CN215897607U - Rectifier bridge of switching power supply - Google Patents
Rectifier bridge of switching power supply Download PDFInfo
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- CN215897607U CN215897607U CN202122107075.8U CN202122107075U CN215897607U CN 215897607 U CN215897607 U CN 215897607U CN 202122107075 U CN202122107075 U CN 202122107075U CN 215897607 U CN215897607 U CN 215897607U
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Abstract
The utility model discloses a rectifier bridge of a switching power supply, which comprises a switching power supply U1, wherein a voltage stabilizing circuit is electrically connected with the switching power supply U1, the voltage stabilizing circuit is electrically connected with the rectifier bridge, and the switching power supply U1 is also electrically connected with a current regulating and controlling circuit. The voltage stabilizing circuit arranged on the rectifier bridge of the switching power supply is used for stabilizing a power supply circuit of the switching power supply U1, can be used for adjusting circuit current in cooperation with a current adjusting and controlling circuit, and can be used for rectification in cooperation with the rectifier bridge; the voltage stabilizing circuit utilizes the characteristic that the reverse voltage does not change along with the reverse current within a certain reverse current range after the voltage stabilizing diode ZD1 is subjected to reverse breakdown, and is used for stabilizing the voltage of the voltage stabilizing circuit, further stabilizing the output voltage of the switching power supply U1, maintaining the stability of the operation of circuit accessories, and the capacitor can be used for a blocking circuit, a coupling circuit, a bypass circuit or a filter circuit; through the cooperation of the capacitor C1 and the resistor R1, the peak voltage is absorbed, interference is reduced, and a signal with high signal-to-noise ratio is provided for the next stage.
Description
Technical Field
The utility model relates to the technical field of switching power supplies, in particular to a rectifier bridge of a switching power supply.
Background
The switching power supply is a power supply which utilizes modern power electronic technology to control the on-off time ratio of a switching tube and maintain stable output voltage, and generally consists of a Pulse Width Modulation (PWM) control IC and a MOSFET. With the development and innovation of power electronic technology, the technology of the switching power supply is continuously innovated. At present, the switching power supply is widely applied to almost all electronic devices with the characteristics of small size, light weight and high efficiency, and is an indispensable power supply mode for the rapid development of the electronic information industry at present.
The current switching power supply is poor in temperature detection sensitivity in the using process, is not convenient for providing stable power supply voltage for the switching power supply, and is poor in rectification effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a rectifier bridge of a switching power supply, which aims to solve the problems that the conventional switching power supply has poor sensitivity in detecting the temperature of the switching power supply, is not convenient to provide stable power supply voltage for the switching power supply and has poor rectification effect in the use process in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a rectifier bridge of a switching power supply comprises a switching power supply U1, wherein a voltage stabilizing circuit is electrically connected with the switching power supply U1, the voltage stabilizing circuit is electrically connected with the rectifier bridge, and the switching power supply U1 is further electrically connected with a current regulating and controlling circuit.
Preferably, the current regulation and control circuit comprises a thermistor NTC and a resistor R2, the over-temperature protection pin OTP of the switching power supply U1 is electrically connected with the thermistor NTC through a wire, the output end of the thermistor NTC is electrically connected with the resistor R2, one end of the wire led out from the resistor R2 is grounded, and the other end of the wire is connected to the voltage stabilizing circuit.
Preferably, the voltage stabilizing circuit comprises a zener diode ZD1, a capacitor C1 and a resistor R1, a power supply voltage pin VCC of the switching power supply U1 is connected with the zener diode ZD1 through a wire, wires led out from the zener diode ZD1 are respectively connected with the capacitor C1 and the switch S1, and a wire led out from the capacitor C1 is electrically connected with the resistor R1.
Preferably, the capacitor C1 is electrically connected in series with the resistor R1 and in parallel with the switching power supply U1.
Preferably, the rectifier bridge comprises a diode D1, a diode D2, a diode D3, a diode D4 and a load resistor RL, the diode D1, the diode D2, the diode D3 and the diode D4 are connected in a closed loop in series through wires, a lead between the diode D1 and the diode D2 is electrically connected with the load resistor RL, and a wire led out from the load resistor RL is connected between the diode D3 and the diode D4.
