CN111766933B - Power supply protection circuit and electronic device with same - Google Patents
Power supply protection circuit and electronic device with same Download PDFInfo
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- CN111766933B CN111766933B CN201910262878.5A CN201910262878A CN111766933B CN 111766933 B CN111766933 B CN 111766933B CN 201910262878 A CN201910262878 A CN 201910262878A CN 111766933 B CN111766933 B CN 111766933B
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- protection circuit
- driving voltage
- power supply
- control
- voltage
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/30—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations
- G06F1/305—Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations in the event of power-supply fluctuations
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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
- H02H3/08—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 responsive to excess current
- H02H3/10—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 responsive to excess current additionally responsive to some other abnormal electrical conditions
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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
- H02H3/20—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 responsive to excess voltage
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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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The power supply protection circuit is electrically connected between the power supply module and the hard disk. The power module provides a first driving voltage and a second driving voltage. The power supply protection circuit comprises a first protection circuit, a second protection circuit and a control module. The first protection circuit detects whether the first driving voltage is abnormal. The second protection circuit detects whether the second driving voltage is abnormal. The control module outputs a first control signal when at least one of the first protection circuit and the second protection circuit detects that the first driving voltage and/or the second driving voltage are abnormal. The first protection circuit stops supplying the first driving voltage to the hard disk according to the first control signal, and the second protection circuit stops supplying the second driving voltage to the hard disk according to the first control signal. The invention also provides an electronic device with the power supply protection circuit.
Description
Technical Field
The invention relates to a power supply protection circuit and an electronic device with the same.
Background
Electronic devices, such as notebook computers, generally include a power module, a hard disk, a motherboard, and a plurality of electronic devices disposed on the motherboard. The hard disk is powered on according to the power supply of the power module, and occupies an important position in the electronic equipment. In the prior art, when the electronic equipment is started, transient high voltage is generated, which may cause abnormal power supply of the hard disk, and damage to the hard disk or incapability of starting the system.
Disclosure of Invention
In view of this, it is necessary to provide a power supply protection circuit that prevents transient high voltage from striking the hard disk.
It is also necessary to provide a power supply protection circuit that prevents transient high voltage from striking the hard disk.
A power supply protection circuit is electrically connected between a power module and a hard disk. The power module provides a first driving voltage and a second driving voltage. The power supply protection circuit includes:
the first protection circuit receives the first driving voltage and is electrically connected with the hard disk; the first protection circuit detects whether the first driving voltage is abnormal;
the second protection circuit receives a second driving voltage and is electrically connected with the hard disk; the second protection circuit detects whether the second driving voltage is abnormal;
the control module is electrically connected with the first protection circuit and the second protection circuit, and outputs a first control signal when at least one of the first protection circuit and the second protection circuit detects that the first driving voltage and/or the second driving voltage are abnormal; the first protection circuit stops supplying the first driving voltage to the hard disk according to the first control signal, and the second protection circuit stops supplying the second driving voltage to the hard disk according to the first control signal.
An electronic device comprises a power module, a hard disk and a power supply protection circuit connected between the power module and the hard disk. The power module provides a first driving voltage and a second driving voltage. The power supply protection circuit includes:
the first protection circuit receives the first driving voltage and is electrically connected with the hard disk; the first protection circuit detects whether the first driving voltage is abnormal;
the second protection circuit receives a second driving voltage and is electrically connected with the hard disk; the second protection circuit detects whether the second driving voltage is abnormal;
the control module is electrically connected with the first protection circuit and the second protection circuit, and outputs a first control signal when at least one of the first protection circuit and the second protection circuit detects that the first driving voltage and/or the second driving voltage are abnormal; the first protection circuit stops supplying the first driving voltage to the hard disk according to the first control signal, and the second protection circuit stops supplying the second driving voltage to the hard disk according to the first control signal.
According to the power supply protection circuit and the electronic device, the first driving voltage and the second driving voltage which are provided for the hard disk can be detected, and when at least one of the first driving voltage and the second driving voltage is abnormal, the first driving voltage and the second driving voltage are stopped being provided for the hard disk, so that the hard disk is prevented from being impacted by transient high voltage, the hard disk is protected, and the running stability of the electronic device can be improved.
Drawings
Fig. 1 is a schematic block diagram of a power supply protection circuit applied to an electronic device according to a preferred embodiment of the invention.
