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LTC4020 Datasheet(PDF) 4 Page - Linear Technology |
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LTC4020 Datasheet(HTML) 4 Page - Linear Technology |
4 / 42 page LTC4020 4 4020fb For more information www.linear.com/LTC4020 SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Battery Charger VBAT Charger Output Voltage Range l 55 V VFB Float Reference Auto Recharge Voltage Precondition Threshold (Rising) Precondition Hysteresis CC/CV Charging (MODE = 0V) % of Float Reference % of Float Reference l l l 2.4875 2.475 96.5 68 2.5 97.5 70 85 2.5125 2.525 98.5 72 V V % % mV Absorption Reference Float Reference Bulk Charge Threshold (Falling) Precondition Threshold (Rising) Precondition Hysteresis Lead-Acid Charging (MODE = INTVCC) % of Absorption Reference % of Absorption Reference % of Absorption Reference l l l l 2.4875 2.475 91.5 86 68 2.5 92.5 87.5 70 85 2.5125 2.525 93.5 89 72 V V % % % mV Voltage Reference CC Charging (MODE = - NC -) l 2.4875 2.475 2.5 2.5125 2.525 V V VIN_REG Input Regulation Reference % of Float (CC/CV), Safety (CC), or Absorption (LA) Reference l 98 100 102 % VFBMIN Instant-On Reference % of Float (CC/CV) or Absorption (LA) Reference l 84 85 86 % C/10 Detection Enable (Rising) Hysteresis (Falling) 2.175 20 V mV Instant-On Charge Current Reduction Threshold VCSN – VBAT; Note 4 0.45 V C/10 Detection Enable C/10 Detection Hysteresis VCSN – VBAT Falling VCSN – VBAT Rising 1.05 150 V mV Charge Current Reduction Gain ΔVCS(MAX)/Δ(VCSN – VBAT);Note 4 –33 mV/V IBATQ Battery Bias Currents with PowerPath Switcher Disabled ICSP + ICSN + IBAT l 9 18 µA CSN, CSP Charger Current Sense Pin Operating Bias Currents ICSP = ICSN; Charging Enabled 40 µA Charger Current Sense Limit Voltage VCSP – VCSN l 47.5 50 52.5 mV Charger Current Sense Termination Voltage (C/10) VCSP – VCSN; MODE = 0V l 3 5 7 mV Charger Current Sense Precondition Voltage VCSP – VCSN; VFB = 1.5 l 1.5 3 4.5 mV Sense Input UVLO UVLO Hysteresis VCSP Rising (Charging Enabled) VCSP Falling (Charging Disabled) l 1.6 1.75 100 1.9 V mV CSOUT Offset VCSP = VCSN l 0.225 0.25 0.290 V Gain ΔVCSOUT / Δ(VCSP – VCSN) l 19 20 21 V/V RNG/SS Current Limit Programming VRNG/SS = 0.5V; VRNG/SS/VCS(MAX) l 18 20 22 V/V NTC NTC Range Limit (High) NTC Range Limit (Low) NTC Range Hysteresis VNTC Rising VNTC Falling % of VNTC(H,L) l l 1.30 0.27 1.35 0.3 20 1.40 0.33 V V % INTC NTC Pin Bias Current VNTC = 0.8V l 47.5 50 52.5 µA NTC Disable Current INTC Pin Current (Falling) 3.5 µA NTC Disable Current Hysteresis 2 µA VBGATE Gate Clamp Voltage VCSN – VBGATE l 7 9.5 12 V C/10 Detection Enable (Falling) C/10 Detection Enable Hysteresis VCSN < 7V 0.425 0.125 V V ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). PVIN = SENSVIN = CSP = CSN = BAT = 20V, SHDN = 2V, C(TG1, BG1, TG2, BG2) = 1000pF, VRNG/SS = 2V. |
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Similar Description - LTC4020_15 |
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