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LTC4124 Datasheet(PDF) 3 Page - Analog Devices |
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LTC4124 Datasheet(HTML) 3 Page - Analog Devices |
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3 / 24 page  LTC4126-ADJ 3 Rev. 0 For more information www.analog.com The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Notes 2, 3). VACIN = VCC = 5V, VBAT = 3.8V, unless otherwise noted. ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS AC Rectification VCC(HIGH) VCC High Voltage Limit VCC Rising 5.25 5.5 5.75 V VCC(LOW) VCC Low Voltage Limit VCC Falling 4.75 5 5.25 V ACIN to VCC Voltage Drop 7.5mA from ACIN to VCC 0.6 V Battery Charger VCHG Battery Charge Voltage l 4.158 4.200 4.242 V ICHG Battery Charge Current RPROG = 0Ω l 47 40 50 50 53 60 mA mA RPROG = 107kΩ l 0.76 1.01 1.26 mA RPROG = 0Ω to 107kΩ, As a Percentage of Typical Value l 75 100 125 % ΔVUVLO VCC-to-VBAT Differential Undervoltage Lockout Threshold (Indicated at ACPR Pin) VCC Falling VCC Rising 9 55 27 80 45 105 mV mV ΔVUVCL VCC-to-VBAT Differential Undervoltage Current Limit Threshold Voltage IBAT = 0.9 • ICHG IBAT = 0.1 • ICHG 200 120 mV mV IDUVCL Charge Current Threshold for DUVCL Fault Indication (VCC – VBAT) Falling (VCC – VBAT) Rising 40 60 % % VRECHRG Recharge Battery Threshold Voltage As a Percentage of VCHG 96.5 97.5 98.5 % tTERMINATE Safety Timer Termination Period Timer Starts at the Beginning of the Charge Cycle, VCC > (VBAT + 100mV) 5.1 6 6.9 hours fSLOW Slow Blink Frequency 1.14 Hz fFAST Fast Blink Frequency 4.58 Hz VCOLD Cold Temperature Fault Threshold Voltage Rising Threshold Voltage 75.0 76.5 78 %VCC Hysteresis 1.5 %VCC VHOT Hot Temperature Fault Threshold Voltage Falling Threshold Voltage 33.4 34.9 36.4 %VCC Hysteresis 1.5 %VCC VDIS NTC Disable Threshold Voltage 150 250 mV INTC NTC Leakage Current VNTC = 2.5V –100 100 nA VNTC = 0V –150 nA Step-Down DC/DC Regulator VOUT DC/DC Regulator Output Voltage VBAT > VLOBAT1 or VDISCONNECT < VBAT < VLOBAT2, IOUT = 0 l 1.16 1.2 1.24 V VLOBAT2 < VBAT < VLOBAT1, IOUT = 0 VBAT/3 V VLOBAT1 Low Battery Alert 1 Threshold VBAT Falling l 3.52 3.6 3.68 V Hysteresis 100 mV VLOBAT2 Low Battery Alert 2 Threshold VBAT Falling l 3.22 3.3 3.38 V Hysteresis 100 mV VLOBAT3 Low Battery Alert 3 Threshold VBAT Falling l 3.12 3.2 3.28 V Hysteresis 100 mV VDISCONNECT Low Battery Disconnect Threshold Voltage VBAT Falling l 2.93 3 3.07 V fSW DC/DC Switching Frequency 3:1 Mode (VBAT > VLOBAT2) 2:1 Mode (VBAT < VLOBAT2) l l 40 60 50 75 60 90 kHz kHz ROL Effective Open-Loop Output Resistance (Note 4) VBAT = 3.5V, IOUT = 3mA 4.6 6.5 Ω |
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