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STLC3085 数据表(PDF) 17 Page - STMicroelectronics |
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STLC3085 数据表(HTML) 17 Page - STMicroelectronics |
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17 / 28 page  STLC3085 Functional description 17/28 Name Function Formula Typ. Value 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% 15V @ RD = 4.12k Ω 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/∆V TR) 22nF 10% 10V @ 12V/ms RDD Pull up resistors 100k Ω CVCC Internally supply filter capacitor 100nF 20% 10V CVpos(1) Positive supply filter capacitor with low impedance for switch mode power supply 100 µF CV(2) Battery supply filter capacitor with low impedance for switch mode power supply 100 µF 20% 100V CVB High frequency noise filter 470nF 20% 100V CRD(3) High frequency noise filter 100nF 10% 15V Q1 DC/DC converter switch P ch. MOS transistor RDS(ON) ≤1.2Ω,VDS = -100V Total gate charge=20nC max. with VGS=4.5V and VDS=1V ID>500mA Possible choiches: IRF9510 or IRF9520 or IRF9120 or equivalent D1 DC/DC converter series diode Vr > 100V, tRR ≤ 50ns SMBYW01-200 or equivalent RSENSE DC/DC converter peak current limiting RSENSE = 100mV/IPK 130m Ω @IPK = 770mA RF1 Negative battery programming level 250K Ω<RF1<270KΩ 270k Ω 1% @ VBATR = -64V RF2 Negative battery programming level 9.1k Ω 1% L(4) DC/DC converter inductor DC resistance ≤ 0.1Ω L=100 µH SUMIDA CDRH125 or equivalent FLY-BACK CONFIGURATION RREF Bias setting current RREF = 1.3/Ibias; Ibias = 50 µA 26k Ω 1% Table 10. External Components (continued) |
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