CN209748409U - Power supply conversion circuit capable of outputting stable voltage - Google Patents
Power supply conversion circuit capable of outputting stable voltage Download PDFInfo
- Publication number
- CN209748409U CN209748409U CN201920455574.6U CN201920455574U CN209748409U CN 209748409 U CN209748409 U CN 209748409U CN 201920455574 U CN201920455574 U CN 201920455574U CN 209748409 U CN209748409 U CN 209748409U
- Authority
- CN
- China
- Prior art keywords
- circuit
- electronic switch
- output
- power supply
- channel mos
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000006243 chemical reaction Methods 0.000 title claims description 13
- 239000003990 capacitor Substances 0.000 claims description 39
- 238000001914 filtration Methods 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Abstract
A power switching circuit capable of outputting stable voltage comprises a power supply, a forward driving electronic switch and a reverse driving electronic switch, and further comprises: the power supply comprises at least two N-channel MOSFET tubes, namely a first N-channel MOS tube and a second N-channel MOS tube, wherein the cathode of the auxiliary power supply is connected with the cathode of the power supply to form a common ground end, and the grids of the first N-channel MOS tube and the second N-channel MOS tube are connected in parallel. The utility model can prevent the short circuit of the battery caused by reverse connection under the condition that the power circuit is damaged; the volume can be reduced, and the service life is prolonged; because the N-channel MOSFET has smaller conduction loss than the P-channel MOSFET, the heat productivity can be reduced, and the system efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of power supply circuit, concretely relates to exportable stabilized voltage's power conversion circuit.
Background
The single chip microcomputer is the most common control chip in the electronic industry, has the advantages of small volume, strong control function, low power consumption, strong environment adaptability, flexible expansion, convenient use and the like, and can form application control systems such as a control system, a data acquisition system, a communication system, a signal detection system, a wireless sensing system, a measurement and control system, a robot and the like in various forms. Because the singlechip is widely used, the design quality of the power supply module directly determines whether the hardware design of the whole system is stable, and because different devices are used in the hardware design, the power supply voltages of the devices are different, so that different stable voltage values can be obtained through input voltage during design.
Therefore, a power conversion circuit capable of outputting a stable voltage is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an exportable steady voltage's power conversion circuit, power supply circuit produce the steady voltage value that 12V, 5V, 3.3V were used commonly, satisfy the inside components and parts design of system and use required voltage, the required power supply of the most external equipment of system simultaneously, the commonality is strong. The circuit is simple and practical, the stability is good, and the fault rate is reduced. Low cost, easy maintenance and wide market application.
In order to achieve the above object, the utility model adopts the following technical scheme:
A power switching circuit capable of outputting stable voltage comprises a power supply, a forward driving electronic switch and a reverse driving electronic switch, and further comprises: at least two N-channel MOSFET tubes, namely a first N-channel MOS tube and a second N-channel MOS tube, wherein the cathode of an auxiliary power supply is connected with the cathode of the power supply to form a common ground end, the grids of the first N-channel MOS tube and the second N-channel MOS tube are connected in parallel, the source electrode of the first N-channel MOS tube is connected with the anode of the power supply, the drain electrode of the first N-channel MOS tube is connected with the drain electrode of the second N-channel MOS tube, the source electrode of the second N-channel MOS tube is used as the output end of the power supply, the control end of the forward driving electronic switch is used as the control end of an output control circuit of the power supply, the grounding end of the forward driving electronic switch is connected with the common ground end, the output end of the forward driving electronic switch is connected with the control end of a reverse driving electronic switch through a fifth resistor, the output end of the forward driving electronic switch is also connected with the anode of the auxiliary power supply through a fourth resistor, and the power supply end, the output end of the reverse drive electronic switch is connected with the grid electrodes of the first N-channel MOS tube and the second N-channel MOS tube through a second resistor, the output end of the reverse drive electronic switch is connected with the source electrode of the first N-channel MOS tube through the first resistor, and the output end of the reverse drive electronic switch is connected with the source electrode of the second N-channel MOS tube through a third resistor; the circuit comprises an input voltage to 12V circuit, a 12V to 5V circuit and a 5V to 3.3V circuit, wherein the input voltage to 12V circuit, the 12V to 5V circuit and the 5V to 3.3V circuit are sequentially connected, the output of the input voltage to 12V circuit is the input of the 12V to 5V circuit, and the output of the 12V to 5V circuit is the input of the 5V to 3.3V circuit; the input voltage is converted into a 12V circuit, the output + end is connected with a capacitor C26, a capacitor C29 and VIN of a chip U1, the chip output end OUT is connected with a diode D1, an inductor L1, a capacitor C27, a capacitor C28 and a TVS tube, the circuit is used for filtering and protecting the circuit, and meanwhile, the output voltage stabilization amplitude is ensured to be 12V; the circuit is characterized by comprising a circuit from 12V to 5V, wherein the input voltage is connected with a capacitor C31, a capacitor C36 and VIN of a chip U2, the output end OUT of the chip is connected with a diode D2, an inductor L2, a capacitor C78, a capacitor C32 and a capacitor C33, the circuit is used for filtering and protecting the circuit, and meanwhile, the output voltage stabilization amplitude is ensured to be 5V; the circuit for converting 5V into 3.3V has the advantages that input voltage is connected with VIN of a capacitor C34, a capacitor C30 and a chip U3, two OUT output ends of the chip are connected, the capacitor C37, the capacitor C35 and a TVS tube are connected, a voltage-stabilizing amplitude is output at the same time, and meanwhile, the output end is connected with a light-emitting diode and a resistor R32 to indicate whether a power supply circuit works normally.
Furthermore, the positive pole of the power supply input of the input voltage of the circuit for converting the input voltage into 12V is an output + end, and the negative pole is an output-end.
Furthermore, the output of the circuit for converting the input voltage into 12V is divided into two paths, one path supplies power to the system, namely supplies power to the circuit for converting 12V into 5V, and the other path supplies power to the peripheral.
Furthermore, the output of the circuit for converting 12V into 5V is divided into two paths, one path supplies power to the circuit for converting 5V into 3.3V, the other path supplies power to the GPRS/3G module, and the MOS tube is adopted to control the on-off state of the GPRS/3G module.
Further, the specific structure of the forward driving electronic switch comprises: and the base electrode of the first NPN type triode is the control end of the forward driving electronic switch, the emitter electrode of the first NPN type triode is the grounding end of the forward driving electronic switch, and the collector electrode of the first NPN type triode is the output end of the forward driving electronic switch.
further, the specific structure of the reverse driving electronic switch comprises: the base electrode of the second PNP type triode is the control end of the reverse driving electronic switch, the emitting electrode of the second PNP type triode is the power supply end of the reverse driving electronic switch, and the collector electrode of the second PNP type triode is the output end of the reverse driving electronic switch.
The utility model has the beneficial technical effects that: (1) the battery short circuit caused by reverse connection can be prevented under the condition that the power supply circuit is damaged; the volume can be reduced, and the service life is prolonged; because the N-channel MOSFET has smaller conduction loss than the P-channel MOSFET, the heat productivity can be reduced, and the system efficiency is improved.
(2) The power supply circuit generates a voltage stabilizing value which is commonly used by 12V, 5V and 3.3V, the voltage required by the design and use of internal components of the system is met, meanwhile, the power supply required by most of system external equipment of the system is strong in universality. The circuit is simple and practical, the stability is good, and the fault rate is reduced. Low cost, easy maintenance and wide market application.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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.
As shown in fig. 1, a power conversion circuit capable of outputting a stable voltage includes a power supply, a forward driving electronic switch and a reverse driving electronic switch, and further includes at least two N-channel MOSFET transistors, i.e. a first N-channel MOS transistor and a second N-channel MOS transistor, a negative electrode of an auxiliary power supply is connected to a negative electrode of the power supply to form a common ground terminal, gates of the first N-channel MOS transistor and the second N-channel MOS transistor are connected in parallel, a source of the first N-channel MOS transistor is connected to a positive electrode of the power supply, a drain of the first N-channel MOS transistor is connected to a drain of the second N-channel MOS transistor, a source of the second N-channel MOS transistor is used as an output terminal of the power supply, a control terminal of the forward driving electronic switch is used as a control terminal of an output control circuit of the power supply, a ground terminal of the forward driving electronic switch is connected to the common ground terminal, and an output terminal of the forward driving electronic switch is connected to a control terminal of the reverse, the output end of the forward driving electronic switch is also connected to the anode of the auxiliary power supply through a fourth resistor, the power supply end of the reverse driving electronic switch is connected with the anode of the auxiliary power supply, the output end of the reverse driving electronic switch is connected with the grids of the first N-channel MOS tube and the second N-channel MOS tube through a second resistor, the output end of the reverse driving electronic switch is connected with the source electrode of the first N-channel MOS tube through the first resistor, and the output end of the reverse driving electronic switch is connected with the source electrode of the second N-channel MOS tube through a third resistor; the advantages of such a connection are: the short circuit of the battery caused by reverse connection can be prevented under the condition that the power supply circuit is damaged; the volume can be reduced, and the service life is prolonged; because the conduction loss of the N-channel MOSFET is smaller than that of the P-channel MOSFET, the heat productivity can be reduced, and the efficiency of the whole system is improved.
The circuit comprises an input voltage to 12V circuit, a 12V to 5V circuit and a 5V to 3.3V circuit, wherein the input voltage to 12V circuit, the 12V to 5V circuit and the 5V to 3.3V circuit are sequentially connected, the output of the input voltage to 12V circuit is the input of the 12V to 5V circuit, and the output of the 12V to 5V circuit is the input of the 5V to 3.3V circuit; the input voltage is converted into a 12V circuit, the output + end is connected with a capacitor C26, a capacitor C29 and VIN of a chip U1, the chip output end OUT is connected with a diode D1, an inductor L1, a capacitor C27, a capacitor C28 and a TVS tube, the circuit is used for filtering and protecting the circuit, and meanwhile, the output voltage stabilization amplitude is ensured to be 12V; the circuit is characterized by comprising a circuit from 12V to 5V, wherein the input voltage is connected with a capacitor C31, a capacitor C36 and VIN of a chip U2, the output end OUT of the chip is connected with a diode D2, an inductor L2, a capacitor C78, a capacitor C32 and a capacitor C33, the circuit is used for filtering and protecting the circuit, and meanwhile, the output voltage stabilization amplitude is ensured to be 5V; the circuit for converting 5V into 3.3V has the advantages that input voltage is connected with VIN of a capacitor C34, a capacitor C30 and a chip U3, two OUT output ends of the chip are connected, the capacitor C37, the capacitor C35 and a TVS tube are connected, a voltage-stabilizing amplitude is output at the same time, and meanwhile, the output end is connected with a light-emitting diode and a resistor R32 to indicate whether a power supply circuit works normally. The conversion circuit generates the common voltage stabilizing values of 12V, 5V and 3.3V, the voltage required by the design and use of internal components of the system is met, and meanwhile, power supply required by most external equipment of the system is strong in universality. The circuit is simple and practical, the stability is good, and the fault rate is reduced. Low cost, easy maintenance and wide market application.
In this embodiment, the positive input terminal of the power supply for converting the input voltage of the 12V circuit to the input voltage is the + output terminal, and the negative input terminal is the output terminal.
Further, in this embodiment, the output of the circuit for converting the input voltage into 12V is divided into two paths, one path supplies power to the system, that is, the circuit for converting 12V into 5V supplies power, and the other path supplies power to the external device.
Further, in this embodiment, the output of the 12V to 5V circuit is divided into two paths, one path supplies power to the 5V to 3.3V circuit, the other path supplies power to the GPRS/3G module, and the MOS tube is used to control the on/off state of the GPRS/3G module.
