CN103973101B - A kind of DC-DC power source adapter - Google Patents
A kind of DC-DC power source adapter Download PDFInfo
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- CN103973101B CN103973101B CN201410217685.5A CN201410217685A CN103973101B CN 103973101 B CN103973101 B CN 103973101B CN 201410217685 A CN201410217685 A CN 201410217685A CN 103973101 B CN103973101 B CN 103973101B
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Abstract
The invention discloses a kind of DC-DC power source adapter, it has the function automatically switched between standby electricity-saving mode and normal operation mode, when direct current output interface is not connected to use electric loading time, DC-DC transforming circuit quits work, when to direct current output interface access electric loading, low-power consumption start-up circuit can trigger whole power supply adaptor and enter normal mode of operation, direct current after DC-DC transforming circuit output transformation, external direct current power supply passes through this power supply adaptor to electricity consumption load supplying.This case only has the power consumption of low-power consumption start-up circuit when battery saving mode, and low-power consumption start-up circuit is little from power consumption, effectively saves the electric energy of external direct current power supply, prolongs standby time.
Description
[technical field]
The present invention relates to a kind of DC-DC power source adapter.
[background technology]
Along with the change of people's living standard, various digital products gets more and more, along with the function increasing action of large-size screen monitors smart mobile phone is increasing, use also further frequent, the service time of battery is just shorter and shorter, the digital products such as mobile phone may be run into and do not have electricity, and outing or to drive etc. the having battery pack of high voltage large capcity will just be unable to do without power supply adaptor to digital product charging by bike out of doors, present various power supply adaptor is be built in dynamic lithium battery group as being built in battery of electric bicycle group inside a bit, some needs external power adapter, but power supply adaptor come what may itself has from power consumption, and power adapter circuit power consumption is general all at milliampere rank (2-3mA), power consumption is large, the battery pack of a 10Ah is connected with power supply adaptor, without external electric loading, even if the full electricity of battery pack itself also can having remained little at six months internal consumption.
Therefore, be necessary to solve as above problem.
[summary of the invention]
Instant invention overcomes the deficiency of above-mentioned technology, provide a kind of DC-DC power source adapter, its design is ingenious, has without power-saving control function during external electric loading, effectively reduces stand-by power consumption during useless electric loading.
For achieving the above object, present invention employs following technical proposal:
A kind of DC-DC power source adapter, include the direct current input interface 1 connected in turn for external direct current power supply, DC-DC transforming circuit 2, and for galvanic direct current output interface 3 after exporting transformation, the controlled positive pole output switch circuit 4 for disconnecting when the conducting when DC-DC transforming circuit 2DC-DC transformation and non-DC-DC transformation is connected with between described DC-DC transforming circuit 2 cathode output end and direct current output interface 3 anode connection terminal, the controlled negative pole output switch circuit 5 for disconnecting when the conducting when DC-DC transforming circuit 2DC-DC transformation and non-DC-DC transformation is connected with between DC-DC transforming circuit 2 cathode output end and direct current output interface 3 negative pole link, described controlled negative pole output switch circuit 5 control signal input is connected with DC-DC transforming circuit 2 cathode output end, be connected with for being connected to conducting during electric loading and the controlled input switching circuit 6 that is not connected to disconnecting during electric loading at direct current output interface 3 between described direct current input interface 1 and DC-DC transforming circuit 2, described controlled input switching circuit 6 control signal input is connected with direct current output interface 3 negative pole link, described direct current input interface 1 is also connected with the low-power consumption start-up circuit 7 for being connected at direct current output interface 3 with driving the conducting of controlled input switching circuit 6 during electric loading, described low-power consumption start-up circuit 7 enabling signal output is connected with direct current output interface 3 anode connection terminal, also be connected with between described direct current input interface 1 and DC-DC transforming circuit 2 and detect DC-DC transforming circuit 2 input size of current for being connected at direct current output interface 3 with maintaining the conducting of controlled input switching circuit 6 during electric loading and controlling the conducting of controlled positive pole output switch circuit 4, and the current detecting and control circuit 8 that disconnect with the controlled positive pole output switch circuit 4 of electric loading time control system is not connected at direct current output interface 3, described current detecting and control circuit 8 control signal output are connected with controlled positive pole output switch circuit 4 control signal input, current detecting and control circuit 8 maintain signal output part and maintain signal input part with controlled input switching circuit 6 and be connected.
