CN215990579U - Power supply circuit - Google Patents
Power supply circuit Download PDFInfo
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- CN215990579U CN215990579U CN202022772146.1U CN202022772146U CN215990579U CN 215990579 U CN215990579 U CN 215990579U CN 202022772146 U CN202022772146 U CN 202022772146U CN 215990579 U CN215990579 U CN 215990579U
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Abstract
The utility model discloses a power supply circuit. The power supply circuit includes: the power supply module is used for providing a power supply; the switch control module is electrically connected with the power supply module; the primary inductor of the transformer is electrically connected with the switch control module; the first output module is electrically connected with the first secondary inductor of the transformer; the second output module is electrically connected with the second secondary inductor of the transformer; the switch control module is used for controlling the working state of the primary inductor. According to the embodiment of the utility model, two paths of output of the power circuit are realized through the first output module and the second output module, and the output power supply and the input power supply are in the same phase, so that the applicability of the circuit is improved, and the circuit cost is reduced.
Description
Technical Field
The utility model relates to the field of power supplies, in particular to a power supply circuit.
Background
The Buck-Boost circuit is a Buck-Boost power supply circuit, and realizes charging and discharging of an inductor and an output capacitor by controlling the on and off of a switch tube.
In the related art, the Buck-Boost circuit cannot realize multi-path output. When a plurality of output power supplies are needed, the multi-output power supply can be realized only by arranging a plurality of input power supplies, and further the circuit cost is increased.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a power circuit which can realize multi-circuit output, and the output power supply and the input power supply are in the same phase, thereby improving the applicability of the power circuit and reducing the cost of the power circuit.
According to an embodiment of the first aspect of the present invention, a power supply circuit includes: the power supply module is used for providing a power supply; the switch control module is electrically connected with the power supply module; the primary inductor of the transformer is electrically connected with the switch control module; the first output module is electrically connected with the first secondary inductor of the transformer; the second output module is electrically connected with the second secondary inductor of the transformer; the switch control module is used for controlling the working state of the primary inductor.
The power supply circuit according to the embodiment of the utility model has at least the following beneficial effects: a Buck-Boost circuit is formed by the power supply module, the switch control module, the transformer, the first output module and the second output module. The switching of the transformer between the energy storage state and the energy release state is controlled by the switch control module, so that the first output module and the second output module respectively generate an output power according to the induced voltage of the first secondary inductor and the induced voltage of the second secondary inductor, two-way output of the Buck-Boost circuit is realized, and the circuit cost of multi-way output is reduced.
According to some embodiments of the utility model, the first output module comprises: the first sub power supply is used for providing a first sub power supply; one end of the first capacitor is electrically connected with the first sub-power supply and one end of the first secondary inductor respectively, and the other end of the first capacitor is grounded; and the anode of the first diode is grounded, and the cathode of the first diode is electrically connected with the other end of the first secondary inductor.
According to some embodiments of the utility model, the second output module comprises: the second sub power supply is used for providing a second sub power supply; one end of the second capacitor is electrically connected with a second sub-power supply and one end of the second secondary inductor respectively, and the other end of the second capacitor is grounded; and the anode of the second diode is grounded, and the cathode of the second diode is electrically connected with the other end of the second secondary inductor.
According to some embodiments of the utility model, the switch control module comprises: one end of the first resistor is electrically connected with the power supply module; a collector of the first triode is electrically connected with the primary inductor, and a base of the first triode is electrically connected with the other end of the first resistor; one end of the second resistor is electrically connected with the emitting electrode of the first triode, and the other end of the second resistor is grounded; one end of the first control unit is electrically connected with the base electrode of the first triode, and the other end of the first control unit is electrically connected with the cathode of the first diode and used for controlling the conduction state of the first triode; and one end of the second control unit is electrically connected with the base electrode of the first triode, and the other end of the second control unit is electrically connected with one end of the second resistor and used for controlling the conduction state of the first triode.
According to some embodiments of the utility model, the first control unit comprises: a third capacitor, one end of which is electrically connected to the cathode of the first diode; and one end of the third resistor is electrically connected with the other end of the third capacitor, and the other end of the third resistor is electrically connected with the base electrode of the first triode.
