CN205104966U - Energy -conserving charger of ability auto -power -off - Google Patents
Energy -conserving charger of ability auto -power -off Download PDFInfo
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- CN205104966U CN205104966U CN201520929651.9U CN201520929651U CN205104966U CN 205104966 U CN205104966 U CN 205104966U CN 201520929651 U CN201520929651 U CN 201520929651U CN 205104966 U CN205104966 U CN 205104966U
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Abstract
The utility model discloses an energy -conserving charger of ability auto -power -off, including the bridge type rectifier circuit, ON -OFF control circuit, high -frequency transformer, the low voltage output circuit that connect gradually, it still includes: the electronic switch between bridge type rectifier circuit and ON -OFF control circuit concatenates, and the low -pressure end control detection circuit of connection low voltage output circuit, its size with feedback charger output current, output control signal, the isolating driver circuit of connecting low -pressure end control detection circuit, connect the last electric self -sustaining circuit of isolating driver circuit and electronic switch's control end, it is according to the control signal control electronic switch's after keeping apart break -make to the turn on level that the electricity initial stage provided the short time to electronic switch's control end on the charger is in order to maintain switching on of electronic switch, compared with the prior art, the utility model discloses no -load loss is eliminated to ability automatic disconnection commercial power after charging, practices thrift the electric energy, prolongs the life of battery charging outfit, improves electrical safety nature, have small in size, low cost's advantage concurrently.
Description
Technical field
The utility model relates to charger, particularly relates to a kind of charger for mobile phone and electric bicycle charging, this charger can after charging terminates auto-breaking, reduce no-load loss and reach energy-conservation and requirement that is safety utilization of electric power.
Background technology
The current development along with society and scientific and technological level constantly progress, electric motor car and cell phone type digital electronic goods have become main traffic instrument and necessity in daily life.These equipment or product generally use powered battery, and in life, people have got used to using these instruments or equipment daytime, and night is its charging, and therefore ubiquity charger device and is in "on" position for a long time.Some people several days, within tens days, even long-term charger device is placed in energising holding state, makes charger be in insignificant electriferous state for a long time, except wasting energy, also will speed up the aging of these charging devices, even cause security incident.There is certain time length in the charging interval of these charger devices in addition, is 8--10 hour as the complete charging interval of electric bicycle, and cell phone type digital electronic goods generally charge and do not take 2-3 hour not etc.Due to habits and customs and the condition restriction of people, the connection of charger and civil power cannot be disconnected in time when charging complete; Simultaneously because current technology is perfect not enough, automatically disconnect when thoroughly cannot solve charging complete with charger or by the electrical connection of fill device, especially can not disconnect the electrical connection with line, therefore there is no-load loss, also there is potential safety hazard simultaneously.
Nowadays general below 100W electronic equipment, what generally use as charger, power supply adaptor is all adopt off-line switch flyback switch circuit, and 85V ~ 275V alternating current that electrical network provides by circuit is converted to the direct voltage required for electronic equipment.Under normal operating conditions, the loss of inverse-excitation type switch power-supply mainly comprises conduction loss and switching loss, and the loss of control circuit.Under holding state, because the output current of system is close to zero, conduction loss can be ignored, and the loss of switching loss and control circuit becomes main system standby power consumption.Referring to Fig. 2, the idling consumption existed in the present case mainly contains and starts loss (R201, R202), absorption loss (R203, C201), high frequency transformer magnetic core loss (T), output rectifying tube reverse recovery loss (D301), driving loss (R211), switching loss (Q201).Due to the particularity of charger, namely in once complete charging process, without the need to again starting after charging complete, therefore idling consumption is exactly a kind of serious waste.
Often be reported in media or the charging of the digital electronic goods such as the electric motor car of news or mobile phone time the fire incident that causes, moment prompting people charge safe importance.Various charge protection device or equipment constantly appear on the market, these charge protection devices or equipment be reduce charging security incident serve positive effect, but this kind of protective device also also exists following deficiency: 1, need manually to participate in, namely need user initiatively to open or start just effective, such as push button switch activated can use, and it is convenient not to use; 2, timing device, timing device is the time of artificial setting, and the time arrives, deenergization, and due to the uncertainty in charging interval, battery remaining power is different, and the charging interval is not identical yet, and therefore timing can only increase the problem that duration solves power-off; 3, there are technological difficulties because the charger of current main flow generally adopts high frequency switch power transforming circuit structure (traditional iron-core transformer is progressively withdrawn from the market) therefore to realize power down function by the break-make of the low voltage control high-pressure side of output, especially the mode of Control is utilized, due to the volume reason of relay, the problem that product is miniaturized and microminiaturized cannot be solved, so almost do not have possibility to use the application mode of relay on charger for mobile phone.
Utility model content
The utility model is the problems referred to above that will solve prior art, proposes the energy-saving charger that automatically can disconnect civil power after a kind of charging terminates.
For solving the problems of the technologies described above, the technical scheme that the utility model proposes is the energy-saving charger of a kind of energy of design auto-breaking, comprise connect successively bridge rectifier, ON-OFF control circuit, high frequency transformer, connection high frequency transformer secondary end low voltage output circuit, also comprise: be serially connected in the electronic switch between bridge rectifier and ON-OFF control circuit, and low-pressure end controls testing circuit, connect low-voltage output circuit, in order to feed back the size of output current of charger, the size according to output current exports control signal; Isolated drive circuit, connects low-pressure end and controls testing circuit, in order to the described control signal of isolation feedback; Power on self-hold circuit, connect the control end of isolated drive circuit and electronic switch, the break-make of electronic switch is controlled according to the control signal after isolation, and to provide the conduction level of short time to the control end of electronic switch at the charger initial stage that powers on, in order to maintain conducting when electronic switch initially powers on.
Described isolated drive circuit comprises photoelectrical coupler, and the input side of this photoelectrical coupler connects described low-pressure end and controls testing circuit, and outlet side connects described high-pressure side and to power on self-hold circuit.
Described electronic switch can adopt NMOS tube, and is serially connected in the negative pole output line of described bridge rectifier; The described self-hold circuit that powers on comprises the first resistance, the first electric capacity, the second resistance that are serially connected between bridge rectifier positive pole output line and negative pole output line, the 3rd resistance is connected in series between the tie point of the first resistance and the first electric capacity and the collector electrode of described photoelectrical coupler, first electric capacity is connected the emitter of photoelectrical coupler and the grid of electronic switch with the tie point of the second resistance, the 4th resistance and voltage-stabiliser tube in parallel between the grid of electronic switch and source electrode.
Described electronic switch also can adopt PMOS, and is serially connected in the positive pole output line of described bridge rectifier; The described self-hold circuit that powers on comprises the first resistance, the second resistance, the first electric capacity that are serially connected between bridge rectifier positive pole output line and negative pole output line, first resistance is connected the grid of electronic switch and the collector electrode of described photoelectrical coupler with the tie point of the second resistance, the emitter of photoelectrical coupler connects the negative pole output line of bridge rectifier by the 3rd resistance, the 4th resistance and voltage-stabiliser tube in parallel between the grid of electronic switch and source electrode.
Above-mentioned first electric capacity two ends can a reboot button in parallel, and this reboot button adopts and often drives button.
Described low-pressure end control testing circuit DC power supply used and the output of the described low-voltage output circuit that is of coupled connections, low-pressure end controls testing circuit and comprises the current sense resistance be serially connected in low-voltage output circuit output line, amplifier, comparator, the two ends of current sense resistance are connected inverting input and the in-phase input end of amplifier with the 11 resistance respectively by the tenth resistance, the 9th resistance is connected in series between amplifier out with its inverting input, amplifier out connects comparator inverting input, comparator in-phase input end connects DC power supply by the 7th resistance, and by the 8th grounding through resistance, DC power supply connects the anode of described photoelectrical coupler input side by the 5th resistance, the negative electrode of photoelectrical coupler input side connects the output of comparator.
Forward between the anode of described photoelectrical coupler input side and negative electrode also connects indicator light.
The negative electrode of described photoelectrical coupler input side be connected a mechanical switch between ground, this mechanical switch is arranged in charger accessory power outlet, and when there being plug to insert in socket, mechanical switch disconnects, when in socket without switch conduction mechanical during plug.
Described charger accessory power outlet adopts USB female seat, this female seat comprise for encapsulate and the holder of the plastic cement material of the metal shell of front opening, the ligule be arranged in metal shell, the metal stitch be embedded in holder, the rear portion of described holder is provided with the boss of a plastic cement material, groove is provided with in this boss, described mechanical switch is inlayed in groove, the button portion of this switch is outstanding by the top to described metal stitch in boss, and when USB plug and the grafting of USB female seat, described button portion can be touched to trigger described mechanical switch in the front end of USB plug.