Described DC-DC transforming circuit 2 adopts chip model to be the DC-DC voltage conversion circuit of LM25010.
Described controlled positive pole output switch circuit 4 includes PMOS Q6, NMOS tube Q2, resistance R20 ~ R22, and electric capacity C15, the drain electrode of described PMOS Q6 is connected with DC-DC transforming circuit 2 cathode output end as controlled positive pole output switch circuit 4 switch one link, be connected with direct current output interface 3 anode connection terminal as controlled another link of positive pole output switch circuit 4 switch after the source electrode of PMOS Q6 is connected with resistance R20 one end, be connected with the drain electrode of NMOS tube Q2 by resistance R21 after the grid of PMOS Q6 is connected with the resistance R20 other end, the source electrode of NMOS tube Q2 and resistance R22 one end, be connected with direct current input interface 1 negative pole link after electric capacity C15 one end is connected, the grid of NMOS tube Q2 and the resistance R22 other end, be connected with current detecting and control circuit 8 control signal output as controlled positive pole output switch circuit 4 control signal input after the electric capacity C15 other end is connected.
Described controlled negative pole output switch circuit 5 includes NMOS tube Q4, resistance R9 ~ R10, and electric capacity C11, the source electrode of described NMOS tube Q4 and resistance R9 one end, be connected with DC-DC transforming circuit 2 cathode output end as controlled negative pole output switch circuit 5 switch one link after electric capacity C11 one end is connected, the drain electrode of NMOS tube Q4 is connected with direct current output interface 3 negative pole link as controlled another link of negative pole output switch circuit 5 switch, the grid of NMOS tube Q4 and the resistance R9 other end, the electric capacity C11 other end, resistance R10 one end is connected, the resistance R10 other end is connected with DC-DC transforming circuit 2 cathode output end as controlled negative pole output switch circuit 5 control signal input.
Current detecting as above and control circuit 8 are connected between direct current input interface 1 and controlled input switching circuit 6.
Described controlled input switching circuit 6 includes PMOS Q5, NMOS tube Q3, resistance R5 ~ R8, voltage-stabiliser tube ZD2, diode D3, and electric capacity C10, described PMOS Q5 source electrode and voltage-stabiliser tube ZD2 negative pole, be connected with current detecting and control circuit 8 current output terminal as controlled input switching circuit 6 switch one link after resistance R6 one end is connected, PMOS Q5 drain electrode is connected with DC-DC transforming circuit 2 electrode input end as controlled another link of input switching circuit 6 switch, DC-DC transforming circuit 2 negative input connects direct current input interface 1 negative pole link, PMOS Q5 grid and resistance R6 one end, voltage-stabiliser tube ZD2 positive pole, resistance R5 one end is connected, the resistance R6 other end is connected with direct current input interface 1 anode connection terminal, the resistance R5 other end drains with NMOS tube Q3 and is connected, NMOS tube Q3 source electrode and resistance R7 one end, electric capacity C10 one end, be connected with direct current input interface 1 negative pole link after resistance R8 one end is connected, NMOS tube Q3 grid and the resistance R7 other end, the electric capacity C10 other end, maintain signal input part as controlled input switching circuit 6 after diode D3 negative pole is connected to maintain signal output part with current detecting and control circuit 8 and be connected, diode D3 positive pole is connected with direct current output interface 3 negative pole link as controlled input switching circuit 6 control signal input.
Described low-power consumption start-up circuit 7 includes resistance R2, resistance R12, electric capacity C5, voltage-stabiliser tube ZD1, and diode D6, described resistance R2 one end is connected with direct current input interface 1 anode connection terminal, the resistance R2 other end and voltage-stabiliser tube ZD1 negative pole, diode D6 positive pole is connected, be connected with direct current input interface 1 negative pole link after voltage-stabiliser tube ZD1 positive pole is connected with electric capacity C5 one end, the electric capacity C5 other end is connected with resistance R12 one end, be connected with direct current output interface 3 anode connection terminal as low-power consumption start-up circuit 7 enabling signal output after the resistance R12 other end is connected with diode D6 negative pole.
Described current detecting and control circuit 8 include diode D5, resistance R1, resistance R3 ~ R4, PNP triode Q1, and diode D1 ~ D2, described diode D5 positive pole and resistance R1 one end, be connected with direct current input interface 1 anode connection terminal as current detecting and control circuit 8 current input terminal after PNP triode Q1 emitter is connected, diode D5 negative pole and the resistance R1 other end, be connected with controlled input switching circuit 6 switch one link as current detecting and control circuit 8 current output terminal after PNP triode Q1 base stage is connected, described PNP triode Q1 collector electrode is connected with resistance R3 one end, the resistance R3 other end and R4 one end, diode D1 positive pole, diode D2 positive pole is connected, the resistance R4 other end is connected with direct current input interface 1 negative pole link, described diode D1 negative pole is connected with controlled positive pole output switch circuit 4 control signal input as current detecting and control circuit 8 control signal output, described diode D2 negative pole maintains signal output part as current detecting and control circuit 8 and maintains signal input part with controlled input switching circuit 6 and be connected.
Described direct current output interface 3 is USB interface, and the VBUS+ of USB interface holds the anode connection terminal as direct current output interface 3, the VBUS-of USB interface to hold the negative pole link as direct current output interface 3.
Compared with prior art, the invention has the beneficial effects as follows:
1, design ingenious, have without power-saving control function during external electric loading, external direct current is inputted by direct current input interface, low-power consumption start-up circuit works, when direct current output interface is not connected to use electric loading time, controlled positive pole output switch circuit, controlled negative pole output switch circuit, controlled input switching circuit is all off state, the DC-DC transforming circuit be connected between direct current input interface and direct current output interface does not have electricity input and quit work, this power supply adaptor enters battery saving mode, low-power consumption start-up circuit is little from power consumption, the electric energy of effective saving external direct current power supply, prolongs standby time,
2, this power supply adaptor has the function automatically switched between standby electricity-saving mode and normal operation mode, when to direct current output interface access electric loading, first, low-power consumption start-up circuit is by being connected with controlled input switching circuit control signal input by electric loading, trigger controlled input switching circuit switch conduction, the connection of DC-DC transforming circuit and direct current input interface is switched on, DC-DC transforming circuit obtains electric work and carries out DC-DC transformation, the voltage signal that DC-DC transforming circuit cathode output end exports triggers controlled negative pole output switch circuit switch conduction, simultaneously, when DC-DC transforming circuit is started working, its power input electric current increases, trigger current detects and control circuit controls controlled positive pole output switch circuit switch conduction, DC-DC transforming circuit cathode output end is made to connect direct current output interface anode connection terminal, another aspect, although controlled input switching circuit control signal output will with direct current input interface negative pole link short circuit, but current detecting and control circuit maintenance signal output part maintain signal input part with controlled input switching circuit and are connected, it maintains the conducting of controlled input switching circuit, so, DC-DC transforming circuit has also been communicated with by electric loading, this power supply adaptor enters normal operation mode, external direct current power supply passes through this power supply adaptor to electricity consumption load supplying,
3, this power supply adaptor DC-DC transforming circuit cathode output end is connected with low-power consumption start-up circuit enabling signal output, direct current output interface anode connection terminal by controlled positive pole output switch circuit, so, when direct current output interface do not connect use electric loading time, controlled positive pole output switch circuit switch disconnects, low-power consumption start-up circuit by its enabling signal output to DC-DC transforming circuit cathode output end feedback voltage, can not make DC-DC transforming circuit not power consumption completely at this moment.
[accompanying drawing explanation]
Fig. 1 is the embodiment of the present invention 1 structure chart.
Fig. 2 is the embodiment of the present invention 1 circuit diagram.
Fig. 3 is the embodiment of the present invention 2 structure chart.
