carrier wave capture device 21 receives carrier wave S1 and the S2 of two different frequency ranges in space, and converts respectively carrier wave S1 and S2 to DC electric current I 1 and I2.Capacitor 22 has first end and the second end, and its first end is coupled to carrier wave capture device 21, its second end ground connection, and capacitor 22 receives DC electric current I 1 and I2 and on its first end, produces output voltage V o.Diode 23 has anode tap and cathode terminal, and its anode tap is coupled to the first end of capacitor 22, and its cathode terminal is coupled to MCU, and the anode tap of diode 23 receives output voltage V o and exports the second standby voltage Vsb2 at its cathode terminal.
In the present embodiment, carrier wave capture device 21 comprise two carrier wave reception antennas 211 and 212 and two DC turn DC transducer 213 and 214.Carrier wave reception antenna 211 is for receiving the carrier wave S1 of GSM 900MHz frequency range and converting thereof into DC voltage V1, and carrier wave reception antenna 212 is for receiving the carrier wave S2 of GSM 1800MHz frequency range and converting thereof into DC voltage V2.DC turns DC transducer 213 and is coupled to carrier wave reception antenna 211 to receive DC voltage V1 be converted into DC electric current I 1, and DC turns DC transducer 214 and is coupled to carrier wave reception antenna 212 to receive DC voltage V2 and to be converted into DC electric current I 2.It should be noted that, DC turns DC transducer 213 and 214 can be according to the demand of output voltage V o or the second standby voltage Vsb2, adopt step-down (buck) transducer or (boost) transducer that boosts any, but converter output end must present current-mode, the energy that two carrier wave reception antennas 211 and 212 could be received is by DC electric current I 1 and the whole capacitor 22 that enters rear end of I2 remittance.Carrier wave capture device 21 is long-time action component, is not subject to the impact of LCD TV in normal mode of operation or standby mode, and the carrier wave in round-the-clock reception space the energy storage of being changed gained are in capacitor 22.But, the present embodiment is not in order to limit the present invention, for example, carrier wave capture device can only include a carrier wave reception antenna 212 and a DC turns DC transducer 214, wherein, carrier wave reception antenna 212 is for receiving the carrier wave S2 of GSM 1800MHz frequency range and converting thereof into DC voltage V2, DC turns DC transducer 214 and is coupled to carrier wave reception antenna 212 to receive DC voltage V2 be converted into DC electric current I 2, and the power supply unit with this carrier wave capture device is applicable to being applied in the household appliances of High density residential district.
Please be simultaneously referring to Fig. 2 and Fig. 3, Fig. 3 is the flow chart of the control method of power supply unit 2 shown in Fig. 2.Under normal mode of operation, the main power source transducer 15 of power supply unit 2 is exported principal voltage Vm1 and Vm2 display frame to power to backlight drive circuit, loudspeaker and liquid crystal panel drive circuit, and standby power transducer 16 ' output the first standby voltage Vsb1 is to power to MCU(S11).When MCU detects user while assigning the order (S12) of closing television/power supply by remote controller etc., to enter standby mode by normal mode of operation, MCU exports invalid electric power starting signal PS_ON, main power source transducer 15 is no longer moved and without picture disply, but standby power transducer 16 ' still can export the first standby voltage Vsb1 with power supply to MCU(S13).Then, MCU can first detect the second standby voltage Vsb2 and whether is more than or equal to first threshold Vt1(S14).If the second standby voltage Vsb2 is more than or equal to first threshold Vt1, represent that the energy being stored in capacitor 22 is enough, therefore MCU output control signal COM turning off standby power supply changeover device 16 ' is to stop exporting the first standby voltage Vsb1(S15), make entering after standby mode, change by the second standby voltage Vsb2 and power to MCU, realized zero stand-by power consumption (S16).If the second standby voltage Vsb2 is less than first threshold Vt1, represent to be stored in energy in capacitor 22 not enough,, therefore entering after standby mode, still powered to MCU(S17 by the first standby voltage Vsb1).
Under standby mode and by the second standby voltage Vsb2, power to MCU(S16) time, MCU detects the second standby voltage Vsb2 and whether is less than Second Threshold Vt2(S21).If the second standby voltage Vsb2 is less than Second Threshold Vt2, represent to be stored in energy in capacitor 22 not enough, therefore MCU output control signal COM starts standby power transducer 16 ' to export the first standby voltage Vsb1(S22), therefore recover to be powered to MCU(S17 by the first standby voltage Vsb1).If the second standby voltage Vsb2 is more than or equal to Second Threshold Vt2, represent to be stored in energy in capacitor 22 still enough, therefore still powered to MCU(S16 by the second standby voltage Vsb2).In one embodiment, the first standby voltage Vsb1 rated value is 5V, and first threshold Vt1 can be set as 4.2V, and Second Threshold Vt2 can be set as 3.8V.
Under standby mode and by the first standby voltage Vsb1, power to MCU(S17) time, MCU detects the second standby voltage Vsb2 and whether is more than or equal to first threshold Vt1(S31).If the second standby voltage Vsb2 is more than or equal to first threshold Vt1, represent to be stored in energy in capacitor 22 enough, therefore MCU output control signal COM turning off standby power supply changeover device 16 ' is to stop exporting the first standby voltage Vsb1(S32), change by the second standby voltage Vsb2 and power to MCU(S16).If the second standby voltage Vsb2 is less than first threshold Vt1, represent to be stored in energy in capacitor 22 still not enough, therefore still powered to MCU(S17 by the first standby voltage Vsb1).
In addition, when MCU detects user while assigning the order of unlatching TV/power supply by remote controller etc., now will enter normal mode of operation by standby mode, powered to MCU by the second standby voltage Vsb2 if under standby mode be, MCU output control signal COM starts standby power transducer 16 ' to export the first standby voltage Vsb1, make to enter after normal mode of operation, recover to be powered to MCU by the first standby voltage Vsb1.In the time entering normal mode of operation by standby mode, if be to be powered to MCU by the first standby voltage Vsb1 under standby mode, enter after normal mode of operation, still powered to MCU by the first standby voltage Vsb1.
Refer to Fig. 4, Fig. 4 is that the present invention is the circuit block diagram of another embodiment of power supply unit.Power supply unit 3 of the present invention can be applicable to the household appliances such as LCD TV.Power supply unit 3 of the present invention is on existing power supply unit 1 framework shown in Fig. 1, to add carrier wave capture device 21 and make some circuit increase and decrease and amendments, therefore power supply unit 3 comprises electromagnetic interface filter 11, bridge rectifier 12, electrolytic capacitor 13, PFC 14, main power source transducer 15, standby power transducer 16, power switch 17, carrier wave capture device 21, chargeable battery 32, DC to DC transducer 33, capacitor 34, delayer 35, switch 36 and normally closed relay 37.With power supply unit 2 shown in Fig. 2 relatively under, the energy of the carrier wave gained in carrier wave capture device 21 transformed spaces is stored in chargeable battery 32 by power supply unit 3 instead, this be because chargeable battery can carry out for a long time electric power storage and can store more electric charge or energy.
Standby power transducer 16 is under normal mode of operation, and output the first standby voltage Vsb1 is to power to MCU.Carrier wave capture device 21 receives carrier wave S1 and the S2 of two different frequency ranges in space, and converts respectively carrier wave S1 and S2 to DC electric current I 1 and I2.Chargeable battery 32 has anode and negative terminal, and its anode is coupled to carrier wave capture device 21, its negativing ending grounding, and chargeable battery 32 receives the charging of DC electric current I 1 and I2 and on its anode, produces output voltage V o.DC to DC transducer 33 has power input and power output end, its power input is coupled to the anode of chargeable battery 32, its power output end is coupled to MCU, and the power input of DC to DC transducer 33 receives output voltage V o and exports the second standby voltage Vsb2 at its power output end.Capacitor 34 has first end and the second end, and its first end is coupled to the power output end of DC to DC transducer 33, its second end ground connection.Normally closed relay 37 is coupled to the AC power supplies of input power supply.Switch 36 is coupled to normally closed relay 37, and switch 36 is controlled normally closed relay 37 and cut off or connect AC power supplies input.Delayer 35 is coupled to switch 36 and MCU.It should be noted that, the output voltage V o of general chargeable battery 32 can be higher than the second standby voltage Vsb2, this is because higher voltage can store more electric charge or energy relatively, therefore it must be boost converter that the DC adopting in carrier wave capture device 21 turns DC transducer 213 and 214, and DC to DC transducer 33 must adopt step-down controller.