Preferably, the ground pin GND of the switching power supply U1 is electrically connected with a fuse FU through a wire, and the wire led out from the fuse FU is connected between the diode D1 and the diode D3 of the rectifier bridge.
Compared with the prior art, the utility model has the following beneficial effects:
the voltage stabilizing circuit is used for stabilizing a power supply circuit of the switching power supply U1, can be used for adjusting circuit current by matching with a current adjusting and controlling circuit, and can be used for rectifying by matching with a rectifier bridge;
the thermistor NTC of the current regulation and control circuit is high in sensitivity, can be used for detecting temperature transformation, is good in stability and strong in overload capacity, and can be used for temperature control and temperature compensation by matching with the resistor R2;
the voltage stabilizing circuit provided by the utility model utilizes the characteristic that after the voltage stabilizing diode ZD1 is reversely broken down, the reverse voltage does not change along with the reverse current within a certain reverse current range to stabilize the voltage of the voltage stabilizing circuit, further stabilize the output voltage of the switching power supply U1 and maintain the stability of the operation of circuit accessories, and the capacitor can be used for a blocking circuit, a coupling circuit, a bypass circuit or a filter circuit; the capacitor C1 and the resistor R1 are matched to absorb peak voltage, so that interference is reduced, and a signal with high signal-to-noise ratio is provided for the next stage;
the rectifier bridge is used for converting alternating current into direct current, and can be used for finishing rectification work through the one-way conduction principle of the diode D1, the diode D2, the diode D3 and the diode D4; when the current exceeds a prescribed value, fuse FU is internally blown for protecting the circuit.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the figure: 1. a current regulation circuit; 2. a voltage stabilizing circuit; FU3, fuse; 4. a rectifier bridge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the present embodiment provides a rectifier bridge of a switching power supply, including a switching power supply U1, a ground pin GND of the switching power supply U1 is electrically connected to a fuse FU3 through a wire, the wire led out from the fuse FU3 is connected between a diode D1 and a diode D3 of the rectifier bridge 4, when a current exceeds a specified value, the fuse FU3 is internally fused for protecting a circuit, the switching power supply U1 is electrically connected to a regulator circuit 2, the regulator circuit 2 includes a zener diode ZD1, a capacitor C1 and a resistor R1, the capacitor C1 is electrically connected in series with the resistor R1 and electrically connected in parallel with the switching power supply U1, the capacitor C1 and the resistor R1 are used to absorb a peak voltage and reduce interference and provide a signal with a high signal-to-noise ratio for a next stage, a supply voltage pin VCC of the switching power supply U1 is connected to the zener diode ZD1 through a wire, the wire led out from the zener diode ZD1 is connected to a capacitor C1 and a switch S1, a lead led out by the capacitor C1 is electrically connected with a resistor R1, the voltage stabilizing circuit 2 utilizes the characteristic that a voltage stabilizing diode ZD1 is reverse breakdown and then reverse voltage does not change along with reverse current within a certain reverse current range to stabilize the voltage of the voltage stabilizing circuit 2, further stabilize the output voltage of the switching power supply U1 and maintain the stability of the operation of circuit accessories, the capacitor can be used for a dc blocking, coupling, bypass or filter circuit, the voltage stabilizing circuit 2 is electrically connected with a rectifier bridge 4, the rectifier bridge 4 comprises a diode D1, a diode D2, a diode D3, a diode D4 and a load resistor RL, the diode D1, the diode D2, the diode D3 and the diode D4 are connected in series and closed loop through a lead wire, a lead wire between the diode D1 and the diode D2 is electrically connected with the load resistor RL, a lead led out by the load resistor RL is connected between the diode D3 and the diode D4, the rectifier bridge 4 is used for converting alternating current into direct current, the rectifier circuit can be used for finishing rectification work through the one-way conduction principle of the diode D1, the diode D2, the diode D3 and the diode D4, the switching power supply U1 is further electrically connected with a current regulating and controlling circuit 1, the voltage stabilizing circuit 2 is used for stabilizing a power supply circuit of the switching power supply U1, the current regulating and controlling circuit 1 can be used for regulating circuit current, and the rectifier circuit 4 can be used for rectification.
