Datasheet LTC4002 (Analog Devices) - 4

LTC4002
ELECTRICAL CHARACTERISTICS (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
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 200 300 400 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 ● 8 V ∆VGATEHI Output High Voltage ∆VGATEHI = VCC – VGATE ● 0.3 V ∆VGATELO Output Low Voltage ∆VGATELO = VCC – VGATE ● 4.5 V
Note 1:
Absolute Maximum Rating are those values beyond which the life
Note 4:
The LTC4002 is guaranteed to meet performance specifications of a device may be impaired. from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
Note 2:
The LTC4002 is tested with Test Circuit 1. temperature range are assured by design, characterization and correlation
Note 3:
The LTC4002 is tested with Test Circuit 2. with statistical process controls.
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25
°
C, VCC = 10V unless otherwise noted. Oscillator Frequency Supply Current vs Temperature Supply Current vs VCC vs Temperature
4.0 4 550 CURRENT MODE 3.5 (mA) (mA) 3 (kHz) 500 I CC I CC f OSC 3.0 2.5 2 450 –50 –25 0 25 50 75 100 125 5 10 15 20 25 – 50 – 25 0 25 50 75 100 125 TEMPERATURE (°C) VCC (V) TEMPERATURE (°C) 4002 G01 4002 G02 4002 G03 4002f 4