CN217689810U - Power supply soft switch control circuit - Google Patents
Power supply soft switch control circuit Download PDFInfo
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- CN217689810U CN217689810U CN202220991248.9U CN202220991248U CN217689810U CN 217689810 U CN217689810 U CN 217689810U CN 202220991248 U CN202220991248 U CN 202220991248U CN 217689810 U CN217689810 U CN 217689810U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a power supply soft switch control circuit, which relates to the field of medical electronic equipment and comprises an input power supply and an MOS (metal oxide semiconductor) tube; the input power supply is connected with the MOS tube and the first resistor, and the MOS tube is connected with the CPU control panel through the output power supply VOUT; the diode is connected with the MOS tube, the diode is connected with the fourth resistor and the CPU control panel, the other end of the fourth resistor is connected with the CPU power supply, the diode is connected with one end of the key, and the other end of the key is connected with a ground signal GND; the first resistor is connected with the MOS tube and the triode, the triode is connected with a ground signal GND and the second resistor, the triode is connected with the second resistor and the third resistor, and the third resistor is connected with the CPU control board. The convenience of customers can carry out the cutting off and the switch-on of load through the button, compares self-locking type switch convenient operation, for satisfying the future demand of medical electronics trade, has prevention and avoids the occurence of failure, does not have switching loss, reduces a great deal of advantages such as artificial maloperation and electronic equipment maintenance.
Description
Technical Field
The utility model relates to a medical electronic equipment field specifically is a soft on-off control circuit of power.
Background
With the technical development of the medical electronic industry, a medical electronic device system is required to have higher stability and safety, and the working efficiency of a circuit system is expected to be improved, while in the existing power supply system of medical electronic equipment, a power switch is required to be introduced to facilitate the on/off control of an operator, but most of the existing power supply systems adopt a self-locking switch which can be directly turned on and off after being pressed down and can also realize the control of the power supply, but the self-locking switch is easy to generate misoperation, has switching loss, often occupies space, is not attractive, is inconvenient to use, and also causes instability and unsafety of electronic products.
There is a need for a switching circuit that can solve the problems of mis-operation, switching loss, and instability and insecurity of the power supply of electronic products. Therefore, a soft start switch control circuit for a power supply is now proposed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a soft on-off control circuit of power to solve the problem that proposes in the above-mentioned background art.
In order to solve the technical problem, the utility model provides a following technical scheme: a power supply soft switch control circuit comprises an input power supply, an MOS (metal oxide semiconductor) tube, a first resistor, a triode, a second resistor, a third resistor, a diode, a key, a fourth resistor, an output power supply VOUT (volatile organic Compounds), and a CPU (Central processing Unit) control board;
an input power supply is connected with a pin 2-1 of an MOS (metal oxide semiconductor) tube and a pin 3-1 of a first resistor, a pin 2-2 of the MOS tube is connected with a pin 13-1 of an output power supply VOUT, and a pin 13-2 of the output power supply VOUT is connected with a pin 14-1 of a CPU (central processing unit) control board;
a pin 8-1 of the diode is connected with a pin 2-3 of the MOS tube, a pin 8-2 of the diode is connected with a pin 11-1 of the fourth resistor and a pin 14-2 of the CPU control board, a pin 11-2 of the fourth resistor is connected with a CPU power supply, a pin 8-3 of the diode is connected with one end of the key, and the other end of the key is connected with a ground signal GND;
the pin 3-2 of the first resistor is connected with the pin 2-3 of the MOS tube and the pin 4-1 of the triode, the pin 4-3 of the triode is connected with a ground signal GND and the pin 6-2 of the second resistor, the pin 4-2 of the triode is connected with the pin 6-1 of the second resistor and the pin 7-1 of the third resistor, and the pin 7-2 of the third resistor is connected with the pin 14-3 of the CPU control board.
Preferably, the diode is a germanium diode.
Preferably, the third resistor has a resistance of 1K ohm.
Preferably, the resistance values of the first resistor, the second resistor and the fourth resistor are 4.7K-10K.
Preferably, the first resistor, the second resistor and the fourth resistor have a resistance value of 10k.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a soft switch control circuit is furnished with the button, and convenience of customers can carry out cutting off and putting through to the load through the button, compares self-locking type switch convenient operation, for satisfying the future demand of medical electronics trade, has the prevention and avoids the occurence of failure, does not have switching loss, reduces a great deal of advantages such as artificial maloperation and electronic equipment maintenance, provides solid, reliable basis for the modernization management of medical industry.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
In the figure: 1. inputting a power supply; 2. an MOS tube; 3. a first resistor; 4. a triode; 6. a second resistor; 7. a third resistor; 8. a diode; 9. pressing a key; 10. a ground signal; 11. a fourth resistor; 12. a CPU power supply; 13. outputting a power supply VOUT; 14. and a CPU control board.
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 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.
Referring to fig. 1, the present embodiment provides a power soft switch control circuit, which includes an input power 1, an MOS transistor 2, a first resistor 3, a triode 4, a second resistor 6, a third resistor 7, a diode 8, a key 9, a fourth resistor 11, an output power 13, and a CPU control board 14.
In this embodiment, the voltage of the input power VIN is 3.3V to 12V. The third resistor 7 has a resistance of 1K ohm, and the first resistor 3, the second resistor 6 and the fourth resistor 11 have a resistance of 4.7K-10K, preferably 10K.
An input power supply 1 is connected with a pin 2-1 of an MOS tube 2 and a pin 3-1 of a first resistor 3, a pin 2-2 of the MOS tube 2 is connected with a pin 13-1 of an output power supply VOUT13, and a pin 13-2 of the output power supply VOUT13 is connected with a pin 14-1 of a CPU control board 14.
In the non-power-on state, the key 9 is not pressed, the input power VIN (3.3V-12V) provides input voltage, the input voltage is respectively connected through a pin 2-1 of the MOS transistor 2 and a pin 3-1 of the first resistor 3, the pin 3-2 voltage of the first resistor 3 is equal to the input voltage value, the pin 2-3 voltage of the MOS transistor 2 is equal to the pin 3-2 voltage value of the input voltage value first resistor 3, that is, equal to the pin 2-3 voltage value of the MOS transistor 2, in this state, the potential difference is zero, the output voltage value of the output power VOUT13 is zero, the pin 14-1 of the CPU control board 14 has no input voltage, and the CPU control board 14 does not work.
In the embodiment, a pin 8-1 of a diode 8 is connected with a pin 2-3 of an MOS (metal oxide semiconductor) tube 2, a pin 8-2 of the diode 8 is connected with a pin 11-1 of a fourth resistor 11 and a pin 14-2 of a CPU (central processing unit) control board 14, a pin 11-2 of the fourth resistor 11 is connected with a CPU (central processing unit) power supply 12, a pin 8-3 of the diode 8 is connected with one end of a key 9, and the other end of the key 9 is connected with a ground signal GND10;
the pin 3-2 of the first resistor 3 is connected with the pin 2-3 of the MOS tube 2 and the pin 4-1 of the triode 4, the pin 4-3 of the triode 4 is connected with a ground signal GND10 and the pin 6-2 of the second resistor 6, the pin 4-2 of the triode 4 is connected with the pin 6-1 of the second resistor 6 and the pin 7-1 of the third resistor 7, and the pin 7-2 of the third resistor 7 is connected with the pin 14-3 of the CPU control board 14.
In this embodiment, the diode 8 is a germanium diode, the triode 4 is a germanium triode, and the general voltage drop of the germanium triode is 0.4V.
When the power-on state is started, a key is pressed down, an input power VIN (3.3V-12V) provides input voltage, the input voltage is respectively connected through a pin 2-1 of an MOS tube 2 and a pin 3-1 of a first resistor 3, the pin 3-2 voltage value of the first resistor 3 is equal to the input voltage value, the pin 2-3 of the MOS tube 2 is connected with a pin 8-1 of a diode 8, the voltage is instantly reduced to 0.4V (the general voltage drop of a germanium tube is 0.4V), the pin 8-2 voltage value of the diode 8 is 0.4V, the pin 2-3 voltage value of the MOS tube 2 is 0.4V, and the pin 2-1 voltage value of the MOS tube 2 is equal to the input voltage VIN (3.3V-12V). The voltage value of the pin 2-1 of the MOS transistor 2 is greater than the voltage value of the pin 2-3 of the MOS transistor 2, and at this time, the MOS transistor 2 is in a conducting state, and the voltage value of the pin 2-2 of the MOS transistor 2 is equal to the input voltage VIN (3.3V-12V).
The pin 13-2 of the output power source VOUT13 has output voltage, then the pin 14-1 of the CPU control board 14 is connected with input voltage, the pin 8-2 of the diode 8 is 0.4V and is low level, the pin 14-2 of the CPU control board 14 is connected with low level, the CPU control board 14 collects 2S low level, the CPU receives key press signal, then the control signal of the pin 14-3 of the CPU control board 14 outputs high level, the output high level is connected with the pin 7-2 of the third resistor 7, after the voltage division of the third resistor 7 and the second resistor 6, the pin 4-2 of the triode 4 is connected with the pin 4-2 of the triode 4, the pin 4-2 of the triode 4 is pulled down to 0.4V instantly (the general voltage drop of the germanium tube is 0.4V), the pin 4-3 of the triode 4 is connected with low level, the voltage value of the pin 4-2 is larger than the pin 4-3 of the triode 4, and the triode 4 is in conduction state.
