CN112165246B - Power supply chip self-restarting device, method and system - Google Patents
Power supply chip self-restarting device, method and system Download PDFInfo
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- CN112165246B CN112165246B CN202010851601.9A CN202010851601A CN112165246B CN 112165246 B CN112165246 B CN 112165246B CN 202010851601 A CN202010851601 A CN 202010851601A CN 112165246 B CN112165246 B CN 112165246B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims abstract description 56
- 238000012544 monitoring process Methods 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000006467 substitution reaction Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Classifications
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a power supply chip self-restarting device, method and system, comprising: the power supply chip and the restart control circuit; two ends of the power supply chip are respectively provided with an output mark end and an enabling end; the restart control circuit includes: the circuit comprises a first triode, a second triode, a first capacitor, a second capacitor and a charging resistor; the base electrode of the first triode is connected with the output mark end of the power supply chip, the collector electrode of the first triode is connected with a first capacitor, the first capacitor is connected with the base electrode of the second triode, the second capacitor is connected in parallel between the base electrode and the emitting electrode of the second triode, and the charging resistor is connected in parallel at two ends of the second capacitor; and the collector of the second triode is connected with the enabling end of the power supply chip. According to the invention, the restart control circuit is arranged on the periphery of the power supply chip, and then the enable signal of the trigger power supply changes from high to low, so that the normal state is delayed and recovered, and the automatic restart function of the power supply chip is realized.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a power supply chip self-restarting device, method and system.
Background
With the development of power supply technology, the requirement on the stability of the power supply is higher and higher, and if the system power supply does not have a restart function, huge loss is caused under the condition that the system is halted. In order to ensure the stability and safety of a power supply system, the recovery and restart of a power supply are very important, and some simple fault problems can be solved in a short time.
As shown in fig. 1, a problem that a power chip triggers automatic protection due to abnormal back-end load often occurs in a server or other electronic devices, and power supply can be resumed only by powering on again or restarting through an enable signal in order to lock the current power state
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a power chip self-restart apparatus, method and system to solve the above-mentioned technical problems.
In a first aspect, the present invention provides a self-restarting device for a power chip, comprising: the power supply chip and the restart control circuit; two ends of the power supply chip are respectively provided with an output mark end and an enabling end; the restart control circuit includes: the circuit comprises a first triode, a second triode, a first capacitor, a second capacitor and a charging resistor; the base electrode of the first triode is connected with the output mark end of the power supply chip, the collector electrode of the first triode is connected with a first capacitor, the first capacitor is connected with the base electrode of the second triode, the second capacitor is connected in parallel between the base electrode and the emitting electrode of the second triode, and the charging resistor is connected in parallel at two ends of the second capacitor; and the collector of the second triode is connected with the enabling end of the power supply chip.
Furthermore, the collector of the first triode is connected with a working voltage power supply; and the input end of the working voltage power supply is provided with a protective resistor.
Further, the output mark end is used for sending a mark signal for marking that the power supply of the power supply chip is normal; the enabling terminal is used for receiving an enabling signal for controlling the restart of the power supply; the working voltage of the output mark end and the working voltage of the enable end are both 3.3V.
Further, the output flag terminal is a Power good pin, and the enable terminal is a Power enable pin.
Further, the emitter of the first triode and the emitter of the second triode are respectively grounded.
In a second aspect, the present invention provides a self-restarting method for a power chip, including:
step 2, the first capacitor charges the second capacitor, the voltage of the second capacitor is changed from low level to high level, and the second triode is conducted to enable the enable signal to be changed from high level to low level;
step 3, when the potential of one end of the first capacitor, which is connected with the first triode, reaches the working voltage, the change is stopped, the first capacitor stops charging the second capacitor, and the second capacitor is completely discharged through the charging resistor;
and 4, switching on the second triode into off, changing the enable signal from low level to high level, and restarting the power supply chip through the enable signal.
Further, the method further comprises:
and performing fault simulation, testing the power-on and power-off time sequence of the power chip, and acquiring the power-on and power-off conditions of the input end, the output mark end and the enable end of the power chip, which change along with time.
In a third aspect, the present invention provides a power chip self-restarting system, including: the system comprises a fault monitoring circuit, a delay control circuit, a charging and discharging circuit and a restarting circuit; the fault monitoring circuit is connected with the power chip, the delay control circuit is connected with the fault monitoring circuit, the charge and discharge circuit is connected with the delay control circuit, the restart circuit is connected with the delay control circuit, and the restart circuit is connected with the power chip;
the fault monitoring circuit is used for monitoring a fault power-off signal of the power supply chip;
the delay control circuit is used for controlling the charging and discharging circuit to charge and discharge;
the charge and discharge circuit is used for realizing a delay effect through charge and discharge;
the restarting circuit is used for sending a signal to control the restarting of the power supply chip.
The beneficial effect of the invention is that,
according to the self-restarting device, method and system for the Power chip, the restarting control circuit is arranged on the periphery of the Power chip, the Power good pin is used for detecting the Power failure condition, then the enabling signal of the Power is triggered to change from high to low, the normal recovery is delayed, the automatic restarting function of the Power chip is realized, and the stability of the Power supply of the server is improved.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power chip according to the prior art.
Fig. 2 is a timing diagram of power-up and power-down of each interface terminal after the power chip of the prior art fails.
Fig. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
Fig. 4 is a timing diagram of power up and down of each interface terminal after a power chip fails according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a system according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
As shown in fig. 3, the present embodiment provides a power chip self-restarting device, including: the power supply chip and the restart control circuit; two ends of the power supply chip are respectively provided with an output mark end and an enabling end; the output mark end is used for sending a mark signal for marking normal power supply of the power supply chip; the enabling terminal is used for receiving an enabling signal for controlling the restart of the power supply; the working voltages of the output mark end and the enable end are both 3.3V; the output mark end is a Power good pin, and the enable end is a Power enable pin;
the restart control circuit includes: the circuit comprises a first triode Q1, a second triode Q2, a first capacitor C1, a second capacitor C2 and a charging resistor R1; the base electrode of the first triode Q1 is connected with the output flag end of the power chip, the collector electrode of the first triode Q1 is connected with a first capacitor C1, the first capacitor C1 is connected with the base electrode of the second triode Q2, the second capacitor C2 is connected between the base electrode and the emitter electrode of the second triode Q2 in parallel, and the charging resistor R2 is connected at two ends of the second capacitor C2 in parallel; the collector of the second triode Q2 is connected with the enable end of the power supply chip; the collector of the first triode is connected with a working voltage power supply with + 3.3V; the input end of the working voltage power supply is provided with a protective resistor R1; and the emitting electrode of the first triode and the emitting electrode of the second triode are respectively grounded.
When a fault occurs, the Power good pin becomes low level and is transmitted to the base of the first triode Q1 to be disconnected, the first capacitor C1 charges the second capacitor C2, the voltage of the second capacitor C2 becomes high level after charging and is transmitted to the base of the second triode Q2, the second triode Q2 is caused to be conducted, and therefore the enabling signal becomes low level from high level; when the potential of the end of the first capacitor C1 connected with the first triode Q1 reaches 3.3V, the first capacitor C1 stops charging the second capacitor C2, and the second capacitor C2 is completely discharged through the charging resistor R2; after the discharging is finished, the voltages at the two ends are changed into low level, so that the second triode Q2 is turned off from on, the enable signal is changed from low level to high level, and the power supply chip is restarted through the enable signal.
In a third aspect, the present invention provides a power chip self-restarting system, including: the system comprises a fault monitoring circuit, a delay control circuit, a charging and discharging circuit and a restarting circuit;
the fault monitoring circuit is used for monitoring a fault power-off signal of the power supply chip;
the delay control circuit is used for controlling the charging and discharging circuit to charge and discharge;
the charge and discharge circuit is used for realizing a delay effect through charge and discharge;
the restarting circuit is used for sending a signal to control the restarting of the power supply chip.
In addition, the present embodiment further provides a power chip self-restarting method using the above power chip self-restarting device as an execution main body:
after the power chip works, the input end is electrified, the enabling end acquires working voltage to be electrified, the output end starts to output electric quantity, and the pin of the output mark end sends a signal of normal power supply after the power supply chip works normally;
step 2, the first capacitor C1 charges the second capacitor C2, the voltage of the second capacitor C2 changes from low level to high level, the second triode Q2 is conducted to enable the enable signal to change from high level to low level;
step 3, when the potential of the end, connected with the first triode Q1, of the first capacitor C1 stops changing when the potential reaches the working voltage, the first capacitor C1 stops charging the second capacitor C2, and the second capacitor C2 completely discharges through the charging resistor R2;
and 4, switching on the second triode Q2 into off, changing the enable signal from low level to high level, and restarting the power supply chip through the enable signal.
Carrying out fault simulation, testing the power-on and power-off time sequence of the power chip, obtaining the power-on and power-off condition of the input end, the output mark end and the enabling end of the power chip changing along with time, wherein the power-on and power-off condition before the restart is recovered is shown in fig. 2, in the embodiment:
as shown in fig. 4, after the power chip operates, the input terminal, the enable terminal, the output terminal, and the output flag terminal are sequentially powered on, after a fault is injected, the output terminal is immediately powered off, then the output flag terminal is powered off, the enable terminal is powered off in the process after the capacitor is charged, the enable terminal is powered on in the process of power discharge, and then the output terminal and the output flag terminal are sequentially powered on.
As shown in fig. 5, an embodiment of the present invention further provides a power chip self-reboot system, including: the system comprises a fault monitoring circuit, a delay control circuit, a charging and discharging circuit and a restarting circuit; the fault monitoring circuit is connected with the power chip, the delay control circuit is connected with the fault monitoring circuit, the charge and discharge circuit is connected with the delay control circuit, the restart circuit is connected with the delay control circuit, and the restart circuit is connected with the power chip;
the fault monitoring circuit is used for monitoring a fault power-off signal of the power supply chip;
the delay control circuit is used for controlling the charging and discharging circuit to charge and discharge;
the charge and discharge circuit is used for realizing a delay effect through charge and discharge;
the restarting circuit is used for sending a signal to control the restarting of the power supply chip.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a power chip is from starting drive which characterized in that includes: the power supply chip and the restart control circuit; two ends of the power supply chip are respectively provided with an output mark end and an enabling end; the restart control circuit includes: the circuit comprises a first triode, a second triode, a first capacitor, a second capacitor and a charging resistor; the base electrode of the first triode is connected with the output mark end of the power supply chip, the collector electrode of the first triode is connected with a first capacitor, the first capacitor is connected with the base electrode of the second triode, the second capacitor is connected in parallel between the base electrode and the emitting electrode of the second triode, and the charging resistor is connected in parallel at two ends of the second capacitor; and the collector of the second triode is connected with the enabling end of the power supply chip.
2. The power supply chip self-restarting device according to claim 1, wherein a collector of the first triode is connected with a working voltage power supply; and the input end of the working voltage power supply is provided with a protective resistor.
3. The self-restarting device of a power chip of claim 1, wherein the output flag terminal is used for sending a flag signal for marking normal power supply of the power chip; the enabling terminal is used for receiving an enabling signal for controlling the restart of the power supply; the working voltage of the output mark end and the working voltage of the enable end are both 3.3V.
4. The self-reset device of claim 3, wherein the output flag terminal is a Power good pin, and the enable terminal is a Power enable pin.
5. The power chip self-restarting device according to claim 1, wherein an emitter of the first transistor and an emitter of the second transistor are grounded, respectively.
6. A self-restarting method of a power supply chip is characterized by comprising the following steps:
step 1, when a fault occurs, the voltage of an output mark end is changed from a high level to a low level, a first triode is changed from a conduction state to a disconnection state, and the potential of one end of a first capacitor, which is connected with the first triode, is changed from a low level to a high level;
step 2, the first capacitor charges the second capacitor, the voltage of the second capacitor is changed from low level to high level, and the second triode is conducted to enable the enable signal to be changed from high level to low level;
step 3, when the potential of one end of the first capacitor, which is connected with the first triode, reaches the working voltage, the change is stopped, the first capacitor stops charging the second capacitor, and the second capacitor is completely discharged through the charging resistor;
and 4, switching on the second triode into off, changing the enable signal from low level to high level, and restarting the power supply chip through the enable signal.
7. The power chip self-restarting method according to claim 6, wherein the method further comprises:
and performing fault simulation, testing the power-on and power-off time sequence of the power chip, and acquiring the power-on and power-off conditions of the input end, the output mark end and the enable end of the power chip, which change along with time.
8. A power chip self-restarting system is characterized by comprising: the system comprises a fault monitoring circuit, a delay control circuit, a charging and discharging circuit and a restarting circuit; the fault monitoring circuit is connected with the power chip, the delay control circuit is connected with the fault monitoring circuit, the charge and discharge circuit is connected with the delay control circuit, the restart circuit is connected with the delay control circuit, and the restart circuit is connected with the power chip;
the fault monitoring circuit is used for monitoring a fault power-off signal of the power supply chip;
the delay control circuit is used for controlling the charging and discharging circuit to charge and discharge;
the charge and discharge circuit is used for realizing a delay effect through charge and discharge;
the restarting circuit is used for sending a signal to control the restarting of the power supply chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010851601.9A CN112165246B (en) | 2020-08-21 | 2020-08-21 | Power supply chip self-restarting device, method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010851601.9A CN112165246B (en) | 2020-08-21 | 2020-08-21 | Power supply chip self-restarting device, method and system |
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| CN112165246A CN112165246A (en) | 2021-01-01 |
| CN112165246B true CN112165246B (en) | 2022-02-18 |
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| CN202010851601.9A Active CN112165246B (en) | 2020-08-21 | 2020-08-21 | Power supply chip self-restarting device, method and system |
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| CN113341827A (en) * | 2021-06-18 | 2021-09-03 | 南昌华勤电子科技有限公司 | Control method and device of power supply chip |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324916A (en) * | 2011-06-15 | 2012-01-18 | 杭州炬华科技股份有限公司 | Multiple-power-supply reset circuit |
| CN207752370U (en) * | 2018-02-07 | 2018-08-21 | 威胜电气有限公司 | Reset circuit and measuring instrument including the reset circuit |
| CN208316365U (en) * | 2018-06-27 | 2019-01-01 | 深圳市汇川技术股份有限公司 | A kind of power down time extends circuit and power control circuit |
| CN209057188U (en) * | 2018-12-24 | 2019-07-02 | 优数通（北京）科技有限公司 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
| CN210899110U (en) * | 2019-09-12 | 2020-06-30 | 广州邦讯信息系统有限公司 | Automatic and passive power-off restarting circuit of microcontroller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109194317B (en) * | 2018-09-05 | 2022-08-16 | 潍坊歌尔电子有限公司 | Reset circuit and wearable equipment |
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2020
- 2020-08-21 CN CN202010851601.9A patent/CN112165246B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102324916A (en) * | 2011-06-15 | 2012-01-18 | 杭州炬华科技股份有限公司 | Multiple-power-supply reset circuit |
| CN207752370U (en) * | 2018-02-07 | 2018-08-21 | 威胜电气有限公司 | Reset circuit and measuring instrument including the reset circuit |
| CN208316365U (en) * | 2018-06-27 | 2019-01-01 | 深圳市汇川技术股份有限公司 | A kind of power down time extends circuit and power control circuit |
| CN209057188U (en) * | 2018-12-24 | 2019-07-02 | 优数通（北京）科技有限公司 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
| CN210899110U (en) * | 2019-09-12 | 2020-06-30 | 广州邦讯信息系统有限公司 | Automatic and passive power-off restarting circuit of microcontroller |
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