Compared with prior art, the utility model automatically can disconnect civil power after charging terminates, and eliminates no-load loss, saves energy, extends the useful life of charging device, improves electrical safety; Have compact, advantage with low cost concurrently.
Accompanying drawing explanation
Fig. 1 is the utility model theory diagram;
Fig. 2 is the circuit diagram of the utility model embodiment;
Fig. 3 is the circuit diagram of another embodiment of the utility model;
Fig. 4 is the cutaway view of the utility model USB female seat.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is described in further detail.Should be appreciated that specific embodiment described herein only for explaining the utility model, and be not used in restriction the utility model.
Referring to the theory diagram shown in Fig. 1, the energy-saving charger of the energy auto-breaking that the utility model discloses, comprise the bridge rectifier, electronic switch Q1, ON-OFF control circuit, high frequency transformer, the low-voltage output circuit that connect successively, and be connected to that low-pressure end between low-voltage output circuit and electronic switch controls testing circuit, isolated drive circuit, power on self-hold circuit in turn.Wherein low-pressure end controls testing circuit, connects low-voltage output circuit, and in order to feed back the size of output current of charger, the size according to output current exports control signal; Isolated drive circuit, connects low-pressure end and controls testing circuit, in order to the described control signal of isolation feedback, makes high-low pressure control circuit electrical isolation; Power on self-hold circuit, connect the output of isolated drive circuit and the control end of electronic switch, control the break-make of electronic switch according to the control signal after isolation, and provide the conduction level of short time to maintain the conducting of electronic switch at the charger initial stage that powers on to the control end of electronic switch.
Referring to Fig. 1, power on initial, the self-hold circuit that powers on provides the conduction level of short time to electronic switch, conducting when electronic switch is powered on, the ON-OFF control circuit of electronic switch rear end, high frequency transformer obtain electric, and the low-voltage output circuit of high frequency transformer secondary end exports direct current to load.Current flowing is had in low-voltage output circuit, low-pressure end controls testing circuit and charging current detected, namely output resume keeps the control signal of conducting, this control signal is transferred to the self-hold circuit that powers on after isolated drive circuit isolation, the self-hold circuit that powers on controls electronic switch and continues conducting, realize self-sustaining by this, load obtains continuous print charging.When charging terminates, low-pressure end controls testing circuit and detects that charging current is zero (or close to zero), send the control signal of cut-off immediately, this control signal is transferred to the self-hold circuit that powers on after isolated drive circuit isolation, the self-hold circuit that powers on enters power-off lock-out state and controls electronic switch cut-off and disconnects, the ON-OFF control circuit of electronic switch rear end, high frequency transformer dead electricity, further low-voltage output circuit, low-pressure end control the equal dead electricity of testing circuit, circuit power consumption is reduced to zero, and therefore stand-by power consumption is zero substantially.Realize saves energy by this, extend the useful life of charging device, improve the function of electrical safety.
In the preferred embodiment, described isolated drive circuit comprises photoelectrical coupler Q2, and the input side of this photoelectrical coupler connects described low-pressure end and controls testing circuit, and power on described in outlet side connects self-hold circuit.
