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LTC4002

4002f

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

Hysteresis

VNTC-COLD NTC Pin Threshold Voltage (Cold)

VNTC Rising

●

2.428

2.465

2.502

Hysteresis

170

∆VRECHRG Recharge Battery Voltage Offset from Full

VBAT(FULLCHARGED) – VRECHRG, VBAT Falling

200

300

400

Charged Battery Voltage

ILEAK

CHRG Pin Leakage Current

VCHRG = 8V, Charging Stops

µA

Oscillator

fOSC

Switching Frequency

450

500

550

kHz

Maximum Duty Cycle

100

Gate Drive

Rise Time

CGATE = 2000pF, 10% to 90%

Fall Time

CGATE = 2000pF, 90% to 10%

∆VGATE

Output Clamp Voltage

VCC – VGATE

●

∆VGATEHI

Output High Voltage

∆VGATEHI = VCC – VGATE

●

0.3

∆VGATELO

Output Low Voltage

∆VGATELO = VCC – VGATE

●

4.5

TYPICAL PERFOR A CE CHARACTERISTICS

Supply Current vs Temperature

Supply Current vs VCC

Oscillator Frequency

vs Temperature

TEMPERATURE (°C)

–50

3.5

4.0

4002

G01

3.0

–25

100

125

2.5

VCC (V)

4002 G02

CURRENT MODE

TEMPERATURE (°C)

–50

4002 G03

500

–25

450

550

100

125

TA = 25°C, VCC = 10V unless otherwise noted.

Note 1: Absolute Maximum Rating are those values beyond which the life

of a device may be impaired.

Note 2: The LTC4002 is tested with Test Circuit 1.

Note 3: The LTC4002 is tested with Test Circuit 2.

Note 4: The LTC4002 is guaranteed to meet performance specifications

from 0°C to 70°C. Specifications over the – 40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

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