Datasheet LT3650-4.1, LT3650-4.2 (Analog Devices) - 3

LT3650-4.1/LT3650-4.2
e lecTrical characTerisTics The
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denotes the specifications which apply over the full operating temperature range, otherwise specifications are at VIN = 20V, BOOST-SW = 4V, SHDN = 2V, SENSE = BAT = VBAT(FLT), CTIMER = 0.68µF. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS LT3650
VIN VIN Operating Range (Note 3) l 4.75 32 V VIN Start Voltage l 7.5 V VIN(OVLO) OVLO Threshold VIN Rising l 32 35 40 V OVLO Hysteresis 1 V VIN(UVLO) UVLO Threshold VIN Rising l 4.6 4.75 V UVLO Hysteresis 0.2 V VBAT(FLT) Battery Float Voltage LT3650-4.1 4.08 4.1 4.12 V l 4.06 4.14 V LT3650-4.2 4.18 4.2 4.22 V l 4.16 4.24 V ∆VRECHRG Recharge Battery Threshold Threshold Voltage Relative to VBAT(FLT) –100 mV VBAT(PRE) Battery Precondition Threshold Voltage VBAT Rising 2.9 V VBAT(PREHYST) Battery Precondition Threshold 90 mV Hysteresis IVIN Operating Input Supply Current CC/CV Mode, ISW = 0 l 2.5 3.5 mA Standby Mode 85 µA Shutdown (SHDN = 0) 15 µA IBOOST BOOST Supply Current Switch-On, ISW = 0 2.5V < V(BOOST – SW) < 4.5V 20 mA IBOOST/ISW BOOST Switch Drive ISW = 2A 30 mA/A VSW(ON) Switch-On Voltage Drop VIN – VSW, ISW = 2A 350 mV ISW(MAX) Switch Current Limit l 2.5 A VSENSE(PRE) Precondition Current Sense Voltage VSENSE – VBAT 15 mV VBAT = 2.5 VCLP(DC) CLP Threshold Voltage VCLP – VIN; VSENSE – VBAT = 50mV l 37.5 50 62.5 mV ICLP CLP Input Bias Current 200 nA VSENSE(DC) Maximum Current Sense Voltage VSENSE – VBAT; VBAT = 3.5V, VRNG/SS = 1.2V l 95 100 105 mV VSENSE(C/10) C/10 Trigger Sense Voltage l 7.5 10 12.5 mV IBAT BAT Input Bias Current Charging Terminated l 0.1 1 µA ISENSE SENSE Input Bias Current Charging Terminated l 0.1 1 µA IREVERSE Charger Reverse Current: VIN = 0V; BAT = SENSE = SW = VBAT(FLT) 1 µA IBAT + ISENSE + ISW VNTC(H) NTC Range Limit (High) VNTC Rising l 1.25 1.36 1.45 V VNTC(L) NTC Range Limit (Low) VNTC Falling l 0.27 0.29 0.315 V VNTC(HYST) NTC Threshold Hysteresis % of Threshold 20 % RNTC(DIS) NTC Disable Impedance Minimum External Impedance to GND l 250 500 kΩ INTC NTC Bias Current VNTC = 0.8V l 47.5 50 52.5 µA IRNG/SS IRNG/SS Bias Current l 45 50 55 µA VRNG/SS/VSENSE Current Limit Programming: VRNG/SS = 0.5 l 8.5 10 11.5 V/V VRNG/SS/VSENSE(MAX) VSHDN Shutdown Threshold Rising l 1.17 1.20 1.23 V VSHDN(HYST) Shutdown Hysteresis 120 mV ISHDN SHDN Input Bias Current –10 nA 36504142fc 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 Package Description Revision History Typical Application Related Parts