TWI396356B - Adaptation circuit of power supply - Google Patents
Adaptation circuit of power supply Download PDFInfo
- Publication number
- TWI396356B TWI396356B TW96151222A TW96151222A TWI396356B TW I396356 B TWI396356 B TW I396356B TW 96151222 A TW96151222 A TW 96151222A TW 96151222 A TW96151222 A TW 96151222A TW I396356 B TWI396356 B TW I396356B
- Authority
- TW
- Taiwan
- Prior art keywords
- power
- terminal
- power supply
- connector
- switching element
- Prior art date
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
Description
本發明係關於一種電源適配電路。 The present invention relates to a power supply adaptation circuit.
電源係電腦之功率部件，電腦中每個部件之電能均來源於電源，它係保證電腦硬體正常運作最基本之前提，電源之好壞直接影響著電腦能否正常運行。 The power supply is the power component of the computer. The power of each component in the computer is derived from the power supply. It is necessary to ensure that the normal operation of the computer hardware is normal. The quality of the power supply directly affects whether the computer can operate normally.
電腦電源發展到現在主要有ATX電源和BTX電源兩大類型。 Computer power development has now mainly two types of ATX power and BTX power.
ATX電源係目前PC之標準電源。它除了具備必需之±5V、±12V四路電壓輸出，還有+3.3V電壓提供給主機板，以及+5V_SB(Stand By，輔助)電壓用作啟動電壓。此外，還有一個用於接收一電平訊號之PS_ON(Power Supply-ON，電源開機)訊號引腳以及一個PWR_GOOD(Power Good，電源正常)訊號引腳。 The ATX power supply is the standard power supply for current PCs. In addition to the required ±5V, ±12V four-way voltage output, +3.3V voltage is supplied to the motherboard, and +5V_SB (Standby) voltage is used as the startup voltage. In addition, there is a PS_ON (Power Supply-ON) signal pin for receiving a level signal and a PWR_GOOD (Power Good) signal pin.
從ATX電源規範知，當電源處於正常工作狀態時，主機板提供電平訊號使電源PS_ON訊號引腳為低電平，電源之所有電壓都正常輸出，同時輸出高電平PWR_GOOD訊號給主機板，其中PWR_GOOD訊號5V_SYS，3.3V_SYS，+12V電壓在時序上延時100-500ms。而在待機狀態時，主機板提供電平訊號使電源之PS_ON訊號引腳為高電平，此時電源只提供+5V_SB電壓，其餘5V_SYS、3.3V_SYS、+12V等電壓均停止輸出，同時輸出之PWR_GOOD訊號需要立即轉為低電平。 According to the ATX power supply specification, when the power supply is in normal working state, the motherboard provides a level signal to make the power PS_ON signal pin low, all the voltages of the power supply are normally output, and the high-level PWR_GOOD signal is output to the motherboard. The PWR_GOOD signal 5V_SYS, 3.3V_SYS, +12V voltage is delayed by 100-500ms in timing. In the standby state, the motherboard provides a level signal to make the PS_ON signal pin of the power supply high. At this time, the power supply only supplies +5V_SB voltage, and the remaining 5V_SYS, 3.3V_SYS, +12V voltages are stopped, and the output is simultaneously output. The PWR_GOOD signal needs to go low immediately.
