CN208986663U - A kind of quick charger automatically adjusting output voltage - Google Patents

Abstract

The utility model discloses a kind of quick chargers for automatically adjusting output voltage, including bridge rectifier filter circuit, absorbing circuit, circuit of synchronous rectification, feed back power supply circuit, leadage circuit, driving circuit, governor circuit and reception load information circuit, when leadage circuit, which accesses, to be loaded, governor circuit is after receiving load information circuit acquisition curent change information, the output voltage of leadage circuit is quickly increased by driving circuit, improve charge power, reduce the charging time, when leadage circuit does not load, leadage circuit consumes part output voltage, to be reduced to low pressure output, automatically adjust output voltage, it is more intelligent, it is safer, reduce stand-by power consumption, in addition, information of voltage needed for more acurrate acquisition electronic equipment charging interface and governor circuit is fed back to by absorbing circuit after circuit of synchronous rectification rectification, to master control electricity Road controls leadage circuit and exports more accurate voltage, effectively prevent the damage of electronic equipment internal electronic component low with charger charge rate.

Description

A kind of quick charger automatically adjusting output voltage

Technical field

The utility model relates to a kind of charge prepd, especially a kind of quick charger for automatically adjusting output voltage.

Background technique

As use demand of the user to mobile terminal is higher and higher, power consumption is also with increase, it usually needs uses Charger charges to it, in traditional charging scheme, charger to the mobile terminal that is accessed using fixed charging modes into Row charging, such as constant-voltage charge, but such charging modes charging time is long, is not able to satisfy consumer demand, and move After dynamic terminal charge completes, charger continues to keep constant voltage output, and stand-by power consumption is high, and safety is low.

In addition, charger, which needs first to detect, obtains electronic equipment charging interface institute when charger is that electronic equipment charges Required voltage feeds back to the governor circuit in charger, then by the automatically controlled adjusting charger of master control, output and electronic equipment interfaces The voltage to match, but during feedback information, due to being influenced by circuit internal electronic component, governor circuit is connect It receives between voltage value required for information of voltage and electronic equipment charging interface that there is a certain error, eventually leads to charger The voltage of output and voltage needed for electronic equipment charging interface are inconsistent, on the one hand can be to charger and electronic equipment internal Electronic component damage, on the other hand, also result in charge efficiency reduction.

Summary of the invention

For overcome the deficiencies in the prior art, the utility model provides that a kind of charge efficiency is high and uses safe automatic tune Save the quick charger of output voltage.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of quick charger automatically adjusting output voltage, including bridge rectifier filter circuit, the bridge rectifier filter Wave circuit is connected with absorbing circuit, circuit of synchronous rectification in turn, and the absorbing circuit is connected with feedback power supply circuit, the synchronization Rectification circuit is connected to leadage circuit, is connected with driving circuit, master control electricity between the absorbing circuit and feedback power supply circuit in turn Road is connected between the driving circuit and governor circuit and receives load information circuit.

The bridge rectifier filter circuit includes rectifier bridge BD1, fuse F1 and thermistor NTC1, inductance L1, resistance R1, polar capacitor EC1, polar capacitor EC2, resistance L2A, inductance L2 and polar capacitor EC3；The exchange of the rectifier bridge BD1 is defeated Enter that end 1 passes sequentially through the thermistor NTC1, fuse F1 starts to exchange fire line L；The ac input end 2 of the rectifier bridge BD1 connects zero Line N；The cathode output end of the rectifier bridge BD1 connects the input terminal of the absorbing circuit by the inductance L1；The rectifier bridge The cathode output end of BD1 is grounded by the inductance L2；The anode of the polar capacitor EC1 connects the anode of the rectifier bridge BD1 Node between output end and inductance L1, the cathode of the polar capacitor EC1 connect the cathode output end and electricity of the rectifier bridge BD1 Feel the node between L2；The anode of the polar capacitor EC2 connects the node between the input terminal of the absorbing circuit and inductance L1, The cathode of the polar capacitor EC2 connects the node between the inductance L2 and ground；A termination of the resistance R1 polarity electricity Hold the node between the anode and inductance L1 of EC1, another termination of resistance R1 inductance L1 and polar capacitor EC2 is just Node between pole；Node between the cathode and inductance L2 of a termination polar capacitor EC1 of the resistance L2A, it is described Node between another termination of resistance L2A inductance L2 and the cathode of polar capacitor EC2；The polar capacitor EC3 is just Pole connects the node between the inductance L1 and the input terminal of absorbing circuit, and the cathode of the polar capacitor EC3 meets the inductance L2 Node between ground.

The absorbing circuit includes capacitor C1, capacitor C11, resistance R2, resistance R3, diode D5 and transformer T1；It is described 1 pin of transformer T1 is grounded；2 pins of the transformer T1 connect the input terminal of the feedback power supply circuit；The transformer 3 pins of T1 connect the node between the inductance L1 and the anode of polar capacitor EC2；4 pins of the transformer T1 divide two-way, The anode of the diode D5 is connect all the way, and another way connects the driving circuit；5 pins of the transformer T1 connect it is described synchronize it is whole Current circuit；6 pins of the transformer T1 connect the leadage circuit；Draw the 3 of a termination transformer T1 of the resistance R2 Node between foot and inductance L1, the other end of the resistance R2 pass sequentially through the resistance R3 and connect the negative of the diode D5 Pole；Node between 3 pins and inductance L1 of a termination transformer T1 of the capacitor C1, the other end of the capacitor C1 The node between the resistance R2 and resistance R3 is connect by the capacitor C11.

