TWI247467B - Hot-swap power protection circuit of hard disk in computer device - Google Patents

Abstract

The present invention relates to a hot-swap power protection circuit of hard disk in computer device, which includes a hard disk swap detection circuit connected to a hard disk to be detected via a hard disk plug-in signal line to detect if the hard disk is properly plugged in the computer device, and regularly providing the operating power supply to the hard disk while detecting that the hard disk is plugged in the computer device; a current detection circuit connected to the power supply line for detecting if the load current flowing through the power supply line exceeds a preset current threshold value; and an over-current protection circuit connected to the current detection circuit, and generating an over-current protection signal to make a power supply switching unit open-circuit, so as to cut off the operating power to the hard disk, while detecting that the load current exceeds the preset current threshold value.

Description

V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Field of the Invention The present invention relates to a hard disk protection circuit for a computer device, and relates to a hard disk hot swap power protection circuit for a computer device. [Prior Art] Data storage device, interface circuit, processing unit, etc.; and: Input:: device, an important data storage device, where the user's resources, such as hard disk j 棺, need to be stored on the hard disk in. The king's style, design and the benefits of computer technology, consumer demand is also getting higher and higher, so in the design of many computer modules;: domain needs or hot plugging instructions. In the hard disk η area ^ can be used to shoot design. For example, some manufacturers set the hard disk to the same functional state, so that the user can carry the ^=冓 type into a hot-swappable type, and the user turns off the hard disk design brain device. The program can be used for two hard disks without the need to extract the hard disk and the hard disk that affects the computer system. The hard disk is designed to be easy to assemble and disassemble: operation. In addition, some manufacturers only need to go through the simple removal of the ^ 1 so that the user can be removed and removed. ° The hard disk can be installed in the patented technology, and the module can be used, for example, the Republic of China new type = to the function of hot plugging, revealing a hot plugging heat issue number 557107 The front side of the main body of the main body is provided with an industrial computer, which is mainly provided with an opening for the political heating device, and the 1247467 5, invention description (2) ΪΪif should be provided at the opening - The heat sink can be guided to move / / The main box body is provided with a connection that can be connected with the connection port. The industrial computer can be directly taken out for maintenance without stopping the machine, so as to achieve hot swapping. Activator. Soil % π is the same as the new patent of the Republic of China approved by the applicant; it discloses a hard disk hot plug machine, a fixed slider, a hard disk extraction handle, and two card holders. When the disc is fixed on the slider, two of the two deck cards are: the disc is fixed, the side edge of the block is f, and the f is stuck in the hard disk storage rack at the fulcrum of the two handles, and the fulcrum of the two handles is used as a lever fulcrum. Out of the entire organization. 々 枰 枰 丨 丨 丨 公告 公告 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 554 Pull out the function. , 露-ίΐΐϊ: In the new national patent number No. 507896, it discloses a hot-swappable device with a two-faceted interface, which can process the IDE command transmitted from the surface. The ide disk controller has at least 兮Wherein the code is used to connect the ATA interface to the input device if the IDE disk controller is connected to the physical storage device via the second virtual storage device, and the code is used to store the entity. When the device is connected to the IDE disk controller, the connection between the IDE device controller and the ATA interface is disabled, and the transfer is performed by the entity storage device. The invention description (3) is set back to the interface. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is that the user places the hard disk on the computer system; the protection of the hard disk is not damaged or: 乍,, therefore, it is necessary to design a protective power ::SiS, the normal moonlight color reaches the following two functions: ·, the staff's protection circuit should be 1 · When the hard disk has not been inserted, the protection circuit should be able to provide power to the hard disk after the installation is completed. Λ, °,, ', wait for the hard disk 2;:: The disk should be automatically cut off when it is overloaded, which affects the stability of the system. Not yet you 罨 / original, make no road yuan; 5 3 im 'Although theoretically you can use the integrated body height, the cost of the integrated components used will be relatively high, so it is necessary to protect the circuit... Should be the actual needs. The technology of plugging and unloading] for the above; n has a lot of heat, for example, in some of the previous patents #街Φ白 failed to provide a good countermeasure. Function, but Fu Kezhong Yuzhang $ two Although it claims to be able to achieve hot plugging ^ ^ ^ i. As a hot swap protection function of the hard disk. Example: Huamin New Patent Bulletin No. 5571 Fan module hot plug function describes the Republic of China invention patent princess #咏_ ^ Debt measurement on the USB interface. Edited in No. 554280, it only applies to 1247467

V. Description of invention (4)

Some of the prior patented technologies, although designed as hot-swappable functions, are only hot-swappable mechanisms (for example, the aforementioned Republic of China Patent No. 526992). Some of the prior patented technologies have the function of hot plug detection, but the circuit design must occupy the power of the system and cooperate with some integrated circuit components in the computer system (for example, the former @糸华国国 new patent) Bulletin No. 50 7896). Therefore, it is known from the existing technology that the current function and the ability to detect the hard disk are inserted into the design of the electrical protection function. Therefore, the main purpose of the present invention is to hot-swap the power protection circuit, which can achieve the function of the hard disk by means of the switch unit. Another object of the present invention is to provide a plug-in power protection circuit that, in addition to being able to operate, can operate the power supply in the event of an overload condition. f does not have any hard disk hot plug-in Hungarian system, and can perform hard disk overload is to provide a computer device hard by simple hard disk detection circuit with the protection required for hot swapping with overload detection The hard disk hot-sweep protection function of the hard disk is detected. If the state of use of the hard disk is detected, the technical means for solving the problem of the present invention supplied to the hard disk is cut off: The present invention is to solve the conventional technology. Question count - hard disk insertion and measurement circuit, 丨』: Household: The technical means is set on the detected hard disk to detect the hard one hard disk plug female signal line connection shows that $ is plugged in To the computer

1247467 V. Description of the invention (5) Set: When it is detected that the hard disk has been inserted into the power supply to the hard disk. In the normal supply protection circuit of the hard disk, a current detecting circuit is included. == Whether the load current of the supply line of the present invention exceeds a preset, and the μ side is over the power flow: the power supply is connected to the current detecting circuit. When the electric-overcurrent exceeds the preset current upper limit value, - ', the power supply switching unit (4) is applied to the load to cut the 2:: protection signal to the source. The work of the present invention against the hard disk is compared with the prior art. The protection function required for the hot swapping of the present invention is also compared with the prior art, and the hard disk is hardened at 5 贞. When the disc is overloaded, cut off the supply and set off in time. ΓίΒ0 The use of safety and system stability of the protection circuit only need to use the commonly used protection circuit 'utilize low-cost electronic parts can reduce the number of 'this without reducing its function, so it can improve the product [implementation] : Refer to the first figure, which shows the circuit function block diagram of the hot-swap power protection circuit of the computer device of the present invention, and the function is that the hard disk is plugged into the computer device and then the working power is supplied. To the disc, and when the overload condition of the hard disc is detected, it can be cut in time 1 1247467

V. INSTRUCTIONS (6) Disconnect the working power supply to the hard disk to protect the hard disk and further ensure the normal operation of the entire computer system. '' In the current design of the computer system, the working power supply for the hard disk includes the working power supply of +12V and +5V, so the power supply in the computer device is supplied separately via the power supply lines Li, L2. + 12V & + 5V working power to the hard disk 2. In the circuit function block shown in the figure, a hard disk hot swap power protection circuit of the present invention includes a first power supply switch unit 4 connected in series to the power supply line 1 to enable the + 12v DC power is supplied to the hard drive. A second power supply switch unit 42 is connected in series to the power supply line L2 to supply the +5V DC power to the hard disk. ", a hard disk insertion detection circuit 3 is connected to the hard disk 2 via a hard disk insertion signal line SCSIPW# to detect whether the hard disk 2 has been properly connected to the electric moon & When it is detected that the hard disk 2 has been inserted into the computer device, a power supply control signal PWR_OFF# is sent to control the power supply switch units 41, 42 to normally supply the working power of +12V and +5V to the hard disk 2. A first current detecting circuit 51 is disposed in the power supply line L1 for detecting whether the load current u flowing through the power supply line L1 exceeds a set current upper limit I lmax. The measuring circuit 51 can detect the magnitude of the load current 11 by using a series resistor. A first overcurrent protection circuit 52 is connected to the current detecting circuit 51, and can receive the load current represented by the first current debt detecting circuit 51.第一i small signal. The first overcurrent protection circuit 52 can compare the received current II with a current upper limit value Ilmax, when comparing the load power

Page 10 1247467 V. Description of the invention (7) When the flow 11 exceeds the preset current upper limit Π max, a first overcurrent protection signal 0C1 can be generated to control the power supply switch unit 4 1 and 42 simultaneously Supply the +12V and +5V working power to the hard disk 2. A second current sense circuit is provided in the δH power supply line L 2 for detecting whether the load current I 2 flowing through the power supply line L2 exceeds a preset current upper limit I 2max . The second current detecting circuit 61 can use a series resistor to detect the magnitude of the load current 丨2. An overcurrent protection circuit 6 2 is connected to the current detecting circuit 6 j

The signal sent by the second current detecting circuit 61 to represent the magnitude of the load current 丨2 can be received. The second overcurrent protection circuit 62 can compare the received load current I 2 with a current upper limit value ϊ 2max , and when comparing the load current I 2 to exceed a preset current upper limit value 丨 2max, A second overcurrent protection signal 0C2 is generated to control the power supply switching units 4A, 42 to simultaneously cut off the +12V and +5V operating power supplies to the hard disk 2. In a preferred embodiment of the invention, the power supply switch unit 4, can utilize a MOS power transistor or other equivalent switching element. In the present invention, the circuit board can further include a boosting circuit 7 for strictly closing the DC of the + claws 41. The standard 22V is used to supply the operating voltage required for the power supply switch to 7041, 42.

The following: shows the control flow chart of the present invention, and refers to the first explicit I-path architecture'. Further to the control flow of the present invention, when the power supply of the camphor device is turned on (step ι〇ι), the present invention The protection test hard disk detects whether the hard disk is inserted into the computer system (step 102), and detects whether the hard disk female signal line is normal (step 103). Illusion

1247467

If it is detected that the hard disk has been inserted into the computer device, then the power is being supplied to the hard disk (step 104). If the normal hard power supply is not detected or the user has removed the hard disk, The power of the present invention will supply the working power to the hard disk. P is not in the power supply and normal use condition of the hard disk, and the present invention detects whether the hard disk is overloaded (step 丨〇5), if not, Then, if the hard disk is detected to be overloaded, the working power supply (step 106) is turned off to protect the hard disk and protect the computer - hard stable. There are two kinds of power supply for the hard disk, one is + 5v_ - is + 1 When the protection circuit of the present invention measures (four), as long as there is a phenomenon that the supply voltage is overloaded, the power supply will be cut immediately. The power supply of the protection system is not affected. After the protection circuit of the invention is activated, the overcurrent protection function must be forced to do the action of removing and reinserting (step 1〇7), and the circuit will be heavy white. 2 Newly start to use the hard disk. Of course, it is also counted in the protection circuit;电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源 电源鲈占～3d diagram, with the first hard disk inserted;; J = eyepiece U1, U2, and 晶晶_. Where the SCSI line SCSIPW# low voltage means that the hard disk has an insertion, high power

The circuit diagram is its main? =Inventive medium hard disk insertion and integration circuit 3 embodiment 1247467

No when pressing. The hard disk is inserted into the signal line %511^# inverter υι output high power repeatedly, when the inverter output is high, the electric body Q1 will be turned on, the power supply control signal pWR_〇^ ^ is turned off Power Output. -J = 'closed during use. Zhu Bian will also make the power off. The third B diagram shows the first current detecting circuit 51, the overcurrent protection circuit 52, the first power supply switch unit 41, the source supply switch unit 42, and the hard disk in the present invention. 2 connected circuit diagram. One hair When the disc 2 is inserted, it will supply +5V and +12V working power to the disc. ",

When the +1 2 V working power supplied by the power supply is sent to the hard disk 2, the negative current is detected by the resistor R1, which transmits the differential voltage to the operational amplifier U3. When the current is increased, the voltage drop across the resistor will increase, and the op amp U3 will increase its output due to the increased differential voltage. The characteristic of the inverter U 4 is that the input terminal voltage is 1 · 3~2 · When the output terminal is low voltage, when the voltage of the input terminal of the inverter U4 reaches its range, the inverter U4 will output a low voltage. Therefore, the flip-flop U5 outputs a high voltage to turn on the transistor Q2, so the power supply control signal pwR-〇ff# is a low voltage, so the +1 2 V power supply to the hard disk 2 is turned off.

The third C diagram shows a circuit diagram of the second current detecting circuit 6A and the second overcurrent protecting circuit 62 in the present invention. When the + 5v working power supplied by the power supply is sent to the hard disk 2, the magnitude of the load current is measured by the resistor R2, which transmits its differential voltage to the operational amplifier U6. When the current is increased, the voltage drop across the resistor R 2 will also increase, and the operational amplifier U6 will have a voltage difference.

Page 13 1247467 V. The increase in invention description (10) will increase its output. The output of the operational amplifier U6 is connected to a contact OC as shown in Figure 3B. By the second current, the circuit of the circuit 61 and the second overcurrent protection circuit 62 operates, and the +5V power supply to the hard disk 2 can be turned off in the event of an overload. The third D diagram shows the circuit diagram of the booster circuit 7 of the present invention, and the +12V voltage supplied by the power supply device controls the transistor Q3 through the inverter U7 and the related resistance and capacitance 's. The voltage at the output of the booster circuit 7 is increased to +22V to supply the voltage required for the first power supply switching unit and the first power supply switching unit 42 to operate. Therefore, when the power supply control signal PWR_〇ff# is low voltage, the circuit will close the working power supply to the hard disk, and the high voltage (+22V) state: then the second power supply switch unit 41 and the second The power supply 'Kuanfan 42 is turned on, and the output power of +12V and +5V respectively is supplied to the hard disk. If there is a sudden state in which the hard disk power supply is short-circuited (ie, an overload condition), the Zener diode state and milk in the third B diagram will quickly pull the positive = = to the low power M ' The protection of the start-up circuit speeds up the reaction' to avoid component damage. In actual application and productization, a current lamp can also be designed to indicate that the above-mentioned hard disk has been plugged in, and the state of the above-mentioned hard disk has been plugged in, and the current supply and overcurrent are provided. According to the embodiment of the present invention, the hard disk hot-swappable power supply of the present invention protects the mine and provides the security of the hard disk power supply and the security of the hard disk when used. The use of the value of the text. The text is very industrial, but the above description of the embodiment, only the preferred embodiment of the present invention, 1247467, the description of the invention (11), those skilled in the art can be based on the present invention The above-described embodiments are intended to be illustrative of various modifications and variations of the present invention. However, various modifications and changes in the embodiments of the present invention are still within the scope of the invention.

