CN208638084U

CN208638084U - A kind of connector with charge prompting function

Info

Publication number: CN208638084U
Application number: CN201821372534.7U
Authority: CN
Inventors: 张育才
Original assignee: Guangzhou Xun Di Dsy Technology Ltd
Current assignee: Guangzhou Xun Di Dsy Technology Ltd
Priority date: 2018-08-23
Filing date: 2018-08-23
Publication date: 2019-03-22
Anticipated expiration: 2028-08-23

Abstract

The utility model discloses a kind of connectors with charge prompting function, including power connector, charging circuit and charge cable, charge cable is equipped with USB interface, one end of power connector and the power output end of charging circuit connect, the other end of power connector is connect with USB interface, power connector built-in current circuit for detecting；Current-sensing circuit includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, first resistor, second resistance, first capacitor, the second capacitor, battery and driving circuit；Charging circuit includes first diode to the 5th diode, third capacitor, 3rd resistor to the 5th resistance, the 4th capacitor, the 5th capacitor, the first triode, the 6th capacitor, the 7th capacitor, the second triode, transformer, the 6th light emitting diode and power output end.The utility model has the function of that charge prompting, capable of protecting battery, so that it will not the charge lifetimes of battery are reduced because of recharge.

Description

A kind of connector with charge prompting function

Technical field

The utility model relates to field of connectors, in particular to a kind of connector with charge prompting function.

Background technique

The mobile devices such as mobile phone and portable product can carry battery currently on the market, on such end product Battery, at present commonly using 5V rechargeable battery.And such end product generally can all be filled by charging cable to it Electricity, general charging cable are all the cables of the interface needed for USB interface and terminal to realize that charging circuit is mobile to mobile phone etc. eventually The battery of end and portable product carries out continuing charging.And common cable persistently persistently charges to battery, due to not filling Electric prompt facility, may result in the accumulator super-charge of the mobile terminals such as mobile phone, also will affect its service life.

Utility model content

The technical problem to be solved by the present invention is to, in view of the above drawbacks of the prior art, provide it is a kind of have fill Electric prompt facility, can protect battery so that it will not reduced because of recharge the charge lifetimes of battery have charge prompting The connector of function.

The technical scheme adopted by the utility model to solve the technical problem is as follows: constructing a kind of with charge prompting function Connector, including power connector, charging circuit and charge cable, the charge cable are equipped with USB interface, and the power supply connects The one end for connecing device is connect with the power output end of the charging circuit, the other end of the power connector and the USB interface Connection, the power connector are built-in with current-sensing circuit；

The current-sensing circuit includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, first resistor, second resistance, first capacitor, the The grid of two capacitors, battery and driving circuit, the grid of first metal-oxide-semiconductor and the second metal-oxide-semiconductor with the driving circuit Connection, the drain electrode of first metal-oxide-semiconductor are connect with the charge cable, the source electrode ground connection of second metal-oxide-semiconductor, and described first The source electrode of metal-oxide-semiconductor is connect with the drain electrode of second metal-oxide-semiconductor, the anode of battery and one end of first resistor respectively, and described The other end of one resistance detects pin with the first of one end of the second resistance, one end of the second capacitor and driving circuit respectively Connection, the cathode of the battery respectively with the other end of the second resistance, the other end of the second capacitor and first capacitor One end connection, the other end ground connection of the first capacitor；

The charging circuit includes first diode, third capacitor, 3rd resistor, the second diode, third diode, Four capacitors, the 5th capacitor, the first triode, the 6th capacitor, the 7th capacitor, the 4th diode, the 4th resistance, the second triode, The anode of 5th resistance, transformer, the 5th diode, the 6th light emitting diode and power output end, the first diode connects Connect one end of 220V alternating current, the cathode of the first diode respectively with one end of the third capacitor, 3rd resistor one End, the 4th resistance one end connect with one end of the primary coil of transformer, described in the other end of the third capacitor connects The other end of 220V alternating current, the other end of the 3rd resistor respectively with the cathode of second diode, the 5th capacitor One end of one end, the collector of the first triode and the 7th capacitor connects, the other end and the described 2nd 3 of the 7th capacitor The base stage of pole pipe connects, the anode of second diode anode with one end of the 4th capacitor and third diode respectively Connection, the other end of the 4th capacitor are connect with the emitter of the other end of the third capacitor and the first triode respectively, The cathode of the third diode is connect with one end of the other end of the 5th capacitor and the feedback coil of transformer respectively；

The other end of 4th resistance respectively with the primary coil of the collector of second triode and transformer Other end connection, the base stage of first triode are connect with the cathode of the 4th diode, the sun of the 4th diode Pole is connect with one end of the emitter of second triode and the 5th resistance respectively, the other end of the 5th resistance respectively with The emitter of first triode is connected with the other end of the feedback coil of transformer, and the one of the secondary coil of the transformer End is connect with the anode of the 5th diode, the cathode of the 5th diode respectively with one end of the 6th capacitor, the The anode of six diodes, the anode of battery are connected with power output end, the other end difference of the primary coil of the transformer It is connect with the other end, the cathode of the 6th diode and the cathode of battery of the 6th capacitor, the 6th light emitting diode Model ZX-35288W42-1.

In the connector described in the utility model with charge prompting function, one end of the power connector is equipped with USB male joint, the USB male joint are connect with the power output end of the charging circuit, and the other end of the power connector is equipped with The drain electrode of USB female seat, first metal-oxide-semiconductor is connect by the USB female seat with the USB interface.

In the connector described in the utility model with charge prompting function, the charging circuit further includes the 7th electricity Hold, one end of the 7th capacitor connect with the collector of first triode, the other end of the 7th capacitor with it is described The base stage of second triode connects, and the capacitance of the 7th capacitor is 500pF.

In the connector described in the utility model with charge prompting function, the charging circuit further includes the seven or two The anode of pole pipe, the 7th diode is connect with one end of the 3rd resistor, the cathode of the 7th diode with it is described One end of 4th resistance connects, the model S-822T of the 7th diode.

In the connector described in the utility model with charge prompting function, the charging circuit further includes the 6th electricity Resistance, one end of the 6th resistance connect with one end of the feedback coil of the transformer, the other end of the 6th resistance and The other end of 5th capacitor connects, and the resistance value of the 6th resistance is 43k Ω.

In the connector described in the utility model with charge prompting function, first metal-oxide-semiconductor and the second metal-oxide-semiconductor It is N-channel MOS pipe, first triode and the second triode are NPN type triode.

The connector with charge prompting function for implementing the utility model has the advantages that due to being equipped with electricity Source connector, charging circuit and charge cable, power connector are built-in with current-sensing circuit, and current-sensing circuit includes first Metal-oxide-semiconductor, the second metal-oxide-semiconductor, first resistor, second resistance, first capacitor, the second capacitor, battery and driving circuit；Charging circuit Including first diode, third capacitor, 3rd resistor, the second diode, third diode, the 4th capacitor, the 5th capacitor, first Triode, the 6th capacitor, the 7th capacitor, the 4th diode, the 4th resistance, the second triode, the 5th resistance, transformer, the 5th Diode, the 6th light emitting diode and power output end, power connector have the function of prompt and detecting current, this is practical new Type can prompt just in charging, and after battery is fully charged, the utility model can be automatically stopped power supply, while have visual effect to mention Show and have been filled with electricity, will not continue to power to battery again after battery is completely filled with, so that playing protection battery will not be because Recharge and reduce battery charge lifetimes, can be under driving circuit under the action of the first metal-oxide-semiconductor and the second metal-oxide-semiconductor Up to instruction, the 6th lumination of light emitting diode is driven to play the role of display to make a response, meanwhile, the first metal-oxide-semiconductor, second Metal-oxide-semiconductor, the first triode and the cooperation of the second triode can be with the distribution of driving current, therefore have the function of charge prompting, can protect Protecting battery, so that it will not the charge lifetimes of battery are reduced because of recharge.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the utility model with the structural schematic diagram in connector one embodiment of charge prompting function；

