CN214315075U - Power adapter with low power consumption - Google Patents
Power adapter with low power consumption Download PDFInfo
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- CN214315075U CN214315075U CN202023152442.8U CN202023152442U CN214315075U CN 214315075 U CN214315075 U CN 214315075U CN 202023152442 U CN202023152442 U CN 202023152442U CN 214315075 U CN214315075 U CN 214315075U
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Abstract
The utility model discloses a power adapter that low power dissipation, include: the input end of the rectification filtering unit is connected with the input end of the circuit; a transformer T1A, the primary side of which is connected with the output end of the rectifying and filtering unit; the input end of the secondary filtering unit is connected with the secondary side of the transformer; the input end of the photoelectric coupling unit is connected with the output end of the secondary filtering unit, and the output end of the photoelectric coupling unit is connected with the first switch unit; a first switching unit, an input end of which is connected with a primary side of the transformer; the control unit is connected with the output end of the secondary filtering unit, the input end of the photoelectric coupling unit and the circuit output interface J1; and the second switch unit comprises a transistor Q1 and a capacitor C10. Through implementing the utility model discloses can realize reducing the resistance of the switch circuit of power adapter circuit output interface, reduce the consumption of circuit, and then reduce power adapter's the degree of generating heat.
Description
Technical Field
The utility model relates to a power adapter's technical field especially relates to a power adapter that low power dissipation.
Background
The power adapter is a power supply conversion device of small portable electronic equipment and electronic appliances, and can be divided into an alternating current output type and a direct current output type according to the output type; according to the connection mode, the device can be divided into a wall-inserting type and a desktop type.
In the power adapter in the prior art, the number of resistors arranged on the switch circuit for controlling the on-off of the output interface of the circuit is large, the circuit structure is complex, and the whole charging circuit is large in power consumption and serious in heating.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power adapter that low power dissipation aims at solving among the prior art problem that the switch department resistance quantity of charging circuit more leads to the consumption big among the power adapter circuit.
The utility model provides a power adapter that low power dissipation, including circuit input end and circuit output interface J1, still include:
the input end of the rectification filtering unit is connected with the circuit input end and is used for rectifying and filtering the electric signal input by the circuit input end;
the primary side of the transformer T1A is connected with the output end of the rectifying and filtering unit and is used for adjusting the voltage of the electric signal;
the input end of the secondary filtering unit is connected with the secondary side of the transformer and used for filtering the transformed electric signal, and the output end of the secondary filtering unit outputs an output voltage V +;
the input end of the first switch unit is connected with the primary side of the transformer, and the first switch unit controls the on-off of the transformer according to a judgment signal FB 1;
the input end of the photoelectric coupling unit is connected with the output end of the secondary filtering unit, the output end of the photoelectric coupling unit is connected with the first switch unit, and the photoelectric coupling unit is used for providing the judgment signal FB 1;
the control unit is connected with the output end of the secondary filtering unit, the input end of the photoelectric coupling unit and the circuit output interface J1 and is used for outputting a control signal GATEP;
and the second switch unit comprises a triode Q1 and a capacitor C10, wherein a pin 1 of the triode Q1 is connected with the control unit, a pin 2 is connected with the output end of the secondary filtering unit, a pin 3 is grounded through the capacitor C10, and the pin 3 is simultaneously connected with a pin B4 and a pin A4 of the circuit output interface J1, and the triode Q1 is controlled to be switched on and off by the control signal GATEP, so that the circuit output interface J1 is switched on and off.
Further, the control unit includes a control chip U4, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a resistor R16, a resistor RS1 and a resistor RS2, a pin 0 and a pin 2 of the control chip U4 are connected through the capacitor C4, a pin 2 is connected to an output end of the secondary filter unit, a pin 0 is grounded, a pin 7 is grounded through the capacitor C4, a pin 8 of the control chip U4 is connected to a pin a4 and a pin B4 of the circuit output interface J4, a pin 9 of the control chip U4 is connected to the pin a4 and the pin B4 of the circuit output interface J4, a pin 10 of the control chip U4 is connected to a pin B4 of the circuit output interface J4, a pin 11 of the control chip U4 is connected to the pin a4 of the circuit output interface J4, a pin 14 of the control chip U4 is connected to one end of the resistor R4, and a resistor R4 is connected to the other end of the resistor RS 4 One end of the resistor RS2, one end of the resistor RS1 and one end of the resistor RS2 are also connected to the pin 0 of the circuit output interface J1, the other end of the resistor RS1 and the other end of the resistor RS2 are connected to the ground, the pin 15 of the control chip U4 is connected to the ground, the pin 15 of the control chip U4 is connected to one end of the resistor R16 through the capacitor C11, the pin 17 of the control chip U4 is connected to the photocoupling unit through the capacitor C12, the pin 18 of the control chip U4 is connected to the photocoupling unit through the capacitor C15, the pin 20 of the control chip U4 is connected to the photocoupling unit, the pin 4 of the control chip U4 is connected to the pin 1 of the triode Q1, and the pin 4 of the control chip U4 outputs the control signal GATEP.
Further, the rectifying and filtering unit comprises a bridge rectifier circuit DB1, an inductor L1, an inductor L2, a resistor R10, an electrolytic capacitor EC1 and an electrolytic capacitor EC2, an alternating current input end of the bridge rectifier circuit DB1 is connected to the circuit input end, an anode output end of the bridge rectifier circuit DB1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to an anode of the electrolytic capacitor EC2 and an input end of the first switching unit, a cathode of the electrolytic capacitor EC2 is grounded, the resistor R10 is connected in parallel to two ends of the inductor L1, an anode of the electrolytic capacitor EC1 is connected to an anode output end of the bridge rectifier circuit DB1, a cathode of the electrolytic capacitor EC1 is connected to one end of the inductor L2, the other end of the inductor L2 is grounded, and one end of the inductor L2 is connected to a cathode output end of the bridge rectifier circuit DB 1.
Further, the first switch unit includes a control chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a capacitor C3, a capacitor C5, a diode D5, and a diode D5, a pin 1 of the control chip U5 is grounded, a pin 2 of the control chip U5 is sequentially connected to the resistor R5, and the other end of the inductor L5, the pin 2 of the control chip U5 is further connected to a cathode of the diode D5, an anode of the diode D5 is connected to one end of the resistor R5, the other end of the resistor R5 is grounded, one end of the resistor R5 and the other end of the resistor R5 connected in parallel is connected to the pin 4 of the control chip U5, and the other end of the resistor R5 connected in parallel to the ground, a pin 5, a pin 6, a pin 7, and a pin 8 of the control chip U1 are connected to the anode of the diode D2 and the output end of the primary side of the transformer at the same time, the cathode of the diode D2 is connected to one end of the resistor R4, one end of the resistor R3 connected in parallel to the capacitor C3 is connected to the other end of the resistor R4, the other end of the resistor R3 connected in parallel to the capacitor C3 is connected to the other end of the inductor L1, and a pin 3 of the control chip U1 is configured to receive the determination signal FB 1.
Further, the secondary filter unit comprises a control chip U2, a resistor R9, a capacitor C7, a capacitor C8 and an electrolytic capacitor CE4, the pin 5, the pin 6, the pin 7 and the pin 8 of the control chip U2 are all connected with the A-terminal of the secondary side of the transformer T1A, pin 4 of the control chip U2 is connected to the a + terminal of the secondary side of the transformer T1A, and pin 4 of the control chip U2 outputs the output voltage V +, pin 3 of the control chip U2 is grounded through the capacitor C8, the pin 2 of the control chip U2 is connected with the pin 1 of the control chip U2, the pin 1 of the control chip U2 is connected with the negative electrode of the electrolytic capacitor CE4, the pin 4 of the control chip U2 is connected with the anode of the electrolytic capacitor CE4, and the pin 1 of the control chip U2 is connected with the pin 5 of the control chip U2 through the capacitor C7 and the resistor R9 in turn.
Further, the photoelectric coupling unit includes a resistor R12, a resistor R13, a photoelectric coupler U3 and a capacitor C4, one end of the resistor R12 is connected to the pin 4 of the control chip U2, the other end of the resistor R13 is connected to the anode of the light emitting diode of the photoelectric coupler U3, two ends of the resistor R13 are respectively connected to two ends of the light emitting diode, two ends of the capacitor C4 are respectively connected to the pin 3 and the pin 2 of the triode of the photoelectric coupler U3, the pin 2 of the triode of the photoelectric coupler U3 is grounded, the pin 3 of the triode of the photoelectric coupler U3 is connected to the pin 3 of the control chip U1, and the pin 3 of the triode of the photoelectric coupler U3 outputs the determination signal FB 1.
Further, the capacitor device further comprises a capacitor CY1, and the negative electrode of the electrolytic capacitor EC2, the other end of the inductor L2, the pin 1 of the control chip U1, the other end of the resistor R5, the other end of the capacitor C5, the other end of the resistor R7 and the resistor R8 which are connected in parallel, and the pin 2 of the triode of the photocoupler U3 are all grounded through the capacitor CY 1.
Compared with the prior art, the beneficial effects of the utility model are that: the number of resistors is reduced through the second switch unit used for controlling the on-off of the circuit output interface, only the triode and the capacitor are arranged, the on-off of the triode is controlled through the control signal, and then the on-off of the circuit output interface is controlled. Through implementing the utility model discloses can realize reducing the resistance of the switch circuit of power adapter circuit output interface, reduce the consumption of circuit, and then reduce power adapter's the degree of generating heat.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
FIG. 1 illustrates a block circuit diagram of a low power adapter;
fig. 2 shows a circuit connection diagram of a power adapter with low power consumption.
In the figure:
a circuit input terminal 1; a rectification filter unit 2; a secondary filtering unit 3; a photoelectric coupling unit 4; a first switch unit 5; a control unit 6; a second switching unit 7.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1-2, the preferred embodiment of the present invention is shown.
The power adapter with low power consumption provided by this embodiment, as shown in fig. 1-2, includes a circuit input terminal 1 and a circuit output interface J1, and further includes: the input end of the rectification filtering unit 2 is connected with the circuit input end 1 and is used for rectifying and filtering the electric signal input by the circuit input end 1; the primary side of the transformer T1A is connected with the output end of the rectifying and filtering unit 2 and is used for adjusting the voltage of the electric signal; the input end of the secondary filtering unit 3 is connected with the secondary side of the transformer and is used for filtering the transformed electric signal, and the output end of the secondary filtering unit 3 outputs an output voltage V +; the input end of the photoelectric coupling unit 4 is connected with the output end of the secondary filtering unit 3, the output end of the photoelectric coupling unit 4 is connected with the first switch unit 5, and the photoelectric coupling unit 4 is used for providing a judgment signal FB 1; the input end of the first switch unit 5 is connected with the primary side of the transformer, and the first switch unit 5 controls the on-off of the transformer according to the judgment signal FB 1; the control unit 6 is connected with the output end of the secondary filtering unit 3, the input end of the photoelectric coupling unit 4 and the circuit output interface J1 and is used for outputting a control signal GATEP; and the second switch unit 7 comprises a triode Q1 and a capacitor C10, a pin 1 of the triode Q1 is connected with the control unit 6, a pin 2 is connected with the output end of the secondary filtering unit 3, the pin 3 is grounded through the capacitor C10, the pin 3 is simultaneously connected with a pin B4 and a pin A4 of the circuit output interface J1, and the on-off of the triode Q1 is controlled by a control signal GATEP, so that the circuit output interface J1 is switched on and off.
The number of resistors is reduced through the second switch unit 7 for controlling the on-off of the circuit output interface, only the triode and the capacitor are arranged, the on-off of the triode is controlled through the control signal, and then the on-off of the circuit output interface is controlled. Through implementing the utility model discloses can realize reducing the resistance of the switch circuit of power adapter circuit output interface, reduce the consumption of circuit, and then reduce power adapter's the degree of generating heat.
In this embodiment, the control unit 6 includes a control chip U, a capacitor C, a capacitor R, a resistor RS and a resistor RS, the pin 0 and the pin 2 of the control chip U are connected via the capacitor C, the pin 2 is connected to the output terminal of the secondary filter unit 3, the pin 0 is grounded, the pin 7 is grounded via the capacitor C, the pin 8 of the control chip U is connected to the pin a and the pin B of the circuit output interface J, the pin 9 of the control chip U is connected to the pin a and the pin B of the circuit output interface J, the pin 10 of the control chip U is connected to the pin B of the circuit output interface J, the pin 11 of the control chip U is connected to the pin a of the circuit output interface J, the pin 14 of the control chip U is connected to one end of the resistor R, the other end of the resistor R is simultaneously connected to one end of the resistor RS and one end of the resistor RS are simultaneously connected to the pin 0 of the circuit output interface J, the other ends of the resistor RS1 and the resistor RS2 are grounded simultaneously, the pin 15 of the control chip U4 is grounded, the pin 15 of the control chip U4 is connected with one end of the resistor R16 through a capacitor C11, the pin 17 of the control chip U4 is connected with the photoelectric coupling unit 4 through a capacitor C12, the pin 18 of the control chip U4 is connected with the photoelectric coupling unit 4 through a capacitor C15, the pin 20 of the control chip U4 is connected with the photoelectric coupling unit 4, the pin 4 of the control chip U4 is connected with the pin 1 of the triode Q1, and the pin 4 of the control chip U4 outputs a control signal GATEP. The circuit output interface J1 is used for being connected with the equipment of waiting to charge, the equipment of waiting to charge can be cell-phone, notebook computer, panel computer etc. electronic product, control chip U4 is CH236D chip, pin 4 through control chip U4 outputs control signal GATEP, and then realizes the on-off control to triode Q1, when the circuit was excessive pressure or when overflowing, control chip U4 control circuit output interface J1 disconnection, thereby the equipment of waiting to charge is protected.
In this embodiment, the rectifying and filtering unit 2 includes a bridge rectifier circuit DB1, an inductor L1, an inductor L2, a resistor R10, an electrolytic capacitor EC1 and an electrolytic capacitor EC2, an ac input end of the bridge rectifier circuit DB1 is connected to the circuit input end 1, an anode output end of the bridge rectifier circuit DB1 is connected to one end of the inductor L1, the other end of the inductor L1 is connected to an anode of the electrolytic capacitor EC2 and an input end of the first switching unit 5, a cathode of the electrolytic capacitor EC2 is grounded, the resistor R10 is connected in parallel to both ends of the inductor L1, an anode of the electrolytic capacitor EC1 is connected to an anode output end of the bridge rectifier circuit DB1, a cathode of the electrolytic capacitor EC1 is connected to one end of the inductor L2, the other end of the inductor L2 is grounded, and one end of the inductor L2 is connected to a cathode output end of the bridge rectifier circuit DB 1. Circuit input 1 connects external circuit's live wire L and zero line N, is connected with safeties between live wire L and bridge rectifier circuit DB 1's the AC input end, and bridge rectifier circuit DB1 carries out the rectification conversion to the alternating current earlier and becomes the direct current, thereby rectifier filter unit 2 carries out the filtering to the direct current again and reduces signal interference, obtains stable signal.
In this embodiment, the first switch unit 5 includes a control chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a capacitor C3, a capacitor C5, a diode D1, and a diode D2, a pin 1 of the control chip U1 is grounded, a pin 2 of the control chip U1 is sequentially connected to the other ends of the resistor R2, the resistor R1, and the inductor L1, a pin 2 of the control chip U1 is further connected to a cathode of the diode D1, an anode of the diode D1 is connected to one end of the resistor R5, a second end of the resistor R5 is grounded, one end of the capacitor C5 is connected to a cathode of the diode D1, a second end of the capacitor C5 is grounded, one end of the resistor R7 and the resistor R8 connected in parallel is connected to a pin 4 of the control chip U1, a second end of the resistor R7 and the resistor R8 connected in parallel is grounded, a second end of the transformer 2 is connected to a primary side of the pin 5, a pin 7 and a pin 898 of the control chip U1, the negative electrode of the diode D2 is connected with one end of the resistor R4, one end of the resistor R3 connected with the capacitor C3 in parallel is connected with the other end of the resistor R4, the other end of the resistor R3 connected with the capacitor C3 in parallel is connected with the other end of the inductor L1, and the pin 3 of the control chip U1 is used for receiving the judgment signal FB 1. When the photocoupling unit 4 outputs the judgment signal FB1, the control chip U1 receives the judgment signal FB1 and disconnects the input terminal of the primary side of the transformer T1A, so that the entire power adapter circuit is disconnected and the power adapter stops operating.
In this embodiment, the secondary filtering unit 3 includes a control chip U2, a resistor R9, a capacitor C7, a capacitor C8, and an electrolytic capacitor CE4, where a pin 5, a pin 6, a pin 7, and a pin 8 of the control chip U2 are all connected to an a-terminal of a secondary side of a transformer T1A, a pin 4 of the control chip U2 is connected to an a + terminal of a secondary side of the transformer T1A, a pin 4 of the control chip U2 outputs an output voltage V +, a pin 3 of the control chip U2 is grounded through the capacitor C8, a pin 2 of the control chip U2 is connected to a pin 1 of the control chip U2, a pin 1 of the control chip U2 is connected to a negative electrode of the electrolytic capacitor CE4, a pin 4 of the control chip U2 is connected to a positive electrode of the electrolytic capacitor CE4, and a pin 1 of the control chip U2 is connected to a pin 5 of the control chip U2 through the capacitor C7 and the resistor R9 in sequence. The secondary filter unit 3 filters the ac power obtained at the secondary side of the transformer T1A to obtain a stable electric signal.
In this embodiment, the photoelectric coupling unit 4 includes a resistor R12, a resistor R13, a photoelectric coupler U3 and a capacitor C4, one end of the resistor R12 is connected to the pin 4 of the control chip U2, the other end of the resistor R13 is connected to the positive electrode of the light emitting diode of the photoelectric coupler U3, two ends of the resistor R13 are respectively connected to two ends of the light emitting diode, two ends of the capacitor C4 are respectively connected to the pin 3 and the pin 2 of the triode of the photoelectric coupler U3, the pin 2 of the triode of the photoelectric coupler U3 is grounded, the pin 3 of the triode of the photoelectric coupler U3 is connected to the pin 3 of the control chip U1, and the pin 3 of the triode of the photoelectric coupler U3 outputs the determination signal FB 1. Under the normal working state, no voltage or small voltage exists at the two ends of the light-emitting diode, so that the light-emitting diode does not emit light or the luminous illumination intensity is insufficient, the triode is disconnected, and the circuit works normally; when the circuit is in overvoltage, the light emitting diode normally emits light, the triode is conducted, the pin 3 of the triode outputs a judgment signal FB1, and after the pin 3 of the control chip U1 receives the judgment signal FB1, the control chip is disconnected with the output end of the primary side of the transformer T1A, so that the whole power adapter circuit is disconnected, and the circuit is protected.
In this embodiment, the power adapter circuit further includes a capacitor CY1, a negative electrode of the electrolytic capacitor EC2, the other end of the inductor L2, a pin 1 of the control chip U1, the other end of the resistor R5, the other end of the capacitor C5, the other end of the resistor R7 and the resistor R8 connected in parallel, and a pin 2 of a triode of the photocoupler U3 are all grounded through the capacitor CY 1.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A low power consumption power adapter including a circuit input and a circuit output interface J1, comprising:
the input end of the rectification filtering unit is connected with the circuit input end and is used for rectifying and filtering the electric signal input by the circuit input end;
the primary side of the transformer T1A is connected with the output end of the rectifying and filtering unit and is used for adjusting the voltage of the electric signal;
the input end of the secondary filtering unit is connected with the secondary side of the transformer and used for filtering the transformed electric signal, and the output end of the secondary filtering unit outputs an output voltage V+；
The input end of the first switch unit is connected with the primary side of the transformer, and the first switch unit controls the on-off of the transformer according to a judgment signal FB 1;
the input end of the photoelectric coupling unit is connected with the output end of the secondary filtering unit, the output end of the photoelectric coupling unit is connected with the first switch unit, and the photoelectric coupling unit is used for providing the judgment signal FB 1;
the control unit is connected with the output end of the secondary filtering unit, the input end of the photoelectric coupling unit and the circuit output interface J1 and is used for outputting a control signal GATEP;
and the second switch unit comprises a triode Q1 and a capacitor C10, wherein a pin 1 of the triode Q1 is connected with the control unit, a pin 2 is connected with the output end of the secondary filtering unit, a pin 3 is grounded through the capacitor C10, and the pin 3 is simultaneously connected with a pin B4 and a pin A4 of the circuit output interface J1, and the triode Q1 is controlled to be switched on and off by the control signal GATEP, so that the circuit output interface J1 is switched on and off.
2. The power adapter with low power consumption according to claim 1, wherein the control unit comprises a control chip U4, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, a capacitor C15, a resistor R16, a resistor RS1 and a resistor RS2, the pin 0 and the pin 2 of the control chip U4 are connected through the capacitor C13, the pin 2 is connected with the output end of the secondary filter unit, the pin 0 is grounded, the pin 7 is grounded through the capacitor C14, the pin 8 of the control chip U4 is connected with the pin A6 and the pin B6 of the circuit output interface J1, the pin 9 of the control chip U6 is connected with the pin A6 and the pin B6 of the circuit output interface J6, the pin 10 of the control chip U6 is connected with the pin B6 of the circuit output interface J6, the pin 11 of the control chip U6 is connected with the pin A6 of the circuit output interface J6, and the pin R3614 of the control chip U6 is connected with one end of the pin R6, the other end of the resistor R16 is connected to one end of the resistors RS1 and RS2, one end of the resistors RS1 and RS2 is also connected to the pin 0 of the circuit output interface J1, the other end of the resistors RS1 and RS2 is connected to ground, the pin 15 of the control chip U4 is connected to ground, the pin 15 of the control chip U4 is connected to one end of the resistor R16 through the capacitor C11, the pin 17 of the control chip U4 is connected to the photocoupling unit through the capacitor C12, the pin 18 of the control chip U4 is connected to the photocoupling unit through the capacitor C15, the pin 20 of the control chip U4 is connected to the photocoupling unit, the pin 4 of the control chip U4 is connected to the pin 1 of the triode Q1, and the pin 4 of the control chip U4 outputs the control signal GATEP.
3. The power adapter with low power consumption as claimed in claim 2, wherein the rectifying and filtering unit comprises a bridge rectifying circuit DB1, an inductor L1, an inductor L2, a resistor R10, an electrolytic capacitor EC1 and an electrolytic capacitor EC2, the AC input end of the bridge rectifier circuit DB1 is connected with the circuit input end, the positive electrode output end of the bridge rectifier circuit DB1 is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the anode of the electrolytic capacitor EC2 and the input end of the first switch unit, the negative electrode of the electrolytic capacitor EC2 is grounded, the resistor R10 is connected in parallel with two ends of the inductor L1, the anode of the electrolytic capacitor EC1 is connected with the anode output end of the bridge rectifier circuit DB1, the negative electrode of the electrolytic capacitor EC1 is connected with one end of the inductor L2, the other end of the inductor L2 is grounded, and one end of the inductor L2 is connected with the negative electrode output end of the bridge rectifier circuit DB 1.
4. The power adapter with low power consumption according to claim 3, wherein the first switch unit comprises a control chip U1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R7, a resistor R8, a capacitor C3, a capacitor C5, a diode D1 and a diode D2, a pin 1 of the control chip U1 is grounded, a pin 2 of the control chip U1 is sequentially connected with the resistor R2, the resistor R1 and the other end of the inductor L1, a pin 2 of the control chip U1 is further connected with a cathode of the diode D1, an anode of the diode D1 is connected with one end of the resistor R5, the other end of the resistor R5 is grounded, one end of the capacitor C5 is connected with a cathode of the diode D1, the other end of the capacitor C5 is grounded, one end of the resistor R7 and one end of the resistor R8 which are connected in parallel is connected with the pin 6854 of the control chip U1, the other end of the resistor R7 and the resistor R8 which are connected in parallel is grounded, the pin 5, the pin 6, the pin 7 and the pin 8 of the control chip U1 are simultaneously connected to the anode of the diode D2 and the output end of the primary side of the transformer, the cathode of the diode D2 is connected to one end of the resistor R4, the one end of the resistor R3 and the capacitor C3 which are connected in parallel is connected to the other end of the resistor R4, the other end of the resistor R3 and the capacitor C3 which are connected in parallel is connected to the other end of the inductor L1, and the pin 3 of the control chip U1 is used for receiving the determination signal FB 1.
5. The power adapter with low power consumption of claim 4, wherein the secondary filter unit comprises a control chip U2, a resistor R9, a capacitor C7, a capacitor C8 and an electrolytic capacitor CE4, pin 5, pin 6, pin 7 and pin 8 of control chip U2 all with the A-of the secondary side of transformer T1A is connected, pin 4 of control chip U2 is connected the A + of the secondary side of transformer T1A, and pin 4 of control chip U2 outputs output voltage V+Pin 3 of the control chip U2 is grounded through the capacitor C8, pin 2 of the control chip U2 is connected to pin 1 of the control chip U2, pin 1 of the control chip U2 is connected to the negative electrode of the electrolytic capacitor CE4, pin 4 of the control chip U2 is connected to the positive electrode of the electrolytic capacitor CE4, and pin 1 of the control chip U2 is connected to pin 5 of the control chip U2 through the capacitor C7 and the resistor R9 in sequence.
6. The power adapter with low power consumption according to claim 5, wherein the photoelectric coupling unit comprises a resistor R12, a resistor R13, a photoelectric coupler U3 and a capacitor C4, one end of the resistor R12 is connected to the pin 4 of the control chip U2, the other end of the resistor R13 is connected to the anode of the light emitting diode of the photoelectric coupler U3, two ends of the resistor R13 are respectively connected to two ends of the light emitting diode, two ends of the capacitor C4 are respectively connected to the pin 3 and the pin 2 of the triode of the photoelectric coupler U3, the pin 2 of the triode of the photoelectric coupler U3 is grounded, the pin 3 of the triode of the photoelectric coupler U3 is connected to the pin 3 of the control chip U1, and the pin 3 of the triode of the photoelectric coupler U3 outputs the determination signal FB 1.
7. The power adapter with low power consumption according to claim 6, further comprising a capacitor CY1, wherein the negative electrode of the electrolytic capacitor EC2, the other end of the inductor L2, the pin 1 of the control chip U1, the other end of the resistor R5, the other end of the capacitor C5, the other end of the resistor R7 and the resistor R8 which are connected in parallel, and the pin 2 of the triode of the photocoupler U3 are all grounded through the capacitor CY 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023152442.8U CN214315075U (en) | 2020-12-23 | 2020-12-23 | Power adapter with low power consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023152442.8U CN214315075U (en) | 2020-12-23 | 2020-12-23 | Power adapter with low power consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214315075U true CN214315075U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023152442.8U Active CN214315075U (en) | 2020-12-23 | 2020-12-23 | Power adapter with low power consumption |
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| Country | Link |
|---|---|
| CN (1) | CN214315075U (en) |
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2020
- 2020-12-23 CN CN202023152442.8U patent/CN214315075U/en active Active
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