Page 15 1247467 Brief Description of the Drawings [Simplified Description of the Drawings] The first drawing shows the circuit function block diagram of the hard disk hot-swap power supply protection circuit of the computer device of the present invention; the second figure shows the control flow chart of the present invention; 3A is a circuit diagram showing an embodiment of a hard disk insertion detecting circuit in the second figure; the third B is a first current detecting circuit, a first overcurrent protection circuit, and a first power supply in the second figure. The circuit diagram of the embodiment of the supply switch unit, the second power supply switch unit, and the hard disk connection; the third C diagram shows the circuit diagram of the second current detection circuit and the second overcurrent protection circuit in the second figure; The D diagram shows a circuit diagram of an embodiment of the booster circuit in the second figure. Description of each component symbol: 1 power supply 2 hard disk 3 hard disk insertion detection circuit 41 first power supply switch unit 42 second power supply switch xso early morning 51 first current detection circuit 52 first Current protection circuit 61 first current detection circuit 62 second over current protection circuit 7 boost circuit

Page 16 1247467

Page 17 diagram simple description LI, L2 power supply line 11, 12 load current 11 max, I2max current upper limit U1 inverter U2 inverter U3 operational amplifier U4 inverter U5 forward and reverse U6 operational amplifier U7 reverse Phaser Q1 transistor Q2 transistor Q3 transistor R1, R2 resistor DS1 ^ DS2 Zener diode

Claims (1)

1247467 VI. Patent application scope 1 · ^ Hard disk hot-swap power protection circuit for computer devices, including right. Source supply switch unit, which supplies electricity to the hard disk as a working power supply via a power supply line; The hard disk is inserted into the detection circuit and the hard disk is inserted into the hard disk to determine whether the hard disk has been inserted until the hard disk is inserted into the computer device. The power supply switching unit starts to supply the working power supply: a current detecting circuit connected to the power supply, whether the load current of the power supply line exceeds a predetermined power value; the circuit is connected to the current detecting circuit And when detecting that the μ load motor exceeds the preset current upper limit value, an overcurrent protection signal is generated to cause the power supply switch unit to turn on 4 to cut off the working power supply to the hard disk. 2. The hard disk hot swap power protection circuit of the computer device of claim 1 wherein the current detecting circuit comprises a resistor connected in series to the power supply line. 3. The hard disk hot swap power protection circuit of the computer device of claim 1 further comprising a booster circuit for boosting the DC power supply to a predetermined voltage level. The driving voltage required for the power supply switching unit is supplied. Page 18 1247467 VI. Application for Patent Scope 4. The hard disk hot-swap power protection circuit for a computer device as claimed in claim 1 wherein the power supply switch unit includes a first power supply switch unit. The + 1 2V DC power supply is supplied to the remote hard disk as the working power source; the first power supply switching unit is used to supply the + 5 V DC power supply to the # hard disk as the working power source. 5 · f applies for the hard disk hot swap power protection circuit of the computer device of the fourth aspect of the patent scope, wherein the overcurrent protection circuit comprises: ▲ the first power < protection circuit, via a first current detecting circuit Detecting the load current of the power supply line from the working power supply to the hard disk, and detecting that the load current exceeds a preset current upper limit value, the current protection circuit is generated by the =π π ί current protection circuit. The current protection signal causes the first slave =" switch unit to open to cut off the +1 2 ν working power supply to the hard disk; # 二二过电凌保护电路, detected by a second current detecting circuit ^2~, +5V working power supply to the load current of the hard disk power supply line, 2. When the 5 hp load current exceeds a preset current upper limit value, an overcurrent protection signal is generated by the two current protection circuit The second slave switch unit is opened to cut off the supply to the hard +5v working power supply. Such as the hard disk hot swap power supply of the computer device of the fifth item of the scope of the patent application Page 19 1247467 6. Applying for a patent protection circuit, wherein the first overcurrent protection circuit generates the overcurrent protection signal to cause the first power supply switching unit to cut off the + 1 2V working power supply to the hard disk. At the same time, the +5V working power supply to the hard disk is cut off. Page 20