Single-Cell NiMH Charger

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3

Note 2: Specification does not include CS and STATUS pin currents.

Note 3: STATUS pin is active high.

Note 4: Specification is guaranteed by design.

Note 6: 50mV overdrive while connected to a pMOS transistor (such as ZXM62P02 from Zetex).

Note 9: Maximum allowable leakage on TMR to maintain SUSPEND state.

DC ELECTRICAL CHARACTERISTICS (continued)

(4.0V

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Cold Temperature Detect

Threshold

(Notes 1, 5, 8)

0.73

Hot Temperature No-Start

Threshold

(Notes 1, 5, 8)

0.30

0.33

0.36

Hot Temperature Safety

Shutdown Threshold

0.29

SUSPEND Current Threshold

(Note 9)

0.1

0.5

μA

Presence-Test Current, VP1

4.0V

1.0

10

15

μA

Reverse-Leakage Current, VP1

2

μA

Impedance-Voltage Test Range

32

400

mV

ELECTRICAL CHARACTERISTICS: TIMING

(4.0V

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Internal Time-Base Period

0.96

Seconds

Internal Time-Base Accuracy

-10

+10

%

DF1

FAST-CHARGE

96.9

DF2

PRECHARGE/TOP-OFF

25.0

CS Output Duty Factor

DF3

MAINTENANCE

1.56

%

CELL TEST Interval

31

Seconds

PRECHARGE Timeout

34

Minutes

FAST-CHARGE Termination

Hold-Off Period

4

Minutes

FAST-CHARGE Flat Voltage

Timeout

16

Minutes

Charge-Timer Period

1.0

Hours

Charge-Timer Accuracy

-6

+6

%

Charge-Timer Range

0.5

5.0

Hours

Toggle Rate, Charging

1

Hz

Toggle Rate, FAULT State

4

Hz