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STLC3075 数据表(PDF) 12 Page - STMicroelectronics |
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STLC3075 数据表(HTML) 12 Page - STMicroelectronics |
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12 / 26 page  STLC3075 12/26 Name Function Formula Typ. Value RP Line protection resistor Rp > 30 Ω 50 Ω 1% RLIM Current limiting programming RLIM = 1300/Ilim 32.5k Ω < RLIM < 65kΩ 52.3k Ω 1% @ Ilim = 25mA RTH Off-hook threshold programming (ACTIVE mode) RTH = 290/ITH 27k Ω < RTH < 52kΩ 32.4k Ω 1% @ITH = 9mA CREV Reverse polarity transition time programming CREV = ((1/3750) · ∆T/∆VTR) 22nF 10% 10V @ 12V/ms RDD Pull up resistors 100k Ω CVCC Internally supply filter capacitor 100nF 20% 10V CVpos Positive supply filter capacitor with low impedance for switch mode power supply 100 µF(4) CV Battery supply filter capacitor with low impedance for switch mode power supply 100 µF 20% 100V (5) CVB High frequency noise filter 470nF 20% 100V CRD (6) High frequency noise filter 100nF 10% 15V CZ Fly-Back compensation capacitor 2.2nF, 20% CSF Sense Filter capacitor 120pF, 20% RSF Sense Filter resistor 1k Ω RSENSE DC/DC converter peak current limiting RSENSE = 375mV/IPK 110m Ω @IPK = 3.3A Q1 DC/DC converter switch Nchan MOS transistor RDS(ON) ≤0.05Ω,VDSS = 30V VDG=30V, ID = 6.5A Low threshold drive STN4NF03L or equivalent D1 DC/DC converter series diode Vr > 350V, tRR ≤ 80ns SMBYTW01-400 or equivalent T1 DC/DC Converter transformer Fly-Back transformer 4W, Turns Ratio 1:16 fro VPOS range from 4.5V to 8.5V Tyco COEV MAGNETICS MGPWG-00007 T1 DC/DC Converter transformer Fly-Back transformer 4W, Turns Ratio 1:8 fro VPOS range from 8.5V to 12V Tyco COEV MAGNETICS MGPWG-00008 RF1 Negative battery programming level 250K Ω<RF1<300KΩ (7) 300k Ω 1% @ VBATR = -70V RF2 Negative battery programming level 9.1k Ω 1% Table 12. External Components @Gain Set = 0 Name Function Formula Typ. Value RS Protection resistance image RS = 50 ⋅ (2Rp) 5k Ω @ Rp = 50Ω ZAC Two wire AC impedance ZAC = 50 ⋅ (Zs - 2Rp) 25k Ω 1% @ Zs = 600Ω ZA (1) SLIC impedance balancing network ZA = 50 ⋅ Zs 30k Ω 1% @ Zs = 600Ω ZB (1) Line impedance balancing network ZB = 50 ⋅ Zl 30k Ω 1% @ Zl = 600Ω CCOMP AC feedback loop compensation fo = 250kHz CCOMP = 1/(2 π⋅fo⋅100⋅(RP)) 120pF 10% 10V @ Rp = 50 Ω CH Trans-Hybrid Loss frequency compensation CH = CCOMP 120pF 10% 10V RTTX (3) Pulse metering cancellation resistor RTTX = 50Re (Zlttx+2Rp) 15k Ω @Zlttx = 200Ω real Table 11. External Components for Fly-back configuration (continued) |
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