The governor circuit includes main control chip U1, resistance R7, resistance R8, resistance R12, resistance R13, resistance R14, resistance R15, resistance R19, thermistor NTC2, capacitor C3, capacitor C4 and capacitor C5；A termination master control core of the resistance R12 1 pin of piece U1, the other end divide two-way, are grounded all the way by the capacitor C5, and another way passes sequentially through the resistance R13, electricity Resistance R19 connects the feedback power supply circuit；Node between a termination resistance R12 and capacitor C5 of the resistance R14, it is described Node between another termination of resistance R14 capacitor C5 and ground；2 pins of the main control chip U1 pass sequentially through the electricity Resistance R15, thermistor NTC2 connect the node between the capacitor C5 and ground；5 pins of the main control chip U1 connect the reception The output end of load information circuit；6 pins of the main control chip U1 connect the input terminal of the driving circuit；The main control chip 7 pins of U1 are grounded；8 pins of the main control chip U1 divide two-way, pass sequentially through described meet the resistance R8, resistance R7 all the way The node between the inductance L1 and 3 pins of transformer T1 is connect, another way connects the output end of the feedback power supply circuit；It is described Node between 8 pins of a termination main control chip U1 of capacitor C4 and the output end for feeding back power supply circuit, the capacitor Node between 7 pins and ground of another termination of C4 main control chip U1；A termination capacitor C4 of the capacitor C3 Node between 8 pins of main control chip U1,7 pins and the ground of another termination of capacitor C3 main control chip U1 Between node；The model of the main control chip U1 is IW1780H22.

The feedback power supply circuit includes diode D11, NPN type triode Q2, resistance R11, zener diode ZD1, electricity Hold C13, resistance R10, capacitor C12, resistance R28, diode D7 and resistance R29；The cathode of the diode D11 connects the master control Node between 8 pins and capacitor C4 of chip U1；The anode of the diode D11 connects the transmitting of the NPN type triode Q2 Pole；The cathode of the diode D7 connects the collector of the NPN type triode Q2 by the resistance R10；The diode D7 Anode divide two-way, pass sequentially through the resistance R19 all the way, resistance R13 connects node between the capacitor C5 and resistance R12, Another way connects 2 pins of the transformer T1 by the resistance R27；A termination resistance R19 and two of the resistance R28 The other end of node between the anode of pole pipe D7, the resistance R28 meets the resistance R10 and NPN type by the capacitor C12 Node between the collector of triode Q2；The cathode of the zener diode ZD1 connects the base stage of the NPN type triode Q2, The anode of the zener diode ZD1 connects the node between 1 pin and ground of the transformer T1；One end of the resistance R11 Connect the node between the collector and resistance R10 of the NPN type triode Q2, another termination NPN type of the resistance R11 Node between the base stage of triode Q2 and the cathode of zener diode ZD1；A termination NPN type three of the capacitor C13 Node between the collector and resistance R10 of pole pipe Q2, another termination of capacitor C13 zener diode ZD1 is just Node between pole and ground.

The driving circuit includes metal-oxide-semiconductor Q1, capacitor C6, resistance R16, resistance R17, resistance R20 and diode D6；It is described The drain electrode of metal-oxide-semiconductor Q1 connects the node between the anode of the diode D5 and 4 pins of transformer T1；The grid of the metal-oxide-semiconductor Q1 Pole connects 6 pins of the main control chip U1 by the resistance R17；The source electrode of the metal-oxide-semiconductor Q1 connects the reception load information The input terminal of circuit；The anode of the diode D6 divides two-way, is connect between the grid and resistance R17 of the metal-oxide-semiconductor Q1 all the way Node, another way by the resistance R20 connect it is described receive load information circuit input terminal and the metal-oxide-semiconductor Q1 source electrode it Between node；The cathode of the diode D6 by the resistance R16 connect the main control chip U1 6 pins and resistance R17 it Between node；Node between the drain electrode of a termination metal-oxide-semiconductor Q1 and the anode of diode D5 of the capacitor C3, the electricity Hold the node between the grid and resistance R17 of another termination metal-oxide-semiconductor Q1 of C3.

The reception load information circuit includes resistance R4, resistance R5, resistance R6 and the resistance R18；The resistance R6 A termination resistance R20 and the source electrode of metal-oxide-semiconductor Q1 between node, the other end ground connection of the resistance R6；The resistance 5 pins of a termination main control chip U1 of R18, the source of another termination of the resistance R18 resistance R6 and metal-oxide-semiconductor Q1 Node between pole；Node between a termination resistance R18 and resistance R6 of the resistance R4, the resistance R4's is another Terminate the node between the resistance R6 and ground；Node between a termination resistance R18 and resistance R6 of the resistance R5, Node between another termination of resistance R5 resistance R4 and ground.

