LT3651 Просмотр технического описания (PDF) - Linear Technology

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LT3651

Monolithic 4A Wide Input 1 Cell Li-Ion Battery Charger

Linear Technology 

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.

PARAMETER

CONDITIONS

MIN TYP MAX

UNITS

TIMER Charge/Discharge Current

25

µA

TIMER Disable Threshold

l 0.1

0.25

V

Full Charge Cycle Time-Out

3

Hour

Precondition Timeout

22.5

Minute

Timer Accuracy

l –13

13

%

Switcher Operating Frequency, fO

Minimum SW On-Time, tON(MIN)

RT = 50kΩ

RT = 250kΩ

1.1

MHz

250

kHz

150

ns

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3651 is tested under pulse loaded conditions such that

TJ = TA. The LT3651E is guaranteed to meet performance specifications

from 0°C to 85°C junction temperature. Specifications over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LT3651I is guaranteed over the full –40°C to 125°C operating junction

temperature range. The junction temperature (TJ in °C) is calculated from

the ambient temperature (TA in °C) and power dissipation (PD in Watts)

according to the formula:

TJ = TA + PD • θJA

where θJA (in °C/W) is the package thermal impedance.

Note 3: This IC includes overtemperature protection that is intended to

protect the device during momentary overload conditions. The maximum

rated junction temperature will be exceeded when this protection is active.

Continuous operation above the specified absolute maximum operating

junction temperature may impair device reliability or permanently damage

the device.

365142ff

4

For more information www.linear.com/LT3651-4.1

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