Fig. 2 is the circuit diagram of current-sensing circuit in the embodiment；

Fig. 3 is the circuit diagram of charging circuit in the embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the connector embodiment that the utility model has charge prompting function, this has the connection of charge prompting function The structural schematic diagram of device is as shown in Figure 1.In Fig. 1, it includes power connector 1, charging that this, which has the connector of charge prompting function, Circuit 2 and charge cable 3 (i.e. charging power cord), wherein charge cable 3 is equipped with USB interface (not shown), and power supply connects The one end for connecing device 1 is connect with the power output end of charging circuit 2, the other end and the USB in charge cable 3 of power connector 1 Interface connection, power connector 1 are built-in with current-sensing circuit 11, current-sensing circuit 11, charging circuit 2 and charge cable 3 Constituting has charge prompting and the fully charged rear connector for stopping charging of battery.Current-sensing circuit 11 has display and detecting The effect of charging current, that is, have the function of charge prompting, and in charging process or being completely filled with the prompt after electricity The function of charging with stopping, in other words, the prompt that current-sensing circuit 11 can carry out the prompt of charging process and be full of, together When guarantee no longer lasting charging after charging complete.

Fig. 2 is the circuit diagram of current-sensing circuit in the present embodiment；In Fig. 2, which includes the One metal-oxide-semiconductor M1, the second metal-oxide-semiconductor M2, first resistor R1, second resistance R2, first capacitor C1, the second capacitor C2, battery BAT and Driving circuit U1, driving circuit U1 include driving chip, the grid of the grid of the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2 with drive Dynamic circuit U 1 connects, and the drain electrode of the first metal-oxide-semiconductor M1 is connect with charge cable 3, the source electrode ground connection of the second metal-oxide-semiconductor M2, the first metal-oxide-semiconductor The source electrode of M1 is connect with one end of the drain electrode of the second metal-oxide-semiconductor M2, the anode of battery BAT and first resistor R1 respectively, the first electricity The other end of R1 detects pin H1 with the first of one end of second resistance R2, one end of the second capacitor C2 and driving circuit U1 respectively Connection, the cathode of battery BAT respectively with the other end of second resistance R2, the other end of the second capacitor C2 and first capacitor C1 One end connection, the other end ground connection of first capacitor C1.

In the present embodiment, one end of power connector 1 is equipped with USB male joint 12, the power supply of USB male joint 12 and charging circuit 2 Output end connection, the other end of power connector 1 are equipped with USB female seat 13, the drain electrode of the first metal-oxide-semiconductor M1 by USB female seat 13 with USB interface connection.

In the present embodiment, first resistor R1 and second resistance R2 are thermistor, enable the voltage at the both ends battery BAT be U_B, the internal resistance R of battery BAT_B, the electric current for flowing through battery BAT is I_B, K=R2/ (R1+R2), 11 work of current-sensing circuit When making, driving circuit U1 passes through the voltage of the detecting both ends second resistance R2 H1, H2, to obtain the voltage at the both ends second resistance R2 Poor U_R2, then the electric current for flowing through battery BAT is I_B=U_R2/K*R_B.It is upper with temperature when the current-sensing circuit 11 works It rises, the internal resistance R of battery BAT_BIt will become larger, and in calculating process, the internal resistance R of battery BAT_BIt is a fixed value, causes The internal resistance R of battery BAT_BActual size be greater than the size in its calculating process so that flowing through of detecting of driving circuit U1 The electric current I of battery BAT_BGreater than the electric current for actually flowing through battery BAT.And it can be seen from formula in battery BAT Hinder R_BIn the case where becoming larger, the value for reducing K can then compensate the internal resistance R of battery BAT to a certain extent_BThe bring that becomes larger shadow It rings, so the second resistance R2 of negative temperature coefficient is placed near battery BAT, with the raising of battery BAT temperature, second The resistance value of resistance R2 will reduce, i.e., in the internal resistance R of battery BAT_BIn the case where becoming larger, the purpose for reducing the value of K is realized, To reduce the electric current I for flowing through battery BAT that driving circuit U1 is detected_BError.The current-sensing circuit 11 passes through subzero temperature The second resistance R2 of degree coefficient carrys out compensation temperature and increases the internal resistance R for leading to battery BAT_BBecome larger, to reduce driving circuit U1 detects the error for flowing through the current value of battery BAT.

Fig. 3 is the circuit diagram of charging circuit in the present embodiment, which includes first diode D1, third Capacitor C3,3rd resistor R3, the second diode D2 (the second diode D2 is zener diode), third diode D3, the 4th electricity Hold C4, the 5th capacitor C5, the first triode Q1, the 6th capacitor C6, the 7th capacitor C7, the 4th diode D4, the 4th resistance R4, the Two triode Q2, the 5th resistance R5, transformer T, the 5th diode D5, the 6th light emitting diode D6 and power output end Vo, In, one end of the anode of first diode D1 connection 220V alternating current, the cathode of first diode D1 respectively with third capacitor C3 One end, one end of 3rd resistor R3, one end of the 4th resistance R4 connected with one end of the primary coil of transformer T, third electricity Hold the other end of the other end connection 220V alternating current of C3, the other end of the 3rd resistor R3 yin with the second diode D2 respectively One end connection of pole, one end of the 5th capacitor C5, the collector of the first triode Q1 and the 7th capacitor C7, the 7th capacitor C7's is another One end is connect with the base stage of the second triode Q2, the anode of the second diode D2 one end and the three or two with the 4th capacitor C4 respectively The anode of pole pipe D3 connects, the other end of the 4th capacitor C4 hair with the other end of third capacitor C3 and the first triode Q1 respectively Emitter-base bandgap grading connection, the cathode of third diode D3 respectively with the other end of the 5th capacitor C5 and the feedback coil N2 of transformer T one End connection.

The other end of 4th resistance R4 is another with the primary coil of the collector of the second triode Q2 and transformer T respectively End connection, the base stage of the first triode Q1 connect with the cathode of the 4th diode D4, and the anode of the 4th diode D4 is respectively with the The connection of one end of the emitter of two triode Q2 and the 5th resistance R5, the other end of the 5th resistance R5 respectively with the first triode Q1 Emitter connected with the other end of the feedback coil N2 of transformer T, one end of the secondary coil N3 of transformer T and the five or two pole The anode of pipe D5 connects, the cathode of the 5th diode D5 respectively with one end of the 6th capacitor C6, the 6th diode D6 anode, store The anode of battery BAT is connected with power output end Vo, and the other end of the primary coil of transformer T is another with the 6th capacitor C6 respectively One end, the 6th diode D6 cathode connected with the cathode of battery BAT.In the present embodiment, the type of the 6th light emitting diode D6 Number be ZX-35288W42-1, certainly, in practical applications, the 6th light emitting diode D6 can also using other models have class Like the light emitting diode of function.

The DC voltage that 220V alternating current obtains about 300V after first diode D1 is rectified and third capacitor C3 is filtered adds On the primary coil N1 of transformer T, while this voltage leads it after 3rd resistor R3 adds biasing to the second triode Q2 It is logical, there is electric current to flow through the primary coil N1 of transformer T, while forming positive voltage on the feedback coil N2 of transformer T, this voltage warp 5th capacitor C5 feeds back to the second triode Q2, it is connected more, or even saturation, finally with the reduction of feedback current, the two or three Pole pipe Q2 exits rapidly saturation and ends, and so circulation forms oscillation, induces on the secondary coil N3 of transformer T required Output voltage.The feedback coil N2 of transformer T is simultaneously also together with third diode D3, the second diode D2, the 4th capacitor C4 Form voltage regulator circuit.When transformer T secondary coil N3 after the 5th diode D5 rectification voltage liter on the 6th capacitor C6 Gao Hou, while also showing as voltage of the feedback coil N2 of transformer T after third diode D4 rectification on the 4th capacitor C4 It is lower, when be down to about the second diode D2 pressure stabilizing value when, the second diode D2 conducting, make the second triode Q2 by base stage to Ground, turns off the second triode Q2, and output voltage reduces.

The 5th resistance R5, the 4th diode D4 and the first triode Q1V form current foldback circuit in charging circuit 2.When The operating current of second triode Q2 greatly too when, the voltage generated on the 5th resistance R5 adds to the one or three pole through the 4th diode D4 The base stage of pipe Q1, the first triode Q1 conducting, the base voltage decline of the second triode Q2 subtract the electric current of the second triode Q2 It is small.To change output voltage, as long as replacing the second diode D2 of different pressure stabilizing values, pressure stabilizing is worth smaller, output voltage It is lower, it is on the contrary then higher.

