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LTC4060EDHC Datasheet(PDF) 4 Page - Linear Integrated Systems |
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LTC4060EDHC Datasheet(HTML) 4 Page - Linear Integrated Systems |
4 / 20 page 4 LTC4060 4060f SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS The ● indicates specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, VBAT = 2.8V, GND = 0V unless otherwise specified. All currents into the device pins are positive and all currents out of the device pins are negative. All voltages are referenced to GND unless otherwise specified. ELECTRICAL CHARACTERISTICS VHTIH NTC Pin Hot Charge Initiation Hysteresis Voltage VNTC Increasing 100 mV VHTC NTC Pin Hot Charge Cutoff Threshold Voltage VNTC Decreasing, 4.5V ≤ VCC ≤ 10V ● 0.37 • 0.4 • 0.43 • V VCC VCC VCC VHTCH NTC Pin Hot Charge Cutoff Hysteresis Voltage VNTC Increasing 100 mV VNDIS NTC Pin Disable Threshold Voltage 25 250 mV INL NTC Pin Pull-Down Current VNTC = 2.5V ● 0.15 1.5 µA tACC Timer Accuracy RPROG = 698Ω, CTIMER = 1.2nF and –15 0 15 % RPROG = 3480Ω, CTIMER = 470pF Output Drivers IDRV Drive Pin Sink Current VDRIVE = 4V ● 40 70 120 mA RDRV Drive Pin Resistance to VCC VDRIVE = 4V, Not Charging 4700 Ω VOL ACP, CHRG Output Pins Low Voltage IACP = ICHRG = 10mA 0.8 V IOH ACP, CHRG Output Pins High Leakage Current Outputs Inactive, VCHRG = VACP = VCC –2 2 µA Control Inputs VIT SHDN, SEL0, SEL1, CHEM, PAUSE Pins Digital VCC = 10V 350 650 mV Input Threshold Voltage VITH SHDN, SEL0, SEL1, CHEM, PAUSE Pins Digital 50 mV Input Hysteresis Voltage IIPD SHDN, SEL0, SEL1, CHEM Pins Digital Input VCC = 10V, VIN = VCC 0.4 2 µA Pull-Down Current IIPU PAUSE Pin Digital Input Pull-Up Current VIN = GND –2 –0.4 µA Note 1: Absolute Maximum Ratings only indicate limits for survivability. Operating the device beyond these limits may result in permanent damage. Continuous or extended application of these maximum levels may adversely affect device reliability. Note 2: The LTC4060 is guaranteed to meet performance specifications from 0°C to 70°C ambient temperature range and 0°C to 85°C junction temperature range. Specifications over the –40°C to 85°C operating ambient temperature range are assured by design, characterization and correlation with statistical process controls. Note 3: This IC includes overtemperature protection that is intended to protect the device during momentary overload conditions. Overtempera- ture protection is activated at a temperature of approximately 145°C, which is above the specified maximum operating junction temperature. Continuous operation above the specified maximum operation temperature may result in device degradation or failure. Operating junction temperature TJ (in °C) is calculated from the ambient temperature TA and the average power dissipation PD (in watts) by the formula: TJ = TA + θJA • PD Note 4: Short duration drops below the minimum VCC specification of several microseconds or less are ignored by the undervoltage detection circuit. Note 5: Assumes that the external PNP pass transistor has negligible B-C reverse leakage current when the collector is biased at 2.8V (VBAT for two charged cells in series) and the base is biased at VCC. Note 6: Assumes that the external PNP pass transistor has negligible B-E reverse leakage current when the emitter is biased at 0V (VCC) and the base is biased at 5.6V (VBAT for four charged cells in series). Note 7: The charge current specified is the regulated current through the internal current sense resistor that flows into the external PNP pass transistor’s emitter. Actual battery charging current is slightly less and depends upon PNP alpha. Note 8: Given as a per cell voltage (VBAT/Number of Cells). Note 9: Supply current includes the current programming resistor current of 2mA. The charger is paused and not charging the battery. Note 10: The minimum VCC supply is set at 5V during this test to compensate for voltage drops due to test socket contact resistance and 2A of current. This ensures that the supply voltage delivered to the device under test does not fall below the UVLO entry threshold. Specification at the minimum VCC of 4.5V is assured by design and characterization. |
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