CN101047310A - Overheat protection circuit and system circuit board - Google Patents
Overheat protection circuit and system circuit board Download PDFInfo
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- CN101047310A CN101047310A CN 200610025153 CN200610025153A CN101047310A CN 101047310 A CN101047310 A CN 101047310A CN 200610025153 CN200610025153 CN 200610025153 CN 200610025153 A CN200610025153 A CN 200610025153A CN 101047310 A CN101047310 A CN 101047310A
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Abstract
An overheat protection-circuit consists of the first logic circuit for receiving voltage detection signal and overheat signal and for outputting one first logic signal after calculation, memory circuit for receiving said first logic signal and control signal and for outputting latch signal after calculation, the second logic circuit for receiving said latch signal and control signal and for outputting a power supply control signal after calculation, and power supplier for deciding not to output an operation voltage according to said power supply control signal.
Description
Technical field
The present invention is for being relevant to a kind of overheating protection circuit, is meant that especially a kind of being used for avoid central processing unit overheated on the computer main frame panel, and can be in overheating protection circuit and the system circuit board of turning off power supply at the appointed time.
Background technology
Computer has become a kind of indispensable instrument in human daily life.Nearly all professional work all need be dependent on computer, so that work can be easier and more efficient.Along with computer is more prevalent, the processing clock speed of central processing unit (clock speed) short several in the period of, grow to the unit of measurement of per second 1,000,000,000 times from 1,000,000 times metering units of per second, not only the assembly of computer hardware becomes than more complicated in the past with circuit, even the program code of computer software also from before only need millions of approximately row instructions, grow to tens and go.
In present computer, have the South Bridge chip combination on the motherboard.And intrasystem low speed device major part is controlled by the South Bridge chip group.Wherein, the South Bridge chip group is responsible for keyholed back plate Industry Standard Architecture (IndustryStandard Architecture, abbreviation ISA), integrated driving electrical interface (Integrated DeviceElectronics, abbreviation IDE), slower device such as universal serial bus (USB), peripheral part linkage interface (PeripheralComponent Interconnect is called for short PCI) bus.In addition, the South Bridge chip group also is connected to power supply unit, with the control power supply unit.
Please refer to Fig. 1, it is the circuit block diagram of a kind of system circuit board in the prior art.This system circuit board 100 comprises central processing unit 102, South Bridge chip group 104 and power supply unit 106.Wherein, South Bridge chip group 104 is for being electrically coupled to central processing unit 102 and power supply unit 106, and contains an overheating protection circuit (not shown) in the South Bridge chip group 104.
In the prior art; this central processing unit 102 is when the temperature that detects central processing unit 102 surpasses a default value; then export a heat alarm to South Bridge chip group 104, and after processing by overheating protection circuit, export a power-off signal to power supply unit 106.And power supply unit 106 promptly stops output voltage to system circuit board 100 in receiving this power-off signal, burns out because of temperature is too high to avoid central processing unit 102.
In addition, overheating protection circuit is designed in the South Bridge chip group also just like shown in Fig. 2.In Fig. 2, this system circuit board 000 comprises central processing unit 202, super I/O chip (Super IOcontroller) 204, South Bridge chip group 206, basic input output system (BIOS) 208 and power supply unit 210.
In the prior art, central processing unit 202 is when the temperature that detects central processing unit 202 surpasses a default value, then exports a heat alarm to super I/O chip 204.Then, 204 of super I/O chips export heat alarm to South Bridge chip group 206, and after being processed by overheating protection circuit, export a power-off signal to power supply unit 210.And power supply unit 210 promptly stops output voltage to system circuit board 200 in receiving this power-off signal, burns out because of temperature is too high to avoid central processing unit 202.
The above is overheating protection circuit is designed example in the South Bridge chip group, unique different be exactly the central processing unit 202 of Fig. 2 for to export a heat alarm to super I/O chip 204, be resent to South Bridge chip group 206.
Please refer to Fig. 3, it is the circuit block diagram of another system circuit board in the prior art.In Fig. 3, itself and Fig. 1 and Fig. 2 difference be Fig. 3 be with overheating protection circuit 304 independent design on system circuit board 300.On this system circuit board 300, owing to heat alarm is not reached the South Bridge chip group, so the designer need add some circuits and go power supply unit 306 is turned off, and in the former circuit, such pass method can only be turned off several milliseconds, system circuit board 300 will be opened again afterwards, perhaps need through just going to turn off system after 4 seconds (override), but this demand that will in 0.5 second, shut down of compliance with system not.
This system circuit board 300 comprises central processing unit 302, overheating protection circuit 304, power supply unit 306 and super I/O chip 308.Wherein, overheating protection circuit 304 is for being electrically coupled to central processing unit 302, power supply unit 306 and super I/O chip 308.
Then, please in conjunction with Fig. 3 and Fig. 4, wherein, Fig. 4 is the practical circuit diagram of the overheating protection circuit of Fig. 3.
In the prior art, overheating protection circuit 304 for comprise transistor Q2～Q5, resistance R 4～R7, capacitor C 2, with door 402 and flip-flop 404.Wherein, resistance R 7 is for receiving memory voltage (V_SM1), resistance R 6 receives operating voltage (VCC3), resistance R 4 is with R5, flip-flop 404 and all receive stand-by power supply with 402 at door, and (during start, heat alarm is a logic high potential to the heat alarm that the base stage of transistor Q4 is transmitted for reception central processing unit 302; During shutdown, heat alarm is a logic low potential).
Memory voltage (V_SM1) may be because the relation of each different electrical power supply 306, the ratio operating voltage (VCC3) that can rise once in a while is slow, so heat alarm (THERMTRIP_L) may be pulled to electronegative potential (transistor Q2 is enabled), so will cause the undesired shutdown of system because of the misoperation of heat alarm (THERMTRIP_L).
Table 1
| The central processing unit heat alarm | Heat alarm/push button signalling | Super input/output signal | Power control signal |
| H | H | L | L (power supply unit ON) |
| L | L | L | H (power supply unit OFF) |
| H | H | H | H (power supply unit OFF) |
| L | L | H | H (power supply unit OFF) |
Please refer to table 1, it is central processing unit heat alarm (CPU_THERMTRIP_L), heat alarm (THERMTRIP_L)/push button signalling (PWRBTN_L), super input/output signal (SIO_ONCTL_L) and power control signal (PSON_L) logic current potential signal table.Wherein, H presentation logic high potential, L presentation logic electronegative potential.
When system circuit board 300 can normal boot-strap, if after running a period of time, when its inside that central processing unit 302 is surveyed reaches temperature value of setting, central processing unit 302 can be moved mistake central processing unit thermal signal (CPU_THERMTRIP_L) to electronegative potential, after the accurate position conversion through transistor Q2 and transistor Q5, central processing unit heat alarm (CPU_THERMTRIP_L) will be divided into the signal in two paths: heat alarm (THERMTRIP_L) and power button signal (PWRBTN_L) then.In first path, receive heat alarm (THERMTRIP_L) and process inverter 404 anti-phase super input/output signals (SIO_ONCTL_L) later with door 402.Then, produce an anti-phase signal with 402 at door and remove to turn off power supply unit 306 (this moment, power control signal PSON_L was a high potential),
, super I/O chip 308 do not have power supply when (power fail) when detecting, will through 0.5 second to 20 seconds (being controlled) by basic input output system just can be SIO_ONCTL_L (being controlled) transition by super I/O chip be high potential, so ability is certain turns off power supply unit 306.
After power control signal (PSON_L) transition is high potential, also promptly as shown in table 1, power supply unit 306 is not after having supply of electrical energy, because the relation of electric capacity residual voltage, heat alarm (THERMTRIP_L) can be high (current potential transistor Q2 is by forbidden energy) by transition again immediately.If this moment, super I/O chip 308 did not also transfer super input/output signal (SIO_ONCTL_L) to high potential, then power control signal (PSON_L) will be a logic low potential by transition.Therefore, power supply unit 306 will be opened again, and does not reach the purpose of shutdown.
In second path, it is for to be connected to power button signal (PWRBTN_L) and to be to use the mode of forcing shutdown.But using in the prior art forces the mode of shutdown then more can't reach the requirement of turning off power supply in 0.5 second through 4 seconds.
Summary of the invention
In view of the above problems, the object of the present invention is to provide a kind of overheating protection circuit, it can turn off power supply in the stipulated time, thereby avoids the overlong time of powered-down and produce central processing unit because of overheated situation about burning out.
In order to achieve the above object, the present invention proposes a kind of overheating protection circuit, and it receives a detecting voltage signal, a control signal and a heat alarm.Described overheating protection circuit comprises first logical circuit, memory circuit and second logical circuit.The above-mentioned first logic circuit is in order to receiving detecting voltage signal and heat alarm, and detecting voltage signal and heat alarm are done computing and exported one first logical signal.Above-mentioned memory circuit then is to be used for receiving first logical signal and control signal, and first logical signal and control signal are done computing and the output latch signal.The second above-mentioned logical circuit is reception latch-up signal and control signal, and latch-up signal and control signal are done computing and the out-put supply control signal.Wherein, power supply unit is then according to power control signal decision interruption output one operating voltage.
Described according to preferred embodiment of the present invention, overheating protection circuit is for electrically being connected to central processing unit, central processing unit and in detecting temperature when surpassing a default value, the output heat alarm.
The present invention reintroduces a kind of overheating protection circuit, and it comprises a detecting voltage signal, a control signal and a heat alarm.This overheating protection circuit comprises first logical circuit, inverter, memory circuit and second logical circuit.The above-mentioned first logic circuit is reception detecting voltage signal and heat alarm, and detecting voltage signal and heat alarm are done computing and exported one first logical signal.Inverter then receives control signal, and exports after control signal is inverted into an anti-phase control signal.Above-mentioned memory circuit then receives first logical signal and anti-phase control signal, and first logical signal and anti-phase control signal are done computing and the output latch signal.The second above-mentioned logical circuit then receives latch-up signal and anti-phase control signal, and latch-up signal and anti-phase control signal are done computing and exported a power control signal.Wherein, power supply unit is then according to power control signal decision interruption output one operating voltage.
The present invention proposes a kind of system circuit board again, this system circuit board central processing unit, IOC, overheating protection circuit and power supply unit.Above-mentioned central processing unit is exported a heat alarm for when detecting temperature above a default value.Above-mentioned IOC then is to export a control signal according to heat alarm.Above-mentioned overheating protection circuit system receives a detecting voltage signal, heat alarm and control signal, be used to computing after, export a power control signal.Above-mentioned power supply unit is according to power control signal decision interruption output one operating voltage.
Than prior art; institute's overheating protection circuit of the present invention and system circuit board can make system when the temperature that detects surpasses default value; and can turn off power supply at the appointed time; thereby can avoid producing the overheated and situation about burning out of central processing unit because of the overlong time of powered-down; this circuit structure is simple, has preferable use value.
Description of drawings
Fig. 1 is the circuit block diagram of a kind of system circuit board of prior art.
Fig. 2 is the circuit block diagram of another system circuit board of prior art.
Fig. 3 is the circuit block diagram of another system circuit board of prior art.
Fig. 4 is the practical circuit diagram of the overheating protection circuit of Fig. 3.
Fig. 5 is the circuit block diagram of a kind of system circuit board of a preferred embodiment of the present invention.
Fig. 6 is the circuit block diagram of another system circuit board of a preferred embodiment of the present invention.
Fig. 7 is the practical circuit diagram of the overheating protection circuit of Fig. 6.
Embodiment
Please refer to Fig. 5, it is the circuit block diagram of a kind of system circuit board of a preferred embodiment of the present invention.In Fig. 5, this system circuit board 500 comprises central processing unit 502, overheating protection circuit 504, power supply unit 506, IOC 516, voltage detection circuit 518.Wherein, system circuit board 500 can for example be a system host board, and IOC 516 can for example be super IOC, but all not as limit.
In the present embodiment, central processing unit 502 is exported a heat alarm for when detecting temperature above a default value.This IOC 516 is electrically coupled to central processing unit 502, and exports a control signal according to heat alarm.Wherein, as be familiar with this operator and can know easily, IOC 516 can be super IOC, but not as limit.And super IOC is a FDC, and is used for mouse beacon, keyboard.
This first logical circuit 508 receives detecting voltage signal and heat alarm, and detecting voltage signal and heat alarm are done computing, and exports one first logical signal.Memory circuit 510 is for being electrically coupled to first logical circuit 508, and receives first logical signal and control signal, so that first logical signal and control signal are done computing, and exports a latch-up signal.Second logical circuit 512 is electrically coupled to memory circuit 510, and receives latch-up signal and control signal, so that latch-up signal and control signal are done computing, and exports a power control signal.
In preferred embodiment of the present invention, 510 of memory circuits are for remembering or breech lock is lived the circuit of the state of first logical signal and control signal.
Please follow with reference to Fig. 6, it is the circuit block diagram of another system circuit board of a preferred embodiment of the present invention.The overheating protection circuit 604 that Fig. 6 and Fig. 5 difference are Fig. 6 has been Duoed inverter 514 than Fig. 5.Wherein, inverter 514 is to be electrically coupled to the IOC 516 and second logical circuit 512, and inverter 514 is for receiving control signal, and with control signal anti-phase after, export an anti-phase control signal.
Overheating protection circuit 604 is that with Fig. 5 difference memory circuit 510 is reception first logical signal and anti-phase control signal, and first logical signal and anti-phase control signal are done computing, and exports a latch-up signal; 512 of second logical circuits are to receive latch-up signal and anti-phase control signal, and latch-up signal and anti-phase control signal are done computing, and export a power control signal.
Then please refer to Fig. 7, it is the practical circuit diagram of the overheating protection circuit of Fig. 6.In Fig. 7, overheating protection circuit 604 more comprises resistance R 1 and capacitor C 1 except that first logical circuit 508, memory circuit 510 and second logical circuit 512.Wherein, memory circuit 510 can be a flip-flop, and can for example be the positive edge-triggered flip-flop of D type, but not as limit.
In the present embodiment, please in conjunction with Fig. 6 and Fig. 7, first logical circuit 508 comprises and door 520, transistor Q1, resistance R 2 and R3, and transistor Q1 then is the heat alarm (can be CPU_THERMTRIP_L) that transmits according to central processing unit 502 and start.Be reception heat alarm and detecting voltage signal with door 520, and export first logical signal after treatment to memory circuit 510.
In Fig. 7, explain orally for convenient, so memory circuit 510 is replaced with D type flip-flop.The input of this memory circuit 510 has a clock (CLK) end, D end, is reseted (PER#) end and and removed (CLR#) end, and the output of memory circuit 510 has Q end and Q# end.Wherein, clock (CLK) end is the output that is coupled to door 520, and D hold ground connection, resets output, Q end that (PER#) end is coupled to inverter 514 and is coupled to and 512 input, and Q# holds then suspension joint.
Table 2
| Input | Output | |||||
| PRE# | CLR# | CK | D | Q | Q# | |
| 1 | L | H | X | X | H | L |
| 2 | H | H | L＞H | L | L | H |
| 3 | H | H | L | X | Q | Q# |
Table 2 is the truth table of memory circuit 510.
In the present embodiment, it avoids the abnormal shutdown of system for utilizing one to combine with the door 512 anti-phase and detecting voltage signals with heat alarm (CPU_THERMTRIP_L) (PWROK power supply unit normally unlatching then just can be pulled to high potential) to produce a high potential.
Then, utilize memory circuit 510 to remove to control the subsequent action of heat alarm (CPU_THERMTRIP_L) again.After the connector of power supply unit 506 is inserted into system circuit board 600, the output Q of memory circuit 510 will be configured to high potential (1 in the truth table 2), and memory circuit 510 can continue output Q is remained on high potential again according to 3 in the truth table 2 afterwards.At this moment, memory circuit 510 is just calculated and is finished initial output setting.
Behind system boot during a period of time, when central processing unit 502 detects temperature inside when reaching temperature value of setting, central processing unit 502 can be moved heat alarm (CPU_THERMTRIP_L) to electronegative potential.At this moment, heat alarm (THERMTRIP) can produce the signal (2 in the truth table 2) from the electronegative potential to the high potential, this signal will be set at electronegative potential to the output Q of memory circuit 510, be in the same place with door with anti-through the inversion signal after anti-phase with control signal (SIO_ONCTL_L) again, and generation and out-put supply control signal to power supply unit 506, to turn off power supply unit 506.
In the present embodiment, this power control signal (PSON_L) will remain on electronegative potential up to control signal (SIO_ONCTL_L) be transfused to o controller 516 be set at high potential after (3 in the truth table 2), just the output of power control signal can be reset high potential.At this moment, system circuit board 500 will continue to remain on off-mode, even the user presses power switch key, also can't start shooting.And this state will last till to be transfused to up to control signal (SIO_ONCTL_L) and could be started shooting again after o controller 516 is converted to electronegative potential.
In preferred embodiment of the present invention, IOC 516 also can comprise a heat alarm processing unit (not shown), and this heat alarm processing unit processes received heat alarm, and the output control signal.
In preferred embodiment of the present invention, resistance R 3 is for receiving memory voltage, and resistance R 2 is for receiving operating voltage, with the input CLR# of door 520, memory circuit 510, all receive stand-by power supply with door 512, inverter 514.
Comprehensive the above, overheating protection circuit of the present invention and system circuit board can be turned off power supply in the stipulated time, produce central processing unit because of overheated situation about burning out with the overlong time of avoiding powered-down.
Claims (26)
1. an overheating protection circuit is electrically coupled to a power supply unit, and receives a detecting voltage signal, a control signal and a heat alarm, and it is characterized in that: this overheating protection circuit comprises
One receives first logical circuit of detecting voltage signal and heat alarm, so that detecting voltage signal and heat alarm are done computing and exported one first logical signal;
One memory circuit is electrically coupled to first logical circuit, and receives first logical signal and control signal, so that first logical signal and control signal are done computing and exported a latch-up signal; And
One second logical circuit is electrically coupled to above-mentioned memory circuit, and receives latch-up signal and this control signal, so that latch-up signal and control signal are done computing and exported a power control signal;
Wherein, power supply unit is then according to power control signal decision interruption output one operating voltage.
2. overheating protection circuit according to claim 1 is characterized in that: this overheating protection circuit is for electrically being connected to a central processing unit, and this central processing unit lies in when detecting temperature above a default value, exports this overheated signal.
3. overheating protection circuit according to claim 1 is characterized in that: this overheating protection circuit is for being electrically coupled to an IOC.
4. overheating protection circuit according to claim 1; it is characterized in that: this overheating protection circuit is for being electrically coupled to a voltage detection circuit; this voltage detection circuit is one of this power supply unit of a detecting output voltage, in order to obtain and to export this detecting voltage signal.
5. overheating protection circuit according to claim 1, wherein whether this memory circuit system removes this memory circuit according to this control signal decision.
6. overheating protection circuit according to claim 1 is characterized in that: described first logical circuit comprise at least one with door, should and door system receive detecting voltage signal and this overheated signal, in order to export this first logic signal.
7. overheating protection circuit according to claim 1 is characterized in that: described second logical circuit comprise one with door, should and door system receive detecting voltage signal and this overheated signal, in order to export this first logic signal.
8. overheating protection circuit according to claim 1 is characterized in that: described memory circuit comprises a flip-flop, and this flip-flop system receives this first logic signal and this controlling signal, in order to export this breech lock signal.
9. an overheating protection circuit is electrically coupled to a power supply unit, and receives a detecting voltage signal, a control signal and a heat alarm, and it is characterized in that: this overheating protection circuit comprises
One receives first logical circuit of detecting voltage signal and heat alarm, so that detecting voltage signal and heat alarm are done computing and exported one first logical signal;
One inverter, it receives control signal, with control signal anti-phase after, export an anti-phase control signal;
One memory circuit, it is electrically coupled to first logical circuit and inverter, and receives first logical signal and anti-phase control signal, so that first logical signal and anti-phase control signal are done computing and exported a latch-up signal; And
One second logical circuit, it is for being electrically coupled to memory circuit and inverter, and receives this latch-up signal and anti-phase control signal, so that breech lock signal and anti-phase control signal are done computing and exported a power control signal;
Wherein, power supply unit is then according to power control signal decision interruption output one operating voltage.
10. overheating protection circuit according to claim 9 is characterized in that: this overheating protection circuit is for electrically being connected to a central processing unit, and this central processing unit lies in when detecting temperature above a default value, exports this overheated signal.
11. overheating protection circuit according to claim 9 is characterized in that: described inverter is for being electrically coupled to an IOC, in order to receive this controlling signal.
1 2. overheating protection circuits according to claim 9; it is characterized in that: this overheating protection circuit is for being electrically coupled to a voltage detection circuit; this voltage detection circuit is one of this power supply unit of a detecting output voltage, in order to obtain and to export this detecting voltage signal.
13. overheating protection circuit according to claim 9 is characterized in that: described memory circuit is for determining whether remove memory circuit according to control signal.
14. overheating protection circuit according to claim 9 is characterized in that: described first logical circuit comprise at least one with door, should and door system receive detecting voltage signal and this overheated signal, in order to export this first logic signal.
15. overheating protection circuit according to claim 9 is characterized in that: described second logical circuit comprise one with door, should and door system receive detecting voltage signal and this overheated signal, in order to export this first logic signal.
16. overheating protection circuit according to claim 9 is characterized in that: described memory circuit comprises a flip-flop, and this flip-flop system receives this first logic signal and this controlling signal, in order to export this breech lock signal.
17. a system circuit board is characterized in that: this circuit system includes
One central processing unit when detecting temperature above a default value, is exported a heat alarm;
One IOC, it is electrically coupled to central processing unit, to export a control signal according to this overheated signal;
One overheating protection circuit, it is for being electrically coupled to central processing unit and IOC, and receives a detecting voltage signal, this heat alarm and this control signal, and this overheating protection circuit comprises:
One receives first logical circuit of detecting voltage signal and heat alarm, so that detecting voltage signal and this heat alarm are done computing and exported one first logical signal;
One inverter, it receives this control signal, with this control signal anti-phase after, export an anti-phase control signal;
One memory circuit, it reaches and receives first logical signal and anti-phase control signal, so that first logical signal and anti-phase control signal are done computing and exported a latch-up signal for being electrically coupled to first logical circuit and inverter; And
One second logical circuit, it is for being electrically coupled to memory circuit and inverter, and receives latch-up signal and anti-phase control signal, so that latch-up signal and anti-phase control signal are done computing and exported a power control signal; And
One power supply unit, it is electrically coupled to second logical circuit, to export an operating voltage according to power control signal decision interruption.
18. system circuit board according to claim 17 is characterized in that: comprise a voltage detection circuit.
19. system circuit board according to claim 17 is characterized in that: described memory circuit is that whether decision removes memory circuit according to control signal.
20. system circuit board according to claim 17 is characterized in that: described first logical circuit comprise at least one with the door.
21. system circuit board according to claim 17 is characterized in that: described second logical circuit comprise one with the door.
22. system circuit board according to claim 17, wherein this memory circuit comprises a flip-flop, this flip-flop.
23. system circuit board according to claim 17 is characterized in that: described IOC comprises a heat alarm processing unit
24. a system circuit board is characterized in that: this system circuit board includes
One central processing unit when detecting temperature above a default value, is exported a heat alarm;
One IOC, it is electrically coupled to central processing unit, in order to export a control signal according to heat alarm;
One overheating protection circuit, it is electrically coupled to central processing unit and IOC, and receives a detecting voltage signal, heat alarm and control signal, and this overheating protection circuit comprises:
One receives first logical circuit of detecting voltage signal and heat alarm, and it is done computing and export one first logical signal with corresponding voltage detection signal and heat alarm;
One memory circuit, it is electrically coupled to first logical circuit, and receives first logical signal and anti-phase control signal, does computing and exports a latch-up signal with corresponding first logical signal and control signal; And
One second logical circuit, it is electrically coupled to memory circuit, and receives latch-up signal and control signal, so that latch-up signal and control signal are done computing and exported a power control signal; And
One power supply unit, it is electrically coupled to second logical circuit, to export an operating voltage according to power control signal decision interruption.