After the conduction, the pin 4-1 of the triode is at a low level, and the pin 4-1 of the triode is connected with the pin 2-3 of the MOS tube, so the pin 2-3 of the MOS tube is at the low level, the voltage value of the pin 2-1 of the MOS tube is equal to the input voltage value, the voltage value of the pin 2-1 of the MOS tube is greater than the voltage value of the pin 2-3 of the MOS tube, the MOS tube 2 is conducted, the key is released, the power supply is continuously output at the moment, and the CPU control panel 14 works normally.
When the key is pressed down in a shutdown state, the level connected to a pin 14-2 of the CPU control board 14 changes from high to low, the CPU control board 14 acquires a low level, when the low level is 2S after continuing, the CPU control board receives a key press shutdown signal, then a control signal of a pin 14-3 of the CPU control board 14 outputs the low level, the output low level is connected with a pin 7-2 of a third resistor 7 and is connected with a pin 4-2 of a triode 4 after voltage division of the third resistor 7 and a second resistor 6, the pin 4-2 of the triode 4 is instantly pulled down to 0V, the pin 4-3 of the triode 4 is connected to the low level, the voltage value of the pin 4-2 of the triode 4 is equal to the voltage value of the pin 4-3 of the triode 4, the triode 4-1 of the triode 4 is not conducted, the pin 4-1 of the triode becomes high level, the pin 2-3 of the MOS tube is connected to the pin 2-3 of the MOS tube, the voltage value of the pin 2-1 of the MOS tube is equal to the input voltage value, the voltage value of the pin 2-1 of the MOS tube is equal to the voltage value of the input voltage, the MOS tube 2-3, the pin VOUT tube is not disconnected, the CPU control board 14 does not work, and the CPU control board does not work.
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 invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A kind of power soft switch control circuit, characterized by that: the circuit comprises an input power supply (1), an MOS (metal oxide semiconductor) tube (2), a first resistor (3), a triode (4), a second resistor (6), a third resistor (7), a diode (8), a key (9), a fourth resistor (11), an output power supply VOUT (13) and a CPU control board (14);
an input power supply (1) is connected with a pin 2-1 of an MOS (metal oxide semiconductor) tube (2) and a pin 3-1 of a first resistor (3), a pin 2-2 of the MOS tube (2) is connected with a pin 13-1 of an output power supply VOUT (13), and a pin 13-2 of the output power supply VOUT (13) is connected with a pin 14-1 of a CPU control board (14);
a pin 8-1 of a diode (8) is connected with a pin 2-3 of an MOS (metal oxide semiconductor) tube (2), a pin 8-2 of the diode (8) is connected with a pin 11-1 of a fourth resistor (11) and a pin 14-2 of a CPU control panel (14), a pin 11-2 of the fourth resistor (11) is connected with a CPU power supply (12), a pin 8-3 of the diode (8) is connected with one end of a key (9), and the other end of the key (9) is connected with a ground signal GND (10);
the pin 3-2 of the first resistor (3) is connected with the pin 2-3 of the MOS tube (2) and the pin 4-1 of the triode (4), the pin 4-3 of the triode (4) is connected with a ground signal GND (10) and the pin 6-2 of the second resistor (6), the pin 4-2 of the triode (4) is connected with the pin 6-1 of the second resistor (6) and the pin 7-1 of the third resistor (7), and the pin 7-2 of the third resistor (7) is connected with the pin 14-3 of the CPU control board (14).
2. The soft switching control circuit of claim 1, wherein: the diode (8) is a germanium diode.
3. The soft switching control circuit of claim 1, wherein: the resistance value of the third resistor (7) is 1K ohm.
4. The soft switching control circuit of claim 1, wherein: the resistance values of the first resistor (3), the second resistor (6) and the fourth resistor (11) are 4.7K-10K.
5. The soft switching control circuit of claim 1, wherein: the resistance values of the first resistor (3), the second resistor (6) and the fourth resistor (11) are 10k.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220991248.9U CN217689810U (en) | 2022-04-26 | 2022-04-26 | Power supply soft switch control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220991248.9U CN217689810U (en) | 2022-04-26 | 2022-04-26 | Power supply soft switch control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217689810U true CN217689810U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220991248.9U Active CN217689810U (en) | 2022-04-26 | 2022-04-26 | Power supply soft switch control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217689810U (en) |
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2022
- 2022-04-26 CN CN202220991248.9U patent/CN217689810U/en active Active
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