Please be simultaneously referring to Fig. 4 and Fig. 5, Fig. 5 is the flow chart of the control method of power supply unit 3 shown in Fig. 4.Under normal mode of operation, the main power source transducer 15 of power supply unit 3 is exported principal voltage Vm1 and Vm2 display frame to power to backlight drive circuit, loudspeaker and liquid crystal panel drive circuit, and standby power transducer 16 is exported the first standby voltage Vsb1 to power to MCU(S41).When MCU detects user while assigning the order (S42) of closing television/power supply by remote controller etc., to enter standby mode by normal mode of operation, MCU exports invalid electric power starting signal PS_ON, main power source transducer 15 is no longer moved and without picture disply (S43), MCU also export simultaneously control signal COM start DC to DC transducer 33 by output voltage V o convert to the second standby voltage Vsb2 with power supply to MCU(S44).The control signal COM of MCU output also can deliver to delayer 35, delayer 35 makes control signal COM after the second standby voltage Vsb2 sets up, just deliver to switch 36 and cuts off AC power supplies input to control normally closed relay 37, and then turning off standby power supply changeover device 16 to be to stop exporting the first standby voltage Vsb1, make to be powered to MCU(S45 by the second standby voltage Vsb2 entering after standby mode).
Under standby mode and by the second standby voltage Vsb2, power to MCU(S45) time, MCU detects the second standby voltage Vsb2 and whether is less than threshold value Vt3(S51).If the second standby voltage Vsb2 is less than threshold value Vt3, represent to be stored in energy in chargeable battery 32 not enough, therefore MCU output control signal COM closes DC to DC transducer 33 to stop exporting the second standby voltage Vsb2(S52).The control signal COM of MCU output also can deliver to delayer 35, delayer 35 makes control signal COM before the second standby voltage Vsb2 not yet lost efficacy, deliver to switch 36 and connects AC power supplies input to control normally closed relay 37, and then starts standby power transducer 16 to export the first standby voltage Vsb1 to power to MCU(S53).If the second standby voltage Vsb2 is more than or equal to threshold value Vt3, represent to be stored in energy in chargeable battery 32 still enough, therefore still powered to MCU(S51 by the second standby voltage Vsb2).It should be noted that, must be less than the retention time of capacitor 34 time of delay of delayer 35, wherein, the retention time of capacitor 34 refers to: drop to a ratio of rated voltage of the second standby voltage Vsb2 to the two ends cross-pressure (the second standby voltage Vsb2) of capacitor 34 in the time that DC to DC transducer 33 is closed time during this period of time, and the ratio of the rated voltage of described the second standby voltage Vsb2 general desirable its no longer enough drive and power to MCU(or claim its inefficacy) critical voltage.For example, if the rated voltage of the second standby voltage Vsb2 is 5V, and it no longer enough drives and powers to the critical voltage of MCU is that 3.8V(is the Second Threshold Vt2 of 3.8V in precedent), described ratio is about 25%, and the time that the retention time of capacitor 34 is the two ends cross-pressure to capacitor 34 in the time that DC to DC transducer 33 is closed (the second standby voltage Vsb2) while dropping to 3.8V.Thus, after DC to DC transducer 33 is closed, capacitor 34 can make the second standby voltage Vsb2 voltage within one period of retention time can not drop to inefficacy, now MCU is still by the second standby voltage Vsb2 and powers, and delayer 35 can be delivered to control signal COM switch 36 and connects AC power supplies input to control normally closed relay 37 within this period of retention time, and then start standby power transducer 16 and take over the second standby voltage Vsb2 that is about to lose efficacy and power to MCU to export the first standby voltage Vsb1.