Further in this embodiment, the specific structure of the forward driving electronic switch includes: and the base electrode of the first NPN type triode is the control end of the forward driving electronic switch, the emitter electrode of the first NPN type triode is the grounding end of the forward driving electronic switch, and the collector electrode of the first NPN type triode is the output end of the forward driving electronic switch.
Further in this embodiment, the specific structure of the reverse driving electronic switch includes: the base electrode of the second PNP type triode is the control end of the reverse driving electronic switch, the emitting electrode of the second PNP type triode is the power supply end of the reverse driving electronic switch, and the collector electrode of the second PNP type triode is the output end of the reverse driving electronic switch.
In the description of the present invention, it should be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Claims (6)
1. The utility model provides a power supply conversion circuit of exportable steady voltage which characterized in that, includes power, a forward direction drive electronic switch and a reverse direction drive electronic switch, still includes: at least two N-channel MOSFET tubes, namely a first N-channel MOS tube and a second N-channel MOS tube, wherein the cathode of an auxiliary power supply is connected with the cathode of the power supply to form a common ground end, the grids of the first N-channel MOS tube and the second N-channel MOS tube are connected in parallel, the source electrode of the first N-channel MOS tube is connected with the anode of the power supply, the drain electrode of the first N-channel MOS tube is connected with the drain electrode of the second N-channel MOS tube, the source electrode of the second N-channel MOS tube is used as the output end of the power supply, the control end of the forward driving electronic switch is used as the control end of an output control circuit of the power supply, the grounding end of the forward driving electronic switch is connected with the common ground end, the output end of the forward driving electronic switch is connected with the control end of a reverse driving electronic switch through a fifth resistor, the output end of the forward driving electronic switch is also connected with the anode of the auxiliary power supply through a fourth resistor, and the power supply end, the output end of the reverse drive electronic switch is connected with the grid electrodes of the first N-channel MOS tube and the second N-channel MOS tube through a second resistor, the output end of the reverse drive electronic switch is connected with the source electrode of the first N-channel MOS tube through the first resistor, and the output end of the reverse drive electronic switch is connected with the source electrode of the second N-channel MOS tube through a third resistor; the circuit comprises an input voltage to 12V circuit, a 12V to 5V circuit and a 5V to 3.3V circuit, wherein the input voltage to 12V circuit, the 12V to 5V circuit and the 5V to 3.3V circuit are sequentially connected, the output of the input voltage to 12V circuit is the input of the 12V to 5V circuit, and the output of the 12V to 5V circuit is the input of the 5V to 3.3V circuit; the input voltage is converted into a 12V circuit, the output + end is connected with a capacitor C26, a capacitor C29 and VIN of a chip U1, the chip output end OUT is connected with a diode D1, an inductor L1, a capacitor C27, a capacitor C28 and a TVS tube, the circuit is used for filtering and protecting the circuit, and meanwhile, the output voltage stabilization amplitude is ensured to be 12V; the circuit is characterized by comprising a circuit from 12V to 5V, wherein the input voltage is connected with a capacitor C31, a capacitor C36 and VIN of a chip U2, the output end OUT of the chip is connected with a diode D2, an inductor L2, a capacitor C78, a capacitor C32 and a capacitor C33, the circuit is used for filtering and protecting the circuit, and meanwhile, the output voltage stabilization amplitude is ensured to be 5V; the circuit for converting 5V into 3.3V has the advantages that input voltage is connected with VIN of a capacitor C34, a capacitor C30 and a chip U3, two OUT output ends of the chip are connected, the capacitor C37, the capacitor C35 and a TVS tube are connected, a voltage-stabilizing amplitude is output at the same time, and meanwhile, the output end is connected with a light-emitting diode and a resistor R32 to indicate whether a power supply circuit works normally.
2. The power conversion circuit of claim 1, wherein the positive terminal of the power input of the input voltage to the 12V circuit is the output + terminal, and the negative terminal is the output-terminal.
3. The power conversion circuit capable of outputting stable voltage according to claim 2, wherein the output of the circuit for converting input voltage into 12V is divided into two paths, one path supplies power to the system, that is, the circuit for converting 12V into 5V supplies power, and the other path supplies power to the external devices.
4. The power conversion circuit capable of outputting a stable voltage according to claim 3, wherein the output of the 12V to 5V circuit is divided into two paths, one path supplies power to the 5V to 3.3V circuit, the other path supplies power to the GPRS/3G module, and the MOS tube is used for controlling the on/off of the GPRS/3G module.
5. The power conversion circuit capable of outputting a stable voltage according to claim 1, wherein the specific structure of the forward-driving electronic switch comprises: and the base electrode of the first NPN type triode is the control end of the forward driving electronic switch, the emitter electrode of the first NPN type triode is the grounding end of the forward driving electronic switch, and the collector electrode of the first NPN type triode is the output end of the forward driving electronic switch.
6. The power conversion circuit capable of outputting a stable voltage according to claim 1, wherein the specific structure of the reverse-drive electronic switch comprises: the base electrode of the second PNP type triode is the control end of the reverse driving electronic switch, the emitting electrode of the second PNP type triode is the power supply end of the reverse driving electronic switch, and the collector electrode of the second PNP type triode is the output end of the reverse driving electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920455574.6U CN209748409U (en) | 2019-04-04 | 2019-04-04 | Power supply conversion circuit capable of outputting stable voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920455574.6U CN209748409U (en) | 2019-04-04 | 2019-04-04 | Power supply conversion circuit capable of outputting stable voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209748409U true CN209748409U (en) | 2019-12-06 |
Family
ID=68719915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920455574.6U Expired - Fee Related CN209748409U (en) | 2019-04-04 | 2019-04-04 | Power supply conversion circuit capable of outputting stable voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209748409U (en) |
-
2019
- 2019-04-04 CN CN201920455574.6U patent/CN209748409U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203761022U (en) | High-efficiency direct-current input protection circuit | |
| CN113471938A (en) | Suspended power supply logic control backflow prevention circuit | |
| CN203219450U (en) | Set top box true standby and standby wake-up circuit and set top box | |
| CN209748409U (en) | Power supply conversion circuit capable of outputting stable voltage | |
| CN201682279U (en) | Power-source anti-reverse-connection circuit, LED lamp circuit and LED lamp | |
| CN210776688U (en) | Ideal diode circuit device with very low cost | |
| CN213341680U (en) | Isolated wake-up circuit and power supply equipment | |
| CN212413054U (en) | Double-tube flyback power supply | |
| CN110048680B (en) | Low-dropout high-power composite PMOS (P-channel metal oxide semiconductor) tube equivalent circuit | |
| CN210670013U (en) | IGBT short-circuit protection circuit | |
| CN102711308A (en) | LED (Light Emitting Diode) drive circuit and lamp | |
| CN201467324U (en) | Low power consumption CPU standby commutation circuit | |
| CN107168432B (en) | Low-power dissipation power supply power supply circuit | |
| CN206877188U (en) | Low-power dissipation power supply power supply circuit | |
| CN110706977A (en) | PWM control type relay | |
| CN210958153U (en) | Novel passive current-sharing line | |
| CN213072607U (en) | Low-power consumption wake-up circuit | |
| CN205921578U (en) | Digit addressable illumination interface DALI's level translation circuit | |
| CN215870903U (en) | Power supply switching circuit and 5G terminal adopting same | |
| CN220066872U (en) | Short-circuit overvoltage protection circuit | |
| CN219041632U (en) | Low-power consumption pulse direct current power supply | |
| CN213585190U (en) | Power control circuit with standby low power consumption | |
| CN216216525U (en) | Low ripple pulse width modulation's voltage follower circuit | |
| CN213185869U (en) | Power failure accelerating circuit, power supply circuit, driving board card and electronic equipment | |
| CN212747939U (en) | Motor power supply circuit of intelligent water meter and intelligent water meter system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191206 |