CN206250824U - A kind of quick charger charged for mobile phone - Google Patents

Abstract

The utility model is related to the technical field of charging circuit, more particularly to a kind of quick charger charged for mobile phone, including the input protection circuit being sequentially connected from input to output end, EMI rectification circuits, current rectifying and wave filtering circuit, high pressure peak absorbing circuit, transformer T1, secondary current rectifying and wave filtering circuit, protocol recognition circuit, output rectification circuit and USB interface, protocol recognition circuit uses the protocol identification chip U2 of model IW636, protocol identification chip U2 is connected by USB interface DATA+ and DATA with mobile phone, and the different corresponding signals of signals transmission to pwm control circuit are exported according to mobile phone, pwm control circuit exports corresponding charging voltage accordingly, so the mobile phone is obtained with the maximum charging voltage that it is allowed, so as to improve charge efficiency.

Description

A kind of quick charger charged for mobile phone

Technical field

The utility model is related to the technical field of charging circuit, more particularly to a kind of quick charge charged for mobile phone Device.

Background technology

With the high speed development of electronic information technology, the electronic equipment and system with large scale integrated circuit as core are extensive It is present in the every field of the modern life, smart mobile phone is upgraded to eight cores by monokaryon, double-core, occurring ten cores till now will not also shy It is surprised, but unique regrettably battery of mobile phone aspect technological innovation is still slow, and battery durable ability is insufficient for user and uses, Although in the battery of the hoist capacity doing one's best, this after all space it is limited, and the charge efficiency of charger is low, causes electricity The charging interval in pond is long, it is impossible to meet the requirement of people.

The content of the invention

The purpose of this utility model is to provide a kind of charge efficiency quick charger charged for mobile phone high.

The utility model provides a kind of quick charger charged for mobile phone, including connects successively from input to output end It is the input protection circuit that connects, EMI rectification circuits, current rectifying and wave filtering circuit, high pressure peak absorbing circuit, transformer T1, secondary Current rectifying and wave filtering circuit, protocol recognition circuit, output rectification circuit and USB interface, the quick charger also include that primary side feedback is defeated Go out mu balanced circuit, it includes pwm control circuit and mu balanced circuit, the auxiliary of the input connection transformer T1 of the mu balanced circuit Winding, the output end of the mu balanced circuit connects the pwm control circuit, and the pwm control circuit includes model IW1782 Pwm chip U1, FET Q1, FET Q3, current foldback circuit and thermal-shutdown circuit, FET Q1's The armature winding of drain electrode connection transformer T1,6 pins of the grid connection pwm chip U1 of FET Q1, FET The source electrode of Q1 connects 5 pins of the current foldback circuit and pwm chip U1, the thermal-shutdown circuit connection PWM controls 2 pins of coremaking piece U1, a drain electrode cathode output end for current rectifying and wave filtering circuit of connection of FET Q3, FET Q3's Source electrode connects the output end of the mu balanced circuit, 4 pins of the grid connection pwm chip U1 of FET Q3；The association View identification circuit includes the protocol identification chip U2 of model IW636, the 4 pins connection USB interface of protocol identification chip U2 6 pins of DATA-, protocol identification chip U2 connect the DATA+ of USB interface, 2 pins of protocol identification chip U2 through optocoupler hair Light device U4A connects the output end of the output filter circuit, the colelctor electrode connection pwm chip U1 of the light-receiving device U4B of optocoupler 3 pins.

Wherein, the thermal-shutdown circuit includes the resistance R31 and thermistor NTC2 that are in series.

Wherein, the current foldback circuit includes resistance R18, R19 and R20, and resistance R18, R19 and R20 are connected in parallel Between 5 pins and ground of pwm chip U1.

Wherein, the secondary current rectifying and wave filtering circuit includes output filter circuit and circuit of synchronous rectification, the output filtering Circuit includes electric capacity C11, C12 and resistance R21, and electric capacity C11, C12 and resistance R21 are both connected to the secondary windings of transformer T1 Between one end and ground, the circuit of synchronous rectification includes synchronous rectification chip U3, the FET Q5 of model IW673 and field effect Should pipe Q6, the other end of the secondary windings of the drain electrode connection transformer T1 of FET Q5, the source ground of FET Q5, field 3 pins of the grid connection synchronous rectification chip U3 of effect pipe Q5, the drain electrode of the drain electrode connection FET Q5 of FET Q6, 5 pins of the source electrode connection synchronous rectification chip U3 of FET Q6, the grid connection synchronous rectification chip U3 of FET Q6 1 pin.

Beneficial effect：A kind of quick charger charged for mobile phone of the utility model, protocol recognition circuit uses model It is the protocol identification chip U2 of IW636, protocol identification chip U2 is connected by USB interface DATA+ and DATA- with mobile phone, and root Different signals being exported according to mobile phone and sending corresponding signal to pwm control circuit, pwm control circuit exports corresponding charging accordingly Voltage, so the mobile phone is obtained with the maximum charging voltage that it is allowed, so as to improve charge efficiency.

Brief description of the drawings

Using accompanying drawing, the utility model is described in further detail, but embodiment in accompanying drawing is not constituted to of the present utility model Any limitation, for one of ordinary skill in the art, on the premise of not paying creative work, can also be according to following attached Figure obtains other accompanying drawings.

Fig. 1 is a kind of circuit theory diagrams of the quick charger charged for mobile phone of the utility model.

Fig. 2 is input protection circuit, the EMI rectified currents in a kind of quick charger charged for mobile phone of the utility model Road, secondary current rectifying and wave filtering circuit, the circuit theory diagrams of high pressure peak absorbing circuit.

Fig. 3 is secondary current rectifying and wave filtering circuit, the agreement in a kind of quick charger charged for mobile phone of the utility model The circuit theory diagrams of identification circuit, output rectification circuit.

Fig. 4 is the primary side feedback output voltage stabilizing circuit in a kind of quick charger charged for mobile phone of the utility model Circuit theory diagrams.

Fig. 1 includes：1 --- input protection circuit, 2 --- EMI rectification circuits, 3 --- current rectifying and wave filtering circuit, 4 --- --- secondary current rectifying and wave filtering circuit, 51 --- output filter circuit, 52 --- synchronous rectifications of high pressure peak absorbing circuit, 5 --- --- output rectification circuit, 8 --- the primary side feedback output voltage stabilizing circuit, 81 --- PWM of protocol recognition circuit, 7 of circuit, 6 Control circuit, 811 --- current foldback circuit, 812 --- thermal-shutdown circuit, 82 --- mu balanced circuits.

Specific embodiment

The utility model is further described with the following Examples.

A kind of circuit theory diagrams of the quick charger charged for mobile phone of the utility model are as shown in figure 1, including from defeated Enter input protection circuit 1,2, current rectifying and wave filtering circuit 3 of EMI rectification circuits, the suction of high pressure spike that end is sequentially connected to output end Circuit 4, transformer T1, secondary current rectifying and wave filtering circuit 5, protocol recognition circuit 6, output rectification circuit 7 and USB interface are received, this is fast Fast charger also includes primary side feedback output voltage stabilizing circuit 8, and it includes pwm control circuit 81 and mu balanced circuit 82, mu balanced circuit The assists winding of 82 input connection transformer T1, the output end connection pwm control circuit 81 of mu balanced circuit 82；PWM is controlled Circuit 81 includes pwm chip U1, FET Q1, FET Q3, the and of current foldback circuit 811 of model IW1782 Thermal-shutdown circuit 812, the armature winding of the drain electrode connection transformer T1 of FET Q1, the grid connection of FET Q1 6 pins of pwm chip U1, the source electrode connection current foldback circuit 811 of FET Q1 and the 5 of pwm chip U1 are drawn Pin, 2 pins of the connection pwm chip of thermal-shutdown circuit 812 U1, the drain electrode of FET Q3 connects a rectifying and wave-filtering electricity The cathode output end on road 3, the source electrode of FET Q3 connects the output end of mu balanced circuit 82, the grid connection of FET Q3 4 pins of pwm chip U1.

Protocol recognition circuit 6 includes the protocol identification chip U2 of model IW636, and 4 pins of protocol identification chip U2 connect The DATA- of USB interface is met, 6 pins of protocol identification chip U2 connect the DATA+ of USB interface, and the 2 of protocol identification chip U2 draws Pin connects the output end of output filter circuit 51, the colelctor electrode connection PWM of the light-receiving device U4B of optocoupler through the photophore U4A of optocoupler 3 pins of control chip U1.Protocol identification chip U2 is connected by USB interface DATA+ and DATA- with mobile phone, defeated according to mobile phone Go out different signals, V+ exports different voltage 5V/9V/12V, export how many V voltages and received by mobile phone DATA+ and DATA- The signal deciding for arriving, when mobile phone without function is filled soon, quick charger acquiescence 5V outputs thus will not be to mobile phone because height fills Piezoelectric voltage and to mobile phone damage.

The fuse F1 of the input L ends series connection 2A of input protection circuit 1, when there is short circuit in quick charger, fuse F1 can fuse so as to cut off input voltage in time, prevent charging circuit from severe compromise occur；In addition, fuse F1 concatenations one Individual thermistor NTC1, can reduce surge impact to protect the electronic component of circuit below.

Inductance LF1 in EMI rectification circuits filters electromagnetic interference, and prevents external electromagnetic element and equipment to the electricity that charges The interference on road, and prevent the interference of power supply equipment to external world.AC signal is rectified into rectifier bridge BD1 the direct current letter of pulsation Number, then the AC signal of residual and right is further filtered out by the π types filtering of electric capacity C1, electric capacity C2, inductance L1, inductance L2 groups Differential mode EMI signal is decayed, and then supplies next stage circuit.Transformer T1 circuits receive the energy of prime supply, field-effect Pipe Q1 is controlled by pwm chip U1, pwm chip U1 work when, FET Q1 be in a conducting for high speed and Cut-off state, so that transformer T1 follows it to be operated in an energy storage and the state for releasing energy all the time.

Specifically, thermal-shutdown circuit 812 includes the resistance R31 and thermistor NTC2 that are in series, pwm chip U1 Thermistor NTC2 and resistance R31 terminal voltages are detected by 2 pins, thermistor NTC2 can generate heat when excess temperature, and 2 pins are just Over-temperature protection can be played.

Specifically, current foldback circuit 811 includes resistance R18, R19 and R20, and resistance R18, R19 and R20 are connected in parallel Between 5 pins and ground of pwm chip U1, pwm chip U1 is by 5 pin detection resistances R18, R19 and R20 ends electricity Pressure, when excessively stream, 5 pins can play overcurrent protection.

Specifically, secondary current rectifying and wave filtering circuit 5 includes output filter circuit 51 and circuit of synchronous rectification 52, exports filtered electrical Road 51 includes electric capacity C11, C12 and resistance R21, and electric capacity C11, C12 and resistance R21 are both connected to the secondary windings of transformer T1 Between one end and ground, circuit of synchronous rectification 52 includes synchronous rectification chip U3, FET Q5 and the field-effect of model IW673 The other end of the secondary windings of the drain electrode connection transformer T1 of pipe Q6, FET Q5, the source ground of FET Q5, field effect Should pipe Q5 grid connection synchronous rectification chip U3 3 pins, the drain electrode of the drain electrode connection FET Q5 of FET Q6, field 5 pins of the source electrode connection synchronous rectification chip U3 of effect pipe Q6, the 1 of the grid connection synchronous rectification chip U3 of FET Q6 Pin, FET Q5 is synchronous FET, and synchronous rectification chip U3 one synchronizing signal of generation makes FET with output Alternating current synchronous rectification, then provide output voltage through electric capacity C11 and electric capacity C12 filtering.

Claims (4)

1. it is a kind of for mobile phone charge quick charger, it is characterised in that including what is be sequentially connected from input to output end Input protection circuit, EMI rectification circuits, current rectifying and wave filtering circuit, high pressure peak absorbing circuit, transformer T1, a secondary rectification Filter circuit, protocol recognition circuit, output rectification circuit and USB interface, the quick charger also include that primary side feedback output is steady Volt circuit, it includes pwm control circuit and mu balanced circuit, the auxiliary of the input connection transformer T1 of the mu balanced circuit around Group, the output end of the mu balanced circuit connects the pwm control circuit, and the pwm control circuit includes model IW1782's Pwm chip U1, FET Q1, FET Q3, current foldback circuit and thermal-shutdown circuit, the leakage of FET Q1 Pole connects the armature winding of transformer T1,6 pins of the grid connection pwm chip U1 of FET Q1, FET Q1 Source electrode connect 5 pins of the current foldback circuit and pwm chip U1, the thermal-shutdown circuit connection PWM controls 2 pins of chip U1, a drain electrode cathode output end for current rectifying and wave filtering circuit of connection of FET Q3, the source of FET Q3 Pole connects the output end of the mu balanced circuit, 4 pins of the grid connection pwm chip U1 of FET Q3；The agreement Identification circuit includes the protocol identification chip U2 of model IW636, the 4 pins connection USB interface of protocol identification chip U2 6 pins of DATA-, protocol identification chip U2 connect the DATA+ of USB interface, 2 pins of protocol identification chip U2 through optocoupler hair Light device U4A connects the output end of the output filter circuit, the colelctor electrode connection pwm chip U1 of the light-receiving device U4B of optocoupler 3 pins.

2. it is according to claim 1 it is a kind of for mobile phone charge quick charger, it is characterised in that the overheat protector Circuit includes the resistance R31 and thermistor NTC2 that are in series.

3. it is according to claim 1 it is a kind of for mobile phone charge quick charger, it is characterised in that the overcurrent protection Circuit includes resistance R18, R19 and R20, and resistance R18, R19 and R20 are connected in 5 pins and ground of pwm chip U1 in parallel Between.

4. it is according to claim 1 it is a kind of for mobile phone charge quick charger, it is characterised in that the secondary rectification Filter circuit includes output filter circuit and circuit of synchronous rectification, and the output filter circuit includes electric capacity C11, C12 and resistance R21, electric capacity C11, C12 and resistance R21 are both connected between one end of the secondary windings of transformer T1 and ground, the synchronous rectification Circuit includes that the drain electrode of synchronous rectification chip U3, the FET Q5 and FET Q6, FET Q5 of model IW673 connects The other end of the secondary windings of transformer T1 is connect, the source ground of FET Q5, the grid connection of FET Q5 is synchronous whole 3 pins of stream chip U3, the drain electrode of the drain electrode connection FET Q5 of FET Q6, the source electrode connection of FET Q6 is synchronous 5 pins of rectification chip U3,1 pin of the grid connection synchronous rectification chip U3 of FET Q6.