TWM294774U - Power supply protecting circuit for motherboard - Google Patents

Description

M294774 VIII, new plastic description: [New technology field] This creation is about a kind of motherboard power supply protection circuit, especially one can automatically check mKc coffee aliwssingUnit, towel central office) supply mosquito field board power supply protection circuit. [First technology] t brain electricity _ head has - provided on the pin - Wei control miscellaneous (10) (four) letter • number) 'This signal is usually high level. Wait until the computer's power switch button (P〇werButton) ^ M PSON^fL^ ACPI (Advanced Configuration and Power

Interface advanced configuration and power interface) controller control and transition to a low level. The working status of the power supply is changed when the PS(10) money is low level from the high level view. For example, if the power supply does not supply power to the computer at this time, the #ps〇N# signal changes from a high level to a low level, and the power is turned on. Power the computer; if the power supply is supplying power to the computer at this time, when the PSON# signal changes from high level to low level, the power supply is turned off and the power supply to the computer φ is stopped.

Ik is the CPU (Central Processing Unit) operating frequency increase, its power consumption is getting higher and higher, so the computer power supply provides a plug for powering the CPU. At present, users tend to solve some small problems of the computer themselves, such as inserting components on the motherboard or cleaning the CPU fan. When performing such operations, the user often plugs in the power for convenience and safety. Unplug the power cable on the motherboard. After the operation is complete, plug the power cable. However, because the CPU power cable is not very conspicuous, users often connect only the power cable of the motherboard and forget to connect the CPU power cable. In the case of 6 M294774, it was opened yesterday, and the material can be used to make cpu and the board is powered. If this condition persists for a period of time, and because the -the initial enable level of the master is likely to be low level U level is valid, the I/O controller that controls the wheel will enter the pending state. Yes, the stalker keeps some motherboards +, touches the sorrowful performance, and the "wheel" (four) power switch signal will not be able to be lang, resulting in the motherboard power supply ~ the board is in the long-term non-working, so Motherboard ^ cut off 'main [new content], "big. Xin shouted above, it is necessary to provide - Wei automatically detects the power supply protection circuit for the protection of the motherboard. / The butterfly r tr delete f care her f drive power line domain board, the motherboard power supply circuit includes - input output control _, a group of evil and power fine control, - control serial generation circuit and - make The signal generation circuit generates a signal according to the power supply condition of the central processing unit, and is sent to the output controller (four), and the same is enabled to generate the peach generation-enable signal. In order for the input and output controller to properly handle the control number, the central processing II Weiss is connected correctly (four), the control ship is controlled by the miscellaneous person; the transmission is recorded _ advanced _ and the electric surface (four) such as Qing power stop powered by. Compared with the conventional technology, the power supply protection circuit of the motherboard has higher reliability and safety. It can quickly detect the CPU power supply status when the power is turned on. The CPU power supply condition is abnormal. The ship is guaranteed to be self-contained, and the motherboard is promptly protected. . [Embodiment] The M294774 cup is read in the first figure, and the power supply protection circuit of the main board includes a control extension circuit 10 and an enable signal generation circuit 30. & + 曰 The control signal generating circuit 10 includes - a first transistor Q1, a second field effect transistor Q2, and a - third field effect transistor (7). The base of the first transistor is connected to the power output terminal P1 by a first-resistor R1. When the Han is working, the power output 3 terminal P1 outputs a high-level normal working signal S1, and the collector is provided by the collector. The second resistor R2 is affixed with a power supply terminal tree providing a +5V operating voltage, the emitter of which is connected to the drain of the second field effect transistor Q2. The closed end of the second field effect transistor Q2 is connected to the CPU (Central Pr. singing Unit) operating voltage control terminal P2 via a third resistor R3, and the control terminal p2 generates an operating voltage indicating signal S2, which is The source of the two field effect transistor Q2 is grounded, and a fourth resistor is connected between the gate and the source of the second field effect transistor Q2. The idle electrode of the third field effect transistor Q3 is connected to the emitter of the first transistor Q1, and the drain output thereof is a control signal. When the power supply of the coffee is abnormal, the control signal changes the switching signal pwrbt·, and The bungee is connected to the computer power switch 6〇, the source thereof is grounded, and the fifth resistor R5 is connected between the gate and the source of the third field effect transistor Q3. The enable signal generating circuit 30 includes a fourth field effect transistor 〇4, a fifth transistor Q5, and a sixth field effect transistor Q6. The gate of the fourth field effect transistor Q4 is connected to the emitter of the first transistor Q1, the source thereof is grounded, and the drain is connected to the collector of the fifth transistor Q5, and the base of the fifth transistor Q5 is borrowed. A sixth resistor R6 is connected to an output terminal P3 of the CPI (Advanced Configuration and Power Interface) controller 70, and its collector is connected to the host M294774 board + 5V power supply terminal by a seventh resistor 7 'The emitter is grounded. The sixth field effect transistor (9) is connected to the collector of the fifth transistor Q5, and the output of the immersed signal is sent to the (8) (put/output input) control unit, such as the enable terminal. Material, the ship is connected to the main board +3.3V power supply terminal by an eighth power supply, and its source is grounded. The first capacitor C is connected to the bth pole and the source of the h/th, the electric field and the body Q6. For the purpose of stabilizing the enable signal PWRGD of the sixth field effect transistor Q6. The working process of the circuit is described below. . Press _ off 6G when starting up, usually under the condition of high level switch letter #u PWRBTN# at this time becomes low level, 1 / 〇 controller 8 〇 send a Qing Cong number to the ATM controller 7〇, through the ACPI controller 7〇 control power supply 50 start 'power 5 〇 start to power the main her 'new board + 5v voltage and other secrets normal work · the voltage domain, and at the same time generate a normal work letter Level signal. i is - Nan Ruo power supply to the Wei Wei Wei, the CPU is not normally powered 'in the first = ^ 2 signal is low, the second field effect transistor Q2 _ and the source without voltage, the second The field effect transistor 〇2 is turned off. The first transistor saves money and the signal S1 is turned on at a high level, and the emitter is turned off - a high level ^ effect transistor q3 generates a bias voltage between the gate and the source, and the brother The two field effect transistor Q3 is turned on, and the third field effect transistor Q3 is not the second system L dragon is low level at this time, from * and the third field effect electric aaa|| Q3, the switch domain PWRBTN# High level becomes low level; at this time, with...°,

The fourth field effect transistor Q4 connected by the emitter of Qi is extremely high. The electric crystal 1 is electrically connected to the fourth M294774. The field effect transistor Q4 is turned on, and its immersed output is low. 曰6 gate is extremely low. Level, the sixth field effect transistor Q6 is turned off, because the field effect electric MQ6 secret is connected with the 3 3 power supply end provided by the domain board, so the poleless output a high word enable signal PWRGD to ensure the (10) The controller 8g continues to operate normally' such that the low level switching signal pWRBTN# can transmit the shutdown information to the ACPI control (4) by the (10) controller (6), and the Acpi controller dies to send the command to the power source 50 to stop the power supply. Protect the motherboard. The power supply wire for the right power supply to the CPU is connected, the CPU power supply is normal, the signal is phantom high, and the signal S2 is audibly input to the gate of the second field effect transistor Q2 by the third resistor, the second field The effect transistor (10) is turned on, and its drain output is low-level, that is, the gate of the second transistor Q3 is at a low level, the third transistor Q3 is turned off, and the switching signal PWRBTN# is not affected, and remains high. At this time, the gate of the fourth field effect transistor Q4 is also at a low level, and the fourth field effect transistor Q4 is turned off. Since the power supply of = cpu is normal 'the signal S2 is high level, the & output signal of the power supply 5〇 is input to the ACPI controller, 7() with the high level signal S2 - the Α(:ρι(四)^ output terminal P3 output - high level auxiliary signal %, the auxiliary signal % is input to the base of the fifth transistor Q5 through the sixth resistor R6, the fifth transistor Q5 is turned on, and its collector output - low level, That is, the sixth field effect transistor Q6 is idle at a low level, the sixth field effect transistor q6 is turned off, and the drain thereof outputs a high level enable signal PWRGD' to ensure that the 1/0 controller 8 continues normal. Working, the switch signal PWRBTN# remains high' by the 1/〇 controller 8〇 transmitting normal operation information to the ACPI controller 70' and then the ACPI controller 7〇 sends an instruction to the power supply 5, causing the M294774 to continue Normally, the power supply. In summary, the creation has indeed met the requirements for the creation of patents. It is a shame to propose that the above should be covered by the above-mentioned two examples, which is only the preferred embodiment of this creation. The equivalents or changes made by the person's spirit in the spirit of this creation Patent application within the range of >. [Brief Description of the drawings]

The first figure is a circuit diagram of a preferred embodiment of the authoring motherboard for the maintenance of the main board [main component symbol description] control signal generating circuit 10 power supply 50 advanced configuration and power interface 70 first transistor Q1 third field effect transistor Q3 Fifth transistor Q5 first resistor R1 third resistor R3 fifth resistor R5 seventh resistor R7 first capacitor C normal operation signal S1 operating voltage indication signal S2 auxiliary signal S3 enable signal PWRGD switching signal PWRBTN# enable signal generating circuit 30 Power switch 60 I/O controller 80 Second field effect transistor Q2 Fourth field effect transistor Q4 Sixth field effect transistor Q6 Second resistor R2 Fourth resistor R4 Sixth resistor R6 Eight resistor R8 Power output terminal P1 CPU working voltage control terminal P2 advanced configuration and power interface output terminal P3 input and output controller enable terminal P4 power control signal PSON#

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Claims (1)

M294774 IX. Application for Fan River: 1. A power supply protection circuit for the motherboard to protect the motherboard that is not connected to the power line of the central processor. The power supply protection circuit of the motherboard includes an input and output controller and an advanced configuration. And the power interface controller, the improvement is that the motherboard power supply protection circuit further comprises a control signal generating circuit and an enable signal generating circuit, and the control signal generating circuit is generated according to the power supply condition of the central processing unit - control And being sent to the input output control n, and the enable signal generating circuit generates an enable signal to enable the input/output controller to normally process the control signal when the central processing subtraction line is not properly connected. When the control input signal causes the input output controller to transmit the shutdown u bank μ itpmi and the power interface controller to control the power supply to stop supplying power. 2. As stated in the application for the power supply protection circuit of the motherboard as described in item 1, the further step includes - central processing ϋαι as the f voltage control unit, and the processing of the central processing unit of the towel is based on the power supply status of the central processing unit. An indication signal is output. When the central processor power cable is properly connected, the finger reading number is -high level, and the indication signal is a low level when the power supply line of the towel processor is not properly connected. 3· ^ Apply for the domain board power supply protection circuit of the second job of the patent, wherein the indication signal and the output signal of the power supply are sent to the control signal generating circuit, and the control record generating circuit outputs according to the two money The control signal. b. Applying for a patent to turn to the motherboard power supply protection circuit of the third aspect, wherein the control generation circuit comprises a _th transistor, a second field effect transistor and a third field effect transistor, and the normal operation signal of the power output Sent to the base of the first transistor, the collector of the first transistor is connected to the power supply end of the motherboard, and the collector is connected to the second field effect 12 M294774. The pole between the transistors, the second field effect transistor source Extremely grounded, open and reduced ^ should be the scale of the transistor, the surface three-field effect transistor - the emitter of the % crystal, the source is grounded, the control signal is from its drain 5. If you apply for the special fiber _ 4 The circuit power supply circuit includes a fourth field effect transistor, a fifth transistor and a field effect transistor, and the fourth field effect transistor gate is connected to the first transistor. An emitter having a source connected to the ground and having a drain connected to the collector of the fifth transistor, the base of the fifth transistor being connected to the wheel of the advanced configuration and the power interface controller Grounding, the gate of the sixth field effect transistor is connected to the set of the fifth transistor The pole, the basin, and the pole are connected to the power supply end of the motherboard by an eighth resistor. The enable signal is output from the drain of the sixth field effect transistor, and the source thereof is grounded. 6. The motherboard power supply protection circuit of claim 5, wherein a first capacitor for stabilizing the output of the enable signal is connected in series between the drain and the source of the field effect transistor. 7. The power supply protection circuit of the motherboard as described in item 5 of the patent scope, wherein the normal working signal and the axis display money are simultaneously sent to the Longjin 敝 electric age controller, when the two signals are high, The advanced configuration and the power interface controller wheel-rain level_the base of the fifth transistor, if the two moneys are all _ or all of the low level, then the advanced configuration and power interface controller Output - low level to the base of the fifth transistor. 13