Datasheet LT3651-4.1, LT3651-4.2 (Analog Devices) - 3

LT3651-4.1/LT3651-4.2
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = 20V, SHDN = 2V, SENSE = BAT = VBAT(FLT), CTIMER = 0.68µF, RT = 50k, CLP = CLN = VIN, BOOST – SW = 4V. PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Operating Range l 6.5 32 V VIN OVLO Threshold VIN Rising 32 35 40 V VIN OVLO Hysteresis 1.1 V VIN UVLO Threshold VIN Rising l 4.6 4.8 V VIN UVLO Hysteresis 0.2 V Battery Float Voltage, VBAT(FLT) LT3651-4.1 4.08 4.1 4.12 V l 4.05 4.14 LT3651-4.2 4.18 4.2 4.22 V l 4.16 4.24 Battery Recharge Voltage Hysteresis Threshold Voltage Relative to VBAT(FLT) –105 mV Battery Precondition Threshold Voltage, LT3651-4.1 VBAT Rising 2.85 V VBAT(PRE) LT3651-4.2 VBAT Rising 2.9 V Battery Precondition Threshold Hysteresis Threshold Voltage Relative to VBAT(PRE) 70 mV Operating VIN Supply Current CC/CV Mode, Top Switch On, ISW = 0A 8.6 mA Standby Mode 85 µA Shutdown (SHDN = 0V) 17 µA Top Switch On Voltage VIN – VSW , ISW = 4A 480 mV Bottom Switch On Voltage VSW , ISW = 4A –140 mV BOOST Supply Current Switch High, ISW = 0A, 2.5V < (VBOOST – VSW) < 4.5V 40 mA BOOST Switch Drive IBOOST/ISW , ISW = 4A 25 mA/A Precondition Current Sense Voltage VSENSE – VBAT , VBAT = 2.5V 14 mV Input Current Limit Voltage VCLP – VCLN, ILIM Open l 70 95 115 mV CLP Input Bias Current 120 nA CLN Input Bias Current 36 µA ILIM Bias Current l 43 50 57 µA System Current Limit Programming Gain VILIM/(VCLP – VCLN), VILIM = 0.5V 11.5 V/V Maximum Charge Current Sense Voltage VSENSE – VBAT , VBAT = 3.5V, VRNG/SS > 1.1V l 88 95 103 mV C/10 Trigger Sense Voltage VSENSE – VBAT l 4.5 8.6 12.3 mV BAT Input Bias Current Charging Terminated 0.1 1 µA SENSE Input Bias Current Charging Terminated 0.1 1 µA RNG/SS Bias Current l 44 50 56 µA Charge Current Limit Programming Gain VRNG/SS/(VSENSE – VBAT), VRNG/SS = 0.5V l 8.5 10.8 12.5 V/V NTC Range Limit (High) VNTC Rising l 1.25 1.36 1.45 V NTC Range Limit (Low) VNTC Falling l 0.27 0.29 0.31 V NTC Threshold Hysteresis % of Threshold 10 % NTC Disable Impedance Minimum External Impedance to GND l 150 470 kΩ NTC Bias Current VNTC = 0.75V l 46.5 50 53.5 µA Shutdown Threshold VSHDN Rising l 1.15 1.20 1.23 V Shutdown Hysteresis 95 mV SHDN Input Bias Current –10 nA Status Low Voltage VCHRG, VFAULT , VACPR, Load = 10mA l 0.45 V 365142ff For more information www.linear.com/LT3651-4.1 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Pin Functions Block Diagram Operation Applications Information Typical Applications Revision History Typical Application Related Parts