Example two
The scheme in the first embodiment is further described in the following with reference to specific working modes, which are described in detail in the following:
as shown in fig. 1, as a preferred embodiment, based on the above manner, further, the current regulation and control circuit 1 includes a thermistor NTC and a resistor R2, the over-temperature protection pin OTP of the switching power supply U1 is electrically connected to the thermistor NTC through a wire, an output terminal of the thermistor NTC is electrically connected to the resistor R2, one end of the wire led out from the resistor R2 is grounded, and the other end is connected to the voltage stabilizing circuit 2, the thermistor NTC of the current regulation and control circuit 1 has high sensitivity, can be used for detecting temperature change, and has good stability and strong overload capability, and the matched resistor R2 can be used for temperature control and temperature compensation.
The working principle of the rectifier bridge of the switching power supply is as follows: firstly, the voltage stabilizing circuit 2 utilizes the characteristic that after the voltage stabilizing diode ZD1 is reversely broken down, the reverse voltage does not change along with the reverse current within a certain reverse current range for stabilizing the voltage of the voltage stabilizing circuit 2 and further stabilizing the output voltage of the switching power supply U1, and then the thermistor NTC of the current regulating and controlling circuit 1 has higher sensitivity, can be used for detecting temperature change, has good stability and strong overload capacity, and can be used for temperature control and temperature compensation by matching with the resistor R2; then, the rectifier bridge 4 is used for converting the alternating current into the direct current, and can be used for completing the rectification work through the one-way conduction principle of the diode D1, the diode D2, the diode D3 and the diode D4.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A rectifier bridge of a switching power supply comprises a switching power supply U1, and is characterized in that: the switching power supply U1 is electrically connected with a voltage stabilizing circuit (2), the voltage stabilizing circuit (2) is electrically connected with a rectifier bridge (4), and the switching power supply U1 is also electrically connected with a current regulating and controlling circuit (1).
2. A rectifier bridge of a switching power supply according to claim 1, wherein: the current regulation and control circuit (1) comprises a thermistor NTC and a resistor R2, an over-temperature protection pin OTP of the switch power supply U1 is electrically connected with the thermistor NTC through a wire, the output end of the thermistor NTC is electrically connected with the resistor R2, one end of the wire led out by the resistor R2 is grounded, and the other end of the wire is connected into the voltage stabilizing circuit (2).
3. A rectifier bridge of a switching power supply according to claim 1, wherein: the voltage stabilizing circuit (2) comprises a voltage stabilizing diode ZD1, a capacitor C1 and a resistor R1, a power supply voltage pin VCC of the switch power supply U1 is connected with the voltage stabilizing diode ZD1 through a lead, the lead led out by the voltage stabilizing diode ZD1 is respectively connected with the capacitor C1 and a switch S1, and the lead led out by the capacitor C1 is electrically connected with the resistor R1.
4. A rectifier bridge of a switching power supply according to claim 3, wherein: the capacitor C1 is electrically connected in series with the resistor R1 and in parallel with the switching power supply U1.
5. A rectifier bridge of a switching power supply according to claim 1, wherein: the rectifier bridge (4) comprises a diode D1, a diode D2, a diode D3, a diode D4 and a load resistor RL, wherein the diode D1, the diode D2, the diode D3 and the diode D4 are connected in a closed loop in series through wires, a lead between the diode D1 and the diode D2 is electrically connected with the load resistor RL, and a wire led out from the load resistor RL is connected between the diode D3 and the diode D4.
6. The rectifier bridge of the switching power supply according to claim 5, wherein: and a grounding pin GND of the switching power supply U1 is electrically connected with a fuse FU (3) through a wire, and the wire led out from the fuse FU (3) is connected between a diode D1 and a diode D3 of the rectifier bridge (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122107075.8U CN215897607U (en) | 2021-09-02 | 2021-09-02 | Rectifier bridge of switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122107075.8U CN215897607U (en) | 2021-09-02 | 2021-09-02 | Rectifier bridge of switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215897607U true CN215897607U (en) | 2022-02-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122107075.8U Active CN215897607U (en) | 2021-09-02 | 2021-09-02 | Rectifier bridge of switching power supply |
Country Status (1)
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|---|---|
| CN (1) | CN215897607U (en) |
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2021
- 2021-09-02 CN CN202122107075.8U patent/CN215897607U/en active Active
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