In addition, when MCU detects user while assigning the order of unlatching TV/power supply by remote controller etc., now will enter normal mode of operation by standby mode, powered to MCU by the second standby voltage Vsb2 if under standby mode be, MCU output control signal COM closes DC to DC transducer 33 to stop exporting the second standby voltage Vsb2, delayer 35 makes control signal COM before the second standby voltage Vsb2 not yet lost efficacy, deliver to switch 36 and connects AC power supplies input to control normally closed relay 37, and then start standby power transducer 16 to export the first standby voltage Vsb1 to power to MCU.In the time entering normal mode of operation by standby mode, if be to be powered to MCU by the first standby voltage Vsb1 under standby mode, enter after normal mode of operation, still powered to MCU by the first standby voltage Vsb1.
In one embodiment, normally closed relay 37 can use pulse-triggered latching relay, pulse-triggered latching relay can more save by carrier wave capture device 21 change rear stored and energy.This is because pulse-triggered latching relay is being subject to remaining on certain state after the of short duration triggering of switch, as cut off and connect wherein a kind of state of AC power supplies, if and to remain on unlike normally closed relay 37 the AC power supplies state connected, must provide energy to switch 36 to allow switch 36 be controlled normally closed relay 37 always and remain on the AC power supplies state of connecting.
Although the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion with claims.
Claims (10)
1. a power supply unit, comprising:
One standby power transducer, is coupled to a microcontroller, and under a normal mode of operation, this standby power transducer output one first standby voltage is to power to this microcontroller;
One carrier wave capture device, receives the carrier wave of at least one frequency range, and converts this at least one carrier wave at least one direct current;
One capacitor, has a first end and one second end, and its first end is coupled to this carrier wave capture device, its second end ground connection, and this capacitor receives this at least one direct current and on its first end, produces an output voltage; And
One diode, has an anode tap and a cathode terminal, and its anode tap is coupled to the first end of this capacitor, and its cathode terminal is coupled to this microcontroller, and the anode tap of this diode receives this output voltage and exports one second standby voltage at its cathode terminal;
Wherein, in the time entering a standby mode by this normal mode of operation, this microcontroller is first detected this second standby voltage and whether is more than or equal to a first threshold, if this second standby voltage is more than or equal to this first threshold, this microcontroller exports a control signal and cuts out this standby power transducer, make entering after this standby mode, change by this second standby voltage and power to this microcontroller; If this second standby voltage is less than this first threshold, entering after this standby mode, still powered to this microcontroller by this first standby voltage.
2. power supply unit according to claim 1, wherein, under this standby mode and while powering to this microcontroller by this second standby voltage, this microcontroller is detected this second standby voltage and whether is less than a Second Threshold, if this second standby voltage is less than this Second Threshold, this microcontroller is exported this control signal and is started this standby power transducer, recovers to be powered to this microcontroller by this first standby voltage; If this second standby voltage is more than or equal to this Second Threshold, still powered to this microcontroller by this second standby voltage, wherein, this first threshold is more than or equal to this Second Threshold.
3. power supply unit according to claim 1, wherein, under this standby mode and while powering to this microcontroller by this first standby voltage, this microcontroller is detected this second standby voltage and whether is more than or equal to this first threshold, if this second standby voltage is more than or equal to this first threshold, this microcontroller exports this control signal and cuts out this standby power transducer, changes by this second standby voltage and powers to this microcontroller; If this second standby voltage is less than this first threshold, still powered to this microcontroller by this first standby voltage.
4. power supply unit according to claim 1, wherein, in the time entering this normal mode of operation by this standby mode, powered to this microcontroller by this second standby voltage if under this standby mode be, this microcontroller is exported this control signal and is started this standby power transducer, make to enter after this normal mode of operation, recover to be powered to this microcontroller by this first standby voltage.
