笔记本主板详细电路工作原理.ppt

888M1 DC/DC Power Supply Introduction謝謝同仁們熱情參與!! Compal +3V,+3VS,+5VS,+5V etc. CKT Drawing : P.29 Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide Compal Trouble Shouting Guide 888M1 DC/DC Power Supply Introduction * Compal TOSHIBA 888M1 DC/DC Power Supply Introduction Power Team of PE Department Prepared by : Te-Yin Liu Date : 2001/7/23 Compal Let’s Going to do something now About the Course : 1. Block Diagram 2. Circuit operation theorem 3. Trouble Shouting Guide Compal 888M1 DC/DC Block Diagram Compal DC/DC Input EMI Filter CKT Drawing : P32 Top XL = 2?fL XL = 2?fL XC = 1/(2?fC) Time Lag Compal VS, RTCVREF, CHGRTC, 51ON#, +RTCVCC When Adapter INPUT only CKT Drawing : P.31 P.32 19.6V 18.5V 0.0V 0.0V 12.5V 16.0V 3.5V 12.5V 3.5V Regulator Compal VS, RTCVREF, CHGRTC, 51ON#, +RTCVCC When Battery INPUT only CKT Drawing : P.31 P.32 0.0V Vbatt-0.6-0.3V 12 ~ 16.5V Vbatt -0.6-6.2V Vbatt-0.6V 3.5V 12 ~ 16.5V Vbatt -0.6-6.2V 3.5V Regulator Compal VIN Detector --- PACIN, ACIN CKT Drawing : P.32 3.8V 3.5V 2.4~3.6V VS VIN 電壓比較器輸入/輸出關係圖 : 1.T=0時,因電壓位準高於參考位準V(L),輸出為 V(H) 2.T=T1時,由於電壓位準仍高於參考位準V(L),輸出保持為 V(H) 3.T=T2時,因電壓位準等於參考位準V(L),輸出由V(H)轉為V(L) 4.T=T3時,由於電壓位準仍低於參考位準V(H),輸出保持為 V(L) 5.T=T4時,因電壓位準等於參考位準V(H),輸出由V(L)轉為V(H) ? 以上類似舒密特觸發電路的遲滯功能即由Pin(1)-Pin(3)的 正回授達成 Compal CPU Thermal Protection CKT Drawing : P.32 2.5V 5.0V 5.0V 18.5V Compal Adapter INPUT Control SW CKT Drawing : P.34 8.9V 19.6V 19.6V OFF OFF LOW P CH P CH P CH ON ON Compal Status of PC87591VPC before Power Ready CKT Drawing : P.27 Compal +5VALWP, +3VALWP, +12VALWP CKT Drawing : P.35 + _ + _ + _ + _ _ + +