25. system circuit board according to claim 23 is characterized in that: more comprise a voltage detection circuit.
26. system circuit board according to claim 23 is characterized in that: described IOC comprises a heat alarm processing unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100251537A CN100521433C (en) | 2006-03-28 | 2006-03-28 | Overheat protection circuit and system circuit board |
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|---|---|---|---|
| CNB2006100251537A CN100521433C (en) | 2006-03-28 | 2006-03-28 | Overheat protection circuit and system circuit board |
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| CN101047310A true CN101047310A (en) | 2007-10-03 |
| CN100521433C CN100521433C (en) | 2009-07-29 |
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| CN101552455A (en) * | 2008-03-31 | 2009-10-07 | 上海松下微波炉有限公司 | Method and device for leakage protection method of microwave oven |
| CN101763156B (en) * | 2008-12-25 | 2011-11-09 | 英业达股份有限公司 | Computer system and power supply control device thereof |
| CN101552456B (en) * | 2008-03-31 | 2012-06-27 | 群联电子股份有限公司 | Hot plug electronic device with high use safety and overheating protection device thereof |
| CN102780207A (en) * | 2011-05-09 | 2012-11-14 | 鸿富锦精密工业（深圳）有限公司 | Voltage protection system and voltage protection method |
| CN103455093A (en) * | 2012-06-04 | 2013-12-18 | 深圳市凯利华电子有限公司 | Tablet computer |
| CN106209062A (en) * | 2015-04-20 | 2016-12-07 | 新唐科技股份有限公司 | Input/output buffer circuit |
| CN111064163A (en) * | 2019-10-21 | 2020-04-24 | 张国基 | Management chip system for abnormal temperature of circuit board |
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- 2006-03-28 CN CNB2006100251537A patent/CN100521433C/en not_active Expired - Fee Related
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| CN101552455A (en) * | 2008-03-31 | 2009-10-07 | 上海松下微波炉有限公司 | Method and device for leakage protection method of microwave oven |
| CN101552456B (en) * | 2008-03-31 | 2012-06-27 | 群联电子股份有限公司 | Hot plug electronic device with high use safety and overheating protection device thereof |
| CN101552455B (en) * | 2008-03-31 | 2014-03-26 | 上海松下微波炉有限公司 | Method and device for leakage protection method of microwave oven |
| CN101763156B (en) * | 2008-12-25 | 2011-11-09 | 英业达股份有限公司 | Computer system and power supply control device thereof |
| CN102780207A (en) * | 2011-05-09 | 2012-11-14 | 鸿富锦精密工业（深圳）有限公司 | Voltage protection system and voltage protection method |
| CN102780207B (en) * | 2011-05-09 | 2017-03-15 | 中山市云创知识产权服务有限公司 | voltage protection system and method |
| CN103455093A (en) * | 2012-06-04 | 2013-12-18 | 深圳市凯利华电子有限公司 | Tablet computer |
| CN106209062A (en) * | 2015-04-20 | 2016-12-07 | 新唐科技股份有限公司 | Input/output buffer circuit |
| CN106209062B (en) * | 2015-04-20 | 2020-02-14 | 新唐科技股份有限公司 | Input/output buffer circuit |
| CN111064163A (en) * | 2019-10-21 | 2020-04-24 | 张国基 | Management chip system for abnormal temperature of circuit board |
| CN111064163B (en) * | 2019-10-21 | 2022-03-11 | 张国基 | Management chip system for abnormal temperature of circuit board |
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| CN100521433C (en) | 2009-07-29 |
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