... -12 V +15 V VR1 R3 R1 R15 R17 -12 V D4 AN D D6 d1 d9 R 11 T1 T2 Udk +15 V +12 V +12 V D2 R14 R16 R9 d7 d8 R1 D5 +12 V -12 V R18 VR3 -12 V R1 T1 R2 +12 V ~220V R 21 D1 x -12 V -12 V Z R2 +12 V R2 -12 V + +15 ... ngun UPS II- Mch phn hi ỏp: +15 V R18 R14 R15 R16 VR3 +12 V R19 R20 +12 V R17 -12 V -12 V Nguyờn lớ ging ht nh mch phn hi dũng in nhng ch khỏc l ta ly in ỏp phn hi t chit ỏp.Vy chn: R16=R17=1k,R16 ... R16=R17=1k,R16 =5k +V =18 V, R20=1k St ỏp ta chn l 2,4 (V)suy chn R14 =11 7k,R15=3k 40 ỏn TCS III Thit k b CL ca ngun UPS Mch iu khin v dng in ỏp: R8 +15 V MBA X +12 V MBA D1 C1 C2 R4 R0 Uv +12 V R1 VR 2 R2...