[embodiment]
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technical staff of the same trade:
Embodiment 1:
As shown in Figure 1-2,
A kind of DC-DC power source adapter, include the direct current input interface 1 connected in turn for external direct current power supply, DC-DC transforming circuit 2, and for galvanic direct current output interface 3 after exporting transformation, the controlled positive pole output switch circuit 4 for disconnecting when the conducting when DC-DC transforming circuit 2DC-DC transformation and non-DC-DC transformation is connected with between described DC-DC transforming circuit 2 cathode output end and direct current output interface 3 anode connection terminal, the controlled negative pole output switch circuit 5 for disconnecting when the conducting when DC-DC transforming circuit 2DC-DC transformation and non-DC-DC transformation is connected with between DC-DC transforming circuit 2 cathode output end and direct current output interface 3 negative pole link, described controlled negative pole output switch circuit 5 control signal input is connected with DC-DC transforming circuit 2 cathode output end, be connected with for being connected to conducting during electric loading and the controlled input switching circuit 6 that is not connected to disconnecting during electric loading at direct current output interface 3 between described direct current input interface 1 and DC-DC transforming circuit 2, described controlled input switching circuit 6 control signal input is connected with direct current output interface 3 negative pole link, described direct current input interface 1 is also connected with the low-power consumption start-up circuit 7 for being connected at direct current output interface 3 with driving the conducting of controlled input switching circuit 6 during electric loading, described low-power consumption start-up circuit 7 enabling signal output is connected with direct current output interface 3 anode connection terminal, also be connected with between described direct current input interface 1 and DC-DC transforming circuit 2 and detect DC-DC transforming circuit 2 input size of current for being connected at direct current output interface 3 with maintaining the conducting of controlled input switching circuit 6 during electric loading and controlling the conducting of controlled positive pole output switch circuit 4, and the current detecting and control circuit 8 that disconnect with the controlled positive pole output switch circuit 4 of electric loading time control system is not connected at direct current output interface 3, described current detecting and control circuit 8 control signal output are connected with controlled positive pole output switch circuit 4 control signal input, current detecting and control circuit 8 maintain signal output part and maintain signal input part with controlled input switching circuit 6 and be connected.
Described DC-DC transforming circuit 2 adopts chip model to be the DC-DC voltage conversion circuit of LM25010.
Described controlled positive pole output switch circuit 4 includes PMOS Q6, NMOS tube Q2, resistance R20 ~ R22, and electric capacity C15, the drain electrode of described PMOS Q6 is connected with DC-DC transforming circuit 2 cathode output end as controlled positive pole output switch circuit 4 switch one link, be connected with direct current output interface 3 anode connection terminal as controlled another link of positive pole output switch circuit 4 switch after the source electrode of PMOS Q6 is connected with resistance R20 one end, be connected with the drain electrode of NMOS tube Q2 by resistance R21 after the grid of PMOS Q6 is connected with the resistance R20 other end, the source electrode of NMOS tube Q2 and resistance R22 one end, be connected with direct current input interface 1 negative pole link after electric capacity C15 one end is connected, the grid of NMOS tube Q2 and the resistance R22 other end, be connected with current detecting and control circuit 8 control signal output as controlled positive pole output switch circuit 4 control signal input after the electric capacity C15 other end is connected.
Described controlled negative pole output switch circuit 5 includes NMOS tube Q4, resistance R9 ~ R10, and electric capacity C11, the source electrode of described NMOS tube Q4 and resistance R9 one end, be connected with DC-DC transforming circuit 2 cathode output end as controlled negative pole output switch circuit 5 switch one link after electric capacity C11 one end is connected, the drain electrode of NMOS tube Q4 is connected with direct current output interface 3 negative pole link as controlled another link of negative pole output switch circuit 5 switch, the grid of NMOS tube Q4 and the resistance R9 other end, the electric capacity C11 other end, resistance R10 one end is connected, the resistance R10 other end is connected with DC-DC transforming circuit 2 cathode output end as controlled negative pole output switch circuit 5 control signal input.
Described current detecting and control circuit 8 are connected between direct current input interface 1 and controlled input switching circuit 6.
Described controlled input switching circuit 6 includes PMOS Q5, NMOS tube Q3, resistance R5 ~ R8, voltage-stabiliser tube ZD2, diode D3, and electric capacity C10, described PMOS Q5 source electrode and voltage-stabiliser tube ZD2 negative pole, be connected with current detecting and control circuit 8 current output terminal as controlled input switching circuit 6 switch one link after resistance R6 one end is connected, PMOS Q5 drain electrode is connected with DC-DC transforming circuit 2 electrode input end as controlled another link of input switching circuit 6 switch, DC-DC transforming circuit 2 negative input connects direct current input interface 1 negative pole link, PMOS Q5 grid and resistance R6 one end, voltage-stabiliser tube ZD2 positive pole, resistance R5 one end is connected, the resistance R6 other end is connected with direct current input interface 1 anode connection terminal, the resistance R5 other end drains with NMOS tube Q3 and is connected, NMOS tube Q3 source electrode and resistance R7 one end, electric capacity C10 one end, be connected with direct current input interface 1 negative pole link after resistance R8 one end is connected, NMOS tube Q3 grid and the resistance R7 other end, the electric capacity C10 other end, maintain signal input part as controlled input switching circuit 6 after diode D3 negative pole is connected to maintain signal output part with current detecting and control circuit 8 and be connected, diode D3 positive pole is connected with direct current output interface 3 negative pole link as controlled input switching circuit 6 control signal input.
Described low-power consumption start-up circuit 7 includes resistance R2, resistance R12, electric capacity C5, voltage-stabiliser tube ZD1, and diode D6, described resistance R2 one end is connected with direct current input interface 1 anode connection terminal, the resistance R2 other end and voltage-stabiliser tube ZD1 negative pole, diode D6 positive pole is connected, be connected with direct current input interface 1 negative pole link after voltage-stabiliser tube ZD1 positive pole is connected with electric capacity C5 one end, the electric capacity C5 other end is connected with resistance R12 one end, be connected with direct current output interface 3 anode connection terminal as low-power consumption start-up circuit 7 enabling signal output after the resistance R12 other end is connected with diode D6 negative pole.
Described current detecting and control circuit 8 include diode D5, resistance R1, resistance R3 ~ R4, PNP triode Q1, and diode D1 ~ D2, described diode D5 positive pole and resistance R1 one end, be connected with direct current input interface 1 anode connection terminal as current detecting and control circuit 8 current input terminal after PNP triode Q1 emitter is connected, diode D5 negative pole and the resistance R1 other end, be connected with controlled input switching circuit 6 switch one link as current detecting and control circuit 8 current output terminal after PNP triode Q1 base stage is connected, described PNP triode Q1 collector electrode is connected with resistance R3 one end, the resistance R3 other end and R4 one end, diode D1 positive pole, diode D2 positive pole is connected, the resistance R4 other end is connected with direct current input interface 1 negative pole link, described diode D1 negative pole is connected with controlled positive pole output switch circuit 4 control signal input as current detecting and control circuit 8 control signal output, described diode D2 negative pole maintains signal output part as current detecting and control circuit 8 and maintains signal input part with controlled input switching circuit 6 and be connected.
Described direct current output interface 3 is USB interface, and the VBUS+ of USB interface holds the anode connection terminal as direct current output interface 3, the VBUS-of USB interface to hold the negative pole link as direct current output interface 3.
Operation principle and the process of this power supply adaptor are as follows:
External direct current is inputted by direct current input interface 1, and low-power consumption start-up circuit 7 works.
Situation 1: when direct current output interface 3 does not have access electric loading, low-power consumption start-up circuit 7 could not by being connected with controlled input switching circuit 6 control signal input by electric loading, controlled input switching circuit 6, controlled positive pole output switch circuit 4, controlled negative pole output switch circuit 5 are all in switch off state, and this adapter is in standby electricity-saving mode.
Situation 2: when to direct current output interface 3 access electric loading, first, low-power consumption start-up circuit 7 is by being connected with controlled input switching circuit 6 control signal input by electric loading, draw high the level of controlled input switching circuit 6 control signal input, trigger NMOS tube Q3 conducting on controlled input switching circuit 6, and C10 electric capacity time delay energy certain hour maintains NMOS tube Q3 conducting on controlled input switching circuit 6, on PMOS Q5 grid, voltage is drop-down by resistance R5 and NMOS tube Q3, cause PMOS Q5 conducting, DC-DC transforming circuit 2 power input obtains electric work and carries out DC-DC transformation, the voltage signal that DC-DC transforming circuit 2 cathode output end exports triggers NMOS tube Q4 conducting on controlled negative pole output switch circuit 5, direct current output interface 3 negative pole link connects DC-DC transforming circuit 2 cathode output end,
Simultaneously, when DC-DC transforming circuit 2 is started working, its power input electric current increases, resistance R1 both end voltage on current detecting and control circuit 8 is increased, namely between triode Q1 base stage and emitter, forward bias voltage increases, make triode Q1 conducting, pressure drop is produced between resistance R3 and resistance R4, trigger controlled positive pole output switch circuit 4NMOS pipe Q2 on the one hand, PMOS Q6 conducting, DC-DC transforming circuit 2 cathode output end is made to connect direct current output interface 3 anode connection terminal, another aspect, current detecting and control circuit 8 maintain signal output part and maintain signal input part with controlled input switching circuit 6 and be connected, maintain the conducting of controlled input switching circuit 6, so, DC-DC transforming circuit 2 has also been communicated with by electric loading, this power supply adaptor enters normal operation mode, external direct current power supply passes through this power supply adaptor to electricity consumption load supplying.
Situation 3: when pull out from direct current output interface 3 use electric loading time, circuit consumption current reduces, DC-DC transforming circuit 2 power input electric current reduces, on current detecting and control circuit 8, resistance R1 both end voltage reduces, namely between triode Q1 base stage and emitter, forward bias voltage reduces, triode Q1 is caused to end, absence of voltage on resistance R3, resistance R4, make NMOS tube Q2, PMOS Q6 cut-off on controlled positive pole output switch circuit 4, the connection of DC-DC transforming circuit 2 cathode output end and direct current output interface 3 anode connection terminal is disconnected;
Simultaneously, low-power consumption start-up circuit 7 could not by being connected with controlled input switching circuit 6 control signal input by electric loading, current detecting and control circuit 8 do not have ME for maintenance to NMOS tube Q3 grid input on controlled input switching circuit 6 yet, NMOS tube Q3 is caused to end, PMOS Q5 is caused also to end, DC-DC transforming circuit 2 is disconnected with the connection of direct current input interface 1, DC-DC transforming circuit 2 does not have electricity input and stops DC-DC transformation, DC-DC transforming circuit 2 cathode output end no-output voltage, make NMOS tube Q4 cut-off on controlled negative pole output switch circuit 5, the connection of DC-DC transforming circuit 2 cathode output end and direct current output interface 3 negative pole link is disconnected, so, this power supply adaptor enters standby electricity-saving mode again.
As shown in Figure 2, the consumable electric current of R2 is flowed through in low-power consumption start-up circuit 7
when the Vin of input DC power is between 6-42V, consumable electric current I effectively drops to a microampere rank, effectively saves the electric energy of external direct current power supply, prolongs standby time.
As mentioned above, when for a long time not using this power supply adaptor to electricity consumption load supplying, can by direct current input interface 1 and external direct current as battery components from.
Embodiment 2:
As shown in Figure 3, difference is compared with embodiment 1, in the present embodiment 2, current detecting and control circuit 8 are connected between controlled input switching circuit 6 and DC-DC transforming circuit 2, its also can control when DC-DC transforming circuit 2 non-DC-DC transformation controlled positive pole output switch circuit 4 disconnect and in 5 conducting of controlled negative pole output switch circuit time maintain the conducting of controlled input switching circuit 6.
As mentioned above, what this case was protected is a kind of DC-DC power source adapter, and all technical schemes identical or close with this case structure all should be shown for falling in the protection range of this case.
Claims (9)
1. a DC-DC power source adapter, it is characterized in that including the direct current input interface (1) connected in turn for external direct current power supply, DC-DC transforming circuit (2), and for galvanic direct current output interface (3) after exporting transformation, the controlled positive pole output switch circuit (4) for disconnecting when the conducting when DC-DC transforming circuit (2) DC-DC transformation and non-DC-DC transformation is connected with between described DC-DC transforming circuit (2) cathode output end and direct current output interface (3) anode connection terminal, the controlled negative pole output switch circuit (5) for disconnecting when the conducting when DC-DC transforming circuit (2) DC-DC transformation and non-DC-DC transformation is connected with between DC-DC transforming circuit (2) cathode output end and direct current output interface (3) negative pole link, described controlled negative pole output switch circuit (5) control signal input is connected with DC-DC transforming circuit (2) cathode output end, be connected with for being connected to conducting during electric loading and the controlled input switching circuit (6) that is not connected to disconnecting during electric loading at direct current output interface (3) between described direct current input interface (1) and DC-DC transforming circuit (2), described controlled input switching circuit (6) control signal input is connected with direct current output interface (3) negative pole link, described direct current input interface (1) is also connected with the low-power consumption start-up circuit (7) for being connected at direct current output interface (3) with driving controlled input switching circuit (6) conducting during electric loading, described low-power consumption start-up circuit (7) enabling signal output is connected with direct current output interface (3) anode connection terminal, also be connected with between described direct current input interface (1) and DC-DC transforming circuit (2) and detect DC-DC transforming circuit (2) input size of current for being connected at direct current output interface (3) with maintaining controlled input switching circuit (6) conducting during electric loading and controlling the conducting of controlled positive pole output switch circuit (4), and the current detecting and control circuit (8) that disconnect with the controlled positive pole output switch circuit (4) of electric loading time control system is not connected at direct current output interface (3), described current detecting and control circuit (8) control signal output are connected with controlled positive pole output switch circuit (4) control signal input, current detecting and control circuit (8) maintenance signal output part maintain signal input part with controlled input switching circuit (6) and are connected.
2. a kind of DC-DC power source adapter according to claim 1, is characterized in that described DC-DC transforming circuit (2) employing chip model is the DC-DC voltage conversion circuit of LM25010.
3. a kind of DC-DC power source adapter according to claim 1, it is characterized in that described controlled positive pole output switch circuit (4) includes PMOS Q6, NMOS tube Q2, resistance R20 ~ R22, and electric capacity C15, the drain electrode of described PMOS Q6 is connected with DC-DC transforming circuit (2) cathode output end as controlled positive pole output switch circuit (4) switch one link, be connected with direct current output interface (3) anode connection terminal as controlled another link of positive pole output switch circuit (4) switch after the source electrode of PMOS Q6 is connected with resistance R20 one end, be connected with the drain electrode of NMOS tube Q2 by resistance R21 after the grid of PMOS Q6 is connected with the resistance R20 other end, the source electrode of NMOS tube Q2 and resistance R22 one end, be connected with direct current input interface (1) negative pole link after electric capacity C15 one end is connected, the grid of NMOS tube Q2 and the resistance R22 other end, be connected with current detecting and control circuit (8) control signal output as controlled positive pole output switch circuit (4) control signal input after the electric capacity C15 other end is connected.
4. a kind of DC-DC power source adapter according to claim 1, it is characterized in that described controlled negative pole output switch circuit (5) includes NMOS tube Q4, resistance R9 ~ R10, and electric capacity C11, the source electrode of described NMOS tube Q4 and resistance R9 one end, be connected with DC-DC transforming circuit (2) cathode output end as controlled negative pole output switch circuit (5) switch one link after electric capacity C11 one end is connected, the drain electrode of NMOS tube Q4 is connected with direct current output interface (3) negative pole link as controlled another link of negative pole output switch circuit (5) switch, the grid of NMOS tube Q4 and the resistance R9 other end, the electric capacity C11 other end, resistance R10 one end is connected, the resistance R10 other end is connected with DC-DC transforming circuit (2) cathode output end as controlled negative pole output switch circuit (5) control signal input.
5. a kind of DC-DC power source adapter according to claim 1, is characterized in that described current detecting and control circuit (8) are connected between direct current input interface (1) and controlled input switching circuit (6).
6. a kind of DC-DC power source adapter according to claim 5, it is characterized in that described controlled input switching circuit (6) includes PMOS Q5, NMOS tube Q3, resistance R5 ~ R8, voltage-stabiliser tube ZD2, diode D3, and electric capacity C10, described PMOS Q5 source electrode and voltage-stabiliser tube ZD2 negative pole, be connected with current detecting and control circuit (8) current output terminal as controlled input switching circuit (6) switch one link after resistance R6 one end is connected, PMOS Q5 drain electrode is connected with DC-DC transforming circuit (2) electrode input end as another link of controlled input switching circuit (6) switch, DC-DC transforming circuit (2) negative input connects direct current input interface (1) negative pole link, PMOS Q5 grid and resistance R6 one end, voltage-stabiliser tube ZD2 positive pole, resistance R5 one end is connected, the resistance R6 other end is connected with direct current input interface (1) anode connection terminal, the resistance R5 other end drains with NMOS tube Q3 and is connected, NMOS tube Q3 source electrode and resistance R7 one end, electric capacity C10 one end, be connected with direct current input interface (1) negative pole link after resistance R8 one end is connected, NMOS tube Q3 grid and the resistance R7 other end, the electric capacity C10 other end, maintain signal output part as controlled input switching circuit (6) maintenance signal input part with current detecting and control circuit (8) after diode D3 negative pole is connected to be connected, diode D3 positive pole is connected with direct current output interface (3) negative pole link as controlled input switching circuit (6) control signal input.
7. a kind of DC-DC power source adapter according to claim 1, it is characterized in that described low-power consumption start-up circuit (7) includes resistance R2, resistance R12, electric capacity C5, voltage-stabiliser tube ZD1, and diode D6, described resistance R2 one end is connected with direct current input interface (1) anode connection terminal, the resistance R2 other end and voltage-stabiliser tube ZD1 negative pole, diode D6 positive pole is connected, be connected with direct current input interface (1) negative pole link after voltage-stabiliser tube ZD1 positive pole is connected with electric capacity C5 one end, the electric capacity C5 other end is connected with resistance R12 one end, be connected with direct current output interface (3) anode connection terminal as low-power consumption start-up circuit (7) enabling signal output after the resistance R12 other end is connected with diode D6 negative pole.
8. a kind of DC-DC power source adapter according to claim 5, it is characterized in that described current detecting and control circuit (8) include diode D5, resistance R1, resistance R3 ~ R4, PNP triode Q1, and diode D1 ~ D2, described diode D5 positive pole and resistance R1 one end, be connected with direct current input interface (1) anode connection terminal as current detecting and control circuit (8) current input terminal after PNP triode Q1 emitter is connected, diode D5 negative pole and the resistance R1 other end, be connected with controlled input switching circuit (6) switch one link as current detecting and control circuit (8) current output terminal after PNP triode Q1 base stage is connected, described PNP triode Q1 collector electrode is connected with resistance R3 one end, the resistance R3 other end and R4 one end, diode D1 positive pole, diode D2 positive pole is connected, the resistance R4 other end is connected with direct current input interface (1) negative pole link, described diode D1 negative pole is connected with controlled positive pole output switch circuit (4) control signal input as current detecting and control circuit (8) control signal output, described diode D2 negative pole maintains signal input part as current detecting and control circuit (8) maintenance signal output part with controlled input switching circuit (6) and is connected.
9. a kind of DC-DC power source adapter according to claim 1-8 any one, it is characterized in that described direct current output interface (3) is USB interface, the VBUS+ of USB interface holds the anode connection terminal as direct current output interface (3), the VBUS-of USB interface to hold the negative pole link as direct current output interface (3).
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| CN201410217685.5A CN103973101B (en) | 2014-05-22 | 2014-05-22 | A kind of DC-DC power source adapter |
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| CN201410217685.5A CN103973101B (en) | 2014-05-22 | 2014-05-22 | A kind of DC-DC power source adapter |
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| CN103973101A CN103973101A (en) | 2014-08-06 |
| CN103973101B true CN103973101B (en) | 2016-04-20 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201616771A (en) * | 2014-10-20 | 2016-05-01 | 和碩聯合科技股份有限公司 | Power adapter and electronic system using the same |
| CN104393747B (en) * | 2014-11-25 | 2017-05-31 | 广东金莱特电器股份有限公司 | It is a kind of to turn low-power consumption and under-voltage protection BOOST type DC DC converter circuits automatically |
| WO2017166265A1 (en) * | 2016-04-01 | 2017-10-05 | Intel Corporation | Reducing idle-time energy consumption in universal serial bus power delivery circuitry of power adapters |
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| CN203851022U (en) * | 2014-05-22 | 2014-09-24 | 中山市电赢科技有限公司 | Standby electricity-saving direct current power source adapter |
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| JP2001218280A (en) * | 2000-02-02 | 2001-08-10 | Sony Corp | Power supply unit for electronic equipment |
| CN103095115A (en) * | 2011-10-28 | 2013-05-08 | 鸿富锦精密工业（深圳）有限公司 | Power-supplying circuit |
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| US5161097A (en) * | 1991-11-12 | 1992-11-03 | Dia Semicon Systems Incorporated | Electric power unit |
| CN202565006U (en) * | 2012-04-14 | 2012-11-28 | 深圳市中电熊猫展盛科技有限公司 | Static zero-power energy-saving charging power supply with charging protection function |
| CN203491746U (en) * | 2013-09-22 | 2014-03-19 | 江门市朗达集团有限公司 | Intelligent control mobile power supply |
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Effective date of registration: 20240312 Address after: 528400, one of the workshop No.10, Yuyi Road, South China Modern Chinese medicine city, Nanlang Town, Zhongshan City, Guangdong Province Patentee after: ZHONGSHAN SHIBAO NEW ENERGY Co.,Ltd. Country or region after: China Address before: 528400 Building A, Linggang New Industrial Building, Torch Development Zone, Zhongshan City, Guangdong Province Patentee before: ZHONGSHAN POWER WING S & T CO.,LTD. Country or region before: China |