當主機板研發完成投入市場後，用戶可能會採用各種不廠家之產品離散性差異，可能會導致主機板在搭配某種電源時出現不能工作之情況，亦即主機板與電源不相容。造成這種不相容之原因有二，其一係時序之延時不匹配或電壓不匹配；其二係不同之主機板晶片會有不同之PWR_GOOD電壓，例如從ATX電源發出一個PWR_GOOD訊號為5V TTL(Transistor-Transistor Logic)之電平，在主機板上該電平通常用作主機板晶片之啟動電壓，而有些晶片之啟動電壓為3.3V，因此從電源發出之PWR_GOOD訊號不能啟動主機板上之3.3V晶片，造成主機板不能開機。 After the development of the motherboard is put into the market, the user may adopt various discrete product differences, which may cause the motherboard to be inoperable when it is matched with a certain power supply, that is, the motherboard is incompatible with the power supply. There are two reasons for this incompatibility. The delay of one series of timings does not match or the voltage does not match. The two different motherboard chips will have different PWR_GOOD voltages, for example, a PWR_GOOD signal from the ATX power supply is 5V TTL. (Transistor-Transistor Logic) level, this level is usually used as the starting voltage of the motherboard chip on the motherboard, and some chips have a starting voltage of 3.3V, so the PWR_GOOD signal sent from the power supply cannot be started on the motherboard. The 3.3V chip causes the motherboard to fail to boot.
鑒於以上內容，有必要提供一種能為主機板提供兩種不同電壓之電源正常訊號之電源適配電路。 In view of the above, it is necessary to provide a power supply adaptation circuit capable of providing two different voltage power supply signals for the motherboard.
一種電源適配電路，包括一電源連接器、一第一開關元件、一第二開關元件、一第一電源端、一第二電源端、一第一傳輸線、一第二傳輸線、一電阻和一輸出端，該電源連接器包括一電源正常訊號引腳和一電壓引腳，該兩開關元件均包括一第一端、一第二端和一第三端；該第二開關元件之第一端與該電源連接器之電源正常訊號引腳相連，該第二開關元件之第二端透過該電阻與該電源連接器之電壓引腳相連；該第一開關元件之第一端與該第二開關元件之第二端相連，該第一開關元件之第二端可選擇性地藉由一連接元件使該第一傳輸線與該第一電源端電性連通，或使該第二傳輸線與該第二電源端電性連通，該第一開關元件之第二端還與該輸出端相連；該兩開關元件之第三端均接地；當該電源連接器之電源正常訊號引腳輸出高電平時，該第二開關元件導通，該第一開關元件截止，使該輸出端輸出該第一電源端或該第二電源端之電壓。 A power adapter circuit includes a power connector, a first switching component, a second switching component, a first power terminal, a second power terminal, a first transmission line, a second transmission line, a resistor, and a The power connector includes a power normal signal pin and a voltage pin, the two switching elements each include a first end, a second end and a third end; the first end of the second switching element Connected to the power good signal pin of the power connector, the second end of the second switching element is connected to the voltage pin of the power connector through the resistor; the first end of the first switching element and the second switch The second end of the first switching element is connected to the second end of the first switching element, wherein the first transmission line is electrically connected to the first power supply end, or the second transmission line is connected to the second The power supply end is electrically connected, and the second end of the first switching element is further connected to the output end; the third ends of the two switching elements are grounded; when the power supply normal signal pin of the power connector outputs a high level, the Second switching element guide The first switching element is turned off, so that the output terminal of the first power supply terminal or the voltage of the second power supply terminal.
相較習知技術，該電源適配電路，利用該第一開關元件之第二端根據主機 板晶片啟動電壓之需求可選擇性地連接到該第一電源端或該第二電源端之特點，來為該輸出端提供一合適電壓訊號作為主機板晶片之啟動電壓訊號，以此滿足不同類型主機板晶片啟動電壓之要求，從而提高了主機板對電源之相容性。 Compared with the prior art, the power adapter circuit utilizes the second end of the first switching component according to the host The requirement of the board chip starting voltage can be selectively connected to the first power terminal or the second power terminal to provide a suitable voltage signal for the output terminal as the starting voltage signal of the motherboard chip, thereby satisfying different types. The motherboard chip starts voltage requirements, which improves the compatibility of the motherboard with the power supply.
H‧‧‧電源連接器 H‧‧‧Power connector
Q1‧‧‧第一電晶體 Q1‧‧‧First transistor
Q2‧‧‧第二電晶體 Q2‧‧‧Second transistor
Q3‧‧‧第三電晶體 Q3‧‧‧ Third transistor
R1‧‧‧第一電阻 R1‧‧‧first resistance
R2‧‧‧第二電阻 R2‧‧‧second resistance
R3‧‧‧第三電阻 R3‧‧‧ third resistor
10‧‧‧第一傳輸線 10‧‧‧First transmission line
20‧‧‧第二傳輸線 20‧‧‧second transmission line
V1‧‧‧第一電源端 V1‧‧‧ first power terminal
V2‧‧‧第二電源端 V2‧‧‧second power terminal
PG‧‧‧輸出端 PG‧‧‧ output
C‧‧‧電容 C‧‧‧ capacitor
PWR_GOOD‧‧‧電源正常訊號引腳 PWR_GOOD‧‧‧Power Normal Signal Pin
PS_ON‧‧‧電源開機訊號引腳 PS_ON‧‧‧Power boot signal pin
圖1係本發明電源適配電路之較佳實施方式之電路圖。 1 is a circuit diagram of a preferred embodiment of a power adapter circuit of the present invention.
請參考圖1，本發明電源適配電路之較佳實施方式包括一電源連接器H、一第一電晶體Q1、一第二電晶體Q2、一第三電晶體Q3、一第一電阻R1、一第二電阻R2、一第三電阻R3、一第一電源端V1、一第二電源端V2、一第一傳輸線10、一第二傳輸線20、一電容C和一輸出端PG。在本較佳實施方式中電源連接器H為一ATX24PIN連接器，其包括一電源開機訊號引腳PS_ON、一電源正常訊號引腳PWR_GOOD及一5V電壓引腳；該三個電晶體均為NPN型電晶體且均包括一第一端、一第二端及一第三端，該第一、第二及第三端分別為基極、集極及射極。 Referring to FIG. 1 , a preferred embodiment of the power adapter circuit of the present invention includes a power connector H, a first transistor Q1, a second transistor Q2, a third transistor Q3, and a first resistor R1. a second resistor R2, a third resistor R3, a first power terminal V1, a second power terminal V2, a first transmission line 10, a second transmission line 20, a capacitor C and an output terminal PG. In the preferred embodiment, the power connector H is an ATX24 PIN connector, which includes a power-on signal pin PS_ON, a power-good signal pin PWR_GOOD, and a 5V voltage pin; the three transistors are of the NPN type. The transistors each include a first end, a second end and a third end, and the first, second and third ends are a base, a collector and an emitter, respectively.
該第二電晶體Q2之基極透過該第二電阻R2與該電源連接器H之電源正常訊號引腳PWR_GOOD相連；集極透過該第一電阻R1與該電源連接器H之5V電壓引腳相連。該第一電晶體Q1之基極與該第二電晶體Q2之集極相連；集極藉由在該第一傳輸線10之斷開部分上連接一連接元件與該第一電源端V1電性連通，或藉由在該第二傳輸線20之斷開部分上連接一連接元件與該第二電源端V2電性連通，並透過該電容C接地，還與該輸出端PG相連。該第三電晶體Q3之基極透過該第三電阻R3與該電源連接器H之電源開機訊號引腳PS_ON相連；集極與該輸出端PG相連。該三個電晶體之射極均接地。 The base of the second transistor Q2 is connected to the power normal signal pin PWR_GOOD of the power connector H through the second resistor R2; the collector is connected to the 5V voltage pin of the power connector H through the first resistor R1. . The base of the first transistor Q1 is connected to the collector of the second transistor Q2; the collector is electrically connected to the first power terminal V1 by connecting a connecting component to the disconnected portion of the first transmission line 10. Or electrically connected to the second power terminal V2 by connecting a connecting component to the disconnected portion of the second transmission line 20, and connected to the output terminal PG through the capacitor C. The base of the third transistor Q3 is connected to the power-on signal pin PS_ON of the power connector H through the third resistor R3; the collector is connected to the output terminal PG. The emitters of the three transistors are all grounded.
