Unless otherwise noted, V

mal type apply for T

T

Symbol

Parameter

Conditions

Typical

Limit

Units

Min

Max

BATTERY CHARGER — Li ION MODE (MODE = LOW)

V

BAT-RST

Restart Threshold Voltage

(For 4.1V Cell)

V

EOC, to Pre-Qualification State

3.9

3.77

4.02

V

Restart Threshold Voltage

(For 4.2V Cell)

V

EOC, to Pre-Qualification State

4.00

3.86

4.12

R

SENSE

Internal Current Sense

Resistance

(Note 7)

120

m

Ω

Internal Current Sense Resistor

Load Current

(Note 7)

1.2

A

ICHG

MON

Diff-Amp Output

I

0.583

V

I

1.333

I

2.090

t

EOC

Time to EOC State

0˚C to +85˚C (Note 7)

5.625

4.78

6.42

Hrs

−40˚C to +85˚C (Note 7)

5.625

4.5

6.75

BATTERY CHARGER — NI-MH MODE (MODE = HIGH, LP3945 ONLY)

V

BATT-MAX

Battery Over Voltage Protection

(Charging Current Decreases to

0 mA when V

Voltage), V

5.4

5.292

5.508

V

LDO MODE (BIPB=HIGH)

V

OUT

Output Voltage Regulation

I

4.10

V

I

4.06

LOGIC LEVELS

V

IL

Low Level Input Voltage

EN

0.4

V

V

IH

High Level Input Voltage

EN

2.0

V

I

IL

Enable Pin Input Current

EN = LOW

−10

+10

µA

EN = HIGH

−5

+5

Electrical Characteristics, I

Unless otherwise noted, V

Limits appearing in boldface type apply over the entire junction temperature range for operation, T

6, 7, 8)

Symbol

Parameter

Conditions

Typical

Limit

Units

Min

Max

V

IL

Low Level Input Voltage

SDA & SCL

0.4

0.3 V

DD

V

V

IH

High Level Input Voltage

SDA & SCL

0.7 V

DD

V

V

V

OL

Low Level Output Voltage

SDA & SCL

0

0.2 V

DD

V

V

HYS

Schmitt Trigger Input Hysteresis

SDA & SCL

0.1 V

DD

V

F

CLK

Clock Frequency

400

kHz

t

HOLD

Hold Time Repeated START

Condition

(Note 7)

0.6

µs

t

CLK-LP

CLK Low Period

(Note 7)

1.3

µs

t

CLK-HP

CLK High Period

(Note 7)

0.6

µs

t

SU

Set-up Time Repeated START

Condition

(Note 7)

0.6

µs

t

DATA-HOLD

Data Hold Time

(Note 7)

300

ns

t

DATA-SU

Data Set-up Time

(Note 7)

100

ns

t

SU

Set-up Time for STOP Condition

(Note 7)

0.6

µs

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