Referring to the preferred embodiment shown in Fig. 2, electronic switch Q1 adopts NMOS tube, and is serially connected in the negative pole output line of described bridge rectifier; The described self-hold circuit that powers on comprises the first resistance R1, the first electric capacity C1, the second resistance R2 that are serially connected between bridge rectifier positive pole output line and negative pole output line, the 3rd resistance R3 is connected in series between the tie point of the first resistance and the first electric capacity and the collector electrode of described photoelectrical coupler Q2, first electric capacity is connected the emitter of photoelectrical coupler and the grid of electronic switch with the tie point of the second resistance, the 4th resistance R4 and voltage-stabiliser tube D6 in parallel between the grid of electronic switch and source electrode.Powering on initially, can not to suddenly change principle according to electric capacity both end voltage, first electric capacity C1 both end voltage is 0, be equivalent to C1 short circuit, the high-voltage dc voltage (high-voltage dc voltage value is determined by the 110--220V electric main inputted) that electric main exports after bridge rectifier rectification, electric current flows through R1, C1, R2, the node NODE of R1 and R2 produces dividing potential drop, the voltage of dividing point is high level, this high level is added to the grid of Q1, Q1 conducting, the ON-OFF control circuit of Q1 rear end, high frequency transformer obtains electric, the low-voltage output circuit of high frequency transformer secondary end obtains electric, and export charging current, low-pressure end controls testing circuit and charging current detected, make photoelectrical coupler Q2 conducting, bridge rectifier positive pole (H+) voltage is through R1, R3, voltage after the output dividing potential drop of Q2 is added to the grid of Q1, system forms self-locking, Q1 continues conducting, charger trickle charge.Along with the increase of time, the voltage at C1 two ends is increased to supply voltage, open circuit is equivalent in DC circuit, the current potential of NODE node is simultaneously also in reduction, now the current potential of Q1 grid depends on the output whether conducting of Q2, namely depend on whether have charging current, due to the output conducting of Q2, the voltage at C1 two ends is close to 0.Have charging current (charging), the output conducting of Q2, Q1 conducting system forms self-locking, charger continuous operation; Without charging current, (or charging current is very little, charging terminates), Q2 ends, Q1 loses turn-on condition and ends, the self-hold circuit that powers on enters power-off lock function (or state), ON-OFF control circuit, high frequency transformer etc. cannot form loop, low-voltage output circuit dead electricity, and the electric current in whole circuit is zero substantially, and therefore stand-by power consumption is zero substantially.
In sum, the self-hold circuit that powers on has two kinds of mode of operations: the self-sustaining pattern that powers on and power-off locking mode.1, power on self-sustaining pattern: when powering on initial, the self-hold circuit that powers on provides the level enough making electronic switch conducting, control electronic switch while powering on, be in conduction mode, control electronic switch ON time can according to circuit need be set as that several ms is to the several seconds.2, power-off locking mode: the self-sustaining mode of operation that powers on can only make electronic switch maintain the conducting of short time, the break-make of electronic switch will be controlled to determine by Q2 afterwards.The output conducting of control Q2, electronic switch Q1 is by constant conduction, and the output of control Q2 disconnects (high-impedance state) electronic switch Q1 and disconnects, and the self-hold circuit that powers on enters power-off lock-out state.The self-hold circuit that powers on is once after entering power-off lock-out state, and circuit cannot oneself unlock state.Because the control of Q2 is at low-pressure end, therefore low-pressure end is once lose power supply, and Q2 controls also will lose efficacy, and the self-hold circuit that therefore powers on enters power-off lock-out state.
Referring to the preferred embodiment shown in Fig. 3, in this example, electronic switch Q1 adopts PMOS, and is serially connected in the positive pole output line of described bridge rectifier; The described self-hold circuit that powers on comprises the first resistance R1, the second resistance R2, the first electric capacity C1 that are serially connected between bridge rectifier positive pole output line and negative pole output line, first resistance is connected the grid of electronic switch and the collector electrode of described photoelectrical coupler Q2 with the tie point of the second resistance, the emitter of photoelectrical coupler connects the negative pole output line of bridge rectifier by the 3rd resistance R3, the 4th resistance R4 and voltage-stabiliser tube D6 in parallel between the grid of electronic switch and source electrode.Powering on initially, can not to suddenly change principle according to electric capacity both end voltage, first electric capacity C1 both end voltage is 0, be equivalent to C1 short circuit, the high-voltage dc voltage (high-voltage dc voltage value is determined by the 110--220V electric main inputted) that electric main exports after bridge rectifier rectification, electric current flows through R1, R2, C1, R1 and R2 produces dividing potential drop, relative to H+ point, dividing point NODE is negative voltage, this negative voltage is added to the grid of Q1, Q1 conducting, the ON-OFF control circuit of Q1 rear end, high frequency transformer obtains electric, low-voltage output circuit obtains electric, and export charging current, low-pressure end controls testing circuit and charging current detected, make the output conducting of photoelectrical coupler Q2, bridge rectifier positive pole (H+) voltage is through R1, Q2, R3 dividing potential drop, the negative voltage of R1 lower end (NODE end) is added to the grid of Q1, system forms self-locking, Q1 continues conducting, charger continuous operation.Along with the voltage at the increase C1 two ends of time raises gradually, open circuit is equivalent in DC circuit, voltage between H+ point and NODE node is also reducing simultaneously, now the current potential of Q1 grid depends on the output whether conducting of Q2, namely depend on whether have charging current, due to the output conducting of Q2, the voltage at C1 two ends is close to 0.(charge) when there being charging current, the output conducting of Q2, Q1 conducting system forms self-locking, charger continuous operation; Without charging current, (or charging current is very little, charging terminates), Q2 ends, Q1 loses turn-on condition and ends, the self-hold circuit that powers on enters power-off lock function (or state), ON-OFF control circuit, high frequency transformer etc. cannot form loop, low-voltage output circuit dead electricity, and the electric current in whole circuit is zero substantially, and therefore stand-by power consumption is zero substantially.
In practical application; when after charger power-off protection; if for again charging; maybe to give the charging of other electronic product; charger and electricity network is needed to depart from disconnection completely; and then charger is accessed electricity network, normally can use charging protection function, but this needs frequent plug charger mains terminal.In order to reduce the inconvenience that plug charger brings, increasing the flexibility and convenience that use operation, therefore setting up a reboot button.Referring to Fig. 2 and Fig. 3, a reboot button AN in parallel at the first electric capacity C1 two ends, this reboot button adopts and often drives button.When after charge protection power-off; if desired again charge function is started; without the need to charger being departed from electricity network (or socket); only need press the function that cuts off self-lock (or state) that lower startup button AN removes charger; charger can restart normal use, brings great convenience to user.
Referring to the preferred embodiment shown in Fig. 2, described low-pressure end control testing circuit DC power supply used and the output of the described low-voltage output circuit that is of coupled connections, low-pressure end controls testing circuit and comprises the current sense resistance RS be serially connected in low-voltage output circuit output line, amplifier AMP, comparator CMP, the two ends of current sense resistance are connected inverting input and the in-phase input end of amplifier with the 11 resistance R11 respectively by the tenth resistance R10, the 9th resistance R9 is connected in series between amplifier out with its inverting input, amplifier out connects comparator inverting input, comparator in-phase input end connects DC power supply by the 7th resistance R7, and by the 8th resistance R8 ground connection, DC power supply connects the input side of described photoelectrical coupler Q2 by the 5th resistance R5, the negative electrode of photoelectrical coupler connects the output of comparator.Current sense resistance RS is serially connected in the output loop of low-voltage output circuit, when there being charging current, RS two ends produce voltage difference, this voltage is fed back in amplifier AMP by R10 and R11 and amplifies, signal after amplification delivers to comparator inverting input, compare (preset value is set by R7 and R8) with the preset value of in-phase end, end of oppisite phase current potential is greater than in-phase end, comparator output low level signal, make the output conducting of Q2, and then make Q1 conducting, system enters constant conduction lock-out state, and charger continues charging.When the charging of load battery is saturated, charging current be zero or close to zero time, the voltage difference that R10 and R11 feeds back is little, and the current potential of comparator inverting input is less than the preset potential of in-phase end, and the output of comparator exports high level, Q2 output is made to be high-impedance state, export cut-off, system unlocks, and then Q1 is ended, the self-hold circuit that powers on enters power-off lock-out state, and charger stops charging.For showing the operating state of charger, photoelectrical coupler input side and meet an indicator light LED.Charger is when the work of charging, and indicator light is lighted; During charger cut-off power-off, indicator light extinguishes.
Low-pressure end in Fig. 3 controls identical with Fig. 2 of testing circuit, does not repeat them here.
More than design can normally work when being and connecting civil power after formerly accessing load again, but formerly connects civil power, then cisco unity malfunction under the state of rear access load.This does not connect load owing to first connecting civil power, and charging current is zero, after system only can maintain the work of several seconds, the self-hold circuit that powers on will enter power-off lock-out state, access load again after power-off locking, electronic switch can not restart connection, and charger can not start charging.Referring to Fig. 2 or Fig. 3, for solving this defect, photoelectrical coupler Q2 input negative electrode be connected a mechanical switch S1 between ground, this mechanical switch is arranged in charger accessory power outlet.The machinery switch conduction when not inserting plug in charger accessory power outlet, DC power supply VCC through the input of R5, Q2, S1 to form path conducting, the conducting of Q2 output is made not depend in charge circuit whether have electric current, charger is in holding state, solve by this and first connect civil power and do not connect load, charger rear end is the bringing onto load problem that can not restart not; When now inserting the charging of the electronic product such as mobile phone, electric bicycle in charger accessory power outlet, mechanical switch synchronously disconnects, and the conducting of Q2 afterwards only depends in circuit whether have charging current, and system enters normal feedback controling mode.
Described charger accessory power outlet adopts USB female seat, this female seat comprise for encapsulate and the holder 3 of the plastic cement material of the metal shell 1 of front opening, the ligule be arranged in metal shell, the metal stitch 4 be embedded in holder, the rear portion of described holder is provided with the boss 5 of a plastic cement material, groove is provided with in this boss, described mechanical switch is inlayed in groove, the button portion 6 of this switch is outstanding by the top to described metal stitch in boss, and when USB plug and the grafting of USB female seat, described button portion can be touched to trigger described mechanical switch in the front end of USB plug.Referring to Fig. 4, mechanical switch comprises the second quiet arm 9 of the swing arm 7 of strip and the first quiet arm 8 of strip and strip, arrangement and the direction of inserting perpendicular to described USB plug in opposite directions about described swing arm and first, second quiet arm, to the described button portion 6 of outstanding formation above described metal stitch 4 in the middle part of swing arm; When USB plug is not inserted, the end of swing arm forms closed type switch together with the lapping ends of the first quiet arm, and the end separating of the end of swing arm and the second quiet arm forms open type switch; When USB plug is inserted, described button portion is touched in the front end of USB plug, and the end of swing arm is with the end separating of the first quiet arm, the end of swing arm together with the lapping ends of the second quiet arm, and the disconnection of closed type switch, simultaneously open type switch close conducting; Described swing arm becomes 180 ° of angles to stretch out or stretch out at an angle of 90 by the rear sidewall of metal shell with the leading foot of first, second quiet arm and the leading foot of described metal stitch 4 in the rear end by metal shell 1.Swing arm 7 is provided with back-moving spring 10 between the inner surface deviating from described metal shell 1 opening direction and described boss 5.When USB plug inserts USB female seat, button portion 6 can to intrinsic displacement, namely described switch be triggered by the compressing of the front end of USB plug.Use wherein closed type switch in the present embodiment.
The USB female seat that the utility model discloses simultaneously separate case is applied for a patent.
Above embodiment is only and illustrates, non-ly provides constraints.Anyly do not depart from the application's spirit and category, and to its equivalent modifications of carrying out or change, among the right that all should be contained in the application.
Claims (8)
1. the energy-saving charger of an energy auto-breaking, comprise the bridge rectifier, ON-OFF control circuit, high frequency transformer, the low-voltage output circuit that connect successively, characterized by further comprising: be serially connected in the electronic switch (Q1) between bridge rectifier and ON-OFF control circuit, and low-pressure end controls testing circuit, connect low-voltage output circuit, in order to feed back the size of output current of charger, the size according to output current exports control signal;
Isolated drive circuit, connects low-pressure end and controls testing circuit, in order to the described control signal of isolation feedback;
Power on self-hold circuit, connect the control end of isolated drive circuit and electronic switch, control the break-make of electronic switch according to the control signal after isolation, and provide the conduction level of short time to maintain the conducting of electronic switch at the charger initial stage that powers on to the control end of electronic switch.
2. the energy-saving charger of energy auto-breaking as claimed in claim 1, it is characterized in that: described isolated drive circuit comprises photoelectrical coupler (Q2), the input side of this photoelectrical coupler connects described low-pressure end and controls testing circuit, and power on described in outlet side connects self-hold circuit.
3. the energy-saving charger of energy auto-breaking as claimed in claim 2, is characterized in that: described electronic switch (Q1) adopts NMOS tube, and is serially connected in the negative pole output line of described bridge rectifier;
The described self-hold circuit that powers on comprises the first resistance (R1), the first electric capacity (C1), the second resistance (R2) that are serially connected between bridge rectifier positive pole output line and negative pole output line, the 3rd resistance (R3) is connected in series between the tie point of the first resistance and the first electric capacity and the collector electrode of described photoelectrical coupler (Q2), first electric capacity is connected the emitter of photoelectrical coupler and the grid of electronic switch with the tie point of the second resistance, the 4th resistance (R4) in parallel and voltage-stabiliser tube (D6) between the grid of electronic switch and source electrode.