The circuit of synchronous rectification includes rectification chip U2, resistance R9, resistance R21, resistance R27, resistance R22, metal-oxide-semiconductor Q3, capacitor C7, capacitor C8 and capacitor C10；The grid of the metal-oxide-semiconductor Q3 connects the 3 of the rectification chip U2 by the resistance R22 Pin；The drain electrode of the metal-oxide-semiconductor Q3 connects 5 pins of the transformer T1；The source electrode of the metal-oxide-semiconductor Q3 connects the leadage circuit Output end；1 pin of a termination rectification chip U2 of the resistance R21, another termination MOS of the resistance R21 Node between the drain electrode of pipe Q3 and 5 pins of transformer T1；Two-way is divided in one end of the resistance R9, passes through the resistance all the way R27 connects the leadage circuit, and another way connects the node between the drain electrode of the metal-oxide-semiconductor Q3 and 5 pins of transformer T1, the electricity The other end of resistance R9 connects the node between the source electrode of the metal-oxide-semiconductor Q3 and the output end of leadage circuit by the capacitor C10；Institute 2 pins for stating rectification chip U2 connect node between the source electrode and capacitor C10 of the metal-oxide-semiconductor Q3；The GND of the rectification chip U2 Pin connects the node between the source electrode of the metal-oxide-semiconductor Q3 and the output end of leadage circuit；The VIN pin of the rectification chip U2 is logical It crosses the capacitor C7 and connects node between the source electrode of the metal-oxide-semiconductor Q3 and the GND pin of rectification chip U2；The rectification chip U2 VCC pin the node between the source electrode of the metal-oxide-semiconductor Q3 and the GND pin of rectification chip U2 is connect by the capacitor C8.

The leadage circuit includes polar capacitor EC4, polar capacitor EC5, resistance R24, resistance R23, capacitor C9, resistance R26, diode D10, diode D9, diode D8, zener diode ZD2, NPN type triode Q4, resistance R25 and interface USB； 1 pin of the interface USB connects 6 pins of the transformer T1；The D+ pin of the interface USB meets the D- of the interface USB Pin；4 pins of the interface USB connect the source electrode of the metal-oxide-semiconductor Q3；The anode of the polar capacitor EC4 connects the transformer Node between 6 pins of T1 and 1 pin of interface USB, the cathode of the polar capacitor EC4 connect the source electrode of the metal-oxide-semiconductor Q3 Node between 4 pins of interface USB；The anode of the polar capacitor EC5 connects 6 pins and interface of the transformer T1 Node between 1 pin of USB, the cathode of the polar capacitor EC5 connect the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB Between node；Node between 6 pins of a termination transformer T1 and 1 pin of interface USB of the resistance R24, Node between the source electrode of another termination of resistance R24 metal-oxide-semiconductor Q3 and 4 pins of interface USB；The resistance R23 6 pins of a termination transformer T1 and 1 pin of interface USB between node, another termination institute of the resistance R23 State the node between the VIN pin of rectification chip U2 and capacitor C7；The cathode of the zener diode ZD2 meets the transformer T1 6 pins and interface USB 1 pin between node, the anode of the zener diode ZD2 meets the NPN type triode Q4 Collector；The anode of the diode D10 connects 6 pins of the transformer T1 and 1 drawing for interface USB by the capacitor C9 Node between foot, the cathode of the diode D10 connect the section between the resistance R9 and resistance R21 by the resistance R27 Point；The anode of the diode D8 is connect by the resistance R26 between 6 pins of the transformer T1 and 1 pin of interface USB Node；The cathode of the diode D8 connects the anode of the diode D9；The cathode of the diode D9 meets the metal-oxide-semiconductor Q3 Source electrode and interface USB 4 pins between node；The base stage of the NPN type triode Q4 connects the resistance R26 and diode Node between the anode of D8；The emitter of the NPN type triode Q4 connects the source of the metal-oxide-semiconductor Q3 by the resistance R25 Node between pole and 4 pins of interface USB；Node between the resistance R26 and the anode of diode D8 connects the capacitor Node between C9 and the anode of diode D10；Node between the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB connects Ground.

The beneficial effects of the utility model are: the feedback power supply circuit of the utility model is governor circuit power supply, when releasing When circuit access load, governor circuit is quick by driving circuit after receiving load information circuit acquisition curent change information The output voltage of leadage circuit is increased, charge power is improved, reduces the charging time, when leadage circuit does not load, vent discharge Road consumes part output voltage, to be reduced to low pressure output, automatically adjusts output voltage, more intelligent, safer, reduces standby function Consumption.

In addition, information of voltage needed for more acurrate acquisition electronic equipment charging interface and passing through after circuit of synchronous rectification rectification Absorbing circuit feeds back to governor circuit, so that governor circuit control leadage circuit exports more accurate voltage, effectively prevent electronics The damage of equipment internal electronic component is low with charger charge rate.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the circuit block diagram of the utility model；

Fig. 2 is the circuit diagram of the utility model.

Specific embodiment

Referring to Fig.1, Fig. 2, a kind of quick charger automatically adjusting output voltage, including bridge rectifier filter circuit, institute It states bridge rectifier filter circuit and is connected with absorbing circuit, circuit of synchronous rectification in turn, the absorbing circuit is connected with feedback power supply Circuit, the circuit of synchronous rectification are connected to leadage circuit, are connected with drive in turn between the absorbing circuit and feedback power supply circuit Dynamic circuit, governor circuit, are connected between the driving circuit and governor circuit and receive load information circuit；When leadage circuit accesses When load, after governor circuit is by receiving load information circuit acquisition curent change information, governor circuit is fast by driving circuit Speed increases the output voltage of leadage circuit, improves charge power, to improve charging rate, the charging time is shorter, works as vent discharge When road does not load, output is directly quickly reduced to low pressure by leadage circuit, safer, reduces stand-by power consumption, automatic adjustment output Voltage, it is more intelligent.

The bridge rectifier filter circuit includes rectifier bridge BD1, fuse F1 and thermistor NTC1, inductance L1, resistance R1, polar capacitor EC1, polar capacitor EC2, resistance L2A, inductance L2 and polar capacitor EC3；The exchange of the rectifier bridge BD1 is defeated Enter that end 1 passes sequentially through the thermistor NTC1, fuse F1 starts to exchange fire line L；The ac input end 2 of the rectifier bridge BD1 connects zero Line N；The cathode output end of the rectifier bridge BD1 connects the input terminal of the absorbing circuit by the inductance L1；The rectifier bridge The cathode output end of BD1 is grounded by the inductance L2；The anode of the polar capacitor EC1 connects the anode of the rectifier bridge BD1 Node between output end and inductance L1, the cathode of the polar capacitor EC1 connect the cathode output end and electricity of the rectifier bridge BD1 Feel the node between L2；The anode of the polar capacitor EC2 connects the node between the input terminal of the absorbing circuit and inductance L1, The cathode of the polar capacitor EC2 connects the node between the inductance L2 and ground；A termination of the resistance R1 polarity electricity Hold the node between the anode and inductance L1 of EC1, another termination of resistance R1 inductance L1 and polar capacitor EC2 is just Node between pole；Node between the cathode and inductance L2 of a termination polar capacitor EC1 of the resistance L2A, it is described Node between another termination of resistance L2A inductance L2 and the cathode of polar capacitor EC2；The polar capacitor EC3 is just Pole connects the node between the inductance L1 and the input terminal of absorbing circuit, and the cathode of the polar capacitor EC3 meets the inductance L2 Node between ground；The alternating current of input is become the direct current of pulsation by the bridge rectifier filter circuit, then pulsation Direct current become smooth direct current, it is more stable.

The absorbing circuit includes capacitor C1, capacitor C11, resistance R2, resistance R3, diode D5 and transformer T1；It is described 1 pin of transformer T1 is grounded；2 pins of the transformer T1 connect the input terminal of the feedback power supply circuit；The transformer 3 pins of T1 connect the node between the inductance L1 and the anode of polar capacitor EC2；4 pins of the transformer T1 divide two-way, The anode of the diode D5 is connect all the way, and another way connects the driving circuit；5 pins of the transformer T1 connect it is described synchronize it is whole Current circuit；6 pins of the transformer T1 connect the leadage circuit；Draw the 3 of a termination transformer T1 of the resistance R2 Node between foot and inductance L1, the other end of the resistance R2 pass sequentially through the resistance R3 and connect the negative of the diode D5 Pole；Node between 3 pins and inductance L1 of a termination transformer T1 of the capacitor C1, the other end of the capacitor C1 The node between the resistance R2 and resistance R3 is connect by the capacitor C11；When the moment of charger power-off, the absorbing circuit Resistance R2 and resistance R3 consumption charger internal remnants electric energy, protect the electronic component of charger internal safe.

The governor circuit includes main control chip U1, resistance R7, resistance R8, resistance R12, resistance R13, resistance R14, resistance R15, resistance R19, thermistor NTC2, capacitor C3, capacitor C4 and capacitor C5；A termination master control core of the resistance R12 1 pin of piece U1, the other end divide two-way, are grounded all the way by the capacitor C5, and another way passes sequentially through the resistance R13, electricity Resistance R19 connects the feedback power supply circuit；Node between a termination resistance R12 and capacitor C5 of the resistance R14, it is described Node between another termination of resistance R14 capacitor C5 and ground；2 pins of the main control chip U1 pass sequentially through the electricity Resistance R15, thermistor NTC2 connect the node between the capacitor C5 and ground；5 pins of the main control chip U1 connect the reception The output end of load information circuit；6 pins of the main control chip U1 connect the input terminal of the driving circuit；The main control chip 7 pins of U1 are grounded；8 pins of the main control chip U1 divide two-way, pass sequentially through described meet the resistance R8, resistance R7 all the way The node between the inductance L1 and 3 pins of transformer T1 is connect, another way connects the output end of the feedback power supply circuit；It is described Node between 8 pins of a termination main control chip U1 of capacitor C4 and the output end for feeding back power supply circuit, the capacitor Node between 7 pins and ground of another termination of C4 main control chip U1；A termination capacitor C4 of the capacitor C3 Node between 8 pins of main control chip U1,7 pins and the ground of another termination of capacitor C3 main control chip U1 Between node；The governor circuit can control the voltage output of leadage circuit, when the leadage circuit access loads, the master It controls circuit and recognizes that the leadage circuit has accessed load by the reception feedback information circuit, to quickly improve vent discharge The output voltage on road reduces the charging time to improve charge power.

The feedback power supply circuit includes diode D11, NPN type triode Q2, resistance R11, zener diode ZD1, electricity Hold C13, resistance R10, capacitor C12, resistance R28, diode D7 and resistance R29；The cathode of the diode D11 connects the master control Node between 8 pins and capacitor C4 of chip U1；The anode of the diode D11 connects the transmitting of the NPN type triode Q2 Pole；The cathode of the diode D7 connects the collector of the NPN type triode Q2 by the resistance R10；The diode D7 Anode divide two-way, pass sequentially through the resistance R19 all the way, resistance R13 connects node between the capacitor C5 and resistance R12, Another way connects 2 pins of the transformer T1 by the resistance R27；A termination resistance R19 and two of the resistance R28 The other end of node between the anode of pole pipe D7, the resistance R28 meets the resistance R10 and NPN type by the capacitor C12 Node between the collector of triode Q2；The cathode of the zener diode ZD1 connects the base stage of the NPN type triode Q2, The anode of the zener diode ZD1 connects the node between 1 pin and ground of the transformer T1；One end of the resistance R11 Connect the node between the collector and resistance R10 of the NPN type triode Q2, another termination pressure stabilizing of the resistance R11 Node between the anode and ground of diode ZD1；The feedback power supply circuit can power for the governor circuit, recycle Electric energy saves electric energy.

The driving circuit includes metal-oxide-semiconductor Q1, capacitor C6, resistance R16, resistance R17, resistance R20 and diode D6；It is described The drain electrode of metal-oxide-semiconductor Q1 connects the node between the anode of the diode D5 and 4 pins of transformer T1；The grid of the metal-oxide-semiconductor Q1 Pole connects 6 pins of the main control chip U1 by the resistance R17；The source electrode of the metal-oxide-semiconductor Q1 connects the reception load information The input terminal of circuit；The anode of the diode D6 divides two-way, is connect between the grid and resistance R17 of the metal-oxide-semiconductor Q1 all the way Node, another way by the resistance R20 connect it is described receive load information circuit input terminal and the metal-oxide-semiconductor Q1 source electrode it Between node；The cathode of the diode D6 by the resistance R16 connect the main control chip U1 6 pins and resistance R17 it Between node；Node between the drain electrode of a termination metal-oxide-semiconductor Q1 and the anode of diode D5 of the capacitor C3, the electricity Hold the node between the grid and resistance R17 of another termination metal-oxide-semiconductor Q1 of C3；The governor circuit passes through the driving electricity Road controls the voltage between 5 pins and 6 pins of the transformer T1；The reception load information circuit includes resistance R4, electricity Hinder R5, resistance R6 and the resistance R18；Section between the termination resistance R20 and the source electrode of metal-oxide-semiconductor Q1 of the resistance R6 Point, the other end ground connection of the resistance R6；5 pins of a termination main control chip U1 of the resistance R18, the resistance Node between another termination of R18 resistance R6 and the source electrode of metal-oxide-semiconductor Q1；The termination resistance of the resistance R4 Node between R18 and resistance R6, the node between another termination of resistance R4 resistance R6 and ground；The resistance R5 A termination resistance R18 and resistance R6 between node, between another termination of resistance R5 resistance R4 and ground Node；The governor circuit controls the output voltage of the leadage circuit by the driving circuit；The governor circuit is logical It crosses after the reception load information circuit obtains curent change information by the transformer T1 and whether understands the leadage circuit Load has been accessed, to decide whether to increase the output voltage of the leadage circuit, has improved charge power to improve charging speed Degree, it is more intelligent.

The circuit of synchronous rectification includes rectification chip U2, resistance R9, resistance R21, resistance R27, resistance R22, metal-oxide-semiconductor Q3, capacitor C7, capacitor C8 and capacitor C10；The grid of the metal-oxide-semiconductor Q3 connects the 3 of the rectification chip U2 by the resistance R22 Pin；The drain electrode of the metal-oxide-semiconductor Q3 connects 5 pins of the transformer T1；The source electrode of the metal-oxide-semiconductor Q3 connects the leadage circuit Output end；1 pin of a termination rectification chip U2 of the resistance R21, another termination MOS of the resistance R21 Node between the drain electrode of pipe Q3 and 5 pins of transformer T1；Two-way is divided in one end of the resistance R9, passes through the resistance all the way R27 connects the leadage circuit, and another way connects the node between the drain electrode of the metal-oxide-semiconductor Q3 and 5 pins of transformer T1, the electricity The other end of resistance R9 connects the node between the source electrode of the metal-oxide-semiconductor Q3 and the output end of leadage circuit by the capacitor C10；Institute 2 pins for stating rectification chip U2 connect node between the source electrode and capacitor C10 of the metal-oxide-semiconductor Q3；The GND of the rectification chip U2 Pin connects the node between the source electrode of the metal-oxide-semiconductor Q3 and the output end of leadage circuit；The VIN pin of the rectification chip U2 is logical It crosses the capacitor C7 and connects node between the source electrode of the metal-oxide-semiconductor Q3 and the GND pin of rectification chip U2；The rectification chip U2 VCC pin the node between the source electrode of the metal-oxide-semiconductor Q3 and the GND pin of rectification chip U2 is connect by the capacitor C8；Institute It states circuit of synchronous rectification and greatly reduces the rectifier loss of charger, to improve transfer efficiency, prevent charger from generating heat；It is same with this When, the voltage required for more acurrate acquisition electronic equipment charging interface after circuit of synchronous rectification rectifies, then by described Transformer T1 feedback information gives the governor circuit, thus required for the output voltage of governor circuit and electronic equipment charging interface Voltage match, prevent the electronic component to charger and electronic equipment internal damage and charge efficiency drop It is low.

The leadage circuit includes polar capacitor EC4, polar capacitor EC5, resistance R24, resistance R23, capacitor C9, resistance R26, diode D10, diode D9, diode D8, zener diode ZD2, NPN type triode Q4, resistance R25 and interface USB； 1 pin of the interface USB connects 6 pins of the transformer T1；The D+ pin of the interface USB meets the D- of the interface USB Pin；4 pins of the interface USB connect the source electrode of the metal-oxide-semiconductor Q3；The anode of the polar capacitor EC4 connects the transformer Node between 6 pins of T1 and 1 pin of interface USB, the cathode of the polar capacitor EC4 connect the source electrode of the metal-oxide-semiconductor Q3 Node between 4 pins of interface USB；The anode of the polar capacitor EC5 connects 6 pins and interface of the transformer T1 Node between 1 pin of USB, the cathode of the polar capacitor EC5 connect the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB Between node；Node between 6 pins of a termination transformer T1 and 1 pin of interface USB of the resistance R24, Node between the source electrode of another termination of resistance R24 metal-oxide-semiconductor Q3 and 4 pins of interface USB；The resistance R23 6 pins of a termination transformer T1 and 1 pin of interface USB between node, another termination institute of the resistance R23 State the node between the VIN pin of rectification chip U2 and capacitor C7；The cathode of the zener diode ZD2 meets the transformer T1 6 pins and interface USB 1 pin between node, the anode of the zener diode ZD2 meets the NPN type triode Q4 Collector；The anode of the diode D10 connects 6 pins of the transformer T1 and 1 drawing for interface USB by the capacitor C9 Node between foot, the cathode of the diode D10 connect the section between the resistance R9 and resistance R21 by the resistance R27 Point；The anode of the diode D8 is connect by the resistance R26 between 6 pins of the transformer T1 and 1 pin of interface USB Node；The cathode of the diode D8 connects the anode of the diode D9；The cathode of the diode D9 meets the metal-oxide-semiconductor Q3 Source electrode and interface USB 4 pins between node；The base stage of the NPN type triode Q4 connects the resistance R26 and diode Node between the anode of D8；The emitter of the NPN type triode Q4 connects the source of the metal-oxide-semiconductor Q3 by the resistance R25 Node between pole and 4 pins of interface USB；Node between the resistance R26 and the anode of diode D8 connects the capacitor Node between C9 and the anode of diode D10；Node between the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB connects Ground；The source electrode of the metal-oxide-semiconductor Q3 and the 4 pins ground connection of interface USB；When the interface USB interface does not access load, due to Transformer T1 and leadage circuit, which constitute complete circuit and can consume part electric energy, reduces the output voltage of the interface USB, subtracts Few stand-by power consumption, it is safer, it is more intelligent to adjust output voltage.

Above embodiment cannot limit the protection scope of the invention, and the personnel of professional skill field are not departing from In the case where the invention general idea, the impartial modification and variation done still fall within the range that the invention is covered Within.

Claims (9)

1. a kind of quick charger for automatically adjusting output voltage, including bridge rectifier filter circuit, the bridge rectifier filtering Circuit is connected with absorbing circuit, circuit of synchronous rectification in turn, and the absorbing circuit is connected with feedback power supply circuit, it is characterised in that The circuit of synchronous rectification is connected to leadage circuit, is connected with driving electricity between the absorbing circuit and feedback power supply circuit in turn Road, governor circuit are connected between the driving circuit and governor circuit and receive load information circuit.

2. the quick charger of automatic adjustment output voltage according to claim 1, it is characterised in that the bridge rectifier Filter circuit includes rectifier bridge BD1, fuse F1 and thermistor NTC1, inductance L1, resistance R1, polar capacitor EC1, polarity electricity Hold EC2, resistance L2A, inductance L2 and polar capacitor EC3；The ac input end 1 of the rectifier bridge BD1 passes sequentially through the temperature-sensitive Resistance NTC1, fuse F1 start to exchange fire line L；The ac input end 2 of the rectifier bridge BD1 meets zero curve N；The rectifier bridge BD1 is just Pole output end connects the input terminal of the absorbing circuit by the inductance L1；The cathode output end of the rectifier bridge BD1 passes through institute State inductance L2 ground connection；The anode of the polar capacitor EC1 connects the section between the cathode output end and inductance L1 of the rectifier bridge BD1 Point, the cathode of the polar capacitor EC1 connect the node between the cathode output end and inductance L2 of the rectifier bridge BD1；The pole The anode of property capacitor EC2 connects the node between the input terminal of the absorbing circuit and inductance L1, the cathode of the polar capacitor EC2 Connect the node between the inductance L2 and ground；The anode and inductance L1 of a termination polar capacitor EC1 of the resistance R1 it Between node, the node between another termination of resistance R1 inductance L1 and the anode of polar capacitor EC2；The resistance Node between the cathode and inductance L2 of a termination polar capacitor EC1 of L2A, described in another termination of the resistance L2A Node between inductance L2 and the cathode of polar capacitor EC2；The anode of the polar capacitor EC3 meets the inductance L1 and absorbs electricity Node between the input terminal on road, the cathode of the polar capacitor EC3 connect the node between the inductance L2 and ground.