Fig. 2 is a circuit diagram of the power supply protection circuit shown in fig. 1.
Description of the main reference signs
Electronic device 100
Power supply module 1
Power supply protection circuit 2
Hard disk 4
First protection circuit 21
Second protection circuit 23
Control module 25
First driving voltage V1
Second driving voltage V2
Operating voltage V3
First power supply pin P1
Second power supply pin P2
First control transistor Q1
First sense chip 211
First resistor R1
First capacitor C1
First voltage dividing resistor R2
Second voltage-dividing resistor R3
First input pin P3
First output pin P4
First enable pin P5
First feedback pin P6
Second control transistor Q2
Second sense chip 231
Second resistor R4
Second capacitor C2
Third voltage dividing resistor R5
Fourth voltage dividing resistor R6
Second input pin P7
Second output pin P8
Second enable pin P9
Second feedback pin P10
Control chip 251
First connecting pin P11
Second connection pin P12
Third output pin P13
Third enable pin P14
Fifth voltage dividing resistor R7
Sixth voltage dividing resistor R8
Third resistor R9
Fourth resistor R10
Third capacitor C3
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In describing embodiments of the present invention, it should be noted that the term "coupled" should be interpreted broadly, unless otherwise indicated and limited thereto, such as being either fixedly coupled, detachably coupled, or integrally coupled; can be mechanically connected, electrically connected or can be communicated with each other; either directly or indirectly, through intervening elements may be in communication or in an interactive relationship between the two elements. It will be apparent to those skilled in the art that the specific meaning of the terms described above in the present invention may be set forth immediately according to circumstances.
The terms first, second, third and the like in the description and in the claims of the invention and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the term "include" and any variations thereof is intended to cover a non-exclusive inclusion.
The following describes specific embodiments of the electronic device according to the present invention with reference to the drawings.
Fig. 1 is a schematic block diagram illustrating an electronic device 100 according to an embodiment of the invention. The electronic device 100 is an electronic device with a hard disk, such as a notebook computer, a mobile phone, an intelligent wearable device, a portable computer, but not limited thereto. The electronic device can cut off the power supply of the hard disk when overvoltage condition occurs in the voltage for providing the hard disk. The electronic device 100 includes a power module 1, a power supply protection circuit 2, and a hard disk 4. In other embodiments, the electronic device 100 may further include other electronic components such as a motherboard, a processor, a memory, a connector, and an optical drive, but is not limited thereto.
The power supply module 1 may provide different voltages to different modules. In at least one embodiment of the present invention, the power module 1 provides a first driving voltage V1, a second driving voltage V2, and an operating voltage V3. In at least one embodiment of the invention, the working voltage V3 is 3.3V, the first driving voltage V1 is 5V, and the second driving voltage is 12V. In other embodiments, the magnitudes of the first driving voltage V1, the second driving voltage V2, and the operating voltage V3 may be adjusted according to the requirements.
The power supply protection circuit 2 is connected between the power module 1 and the hard disk 4, and is configured to supply the first driving voltage V1 and the second driving voltage V2 provided by the power module 1 to the first power supply pin P1 and the second power supply pin P2 of the hard disk 4, respectively, and stop supplying the first driving voltage V1 and the second driving voltage V2 to the first power supply pin P1 and the second power supply pin P2 when at least one of the first driving voltage V1 and the second driving voltage V2 is abnormal. In at least one embodiment of the present invention, the abnormality refers to an overvoltage or overcurrent of the first or second driving voltage V1 or V2.
The power supply protection circuit 2 includes a first protection circuit 21, a second protection circuit 23, and a control module 25.
The first protection circuit 21 receives the first driving voltage V1, and is configured to detect whether the first driving voltage V1 is abnormal and output a first feedback signal to the control module 25. The first feedback signal is switchable between a high level and a low level. When the first driving voltage V1 is abnormal, the first feedback signal is at a low level; when the first driving voltage V1 is normal, the first feedback signal is at a high level.
Referring to fig. 2, the first protection circuit 21 includes a first control transistor Q1, a first sensing chip 211, a first resistor R1, a first capacitor C1, a first voltage dividing resistor R2, and a second voltage dividing resistor R3. The first sensing chip 211 has a first input pin P3, a first output pin P4, a first enable pin P5, and a first feedback pin P6. The gate of the first control transistor Q1 is electrically connected to the control module 25, the source of the first control transistor Q1 receives the first driving voltage V1, and the drain of the first control transistor Q1 is electrically connected to the first input pin P3. One end of the first resistor R1 is electrically connected to the drain of the first control transistor Q1, and the other end is grounded. One end of the first capacitor C1 is electrically connected to the drain of the first control transistor Q1, and the other end is grounded. The first output pin P4 is electrically connected to the first power supply pin P1 of the hard disk 4. The first enable pin P5 receives a first enable signal EM1 from a central processing unit (not shown). One end of the first voltage dividing resistor R2 receives the first driving voltage V1, and the other end is grounded through the second voltage dividing resistor R3. The first feedback pin P6 is electrically connected between the first voltage dividing resistor R2 and the second voltage dividing resistor R3, and is electrically connected with the control module 25. In this embodiment, the first control transistor Q1 is a P-type transistor.
The second protection circuit 23 receives the first driving voltage V1 and the second driving voltage V2, and is configured to detect whether the second driving voltage V2 is abnormal or not and output a second feedback signal to the control module 25. The second feedback signal is switchable between a high level and a low level. When the second driving voltage V2 is abnormal, the second feedback signal is at a low level; the second feedback signal is at a high level when the second driving voltage V2 is normal.
The second protection circuit 23 includes a second control transistor Q2, a second sensing chip 231, a second resistor R4, a second capacitor C2, a third voltage dividing resistor R5, and a fourth voltage dividing resistor R6. The second sensing chip 231 has a second input pin P7, a second output pin P8, a second enable pin P9, and a second feedback pin P10. The gate of the second control transistor Q2 is electrically connected to the control module 25, the source of the second control transistor Q2 receives the second driving voltage V2, and the drain of the second control transistor Q2 is electrically connected to the second input pin P7. One end of the second resistor R4 is electrically connected to the drain of the second control transistor Q2, and the other end is grounded. One end of the second capacitor C2 is electrically connected to the drain of the second control transistor Q2, and the other end is grounded. The second output pin P8 is electrically connected to the second power supply pin P2 of the hard disk 4. The second enable pin P9 receives a second enable signal EM2 from a central processing unit (not shown). One end of the third voltage dividing resistor R5 receives the first driving voltage V1, and the other end is grounded through the fourth voltage dividing resistor R6. The second feedback pin P10 is electrically connected between the third voltage dividing resistor R5 and the fourth voltage dividing resistor R6, and is electrically connected with the control module 25. In this embodiment, the second control transistor Q2 is a P-type transistor.
The control module 25 receives the working voltage V3 and the second driving voltage V2, and is electrically connected to the first protection circuit 21 and the second protection circuit 23. The control module 25 is configured to perform a logical and operation according to the first feedback signal and the second feedback signal and output a control signal to the first protection circuit 21 and the second protection circuit 23. When the first feedback signal and the second feedback signal are both at the high level, the control module 25 outputs a first control signal to control the first protection circuit 21 to output the first driving voltage V1 and control the second protection circuit 23 to output the second driving voltage V2. When either one of the first feedback signal and the second feedback signal is at a low level, the control module 25 outputs a second control signal to control the first protection circuit 21 and the second protection circuit 23 to stop operating.
The control module 25 includes a control chip 251, a switching transistor Q3, a third capacitor C3, a fifth voltage dividing resistor R7, a sixth voltage dividing resistor R8, a third resistor R9, and a fourth resistor R10. The control chip 251 includes a first connection pin P11, a second connection pin P12, a third output pin P13, and a third enable pin P14. In this embodiment, the control chip 251 is a logic and gate. The first connection pin P11 is electrically connected to the first feedback pin P6, and the second connection pin P12 is electrically connected to the second feedback pin P10. The third output pin P13 is connected between the fifth voltage dividing resistor R7 and the sixth voltage dividing resistor R8, and is electrically connected to the gate of the switching transistor Q3. The third enable pin P14 receives a third enable signal EM3 of a central processing unit (not shown). One end of the fifth voltage dividing resistor R7 receives the working voltage V3, and the other end is grounded through the sixth voltage dividing resistor R8. The source of the switching transistor Q3 receives the second driving voltage V2 through a third resistor R9, and the drain of the switching transistor Q3 is grounded. The fourth resistor R10 is connected in series between the source of the switching transistor Q3 and the gate of the first control transistor Q1. The gate of the second control transistor Q2 is electrically connected to the source of the switching transistor Q3 through the fourth resistor R10. One end of the third capacitor C3 is connected between the gate of the first control transistor Q1 and the fourth resistor R10, and the other end is grounded. In this embodiment, the switching transistor Q3 is an N-type transistor.
The working principle of the power supply protection circuit 2 is as follows:
at the time of powering up the electronic device 100, the first driving voltage V1 is input to the first input pin P3 of the first sensing chip 211 through the first control transistor Q1. The second driving voltage V2 is input to the second input pin P7 of the second sensing chip 231 through the second control transistor Q2.
The first feedback pin P6 outputs the first feedback signal at a low level when the first driving voltage V1 is detected to be abnormal by the first sensing chip 211. The second feedback pin P10 outputs the second feedback signal at a low level when the second sensing chip 231 detects that the second driving voltage V2 is abnormal.
The third output pin P13 outputs the first control signal when at least one of the first feedback signal and the second feedback signal is at a low level. The switching transistor Q3 is turned off according to the first control signal. Since the switching transistor Q3 is turned off, the gates of the first control transistor Q1 and the second control transistor Q2 are pulled up to a high level according to the second driving voltage V2, and the first control transistor Q1 and the second control transistor Q2 are turned off at the same time, thereby stopping outputting the first driving voltage V1 to the first sensing chip 211 and stopping outputting the second driving voltage V2 to the second sensing chip 231. At this time, the first output pin P4 stops supplying the first driving voltage V1 to the first power supply pin P1, and the second output pin P8 stops supplying the second driving voltage V2 to the second power supply pin P2.
The first feedback pin P6 outputs the first feedback signal at a high level when the first sensing chip 211 detects that the first driving voltage V1 is normal. The second feedback pin P10 outputs the second feedback signal at a high level when the second sensing chip 231 detects that the second driving voltage V2 is normal.
The third output pin P13 outputs the second control signal when both the first feedback signal and the second feedback signal are at a high level. The switching transistor Q3 is turned on according to the second control signal. Since the switching transistor Q3 is turned on, the gates of the first control transistor Q1 and the second control transistor Q2 are pulled down to a low level, and the first control transistor Q1 and the second control transistor Q2 are turned on simultaneously, thereby outputting the first driving voltage V1 to the first sensing chip 211 and outputting the second driving voltage V2 to the second sensing chip 231. At this time, the first output pin P4 supplies the first driving voltage V1 to the first power supply pin P1, and the second output pin P8 stops supplying the second driving voltage V2 to the second power supply pin P2.
The electronic device 100 with the power supply protection circuit 2 can prevent the transient high voltage from striking the hard disk, realize the hard disk protection, and improve the operation stability of the electronic device 100 by detecting the first driving voltage V1 and the second driving voltage V2 provided to the hard disk and stopping providing the first driving voltage V1 and the second driving voltage V2 to the hard disk when at least one of the two is abnormal.
It will be appreciated by persons skilled in the art that the above embodiments have been provided for the purpose of illustrating the invention and are not to be construed as limiting the invention, and that suitable modifications and variations of the above embodiments are within the scope of the invention as claimed.
Claims (9)
1. The power supply protection circuit is electrically connected between the power supply module and the hard disk; the power supply module provides a first driving voltage and a second driving voltage; the method is characterized in that: the power supply protection circuit includes:
the first protection circuit receives the first driving voltage and is electrically connected with the hard disk; the first protection circuit detects whether the first driving voltage is abnormal or not and outputs a first feedback signal;
the second protection circuit receives the second driving voltage and is electrically connected with the hard disk; the second protection circuit detects whether the second driving voltage is abnormal or not and outputs a second feedback signal;
the control module is electrically connected with the first protection circuit and the second protection circuit, and when at least one of the first protection circuit and the second protection circuit detects that the first driving voltage and/or the second driving voltage are abnormal, the control module outputs a first control signal according to the first feedback signal which is output by the first protection circuit and is in a low level and/or the second feedback signal which is output by the second protection circuit and is in a low level; the first protection circuit stops supplying the first driving voltage to the hard disk according to the first control signal, and the second protection circuit stops supplying the second driving voltage to the hard disk according to the first control signal;
the first protection circuit comprises a first control transistor and a first sensing chip; the grid electrode of the first control transistor is electrically connected with the control module, the source electrode of the first control transistor receives the first driving voltage, and the drain electrode of the first control transistor is electrically connected with the first input pin of the first sensing chip, so that the first driving voltage is provided for the first sensing chip when the control module controls the first control transistor to be conducted; the second protection circuit comprises a second control transistor and a second sensing chip; the grid electrode of the second control transistor is electrically connected with the control module, the source electrode of the second control transistor receives the second driving voltage, and the drain electrode of the second control transistor is electrically connected with the second input pin of the second sensing chip, so that the second driving voltage is provided for the first sensing chip when the control module controls the second control transistor to be conducted; the first sensing chip is used for sensing whether the first driving voltage is abnormal or not and outputting the first feedback signal to the control module; the second sensing chip is used for sensing whether the second driving voltage is abnormal or not and outputting the second feedback signal to the control module.
2. The power supply protection circuit of claim 1, wherein: when the first protection circuit detects that the first driving voltage is normal and the second protection circuit detects that the second driving voltage is normal, the control module outputs a second control signal; the first protection circuit provides the first driving voltage to the hard disk according to the second control signal, and the second protection circuit provides the second driving voltage to the hard disk according to the second control signal.
3. The power supply protection circuit of claim 2, wherein: when the gates of the first control transistor and the second control transistor receive the first control signal, the first control transistor and the second control transistor are turned off, the first sensing chip stops outputting the first driving voltage to a first power supply pin of the hard disk, and the second sensing chip stops outputting the second driving voltage to a second power supply pin of the hard disk; when the gates of the first control transistor and the second control transistor receive the second control signal, the first control transistor and the second control transistor are turned on, the first sensing chip outputs the first driving voltage to a first power supply pin of the hard disk, and the second sensing chip outputs the second driving voltage to a second power supply pin of the hard disk.
4. A power supply protection circuit as claimed in claim 3, characterized in that: the first sensing chip is provided with a first feedback pin; the second sensing chip is provided with a second feedback pin; when the first sensing chip detects that the first driving voltage is abnormal, the first feedback pin outputs the first feedback signal at a low level to the control module; when the second sensing chip detects that the second driving voltage is abnormal, the second feedback pin outputs the second feedback signal at a low level to the control module.
5. The power supply protection circuit of claim 4, wherein: the first protection circuit further comprises a first voltage dividing resistor and a second voltage dividing resistor; the second protection circuit further comprises a third voltage dividing resistor and a fourth voltage dividing resistor; one end of the first voltage dividing resistor receives the first driving voltage, the other end of the first voltage dividing resistor is grounded through the second voltage dividing resistor, and the first feedback pin is electrically connected between the first voltage dividing resistor and the second voltage dividing resistor and is electrically connected with the control module; one end of the third voltage dividing resistor receives the first driving voltage, the other end of the third voltage dividing resistor is grounded through the fourth voltage dividing resistor, and the second feedback pin is electrically connected between the third voltage dividing resistor and the fourth voltage dividing resistor and is electrically connected with the control module; when the first sensing chip detects that the first driving voltage is normal, the first feedback pin is pulled up to be at a high level according to the voltage division on the second voltage division resistor so as to output the first feedback signal at the high level to the control module; and when the second sensing chip detects that the second driving voltage is normal, the second feedback pin is pulled up to be at a high level according to the voltage division on the fourth voltage division resistor so as to output the second feedback signal at the high level to the control module.
6. A power supply protection circuit as claimed in claim 3, characterized in that: the control module comprises a control chip and a switching transistor; the control chip is electrically connected with the first protection circuit and the second protection circuit; the third output pin of the control chip is electrically connected with the grid electrode of the switching transistor; the source electrode of the switching transistor is grounded, and the drain electrode of the switching transistor receives a second driving voltage; the grid electrode of the first control transistor and the grid electrode of the second control transistor are electrically connected with the drain electrode of the switch transistor; when at least one of the first protection circuit and the second protection circuit detects that the first driving voltage and/or the second driving voltage are abnormal, the third output pin controls the switch transistor to be turned off so as to output the first control signal; the first control transistor and the second control transistor are turned off according to the first control signal, the first sensing chip stops outputting the first driving voltage to the first power supply pin of the hard disk, and the second sensing chip stops outputting the second driving voltage to the second power supply pin of the hard disk.
7. The power supply protection circuit of claim 6, wherein: the control module further comprises a fifth voltage dividing resistor and a sixth voltage dividing resistor; one end of the fifth voltage dividing resistor receives the working voltage, and the other end of the fifth voltage dividing resistor is grounded through the sixth voltage dividing resistor; the third output pin of the control chip is connected between the fifth voltage dividing resistor and the sixth voltage dividing resistor; when the first protection circuit detects that the first driving voltage is normal and the second protection circuit detects that the second driving voltage is normal, the switch transistor is conducted according to the voltage division on the sixth voltage division resistor so as to output the second control signal, the first control transistor and the second control transistor are conducted according to the second control signal, the first sensing chip outputs the first driving voltage to the first power supply pin of the hard disk, and the second sensing chip outputs the second driving voltage to the second power supply pin of the hard disk.
8. The power supply protection circuit of claim 6, wherein: the control chip is a logic AND gate.
9. An electronic device comprises a power module, a hard disk and a power supply protection circuit connected between the power module and the hard disk; the power supply module provides a first driving voltage and a second driving voltage; the method is characterized in that: the power supply protection circuit employs the power supply protection circuit as claimed in any one of claims 1 to 8.
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| CN201910262878.5A CN111766933B (en) | 2019-04-02 | 2019-04-02 | Power supply protection circuit and electronic device with same |
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| CN111766933B true CN111766933B (en) | 2023-08-15 |
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| CN113824106A (en) * | 2021-08-23 | 2021-12-21 | 深圳市联洲国际技术有限公司 | Hard disk power supply protection circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208204A (en) * | 2011-05-25 | 2011-10-05 | 深圳宝德科技集团股份有限公司 | Method and device for detecting hard disks |
| CN102213972A (en) * | 2010-04-02 | 2011-10-12 | 鸿富锦精密工业（深圳）有限公司 | Computer main board and SATA (serial advanced technology attachment) hard disk power supply circuit thereof |
| CN103473155A (en) * | 2013-08-29 | 2013-12-25 | 杭州华为数字技术有限公司 | Power device, storage unit and power module |
| CN103984604A (en) * | 2014-05-23 | 2014-08-13 | 环旭电子股份有限公司 | Control device |
| CN105354515A (en) * | 2015-12-09 | 2016-02-24 | 浪潮电子信息产业股份有限公司 | Hard disk backboard protection method |
| CN105426287A (en) * | 2015-11-09 | 2016-03-23 | 浪潮电子信息产业股份有限公司 | Method for realizing stability operation detection of magnetic disc by utilizing back plate voltage monitoring function |
| CN107294199A (en) * | 2017-06-27 | 2017-10-24 | 合肥尚硕新能源有限公司 | A kind of compound voltage detecting switching circuit of logic |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI656722B (en) * | 2017-04-28 | 2019-04-11 | 偉詮電子股份有限公司 | High voltage charging control method, power controller, and power supply |
-
2019
- 2019-04-02 CN CN201910262878.5A patent/CN111766933B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213972A (en) * | 2010-04-02 | 2011-10-12 | 鸿富锦精密工业（深圳）有限公司 | Computer main board and SATA (serial advanced technology attachment) hard disk power supply circuit thereof |
| CN102208204A (en) * | 2011-05-25 | 2011-10-05 | 深圳宝德科技集团股份有限公司 | Method and device for detecting hard disks |
| CN103473155A (en) * | 2013-08-29 | 2013-12-25 | 杭州华为数字技术有限公司 | Power device, storage unit and power module |
| CN103984604A (en) * | 2014-05-23 | 2014-08-13 | 环旭电子股份有限公司 | Control device |
| CN105426287A (en) * | 2015-11-09 | 2016-03-23 | 浪潮电子信息产业股份有限公司 | Method for realizing stability operation detection of magnetic disc by utilizing back plate voltage monitoring function |
| CN105354515A (en) * | 2015-12-09 | 2016-02-24 | 浪潮电子信息产业股份有限公司 | Hard disk backboard protection method |
| CN107294199A (en) * | 2017-06-27 | 2017-10-24 | 合肥尚硕新能源有限公司 | A kind of compound voltage detecting switching circuit of logic |
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| CN111766933A (en) | 2020-10-13 |
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