According to some embodiments of the utility model, the second control unit comprises: a collector of the second triode is electrically connected with a base of the first triode, a base of the second triode is electrically connected with the first resistor, and an emitter of the second triode is electrically connected with the second resistor; and the base electrode of the third triode is respectively and electrically connected with the second resistor and the emitting electrode of the third triode, the emitting electrode of the third triode is grounded, and the collecting electrode of the third triode is electrically connected with the first resistor.
According to some embodiments of the utility model, further comprising: one end of the first detection module is electrically connected with the first output module, and the other end of the first detection module is electrically connected with the switch control module and is used for detecting an output signal of the first output module; and one end of the second detection module is electrically connected with the second output module, and the other end of the second detection module is electrically connected with the switch control module and is used for detecting an output signal of the second output module.
According to some embodiments of the utility model, the first detection module comprises: the negative electrode of the third diode is electrically connected with the switch control module; one end of the first voltage-stabilizing tube is electrically connected with the anode of the third diode; and one end of the fourth resistor is electrically connected with the other end of the first voltage regulator tube, and the other end of the fourth resistor is electrically connected with the first output module.
According to some embodiments of the utility model, the second detection module comprises: a negative electrode of the fourth diode is electrically connected with the switch control module; one end of the second voltage-stabilizing tube is electrically connected with the anode of the fourth diode; one end of the fifth resistor is electrically connected with the other end of the second voltage regulator tube, and the other end of the fifth resistor is electrically connected with the second output module.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The utility model is further described with reference to the following figures and examples, in which:
FIG. 1 is a block diagram of a power circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a power circuit according to an embodiment of the utility model.
Reference numerals:
the power supply module 100, the switch control module 200, the first control unit 210, the second control unit 220, the transformer 300, the first output module 400, the second output module 500, the first detection module 600, and the second detection module 700.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality is one or more, the meaning of a plurality is two or more, and the above, below, exceeding, etc. are understood as excluding the present numbers, and the above, below, within, etc. are understood as including the present numbers. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1, in some embodiments, a power supply circuit includes: the power supply module 100, the switch control module 200, the transformer 300, the first output module 400, and the second output module 500. The power module 100 is used for providing power supply; the switch control module 200 is electrically connected with the power supply module 100; the primary inductance of the transformer 300 is electrically connected to the switch control module 200, the first secondary inductance of the transformer 300 is electrically connected to the first output module 400, and the second secondary inductance of the transformer 300 is electrically connected to the second output module 500. The switch control module 200 is configured to control an operating state of the primary inductor. Specifically, when the switch control module 200 is turned on, the power module 100 provides power to the primary inductor of the transformer 300 through the switch control module 200, and the primary inductor is in an energy storage state. The first secondary inductor and the second secondary inductor respectively generate induced voltage through the primary inductor, so that the first output module 400 generates a first output power according to the induced voltage of the first secondary inductor, and the second output module 500 generates a second output power according to the induced voltage of the second secondary inductor, thereby realizing two-way output when the switch control module is switched on. When the switch control module 200 is turned off, the power supply line between the power module 100 and the primary inductor is turned off, and at this time, the primary inductor changes from the energy storage state to the energy release state. Since the primary inductor current cannot change abruptly, the voltage of the primary inductor is reversed, the primary inductor of the transformer 300 respectively induces the first secondary inductor and the second secondary inductor, and the first secondary inductor and the second secondary inductor respectively provide energy for the first output module 400 and the second output module 500, so that the first output module 400 generates a third output power according to the induced voltage of the first secondary inductor, and the second output module 500 generates a fourth output power according to the induced voltage of the second secondary inductor, thereby realizing two-way output when the switch module is turned off.
In the embodiment of the application, the power module 100, the switch control module 200, the transformer 300, the first output module 400 and the second output module 500 form a Buck-Boost circuit. The switching of the transformer 300 between the energy storage state and the energy release state is controlled by the switch control module 200, so that the first output module 400 and the second output module 500 respectively generate output power according to the induced voltage of the first secondary inductor and the induced voltage of the second secondary inductor, two-way output of the Buck-Boost circuit is realized, and the circuit cost of multi-way output is reduced.