該電源連接器H用於連接一ATX電源；該第一電晶體Q1、第二電晶體Q2及第 三電晶體Q3起到控制開關之作用；該第一電阻R1為上拉電阻，該第二電阻R2及第三電阻R3均為限流電阻；該電容C為濾波電容；該第一電源端V1為ATX電源之3.3V_SYS端；該第二電源端V2為ATX電源之5V_SYS端；該連接元件為電阻；該輸出端PG用於向主機板輸出一啟動電壓訊號。 The power connector H is used for connecting an ATX power supply; the first transistor Q1, the second transistor Q2, and the first The third transistor Q3 functions as a control switch; the first resistor R1 is a pull-up resistor, and the second resistor R2 and the third resistor R3 are current limiting resistors; the capacitor C is a filter capacitor; the first power terminal V1 It is the 3.3V_SYS terminal of the ATX power supply; the second power supply terminal V2 is the 5V_SYS terminal of the ATX power supply; the connection component is a resistor; the output terminal PG is used to output a startup voltage signal to the motherboard.
本發明電源適配電路之工作原理如下：當主機板晶片之啟動電壓要求為3.3V時，先在該第一傳輸線10之斷開部分上焊接一電阻，使該第一電晶體Q1之集極與該第一電源端V1電性連通，該第二傳輸線20之斷開部分空接。電腦開機後，該電源連接器H之電源開機訊號引腳PS_ON為低電平，透過該第三電阻R3後使得該第三電晶體Q3截止；同時該電源連接器H之電源正常訊號引腳PWR_GOOD之輸出電壓為高電平，透過該第二電阻R2後使得該第二電晶體Q2導通，該第二電晶體Q2之集極變為低電平，故該第一電晶體Q1之基極為低電平，該第一電晶體Q1截止，此時，該輸出端PG直接將該第一電源端V1之3.3V電平輸出給主機板。同理，當主機板晶片之啟動電壓要求為5V時，先在該第二傳輸線20之斷開部分上焊接一電阻，使第一電晶體Q1之集極與該第二電源端V2電性連通，該第一傳輸線10之斷開部分空接。電腦開機後，該輸出端PG直接將該第二電源端V2之5V電平輸出給主機板。 The working principle of the power adapter circuit of the present invention is as follows: when the starting voltage of the motherboard chip is required to be 3.3V, a resistor is first soldered on the disconnected portion of the first transmission line 10 to make the collector of the first transistor Q1 The first power supply terminal V1 is in electrical communication, and the disconnected portion of the second transmission line 20 is vacant. After the computer is turned on, the power-on signal pin PS_ON of the power connector H is low, and the third transistor Q3 is turned off after the third resistor R3; and the power connector of the power connector H is normally signal pin PWR_GOOD The output voltage is at a high level. After the second resistor R2 is passed, the second transistor Q2 is turned on, and the collector of the second transistor Q2 is turned to a low level. Therefore, the base of the first transistor Q1 is extremely low. The first transistor Q1 is turned off. At this time, the output terminal PG directly outputs the 3.3V level of the first power terminal V1 to the motherboard. Similarly, when the starting voltage of the motherboard chip is required to be 5V, a resistor is first soldered on the disconnected portion of the second transmission line 20, so that the collector of the first transistor Q1 is electrically connected to the second power terminal V2. The disconnected portion of the first transmission line 10 is vacant. After the computer is turned on, the output terminal PG directly outputs the 5V level of the second power terminal V2 to the motherboard.
當電腦關機時，該電源連接器H之電源正常訊號引腳PWR_GOOD之輸出電壓迅速由高電平變為低電平，該第二電晶體Q2截止，其集極變為高電平，該第一電晶體Q1導通，該輸出端PG輸出給主機板之電平將為低電平，在相位上與該電源連接器H之電源正常訊號引腳PWR_GOOD之輸出訊號係相同的，能滿足ATX電源規範。然經過使用與測試發現，當有些電源品質較差時，該電源連接器H之電源正常訊號引腳PWR_GOOD之輸出電壓從高電平掉到低電平後經過很小一段時間又立刻反彈為高電平，使得時序上出現 混亂。為了避免在關機時，該電源連接器H之電源正常訊號引腳PWR_GOOD輸出訊號之反彈，在本該較佳實施方式中加入了由該第電晶體Q3與該第三電阻R3組成之加速放電回路。該加速放電回路之工作原理為：當關機時，該電源連接器H之電源開機訊號引腳PS_ON之輸出電壓由低電平變為高電平，該電晶體Q3迅速導通，使該輸出端PG輸出之電壓立即變為低電平，且無論該電源連接器H之電源正常訊號引腳PWR_GOOD之訊號係否發生抖動，該輸出端PG之輸出訊號始終為低電平，從而有效解決了電平抖動現象。 When the computer is turned off, the output voltage of the power supply signal pin PWR_GOOD of the power connector H rapidly changes from a high level to a low level, the second transistor Q2 is turned off, and its collector becomes a high level. When the transistor Q1 is turned on, the output of the output terminal PG to the motherboard is low, and the phase is the same as the output signal of the power signal pin PWR_GOOD of the power connector H, which can satisfy the ATX power supply. specification. After use and testing, it was found that when some power supply quality is poor, the output voltage of the power supply connector PWR_GOOD of the power connector H drops from a high level to a low level and immediately rebounds to a high level after a short period of time. Flat, making timing appear confusion. In order to avoid the rebound of the power signal pin PWR_GOOD output signal of the power connector H during shutdown, an accelerated discharge circuit composed of the first transistor Q3 and the third resistor R3 is added in the preferred embodiment. . The working principle of the accelerating discharge circuit is: when the power is turned off, the output voltage of the power-on signal pin PS_ON of the power connector H changes from a low level to a high level, and the transistor Q3 is turned on rapidly, so that the output terminal PG The output voltage immediately goes to a low level, and regardless of whether the signal of the power supply pin signal PWR_GOOD of the power connector H is dithered, the output signal of the output terminal PG is always low level, thereby effectively solving the level. Jitter phenomenon.
上述電源適配電路，利用該第一電晶體Q1之集極根據主機板晶片啟動電壓之需求可選擇性地連接到該第一電源端V1或該第二電源端V2之特點，來為該輸出端PG提供一合適之電壓訊號作為主機板晶片之啟動電壓訊號，以此滿足不同類型主機板晶片啟動電壓之要求，並藉由該第三電晶體Q3導通時構成之加速放電電路，有效地解決了該輸出端PG輸出電壓波形之抖動，提高了主機板對電源之相容性。 The power adapter circuit is characterized in that the collector of the first transistor Q1 is selectively connected to the first power terminal V1 or the second power terminal V2 according to the requirement of the motherboard chip startup voltage. The terminal PG provides a suitable voltage signal as the starting voltage signal of the motherboard chip to meet the requirements of the starting voltage of different types of motherboard chips, and effectively solves the problem by the accelerated discharge circuit formed when the third transistor Q3 is turned on. The jitter of the output voltage waveform of the output terminal PG improves the compatibility of the motherboard with the power supply.
需要說明的是，該電源連接器H不限於ATX 24PIN連接器，其他具有類似功能之電源連接器，例如ATX 20PIN連接器亦可；該三個開關元件不限於該三個NPN型之電晶體，其他類型之電晶體、場效電晶體或電子開關亦可；該連接元件亦不限於電阻；若該第一、第三開關元件為MOSFET，則該第二電阻R2及第三電阻R3可省略。若該電源適配電路的自身性能較好或為了進一步節省成本，則該濾波電容C可省略。 It should be noted that the power connector H is not limited to the ATX 24 PIN connector, and other power connectors having similar functions, such as an ATX 20 PIN connector; the three switching components are not limited to the three NPN type transistors. Other types of transistors, field effect transistors or electronic switches may also be used; the connecting element is not limited to the resistor; if the first and third switching elements are MOSFETs, the second resistor R2 and the third resistor R3 may be omitted. The filter capacitor C may be omitted if the power adapter circuit has better performance or for further cost savings.
綜上所述，本發明符合發明專利要件，爰依法提出專利申請。惟，以上所述者僅為本發明之較佳實施例，舉凡熟悉本案技藝之人士，在爰依本發明精神所作之等效修飾或變化，皆應涵蓋於以下之申請專利範圍內。 In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.
H‧‧‧電源連接器 H‧‧‧Power connector
Q1‧‧‧第一電晶體 Q1‧‧‧First transistor
Q2‧‧‧第二電晶體 Q2‧‧‧Second transistor
Q3‧‧‧第三電晶體 Q3‧‧‧ Third transistor
R1‧‧‧第一電阻 R1‧‧‧first resistance
R2‧‧‧第二電阻 R2‧‧‧second resistance
R3‧‧‧第三電阻 R3‧‧‧ third resistor
10‧‧‧第一傳輸線 10‧‧‧First transmission line
20‧‧‧第二傳輸線 20‧‧‧second transmission line
V1‧‧‧第一電源端 V1‧‧‧ first power terminal
V2‧‧‧第二電源端 V2‧‧‧second power terminal
PG‧‧‧輸出端 PG‧‧‧ output
C‧‧‧電容 C‧‧‧ capacitor
PWR_GOOD‧‧‧電源正常訊號引腳 PWR_GOOD‧‧‧Power Normal Signal Pin
PS_ON‧‧‧電源開機訊號引腳 PS_ON‧‧‧Power boot signal pin
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW96151222A TWI396356B (en) | 2007-12-31 | 2007-12-31 | Adaptation circuit of power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW96151222A TWI396356B (en) | 2007-12-31 | 2007-12-31 | Adaptation circuit of power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| TW200929787A TW200929787A (en) | 2009-07-01 |
| TWI396356B true TWI396356B (en) | 2013-05-11 |
Family
ID=44864648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW96151222A TWI396356B (en) | 2007-12-31 | 2007-12-31 | Adaptation circuit of power supply |
Country Status (1)
| Country | Link |
|---|---|
| TW (1) | TWI396356B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI411911B (en) * | 2010-03-29 | 2013-10-11 | Zippy Tech Corp | Improve the standby power consumption of the power circuit |
| CN111667785B (en) * | 2020-07-07 | 2023-11-14 | 京东方科技集团股份有限公司 | Control circuit, Tcon board and display device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4730122A (en) * | 1986-09-18 | 1988-03-08 | International Business Machines Corporation | Power supply adapter systems |
| TW473729B (en) * | 2000-01-04 | 2002-01-21 | Via Tech Inc | Motherboard for automatically outputting appropriate voltage source and the method thereof |
| US20020057019A1 (en) * | 1999-01-21 | 2002-05-16 | Dell U.S.A., L.P. | Automatic power supply selector for a ACPI-compliant PCI devices |
| US20050132236A1 (en) * | 2003-12-12 | 2005-06-16 | Karthigan Srinivasan | Power control unit that provides one of a plurality of voltages on a common power rail |
| CN1797950A (en) * | 2004-12-30 | 2006-07-05 | 鸿富锦精密工业（深圳）有限公司 | Signal generation circuit |
| CN2909367Y (en) * | 2005-12-30 | 2007-06-06 | 鸿富锦精密工业（深圳）有限公司 | Plate power supply protection circuit |
| US20070157033A1 (en) * | 2005-12-30 | 2007-07-05 | Hon Hai Precision Industry Co., Ltd. | Circuit for protecting motherboard |
| CN200990055Y (en) * | 2006-12-22 | 2007-12-12 | 鸿富锦精密工业（深圳）有限公司 | Main board power supply protection circuit |
| CN200990056Y (en) * | 2006-12-22 | 2007-12-12 | 鸿富锦精密工业（深圳）有限公司 | Main board protection circuit |
-
2007
- 2007-12-31 TW TW96151222A patent/TWI396356B/en not_active IP Right Cessation
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4730122A (en) * | 1986-09-18 | 1988-03-08 | International Business Machines Corporation | Power supply adapter systems |
| US20020057019A1 (en) * | 1999-01-21 | 2002-05-16 | Dell U.S.A., L.P. | Automatic power supply selector for a ACPI-compliant PCI devices |
| TW473729B (en) * | 2000-01-04 | 2002-01-21 | Via Tech Inc | Motherboard for automatically outputting appropriate voltage source and the method thereof |
| US20050132236A1 (en) * | 2003-12-12 | 2005-06-16 | Karthigan Srinivasan | Power control unit that provides one of a plurality of voltages on a common power rail |
| CN1797950A (en) * | 2004-12-30 | 2006-07-05 | 鸿富锦精密工业（深圳）有限公司 | Signal generation circuit |
| CN2909367Y (en) * | 2005-12-30 | 2007-06-06 | 鸿富锦精密工业（深圳）有限公司 | Plate power supply protection circuit |
| US20070157033A1 (en) * | 2005-12-30 | 2007-07-05 | Hon Hai Precision Industry Co., Ltd. | Circuit for protecting motherboard |
| CN200990055Y (en) * | 2006-12-22 | 2007-12-12 | 鸿富锦精密工业（深圳）有限公司 | Main board power supply protection circuit |
| CN200990056Y (en) * | 2006-12-22 | 2007-12-12 | 鸿富锦精密工业（深圳）有限公司 | Main board protection circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200929787A (en) | 2009-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6091617A (en) | Automatic power supply selector for ACPI-compliant PCI devices | |
| US7590878B2 (en) | Circuit and method for protecting motherboard | |
| US6691201B1 (en) | Dual mode USB-PS/2 device | |
| US7839188B2 (en) | Circuit for clearing CMOS information | |
| JPH11175456A (en) | Computer system | |
| CN101539900B (en) | Device for solving conflict generated between two I<2>C slave devices with same addressing address | |
| US20130181660A1 (en) | Charge control circuit for usb device | |
| US20120021696A1 (en) | Data card with usb function | |
| CN101359247B (en) | Power adapter circuit for motherboard | |
| TW201327123A (en) | Circuit for starting up plural electronic devices in an orderly manner | |
| US8201003B2 (en) | Circuit for preventing computer power down sequence failure | |
| US20060145731A1 (en) | Signal generating circuit | |
| JPH0322118A (en) | Method and device for rapid interconnection with computer-bus | |
| TWI396356B (en) | Adaptation circuit of power supply | |
| TWI479320B (en) | Touch module switch circuit for all in one computer | |
| TW201243555A (en) | Power supply adaptor circuit | |
| TW200426577A (en) | Test card for multiple functions testing | |
| TWI444817B (en) | Computer device | |
| US20120179930A1 (en) | Motherboard having time delay circuit for delaying pson signal | |
| CN101470502B (en) | Power supply adaptation circuit | |
| TWI798721B (en) | Boot control circuit of computer system | |
| CN109960677B (en) | Extension circuit for USB interface | |
| GB2556688A (en) | Interface assembly for the connecting of a peripheral device to an interface of a host system, method and electronic device, in particular computer system | |
| CN112799986B (en) | Universal serial bus switching circuit and related electronic device | |
| WO2021159526A1 (en) | Integrated circuit, and control method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |