28V Linear Li+ Battery Chargers with Battery

Detection and Overvoltage Protected Output

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3

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Prequalification Charge Current

Percentage of the fast-

= 2.2V

5

10

15

%

CHG, POK Output Low Threshold

0.4

V

1

CHG, POK Output High Leakage Current

0.01

µA

40

POK Threshold

30

mV

DETBAT, SAFEOUT

DETBAT Logic-Input Low Threshold

0.4

DETBAT Logic-Input High Threshold

1.3

V

DETBAT Pullup Resistor

470

k

Ω

Minimum SAFEOUT Bypass Capacitance

1

µF

SAFEOUT Regulated Output

+85°C

4.5

4.7

4.9

V

SAFEOUT Current Limit

100

mA

EN, ABI, ABO, ABO

EN, ABI Internal Pulldown Resistor

100

200

400

k

Ω

EN Logic-Input Low Threshold

4.25V

0.4

V

EN Logic-Input High Threshold

4.25V

1.3

V

ABI Logic-Input Low Threshold

0.4

V

ABI Logic-Input High Threshold

1.3

V

ABO Output Low Threshold (MAX8845Y)

0.4

V

ABO Output High Threshold (MAX8845Y)

Open drain, 100k

Ω pullup to BATT

0.4V

V

ABO Output Low Threshold

(MAX8845Z)

0.4

V

ABO Output High Threshold (MAX8845Z)

0.4V

V

THERMAL

Die Temperature Regulation Threshold

115

°C

ELECTRICAL CHARACTERISTICS (continued)

design and characterization.