LTC4069(RevB) Просмотр технического описания (PDF) - Linear Technology

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LTC4069
(Rev.:RevB)

Standalone 750mA Li-Ion Battery Charger in 2 × 2 DFN with NTC Thermistor Input

Linear Technology 

LTC4069

ELECTRICAL CHARACTERISTICS

The l denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

VCC = 5V, VBAT = 3.8V, VNTC = 0V unless otherwise specified. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IPROG

VMS, PROG

tSS

ITRKL

VTRKL

VTRHYS

ΔVRECHRG

ΔVUVCL1

ΔVUVCL2

tTIMER

VCHRG

ICHRG

IC/10

TLIM

PROG Pin Pull-Up Current

PROG Shutdown Threshold Voltage

Soft-Start Time

Trickle Charge Current

Trickle Charge Threshold Voltage

Trickle Charge Hysteresis Voltage

Recharge Battery Threshold Voltage

(VCC – VBAT) Undervoltage Current

Limit

Termination Timer

Recharge Timer

Low-Battery Trickle Charge Time

CHRG Pin Output Low Voltage

CHRG Pin Leakage Current

End of Charge Indication Current Level

Junction Temperature in Constant

Temperature Mode

VPROG > 1V

VPROG Rising

l 3.7

VBAT = 2V, RPROG = 2k (0.1%)

VBAT Rising

35

l 2.7

VFLOAT – VRECHRG, 0°C < TA < 85°C

IBAT = 90% Programmed Charge Current

IBAT = 10% Programmed Charge Current

VBAT = 2.5V

ICHRG = 5mA

VBAT = 4.5V, VCHRG = 5V

RPROG = 2k (Note 5)

70

180

90

l3

l 1.5

l 0.75

l

l

l 0.08

3

4

170

50

2.9

90

100

220

125

4.5

2.25

1.125

60

0

0.095

115

μA

4.3

V

μs

65

mA

3.05

V

mV

130

mV

330

mV

150

mV

6

Hrs

3

Hrs

1.5

Hrs

105

mV

1

μA

0.11 mA/mA

°C

RON

fBADBAT

DBADBAT

Power FET “ON” Resistance

(Between VCC and BAT)

Defective Battery Detection CHRG

Pulse Frequency

Defective Battery Detection CHRG

Pulse Frequency Duty Ratio

IBAT = 350mA

450

mΩ

2

Hz

75

%

INTC

VCOLD

VHOT

VNTC-DIS

VDIS-HYS

fNTC

DNTC

NTC Pin Current

Cold Temperature Fault Threshold

Voltage

Hot Temperature Fault Threshold

Voltage

NTC Disable Threshold Voltage

NTC Disable Hysteresis Voltage

Fault Temperature CHRG Pulse Frequency

Fault Temperature CHRG Pulse Frequency

Duty Ratio

VNTC = 2.5V

Rising Voltage Threshold

Hysteresis

Falling Voltage Threshold

Hysteresis

Falling Threshold; VCC = 5V

1

μA

0.76 • VCC

V

0.015 • VCC

V

0.35 • VCC

V

0.017 • VCC

V

82

mV

50

mV

2

Hz

25

%

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 LTC4069 is guaranteed to meet performance specifications

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

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3: Failure to solder the exposed backside of the package to the PC

board ground plane will result in a thermal resistance much higher than

rated.

Note 4: Although the LTC4069 functions properly at 3.75V, full charge

current requires an input voltage greater than the desired final battery

voltage per the ΔVUVCL1 specification.

Note 5: IC/10 is expressed as a fraction of measured full charge current

with indicated PROG resistor.

Note 6: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed 125°C when overtemperature protection is active.

Continuous operation above the specified maximum operating junction

temperature may impair device reliability.

4069fb

3

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