LT3651-4.1/LT3651-4.2
Monolithic 4A Wide Input
1 Cell Li-Ion Battery Charger
FEATURES DESCRIPTION Wide Input Voltage Range: Up to 32V (40V Absolute Maximum)
n Programmable Charge Current Up to 4A
n Selectable C/10 or Onboard Timer Terminatio Dynamic Charge Rate Programming/Soft-Start
n Programmable Input Current Limit
n 0.5% Float Voltage Accuracy
n 7.5% Charge Current Accuracy
n 4% C/10 Detection Accuracy
n NTC Resistor Temperature Monitor
n Auto-Recharge at 97.5% Float Voltage
n Auto-Precondition 1.1V l 88 95 103 mV l 4.5 8.6 12.3 mV 0.1 1 µA 0.1 1 µA 50 56 µA C/10 Trigger Sense Voltage VSENSE – VBAT BAT Input Bias Current Charging Terminated SENSE Input Bias Current Charging Terminated RNG/SS Bias Current 11.5 l 44 V/V 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 NTC Threshold Hysteresis % of Threshold 10 NTC Disable Impedance Minimum External Impedance to GND l 150 470 NTC Bias Current VNTC = 0.75V l 46.5 50 53.5 Shutdown Threshold VSHDN Rising l 1.15 1.20 1.23 Shutdown Hysteresis
Status Low Voltage kΩ 95 SHDN Input Bias Current
l µA
V
mV –10
VCHRG, VFAULT , VACPR, Load = 10mA V
% nA
0.45 V 365142ff For more information www.linear.com/LT3651-4.1 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. …