1358634 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種主機板電源適配電路。 【先前技術】 電源係電腦之功率部件，電腦中每個部件之電能來源都 係依靠電源，它係保證電腦硬體正常運作最基本之前提，可 以說電源係電腦之心臟。電腦中母一個配件都有·一定功耗* 需要電壓高低不等之直流電，電源之主要功能係將外部之交 流電.（AC )轉換成符合電腦需求之直流電（DC )，功能類似 於小型電器用來連接市電之交流電適配器。不同之處在於 PC ( Personal Computer，個人電腦）之電源要求有個相對固 定之標準，不像適配器僅僅適合特定之電器，並且電源之工 作流程相對複雜一點，所以電源之好壞直接影響著電腦能否 正常運行，在電腦之研發、生產、檢測等過程中都需要對電 源之電壓、電流等工作參數進行測試。 電腦電源發展到現在主要有ATX電源和BTX電源兩大 類型。 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+5 V_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位訊號之 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。 從’ATX電源規範可知，當電源處於正常工作狀態時， 7 .主機板提供電位訊號使電源之p 雷、7?夕祕士办r如 訊號引腳為低電位， 電源之所有電壓都正常輪 PWR ΓΌΠΓ4 ->τι ’同時輸出南電位之 PWR_G〇OD訊號給主機板， ς\/ cvc 〇 . 為中PWR GOOD訊號比 5V一SYS，3.3V_SYS，+12V 電屨— 一 品/·仗泌仙作+ u 笑在時序上延時100-500ms 〇 而在待機狀態時’主機板提供翁 21 ^ _ 兒位訊號使電源之PS_ON訊 號引腳為鬲電位，此時電源0 、軚供+5V SB電壓，其餘 5V一SYS、3.3V SYS、+12V 等電厥 +A — - f%堡均停止輸出，同時輸出之 PWR一GOOD訊號需要立即轉為低電位。 當主機板研發完成投人市場後，用戶可能會採用各種不 同之ATX電源，由於各個不同電源生產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，即主機板與電源不相容，而造成這種情況之原因之—係 由於ATX電源發出之PWR—GOOD訊號之時序不對或電壓不 穩定，不能滿足需要；另一原因係從ATX電源發出之 PWR_GOOD 訊號係一個 5V TTL ( Transistor-Transistor $ Logic )電位，在主機板上該電位通常用來作為主機板上晶 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。 【發明内容】 鑒於以上内容，有必要提供一種主機板電源適配電路， 以同時為主機板提供兩種電壓之電源正常訊號以啟動主機 板上之晶片，提高主機板對電源之相容性，並且保證電源正 常訊號之電壓及時序滿足需要。 13-58634 一；種主機板電源適配電路，包括一電源連接哭， 議訊號引腳、一提供啟動電麗訊號之電；正常二 第聊=弟一電壓引腳;—電子開關，其包括第二、第二： 弟一知，该第一端與該電源連接 接，第二端與該電源連接哭之，正^t開機訊號引腳連 鳊接地，一二極體，其陰極盥該 弟一 引腳連接，陽極透過一第—電阻的：：電源正常訊號 弓丨腳連接並透過一第一電容接地:和:輸=器：第-電壓 之陽極連接以獲得另一啟動電壓訊號。 〃該一極體 上述主機板電源適配電路， 號控制該另-啟動電麼訊號之產生出之電源正常訊 提供兩種電壓之電源正常訊號以啟動：：:時為主機板 主機板對電源之相容性。 之晶片，提高 【實施方式】 ’考® 1 ’本發明主機板電源適配電路之較佳 #匕括一電源連接器H、一電子開關q、— 、方式 R1和R2、忐雪六< 性遐ΰ、兩電阻 兩電谷C4C2以及—輪㈣ 盗Η為- ATX24PIN連接器，用於連接—=源連接 括一電源開機訊號引腳PS 〇N、— 電源，其包 續―GOOD、- 3.3V電壓引腳及一 5v電壓=號引腳 開關Q包括第一、第-和笛一姐電反引腳。該電子 .R ^ 和 在本較佳實施方式中哕雷 4關Q為一 N通道場效電晶體，該第一 δ"電 分別為閘極、汲極和源極。 弟一和第三端 該電子開關Q之第一端與該電源連接器Η之電源開機 9 1358634 訊號引腳PS-〇N連接，第二端與該電源連接器H之電源正 ：常訊號引腳PWR—GOOD連接，第三端接地。該二極體D之 •陰極與該電源連接器Η之電源正常訊號引腳p\VR—GOOD連 接’該二極體D之陽極透過該電阻ri與該電源連接器η之 3.3V電壓引腳連接並透過該電容C1接地，該輪出端？(}與 該二極體D之陽極連接以獲得一啟動電壓訊號，並輸出給主 機板’該電源連接器Η之電源正常訊號引腳PWR_G00D還 _透過該電阻R2與該5V電壓引腳連接並透過該電容C2接地。 其中，由於ATX電源規範中該電源正常訊號引腳 PWR_GOOD產生訊號之上升延遲小於i〇ms’因此該電阻 R1與電容C1組成之rc電路之延遲時間要小於10ms，使該 輸出端PG輸出之啟動電壓訊號滿足ATX電源規範。 因為邏輯高電位之範圍為2.4V~5V，因此當該電源正常 訊號引腳PWR_GOOD產生之電壓訊號處於2.4V〜3.3V時雖 然仍係高電位’該二極體D仍會導通，導致該輸出端PG輸 鲁出之啟動電壓訊號無法滿足主機板需要，因此，該電阻r2， 電容C2及5V電壓引腳用來拉高該電源正常訊號弓丨腳 PWR_GOOD產生之5V TTL電壓訊號，確保高電位時該二 極體D不會導通。 主機板開機時’該電源連接器Η之電源開機訊號引腳 PS—ON為低電位’該電子開關Q截止，此時該電源連接器η 之電源正常訊號引腳PWR_GOOD之輸出電壓也為低電位， 該二極體D導通，該輸出端PG輸出之啟動電壓訊號也為低 電位。延時100-500ms後（ATX電源規範），該電源正常訊 1358634 號引腳PWR_GOOD輸出5V TTL電位，此時該二極體D截 止，該3.3V電壓透過電阻R1給電容Cl充電，當該電容Cl 充電完成後，該輸出端PG輸出之啟動電壓訊號為3.3V，並 且在時序上滿足ATX電源規範。 當主機板關機或待機狀態時’該電源連接器Η之電源開 機訊號引腳PS_ON為高電位，此時該電子開關Q導通，同 時該二極體D也導通，該輸出端PG輸出之啟動電壓訊號立 即被拉成低電位，並且由於電子開關Q及二極體D之回應 時間極短，因此電壓跳變之時間滿足ATX規範。 上述主機板電源適配電路可在主機板開機後透過該電 源連楱器Η之電源正常訊號引腳PWR_GOOD提供常規之 5V TTL電壓訊號作為主機板晶片之啟動電壓訊號，同時透 過該該輸出端PG提供一 3.3V電壓訊號作為主機板晶片之啟 動電壓訊號，以此滿足主機板上不同類型晶片之啟動電壓要 求，並且在時序上滿足ATX電源規範。 該電源連接器Η不限於ATX 24PIN連接器，其他類型 電源連接器，例如ATX 20ΡΙΝ連接器亦可。該電子開關Q 也可採用ΝΡΝ電晶體或其它類型電子開關。 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内。 【圖式簡單說明】 圖1係本發明主機板電源適配電路之較佳實施方式的電 11 1358634 路圖。 【主要元件符號說明】1358634 IX. Description of the Invention: [Technical Field] The present invention relates to a motherboard power supply adaptation circuit. [Prior Art] The power supply is the power component of the computer. The power source of each component in the computer depends on the power supply. It is the most basic way to ensure the normal operation of the computer hardware. It can be said that the power supply is the heart of the computer. A female accessory in the computer has a certain power consumption. * A DC power that requires different voltages. The main function of the power supply is to convert the external AC (AC) into a DC power (DC) that meets the needs of the computer. The function is similar to that of a small appliance. To connect to the AC adapter of the mains. The difference is that PC (Personal Computer) power requirements have a relatively fixed standard, unlike adapters that are only suitable for specific appliances, and the power supply workflow is relatively complicated, so the power supply directly affects the computer's ability. Whether it is normal operation, it is necessary to test the working parameters such as voltage and current of the power supply in the process of research and development, production and testing of the computer. The development of computer power supply has two main types of ATX power supply and BTX power supply. 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 is supplied to the motherboard, and +5 V_SB (Standby) voltage is used as the startup voltage. In addition, there is a PS_ON (Power Supply-ON) signal pin for receiving a potential signal and a PWR-GOOD (Power Good) signal pin. From the 'ATX power supply specification, when the power supply is in normal working condition, 7. The motherboard provides the potential signal to make the power supply p-ray, and the signal pin is low, and all the voltages of the power supply are normal. PWR ΓΌΠΓ4 -> τι 'At the same time output the PWR_G〇OD signal of the south potential to the motherboard, ς\/ cvc 〇. For the PWR GOOD signal than 5V SYS, 3.3V_SYS, +12V eMule - Yipin /·仗 secretion For + u, the delay is delayed by 100-500ms in the timing. In the standby state, the motherboard provides the 21_ _ bit signal so that the PS_ON signal pin of the power supply is 鬲 potential. At this time, the power supply 0 and 軚 supply +5V SB voltage. The remaining 5V-SYS, 3.3V SYS, +12V, etc. +A - - f% fort stop output, and the output PWR-GOOD signal needs to be turned to low immediately. After the development of the motherboard is completed, the user may use a variety of different ATX power supplies. Due to the discreteness of the products of different power supply manufacturers, the motherboard may not work when it is matched with a certain power supply. That is, the motherboard is incompatible with the power supply, and the reason for this is that the timing of the PWR-GOOD signal from the ATX power supply is incorrect or the voltage is unstable, which cannot be satisfied; another reason is from the ATX power supply. The PWR_GOOD signal is a 5V TTL (Transistor-Transistor $ Logic) potential. This potential is usually used as the startup voltage of the chip on the motherboard. Some chips have a startup voltage of 3.3V, so the PWR_GOOD signal is sent from the power supply. The 3.3V chip on the motherboard cannot be started, causing the motherboard not to boot. SUMMARY OF THE INVENTION In view of the above, it is necessary to provide a motherboard power supply adaptation circuit to simultaneously provide two power supply normal signals for the motherboard to activate the chip on the motherboard, thereby improving the compatibility of the motherboard with the power supply. And to ensure that the voltage and timing of the power supply normal signal meet the needs. 13-58634 A kind of motherboard power supply adaptation circuit, including a power connection crying, a signal pin, a power supply to start the electric signal; a normal second chat = a voltage pin; - an electronic switch, including Second and second: As soon as the younger brother knows, the first end is connected to the power source, and the second end is connected to the power source to cry. The ^t boot signal pin is connected to the ground, a diode, and the cathode is The brother is connected by a pin, and the anode is connected through a first-resistor: the power supply is normally connected to the ground and is grounded through a first capacitor: and: the input: the anode of the first voltage is connected to obtain another starting voltage signal.一 The one-pole body board power supply matching circuit, the number control the other-starting power signal generated by the power supply normal signal provides two voltage power supply normal signals to start::: when the motherboard board power supply Compatibility. Wafer, improvement [Embodiment] 'Kao® 1' is preferred for the power supply matching circuit of the motherboard of the present invention. 匕 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Sex, two resistors, two electric valleys C4C2 and - wheel (four) robbers - ATX24PIN connector for connection -= source connection includes a power supply signal pin PS 〇N, - power supply, its package continues - GOOD, - 3.3V voltage pin and a 5v voltage = pin switch Q includes the first, the first and the flute a sister electrical reverse pin. The electron .R ^ and in the preferred embodiment, the 哕 4 4 Q Q is an N-channel field effect transistor, and the first δ " electricity is a gate, a drain and a source, respectively. The first end of the electronic switch Q of the first and third ends is connected with the power supply of the power connector 9 9 1358634 signal pin PS-〇N, and the power supply of the second end and the power connector H is: The foot PWR-GOOD is connected, and the third end is grounded. The cathode of the diode D is connected to the power supply normal signal pin p\VR-GOOD of the power connector ' 'the anode of the diode D passes through the resistor ri and the 3.3V voltage pin of the power connector η Connect and ground through the capacitor C1, the round end? (} is connected to the anode of the diode D to obtain a startup voltage signal, and is output to the motherboard. The power supply connector of the power connector 正常PWR_G00D is also connected to the 5V voltage pin through the resistor R2. The grounding of the capacitor C2 is grounded. In the ATX power supply specification, the rising delay of the signal generated by the power supply normal signal pin PWR_GOOD is less than i〇ms', so the delay time of the rc circuit composed of the resistor R1 and the capacitor C1 is less than 10 ms, so that the delay time is less than 10 ms. The start voltage signal outputted by the output PG meets the ATX power supply specification. Because the logic high potential range is 2.4V~5V, the voltage signal generated by the power supply normal signal pin PWR_GOOD is still high when it is 2.4V~3.3V. 'The diode D will still be turned on, causing the output voltage of the output terminal PG to fail to meet the needs of the motherboard. Therefore, the resistor r2, the capacitor C2 and the 5V voltage pin are used to pull up the power signal bow. The 5V TTL voltage signal generated by the PWR_GOOD pin ensures that the diode D will not conduct when the power is high. When the motherboard is turned on, the power connector of the power connector is turned on. PS-ON For the low potential 'the electronic switch Q is cut off, at this time, the output voltage of the power supply normal signal pin PWR_GOOD of the power connector η is also low, the diode D is turned on, and the starting voltage signal outputted by the output terminal PG is also Low potential. After 100-500ms delay (ATX power supply specification), the power supply normal signal 1356386 pin PWR_GOOD output 5V TTL potential, at this time the diode D is cut off, the 3.3V voltage through the resistor R1 to charge the capacitor C1, when After the charging of the capacitor C1 is completed, the starting voltage signal outputted by the output terminal PG is 3.3V, and the ATX power supply specification is met in timing. When the motherboard is turned off or in standby state, the power supply connector signal pin PS_ON of the power connector When the voltage is high, the electronic switch Q is turned on, and the diode D is also turned on, and the starting voltage signal outputted by the output terminal PG is immediately pulled to a low potential, and the response time of the electronic switch Q and the diode D is due to Very short, so the voltage jump time meets the ATX specification. The above motherboard power supply adaptation circuit can be powered by the power supply signal pin PWR_GOOD after the motherboard is powered on. The conventional 5V TTL voltage signal is used as the starting voltage signal of the motherboard chip, and a 3.3V voltage signal is provided as the starting voltage signal of the motherboard chip through the output terminal PG, thereby satisfying the starting voltage requirements of different types of chips on the motherboard. And meet the ATX power supply specification in timing. The power connector is not limited to the ATX 24 PIN connector, other types of power connectors, such as the ATX 20 ΡΙΝ connector. The electronic switch Q can also be used for ΝΡΝ transistors or other types of electronics. switch. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of an electric 11 1358634 of a preferred embodiment of a power supply adapter circuit for a motherboard of the present invention. [Main component symbol description]
電源連接器 Η 電子開關 Q 二極體 D 電阻 Rl、R2 電容 Cl、C2 輸出端 PG 12Power connector Η Electronic switch Q Diode D Resistor Rl, R2 Capacitor Cl, C2 Output PG 12