201207607 -與功率因數校正電路82 #輸出端連接，並受—控制器所 控制，其二次側則提供多組直流電源Vcc2、Vcc及MB ; 其中，VSB係提供電腦端一待機（STANDBY)電源其可為 12V或5V。而前述直流對直流轉換電路83的輸出端係供 應電腦端一主電源（Vmain)，一般為i2v。 又電腦端的電源控制架構大致如圖7所示其包括一 電源管理控制器90、數個切換開關91，92 模組93〜95;其中：各切換開關91,92分別具有== • 及一輸出端，其中一輸入端係與前述電源供應器8〇的主 電源（Vmain)連接，另一輸入端則與待機電源（VSB)連接， 各切換開關91,92的輸出端則分別與電源穩壓模組93 94 連接，其中電源穩壓模組94的輸出端又與另一電源穩壓 模組95的輸入端連接’從而由各電源穩壓模組93〜95分 別供應電源給硬碟機、通訊介面埠（USB)、記憶體及中央 處理單元（CPU)等。 再者，前述電源管理控制器90係由電源供應器8〇的 • 待機電源（VSB)所供應，又電源管理控制器9〇具有一指令 輸出端（En/Disable)，係與前述直流對直流轉換電路83的 脈寬調變控制器U1之致能端（Enable)連接。 而電源管理控制器90將執行以下的電源控制功能： 1. 電腦端的電源管理控制器90獲得待機電源（vsb) ，但控制直流對直流轉換電路83的脈寬調變控制器υ 1將 其關閉（disable)，而等待開機或喚醒（wake up)命令。 2. 當開機（power on)或收到喚醒（wake up)命令後， s玄電源管理控制器90即致能（Enable)直流對直流轉換電路 4 201207607 83的脈寬調變控制器u 1，此時電源供應器80的主電源 (Vmain)電位開始上升。 3.檢查主電源（vmajn)之電位是否穩定？ 4·根據使用者送出的不同指令（如開機、喚醒、待機 等）’電源管理控制器90即控制切換開關91，92切換，令 耗電的如中央處理單元及硬碟機等開始由主電源（Vmain) 供電，或部分由主電源（Vma丨·η)供電，其他部分由待機源 (VSB)供電。201207607 - connected to the power factor correction circuit 82 # output terminal, and controlled by the controller, the secondary side provides multiple sets of DC power supplies Vcc2, Vcc and MB; wherein, the VSB provides a computer-side standby (STANDBY) power supply It can be 12V or 5V. The output end of the DC-DC conversion circuit 83 is supplied with a main power supply (Vmain), which is generally i2v. The power control architecture of the computer is substantially as shown in FIG. 7 and includes a power management controller 90, a plurality of switchers 91, 92 modules 93-95, wherein: each of the switchers 91, 92 has an == • and an output. One end is connected to the main power supply (Vmain) of the power supply 8〇, the other input is connected to the standby power supply (VSB), and the output ends of the respective switches 91 and 92 are respectively regulated with the power supply. The module 93 94 is connected, wherein the output end of the power voltage regulator module 94 is connected to the input end of the other power voltage regulator module 95, so that the power supply voltage regulator modules 93 to 95 respectively supply power to the hard disk drive, Communication interface USB (USB), memory and central processing unit (CPU). Furthermore, the power management controller 90 is supplied by the standby power supply (VSB) of the power supply 8〇, and the power management controller 9 has an instruction output (En/Disable), which is connected to the DC-DC. The enable of the pulse width modulation controller U1 of the conversion circuit 83 is connected. The power management controller 90 will perform the following power control functions: 1. The power management controller 90 on the computer side obtains the standby power (vsb), but controls the pulse width modulation controller 直流 1 of the DC-to-DC conversion circuit 83 to turn it off. (disable) while waiting for the boot or wake up command. 2. After power on or receiving wake up command, s Xuan power management controller 90 enables (Enable) DC-to-DC conversion circuit 4 201207607 83 pulse width modulation controller u 1, At this time, the main power (Vmain) potential of the power supply 80 starts to rise. 3. Check if the potential of the main power supply (vmajn) is stable? 4. According to the different commands sent by the user (such as power on, wake up, standby, etc.), the power management controller 90 controls the switch 91, 92 to switch, so that the power consumption such as the central processing unit and the hard disk drive start from the main power supply. (Vmain) Powered, or partially powered by the main power supply (Vma丨·η), and the other part is powered by the standby source (VSB).
由上述可知，前述電源供應器8〇係提供電腦端兩組 電源，分別為主電源（Vmain)及待機電源（VSB)，該主電源 (Vmain)只在電腦開機後供應，待機電源（vsb)則持續地供 應給電腦端的電源管理控㈣9〇,即使在開機後，電源管 理控制器90的工作電源仍由待機電源(VSB)供應。但前述 電源供應器80的問題在於：其用以供應待機電源(vsb)的 辅助電源轉換電路84 —般為低功率設計，且最常採用馳 返式（_叫架構，儘管馳返式架構的成本較低， 不高（約80%)。 機後正常運作的狀態下 理控制器90,甚至包括 由於前述待機電源在電腦端開 ’依然持續供應給電腦端的電源管 風扇’因而影響了整體用電效率。 κ可知，待機電源是易於實現的省電設計，作 於成本考量採用了馳返式架構， - 作，Μ ϋ $ 系、·先端開機後正Ί 作時仍持續以較低的效率供電給特定裝置（如電 制及風扇），因而影響了整體 '、 返彳靼棋叱Β 电欢丰，如欲保留採用 返式条構所具備的低成本優點， 關於用電效率的提升 201207607 之道 即有待另闢㈣以尋求可行的解決 【發明内容】 因此本發明的主要目的在提供一種可 源供電路徑的電源供庵 、待機電 您15其可在電源供應器的主雷％带 壓大於待機電源時，切榼炷M帝、E 電源電 ^ 換待機電源的供電路徑，由用φ # 率較高的主電源供電仏系 電夕 ,藉以有效提升整體用==待機電源供電的裝置 再自動恢復待機電源的二 =俟系統端關機或待· 為達成前述目的採取的主要 應器包括有： 要技術手&係令别述電源供 一主電源供應模組，用w〜 廿袒# 用以將父流電源轉換為直流電源 ，並k供一主電源輸出端； -辅助電源供應模組，具有一待機電源輸出端； -供電路徑切換控制電路，係設於前述主電源輸出端 與待機電源輸出端之間；該 電比較手段，當主…：切換控制電路提供-…又虽主電源電壓大於待機電源時，令主電源 輸出端切入待機電源輸出端 ’、 輸出端送出； $使主電源同時經由待機電源 I述電源供應器仍分別提供—組主電源及—組待機電 :’當電源供應器對一系統端供電時，待機電源在系統端 未開機前或待機時仍正常供應’俟系統端開機或被喚醒時 ’主電源電位開始提升，此時前述供電路徑切換控制電路 將自動比較主電源與待機電源’當主電源大於待機電源時 ’主電源除供應系統端開機後正常運作的工作電源外，亦[ t 201207607 同時取代待機電源，供電給系統端中原來由待機電源供電 的裝置，在電源供應器的電源設計中，主電源係由直流對 直流轉換電路所產生，其轉換效率明顯高於產生待機電源 的驰返式架構，但產生待機電源的輔助電源供應模組採<用 驰返式架構可以有效降低成本，通常是無法輕易放棄的優 點；而本發明利用前述的供電路徑自動切換技術，令系統 端開機後，由主電源取代待機電源供電，除可保留輔助電 源供應模組的低成本優點，更已進一步解決其影響整體用 Φ 電效率的問題。 【實施方式】 關於本發明之基本架構，請參閱圖彳所示，主要係令 -電源供應器包括一主電源供應模組，〇、_辅助電源供應 模組20;該主電源供應模組10具有一主電源輸出^ (Vmain)，輔助電源供應模、组2G具有—待機電源輸出端 (VSB)，該主電源輸出端（Vmain)與待機電源輸出端（vsb) • 之間設有一供電路徑切換控制電路3〇 ;其中： 該主電源供應模組，〇包括一整流電路彳1、—功率因 數权正電路12及一直流對直流轉換電路13等；其中： 該直流對直流轉換電路13包括一變壓器丁彳、一脈寬 調變控制U1及一功率„ S2，該脈寬調變控制器⑴ 的-控制端係與功率開關S2連接，功率開關32則與變壓 器τι的一次側連接；又直流對直流轉換電路13的輸出端 即為前述主電源輪出端（Vmain)，其上進一步設有一回授 電路14,該回授電路14的輸入端係與該主電源輸出端， 7 201207607 ' main)連接，又回授電路14的輸出端則與脈寬調變控制 器U1的回授端連接；再者，該脈寬調變控制器⑴具有一 致能端（Enable); 該辅助電源供應模組20包括一變麼器丁2，變壓器丁2 的一次側係與功率因數校正電路12的輸出端連接，並受 -控制器21所控制’其二次側則提供多組直流電源vcc2 、Vcc及VSB(待機電源），該變壓器丁2二次側與待機電源 輸出端（VSB)之間設有一二_ D1。而前述輔助電源供應 • 模組20大多為一驰返式架構。 :本貫施例中，係令主電源輸出端與待機電 源輸出端（VSB)的輸出電壓相近（例如均約為12v)，且主電 源略大於待機電源（例如主電源12·2ν，待機電源u 9v)， 又輔助電源供應模組20的Vcc2大於Vcc;該等電壓大小 可分別在主電源供應模組1〇及輔助電源供應模組2〇上進 行調整。 該供電路徑切換控制電路30係用以比較主電源與待 _機電源的電壓大小，進而根據比較結果切換待機電源輸出 端（VSB)的供電路徑；又供電路徑切換控制電路3〇之一較 佳實施例係如圖2所示，其包括： -比較器31，具有一反相輸入端、一非反相輸入端' 一輸出端及一電源端；該電源端係連接辅助電源供應模組 2〇提供的直流電源Vcc，該反相輸入端係與前述主電源輪 出端（Vmain)連接，該非反相輸入端則與前述待機電源輸 出端（VSB)連接； 一開關組32，主要係由兩NMOS電晶體M1M2組成 8 201207607 ，兩電晶體M1，M2是以汲極（D)相接，其源極則分別與 刚述主電源輸出端（Vmain)、待機電源輸出端（VSB)連接， 而為走對背接法，如是接法可防止待機電源經由電晶體 M1，M2上的本體二極體逆向流向主電源輸出端（Vmajn), 進而避免辅助電源供應模組20因無法負擔主電源輸出端 (Vmain)所需能量而當機或燒毀的問題； 一第二電晶體M3，為NMOS形式，其汲極（〇)係與開 關組32上兩電晶體M1，M2的閘極（G)連接，該汲極（D)並 • 透過一電阻與輔助電源供應模組20供應的直流電源Vcc2 連接’該第二電晶體Μ 3的閘極（G)則與比較器31的輸出 端連接。 利用前述設計’當電源供應器接上AC電源後，輔助 電源供應模組20的各組電源Vcc,Vcc2，VSB電位建立，故 待機電源輸出端（VSB)開始供電；但主電源供應模組1 〇的 脈寬調變控制器U1未獲致能指令，故主電源輸出端 (Vmain)未供電’在此狀況下’前述供電路徑切換控制電 Φ 路30的比較器31為非反相輸入端電位大於反相輸入端， 該比較器31輸出端即呈高電位，第三電晶體M3因而導通 ，並使開關組32的兩電晶體M1,M2閘極（G)接地，兩電 晶體M1，M2不通，此時由待機電源輸出端（VSB)送出的電 源仍來自辅助電源供應模組20。 當主電源供應模組1 0的脈寬調變控制器U1接獲系統 端送出的致能指令時，其直流對直流轉換電路13的主電 源輸出端（Vmain)電位開始上升，當主電源輸出端（Vmain) 電位上升至大於待機電源輸出端（VSB)電位時，比較器31 9 201207607 ' 之反相輸入端電位大於非反相輸入端電位，其輸出端轉為 低電位接地，第三電晶體M3因而截止，開關組32的兩電 晶體M1，M2因閉極（G)呈高電位而導通，又主電源輸出端 (Vmain)電位大於待機電源輸出端（VSB)電位，如是狀況下 ，此時由待機電源輸出端（VSB)送出的電源係來自主電源 輸出端（Vmain)，由於主電源輸出端（Vmain)輸出的直流電 源係由直流對直流轉換電路13所產生，其效率遠高於驰 返式架構的辅助電源供應模組2 0，在此狀況下，整體用電 _ 效率得以提高。 又前述供電路徑切換控制電路30由輔助電源供應模 組20供應的兩組直流電源Vcc2 Vcc中，係令Vcc2大於It can be seen from the above that the power supply 8 provides two sets of power sources on the computer side, namely a main power supply (Vmain) and a standby power supply (VSB). The main power supply (Vmain) is only supplied after the computer is turned on, and the standby power supply (vsb) is provided. Then, the power management control (4) 9 持续 is continuously supplied to the computer, and even after the power is turned on, the power supply of the power management controller 90 is still supplied by the standby power supply (VSB). However, the aforementioned power supply 80 has a problem in that its auxiliary power conversion circuit 84 for supplying a standby power supply (VSsb) is generally designed for low power, and is most often used in a flyback type (_called architecture), despite the flyback architecture. The cost is low, not high (about 80%). The controller 90 is in a state of normal operation after the machine, and even includes the power supply fan that is continuously supplied to the computer at the computer end due to the aforementioned standby power supply, thus affecting the overall use. Electrical efficiency. κ knows that the standby power supply is an easy-to-implement power-saving design. For cost considerations, a regenerative architecture is used. - Μ ϋ 系 系 · · 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机 开机Power is supplied to specific devices (such as electric systems and fans), thus affecting the overall ', returning to the game. If you want to retain the low cost advantages of adopting the back-type strip structure, about the improvement of power efficiency 201207607 The road to be further developed (4) to seek a feasible solution [invention] Therefore, the main purpose of the present invention is to provide a power supply path for the power supply, standby power, you can supply it at the power supply When the main lightning pressure of the main unit is greater than the standby power supply, the power supply path of the standby power supply is switched, and the power supply path is replaced by the main power supply with a higher φ# rate, thereby effectively improving the overall use. == Standby power supply device automatically restores the standby power supply. Secondly, the system side is shut down or waiting. The main devices used to achieve the above objectives include: The technical hand & the power supply for a main power supply mode Group, use w~ 廿袒# to convert the parent flow power to DC power, and k for a main power output; - Auxiliary power supply module, with a standby power output; - Power path switching control circuit, It is disposed between the foregoing main power output end and the standby power output end; the electrical comparison means, when the main...: switching control circuit provides -... and the main power supply voltage is greater than the standby power supply, the main power output end is cut into the standby power output end ', the output is sent out; $ makes the main power supply through the standby power supply I still provide the power supply - group main power and - group standby power: 'When the power supply supplies power to a system, The standby power supply is normally supplied before the system is powered on or during standby. When the system is powered on or is woken up, the main power supply starts to rise. At this time, the power supply path switching control circuit will automatically compare the main power supply and the standby power supply. When the power supply is larger than the standby power supply, the main power supply is not only the standby power supply but also the standby power supply. The power supply to the system is powered by the standby power supply. The main power source is generated by the DC-to-DC converter circuit, and its conversion efficiency is significantly higher than that of the standby power supply. However, the auxiliary power supply module that generates the standby power supply adopts the "return-back architecture" to effectively reduce the cost. The invention is generally not easy to give up; and the invention utilizes the aforementioned automatic switching technology of the power supply path, so that after the system is powered on, the main power supply replaces the standby power supply, in addition to retaining the low cost advantage of the auxiliary power supply module, Further solve the problem of affecting the overall Φ electrical efficiency. [Embodiment] Regarding the basic architecture of the present invention, as shown in the figure, the main system-power supply includes a main power supply module, _, _ auxiliary power supply module 20; the main power supply module 10 There is a main power output ^ (Vmain), the auxiliary power supply mode, the group 2G has a standby power output (VSB), and a power supply path is provided between the main power output (Vmain) and the standby power output (vsb). The switching control circuit 3〇; wherein: the main power supply module 〇 includes a rectifying circuit 彳1, a power factor right positive circuit 12, a DC-to-DC converting circuit 13, and the like; wherein: the DC-DC converting circuit 13 includes a transformer 彳, a pulse width modulation control U1 and a power „S2, the control terminal of the pulse width modulation controller (1) is connected to the power switch S2, and the power switch 32 is connected to the primary side of the transformer τι; The output end of the DC-DC conversion circuit 13 is the aforementioned main power supply terminal (Vmain), and further provided with a feedback circuit 14, the input end of the feedback circuit 14 is connected to the main power output terminal, 7 201207607 ' m Ain) connection, and the output of the feedback circuit 14 is connected to the feedback end of the pulse width modulation controller U1; further, the pulse width modulation controller (1) has a uniform energy end (Enable); the auxiliary power supply The module 20 includes a transformer 2, the primary side of the transformer 2 is connected to the output of the power factor correction circuit 12, and is controlled by the controller 21, and the secondary side provides multiple sets of DC power vcc2, Vcc and VSB (standby power supply), there is a _D1 between the secondary side of the transformer and the standby power output (VSB), and the auxiliary power supply and module 20 is mostly a reciprocating structure. In this embodiment, the output voltage of the main power output is similar to the output voltage of the standby power output (VSB) (for example, both are about 12v), and the main power supply is slightly larger than the standby power supply (for example, the main power supply 12·2ν, the standby power supply u 9v), the Vcc2 of the auxiliary power supply module 20 is greater than Vcc; the voltages can be adjusted on the main power supply module 1A and the auxiliary power supply module 2A. The power supply path switching control circuit 30 is used. To compare the voltage of the main power supply and the standby power supply And switching the power supply path of the standby power output (VSB) according to the comparison result; and a preferred embodiment of the power supply path switching control circuit 3 is as shown in FIG. 2, which includes: - a comparator 31 having an inversion The input end, a non-inverting input end, an output end and a power supply end; the power supply end is connected to the DC power supply Vcc provided by the auxiliary power supply module 2, and the inverting input end is connected to the main power supply wheel end ( Vmain) connection, the non-inverting input terminal is connected with the standby power supply output end (VSB); a switch group 32 is mainly composed of two NMOS transistors M1M2 8 201207607, two transistors M1, M2 are bungee poles (D ), the source is connected to the main power output (Vmain) and the standby power output (VSB), respectively, and the walk-to-back connection method prevents the standby power from passing through the transistor M1, M2. The upper body diode flows backward to the main power output terminal (Vmajn), thereby preventing the auxiliary power supply module 20 from being crashed or burned due to the inability to bear the energy required by the main power output terminal (Vmain); a second transistor M3, in the form of NMOS, The drain (〇) is connected to the gate (G) of the two transistors M1, M2 on the switch block 32, and the drain (D) is connected to the DC power supply Vcc2 supplied from the auxiliary power supply module 20 through a resistor. The gate (G) of the second transistor Μ 3 is connected to the output of the comparator 31. Using the aforementioned design 'When the power supply is connected to the AC power supply, the sets of power supplies Vcc, Vcc2, and VSB of the auxiliary power supply module 20 are established, so the standby power output (VSB) starts to supply power; but the main power supply module 1 The pulse width modulation controller U1 of the 〇 is not enabled, so the main power output (Vmain) is not powered. 'In this case, the comparator 31 of the power supply path switching control Φ 30 is the non-inverting input potential. The output of the comparator 31 is higher than the inverting input terminal, and the third transistor M3 is turned on, and the two transistors M1 and M2 of the switch group 32 are grounded, and the two transistors M1 and M2 are connected. No, the power sent by the standby power output (VSB) is still from the auxiliary power supply module 20. When the pulse width modulation controller U1 of the main power supply module 10 receives the enable command sent from the system, the potential of the main power output terminal (Vmain) of the DC-to-DC conversion circuit 13 starts to rise, when the main power output When the potential of the terminal (Vmain) rises to be greater than the standby power supply output (VSB) potential, the potential of the inverting input terminal of the comparator 31 9 201207607 ' is greater than the potential of the non-inverting input terminal, and the output terminal is turned to the low potential ground, the third power The crystal M3 is thus turned off, and the two transistors M1 and M2 of the switch group 32 are turned on due to the high potential of the closed end (G), and the potential of the main power output terminal (Vmain) is greater than the potential of the standby power supply output (VSB). At this time, the power supply from the standby power output (VSB) is from the main power output (Vmain), and the DC power output from the main power output (Vmain) is generated by the DC-DC conversion circuit 13, which is highly efficient. In the case of the auxiliary power supply module 20 of the back-to-back architecture, the overall power consumption efficiency is improved. Further, in the foregoing two sets of DC power sources Vcc2 Vcc supplied from the auxiliary power supply module 20, the power supply path switching control circuit 30 is such that Vcc2 is larger than
Vcc’其效果是由vcc2提供兩電晶體M1,M2較高的VGS 電壓，以相對降低兩電晶體M1，M2的導通電阻（Rds(。。)）， 而具有進一步提高用電效率的功效。再者，待機電源輸出 端（VSB)與變壓器T2二次側之間的二極體D1將產生逆向 隔離的作用’避免主電源（Vmajn)流向變壓器T2二次側， ί 干擾了辅助電源供應模組20的回授穩壓控制及造成辅助 電源供應模組20供應的各組直流電源vccp，Vcc2，Vcc的 不正確（因各組直流電源Vccp，Vcc2，Vcc亦供應其他電路 使用）。 當系統端進入待機模式或關機時，因主電源供應模組 1〇的脈寬調變控制器U1被關閉（Disable)，其主電源輸出 端（Vmain)無電位，故供電路徑切換控制電路3〇的比較器 31輸出高電位使第三電晶體m3導通，並使開關組32的 兩電晶體M1,M2閘極（G)接地而不通，此時由待機電源輸 Γ 201207607 組20供應 出端(VSB)送出的電源即恢復由辅助電源供應模 的又—較佳實施例 又前述供電路徑切換控制電路3〇 係如圖3所示，其包括： 一非反相輸入端、The effect of Vcc' is that Vcc2 provides a higher VGS voltage of the two transistors M1, M2 to relatively lower the on-resistance (Rds()) of the two transistors M1, M2, and has the effect of further improving the power efficiency. Furthermore, the diode D1 between the standby power output (VSB) and the secondary side of the transformer T2 will have the effect of reverse isolation 'avoiding the main power supply (Vmajn) flowing to the secondary side of the transformer T2, ί disturbing the auxiliary power supply mode The feedback control of the group 20 and the DC power supplies vccp, Vcc2, and Vcc of the auxiliary power supply module 20 are incorrect (because the DC power supplies Vccp, Vcc2, and Vcc are also supplied to other circuits). When the system terminal enters the standby mode or is turned off, the pulse width modulation controller U1 of the main power supply module 1 is turned off, and the main power output terminal (Vmain) has no potential, so the power supply path switching control circuit 3 The comparator 31 of the 输出 outputs a high potential to turn on the third transistor m3, and the two transistors M1, M2 of the switch block 32 are grounded and not connected. At this time, the standby power supply is output. 201207607 Group 20 supply end (VSB) The power supply sent back is restored by the auxiliary power supply mode. The preferred embodiment and the power supply path switching control circuit 3 are as shown in FIG. 3, which includes: a non-inverting input terminal,
• (Vmain)連接，該反相輸入端則與前述待機電源輸出端 (VSB)連接； 一比較器31，具有一反相輸入端、 一輸出埔 20提供！ 拉高至 一開關組32，主要係由兩NMOS電晶體M1，M2組成 ，兩電晶體M1，M2仍以汲極（D)相接，其源極（s)則分別與 前述主電源輸出端（Vmain)、待機電源輸出端（VSB)連接， 又兩電晶體M1，M2的閘極（G)共同連接至前述比較器31 的輸出端。 剛述實施例相較前一實施例，減少一顆第三電晶體 • M3’其工作方式詳如以下所述： 當主電源供應模組1 〇的脈寬調變控制器U 1未獲致能 心令’該主電源輸出端（Vmain)未供電，供電路徑切換控 制電路30的比較器31為反相輸入端電位大於非反相輸入 端’該比較器31輸出端呈低電位，進而使開關組32的兩 電晶體M1，M2閘極（G)接地，兩電晶體M1，M2不通，此時 由待機電源輸出端（VSB)送出的電源仍來自辅助電源供應 模組20。 當主電源供應模組1 〇的脈寬調變控制器U1接獲系統 11 201207607 端送出的致能指令時’其直流對直流轉換電路13的主電 源輸出端（Vmain)電位開始上升，當主電源輪出端（Vmajn) 電位上升至大於待機電源輸出端（VSB)電位時，比較器31 之非反相輸入端電位大於反相輸入端電位，其輸出端轉為 高電位，開關組32的兩電晶體M1，M2因而閘極（G)呈高 電位而導通，如是狀況下，此時由待機電源輸出端（vsb) 送出的電源即切換由主電源輸出端（Vmain)供應。 當系統端進入待機模式或關機時，因主電源供應模組 的脈寬調變控制器U1被關閉（Disab丨e)，其主電源輸出 端（Vmain)無電位，故供電路徑切換控制電路3〇的比較器 31輸出低電位使開關組32的兩電晶體M1M2閘極⑷）接 地而不通，此時由待機電源輸出端（VSB)送出的電源即恢 復由輔助電源供應模組20供應。 在前述實施例中，係令主電源輸出端（Vmajn)電位略 大於待機電源輸出端（VSB)，因而在主電源輸出端以咖叫 上的電位建立後，經由供電路徑切換控制電路3〇的切換 控制得以將主電源輸出端（Vmain)切入待機電源輸出端 (VSB)，並取而代之。在前述技術概念下，如圖*所揭示 供電路徑切換控制電路3〇的另一實施例，在理論上亦屬 可行，供電路徑切換控制電路3〇係由一順向連接於主電 源輸出端（Vmain)與待機電源輸出端（VSB)之間的二極體所 構成，一旦主電源輸出端（Vmajn)的電位建立且大於待機 電源輸出端（VSB)的電位時，主電源輸出端（ν_η)送出的 原P、’’!由—極體送至待機電源輸出端（VsB)上，但如是 作法之效率偏低。 12 201207607 再者，前述各實施例均應用在主電源電位與待機電源 電位相近的場合(例如大致為12v丨下)；若系統端對於主 電源與待機電源的電位要求不同（例如主電源12v，待機電 源5V)時，則可如圖5所示，在待機電源輸出端（VsB)上進 步連接一降壓轉換單元（Buck c〇nverter)22，且供電路 徑切換控制電路30的輸出端係與降壓轉換單元22的輸入 端連,。在此狀況下，無論待機電源輸出端（VSB)輸出的 電源疋來自主電源供應模組彳〇或輔助電源供應模組， •均將經由該降壓轉換單元22轉換為較低的電壓後再供應 給系統端。 “ 【圖式簡單說明】 圖1 圖2 例線路圖 係本發明一較佳實施例之電路圖。 係本發明供電路徑切換控制電路之第—較佳實施• (Vmain) connection, the inverting input is connected to the aforementioned standby power output (VSB); a comparator 31 has an inverting input and an output Po 20 is provided! Pulling up to a switch group 32, mainly consisting of two NMOS transistors M1, M2, two transistors M1, M2 are still connected with a drain (D), and their source (s) is respectively connected with the aforementioned main power output (Vmain), the standby power output (VSB) is connected, and the gates (G) of the two transistors M1 and M2 are connected in common to the output of the comparator 31. As described in the previous embodiment, the reduction of a third transistor M3' is performed as follows: When the main power supply module 1 〇 pulse width modulation controller U 1 is not enabled The command "the main power output terminal (Vmain) is not powered, the comparator 31 of the power supply path switching control circuit 30 is the inverting input terminal potential is greater than the non-inverting input terminal'. The output of the comparator 31 is low, thereby making the switch The two transistors M1 and M2 of the group 32 are grounded, and the two transistors M1 and M2 are not connected. At this time, the power supplied from the standby power output terminal (VSB) is still from the auxiliary power supply module 20. When the pulse width modulation controller U1 of the main power supply module 1 接 receives the enable command sent by the system 11 201207607, the potential of the main power output terminal (Vmain) of the DC-to-DC conversion circuit 13 starts to rise, when the main When the potential of the power supply terminal (Vmajn) rises to be greater than the standby power supply output (VSB) potential, the potential of the non-inverting input terminal of the comparator 31 is greater than the potential of the inverting input terminal, and the output terminal thereof is turned to a high potential, and the output of the switch group 32 The two transistors M1, M2 are thus turned on at the high potential of the gate (G). If the condition is reached, the power supply sent from the standby power output (vsb) is switched by the main power output (Vmain). When the system terminal enters the standby mode or is turned off, the pulse width modulation controller U1 of the main power supply module is turned off (Disab丨e), and the main power output terminal (Vmain) has no potential, so the power supply path switching control circuit 3 The comparator 31 of the 输出 outputs a low potential to ground the two transistors M1M2 of the switch group 32 to the ground (4), and the power supplied from the standby power output (VSB) is restored by the auxiliary power supply module 20. In the foregoing embodiment, the main power output terminal (Vmajn) potential is slightly larger than the standby power supply output terminal (VSB), and thus the power supply path is switched by the power supply path after the potential of the main power supply terminal is established. The switching control switches the main power output (Vmain) to the standby power output (VSB) and replaces it. Under the foregoing technical concept, another embodiment of the power supply path switching control circuit 3A disclosed in FIG. * is also theoretically feasible, and the power supply path switching control circuit 3 is connected to the main power output terminal by a forward direction ( Vmain) is formed by a diode between the standby power output (VSB) and the main power output (ν_η) once the potential of the main power output (Vmajn) is established and greater than the standby power output (VSB). The original P, ''! sent by the polar body to the standby power output (VsB), but the efficiency is low. 12 201207607 Furthermore, the foregoing embodiments are applied when the main power supply potential is close to the standby power supply potential (for example, approximately 12 丨); if the system side has different potential requirements for the main power supply and the standby power supply (for example, the main power supply 12v, When the standby power supply is 5V), as shown in FIG. 5, a buck converter unit 22 is connected to the standby power output terminal (VsB), and the output end of the power path switching control circuit 30 is connected. The input terminal of the buck conversion unit 22 is connected. In this case, regardless of whether the power supply output from the standby power output (VSB) is from the main power supply module or the auxiliary power supply module, both will be converted to a lower voltage via the buck conversion unit 22. Supply to the system side. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a preferred embodiment of the present invention. It is a preferred embodiment of the power supply path switching control circuit of the present invention.
圖3 例線路圖 係本發明供電路徑切換控制電路之第二較佳實施 圖4係本發明供電路徑切換控制電路之第三較 例線路圖》 圖5 圖6 圖7 路圓。 係本發明又一較佳實施例之電路圖。 係既有電源供應器的主電路圖。 係既有電源供應、器中所設辅助電源供應模組的電 【主要元件符號說明】 13 201207607 1 0主電源供應模組 1 1整流電路 1 2功率因數校正電路13直流對直流轉換電路 1 4回授電路 20輔助電源供應模組 21控制器 22降壓轉換單元 30供電路徑切換控制電路 31比較器 32開關組 80電源供應器 81整流電路 82功率因數校正電路83直流對直流轉換電路 84輔助電源轉換電路85回授電路 90電源管理控制器 91,92切換開關 93〜95電源穩壓模組Fig. 3 is a circuit diagram showing a second preferred embodiment of the power supply path switching control circuit of the present invention. Fig. 4 is a circuit diagram of a third comparative example of the power supply path switching control circuit of the present invention. Fig. 5 Fig. 6 Fig. 7 A circuit diagram of still another preferred embodiment of the present invention. It is the main circuit diagram of the existing power supply. It is the power supply and the auxiliary power supply module provided in the device. [Main component symbol description] 13 201207607 1 0 Main power supply module 1 1 Rectifier circuit 1 2 Power factor correction circuit 13 DC to DC conversion circuit 1 4 Feedback circuit 20 auxiliary power supply module 21 controller 22 buck conversion unit 30 power supply path switching control circuit 31 comparator 32 switch group 80 power supply 81 rectification circuit 82 power factor correction circuit 83 DC to DC conversion circuit 84 auxiliary power supply Conversion circuit 85 feedback circuit 90 power management controller 91, 92 switch switch 93~95 power supply voltage regulator module
14 201207607 ULA利說明書 (本說明書格式、順序〆請勿任意更動，※記 ※申請案號：饩々清勿填寫） ※申》月曰..喊※^(:分類：命4 //以（200_ 一、 發明名稱：（中文/英文） 可自動切換待機電源供電路徑的電源供應器 二、 中文發明摘要： °14 201207607 ULA manual (this format, order, please do not change, ※Note ※Application number: 饩々清Do not fill in) ※申》月曰..叫※^(:Category:Life 4 //To ( 200_ I. Name of the invention: (Chinese / English) Power supply that can automatically switch the standby power supply path. II. Abstract of the Chinese invention: °
本發明係關於-種可自動切換待機電源供電路徑的電 源供應器’主要係於一主電源供應模組的主電源輸出端及 一輔助電源供應模組的待機電源輸出端之間設有一供電路 位切換控制電路，該供電路徑切換控制電路可在主電源電 壓大於待機電源時，切換待機電源的供電路徑，由用電效 率較高的主電源供電給系統端中原由待機電源供電的裝置 ’當系統端關機或待機時’自動恢復待機電源的供電功能 ’藉以有效提升整體用電效率。 三、英文發明摘要：The invention relates to a power supply device capable of automatically switching a standby power supply path, which is mainly provided with a supply circuit between a main power output end of a main power supply module and a standby power output end of an auxiliary power supply module. a bit switching control circuit, wherein the power supply path switching control circuit can switch the power supply path of the standby power source when the main power source voltage is greater than the standby power source, and supply the power source with the higher power efficiency to the device that is originally powered by the standby power source in the system side. When the system is powered off or in standby, 'automatically restore the power supply function of the standby power supply' to effectively improve the overall power efficiency. Third, the English invention summary: