CN201266883Y - Apparatus for reducing switch mode power source standby power consumption - Google Patents
Apparatus for reducing switch mode power source standby power consumption Download PDFInfo
- Publication number
- CN201266883Y CN201266883Y CNU2008201172984U CN200820117298U CN201266883Y CN 201266883 Y CN201266883 Y CN 201266883Y CN U2008201172984 U CNU2008201172984 U CN U2008201172984U CN 200820117298 U CN200820117298 U CN 200820117298U CN 201266883 Y CN201266883 Y CN 201266883Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- switched
- mode power
- voltage
- transistor
- 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.)
- Expired - Lifetime
Links
- 239000004065 semiconductor Substances 0.000 claims description 40
- 238000005538 encapsulation Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 17
- 239000003990 capacitor Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
本实用新型揭示了一种用于将开关模式电源(SMPS)控制器耦合到整流后的线电压并降低SMPS待机功率的装置，包括：高压启动晶体管，用于在SMPS的启动期间提供充电电流并在SMPS控制器的正常操作期间不提供电流；开关，耦合到高压启动晶体管，该开关用于从SMPS控制器接收控制信号，该控制信号在SMPS启动阶段使高压启动晶体管工作在导通状态，而在SMPS正常操作期间使高压启动晶体管工作在截止状态；其中，当SMPS控制器处于正常操作阶段时流过启动晶体管的电流远小于SMPS控制器处于启动阶段时流过启动晶体管的电流，即充电电流。
The utility model discloses a device for coupling a switched-mode power supply (SMPS) controller to the rectified line voltage and reducing the SMPS standby power, comprising: a high-voltage start-up transistor for providing charging current during start-up of the SMPS and No current is supplied during normal operation of the SMPS controller; a switch, coupled to the high-voltage start-up transistor, the switch is used to receive a control signal from the SMPS controller, the control signal causes the high-voltage start-up transistor to operate in a conductive state during the SMPS start-up phase, and During the normal operation of the SMPS, the high-voltage start-up transistor works in the cut-off state; wherein, the current flowing through the start-up transistor when the SMPS controller is in the normal operation phase is much smaller than the current flowing through the start-up transistor when the SMPS controller is in the start-up phase, that is, the charging current .
Description
Technical field
The utility model relates to switched-mode power supply (SMPS), more particularly, relates to the device of the stand-by power consumption that reduces switched-mode power supply.
Background technology
Switched-mode power supply (SMPS) has that size is little, efficient is high and power output advantage capacious, and is widely used in the fields such as power supply adaptor of charger for mobile phone, notebook computer.In recent years, the lay special stress on green power supply, green power supply requires higher conversion efficiency, especially requires low stand-by power consumption.When being applied to charger or power supply adaptor, be connected on the socket but when also not being connected in the load, it only consumes stand-by power consumption at this power supply, this just requires stand-by power consumption low more good more.
Fig. 1 is the schematic diagram of traditional master by-pass cock mode power supply systems.When line voltage Vac was applied to this system, (be called starting resistor, in the time of Vst), (being that output pin OUT keeps low level) can't appear in switching signal to be lower than a threshold voltage at Vcc voltage.This stage be called switched-mode power supply the startup stage.In this stage, Vcc capacitor C 1 is charged by starting resistance R1 by the line voltage Vin behind over commutation.When Vcc surpassed Vst, startup stage, finished, and the output pin OUT of controller produces switching signal with the conducting of power controlling pipe 2 and turn-off to regulate the output voltage V out on the secondary coil.Since the operating current of controller 1 the startup stage after can than controller 1 the startup stage needed electric current a lot of greatly, Vcc capacitor C 1 must obtain extra energy by ancillary coil 4 during the normal running of system provide operating current to controller 1.
Typically, in switched-mode power supply shown in Figure 1, Vcc capacitor C 1 is the electric capacity of microfarad (μ F) grade.The resistance value of starting resistance R1 is more little, more can be for C1 produces big charging current so that the startup stage can finish apace.But big electric current can consume more energy by R1 during normal running, and this can make the stand-by power consumption of system increase.
Therefore, need a kind of technology that reduces the stand-by power consumption of switched-mode power supply.
The utility model content
The utility model is at switched-mode power supply (SMPS), aims to provide a kind of equipment and method that is used to reduce the stand-by power consumption of switched-mode power supply.As an example, the utility model is used to reduce the stand-by power consumption of PWM or PFM mode switch power-supply system.But the utlity model has wide applications more.
