CN214590734U - Desktop type multi-port USB charger circuit - Google Patents
Desktop type multi-port USB charger circuit Download PDFInfo
- Publication number
- CN214590734U CN214590734U CN202120240871.6U CN202120240871U CN214590734U CN 214590734 U CN214590734 U CN 214590734U CN 202120240871 U CN202120240871 U CN 202120240871U CN 214590734 U CN214590734 U CN 214590734U
- Authority
- CN
- China
- Prior art keywords
- resistor
- capacitor
- circuit
- electrically connected
- forty
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model provides a many mouthfuls of USB charger circuits of desktop type. The circuit comprises a voltage input circuit, a transformer, a master control IC circuit, a synchronous rectification IC circuit, an operation comparison circuit and a current-limiting IC output circuit; the voltage input circuit is electrically connected with a first input end of the transformer, and the master control IC circuit is electrically connected with a second input end of the transformer; the output end of the transformer is electrically connected with the synchronous rectification IC circuit; the feedback input end of the main control IC circuit is electrically connected with the feedback output end of the operation comparison circuit; the synchronous rectification IC circuit and the operation comparison circuit are electrically connected with the input end of the current-limiting IC circuit. The utility model can realize the requirement of charging a plurality of electric devices simultaneously; the intelligent self-adaptive current, the intelligent voltage drop compensation and the intelligent single-port current limiting are integrated.
Description
Technical Field
The utility model relates to a technical field that charges, in particular to many mouthfuls of USB charger circuits of desktop type.
Background
At present, a multi-port charger can charge multiple devices simultaneously, and has a function of connecting multiple devices simultaneously for one charging connector and one charging interface, and the output interface form of the currently sold charger has the following defects: mostly single-port and double-port output; output interface is few partially, is difficult to satisfy a plurality of consumer and charges simultaneously, and is bulky, occupies power supply line board socket space.
SUMMERY OF THE UTILITY MODEL
The utility model provides a desktop type multi-port USB charger circuit, which is used for solving the problem that most chargers in the prior art are mainly single-port and double-port output; output interface is few partially, is difficult to satisfy a plurality of consumer and charges simultaneously, and is bulky, occupies the condition in power supply line board socket space.
A desktop multi-port USB charger circuit, comprising:
the circuit comprises a voltage input circuit, a transformer, a master control IC circuit, a synchronous rectification IC circuit, an operation comparison circuit and a current-limiting IC output circuit; wherein the content of the first and second substances,
the voltage input circuit is electrically connected with a first input end of the transformer, and the master control IC circuit is electrically connected with a second input end of the transformer;
the output end of the transformer is electrically connected with the synchronous rectification IC circuit;
the feedback input end of the main control IC circuit is electrically connected with the feedback output end of the operation comparison circuit;
the synchronous rectification IC circuit and the operation comparison circuit are electrically connected with the input end of the current-limiting IC circuit.
As an embodiment of the present invention: the number of the current-limiting IC output circuits is 6, and the 6 current-limiting IC output circuits are all connected with the current output ends of the synchronous rectification IC circuit and the operation comparison circuit.
As an embodiment of the present invention: the voltage input circuit includes: the circuit comprises an AC input port, a fuse, a first common-mode inductor, a first anti-interference capacitor, a first resistance bridge, a second common-mode inductor, a first rectifier, a first electrolytic capacitor, a first capacitor, a second resistance bridge, a second capacitor, a ninth resistor, a tenth resistor and a third capacitor; wherein the content of the first and second substances,
the input end of the AC input port is used for being externally connected with an alternating current power supply;
the live wire output end of the AC input port is used for being connected with one end of the fuse, and the other end of the fuse and the zero line end of the AC input port are connected with the input end of the first common mode inductor;
the output end of the first common mode circuit is connected with the first electrolytic capacitor and the first bridge in parallel; wherein the content of the first and second substances,
the first bridge consists of a first resistor, a second resistor, a fourth resistor and a third resistor, the first resistor is connected with the third resistor in series, the second resistor is connected with the fourth resistor in series, and the second resistor and the fourth resistor which are connected in series are connected with the second common-mode inductor in parallel;
the output end of the second common mode inductor is connected with the first rectifier;
the output end of the first rectifier is connected with the first electrolytic capacitor, the first capacitor and the second resistance bridge in parallel; wherein the content of the first and second substances,
the second bridge consists of a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor, the fifth resistor and the seventh resistor are connected in series, the sixth resistor and the eighth resistor are connected in series, one end of the sixth resistor, which is connected with the first rectifier, is also connected with the anode of a second capacitor, and the anode of the second capacitor is connected with a ninth resistor and a tenth resistor which are connected in parallel;
the ninth resistor and the tenth resistor are also connected with the cathode of a first diode, and the cathode of the first diode is also electrically connected with the seventh resistor and the eighth resistor;
the positive input end of the first rectifier is also connected with a third capacitor and a first input end of a transformer;
and the anode of the first diode, the second input end of the transformer and the master control IC circuit.
As an embodiment of the present invention: the main control IC circuit comprises a first PWM controller, an eleventh resistor, a fourth capacitor, a twelfth resistor, a thirteenth resistor, a fifth capacitor, a sixth capacitor, a fourteenth resistor, a fifteenth resistor, a second electrolytic resistor, a seventh capacitor, an eighth capacitor, a sixteenth resistor, a second diode, a seventeenth resistor, an eighteenth resistor, a third diode, a nineteenth resistor, a first MOS (metal oxide semiconductor) tube, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor and a twenty-fifth resistor; wherein the content of the first and second substances,
a voltage feedback end of the first PWM controller, the fourth capacitor and the eleventh resistor;
the signal access end of the first PWM controller is connected with the grid electrode of the first MOS tube through an eighteenth resistor and a third diode which are connected in parallel, and the grid electrode of the first MOS tube is grounded through a nineteenth resistor; the drain electrode of the first MOS tube is electrically connected with the anode of the first diode;
the power supply end of the first PWM controller is electrically connected with the voltage input circuit and the first input end of the transformer through a thirteenth resistor and a twelfth resistor which are connected in series;
the power supply end of the first PWM controller is grounded through a fifth capacitor and a sixth capacitor;
the power supply end of the first PWM controller is electrically connected with the second electrolytic resistor through the fourteenth resistor;
the fourteenth resistor is connected in series with a fifteenth resistor, and the fifteenth resistor is electrically connected with the third input end of the transformer through an eighth capacitor and a sixteenth resistor which are connected in series; the fifteenth resistor is further connected with the cathode of the second diode, the anode of the second diode is electrically connected with the synchronous rectification IC circuit through a seventeenth resistor, and the anode of the second diode is further electrically connected with the third input end of the transformer;
a signal output pin of the first PWM controller is electrically connected with one end of the seventh capacitor and one end of the twentieth resistor; the other end of the seventh capacitor is electrically connected with one end of the twenty-first resistor, the twenty-second resistor, the twenty-third resistor, the twenty-fourth resistor and the twenty-fifth resistor respectively, and the other end of the twenty-first resistor, the twenty-second resistor, the twenty-third resistor, the twenty-fourth resistor and the twenty-fifth resistor is electrically connected with the other end of the seventh capacitor; and one end of the twenty-fifth resistor, which is connected with the twentieth resistor, is also connected with the source electrode of the first MOS transistor.
As an embodiment of the present invention: the synchronous rectification IC circuit comprises a second PWM controller, a twenty-sixth resistor, a twenty-seventh resistor, a second mos tube, a twenty-eighth resistor, a twenty-ninth resistor, a ninth capacitor, a tenth capacitor, a third electrolytic capacitor, a fourth electrolytic capacitor, a fifth electrolytic capacitor, a first LED diode, a thirtieth resistor and a thirty-first resistor; wherein the content of the first and second substances,
the first output end of the transformer is electrically connected with a power input pin of the second PWM controller, the anode of the third electrolytic capacitor, the anode of the fourth electrolytic capacitor, the anode of the fifth electrolytic capacitor and the anode of the first LED diode;
a second output end of the transformer is electrically connected with a negative electrode of the third electrolytic capacitor, a negative electrode of the fourth electrolytic capacitor, a negative electrode of the fifth electrolytic capacitor, a negative electrode of the thirtieth resistor and a positive electrode of the thirty-first resistor through a twenty-ninth resistor and a tenth capacitor which are connected in series; wherein the content of the first and second substances,
the tenth capacitor is connected with the power supply input end of the second PWM controller through a ninth capacitor;
the grounding end of the second PWM controller is electrically connected with the source electrode of the second mos tube;
a signal input end of the second PWM controller is electrically connected with a grid electrode of the second mos tube through a twenty-eighth resistor;
and the drain electrode of the second mos tube is electrically connected with the second input end of the transformer.
As an embodiment of the present invention: the operation comparison circuit includes: the circuit comprises a comparator, a thirty-second resistor, an eleventh capacitor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a thirty-eighth resistor, a thirty-ninth resistor, a forty-fourth resistor, a forty-first resistor, a forty-second resistor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a third mos tube and a fourth diode; wherein the content of the first and second substances,
the first reverse input end of the comparator is electrically connected with the thirty-third resistor, and is also electrically connected with the master control IC circuit and the first output end of the comparator through an eleventh capacitor and a thirty-second resistor which are connected in series;
a first positive input end of the comparator is respectively and electrically connected with the twelfth capacitor, a thirty-fifth resistor and a thirty-fourth resistor, wherein the thirty-fifth resistor is connected with the twelfth capacitor in parallel;
the thirty-fourth resistor is electrically connected with the forty-first resistor and the forty-second resistor which are connected in series; the thirty-fourth resistor is also electrically connected with the cathode of the fourth diode and the forty-fourth resistor;
a second inverting input end of the comparator is electrically connected with a thirty-sixth resistor and a thirteenth capacitor which are connected in series, the thirteenth capacitor is electrically connected with a second output end of the comparator, the thirteenth capacitor is also electrically connected with a grid electrode of the third mos tube through a thirty-seventh resistor, and the grid electrode and a drain electrode of the third mos tube are connected with a fourteenth capacitor and a thirty-eighth resistor in parallel;
and a second positive input end of the comparator is grounded through the thirty-ninth resistor.
As an embodiment of the present invention: the current limiting IC output circuit includes: the third PWM controller, a forty-third resistor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor and a USB interface; wherein the content of the first and second substances,
a power supply input end of the third PWM controller is electrically connected with the forty-third resistor and the sixteenth capacitor;
the fifteenth capacitor is electrically connected with the other end of the thirteenth resistor and the other end of the sixteenth capacitor;
the output end of the third PWM controller is electrically connected with the USB interface, and a seventeenth capacitor is connected between the voltage input end of the third PWM controller and the grounding end in a linked mode.
As an embodiment of the present invention: and a photoelectric coupling circuit is also arranged between the main control IC circuit and the operation comparison circuit.
As an embodiment of the present invention: the photoelectric coupling circuit comprises a photoelectric coupler, a forty-fourth resistor, a forty-fifth resistor, a forty-sixth resistor, a forty-seventh resistor, a forty-eighth resistor, a forty-ninth resistor, a fifth diode and an eighteenth capacitor; wherein the content of the first and second substances,
the output end of the photoelectric coupler is connected with the forty-fifth resistor in parallel, the negative output end of the photoelectric coupler is electrically connected with the forty-fourth resistor, and the forty-fourth resistor is electrically connected with the forty-seventh resistor and the forty-eighth resistor;
the positive output end of the photoelectric coupler is electrically connected with a forty-sixth resistor and the negative electrode of a fifth diode, the forty-sixth resistor is electrically connected with an eighteenth capacitor, the eighteenth capacitor is respectively electrically connected with the positive electrode of the fifth diode, a forty-ninth resistor and a forty-eighth resistor, and the forty-ninth resistor is also electrically connected with the fifth diode.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic circuit diagram of a desktop multi-port USB charger circuit according to an embodiment of the present invention;
fig. 2 is a circuit structure diagram of a voltage input circuit according to an embodiment of the present invention;
fig. 3 is a circuit structure diagram of a main control IC circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a synchronous rectification IC circuit according to an embodiment of the present invention;
fig. 5 is a circuit diagram of an embodiment of the present invention;
fig. 6 is a circuit diagram of a current limiting IC output circuit according to an embodiment of the present invention;
fig. 7 is a circuit structure diagram of a photoelectric coupling circuit according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1, a desktop type multi-port USB charger circuit includes:
the circuit comprises a voltage input circuit, a transformer, a master control IC circuit, a synchronous rectification IC circuit, an operation comparison circuit and a current-limiting IC output circuit; wherein the content of the first and second substances,
the voltage input circuit is electrically connected with a first input end of the transformer, and the master control IC circuit is electrically connected with a second input end of the transformer;
the output end of the transformer is electrically connected with the synchronous rectification IC circuit;
the feedback input end of the main control IC circuit is electrically connected with the feedback output end of the operation comparison circuit;
the synchronous rectification IC circuit and the operation comparison circuit are electrically connected with the input end of the current-limiting IC circuit.
The utility model discloses a voltage input circuit connects external power source, then carries out the vary voltage through the transformer, through master control IC circuit connection transformer, is responsible for the stored energy in the transformer, and synchronous rectification IC circuit exports after carrying out the filtering with the electric current on purpose, and operation comparison circuit passes through automated inspection, distributes every current-limiting IC output circuit output current. The power supply voltage of the electrical appliance is guaranteed to be stabilized at the preset voltage volt, and stable output power is provided for the electrical appliance. The current-limiting IC output circuit is used for detecting whether each connected charging device overflows or not, and can automatically cut off the output voltage of the port, so that the function of protecting the charging device is achieved.
As an embodiment of the present invention: the number of the current-limiting IC output circuits is 6, and the 6 current-limiting IC output circuits are all connected with the current output ends of the synchronous rectification IC circuit and the operation comparison circuit. In the invention: the number of current limiting IC output circuits is 6, representing: the total number of the 6 current-limiting IC output sub-circuits comprises a first current-limiting IC output sub-circuit, a second current-limiting IC output sub-circuit, a third current-limiting IC output sub-circuit, a fourth current-limiting IC output sub-circuit, a fifth current-limiting IC output sub-circuit, a sixth current-limiting IC output sub-circuit, a first current-limiting IC output sub-circuit, a second current-limiting IC output sub-circuit, a third current-limiting IC output sub-circuit, a fourth current-limiting IC output sub-circuit, a fifth current-limiting IC output sub-circuit and a sixth current-limiting IC output sub-circuit which are connected in parallel on the synchronous rectification IC circuit.
The utility model discloses a set up 6 current-limiting IC output circuit, have 6 USB interfaces to realize charging just on behalf of. The 6 USB interfaces are provided, so that the simultaneous charging of a plurality of electric devices can be met; not only saves space, but also saves time and electricity.
As shown in fig. 2, as an embodiment of the present invention: the voltage input circuit includes: the circuit comprises an AC input port AC, a fuse F1, a first common mode inductor GL1, a first anti-interference capacitor CX1, a first resistor bridge DQ1, a second common mode inductor GL2, a first rectifier BD1, a first electrolytic capacitor CN1, a first capacitor C1, a second resistor bridge DQ2, a second capacitor C2, a ninth resistor R9, a tenth resistor R10 and a third capacitor C3; wherein the content of the first and second substances,
the input end of the AC input port AC is used for being externally connected with an alternating current power supply;
the live wire output end of the AC input port AC is used for being connected with one end of the fuse F1, and the other end of the fuse F1 and the zero line end of the AC input port AC are connected with the input end of the first common mode inductor GL 1; the fuse F1 is used to prevent the voltage and current from being too high.
The output end of the first common mode circuit GL1 is connected in parallel with the first electrolytic capacitor CX1 and a first bridge DQ 1; wherein the content of the first and second substances,
the first bridge DQ1 is composed of a first resistor R1, a second resistor R2, a fourth resistor R4 and a third resistor R3, the first resistor R1 is connected in series with the third resistor R3, the second resistor R2 is connected in series with the fourth resistor R4, and the second resistor R2 and the fourth resistor R4 which are connected in series are connected in parallel to the second common-mode inductor GL 2; in order to solve the electromagnetic interference existing in the commercial power and filter the electromagnetic interference through an electric bridge and an electrolytic capacitor.
The output end of the second common-mode inductor GL2 is connected with the first rectifier BD 1; the first rectifier BD1 is used to convert the ac power of the commercial power into dc power.
The output end of the first rectifier BD1 is connected in parallel with the first electrolytic capacitor CN1, the first capacitor C1 and the second resistor bridge DQ 2; the first rectifier BD1 is used for converting alternating current into direct current. The first electrolytic capacitor CN1, the first capacitor C1 and the second resistor bridge DQ2 form a second filtering circuit to realize filtering of direct current.
The second bridge DQ2 is composed of a fifth resistor R5, a sixth resistor R6, a seventh resistor R7 and an eighth resistor R8, the fifth resistor R5 and the seventh resistor R7 are connected in series, the sixth resistor R6 and the eighth resistor R8 are connected in series, the end of the sixth resistor R6 connected with the first rectifier BD1 is further connected with the anode of a second capacitor C2, and the anode of the second capacitor C2 is connected with a ninth resistor R9 and a tenth resistor R10 which are connected in parallel;
the ninth resistor R9 and the tenth resistor R10 are further connected with the cathode of a first diode D1, and the cathode of the first diode D1 is further electrically connected with the seventh resistor R7 and the eighth resistor R8; the first diode D1 is used to transmit the control command of the master IC circuit to the voltage input circuit. The ninth resistor R9 and the tenth resistor R10 achieve a shunt.
The positive input end of the first rectifier BD1 is further connected with a third capacitor C3 and a first input end of a transformer T1; the transformer T1 realizes a transforming function.
The anode of the first diode D1 is electrically connected to the second input terminal of the transformer T1 and the master IC circuit.
The current voltage is filtered again after the current conversion to direct current by means of a second bridge DQ 2.
As shown in fig. 3, as an embodiment of the present invention: the master control IC circuit comprises a first PWM controller PWM1, an eleventh resistor R11, a fourth capacitor C4, a twelfth resistor R12, a thirteenth resistor R13, a fifth capacitor C5, a sixth capacitor C6, a fourteenth resistor R14, a fifteenth resistor R15, a second electrolytic resistor CN2, a seventh capacitor C7, an eighth capacitor C8, a sixteenth resistor R16, a second diode D2, a seventeenth resistor R17, an eighteenth resistor R18, a third diode D3, a nineteenth resistor R19, a first MOS transistor Q1, a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24 and a twenty-fifth resistor R25; wherein the content of the first and second substances,
a voltage feedback end of the first PWM controller PWM1, the fourth capacitor C4 and an eleventh resistor R11; the eleventh resistor R11 is used to connect a photo-coupling circuit, which is electrically connected to the operation comparator circuit.
The signal access end of the first PWM controller PWM1 is connected to the gate of the first MOS transistor Q1 through an eighteenth resistor R18 and a third diode D3 which are connected in parallel, and the gate of the first MOS transistor Q1 is also grounded through a nineteenth resistor R19; the drain electrode of the first MOS tube Q1 is electrically connected with the anode of a first diode D1; the first MOS tube Q1 belongs to a cooperative switch tube and is used for controlling the on-off of the main control IC circuit, namely controlling the on-off of charging and power-off when charging.
The power supply terminal of the first PWM controller PWM1 is electrically connected with the voltage input circuit and the first input terminal of the transformer T1 through a thirteenth resistor R13 and a twelfth resistor R12 which are connected in series; the thirteenth resistor R13 and the twelfth resistor R12 are connected in series to step down when the transformer supplies power to the main control IC circuit.
The power supply terminal of the first PWM controller PWM1 is also grounded through a fifth capacitor C5 and a sixth capacitor C6; belonging to the filtering of the power supply section
The power supply terminal of the first PWM controller PWM1 is electrically connected with the second electrolytic resistor CN2 through the fourteenth resistor R14;
the fourteenth resistor R14 is connected in series with a fifteenth resistor R15, and the fifteenth resistor R15 is electrically connected to the third input terminal of the transformer T1 through an eighth capacitor C8 and a sixteenth resistor R16 which are connected in series; the fifteenth resistor R15 is further connected to the cathode of the second diode D2, the anode of the second diode D2 is electrically connected to the synchronous rectification IC circuit through a seventeenth resistor R17, and the anode of the second diode D2 is further electrically connected to the third input terminal of the transformer T1;
a signal output pin of the first PWM controller PWM1 is electrically connected to one end of the seventh capacitor C7 and one end of a twentieth resistor R20; the other end of the seventh capacitor C7 is electrically connected to one end of the twenty-first resistor R21, the twenty-second resistor R22, the twenty-third resistor R23, the twenty-fourth resistor R24 and the twenty-fifth resistor R25, and the other end of the twenty-first resistor R21, the twenty-second resistor R22, the twenty-third resistor R23, the twenty-fourth resistor R24 and the twenty-fifth resistor R25 is electrically connected to the other end of the seventh capacitor R2; one end of the twenty-fifth resistor R25, which is connected to the twentieth resistor R20, is also connected to the source of the first MOS transistor Q1.
The utility model discloses in when power master control IC (first PWM controller PWM1) switch MOS pipe Q1 in coordination switches on, the induced voltage of high frequency transformer T1 primary winding is for going up under the burden, and secondary winding's induced voltage is under the burden, and synchronous rectification MOS pipe Q1 is in the off-state, stores energy in the primary winding this moment. When the switch MOS tube Q1 is cut off, the inductive voltage of the primary winding of the high-frequency transformer T1 is up-negative and down-positive, and the inductive voltage of the secondary winding is up-positive and down-negative, because the inductive current can not change suddenly; the energy stored in the primary winding of the transformer T1 is filtered by the secondary winding and the synchronous rectification MOS tube Q1 and the secondary solid-state capacitor and then output to the load.
As shown in fig. 4, as an embodiment of the present invention: the synchronous rectification IC circuit comprises a second PWM controller PWM2, a twenty-sixth resistor R26, a twenty-seventh resistor R27, a second mos tube Q2, a twenty-eighth resistor R28, a twenty-ninth resistor R29, a ninth capacitor C9, a tenth capacitor C10, a third electrolytic capacitor CN3, a fourth electrolytic capacitor CN4, a fifth electrolytic capacitor CN5, a first LED diode LED1, a thirty-third resistor R30 and a thirty-first resistor R31; wherein the content of the first and second substances,
a first output end of the transformer T1 is electrically connected with a power input pin of the second PWM controller WM2, an anode of the third electrolytic capacitor CN3, an anode of the fourth electrolytic capacitor CN4, an anode of the fifth electrolytic capacitor CN5 and an anode of the first LED diode LED 1;
a second output end of the transformer T1 is electrically connected with a negative electrode of the third electrolytic capacitor CN3, a negative electrode of the fourth electrolytic capacitor CN4, a negative electrode of the fifth electrolytic capacitor CN5, a negative electrode of the thirty-first resistor R30 and a positive electrode of the thirty-first resistor R31 through a twenty-ninth resistor R29 and a tenth capacitor C10 which are connected in series; wherein the content of the first and second substances,
the tenth capacitor C10 is connected to the power input terminal of the second PWM controller PWM2 through a ninth capacitor C9;
the ground terminal of the second PWM controller PWM2 is electrically connected with the source electrode of the second mos transistor Q2;
a signal input end of the second PWM controller PWM2 is electrically connected with a grid electrode of the second mos transistor Q2 through a second eighteen-resistor R28;
the drain of the second mos transistor Q2 is electrically connected to the second input terminal of the transformer T1.
The synchronous rectification IC circuit achieves a current synchronous transmission function based on the second PWM controller, the two MOS tubes Q2 belong to rectification MOS tubes and are used for outputting rectified and filtered current to a load, and the first LED diode LED1 displays a charging state.
The utility model discloses in order to realize synchronous rectification output, the utility model discloses a synchronous rectification IC circuit realizes the circuit filtering based on ninth electric capacity C9, tenth electric capacity C10, third electrolytic capacitor CN3, fourth electrolytic capacitor CN4, fifth electrolytic capacitor CN 5. The first LED diode LED1 is used to indicate whether charging is in progress. The second PWM controller PWM2 is used to control the transformed current and voltage for charging.
As shown in fig. 5, as an embodiment of the present invention: the operation comparison circuit includes: a comparator B, a thirty-second resistor R32, an eleventh capacitor C11, a thirty-third resistor R33, a thirty-fourth resistor R34, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-seventh resistor R37, a thirty-eighth resistor R38, a thirty-ninth resistor R39, a forty-fourth resistor R40, a forty-first resistor R41, a forty-second resistor R42, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a third mos transistor Q3 and a fourth diode D4; wherein the content of the first and second substances,
the first inverting input end of the comparator B is electrically connected with the thirty-third resistor R33, and is also electrically connected with the master IC circuit and the first output end of the comparator B through an eleventh capacitor C11 and a thirty-second resistor R32 which are connected in series;
a first positive input end of the comparator B is respectively and electrically connected with the twelfth capacitor C12, a thirty-fifth resistor R35 and a thirty-fourth resistor R34, and the thirty-fifth resistor R35 is connected with the twelfth capacitor C12 in parallel;
the thirty-fourth resistor R34 is electrically connected with the forty-first resistor R41 and the forty-second resistor R42 which are connected in series; the thirty-fourth resistor R34 is also electrically connected with the cathode of the fourth diode D4 and the forty-fourth resistor R40;
the second inverting input end of the comparator B is electrically connected with a thirty-sixth resistor R36 and a thirteenth capacitor C13 which are connected in series, the thirteenth capacitor C13 is electrically connected with the second output end of the comparator B, the thirteenth capacitor C13 is also electrically connected with the gate of the third mos tube Q3 through the thirty-seventh resistor R37, and the gate and the drain of the third mos tube Q3 are connected with a fourteenth capacitor C14 and a thirty-eighth resistor R38 in parallel;
the second positive input terminal of the comparator B is grounded through the thirty-ninth resistor R39.
When the output end is connected to a single electric appliance load for charging, the current operational amplifier comparator O can automatically detect and distribute the current load capacity of outputting 2.4A at most by a single port; when the output end is connected with six full-load electric appliance loads for charging, the current operational amplifier comparator O can detect the current of the output end, provide the maximum current load capacity of 12A (namely, evenly distribute the load current of each Vbus port 2A), and achieve the effect of intelligently and adaptively distributing the output current; when the output end is connected to an electric appliance load for charging, the voltage drop compensation circuit of the current operational amplifier comparator O can intelligently compensate the voltage of the output end, so that the power supply voltage of the electric appliance is ensured to be stabilized at about 5V, and stable output power is provided for the electric appliance.
As shown in fig. 6, as an embodiment of the present invention: the current limiting IC output circuit includes: a third PWM controller PWM3, a forty-third resistor R43, a fifteenth capacitor C15, a sixteenth capacitor C16, a seventeenth capacitor C17 and a USB port USB 1; wherein the content of the first and second substances,
a power supply input terminal of the third PWM controller PWM3 is electrically connected to the forty-third resistor R43 and the sixteenth capacitor C16;
the fifteenth capacitor C15 is electrically connected with the other end of the thirteenth resistor R13 and the other end of the sixteenth capacitor C16;
an output end of the third PWM controller PWM3 is electrically connected to the USB interface, and a seventeenth capacitor C17 is connected between a voltage input end of the third PWM controller PWM3 and the ground end. When the output circuit of the output end current-limiting IC exceeds the maximum detection current of 2.7A of the current-limiting detection IC (CW3047), the output voltage of the port is automatically cut off; the function of protecting the charging equipment is achieved.
As an embodiment of the present invention: and a photoelectric coupling circuit is also arranged between the main control IC circuit and the operation comparison circuit. For effecting switching of current feedback in the charging circuit.
As shown in fig. 7, as an embodiment of the present invention: the photoelectric coupling circuit comprises a photoelectric coupler O, a forty-fourth resistor R44, a forty-fifth resistor R45, a forty-sixth resistor R46, a forty-seventh resistor R47, a forty-eighth resistor R48, a forty-ninth resistor R49, a fifth diode D5 and an eighteenth capacitor C18; wherein the content of the first and second substances,
the output end of the photoelectric coupler O is connected with the forty-fifth resistor R45 in parallel, the negative electrode output end of the photoelectric coupler O is electrically connected with the forty-fourth resistor R44, and the forty-fourth resistor R44 is electrically connected with the forty-seventh resistor R47 and the forty-eighth resistor R48;
an anode output end of the photocoupler O is electrically connected with the forty-sixth resistor R46 and the cathodes of the fifth diode D5, the forty-sixth resistor R46 is electrically connected with the eighteenth capacitor C18, the eighteenth capacitor C18 is electrically connected with the anode of the fifth diode D5, the forty-ninth resistor R49 and the forty-eighth resistor R48, respectively, and the forty-ninth resistor R49 is further electrically connected with the fifth diode D5.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A desktop multi-port USB charger circuit, comprising:
the circuit comprises a voltage input circuit, a transformer, a master control IC circuit, a synchronous rectification IC circuit, an operation comparison circuit and a current-limiting IC output circuit; wherein the content of the first and second substances,
the voltage input circuit is electrically connected with a first input end of the transformer, and the master control IC circuit is electrically connected with a second input end of the transformer;
the output end of the transformer is electrically connected with the synchronous rectification IC circuit;
the feedback input end of the main control IC circuit is electrically connected with the feedback output end of the operation comparison circuit;
the synchronous rectification IC circuit and the operation comparison circuit are electrically connected with the input end of the current-limiting IC circuit.
2. The desktop type multi-port USB charger circuit as claimed in claim 1, wherein the number of the current limiting IC output circuits is 6, and the 6 current limiting IC output circuits are all connected to the current output terminals of the synchronous rectification IC circuit and the operation comparison circuit.
3. The desktop multi-port USB charger circuit of claim 1, wherein the voltage input circuit comprises: the circuit comprises an AC input port, a fuse, a first common-mode inductor, a first anti-interference capacitor, a first resistance bridge, a second common-mode inductor, a first rectifier, a first electrolytic capacitor, a first capacitor, a second resistance bridge, a second capacitor, a ninth resistor, a tenth resistor and a third capacitor; wherein the content of the first and second substances,
the input end of the AC input port is used for being externally connected with an alternating current power supply;
the live wire output end of the AC input port is used for being connected with one end of the fuse, and the other end of the fuse and the zero line end of the AC input port are connected with the input end of the first common mode inductor;
the output end of the first common mode circuit is connected with the first electrolytic capacitor and the first bridge in parallel; wherein the content of the first and second substances,
the first bridge consists of a first resistor, a second resistor, a fourth resistor and a third resistor, the first resistor is connected with the third resistor in series, the second resistor is connected with the fourth resistor in series, and the second resistor and the fourth resistor which are connected in series are connected with the second common-mode inductor in parallel;
the output end of the second common mode inductor is connected with the first rectifier;
the output end of the first rectifier is connected with the first electrolytic capacitor, the first capacitor and the second resistance bridge in parallel; wherein the content of the first and second substances,
the second resistance bridge is composed of a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor, the fifth resistor and the seventh resistor are connected in series, the sixth resistor and the eighth resistor are connected in series, one end of the sixth resistor, which is connected with the first rectifier, is also connected with the anode of a second capacitor, and the anode of the second capacitor is connected with a ninth resistor and a tenth resistor which are connected in parallel;
the ninth resistor and the tenth resistor are also connected with the cathode of a first diode, and the cathode of the first diode is also electrically connected with the seventh resistor and the eighth resistor;
the positive input end of the first rectifier is also connected with a third capacitor and a first input end of a transformer;
and the anode of the first diode, the second input end of the transformer and the master control IC circuit.
4. The desktop type multi-port USB charger circuit as claimed in claim 1, wherein the main control IC circuit comprises a first PWM controller, an eleventh resistor, a fourth capacitor, a twelfth resistor, a thirteenth resistor, a fifth capacitor, a sixth capacitor, a fourteenth resistor, a fifteenth resistor, a second electrolytic resistor, a seventh capacitor, an eighth capacitor, a sixteenth resistor, a second diode, a seventeenth resistor, an eighteenth resistor, a third diode, a nineteenth resistor, a first MOS transistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor and a twenty-fifth resistor; wherein the content of the first and second substances,
a voltage feedback end of the first PWM controller, the fourth capacitor and the eleventh resistor;
the signal access end of the first PWM controller is connected with the grid electrode of the first MOS tube through an eighteenth resistor and a third diode which are connected in parallel, and the grid electrode of the first MOS tube is grounded through a nineteenth resistor; the drain electrode of the first MOS tube is electrically connected with the anode of the first diode;
the power supply end of the first PWM controller is electrically connected with the voltage input circuit and the first input end of the transformer through a thirteenth resistor and a twelfth resistor which are connected in series;
the power supply end of the first PWM controller is grounded through a fifth capacitor and a sixth capacitor;
the power supply end of the first PWM controller is electrically connected with the second electrolytic resistor through the fourteenth resistor;
the fourteenth resistor is connected in series with a fifteenth resistor, and the fifteenth resistor is electrically connected with the third input end of the transformer through an eighth capacitor and a sixteenth resistor which are connected in series; the fifteenth resistor is further connected with the cathode of the second diode, the anode of the second diode is electrically connected with the synchronous rectification IC circuit through a seventeenth resistor, and the anode of the second diode is further electrically connected with the third input end of the transformer;
a signal output pin of the first PWM controller is electrically connected with one end of the seventh capacitor and one end of the twentieth resistor; the other end of the seventh capacitor is electrically connected with one end of the twenty-first resistor, the twenty-second resistor, the twenty-third resistor, the twenty-fourth resistor and the twenty-fifth resistor respectively, and the other end of the twenty-first resistor, the twenty-second resistor, the twenty-third resistor, the twenty-fourth resistor and the twenty-fifth resistor is electrically connected with the other end of the seventh capacitor; and one end of the twenty-fifth resistor, which is connected with the twentieth resistor, is also connected with the source electrode of the first MOS transistor.
5. The desktop multi-port USB charger circuit of claim 1, wherein the synchronous rectification IC circuit comprises a second PWM controller, a twenty-sixth resistor, a twenty-seventh resistor, a second mos tube, a twenty-eighth resistor, a twenty-ninth resistor, a ninth capacitor, a tenth capacitor, a third electrolytic capacitor, a fourth electrolytic capacitor, a fifth electrolytic capacitor, a first LED diode, a thirty-th resistor and a thirty-first resistor; wherein the content of the first and second substances,
the first output end of the transformer is electrically connected with a power input pin of the second PWM controller, the anode of the third electrolytic capacitor, the anode of the fourth electrolytic capacitor, the anode of the fifth electrolytic capacitor and the anode of the first LED diode;
a second output end of the transformer is electrically connected with a negative electrode of the third electrolytic capacitor, a negative electrode of the fourth electrolytic capacitor, a negative electrode of the fifth electrolytic capacitor, a negative electrode of the thirtieth resistor and a positive electrode of the thirty-first resistor through a twenty-ninth resistor and a tenth capacitor which are connected in series; wherein the content of the first and second substances,
the tenth capacitor is connected with the power supply input end of the second PWM controller through a ninth capacitor;
the grounding end of the second PWM controller is electrically connected with the source electrode of the second mos tube;
a signal input end of the second PWM controller is electrically connected with a grid electrode of the second mos tube through a twenty-eighth resistor;
and the drain electrode of the second mos tube is electrically connected with the second input end of the transformer.
6. The desktop multi-port USB charger circuit of claim 1, wherein the operation comparison circuit comprises: the circuit comprises a comparator, a thirty-second resistor, an eleventh capacitor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, a thirty-seventh resistor, a thirty-eighth resistor, a thirty-ninth resistor, a forty-fourth resistor, a forty-first resistor, a forty-second resistor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a third mos tube and a fourth diode; wherein the content of the first and second substances,
the first reverse input end of the comparator is electrically connected with the thirty-third resistor, and is also electrically connected with the master control IC circuit and the first output end of the comparator through an eleventh capacitor and a thirty-second resistor which are connected in series;
a first positive input end of the comparator is respectively and electrically connected with the twelfth capacitor, a thirty-fifth resistor and a thirty-fourth resistor, wherein the thirty-fifth resistor is connected with the twelfth capacitor in parallel;
the thirty-fourth resistor is electrically connected with the forty-first resistor and the forty-second resistor which are connected in series; the thirty-fourth resistor is also electrically connected with the cathode of the fourth diode and the forty-fourth resistor;
a second inverting input end of the comparator is electrically connected with a thirty-sixth resistor and a thirteenth capacitor which are connected in series, the thirteenth capacitor is electrically connected with a second output end of the comparator, the thirteenth capacitor is also electrically connected with a grid electrode of the third mos tube through a thirty-seventh resistor, and the grid electrode and a drain electrode of the third mos tube are connected with a fourteenth capacitor and a thirty-eighth resistor in parallel;
and a second positive input end of the comparator is grounded through the thirty-ninth resistor.
7. The desktop multi-port USB charger circuit of claim 1, wherein the current limiting IC output circuit comprises: the third PWM controller, a forty-third resistor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor and a USB interface; wherein the content of the first and second substances,
a power supply input end of the third PWM controller is electrically connected with the forty-third resistor and the sixteenth capacitor;
the fifteenth capacitor is electrically connected with the other end of the thirteenth resistor and the other end of the sixteenth capacitor;
the output end of the third PWM controller is electrically connected with the USB interface, and a seventeenth capacitor is connected between the voltage input end of the third PWM controller and the grounding end in a linked mode.
8. The desktop type multi-port USB charger circuit as claimed in claim 1, wherein a photocoupling circuit is further disposed between the main control IC circuit and the operation comparison circuit.
9. The desktop type multi-port USB charger circuit as claimed in claim 8, wherein the photoelectric coupling circuit comprises a photoelectric coupler, a forty-fourth resistor, a forty-fifth resistor, a forty-sixth resistor, a forty-seventh resistor, a forty-eighth resistor, a forty-ninth resistor, a fifth diode and an eighteenth capacitor; wherein the content of the first and second substances,
the output end of the photoelectric coupler is connected with the forty-fifth resistor in parallel, the negative output end of the photoelectric coupler is electrically connected with the forty-fourth resistor, and the forty-fourth resistor is electrically connected with the forty-seventh resistor and the forty-eighth resistor;
the positive output end of the photoelectric coupler is electrically connected with a forty-sixth resistor and the negative electrode of a fifth diode, the forty-sixth resistor is electrically connected with an eighteenth capacitor, the eighteenth capacitor is respectively electrically connected with the positive electrode of the fifth diode, a forty-ninth resistor and a forty-eighth resistor, and the forty-ninth resistor is also electrically connected with the fifth diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120240871.6U CN214590734U (en) | 2021-01-28 | 2021-01-28 | Desktop type multi-port USB charger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120240871.6U CN214590734U (en) | 2021-01-28 | 2021-01-28 | Desktop type multi-port USB charger circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214590734U true CN214590734U (en) | 2021-11-02 |
Family
ID=78314597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120240871.6U Active CN214590734U (en) | 2021-01-28 | 2021-01-28 | Desktop type multi-port USB charger circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214590734U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114567033A (en) * | 2022-02-21 | 2022-05-31 | 湖南炬神电子有限公司 | Circuit for improving conversion efficiency of multi-port charger |
-
2021
- 2021-01-28 CN CN202120240871.6U patent/CN214590734U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114567033A (en) * | 2022-02-21 | 2022-05-31 | 湖南炬神电子有限公司 | Circuit for improving conversion efficiency of multi-port charger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204217167U (en) | Single live wire touches lamp control switch | |
| TWM541146U (en) | Integrated uninterruptible power supply | |
| CN214590734U (en) | Desktop type multi-port USB charger circuit | |
| CN102044981B (en) | Switching power supply with capacitor discharge circuit | |
| CN201234142Y (en) | Bus control apparatus for solar photovoltaic grid connection DC-to-AC converter | |
| CN208589916U (en) | It is a kind of with overvoltage protection and it is anti-sparking function dc power interface circuit | |
| CN201349179Y (en) | Switching power supply circuit of pulping machine | |
| CN202178711U (en) | Dual supply output circuit possessing ultralow no-load power consumption and high efficiency under low load | |
| CN209881475U (en) | Small-size switching power supply charging circuit | |
| CN101640407B (en) | Power supply conversion device and method thereof | |
| CN106940392B (en) | External circuit breaker of electric energy meter with automatic switching-on and switching-off function | |
| CN202696482U (en) | Power supply circuit for leakage circuit breaker | |
| CN106787853B (en) | Flyback switching power supply | |
| CN102044911B (en) | FTU terminal power supply real-time monitoring device for power distribution monitoring system | |
| CN212781729U (en) | Power controller of marking machine | |
| CN212061818U (en) | Display device | |
| CN209488448U (en) | Inverter overload protecting circuit | |
| CN102983736A (en) | AC-DC switch power source having power factor correcting function | |
| CN207910696U (en) | A kind of air conditioner protection circuit of direct-current switch power supply power supply | |
| CN207321108U (en) | The HV pins protection circuit of pwm chip | |
| CN207039471U (en) | A kind of supply unit of zero stand-by power consumption | |
| CN111384844A (en) | Power supply circuit for inhibiting instant starting-up impact current | |
| CN206259752U (en) | Integrated uninterruptible power supply provider | |
| CN218449863U (en) | Reclosing power supply circuit | |
| CN103973141A (en) | Full-direct-current variable frequency air conditioner supplied with electricity by using switching power supply circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |