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STLC3065 数据表(PDF) 13 Page - STMicroelectronics |
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STLC3065 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 27 page  EXTERNAL COMPONENTS Name Function Formula Typ. Value RREF Bias setting current RREF = 1.3/Ibias Ibias = 50 µA 26k Ω 1% CSVR Negative Battery Filter CSVR = 1/(2 π ⋅ fp ⋅ 1.8MΩ) fp = 50Hz 1.5nF 10% 100VL RD Ring Trip threshold setting resistor RD = 100/IRTH 2K Ω <RD < 5KΩ 4.12k Ω 1% @ IRTH = 24mA CAC AC/DC split capacitance 22 µF 20% 15VL @ RD = 4.12k Ω RP Line protection resistor Rp > 30 Ω 41 Ω 1% RS Protection and series switches resistance image RS = 100 ⋅ (Rp + 9Ω)5kΩ @Rp = 41Ω ZAC Two wire AC impedance ZAC = 50 ⋅ (Zs - 2Rp - 18Ω) 25k Ω 1% @ Zs = 600 Ω ZA (1) SLIC impedance balancing network ZA = 50 ⋅ Zs 30k Ω 1% @ Zs = 600 Ω ZB (1) Line impedance balancing network ZB = 50 ⋅ Zl 30k Ω 1% @ Zl = 600 Ω CCOMP AC feedback loop compensation CCOMP = 1/(2 π⋅fo⋅100⋅(RP+9Ω)) fo = 250kHz 120pF 10% 10VL @Rp = 41 Ω CH Trans-Hybrid Loss frequency compensation CH = CCOMP 120pF 10% 10VL 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 = 260/ITH 27k Ω < RTH < 52kΩ 28.7k Ω 1% @ITH = 9mA CREV Reverse polarity transition time programming CREV = (1/3750) ⋅ ∆T/∆VTR) 22nF 10% 10V @ 12V/ms RTTX (3) Pulse metering cancellation resistor RTTX = 50Re[(Zlttx+2Rp+18 Ω)] 15k Ω @Zlttx = 200 Ω real CTTX (3) Pulse metering cancellation capacitor CTTX = 1/{50 ⋅2π⋅fttx[-lm(Zlttx)]} 100nF 10% 10V (2) @ Zlttx = 200 Ω real RLV Pulse metering level resistor RLV = 63.3 ⋅103⋅α⋅VLOTTX α = (|Zlttx + 2Rp + 18Ω|/|Zlttx|) 27k Ω 1% @VLOTTX = 275mVrms CS Pulse metering shaping capacitor CS = τ/(2⋅RLV) 100nF 10% 10V @ τ = 6ms, RLV = 27.1kΩ CFL Pulse metering filter capacitor CFL = 2/(2 π⋅fttx⋅RLV) 1nF 10% 10V @fttx = 12kHz RLV = 27k Ω 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% 100VL STLC3065 13/27 |
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