The utility model provides a kind of device that is used for switched-mode power supply (SMPS) controller is coupled to the line voltage after the rectification on the one hand, this device comprises: the high voltage startup transistor is used for charging current being provided between the starting period of SMPS and electric current not being provided during the normal running of SMPS controller; Switch, be coupled to the high voltage startup transistor, this switch is used for receiving control signal from the SMPS controller, and this control signal makes the high voltage startup transistor be operated in conducting state startup stage of SMPS, and is operated in cut-off state at SMPS chien shih error-free running period high voltage startup transistor; Bias voltage equipment is connected in series to this switch, and this bias voltage equipment is used for will starting transistor and maintains cut-off state during the normal running of SMPS controller; Wherein, when being in normal operation phase, the SMPS controller flows through the charging current of the transistorized electric current of high voltage startup much smaller than the SMPS controller is in when startup stage.
The utility model provides a kind of device that is used for switched-mode power supply (SMPS) controller is coupled to the line voltage after the rectification on the other hand, this device comprises: the high voltage startup transistor is used for charging current being provided between the starting period of SMPS and electric current not being provided during the normal running of SMPS controller; Zener diode is coupled to the transistorized control end of high voltage startup, and the puncture voltage of this Zener diode is higher and lower than the normal operating voltage of SMPS controller than the starting resistor of SMPS controller; This high voltage startup transistor is turned off during the normal running of SMPS controller, and flows through the charging current of the transistorized electric current of high voltage startup much smaller than the SMPS controller is in when startup stage when the SMPS controller is in normal operation phase.
The utility model provides a kind of device that is used for that the SMPS controller is coupled to the line voltage after the rectification and reduces switched-mode power supply (SMPS) standby power on the other hand, this SMPS controller has two kinds of modes of operation, and this SMPS controller enters first state when the voltage of SMPS controller power source end is lower than first reference voltage, this SMPS controller enters second state when the voltage of power end is higher than second reference voltage.This device comprises: high-voltage semi-conductor equipment, have first end, second end and the 3rd end, and this first end is coupled to line voltage end after the rectification, power end, the 3rd end that second end is coupled to the SMPS controller are used to control the electric current between first end and second end; Bias circuit is coupled to high-voltage semi-conductor equipment, and bias circuit is used for opening this high-voltage semi-conductor equipment when the SMPS controller is in first state, and turn-offs this high-voltage semi-conductor equipment when the SMPS controller is in second state.
Switched-mode power supply (SMPS) controller that the utility model provides a kind of integrated circuit (IC) chip to constitute on the other hand comprises: first end is used to detect the output voltage of SMPS; Second end is used to export the pulse signal of controlling the SMPS output voltage; Power end is used for the high-voltage semi-conductor equipment received current from the outside; Control end is used for providing control signal to the high-voltage semi-conductor equipment of outside, makes this high-voltage semi-conductor equipment charging current was provided between the starting period of SMPS and electric current is not provided during the normal running of SMPS controller.
The utility model provides a kind of multi-chip semiconductor encapsulation that is used to regulate the output voltage of SMPS on the other hand, this encapsulation comprises: first semiconductor chip, this first semiconductor chip comprises switched-mode power supply (SMPS) controller, this SMPS controller has: first end is used to detect the output voltage of SMPS; Second end is used to export the pulse signal of controlling the SMPS output voltage; Power end is used for the high-voltage semi-conductor equipment received current from the outside; Control end, be used to provide control flows to cross the control signal of this high-voltage semi-conductor device current, and, second semiconductor chip, this second semiconductor chip comprises the high-voltage semi-conductor chip, be used to receive control signal, and in response, charging current be provided between the starting period of SMPS and electric current is not provided during the normal running of SMPS controller.
The utility model provides a kind of switched-mode power supply that is used to receive the input ac voltage after the rectification and VD is provided on the other hand, comprise: be coupled to the transformer of the AC-input voltage after the rectification, this transformer comprises primary coils, secondary coil and ancillary coil; Switched-mode power supply (SMPS) controller has the power end that is used to receive the feedback end of SMPS output voltage and is used to be coupled to ancillary coil; High-voltage semi-conductor equipment has first end, second end and the 3rd end, and this first end is coupled to the AC-input voltage after the rectification, and second end is coupled to the power end of SMPS controller, and the 3rd end is used to control the electric current between first end and second end; And bias voltage equipment, being coupled to this high-voltage semi-conductor equipment, this bias voltage equipment is used to make this high-voltage semi-conductor equipment opening between the starting period of SMPS and ending during the normal running of SMPS controller.
According to an embodiment, the utility model provides a kind of circuit that is used to reduce the stand-by power consumption of switched-mode power supply to realize.In one embodiment, in the system start-up stage, the line voltage that high voltage startup transistor, bias voltage equipment, switch and control signal are used to after the rectification provides charging current to the capacitor relevant with the Vcc pin of switched-mode power supply controller, and is cutting off the charging current that line voltage after the rectification offers Vcc electric capacity during the normal running of switched-mode power supply.
According to an embodiment, the startup stage, the switch controlled signal disconnects.All electric currents that come the line voltage after the self-rectifying enter into the transistorized base stage of high voltage startup after by starting resistance and are exaggerated so that the charging current of Vcc electric capacity to be provided.The startup stage after, switch controlled signal closure maintains the level that is lower than its emitter voltage so that bias voltage equipment can absorb from the electric current of starting resistance and with the transistorized base voltage of high voltage startup.In this case, start transistor and be in cut-off state.As a result, power consumed significantly reduces on the starting resistance, because in embodiment of the present utility model, the resistance of starting resistance can be in the switched-mode power supply in the conventional art ten times of resistance value or bigger.
According to this embodiment, the high voltage startup transistor can be bipolar transistor or MOSFET.In one embodiment, bias voltage equipment and switch are integrated in the switched-mode power supply controller chip.In addition, the high voltage startup transistor can be the equipment that separates in the power-supply system, perhaps is packaged together to form the single sealed in unit of multicore sheet on the printed circuit board (PCB) of power-supply system with integrated controller chip.In another embodiment, bias voltage equipment is Zener diode, and as a special case, this switch is in closure state all the time.High voltage startup transistor, Zener diode and switched-mode power supply controller can form the switched-mode power supply with extremely low stand-by power consumption.
In one embodiment, the startup stage during be provided for the charging current of Vcc electric capacity, and during the normal running of switched-mode power supply, cut off this charging current.
In one embodiment, the mutual conductance of using the current gain of high-voltage bipolar transistor npn npn or high-voltage MOSFET the startup stage be provided for the amplified current of Vcc electric capacity charging.
In one embodiment, by with the startup stage after transistorized base stage of high voltage startup or grid voltage be controlled at the level that is lower than its emitter or source electrode, and the turn-off characteristic that utilizes bipolar transistor or MOSFET the startup stage after the charging current of line voltage after cutting off self-rectifying.
In another embodiment, use bias voltage equipment, switch, control signal make the startup stage after start transistorized emitter/source voltage and be higher than base stage/grid voltage.
In another embodiment, bias voltage equipment and switch are integrated in the switched-mode power supply controller, so that use this integrated chip and can obtain extremely low system standby power consumption as starting transistorized low-cost separation high voltage transistor.
In another embodiment, in single encapsulation, have this integrated controller chip and this low cost high-voltage transistor chip, to be formed for having the multicore sheet equipment of extremely low system standby power consumption.
In another embodiment, use Zener diode that the switch that remains unlatching is provided as bias voltage equipment and under specific situation.This high voltage startup transistor, Zener transistor and traditional switched-mode power supply controller (not having additional start-up control circuit) can realize having the switched-mode power supply of extremely low stand-by power consumption.In one embodiment, select the starting resistor of the puncture voltage of Zener diode, and the Vcc voltage of the controller under the normal running is greater than the puncture voltage of Zener diode greater than the SMPS controller.
Use the utility model, when the SMPS controller is in normal operation phase, flow through and start transistorized electric current and the startup stage that the SMPS controller is in, the time flow through and start transistorized electric current (charging current), thereby can reduce the stand-by power consumption of system significantly.
Description of drawings
The above and other feature of the present utility model, character and advantage will be by becoming more obvious below in conjunction with accompanying drawing to the description of embodiment, wherein,
Fig. 1 is the schematic block diagram of traditional master by-pass cock mode power supply systems;
Fig. 2 is the simplified block diagram according to the switched-mode power supply of an embodiment of the present utility model (SMPS) 200;
Fig. 3 is the reduced graph of the waveform of switched-mode power supply (SMPS) controller 10 among Fig. 2;
Fig. 4 is the simplified block diagram of the part of master by-pass cock mode power (SMPS) controller 10 among Fig. 2;
Fig. 5 is according to an embodiment of the present utility model, is used for switched-mode power supply (SMPS) controller is coupled to the circuit diagram of simplification of the device of the line voltage after the rectification;
Fig. 6 is the simplified block diagram according to the low standby power loss power-supply system 600 of another embodiment of the present utility model;
Fig. 7 is the simplified block diagram according to the low standby power loss power-supply system 700 of another embodiment of the present utility model;
Fig. 8 A is the winding diagram that the twin-core sheet among Fig. 7 encapsulates the simplification of the power-supply controller of electric in 310;
Fig. 8 B is the pin output map that the twin-core sheet among Fig. 7 encapsulates the simplification of the power-supply controller of electric in 310;
Fig. 9 is the simplified block diagram according to the low standby power loss power-supply system 900 of another embodiment of the present utility model; And
Figure 10 is the reduced graph of comparison that the stand-by power consumption of the stand-by power consumption of conventional power source and power supply of the present utility model is shown.
Embodiment
Fig. 2 is the simplified block diagram according to the switched-mode power supply of an embodiment of the present utility model (SMPS) 200.This block diagram only is an example, should not be considered to be any restriction for scope of the present utility model.Those skilled the in art will appreciate that other distortion, change and alternative.As shown in the figure, SMPS200 comprises controller 10.The end that controller 10 has power end Vcc, feedback end Vfb, output OUT and is used to provide control signal ENABLE.In one embodiment, starting transistor 13 is high pressure NPN transistor.Its collector electrode is connected to the line voltage Vin after the rectification, and its base stage is connected to the end of starting resistance R1 and the high-pressure side of bias voltage equipment 12.Switch 11 has the control end that slave controller 10 receives the ENABLE signal.Switch 11 is inserted between the low-pressure end and ground of bias voltage equipment 12.
The startup stage, the ENABLE signal remains on low level, switch 11 is disconnected.Electric current by starting resistance R1 only flows into the base stage that starts transistor 13.This electric current is used for to 1 charging of Vcc capacitor C by transistor 13 amplifications.
Under normal manipulation mode, the ENABLE signal remains on high level, switch 11 closures (conducting).Bias voltage equipment 12 can be used for determining the base voltage Vb of transistor 13.Bias voltage equipment 12 is designed to Vb is maintained than on the little amplitude of Vcc and follow the variation of Vcc voltage, is in cut-off state so that start transistor 13 when the ENABLE signal is high level.
According to one embodiment of the invention, if the startup stage be that C1 is provided with same charging current, the value of R1 in the power supply 200 among Fig. 2 can increase β doubly than the starting resistance in the conventional power source shown in Fig. 1, and wherein β is the current gain that starts transistor 13.Power loss in the power supply 200 on R1 is compared with the conventional power source among Fig. 1 can be reduced to about 1/ β, and total system standby power consumption also descends significantly.
Fig. 3 is the reduced graph of the waveform of switched-mode power supply (SMPS) controller 10 among Fig. 2.This figure only is an example, should not be used to limit scope of the present utility model.Those skilled the in art will appreciate that other distortion, change and alternative.As shown in the figure, the initial start up phase in system, Vcc is a low level.The ENABLE end of controller 10 produces logic low signal.When Vcc reached threshold voltage Vst, the high signal of the ENABLE of controller 10 end output logic finished the startup stage of this moment.If owing to some reasons (being shorted to ground at secondary coil such as system's output) make Vcc drop to during system's normal running under another threshold voltage (Vuvlo), the ENABLE of controller 10 holds output logic low signal once more.In the time of under Vcc is reduced to Vuvlo, controller 10 stops at output OUT output switching signal.This is referred to as low-voltage locking (UVLO).Need finish one before system returns to normal running once more rises to Vcc above Vst startup stage new.
Fig. 4 is the simplified block diagram of the part of master by-pass cock mode power (SMPS) controller 10 among Fig. 2.As directed, V1, V2, V3 and V4 are the inner voltage references that is used for controller function that produces.The Vcc comparator detected Vcc voltage and produce logic low signal between the starting period of system.When Vcc reaches threshold voltage Vst, the high signal of comparator output logic.If owing to some reasons (being shorted to ground at secondary coil such as system's output) make Vcc drop to during system's normal running under another threshold voltage (Vuvlo), comparator is the output logic low signal once more.Controller 10 stops output switching signal.This is referred to as low-voltage locking (UVLO).Need before system returns to normal running once more, finish one new startup stage.The output of Vcc comparator is marked as ENABLE and is used to control switch 11, shown in the power supply among Fig. 2 200.Reference voltage V 1 is relevant with Vst and Vvulo with V2.In certain embodiments, Vst=(1+Ra/Rb) * V2, Vvulo=(1+Ra/Rb) * V1, and V2〉V1.Vfb and voltage reference V3 are input to an error amplifier, and the Vcs and the voltage reference V4 of the Vcs end output of controller 10 are input to peak current detector.The output of error amplifier and peak current detector is input to on-off controller again.
Fig. 5 is according to an embodiment of the present utility model, is used for switched-mode power supply (SMPS) controller is coupled to the circuit diagram of the simplification of the line voltage device after the rectification.In specific embodiment shown in Figure 5, nmos pass transistor 111 is as switch.Bias voltage equipment is made of PMOS transistor 121,122,123 and current source 124.
In the time of the startup stage that system is in, the ENABLE signal is a low level, and nmos pass transistor 111 turn-offs.It is fair that the drain voltage of nmos pass transistor 111 (Va) is pulled up to the voltage of node Vb, so electric current can not pass through PMOS transistor 121.The base stage that all starting currents through resistance R 1 enter into transistor 13 is used for Vcc capacitor C 1 so that the charging current through amplifying to be provided.
When system was in normal manipulation mode, the ENABLE signal was in high level.Node Va is pulled down to ground connection.PMOS transistor 121 is opened, and electric current flows into 121 source electrode.The grid voltage of PMOS transistor 121 determines that by PMOS transistor 122,123 and current source 124 that diode connects be Vcc-2*|Vtp|, wherein Vtp is the transistorized threshold voltage of PMOS.When system was in normal operating state, the voltage of node Vb was near Vcc-|Vtp|.Because starting the emitter voltage of transistor 13 is Vcc, be higher than its base voltage, so transistor 13 is in cut-off state.
Fig. 6 is the simplified block diagram according to the low standby power loss power-supply system 600 of another embodiment of the present utility model.As shown in the figure, power supply 600 comprises switched-mode power supply controller 210 and the high voltage startup transistor 13 that separates, and it is used to make up the system with extremely low stand-by power consumption.SMPS controller 210 comprises integrated bias voltage equipment and switch, describes as Fig. 2.Compare with traditional controller 1 shown in Figure 1, controller 210 only increases a pin (Vb).The Vb pin is connected to the base stage of the high voltage startup transistor 13 of the separation shown in Fig. 6.
According to an embodiment of the present utility model, whole system element number can be further reduces by high voltage startup transistor chip and controller chip are placed in the single encapsulation.Fig. 7 is the simplified block diagram according to the low standby power loss power-supply system 700 of another embodiment of the present utility model.As directed, power supply 700 comprises controller 310, and it comprises the controller chip of single encapsulation, such as the controller among Fig. 6 210, and the high voltage startup transistor chip, such as the equipment among Fig. 6 13.
Fig. 8 A is the winding diagram of the simplification of power-supply controller of electric in the twin-core sheet encapsulation 310 among Fig. 7 and high voltage startup transistor chip.
Fig. 8 B is the power-supply controller of electric in the twin-core sheet encapsulation 310 among Fig. 7 and the pin figure of the transistorized simplification of high voltage startup.
Fig. 9 is the simplified block diagram according to the low standby power loss power-supply system 900 of another embodiment of the present utility model.As shown in the figure, power-supply system 900 is the systems with extremely low stand-by power consumption.Power-supply system 900 comprises high voltage startup transistor 13, Zener diode 411 and the SMPS controller 410 of separation.Zener diode is as bias voltage equipment.Among this embodiment, Zener diode 411 has greater than the starting resistor Vst of SMPS controller 410 and less than the puncture voltage of the normal operating voltage of the Vcc of SMPS controller.In this embodiment, this high voltage startup transistor 13 is turned off during the normal running of SMPS system.Switch 412 is in conducting state in this particular case all the time and can be left in the basket.
In Fig. 9, the puncture voltage of Zener diode is than Vst height, so Vcc electric capacity can be recharged and reaches the voltage that is higher than Vst to finish the startup stage.The normal Vcc that provides by ancillary coil greater than Zener breakdown voltage with the startup stage after close the startup transistor.In this embodiment, Vcc is greater than Vst, and in Fig. 3, Vcc is less than Vst.This certain conditions can be by for the design of transformer, Vst, Vuvlo and realize.As shown in Figure 9, except control circuit, power supply 900 is similar with the power supply 200 shown in Fig. 2.
In one embodiment, controller 410 and Zener diode 411 can be included in the single semiconductor chip.In another embodiment, power control circuit can be the multicore sheet encapsulation that comprises SMPS controller and high-voltage semi-conductor equipment.Under this kind situation, the SMPS controller chip also comprises Zener diode.
Figure 10 is the reduced graph of comparison of the stand-by power consumption of the stand-by power consumption of conventional power source and power supply of the present utility model.As shown in the figure, according to scheme of the present utility model, the standby power of system standby power ratio conventional power source system between 80V-260Vac reduces a lot.
For a person skilled in the art, clearly, the utility model can also comprise that following expansion realizes:
Switched-mode power supply (SMPS) controller that integrated circuit (IC) chip constitutes, comprising: first end is used for the output of sense switch mode power; Second end is used for the pulse signal of output control switch mode power; Power end is used for the high-voltage semi-conductor equipment received current from the outside; Control end is used for providing control signal to the high-voltage semi-conductor equipment of outside, makes this high-voltage semi-conductor equipment charging current was provided between the starting period of SMPS and electric current is not provided during the normal running of SMPS controller.
Be used for the multi-chip semiconductor encapsulation of by-pass cock mode power, this encapsulation comprises: first semiconductor chip, this first semiconductor chip comprises switched-mode power supply (SMPS) controller, and this SMPS has: first end is used for the output voltage of sense switch mode power; Second end is used for the pulse signal of output control switch mode power output voltage; Power end is used for the high-voltage semi-conductor equipment received current from the outside; Control end is used to provide the control signal of controlling outside high-voltage semi-conductor equipment; And, second semiconductor chip, this second semiconductor chip comprises the high-voltage semi-conductor chip, is used to receive control signal, and in response, charging current is provided between the starting period of SMPS and electric current is not provided during the normal running of SMPS controller.
Above-mentioned multi-chip semiconductor encapsulation comprises the SOIC88 pin package.
Be used to receive the input ac voltage after the rectification and the switched-mode power supply of VD is provided, comprising: be coupled to the transformer of the AC-input voltage after the rectification, this transformer comprises primary coils, secondary coil and ancillary coil; Switched-mode power supply (SMPS) controller has the power end that is used to detect the feedback end of output voltage and is used to be coupled to ancillary coil; High-voltage semi-conductor equipment has first end, second end and the 3rd end, and this first end is coupled to the AC-input voltage after the rectification, and second end is coupled to the power end of SMPS controller, and the 3rd end is used to control the electric current between first end and second end; And bias voltage equipment, being coupled to this high-voltage semi-conductor equipment, this bias voltage equipment is used to make this high-voltage semi-conductor equipment in conducting between the starting period of SMPS and end during the normal running of SMPS controller.
Though the utility model is described in conjunction with the above embodiments, clearly the utility model is not limited to these embodiment.Those skilled in the art can obtain all changes, variation and of equal value the realization and not break away from design principle of the present utility model.Scope of the present utility model should be defined by the claims.Although be to control topological structure at the master of switched-mode power supply system to be described above, the utility model also can be used to the switched-mode power supply system of secondary side control.
In the above-described embodiment, the high-voltage bipolar transistor npn npn only is as an example.In other embodiment, high-voltage semi-conductor equipment can be bipolar device, comprise one or more among NPN transistor, PNP transistor, pnpn switch and the SCR.In another embodiment, high-voltage semi-conductor equipment can be fieldtron, and can comprise one or more in n type MOSFET, p type MOSFET, LDMOS, JFET, JFET and MOSFET synthetic.
Scheme of the present utility model, when the SMPS controller is in normal operation phase, flow through and start transistorized electric current and the startup stage that the SMPS controller is in, the time flow through and start transistorized electric current (charging current), thereby can reduce the stand-by power consumption of system significantly.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present utility model; those skilled in the art can be under the situation that does not break away from invention thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection range of the present utility model do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (5)
1. device that is used for that the switched-mode power supply controller is coupled to the line voltage after the rectification and reduces the switched-mode power supply standby power is characterized in that this device comprises:
The high voltage startup transistor is used for charging current being provided between the starting period of switched-mode power supply and electric current not being provided during the normal running of switched-mode power supply controller;
Switch, be coupled to the high voltage startup transistor, this switch is used for receiving control signal from the switched-mode power supply controller, this control signal makes the high voltage startup transistor be operated in conducting state startup stage of switched-mode power supply, and is operated in cut-off state at switched-mode power supply chien shih error-free running period high voltage startup transistor;
Bias voltage equipment is connected in series to this switch, and this bias voltage equipment is used for will starting transistor and maintains cut-off state during the normal running of switched-mode power supply controller;
Wherein, when the switched-mode power supply controller is in normal operation phase, flow through and start transistorized electric current and the startup stage that the switched-mode power supply controller is in, the time flow through and start transistorized electric current, i.e. charging current.
2. device as claimed in claim 1 is characterized in that, this startup transistor is a bipolar transistor, has collector electrode, base stage and emitter, wherein:
Collector electrode is connected to the line voltage after the rectification;
Emitter is connected to the power pin Vcc of switched-mode power supply controller;
Base stage is couple to line voltage after the rectification by starting resistance, and
Base stage also is couple to ground by the bias voltage equipment and the switch of series connection.
3. device as claimed in claim 2 is characterized in that,
Described switch is a nmos pass transistor, and the grid of this nmos pass transistor receives control signal from the Vcc comparator of switched-mode power supply controller;
Described bias voltage equipment is the PMOS transistor that source electrode is followed connection, and its source electrode is connected to and starts transistorized base stage;
This device also comprises,
The PMOS transistor that one or more diode in series connect, be connected at the current source that starts between emitter and the ground, described source electrode is followed and is connected the transistorized grid of PMOS and be couple to the PMOS transistor that diode connects, and makes that starting transistorized base voltage after finishing in the system start-up stage is less than or equal to the transistorized emitter voltage of startup.
4. device as claimed in claim 1 is characterized in that,
Described switch, bias voltage equipment and switched-mode power supply controller are included in the single integrated circuit (IC) chip; Perhaps
Described switch, bias voltage equipment and switched-mode power supply controller are included in first semiconductor chip, and the high voltage startup transistor is included in second semiconductor chip, and first and second semiconductor chips are included in the single multicore sheet encapsulation.
5. device that is used for that switched-mode power supply switched-mode power supply controller is coupled to the line voltage after the rectification and reduces the switched-mode power supply standby power is characterized in that this device comprises:
The high voltage startup transistor is used for charging current being provided between the starting period of switched-mode power supply and electric current not being provided during the normal running of switched-mode power supply controller;
Zener diode is coupled to the transistorized control end of high voltage startup, and the puncture voltage of this Zener diode is higher and lower than the normal operating voltage of switched-mode power supply controller than the starting resistor of switched-mode power supply controller;
This high voltage startup transistor is turned off during the normal running of switched-mode power supply controller, and when the switched-mode power supply controller is in normal operation phase, flow through and start transistorized electric current and the startup stage that the switched-mode power supply controller is in, the time flow through and start transistorized electric current, i.e. charging current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201172984U CN201266883Y (en) | 2008-05-26 | 2008-05-26 | Apparatus for reducing switch mode power source standby power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201172984U CN201266883Y (en) | 2008-05-26 | 2008-05-26 | Apparatus for reducing switch mode power source standby power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201266883Y true CN201266883Y (en) | 2009-07-01 |
Family
ID=40833252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201172984U Expired - Lifetime CN201266883Y (en) | 2008-05-26 | 2008-05-26 | Apparatus for reducing switch mode power source standby power consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201266883Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324849A (en) * | 2011-09-28 | 2012-01-18 | 魏德米勒电联接国际贸易(上海)有限公司 | Flyback switching power supply circuit |
| CN102437724A (en) * | 2011-12-12 | 2012-05-02 | 深圳市富满电子有限公司 | AC-DC chip, system and high-voltage starting control circuit thereof |
| CN102801331A (en) * | 2011-08-29 | 2012-11-28 | 上海新进半导体制造有限公司 | Switching power supply drive circuit and integrated circuit and switching power supply |
| TWI420795B (en) * | 2010-11-10 | 2013-12-21 | Noveltek Semiconductor Corp | Start-up circuit with lowered power consumption |
| CN103856084A (en) * | 2013-11-30 | 2014-06-11 | 成都岷创科技有限公司 | Primary side control power supply circuit |
| CN103944371A (en) * | 2013-01-22 | 2014-07-23 | 高奇普株式会社 | Standby power reduction device |
| CN103973089A (en) * | 2013-02-06 | 2014-08-06 | 盛群半导体股份有限公司 | High-voltage starting circuit and system |
| CN105576955A (en) * | 2016-01-30 | 2016-05-11 | 深圳南云微电子有限公司 | High voltage starting circuit and high voltage starting method |
| CN106329961A (en) * | 2015-06-30 | 2017-01-11 | 快捷半导体(苏州)有限公司 | PWM controller integrated circuit chip and operation method thereof, power supply |
-
2008
- 2008-05-26 CN CNU2008201172984U patent/CN201266883Y/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI420795B (en) * | 2010-11-10 | 2013-12-21 | Noveltek Semiconductor Corp | Start-up circuit with lowered power consumption |
| CN102801331A (en) * | 2011-08-29 | 2012-11-28 | 上海新进半导体制造有限公司 | Switching power supply drive circuit and integrated circuit and switching power supply |
| US9293981B2 (en) | 2011-08-29 | 2016-03-22 | Shanghai Sim-Bcd Semiconductor Manufacturing Co., Ltd. | Fast startup control circuit for switch mode power supply |
| CN102801331B (en) * | 2011-08-29 | 2015-07-22 | 上海新进半导体制造有限公司 | Switching power supply drive circuit and integrated circuit and switching power supply |
| CN102324849A (en) * | 2011-09-28 | 2012-01-18 | 魏德米勒电联接国际贸易(上海)有限公司 | Flyback switching power supply circuit |
| CN102437724B (en) * | 2011-12-12 | 2014-12-10 | 深圳市富满电子有限公司 | AC-DC (alternating current-direct current) chip, system and high-voltage startup control circuit of system |
| CN102437724A (en) * | 2011-12-12 | 2012-05-02 | 深圳市富满电子有限公司 | AC-DC chip, system and high-voltage starting control circuit thereof |
| CN103944371B (en) * | 2013-01-22 | 2016-11-09 | 高奇普株式会社 | Standby power reduction device |
| CN103944371A (en) * | 2013-01-22 | 2014-07-23 | 高奇普株式会社 | Standby power reduction device |
| CN103973089A (en) * | 2013-02-06 | 2014-08-06 | 盛群半导体股份有限公司 | High-voltage starting circuit and system |
| CN103973089B (en) * | 2013-02-06 | 2016-03-09 | 盛群半导体股份有限公司 | High-voltage starting circuit and system |
| CN103856084A (en) * | 2013-11-30 | 2014-06-11 | 成都岷创科技有限公司 | Primary side control power supply circuit |
| CN103856084B (en) * | 2013-11-30 | 2017-01-11 | 上海晶丰明源半导体有限公司 | primary side control power supply circuit |
| CN106329961A (en) * | 2015-06-30 | 2017-01-11 | 快捷半导体(苏州)有限公司 | PWM controller integrated circuit chip and operation method thereof, power supply |
| CN106329961B (en) * | 2015-06-30 | 2018-10-12 | 快捷半导体(苏州)有限公司 | PWM controller IC chip and its operating method, power supply |
| CN105576955A (en) * | 2016-01-30 | 2016-05-11 | 深圳南云微电子有限公司 | High voltage starting circuit and high voltage starting method |
| CN105576955B (en) * | 2016-01-30 | 2018-07-03 | 深圳南云微电子有限公司 | High-voltage starting circuit and high-voltage starting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201266883Y (en) | Apparatus for reducing switch mode power source standby power consumption | |
| US8792258B2 (en) | Method and apparatus for reducing standby power of switching mode power supplies | |
| CN108988836B (en) | Control method and package structure of power circuit | |
| US8416596B2 (en) | Switching power controller and system | |
| CN102780406B (en) | Transducer | |
| CN104734510B (en) | Switch power supply and control chip thereof | |
| CN106411135A (en) | Flyback converter with secondary side regulation | |
| CN102957304B (en) | A kind of drive circuit of triode and driving method thereof | |
| US9595861B2 (en) | Power switching converter | |
| US10020744B2 (en) | Circuits and methods for reducing output voltage overshoot of switch mode power supply | |
| TW201813271A (en) | Dynamic sharing average current mode control for active-reset and self-driven synchronous rectification for power converters | |
| CN108631601B (en) | Multi-input converter | |
| CN103151935A (en) | Control circuit for ultralow standby power consumption power supply | |
| CN103944385B (en) | The pilot circuit of a kind of super low speed paper tape reader static power disspation, control method and switch type regulator | |
| CN207819757U (en) | A kind of start-up circuit | |
| CN207910694U (en) | A kind of multichannel and adjustable mixing output switching electric power source device | |
| CN102437724B (en) | AC-DC (alternating current-direct current) chip, system and high-voltage startup control circuit of system | |
| CN106169862B (en) | Management circuit of power supply and management method of power supply | |
| CN103683892B (en) | Switching Power Supply and controller thereof | |
| CN208046449U (en) | A kind of start-up circuit of low conduction voltage drop | |
| CN218771785U (en) | Flyback Power Converter Based on Primary Side Feedback | |
| CN218041214U (en) | Flyback Power Converter Based on Primary Side Feedback | |
| CN205232030U (en) | Input undervoltage protection circuit and switching power supply | |
| CN212935791U (en) | A massage chair power supply | |
| CN109962620A (en) | A kind of self-powered circuit controlling chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090701 |