4. the energy-saving charger of energy auto-breaking as claimed in claim 2, is characterized in that: described electronic switch (Q1) adopts PMOS, and is serially connected in the positive pole output line of described bridge rectifier;
The described self-hold circuit that powers on comprises the first resistance (R1), the second resistance (R2), the first electric capacity (C1) that are serially connected between bridge rectifier positive pole output line and negative pole output line, first resistance is connected the grid of electronic switch and the collector electrode of described photoelectrical coupler (Q2) with the tie point of the second resistance, the emitter of photoelectrical coupler connects the negative pole output line of bridge rectifier by the 3rd resistance (R3), the 4th resistance (R4) in parallel and voltage-stabiliser tube (D6) between the grid of electronic switch and source electrode.
5. the energy-saving charger of the energy auto-breaking as described in any one of claim 3 or 4, is characterized in that: described first electric capacity (C1) two ends reboot button (AN) in parallel, this reboot button adopts and often drives button.
6. the energy-saving charger of energy auto-breaking as claimed in claim 5, it is characterized in that: described low-pressure end control testing circuit DC power supply used and the output of the described low-voltage output circuit that is of coupled connections, low-pressure end controls testing circuit and comprises the current sense resistance (RS) be serially connected in low-voltage output circuit output line, amplifier (AMP), comparator (CMP), the two ends of current sense resistance are connected inverting input and the in-phase input end of amplifier with the 11 resistance (R11) respectively by the tenth resistance (R10), the 9th resistance (R9) is connected in series between amplifier out with its inverting input, amplifier out connects comparator inverting input, comparator in-phase input end connects DC power supply by the 7th resistance (R7), and by the 8th resistance (R8) ground connection, DC power supply connects the anode of described photoelectrical coupler (Q2) input side by the 5th resistance (R5), the negative electrode of photoelectrical coupler input side connects the output of comparator, between the anode of described photoelectrical coupler and negative electrode, forward connects indicator light (LED).
7. the energy-saving charger of energy auto-breaking as claimed in claim 6, it is characterized in that: the negative electrode of described photoelectrical coupler (Q2) be connected a mechanical switch (S1) between ground, this mechanical switch is arranged in charger accessory power outlet, when there being plug to insert in socket, mechanical switch disconnects, when in socket without switch conduction mechanical during plug.
8. the energy-saving charger of energy auto-breaking as claimed in claim 7, it is characterized in that: described charger accessory power outlet adopts USB female seat, this female seat comprise for encapsulate and the metal shell of front opening (1), be arranged on the holder (3) of the plastic cement material of the ligule in metal shell, be embedded in the metal stitch (4) in holder, the rear portion of described holder is provided with the boss (5) of a plastic cement material, groove is provided with in this boss, described mechanical switch is inlayed in groove, the button portion (6) of this switch is outstanding by the top to described metal stitch in boss, when USB plug and the grafting of USB female seat, described button portion can be touched to trigger described mechanical switch in the front end of USB plug.
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| CN201520929651.9U CN205104966U (en) | 2015-11-20 | 2015-11-20 | Energy -conserving charger of ability auto -power -off |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244981A (en) * | 2015-11-20 | 2016-01-13 | 深圳市祝你快乐科技有限公司 | Energy saving charger capable of automatic power cutoff |
| CN111987767A (en) * | 2020-08-19 | 2020-11-24 | 重庆凯米尔汽油机有限公司 | Intelligent power-off control system |
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2015
- 2015-11-20 CN CN201520929651.9U patent/CN205104966U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244981A (en) * | 2015-11-20 | 2016-01-13 | 深圳市祝你快乐科技有限公司 | Energy saving charger capable of automatic power cutoff |
| WO2017084528A1 (en) * | 2015-11-20 | 2017-05-26 | 深圳市祝你快乐科技有限公司 | Energy-saving charger capable of automatically powering off |
| US10749364B2 (en) | 2015-11-20 | 2020-08-18 | Shenzhen Znkl Technology Co., Ltd | Energy-saving charger capable of automatically powering off |
| CN111987767A (en) * | 2020-08-19 | 2020-11-24 | 重庆凯米尔汽油机有限公司 | Intelligent power-off control system |
| CN111987767B (en) * | 2020-08-19 | 2023-09-05 | 重庆市凯米尔动力机械有限公司 | Intelligent power-off control system |
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