5. a power supply unit, comprising:
One standby power transducer, is coupled to a microcontroller, and under a normal mode of operation, this standby power transducer output one first standby voltage is to power to this microcontroller;
One carrier wave capture device, receives the carrier wave of at least one frequency range, and converts this at least one carrier wave at least one direct current;
One chargeable battery, has an anode and a negative terminal, and its anode is coupled to this carrier wave capture device, its negativing ending grounding, and this chargeable battery receives the charging of this at least one direct current and on its anode, produces an output voltage;
One DC-DC converter, there is a power input and a power output end, its power input is coupled to the anode of this chargeable battery, its power output end is coupled to this microcontroller, and the power input of this DC-DC converter receives this output voltage and exports one second standby voltage at its power output end;
One capacitor, has a first end and one second end, and its first end is coupled to the power output end of this DC-DC converter, its second end ground connection;
One normally closed relay, is coupled to the AC power of this power supply unit of input;
One switch, is coupled to this normally closed relay, and this normally closed relay of this switch control cuts off or connect this AC power input; And
One delayer, is coupled to this switch and this microcontroller, is less than the retention time of this capacitor the time of delay of this delayer;
Wherein, in the time entering a standby mode by this normal mode of operation, this microcontroller export this control signal start this DC-DC converter by this output voltage convert to this second standby voltage with power supply to this microcontroller, this delayer makes this control signal after this second standby voltage is set up, just deliver to this switch and cuts off this AC power input to control this normally closed relay, and then close this standby power transducer to stop exporting this first standby voltage, make to be powered to this microcontroller by this second standby voltage entering after this standby mode.
6. power supply unit according to claim 5, wherein, under this standby mode and while powering to this microcontroller by this second standby voltage, this microcontroller is detected this second standby voltage and whether is less than a threshold value, if this second standby voltage is less than this threshold value, this microcontroller exports this control signal and cuts out this DC-DC converter to stop exporting this second standby voltage, this delayer makes this control signal before this second standby voltage not yet lost efficacy, deliver to this switch and connects this AC power input to control this normally closed relay, and then start this standby power transducer to export this first standby voltage to power to this microcontroller, if this second standby voltage is more than or equal to this threshold value, still powered to this microcontroller by this second standby voltage.
7. power supply unit according to claim 5, wherein, in the time entering this normal mode of operation by this standby mode, powered to this microcontroller by this second standby voltage if under this standby mode be, this microcontroller exports this control signal and cuts out this DC-DC converter to stop exporting this second standby voltage, this delayer makes this control signal before this second standby voltage not yet lost efficacy, deliver to this switch and connects this AC power input to control this normally closed relay, and then start this standby power transducer to export this first standby voltage to power to this microcontroller.
8. power supply unit according to claim 5, wherein, this normally closed relay is a pulse-triggered latching relay.
9. according to the power supply unit described in arbitrary claim in claim 1 to 8, wherein, this carrier wave capture device comprises at least one carrier wave reception antenna and at least one DC-DC transducer, this at least one carrier wave reception antenna receives this at least one carrier wave, and convert this at least one carrier wave at least one direct voltage, this at least one DC-DC transducer is coupled to this at least one carrier wave reception antenna, and this at least one direct voltage is converted to this at least one direct current by this at least one DC-DC transducer.
10. power supply unit according to claim 9, wherein, this at least one carrier wave reception antenna comprises that two carrier wave reception antennas are to receive respectively the carrier wave of Global System for Mobile Communication 900MHz and 1800MHz frequency range, and this at least one DC-DC transducer comprises that two DC-DC transducers are to be coupled to respectively this two carrier waves reception antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164012.3A CN104143855A (en) | 2013-05-07 | 2013-05-07 | Power supply unit capable of achieving zero stand-by power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310164012.3A CN104143855A (en) | 2013-05-07 | 2013-05-07 | Power supply unit capable of achieving zero stand-by power consumption |
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| Publication Number | Publication Date |
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| CN104143855A true CN104143855A (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310164012.3A Pending CN104143855A (en) | 2013-05-07 | 2013-05-07 | Power supply unit capable of achieving zero stand-by power consumption |
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| CN106787739A (en) * | 2017-03-28 | 2017-05-31 | 深圳Tcl新技术有限公司 | Produce the power-supplying circuit and power circuit of sequential |
| CN106774784A (en) * | 2015-11-20 | 2017-05-31 | 意法半导体(鲁塞)公司 | The standby mode of electronic circuit |
| CN108631451A (en) * | 2018-07-20 | 2018-10-09 | 泉州市顺风耳电子科技有限公司 | A kind of environmental electromagnetic wave energy acquisition circuit applied to intercom |
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Application publication date: 20141112 |