CN112117996A - Button awakening circuit with isolated power supply - Google Patents
Button awakening circuit with isolated power supply Download PDFInfo
- Publication number
- CN112117996A CN112117996A CN202011015237.9A CN202011015237A CN112117996A CN 112117996 A CN112117996 A CN 112117996A CN 202011015237 A CN202011015237 A CN 202011015237A CN 112117996 A CN112117996 A CN 112117996A
- Authority
- CN
- China
- Prior art keywords
- key
- diode
- power
- power supply
- resistor
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/002—Switching arrangements with several input- or output terminals
- H03K17/005—Switching arrangements with several input- or output terminals with several inputs only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to a key awakening circuit with isolated power supply, which utilizes the one-way conduction characteristic of a diode D1 and a diode D2, when a second system does not supply power, a key is pressed down, a diode D2 is conducted, a first system forms a loop, and therefore the key is detected to be pressed down, so that the first system is awakened, and power is supplied to the second system. When the second system is normally powered, the diode D1 can isolate the detection signals, and the detection signals in the two systems do not interfere with each other. When the second system supplies power normally, the diode D2 is not conducted, and the current loop of the first system passes through the BGND and then is connected to AGND through the dc isolation power supply module, and does not pass through the diode D2, so that the isolation between the two systems can still be realized.
Description
Technical Field
The invention relates to the field of power isolation circuits, in particular to a power isolation key wake-up circuit.
Background
In industrial control devices, power ground isolation between two systems is sometimes required, for example, a power isolation system includes a first system and a second system, power of the second system is provided by the first system, and a ground of the first system is isolated from a ground of the second system.
In the case where the first system does not provide power to the second system, the first system generally needs to be woken up to provide power to the second system. At present, the wake-up button is generally independently arranged in a first system and forms a loop, but the wake-up button cannot be arranged in a second system.
Assuming that the wake-up key is located in the second system, the first system should be able to detect whether the key in the second system is pressed. In the case where the power supply is isolated and not powered, the impedance between the 0 potential of the first system (referred to as the first system ground, hereinafter, AGND is used instead) and the 0 potential of the second system (referred to as the first system ground, hereinafter, BGND is used instead) is large, and whether the first system is pressed or not is not detected.
Disclosure of Invention
In view of the problems in the prior art, an object of the present invention is to provide a power-isolated key wake-up circuit, which can detect a key by a first system even when a second system does not supply power, so as to achieve normal wake-up.
In order to achieve the purpose, the invention adopts the technical scheme that:
a power supply isolated KEY awakening circuit is applied to A power supply isolation system, the power supply isolation system comprises A first system and A second system, the first system supplies power to the second system through A direct-current isolation power supply module, the KEY awakening circuit comprises A resistor R1, A resistor R2, A diode D1, A resistor R2 and KEYs, one end of the resistor R1 is connected with A power supply VA of the first system, and the other end of the resistor R1 is connected with A detection end KEY-IN-A and the KEYs of the first system; one end of the resistor R2 is connected to the power supply Vb of the second system, the other end is connected to the detection terminal KEY-IN-B of the second system, and the anode of the diode D1, while the cathode of the diode D1 is connected to the KEY, the KEY is connected to the ground terminal BGND of the second system, and the KEY is connected to the ground terminal AGND of the first system through the diode D2, the anode of the diode D2 is connected to the KEY, and the cathode is connected to the ground terminal AGND of the first system.
The model of the direct current isolation power supply module is URB _ YMD-15WR 3.
After the scheme is adopted, by utilizing the one-way conduction characteristics of the diode D1 and the diode D2, when the second system does not supply power, the key is pressed down, the diode D2 is conducted, and the first system forms a loop, so that the key is detected to be pressed down, the first system is awakened, and the power is supplied to the second system. When the second system is normally powered, the diode D1 can isolate the detection signals, and the detection signals in the two systems do not interfere with each other. When the second system supplies power normally, the diode D2 is not conducted, and the current loop of the first system passes through the BGND and then is connected to AGND through the dc isolation power supply module, and does not pass through the diode D2, so that the isolation between the two systems can still be realized.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Description of reference numerals:
a first system 10; a second system 20.
Detailed Description
The purpose of power isolation is to make the devices of the two systems not interfere with each other after working, so long as some kind of connection is established between the first system 10 and the second system 20, but the connection cannot affect the respective working of the first system 10 and the second system 20, it is possible to realize that the first system 10 can normally detect the key even when the second system 20 is not powered. Based on this, as shown in fig. 1, the present invention discloses a power-isolated key wake-up circuit, which is applied in a power-isolated system, where the power-isolated system includes a first system 10 and a second system 20, and the first system 10 supplies power to the second system 20 through a DC-isolated power module DC 1. In the embodiment, the model of the direct-current isolation power supply module DC1 is URB _ YMD-15WR3, and the manufacturer is manufactured by Guangzhou Jinshengyang.
Specifically, the KEY wake-up circuit comprises A resistor R1, A resistor R2, A diode D1, A resistor R2 and A KEY SW1, wherein one end of the resistor R1 is connected with A power supply VA of the first system 10, and the other end of the resistor R1 is connected with A detection end KEY-IN-A of the first system 10 and the KEY SW 1; resistor R2 has one end connected to power supply Vb of second system 20 and the other end connected to detection terminal KEY-IN-B of second system 20 and the anode of diode D1, while the cathode of diode D1 is connected to button SW1, button SW1 is connected to ground terminal BGND of second system 20 and the ground terminal AGND of first system 10 via diode D2, the anode of diode D2 is connected to button SW1, and the cathode is connected to ground terminal AGND of first system 10.
The working principle of the invention is as follows:
IN A state where the first system 10 does not supply power to the second system 20, KEY-IN-A of the first system 10 detects A high level. When the KEY SW1 is pressed, the diode D2 is turned on, and the KEY SW1 establishes A loop path IN the first system 10, so the detection terminal KEY-IN-A can detect A low signal, and the second system 20 is not affected by the power supply. After the detection terminal KEY-IN-A of the first system 10 detects the low level signal, the first system 10 supplies power to the second system 20 through the DC isolation power module DC1, and the second system 20 works normally.
During the time that the second system 20 is powered on, if the KEY is not pressed, the detection terminal KEY-IN-B of the second system 20 detects a high level. When the KEY SW1 is pressed, the power supply Vb supplies power normally, the diode D1 is conducted, the power supply Vb of the second system 20 forms a loop through the resistor R2, the diode D1, the SW1 and the BGND, the detection end KEY-IN-B detects a low level, and the diode D1 can be used for isolating detection signals, so that the detection signals IN the two systems cannot interfere with each other. In the power-on state of the second system 20, the impedance between AGND and BGND is small, and the diode D2 needs a conduction voltage drop of about 0.5V for conduction, so the circuit return path of the first system 10 does not pass through the diode D2, but flows to BGND and AGND through the DC isolation power module DC1, so the isolation function can still be achieved.
The above description is only exemplary of the present invention and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above exemplary embodiments according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (2)
1. The utility model provides a button awakening circuit that power was kept apart, its is applied to in the power isolation system, and the power isolation system includes first system and second system, and first system passes through direct current isolation power module and supplies power, its characterized in that to the second system: the KEY awakening circuit comprises A resistor R1, A resistor R2, A diode D1, A resistor R2 and A KEY, wherein one end of the resistor R1 is connected with A power supply VA of the first system, and the other end of the resistor R1 is connected with A detection end KEY-IN-A of the first system and the KEY; one end of the resistor R2 is connected to the power supply Vb of the second system, the other end is connected to the detection terminal KEY-IN-B of the second system, and the anode of the diode D1, while the cathode of the diode D1 is connected to the KEY, the KEY is connected to the ground terminal BGND of the second system, and the KEY is connected to the ground terminal AGND of the first system through the diode D2, the anode of the diode D2 is connected to the KEY, and the cathode is connected to the ground terminal AGND of the first system.
2. The power-isolated key wake-up circuit of claim 1, wherein: the model of the direct current isolation power supply module is URB _ YMD-15WR 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011015237.9A CN112117996A (en) | 2020-09-24 | 2020-09-24 | Button awakening circuit with isolated power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011015237.9A CN112117996A (en) | 2020-09-24 | 2020-09-24 | Button awakening circuit with isolated power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112117996A true CN112117996A (en) | 2020-12-22 |
Family
ID=73801123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011015237.9A Pending CN112117996A (en) | 2020-09-24 | 2020-09-24 | Button awakening circuit with isolated power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112117996A (en) |
-
2020
- 2020-09-24 CN CN202011015237.9A patent/CN112117996A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6600239B2 (en) | Active circuit protection for switched power supply system | |
| CN109166546B (en) | Display screen circuit and central control screen system comprising same | |
| CN101135890A (en) | Electricity-saving mode power management system and method thereof | |
| US9904347B2 (en) | Field device | |
| CN106843442B (en) | Vehicle-mounted multimedia low-power-consumption dormancy device and method based on data protection | |
| TWI639017B (en) | Detection system and detection circuit for detecting health status of backup power module | |
| US8200997B2 (en) | Computer wake up circuit includes a switch configured to prevent a control signals from an I/O controller being transmitted to south-bridge | |
| US10601519B2 (en) | Receiver circuit with low power consumption and method for reducing power consumption of receiver system | |
| CN215705794U (en) | Charging interface awakening circuit | |
| US9235246B2 (en) | Computing device and power supply method of connection module | |
| CN213279609U (en) | Button awakening circuit with isolated power supply | |
| CN112117996A (en) | Button awakening circuit with isolated power supply | |
| EP2720356B1 (en) | Power supply system and power control circuit thereof | |
| US11793954B2 (en) | Inhalation device, substance storage, inhalation system, and method of operating an inhalation device | |
| WO2022083360A1 (en) | Display touch apparatus and power supply control method | |
| CN212811664U (en) | Geomagnetic detection Hall switch | |
| CN108322223B (en) | State holding circuit with release function | |
| KR101864021B1 (en) | Etc obu system for dsrc | |
| CN112684722A (en) | Low-power consumption power supply control circuit | |
| CN217956771U (en) | Power supply switching device and vehicle | |
| CN216927408U (en) | Key circuit, emergency call key and vehicle-mounted equipment | |
| CN220857661U (en) | Charging control circuit and device | |
| CN220105273U (en) | Power-on detection circuit of electric energy meter | |
| CN107238805A (en) | The detecting system and detection circuit of standby power supply module health status | |
| CN215954095U (en) | Protection circuit for preventing vehicle-mounted interface from being awakened by mistake |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210621 Address after: No. 15, Shishan North Road, Dongfu street, Haicang District, Xiamen City, Fujian Province, 361000 Applicant after: TBB POWER (XIAMEN) Co.,Ltd. Address before: Room 302, No.15, Shishan North Road, Dongfu street, Haicang District, Xiamen City, Fujian Province Applicant before: Xiamen Hanneng Energy Technology Co.,Ltd. |
|
| TA01 | Transfer of patent application right |