3. the quick charger of automatic adjustment output voltage according to claim 2, it is characterised in that the absorbing circuit Including capacitor C1, capacitor C11, resistance R2, resistance R3, diode D5 and transformer T1；1 pin of the transformer T1 is grounded； 2 pins of the transformer T1 connect the input terminal of the feedback power supply circuit；3 pins of the transformer T1 meet the inductance L1 Node between the anode of polar capacitor EC2；4 pins of the transformer T1 divide two-way, connect the diode D5's all the way Anode, another way connect the driving circuit；5 pins of the transformer T1 connect the circuit of synchronous rectification；The transformer T1 6 pins connect the leadage circuit；Section between 3 pins and inductance L1 of a termination transformer T1 of the resistance R2 Point, the other end of the resistance R2 pass sequentially through the cathode that the resistance R3 meets the diode D5；One end of the capacitor C1 The node between 3 pins and inductance L1 of the transformer T1 is connect, the other end of the capacitor C1 meets institute by the capacitor C11 State the node between resistance R2 and resistance R3.

4. the quick charger of automatic adjustment output voltage according to claim 3, it is characterised in that the governor circuit Including main control chip U1, resistance R7, resistance R8, resistance R12, resistance R13, resistance R14, resistance R15, resistance R19, thermistor NTC2, capacitor C3, capacitor C4 and capacitor C5；1 pin of a termination main control chip U1 of the resistance R12, the other end point Two-way is grounded by the capacitor C5 all the way, and another way passes sequentially through the resistance R13, resistance R19 connects the feedback power supply electricity Road；Node between a termination resistance R12 and capacitor C5 of the resistance R14, described in another termination of the resistance R14 Node between capacitor C5 and ground；2 pins of the main control chip U1 pass sequentially through the resistance R15, thermistor NTC2 connects Node between the capacitor C5 and ground；5 pins of the main control chip U1 connect the output end for receiving load information circuit； 6 pins of the main control chip U1 connect the input terminal of the driving circuit；7 pins of the main control chip U1 are grounded；The master 8 pins of control chip U1 divide two-way, pass sequentially through all the way it is described meet the resistance R8, resistance R7 connects the inductance L1 and transformer Node between 3 pins of T1, another way connect the output end of the feedback power supply circuit；A termination master of the capacitor C4 Control the node between 8 pins of chip U1 and the output end of feedback power supply circuit, another termination master control of the capacitor C4 Node between 7 pins and ground of chip U1；8 pins of a termination capacitor C4 and main control chip U1 of the capacitor C3 it Between node, the node between 7 pins and ground of another termination of capacitor C3 main control chip U1.

5. the quick charger of automatic adjustment output voltage according to claim 4, it is characterised in that the feedback power supply Circuit includes diode D11, NPN type triode Q2, resistance R11, zener diode ZD1, capacitor C13, resistance R10, capacitor C12, resistance R28, diode D7 and resistance R29；The cathode of the diode D11 connects 8 pins and electricity of the main control chip U1 Hold the node between C4；The anode of the diode D11 connects the emitter of the NPN type triode Q2；The diode D7's Cathode connects the collector of the NPN type triode Q2 by the resistance R10；The anode of the diode D7 divides two-way, all the way Pass sequentially through the resistance R19, resistance R13 connects node between the capacitor C5 and resistance R12, another way passes through the resistance R27 connects 2 pins of the transformer T1；Between the termination resistance R19 and the anode of diode D7 of the resistance R28 Node, the other end of the resistance R28 by the capacitor C12 connect the resistance R10 and NPN type triode Q2 collector it Between node；The cathode of the zener diode ZD1 connects the base stage of the NPN type triode Q2, the zener diode ZD1's Anode connects the node between 1 pin and ground of the transformer T1；A termination NPN type triode Q2 of the resistance R11 Collector and resistance R10 between node, the base stage of another termination of resistance R11 NPN type triode Q2 and steady Press the node between the cathode of diode ZD1；The collector and electricity of a termination NPN type triode Q2 of the capacitor C13 Hinder the node between R10, the node between the anode and ground of another termination of capacitor C13 zener diode ZD1.

6. the quick charger of automatic adjustment output voltage according to claim 5, it is characterised in that the driving circuit Including metal-oxide-semiconductor Q1, capacitor C6, resistance R16, resistance R17, resistance R20 and diode D6；The drain electrode of the metal-oxide-semiconductor Q1 connects described Node between the anode of diode D5 and 4 pins of transformer T1；The grid of the metal-oxide-semiconductor Q1 is connect by the resistance R17 6 pins of the main control chip U1；The source electrode of the metal-oxide-semiconductor Q1 connects the input terminal for receiving load information circuit；Described two The anode of pole pipe D6 divides two-way, connects the node between the grid and resistance R17 of the metal-oxide-semiconductor Q1 all the way, and another way passes through described Resistance R20 connects the node between the input terminal for receiving load information circuit and the source electrode of the metal-oxide-semiconductor Q1；The diode The cathode of D6 connects the node between 6 pins and resistance R17 of the main control chip U1 by the resistance R16；The capacitor C3 The drain electrode of a termination metal-oxide-semiconductor Q1 and the anode of diode D5 between node, described in another termination of the capacitor C3 Node between the grid and resistance R17 of metal-oxide-semiconductor Q1.

7. the quick charger of automatic adjustment output voltage according to claim 6, it is characterised in that the reception load Information circuit includes resistance R4, resistance R5, resistance R6 and the resistance R18；A termination resistance R20 of the resistance R6 and Node between the source electrode of metal-oxide-semiconductor Q1, the other end ground connection of the resistance R6；A termination master control core of the resistance R18 5 pins of piece U1, the node between another termination of resistance R18 resistance R6 and the source electrode of metal-oxide-semiconductor Q1；The resistance Node between a termination resistance R18 and resistance R6 of R4, another termination of resistance R4 resistance R6 and ground Between node；Node between a termination resistance R18 and resistance R6 of the resistance R5, another termination of the resistance R5 Node between the resistance R4 and ground.

8. the quick charger of automatic adjustment output voltage according to claim 7, it is characterised in that the synchronous rectification Circuit includes rectification chip U2, resistance R9, resistance R21, resistance R27, resistance R22, metal-oxide-semiconductor Q3, capacitor C7, capacitor C8 and capacitor C10；The grid of the metal-oxide-semiconductor Q3 connects 3 pins of the rectification chip U2 by the resistance R22；The drain electrode of the metal-oxide-semiconductor Q3 Connect 5 pins of the transformer T1；The source electrode of the metal-oxide-semiconductor Q3 connects the output end of the leadage circuit；The one of the resistance R21 Terminate 1 pin of the rectification chip U2, the 5 of the drain electrode of another termination of resistance R21 metal-oxide-semiconductor Q3 and transformer T1 Node between pin；Two-way is divided in one end of the resistance R9, connects the leadage circuit by the resistance R27 all the way, another Road connects the node between the drain electrode of the metal-oxide-semiconductor Q3 and 5 pins of transformer T1, and the other end of the resistance R9 passes through the electricity Hold C10 and connects the node between the source electrode of the metal-oxide-semiconductor Q3 and the output end of leadage circuit；2 pins of the rectification chip U2 connect Node between the source electrode and capacitor C10 of the metal-oxide-semiconductor Q3；The GND pin of the rectification chip U2 connects the source of the metal-oxide-semiconductor Q3 Node between pole and the output end of leadage circuit；The VIN pin of the rectification chip U2 meets the MOS by the capacitor C7 Node between the source electrode of pipe Q3 and the GND pin of rectification chip U2；The VCC pin of the rectification chip U2 passes through the capacitor C8 connects the node between the source electrode of the metal-oxide-semiconductor Q3 and the GND pin of rectification chip U2.

9. the quick charger of automatic adjustment output voltage according to claim 8, it is characterised in that the leadage circuit Including polar capacitor EC4, polar capacitor EC5, resistance R24, resistance R23, capacitor C9, resistance R26, diode D10, diode D9, diode D8, zener diode ZD2, NPN type triode Q4, resistance R25 and interface USB；1 pin of the interface USB connects 6 pins of the transformer T1；The D+ pin of the interface USB connects the D- pin of the interface USB；Draw the 4 of the interface USB Foot connects the source electrode of the metal-oxide-semiconductor Q3；The anode of the polar capacitor EC4 connect the transformer T1 6 pins and interface USB 1 Node between pin, the cathode of the polar capacitor EC4 connect between the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB Node；The anode of the polar capacitor EC5 meets the node between 6 pins of the transformer T1 and 1 pin of interface USB, institute The cathode for stating polar capacitor EC5 connects node between the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB；The resistance R24 6 pins of a termination transformer T1 and 1 pin of interface USB between node, another termination institute of the resistance R24 State the node between the source electrode of metal-oxide-semiconductor Q3 and 4 pins of interface USB；The 6 of a termination transformer T1 of the resistance R23 Node between pin and 1 pin of interface USB, the VIN pin of another termination of resistance R23 rectification chip U2 and Node between capacitor C7；The cathode of the zener diode ZD2 connects 6 pins of the transformer T1 and 1 pin of interface USB Between node, the anode of the zener diode ZD2 connects the collector of the NPN type triode Q4；The diode D10's Anode connects the node between 6 pins of the transformer T1 and 1 pin of interface USB, the diode by the capacitor C9 The cathode of D10 connects the node between the resistance R9 and resistance R21 by the resistance R27；The anode of the diode D8 is logical It crosses the resistance R26 and connects node between 6 pins of the transformer T1 and 1 pin of interface USB；The diode D8's is negative Pole connects the anode of the diode D9；The cathode of the diode D9 connects the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB Between node；The base stage of the NPN type triode Q4 connects the node between the resistance R26 and the anode of diode D8；Institute The emitter for stating NPN type triode Q4 is connect by the resistance R25 between the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB Node；Node between the resistance R26 and the anode of diode D8 connects between the capacitor C9 and the anode of diode D10 Node；Node ground connection between the source electrode of the metal-oxide-semiconductor Q3 and 4 pins of interface USB.