CN112787494A - Power supply control circuit and method for controlling power supply of breathing machine - Google Patents
Power supply control circuit and method for controlling power supply of breathing machine Download PDFInfo
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- CN112787494A CN112787494A CN202011630702.XA CN202011630702A CN112787494A CN 112787494 A CN112787494 A CN 112787494A CN 202011630702 A CN202011630702 A CN 202011630702A CN 112787494 A CN112787494 A CN 112787494A
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- chip
- level signal
- logic control
- power supply
- control chip
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- 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
- H02M1/36—Means for starting or stopping converters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
Abstract
The invention belongs to the technical field of power supply control of medical equipment, and particularly relates to a power supply control circuit for controlling a power supply of a breathing machine, which comprises an MCU chip, a logic control chip, a reset chip and a power supply IC chip which are mutually and electrically connected; the MCU chip is used for generating a high-low level signal and a pulse wave signal and respectively inputting the high-low level signal and the pulse wave signal to the logic control chip; the logic control chip is used for outputting a low level signal or a high level signal according to the received high and low level signal and the pulse wave signal and inputting the low level signal or the high level signal to an enabling control pin of the power supply IC chip; the logic control chip is also used for determining the initial state of the logic control chip when the logic control chip is normally electrified for the first time according to the received reset level signal; the power supply IC chip is used for controlling the on-off of the power supply of the breathing machine according to the received low level signal or high level signal; the reset chip is used for generating a reset level signal during initial power-on and inputting the reset level signal to the logic control chip.
Description
Technical Field
The invention belongs to the technical field of power supply control of medical equipment, and particularly relates to a power supply control circuit and method for controlling a power supply of a breathing machine.
Background
A Power Management circuit of an MCU (Micro Controller Unit, abbreviated as microcontroller Unit, also called as a single chip microcomputer) chip is crucial for a ventilator, and a current ventilator Power control circuit is usually directly connected to an enable control pin of a Power Management Integrated circuit (Power IC chip) through a GPIO pin of the MCU chip, and the enable pin of the MCU chip is utilized to directly control an enable signal of the Power IC chip or the entire Power control circuit, so as to implement a Power-on or Power-off function of the entire ventilator device, thereby controlling the on/off of the entire Power control circuit.
However, when the MCU chip is reset accidentally, the GPIO of the MCU chip will enter the default setting during resetting, which results in the power IC chip or the entire power control circuit losing effective enable signals, causing unexpected power down, and bringing safety risk to the entire ventilator.
Disclosure of Invention
In order to solve the above defects in the prior art, the invention provides a power supply control circuit for controlling a power supply of a breathing machine, which comprises an MCU chip, a logic control chip, a reset chip and a power supply IC chip which are mutually and electrically connected;
the MCU chip is used for generating a high-low level signal and a pulse wave signal and respectively inputting the high-low level signal and the pulse wave signal to the logic control chip;
the logic control chip is used for outputting a low level signal or a high level signal according to the received high and low level signal and the pulse wave signal and inputting the low level signal or the high level signal to an enabling control pin of the power supply IC chip;
the logic control chip is also used for determining the initial state of the logic control chip when the logic control chip is normally electrified for the first time according to the received reset level signal;
the power supply IC chip is used for controlling the on-off of the power supply of the breathing machine according to the received low level signal or high level signal;
the reset chip is used for generating a reset level signal during initial power-on and inputting the reset level signal to the logic control chip.
As one improvement of the above technical solution, a first GPIO pin and a second GPIO pin of the MCU chip are respectively and correspondingly connected to a first input pin and a second input pin of the logic control chip, and a high-low level signal and a corresponding pulse signal generated by the MCU chip are respectively input to the first input pin and the second input pin of the logic control chip through the first GPIO pin and the second GPIO pin, so as to control the state of an output pin of the logic control chip together;
and an output pin of the logic control chip is connected to an enable control pin of the power supply IC chip to control the on-off of the power supply IC chip.
As one improvement of the above technical solution, the output pin of the reset chip is connected to the third input pin of the logic control chip.
The invention also provides a power supply control method for controlling the power supply of the breathing machine, which comprises the following steps:
an output pin of the reset chip outputs a reset level signal to a third input pin of the logic control chip, the logic control chip receives the reset level signal and determines the initial state of the logic control chip when the logic control chip is normally powered on for the first time, and the initial state is an enable invalid level;
a first GPIO pin of the MCU chip outputs a high level signal, a second GPIO pin of the MCU chip outputs a pulse wave signal, the high level signal and the pulse wave signal are input to the logic control chip together, and the logic control chip outputs the high level signal to the power supply IC chip through an output pin of the logic control chip;
the power supply IC chip controls the conduction of the power supply of the breathing machine according to the received high-level signal;
a first GPIO pin of the MCU chip outputs a low level signal, a second GPIO pin of the MCU chip outputs a pulse wave signal, the low level signal and the pulse wave signal are input to the logic control chip together, and the logic control chip outputs the low level signal to the power supply IC chip through an output pin of the logic control chip;
and the power supply IC chip controls the power supply of the respirator to be switched off according to the received low-level signal.
Compared with the prior art, the invention has the beneficial effects that:
the power control circuit of the invention prevents the power failure phenomenon caused by the reset of the MCU chip by adding the logic control chip and the reset chip, and improves the operation stability of the whole circuit.
Drawings
Fig. 1 is a schematic connection diagram of a power control circuit for controlling the power supply of a ventilator according to the present invention.
Reference numerals:
p1, first GPIO pin P2 and second GPIO pin
P3, a first input pin P4, a second input pin
P5, output pin P6 of logic control chip, and enable control pin
P7, output pin P8 of reset chip, and third input pin
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
The invention provides a power supply control circuit for controlling a power supply of a breathing machine, which comprises an MCU chip, a logic control chip, a reset chip and a power supply IC chip which are mutually and electrically connected;
the MCU chip is used for generating a high-low level signal and a pulse wave signal and respectively inputting the high-low level signal and the pulse wave signal to the logic control chip;
the logic control chip is used for outputting a low level signal or a high level signal according to the received high and low level signal and the pulse wave signal and inputting the low level signal or the high level signal to an enabling control pin of the power supply IC chip;
the logic control chip is also used for determining the initial state of the logic control chip when the logic control chip is normally electrified for the first time according to the received reset level signal;
the power supply IC chip is used for controlling the on-off of the power supply of the breathing machine according to the received low level signal or high level signal;
the reset chip is used for generating a reset level signal during initial power-on and inputting the reset level signal to the logic control chip.
The first GPIO pin P1 and the second GPIO pin P2 of the MCU chip are respectively and correspondingly connected to a first input pin P3 and a second input pin P4 of the logic control chip, high and low level signals and corresponding pulse signals generated by the MCU chip are respectively input to the first input pin P3 and the second input pin P4 of the logic control chip through the first GPIO pin P1 and the second GPIO pin P2, and the state of the output pin P5 of the logic control chip is controlled together;
an output pin P5 of the logic control chip is connected to an enable control pin P6 of the power supply IC chip to control the on-off of the power supply of the respirator;
the output pin P7 of the reset chip is connected to the third input pin P8 of the logic control chip, so that the high level state of the logic control chip is guaranteed and the invalid level is enabled when the power is on.
By the mode, the power failure phenomenon caused by MCU reset can be effectively prevented.
The logic control chip is a D-type trigger with a logic control function; the reset chip is a chip with a reset function.
The invention also provides a power supply control method for controlling the power supply of the breathing machine, which comprises the following steps:
the output pin P7 of the reset chip outputs a reset level signal to the third input pin P8 of the logic control chip, the logic control chip receives the reset level signal and determines the initial state of the logic control chip when the logic control chip is normally powered on for the first time, and the initial state is an enable invalid level;
a first GPIO pin P1 of the MCU chip outputs a high level signal, a second GPIO pin P2 of the MCU chip outputs a pulse wave signal, the high level signal and the pulse wave signal are input to the logic control chip together, and the logic control chip outputs the high level signal to the power supply IC chip through an output pin P5 of the logic control chip;
the power supply IC chip controls the power supply of the breathing machine to be conducted according to the received high-level signal;
a first GPIO pin P1 of the MCU chip outputs a low level signal, a second GPIO pin P2 of the MCU chip outputs a pulse wave signal, the low level signal and the pulse wave signal are input to the logic control chip together, and the logic control chip outputs the low level signal to the power supply IC chip through an output pin P5 of the logic control chip;
and the power supply IC chip controls the power supply of the respirator to be switched off according to the received low-level signal.
The power control circuit of the invention adds a logic control chip, and the input end of the chip is simultaneously controlled by the high-low level signal output by the MCU and the output pulse wave signal, namely the output state needs the common control of two pins. The output pin of the logic control chip is connected to the enable control pin of the power supply IC chip so as to control the power supply of the power supply IC chip to be switched on and off; meanwhile, a reset chip is added to the logic control chip, so that the initial state of the logic control chip is determined when the respirator is normally powered on for the first time.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A power supply control circuit for controlling a power supply of a breathing machine is characterized by comprising an MCU chip, a logic control chip, a reset chip and a power supply IC chip which are mutually and electrically connected;
the MCU chip is used for generating a high-low level signal and a pulse wave signal and respectively inputting the high-low level signal and the pulse wave signal to the logic control chip;
the logic control chip is used for outputting a low level signal or a high level signal according to the received high and low level signal and the pulse wave signal and inputting the low level signal or the high level signal to an enabling control pin of the power supply IC chip;
the logic control chip is also used for determining the initial state of the logic control chip when the logic control chip is normally electrified for the first time according to the received reset level signal;
the power supply IC chip is used for controlling the on-off of the power supply of the breathing machine according to the received low level signal or high level signal;
the reset chip is used for generating a reset level signal during initial power-on and inputting the reset level signal to the logic control chip.
2. The power control circuit for controlling the power of a ventilator according to claim 1, wherein the first GPIO pin (P1) and the second GPIO pin (P2) of the MCU chip are respectively and correspondingly connected to the first input pin (P3) and the second input pin (P4) of the logic control chip, and the high-low level signal and the corresponding pulse signal generated by the MCU chip are respectively input to the first input pin (P3) and the second input pin (P4) of the logic control chip through the first GPIO pin (P1) and the second GPIO pin (P2), so as to commonly control the state of the output pin (P5) of the logic control chip;
an output pin (P5) of the logic control chip is connected to an enable control pin (P6) of the power supply IC chip to control the on-off of the power supply of the respirator.
3. The power control circuit for controlling the power of a ventilator according to claim 1, characterized in that the output pin (P7) of the reset chip is connected to the third input pin (P8) of the logic control chip.
4. A power control method for controlling a power supply of a ventilator, the method being implemented based on the power control circuit for controlling a power supply of a ventilator of claims 1 to 3, the method comprising:
an output pin (P7) of the reset chip outputs a reset level signal to a third input pin (P8) of the logic control chip, and the logic control chip receives the reset level signal and determines the initial state of the logic control chip when the logic control chip is normally powered on for the first time;
a first GPIO pin (P1) of the MCU chip outputs a high level signal, a second GPIO pin (P2) of the MCU chip outputs a pulse wave signal, the high level signal and the pulse wave signal are input to the logic control chip together, and the logic control chip outputs the high level signal to the power IC chip through an output pin (P5) of the logic control chip;
the power supply IC chip controls the conduction of the power supply of the breathing machine according to the received high-level signal;
a first GPIO pin (P1) of the MCU chip outputs a low level signal, a second GPIO pin (P2) of the MCU chip outputs a pulse wave signal, the low level signal and the pulse wave signal are input to the logic control chip together, and the logic control chip outputs the low level signal to the power IC chip through an output pin (P5) of the logic control chip;
and the power supply IC chip controls the power supply of the respirator to be switched off according to the received low-level signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011630702.XA CN112787494A (en) | 2020-12-31 | 2020-12-31 | Power supply control circuit and method for controlling power supply of breathing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011630702.XA CN112787494A (en) | 2020-12-31 | 2020-12-31 | Power supply control circuit and method for controlling power supply of breathing machine |
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| CN112787494A true CN112787494A (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011630702.XA Pending CN112787494A (en) | 2020-12-31 | 2020-12-31 | Power supply control circuit and method for controlling power supply of breathing machine |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135925A (en) * | 2007-09-25 | 2008-03-05 | 三一重工股份有限公司 | Control circuit of key pin of function chip and control method |
| CN105223858A (en) * | 2014-06-13 | 2016-01-06 | 深圳市双赢伟业科技股份有限公司 | A kind of switching on and shutting down control circuit of electronic equipment |
| CN210666687U (en) * | 2019-11-29 | 2020-06-02 | 苏州浪潮智能科技有限公司 | Key single-ended signal control system of server |
| CN111708308A (en) * | 2020-07-03 | 2020-09-25 | 迈普通信技术股份有限公司 | Single-board power supply control circuit and electronic equipment |
-
2020
- 2020-12-31 CN CN202011630702.XA patent/CN112787494A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135925A (en) * | 2007-09-25 | 2008-03-05 | 三一重工股份有限公司 | Control circuit of key pin of function chip and control method |
| CN105223858A (en) * | 2014-06-13 | 2016-01-06 | 深圳市双赢伟业科技股份有限公司 | A kind of switching on and shutting down control circuit of electronic equipment |
| CN210666687U (en) * | 2019-11-29 | 2020-06-02 | 苏州浪潮智能科技有限公司 | Key single-ended signal control system of server |
| CN111708308A (en) * | 2020-07-03 | 2020-09-25 | 迈普通信技术股份有限公司 | Single-board power supply control circuit and electronic equipment |
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Application publication date: 20210511 |
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