In the present embodiment, under the action of the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2, finger can be assigned to driving circuit U1 It enabling, the 6th light emitting diode D6 of driving shines, to make a response, play the role of display, meanwhile, the first metal-oxide-semiconductor M1, second Metal-oxide-semiconductor M2, the first triode Q1 and the second triode Q2 cooperation can be with the distribution of driving current, therefore have charge prompting function Energy, capable of protecting battery, so that it will not the charge lifetimes of battery BAT are reduced because of recharge.

The connector with charge prompting function has timing to stop charging, display charging and the function full of rear turn-off current Energy.When the utility model charges to the battery in the terminals such as mobile phone to charging circuit for current charging cable, as long as will charging Cable is connected to this connector with charge prompting function and can be carried out charging, and common cable constantly charges, meeting The deficiency of its service life is influenced, there is the connector of charge prompting function can do according to the difference of detecting current charging situation for this Corresponding display and power down function out.

In the present embodiment, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2 are N-channel MOS pipe, the first triode Q1 and second Triode Q2 is NPN type triode.Certainly, in practical applications, the first metal-oxide-semiconductor M1 and the second metal-oxide-semiconductor M2 can also be P Channel MOS tube, the first triode Q1 and the second triode Q2 can also be PNP type triode, but the at this moment structure of circuit It accordingly to change.

In the present embodiment, which further includes the 7th capacitor C7, one end of the 7th capacitor C7 and the first triode Q1 Collector connection, the other end of the 7th capacitor C7 connect with the base stage of the second triode Q2.7th capacitor C7 is coupled capacitor, For preventing the interference between the first triode Q1 and the second triode Q2, to further enhance the safety of circuit and reliable Property.It is noted that the capacitance of the 7th capacitor C7 is 500pF in the present embodiment, certainly, in practical applications, the 7th electricity The capacitance for holding C7 can adjust accordingly as the case may be, that is, the capacitance of the 7th capacitor C7 can be according to specific Situation is increased accordingly or is reduced.

In the present embodiment, which further includes the 7th diode D7, the anode and 3rd resistor of the 7th diode D7 One end of R3 connects, and the cathode of the 7th diode D7 is connect with one end of the 4th resistance R4.7th diode D7 is two pole of current limliting Pipe, for carrying out current-limiting protection, further to enhance the safety and reliability of circuit.It is noted that the present embodiment In, the model S-822T of the 7th diode D7, certainly, in practical applications, the 7th diode D7 can also use its alloytype Number with similar functions diode.

In the present embodiment, which further includes the 6th resistance R6, and one end of the 6th resistance R6 is anti-with transformer T's One end of feeder line circle N2 connects, and the other end of the 6th resistance R6 is connect with the other end of the 5th capacitor C5.6th resistance R6 is limited Leakage resistance, for carrying out current-limiting protection, to further enhance current limitation effect.It is noted that in the present embodiment, the 6th resistance The resistance value of R6 is 43k Ω, and certainly, in practical applications, the resistance value of the 6th resistance R6 can be adjusted accordingly as the case may be It is whole, that is, the resistance value of the 6th resistance R6 can be increased accordingly or be reduced as the case may be.

In short, the utility model has the function of stopping charging, the power connector 1 after visual and detecting current is fully charged It is connect by the USB male joint 12 of one end with the power output end Vo of charging circuit 2, the other end provides USB female seat 13, and the USB is female Seat 13 connect with charge cable 3, is charged to battery BAT, is prompted and detecting current function having built in power connector 1 Current-sensing circuit 11, there is the connector of charge prompting function can prompt just in charging for this；When battery BAT is fully charged Afterwards, there is the connector of charge prompting function can be automatically stopped power supply for this, while have been filled with electricity by visual effect prompt, work as storage Battery BAT will not continue to power to battery BAT again after being completely filled with, to play the role of protecting battery BAT, make it not The charge lifetimes of battery BAT can be reduced because of recharge.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims

1. a kind of connector with charge prompting function, which is characterized in that including power connector, charging circuit and charging cable Cable, the charge cable are equipped with USB interface, the power output end company of one end of the power connector and the charging circuit It connects, the other end of the power connector is connect with the USB interface, and the power connector is built-in with current-sensing circuit；

The current-sensing circuit includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, first resistor, second resistance, first capacitor, the second electricity Appearance, battery and driving circuit, the grid of first metal-oxide-semiconductor and the grid of the second metal-oxide-semiconductor are connect with the driving circuit, The drain electrode of first metal-oxide-semiconductor is connect with the charge cable, the source electrode ground connection of second metal-oxide-semiconductor, first metal-oxide-semiconductor Source electrode is connect with the drain electrode of second metal-oxide-semiconductor, the anode of battery and one end of first resistor respectively, the first resistor The other end is connect with the first detecting pin of one end of the second resistance, one end of the second capacitor and driving circuit respectively, institute The cathode for stating battery connects with one end of the other end of the second resistance, the other end of the second capacitor and first capacitor respectively It connects, the other end ground connection of the first capacitor；

The charging circuit includes first diode, third capacitor, 3rd resistor, the second diode, third diode, the 4th electricity Appearance, the 5th capacitor, the first triode, the 6th capacitor, the 7th capacitor, the 4th diode, the 4th resistance, the second triode, the 5th Resistance, transformer, the 5th diode, the 6th light emitting diode and power output end, the anode connection of the first diode One end of 220V alternating current, the cathode of the first diode respectively with one end of the third capacitor, 3rd resistor one end, One end of 4th resistance is connected with one end of the primary coil of transformer, and the other end of the third capacitor connects the 220V and hands over The other end of galvanic electricity, the other end of the 3rd resistor respectively with the cathode of second diode, one end of the 5th capacitor, The connection of one end of the collector of one triode and the 7th capacitor, the other end of the 7th capacitor and the base of second triode Pole connection, the anode of second diode are connect with the anode of one end of the 4th capacitor and third diode respectively, institute The other end for stating the 4th capacitor is connect with the emitter of the other end of the third capacitor and the first triode respectively, the third The cathode of diode is connect with one end of the other end of the 5th capacitor and the feedback coil of transformer respectively；

The other end of 4th resistance is another with the primary coil of the collector of second triode and transformer respectively End connection, the base stage of first triode are connect with the cathode of the 4th diode, the anode point of the 4th diode Do not connect with one end of the emitter of second triode and the 5th resistance, the other end of the 5th resistance respectively with it is described The other end of the feedback coil of the emitter and transformer of first triode connects, one end of the secondary coil of the transformer with The anode of 5th diode connects, the cathode of the 5th diode respectively with one end of the 6th capacitor, the six or two The anode of pole pipe, the anode of battery are connected with power output end, the other end of the primary coil of the transformer respectively with institute The cathode of the other end, the 6th diode of stating the 6th capacitor is connected with the cathode of battery, the type of the 6th light emitting diode Number be ZX-35288W42-1.

2. the connector according to claim 1 with charge prompting function, which is characterized in that the power connector One end is equipped with USB male joint, and the USB male joint connect with the power output end of the charging circuit, the power connector it is another One end is equipped with USB female seat, and the drain electrode of first metal-oxide-semiconductor is connect by the USB female seat with the USB interface.

3. the connector according to claim 2 with charge prompting function, which is characterized in that the charging circuit also wraps Include the 7th capacitor, one end of the 7th capacitor is connect with the collector of first triode, the 7th capacitor it is another End is connect with the base stage of second triode, and the capacitance of the 7th capacitor is 500pF.

4. the connector according to claim 3 with charge prompting function, which is characterized in that the charging circuit also wraps The 7th diode is included, the anode of the 7th diode is connect with one end of the 3rd resistor, the yin of the 7th diode Pole is connect with one end of the 4th resistance, the model S-822T of the 7th diode.

5. the connector according to claim 4 with charge prompting function, which is characterized in that the charging circuit also wraps The 6th resistance is included, one end of the 6th resistance is connect with one end of the feedback coil of the transformer, the 6th resistance The other end is connect with the other end of the 5th capacitor, and the resistance value of the 6th resistance is 43k Ω.

6. according to claim 1 to the connector described in 5 any one with charge prompting function, which is characterized in that described First metal-oxide-semiconductor and the second metal-oxide-semiconductor are N-channel MOS pipe, and first triode and the second triode are NPN type triode.