CN207150426U - Power supply output circuit - Google Patents
Power supply output circuit Download PDFInfo
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- CN207150426U CN207150426U CN201721064705.5U CN201721064705U CN207150426U CN 207150426 U CN207150426 U CN 207150426U CN 201721064705 U CN201721064705 U CN 201721064705U CN 207150426 U CN207150426 U CN 207150426U
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- microcontroller
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Abstract
The utility model discloses a power output circuit. The power output circuit includes: the Micro USB interface comprises a first pin, a second pin and a third pin, wherein the first pin of the Micro USB interface is connected with a first port of the microcontroller and used for outputting a pulse width modulation signal to the first port of the microcontroller; and the microcontroller is used for controlling the voltage value output by the power supply equipment according to the pulse width modulation signal and controlling whether the voltage output by the power supply equipment is output to the Micro USB interface or not through the current-limiting control circuit according to the power supply enabling signal. Through the utility model discloses, the problem that power output circuit among the correlation technique adopted the DC head to be difficult to satisfy the actual voltage demand as power output interface has been solved.
Description
Technical field
Power output circuit technical field is the utility model is related to, in particular to a kind of power output circuit.
Background technology
In medical display equipment, medical display interface be usually Display Port interfaces (abbreviation DP interfaces) and
DVI interface, inputted for video and picture signal.Due to the power demands of some external equipments, medical display equipment vendor leads to
The interface of power supply output can often be increased, the equipment for connecting the power supply of outside need medical display uses.Under normal circumstances, cure
By the use of display apparatus manufacturer the first-class conventional power output terminals of such as DC can be selected to be customized as power supply output or equipment vendor
A power output terminal, the power supply for particular device, which exports, to be used.Conventional DC heads or the power supply output of equipment vendor's customization
In interface, it is all provided with being set to fixed voltage output, or many medical displays export without D/C power.However, conventional skill
Problems be present in art scheme：Without voltage output or with fixed voltage output medical display power interface, to
The use at family causes limitation, and user can not use the interface according to the actual requirements.Such as the DC heads of medical display for+
3.3V power supplys export, then if necessary to output+5V power supplys, then can not use the medical display D/C power output interface；The DC
Head is easily mistakenly inserted.Because many power supply adaptors are also using corresponding to the DC heads such as+12V ,+9V out splice going splice
Male, if therefore user be mistakenly inserted in this interface, easily cause the damage of DC heads internal circuit, or even cause the damage of medical display
It is bad.If medical display uses the DC heads of customization, can avoid being mistakenly inserted, but the die sinking cost of wire rod and terminal is larger,
The demand of the controllable output of power supply is also can't resolve simultaneously.
DC heads are used for the power output circuit in correlation technique as power output interface to be difficult to meet virtual voltage
The problem of demand, effective solution is not yet proposed at present.
Utility model content
Main purpose of the present utility model is to provide a kind of power output circuit, defeated to solve the power supply in correlation technique
Go out the problem of circuit is difficult to meet virtual voltage demand using DC heads as power output interface.
To achieve these goals, the utility model provides a kind of power output circuit, including：Micro USB interfaces,
First pin of the Micro USB interfaces and the first port of microcontroller connect, for output pulse width modulated signal
To the first port of the microcontroller, the second pin of the Micro USB interfaces and the second port of the microcontroller
Connection, the second port for out-put supply enable signal to the microcontroller；Microcontroller, for wide according to the pulse
The magnitude of voltage of modulated signal control power-supply device output is spent, and for passing through Current limited Control electricity according to the power supply enable signal
Road controls whether the voltage of the power-supply device output is exported to the Micro USB interfaces.
Further, the first end of the current-limiting control circuit is connected with the output end of the power-supply device, the current limliting
Second end of control circuit is connected with the 4th port of the microcontroller, and the power supply is based on for receiving the microcontroller
The control signal of enable signal output, the current-limiting control circuit is controlled to disconnect or turn on according to the control signal.
Further, the 3rd end of the current-limiting control circuit is connected with the 3rd pin of the Micro USB interfaces,
When detecting that the current value that the 3rd pin of the Micro USB interfaces flows through exceedes pre-set current value, the Current limited Control electricity
Road disconnects.
Further, the power output circuit also includes：Digital regulation resistance, one end and the 3rd end of the microcontroller
Mouth connection, one end are connected with the feedback end of the power-supply device, the arteries and veins that the microcontroller is received based on the first port
Bandwidth modulation signals are rushed, by the resistance value of digital regulation resistance described in the 3rd port controlling, to adjust the power-supply device
The magnitude of voltage of output.
Further, the power output circuit also includes：Electric current pours in down a chimney detection circuit, and the electric current pours in down a chimney detection circuit
One end be connected with the Micro USB interfaces, the electric current pours in down a chimney the mould of the other end and the microcontroller of detection circuit
Number conversion port connection, for the voltage inputted from the Micro USB interfaces to be transmitted to the microcontroller.
Further, the current-limiting control circuit be additionally operable to by the voltage inputted from the Micro USB interfaces transmit to
The microcontroller.
Further, the power output circuit also includes：Target resistance, one end are connected with the digital regulation resistance, separately
One end is connected with the output end of the power-supply device.
To achieve these goals, the utility model provides a kind of medical display, including described in above-mentioned any one
Power output circuit.
By the utility model, the power output circuit includes：Micro USB interfaces, the of the Micro USB interfaces
The first port of one pin and microcontroller connects, the first end for output pulse width modulated signal to the microcontroller
Mouthful, the second pin of the Micro USB interfaces is connected with the second port of the microcontroller, for the enabled letter of out-put supply
Number to the microcontroller second port；Microcontroller, for controlling power-supply device according to the pulse width modulating signal
The magnitude of voltage of output, and for controlling the power-supply device to export by current-limiting control circuit according to the power supply enable signal
Voltage whether export the power output circuit to the Micro USB interfaces, solved in correlation technique and use DC head conducts
The problem of power output interface is difficult to meet virtual voltage demand.By using Micro USB interfaces as lead-out terminal, output
Power supply is controllable, and out-put supply is adjustable, and then the effect of the controllable output of the power output terminal on the power output circuit
Fruit.
Brief description of the drawings
Form a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new
The schematic description and description of type is used to explain the utility model, does not form to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is the schematic diagram of the power output circuit provided according to the utility model embodiment.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order that those skilled in the art more fully understand the utility model, it is real below in conjunction with the utility model
The accompanying drawing in example is applied, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that be described
Embodiment is only the embodiment of the utility model part, rather than whole embodiments.Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all should
When the scope for belonging to the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The data used can exchange in the appropriate case, so as to embodiment of the present utility model described herein.In addition, term " bag
Include " and " having " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of units
System, product or equipment be not necessarily limited to those steps clearly listed or unit, but may include not list clearly
Or for the intrinsic other steps of these processes, product or equipment or unit.
For the ease of description, below to the invention relates to part noun or term illustrate：
I/O port, it is input/output abbreviation, i.e. input/output port.Each equipment can have a special I/O
Address, for handling the input/output information of oneself.I/O equipment is various in style, and its corresponding interface circuit is also different, because
This, traditionally mentions interface and is only referred to I/O interface.
According to embodiment of the present utility model, there is provided a kind of power output circuit.
Fig. 1 is the schematic diagram of the power output circuit provided according to the utility model embodiment.As shown in figure 1, the circuit
Including：
Micro USB interfaces, the first pin of Micro USB interfaces and the first port of microcontroller connect, for defeated
Go out pulse width modulating signal to the first port of microcontroller, the second pin of Micro USB interfaces and the of microcontroller
Two-port netwerk connects, the second port for out-put supply enable signal to microcontroller；Microcontroller, for according to pulse width
The magnitude of voltage of modulated signal control power-supply device output, and for being controlled according to power supply enable signal by current-limiting control circuit
Whether the voltage of power-supply device output is exported to Micro USB interfaces.
As shown in figure 1, (second draws for the Power_PWM pins (the first pin) and Power_EN pins of Micro USB interfaces
Pin) it is connected on the I/O port of MCU (microcontroller), MCU is by detecting the PWM duty cycle of Micro USB interfaces input (in correspondence
The pulse width modulating signal stated) after, so as to reach the purpose of adjustment output voltage.Due to changing Power_PWM PWM duties
It is more adjustable than electric power output voltage can be achieved.Power_EN pins are used to control whether Micro USB export, when Power_EN is
Gao Shi, Micro USB export, otherwise if it is low when, Micro USB are not exported.So as to by using Micro USB interface conducts
Lead-out terminal, out-put supply are controllable.
The power output circuit that the utility model embodiment provides, the power output circuit include：Micro USB interfaces,
The first port of first pin of Micro USB interfaces and microcontroller connects, for output pulse width modulated signal to micro-
The first port of controller, the second pin of Micro USB interfaces and the second port of microcontroller connect, for out-put supply
Enable signal to microcontroller second port；Microcontroller, for controlling power-supply device defeated according to pulse width modulating signal
The magnitude of voltage gone out, and for according to power supply enable signal by current-limiting control circuit control power-supply device export voltage whether
To Micro USB interfaces, the power output circuit solved in correlation technique is difficult as power output interface using DC heads for output
The problem of to meet virtual voltage demand.By using Micro USB interfaces as lead-out terminal, out-put supply is controllable, output
Power supply is adjustable, and then the effect of the controllable output of the power output terminal on the power output circuit.
Alternatively, the utility model embodiment provide power output circuit in, the first end of current-limiting control circuit with
The output end connection of power-supply device, the second end of current-limiting control circuit and the 4th port of microcontroller connect, micro- for receiving
The control signal that controller is exported based on power supply enable signal, current-limiting control circuit is controlled to disconnect or turn on according to control signal.
By the electric current of current-limiting control circuit control output, to prevent that output current is excessive.If the power output circuit should
With on medical display, the electric current of output is controlled by current-limiting control circuit, it is therefore prevented that output current is excessive to influence medical show
Show device allomeric function.
Alternatively, the utility model embodiment provide power output circuit in, the 3rd end of current-limiting control circuit with
The 3rd pin connection of Micro USB interfaces, detecting that it is pre- that current value that the 3rd pin of Micro USB interfaces flows through exceedes
If during current value, current-limiting control circuit disconnects.
In the load short circuits of Micro USB interfaces connection, output current increased dramatically, and current-limiting control circuit detects
When the current value that 3rd pin of Micro USB interfaces flows through exceedes pre-set current value, current-limiting control circuit disconnects, so as to
Disconnecting circuit, avoid whole power output circuit and be damaged.
Alternatively, in the power output circuit that the utility model embodiment provides, power output circuit also includes：Numeral
The 3rd port connection of potentiometer, one end and microcontroller, the feedback end of one end and power-supply device connect, and microcontroller is based on the
The pulse width modulating signal that Single port receives, by the resistance value of digital regulation resistance described in the 3rd port controlling, with
The magnitude of voltage of regulation power supply equipment output.
MCU controls the resistance value of digital regulation resistance by I/O port, so as to the magnitude of voltage of regulation power supply equipment output.
Alternatively, in the power output circuit that the utility model embodiment provides, power output circuit also includes：Electric current
Pour in down a chimney detection circuit, one end that electric current pours in down a chimney detection circuit is connected with Micro USB interfaces, and electric current pours in down a chimney the another of detection circuit
End is connected with the analog-to-digital conversion port of microcontroller, for the voltage inputted from Micro USB interfaces to be transmitted to microcontroller.
Also pour in down a chimney detection circuit comprising electric current in the power output circuit that the utility model embodiment provides, as MCU ADC
Mouth is by detecting that electric current pours in down a chimney the output voltage of detection circuit, you can judge whether Micro USB are mistakenly inserted power supply, when
When detecting that electric current pours in down a chimney, MCU is by control signal, and the input and output for making current-limiting control circuit disconnect, so as to effective resistance
Foreign current is counter to be poured into circuit.
Alternatively, the utility model embodiment provide power output circuit in, current-limiting control circuit be additionally operable to by from
The voltage of Micro USB interfaces input is transmitted to microcontroller.
Alternatively, in current-limiting control circuit can also integrated current pour in down a chimney detection circuit, will be inputted from Micro USB interfaces
Voltage transmit to MCU, when MCU ADC mouths by detect Micro USB interfaces input voltage, you can judge Micro
Whether USB is mistakenly inserted power supply, when detecting that electric current pours in down a chimney, MCU by control signal, make current-limiting control circuit input and
Output disconnects, and so as to effective resistance, foreign current is counter is poured into circuit.
Alternatively, in the power output circuit that the utility model embodiment provides, power output circuit also includes：Target
Resistance, one end are connected with digital regulation resistance, the output end connection of the other end and power-supply device.
R in above-mentioned first resistor corresponding diagram 1.
To achieve these goals, the utility model provides a kind of medical display, includes the electricity of above-mentioned any one
Source follower circuit.
Embodiment of the present utility model is these are only, is not limited to the utility model.For art technology
For personnel, the utility model can have various modifications and variations.It is all to be made within spirit of the present utility model and principle
Any modification, equivalent substitution and improvements etc., it should be included within right of the present utility model.
Claims (8)
- A kind of 1. power output circuit, it is characterised in that including：Micro USB interfaces, the first pin of the Micro USB interfaces and the first port of microcontroller connect, for defeated Go out pulse width modulating signal to the first port of the microcontroller, the second pin of the Micro USB interfaces with it is described The second port connection of microcontroller, the second port for out-put supply enable signal to the microcontroller；Microcontroller, for controlling the magnitude of voltage of power-supply device output according to the pulse width modulating signal, and for root Whether the voltage for controlling the power-supply device to export by current-limiting control circuit according to the power supply enable signal is exported to described Micro USB interfaces.
- 2. power output circuit according to claim 1, it is characterised in that the first end of the current-limiting control circuit and institute The output end connection of power-supply device is stated, the second end of the current-limiting control circuit is connected with the 4th port of the microcontroller, The control signal exported for receiving the microcontroller based on the power supply enable signal, institute is controlled according to the control signal Current-limiting control circuit is stated to disconnect or turn on.
- 3. power output circuit according to claim 1, it is characterised in that the 3rd end of the current-limiting control circuit and institute The 3rd pin connection of Micro USB interfaces is stated, in the current value for detecting the 3rd pin of the Micro USB interfaces and flowing through During more than pre-set current value, the current-limiting control circuit disconnects.
- 4. power output circuit according to claim 1, it is characterised in that the power output circuit also includes：Digital regulation resistance, one end are connected with the 3rd port of the microcontroller, and one end and the feedback end of the power-supply device connect Connect, the pulse width modulating signal that the microcontroller is received based on the first port, pass through the 3rd port controlling The resistance value of the digital regulation resistance, to adjust the magnitude of voltage of the power-supply device output.
- 5. power output circuit according to claim 1, it is characterised in that the power output circuit also includes：Electric current pours in down a chimney detection circuit, and one end that the electric current pours in down a chimney detection circuit is connected with the Micro USB interfaces, the electricity The other end that stream pours in down a chimney detection circuit is connected with the analog-to-digital conversion port of the microcontroller, for will be from the Micro USB The voltage of interface input is transmitted to the microcontroller.
- 6. power output circuit according to claim 1, it is characterised in that the current-limiting control circuit is additionally operable to from institute The voltage for stating the input of Micro USB interfaces is transmitted to the microcontroller.
- 7. power output circuit according to claim 4, it is characterised in that the power output circuit also includes：Target resistance, one end are connected with the digital regulation resistance, and the other end is connected with the output end of the power-supply device.
- 8. a kind of medical display, it is characterised in that export electricity including the power supply described in any one of the claims 1 to 7 Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721064705.5U CN207150426U (en) | 2017-08-23 | 2017-08-23 | Power supply output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721064705.5U CN207150426U (en) | 2017-08-23 | 2017-08-23 | Power supply output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207150426U true CN207150426U (en) | 2018-03-27 |
Family
ID=61669758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721064705.5U Active CN207150426U (en) | 2017-08-23 | 2017-08-23 | Power supply output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207150426U (en) |
-
2017
- 2017-08-23 CN CN201721064705.5U patent/CN207150426U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220824 Address after: Room 409, No. 192 Kezhu Road, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Guangzhou Shichuang Display Technology Co.,Ltd. Address before: 510530 No. 6, Yun Po four road, Whampoa District, Guangzhou, Guangdong. Patentee before: Guangzhou Shiyuan Electronic Technology Company Limited Patentee before: GUANGZHOU XICOO MEDICAL TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |