Datasheet LT3651-8.2, LT3651-8.4 (Analog Devices) - 3

LT3651-8.2/LT3651-8.4
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 9.0 32 V VIN OVLO Threshold VIN Rising 32 35 40 V VIN OVLO Hysteresis 1.1 V VIN UVLO Threshold VIN Rising l 8.7 9.0 V VIN UVLO Hysteresis 0.2 V Battery Float Voltage, VBAT(FLT) LT3651-8.2 8.16 8.2 8.24 V l 8.12 8.28 V LT3651-8.4 8.36 8.4 8.44 V l 8.32 8.48 V Battery Recharge Voltage Hysteresis Threshold Voltage Relative to VBAT(FLT) –200 mV Battery Precondition Threshold Voltage, VBAT(PRE) LT3651-8.2, VBAT Rising 5.65 V LT3651-8.4, VBAT Rising 5.80 V Battery Precondition Threshold Hysteresis Threshold Voltage Relative to VBAT(PRE) 90 mV Operating VIN Supply Current CC/CV Mode, Top Switch On, ISW = 0 8.6 mA Standby Mode 80 µA Shutdown (SHDN = 0) 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 = 0, 2.5V < (VBOOST – VSW) < 8.5V 17 mA BOOST Switch Drive IBOOST/ISW , ISW = 4A 22 mA/A Precondition Current Sense Voltage VSENSE – VBAT , VBAT = 5.0V 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 = 7.5V, 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 36518284fa For more information www.linear.com/LT3651-8.2 3 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Typical Application Related Parts