Datasheet LTC4002 (Analog Devices) - 3

LTC4002
ELECTRICAL CHARACTERISTICS (LTC4002-4.2) The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 10V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
INTC NTC Pin Output Current VNTC = 0.85V ● 75 85 95 µA VNTC-HOT NTC Pin Threshold Voltage (Hot) VNTC Falling ● 340 355 370 mV Hysteresis 25 mV VNTC-COLD NTC Pin Threshold Voltage (Cold) VNTC Rising ● 2.428 2.465 2.502 V Hysteresis 170 mV ∆VRECHRG Recharge Battery Voltage Offset from Full VBAT(FULLCHARGED) – VRECHRG, VBAT Falling 100 150 200 mV Charged Battery Voltage ILEAK CHRG Pin Leakage Current VCHRG = 8V, Charging Stops 1 µA
Oscillator
fOSC Switching Frequency 450 500 550 kHz DC Maximum Duty Cycle 100 %
Gate Drive
tr Rise Time CGATE = 2000pF, 10% to 90% 20 ns tf Fall Time CGATE = 2000pF, 90% to 10% 50 ns ∆VGATE Output Clamp Voltage VCC – VGATE, VCC ≥ 9V ● 8 V ∆VGATEHI Output High Voltage ∆VGATEHI = VCC – VGATE, VCC ≥ 7V ● 0.3 V ∆VGATELO Output Low Voltage ∆VGATELO = VCC – VGATE, VCC ≥ 7V ● 4.5 V
(LTC4002-8.4) The
●
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. VCC = 12V unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS DC Characteristics
VCC VCC Supply Voltage ● 8.9 22 V ICC VCC Supply Current Current Mode 3 5 mA Shutdown Mode 3 5 mA Sleep Mode 10 20 µA VBAT(FLT) Battery Regulated Float Voltage 9V ≤ VCC ≤ 22V (Note 2) 8.336 8.4 8.464 V ● 8.316 8.484 V VSNS(CHG) Constant Current Sense Voltage 95 100 105 mV 6V ≤ VBAT ≤ 8V (Note 3) ● 93 100 107 mV VSNS(TRKL) Trickle Current Sense Voltage VBAT = 0V (Note 3) 5 10 15 mV VTRKL Trickle Charge Threshold Voltage VBAT Rising 4.7 5 5.3 V VUV VCC Undervoltage Lockout Threshold Voltage VCC Rising 7.5 8.5 V ∆VUV VCC Undervoltage Lockout Hysteresis Voltage 500 mV VMSD Manual Shutdown Threshold Voltage COMP Pin Falling 200 350 500 mV VASD Automatic Shutdown Threshold Voltage VCC – VBAT 250 mV ICOMP COMP Pin Output Current VCOMP = 1.2V 100 µA ICHRG CHRG Pin Weak Pull-Down Current VCHRG = 1V 15 25 35 µA VCHRG CHRG Pin Output Low Voltage ICHRG = 1mA 0.15 0.3 V REOC End-of-Charge Ratio VSNS(EOC)/VSNS(CHG) 5 10 15 % tTIMER Charge Time Accuracy 10 % INTC NTC Pin Output Current VNTC = 0.85V ● 75 85 95 µA 4002f 3