Referring to fig. 2, in some embodiments, the first output module 400 includes: a first sub power supply, a first capacitor C1 and a first diode D1. The first sub power supply is used for providing a first sub power supply. One end of the first capacitor C1 is electrically connected to the first sub-power supply and one end of the first secondary inductor, respectively, and the other end of the first capacitor C1 is grounded. The anode of the first diode D1 is grounded, and the cathode of the first diode D1 is electrically connected to the other end of the first secondary inductor. Specifically, when the switch control module 200 is turned on, the voltage across the primary inductor of the transformer 300 is suddenly changed to the supply voltage Vin provided by the power module 100, and the primary inductor generates an induced voltage. Assuming that the first sub-power supply provides the first sub-power supply of 5V, the voltage of the cathode of the first diode D1 will be abruptly changed to VF1 ═ Vin/n1+5V, where n1 represents the winding turns ratio of the primary inductance and the first secondary inductance of the transformer 300. When the switch control module 200 is turned off, the transformer 300 performs a flyback process, that is, the current of the primary inductor is blocked, the voltage of the primary inductor reverses and starts to release energy, so that the first secondary inductor generates an induced current, the first diode D1 is turned on, thereby charging the first capacitor C1 and providing energy for the load connected with the first capacitor C1, and at this time, the output power is in phase with the power supply Vin. It is understood that the size of the first sub power supply provided by the first sub power supply can be adaptively adjusted according to the need.
In some embodiments, the second output module 500 includes: a second sub power supply, a second capacitor C2 and a second diode D2. The second sub power supply is used for providing a second sub power supply. One end of the second capacitor C2 is electrically connected to the second sub-power supply and one end of the second secondary inductor, respectively, and the other end of the second capacitor is grounded. The cathode of the second diode D2 is electrically connected to the other end of the second secondary inductor, and the anode of the second diode is grounded. Specifically, when the switch control module 200 is turned on, the voltage across the primary inductor of the transformer 300 is suddenly changed to the supply voltage Vin provided by the power module 100, and the secondary inductor generates an induced voltage. Assuming that the second sub-power supply provides 12V of second sub-power supply, the cathode voltage of the second diode D2 will be abruptly changed to VF2 ═ Vin/n2+12V, where n2 represents the winding turn ratio of the primary inductance and the second secondary inductance of the transformer 300. When the switch control module 200 is turned off, the transformer 300 performs a flyback process, that is, the current of the primary inductor is blocked, the voltage of the primary inductor reverses and starts to release energy, so that the secondary inductor generates an induced current, the second diode D2 is turned on, thereby charging the second capacitor C2 and providing energy for the load connected with the second capacitor C2, and at this time, the output power is in phase with the power supply Vin. It is understood that the size of the second sub power supply provided by the second sub power supply can be adaptively adjusted according to the need.
Referring to fig. 2, in some embodiments, the switch control module 200 includes: the circuit comprises a first resistor R1, a first triode Q1, a second resistor R2, a first control unit 210 and a second control unit 220. One end of the first resistor R1 is electrically connected to the power module 100. The collector of the first transistor Q1 is electrically connected with the primary inductor, and the base of the first transistor Q1 is electrically connected with the other end of the first resistor R1. One end of the second resistor R2 is electrically connected to the emitter of the first transistor Q1, and the other end of the second resistor R2 is grounded. One end of the first control unit 210 is electrically connected to the base of the first transistor Q1, the other end of the first control unit 210 is electrically connected to the cathode of the first diode D1, and the first control unit 210 is configured to control the on state of the first transistor Q1. One end of the second control unit 220 is electrically connected to the base of the first transistor Q1, and the other end of the second control unit 220 is electrically connected to one end of the second resistor R2, for controlling the on-state of the first transistor Q1.
Specifically, the first transistor Q1 is an NPN transistor. When the power module 100 provides the power Vin, a current flows through the first resistor R1, the first transistor Q1 and the second resistor R2, at this time, the first transistor Q1 is turned on, the collector of the first transistor Q1 is pulled down, and the first secondary coil and the second secondary coil respectively generate induced voltages according to the sudden change voltage generated at the two ends of the primary coil, so that the first diode D1 and the second diode D2 respectively generate voltages VF1 and VF 2. It can be understood that, during the conduction of the first triode Q1, the induced voltage VF1 of the first secondary inductor and the induced voltage VF2 of the second secondary inductor are both greater than 0V, so that neither the first diode D1 nor the second diode D2 is conductive, and the first capacitor C1 and the second capacitor C2 are not charged. During the conduction of the first transistor Q1, the first control unit 210 provides a base bias current to the first transistor Q1 to maintain the conduction state of the first transistor Q1. The power supply Vin charges the primary inductor, the current of the primary inductor continuously rises, and when the voltage of the collecting resistor and the second resistor R2 reaches 0.6V, the second control unit 220 pulls down the base voltage of the first triode Q1 to control the first triode Q1 to be turned off. When the first triode Q1 is turned off, the primary inductor starts to discharge energy and generate a reverse voltage, and the first secondary inductor and the second secondary inductor respectively generate a flyback process, so as to respectively charge the first capacitor C1 and the second capacitor C2. During the flyback process, the cathode voltage VF1 of the first transistor Q1 is clamped to-0.6V, and the first control unit 210 controls the first transistor Q1 to maintain the off state. It can be understood that when the first transistor Q1 is turned off, the induced current generated by the first secondary inductor flows from the first diode D1 to the first capacitor C1, and the induced current generated by the second secondary inductor flows from the second diode D2 to the second capacitor C2, so that the output power of the first capacitor C1 and the second capacitor C2 is in phase with the power supply Vin.
In some embodiments, the first control unit 210 includes: a third capacitor C3 and a third resistor R3. One end of the third capacitor C3 is electrically connected to the cathode of the first diode D1; one end of the third resistor R3 is electrically connected to the other end of the third capacitor C3, and the other end of the third resistor R3 is electrically connected to the base of the first transistor Q1. When the first transistor Q1 is turned on, the negative voltage VF1 of the first diode D1 charges the third capacitor C3, and the voltage across the third capacitor C3 does not change abruptly, so the potential at the point a of the third capacitor C3 continuously drops. The charging current generated by the third capacitor C3 provides a base bias current for the first transistor Q1 to maintain the first transistor Q1 in a conductive state. When the first transistor Q1 is turned off, in the flyback process of the first secondary inductor and the second secondary inductor, the voltage at the two ends of the third capacitor C3 does not suddenly change, so that the potential at the point a suddenly drops, and a discharging process is generated in which the voltage sequentially flows through the second resistor R2, the second control unit 220, the third resistor R3, and the third capacitor C3. The base voltage of the first transistor Q1 is pulled down to-0.7V to maintain the off state of the first transistor Q1. It is understood that the second output module 500 also has the same connection structure (not shown), and the connection relationship and implementation principle are the same as those described above, and will not be described herein again.
In some embodiments, the second control unit 220 includes: a second transistor Q2 and a third transistor Q3. The collector of the second triode Q2 is electrically connected with the base of the first triode Q1, the base of the second triode Q2 is electrically connected with the first resistor R1, and the emitter of the second triode Q2 is electrically connected with the second resistor R2. The base electrode of the third triode Q3 is respectively and electrically connected with the emitter electrodes of the second resistor R2 and the second triode Q2, the emitter electrode of the third triode Q3 is grounded, and the collector electrode of the third triode Q3 is electrically connected with the first resistor R1. Specifically, the second transistor Q2 and the third transistor Q3 are both NPN transistors. When the first transistor Q1 is turned on, when the voltage of the sampling resistor R2 is 0.6V, the second transistor Q2 and the third transistor Q3 are turned on to pull down the voltage at the base of the first transistor Q1, so that the first transistor Q1 is turned off. In the flyback process of the first secondary inductor and the second secondary inductor, due to the sudden drop of the potential at the point a, a discharging process is generated, wherein the discharging process sequentially flows through the second resistor R2, the second triode Q2, the first triode Q1, the third resistor R3 and the third capacitor C3.
Referring to fig. 2, in some embodiments, the power supply circuit further comprises: a first detection module 600 and a second detection module 700. One end of the first detection module 600 is electrically connected to the first output module 400, the other end of the first detection module 600 is electrically connected to the switch control module 200, and the first detection module 600 is configured to detect an output signal of the first output module 400. One end of the second detection module 700 is electrically connected to the second output module 500, the other end of the second detection module 700 is electrically connected to the switch control module 200, and the second detection module 700 is configured to detect an output signal of the second output module 500. Specifically, with the first transistor Q1 turned on and off, the output power of the first capacitor C1 and the second capacitor C2 will gradually increase. When the first detection module 600 and/or the second detection module 700 detect that the output voltage of the first capacitor C1 and/or the second capacitor C2 exceeds the preset threshold, the first detection module 600 and/or the second detection module 700 will forcibly turn off the first transistor Q1, and terminate the switching process of the first transistor Q1, so as to ensure the stability of the output power.
In some embodiments, the first detection module 600 includes: a third diode D3, a first voltage regulator ZD1 and a fourth resistor R4. The cathode of the third diode D3 is electrically connected to the switch control module 200; one end of the first voltage regulator tube ZD1 is electrically connected to the anode of the third diode D3; one end of the fourth resistor R4 is electrically connected to the other end of the first zener diode ZD1, and the other end of the fourth resistor R4 is electrically connected to the first output module 400. Specifically, the third diode D3, the first zener diode ZD1, and the fourth resistor R4 are connected in series in this order. The cathode of the third diode D3 is electrically connected to the base of the third transistor Q3 and the emitter of the second transistor Q2, respectively, and the other end of the fourth resistor R4 is electrically connected to the first sub-power supply. When the first detection module 600 detects that the output voltage of the first output module 400 exceeds the preset threshold, the first transistor Q1 is forced to be turned off to ensure the stability of the output power of the first output module 400.
In some embodiments, the second detection module 700 includes: a fourth diode D4, a second regulator ZD2 and a fifth resistor R5. The cathode of the fourth diode D4 is electrically connected to the switch control module 200; one end of the second voltage regulator ZD2 is electrically connected to the anode of the fourth diode D4; one end of the fifth resistor R5 is electrically connected to the other end of the second zener diode ZD2, and the other end of the fifth resistor R5 is electrically connected to the second output module 500. Specifically, the fourth diode D4, the second voltage regulator ZD2, and the fifth resistor R5 are connected in series in this order. The cathode of the fourth diode D4 is electrically connected to the base of the third transistor Q3 and the emitter of the second transistor Q2, respectively, and the other end of the fifth resistor R5 is electrically connected to the second sub-power supply. When the second detection module 700 detects that the output voltage of the second output module 500 exceeds the preset threshold, the first transistor Q1 is forced to be turned off to ensure the stability of the output power of the second output module 500.
In a specific embodiment, the connection relationship among the components of the switch control module 200, the first output module 400 and the second output module 500 is shown in fig. 2. When the power module 100 provides the power Vin, a current flows through the first resistor R1, the first transistor Q1 and the second resistor R2, so that the first transistor Q1 is turned on, and the collector voltage of the first transistor Q1 is pulled low. At this time, the primary inductor of the transformer 300 is in an energy storage state, the voltage across the primary inductor is suddenly changed to the supply voltage Vin, and the primary inductor and the secondary inductor respectively generate induced voltages, so that the cathode voltage of the first diode D1 is suddenly changed to VF1, and the cathode voltage of the second diode D2 is suddenly changed to VF 2. The voltage VF1 charges the third capacitor C3, the potential at the point a of the third capacitor C3 will continuously decrease, and the charging current generated by the third capacitor C3 provides the base bias current for the first transistor Q1 to maintain the on state of the first transistor Q1. When the first transistor Q1 is turned on, the power supply Vin continuously charges the primary inductor, and the current of the primary inductor continuously rises. When the voltage of the sampling resistor and the second resistor R2 reaches 0.6V, the second triode Q2 and the third triode Q3 are conducted, the base voltage of the first triode Q1 is pulled down, and the first triode Q1 is rapidly closed. When the first transistor Q1 is turned off, the primary inductor is switched to a de-energized state, the first secondary inductor and the second secondary inductor generate induced currents, and the induced currents flow through the first diode D1 and the second diode D2 respectively to charge the first capacitor C1 and the second capacitor C2 respectively, so as to realize a flyback process of the transformer 300. During flyback, the cathode voltage of the first diode D1 is clamped to-0.6V. Since the voltage across the third capacitor C3 does not suddenly change, the potential at the point a will suddenly drop, thereby generating a discharging process that sequentially flows through the second resistor R2, the sixth resistor R6, the second transistor Q2, the first transistor Q1, the third resistor R3, and the third capacitor C3. The base voltage of the first transistor Q1 is pulled down to-0.7V to maintain the off state of the first transistor Q1. During the turn-off of the first transistor Q1, the first diode D1 and the second diode D2 are both turned on, so that the output power of the first output module 400 is in phase with the power Vin. It is understood that the implementation process of the second output module 500 for outputting power is the same as that described above, and is not described herein again.
The power supply circuit provided by the embodiment of the application realizes two-way output of the circuit through the transformer, the first output module and the second output module, and the output power supply and the power supply are in the same phase, so that the cost of the multi-way output circuit is reduced, and the applicability of the power supply circuit is improved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A power supply circuit, comprising:
the power supply module is used for providing a power supply;
the switch control module is electrically connected with the power supply module;
the primary inductor of the transformer is electrically connected with the switch control module;
the first output module is electrically connected with the first secondary inductor of the transformer;
the second output module is electrically connected with the second secondary inductor of the transformer;
the switch control module is used for controlling the primary inductor to switch between an energy storage state and an energy release state, so that the first output module generates a first output power supply in the energy storage state, the second output module generates a second output power supply in the energy storage state, the first output module generates a third output power supply in the energy release state, and the second output module generates a fourth output power supply in the energy release state.
2. The power supply circuit of claim 1, wherein the first output module comprises:
the first sub power supply is used for providing a first sub power supply;
one end of the first capacitor is electrically connected with the first sub-power supply and one end of the first secondary inductor respectively, and the other end of the first capacitor is grounded;
and the anode of the first diode is grounded, and the cathode of the first diode is electrically connected with the other end of the first secondary inductor.
3. The power supply circuit of claim 2, wherein the second output module comprises:
the second sub power supply is used for providing a second sub power supply;
one end of the second capacitor is electrically connected with a second sub-power supply and one end of the second secondary inductor respectively, and the other end of the second capacitor is grounded;
and the anode of the second diode is grounded, and the cathode of the second diode is electrically connected with the other end of the second secondary inductor.
4. The power supply circuit of claim 3, wherein the switch control module comprises:
one end of the first resistor is electrically connected with the power supply module;
a collector of the first triode is electrically connected with the primary inductor, and a base of the first triode is electrically connected with the other end of the first resistor;
one end of the second resistor is electrically connected with the emitting electrode of the first triode, and the other end of the second resistor is grounded;
one end of the first control unit is electrically connected with the base electrode of the first triode, and the other end of the first control unit is electrically connected with the cathode of the first diode and used for controlling the conduction state of the first triode;
and one end of the second control unit is electrically connected with the base electrode of the first triode, and the other end of the second control unit is electrically connected with one end of the second resistor and used for controlling the conduction state of the first triode.
5. The power supply circuit according to claim 4, wherein the first control unit includes:
a third capacitor, one end of which is electrically connected to the cathode of the first diode;
and one end of the third resistor is electrically connected with the other end of the third capacitor, and the other end of the third resistor is electrically connected with the base electrode of the first triode.
6. The power supply circuit according to claim 4, wherein the second control unit includes:
a collector of the second triode is electrically connected with a base of the first triode, a base of the second triode is electrically connected with the first resistor, and an emitter of the second triode is electrically connected with the second resistor;
and the base electrode of the third triode is respectively and electrically connected with the second resistor and the emitting electrode of the third triode, the emitting electrode of the third triode is grounded, and the collecting electrode of the third triode is electrically connected with the first resistor.
7. The power supply circuit according to any one of claims 1 to 6, further comprising:
one end of the first detection module is electrically connected with the first output module, and the other end of the first detection module is electrically connected with the switch control module and is used for detecting an output signal of the first output module;
and one end of the second detection module is electrically connected with the second output module, and the other end of the second detection module is electrically connected with the switch control module and is used for detecting an output signal of the second output module.
8. The power supply circuit of claim 7, wherein the first detection module comprises:
the negative electrode of the third diode is electrically connected with the switch control module;
one end of the first voltage-stabilizing tube is electrically connected with the anode of the third diode;
and one end of the fourth resistor is electrically connected with the other end of the first voltage regulator tube, and the other end of the fourth resistor is electrically connected with the first output module.
9. The power supply circuit of claim 7, wherein the second detection module comprises:
a negative electrode of the fourth diode is electrically connected with the switch control module;
one end of the second voltage-stabilizing tube is electrically connected with the anode of the fourth diode;
one end of the fifth resistor is electrically connected with the other end of the second voltage regulator tube, and the other end of the fifth resistor is electrically connected with the second output module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022772146.1U CN215990579U (en) | 2020-11-25 | 2020-11-25 | Power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022772146.1U CN215990579U (en) | 2020-11-25 | 2020-11-25 | Power supply circuit |
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| CN215990579U true CN215990579U (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022772146.1U Active CN215990579U (en) | 2020-11-25 | 2020-11-25 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215990579U (en) |
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2020
- 2020-11-25 CN CN202022772146.1U patent/CN215990579U/en active Active
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