DS2711/DS2712: Loose Cell NiMH Charger

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PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Duty Factor, Parallel

Precharge/Top-Off

CC1, CC2

0.125

Duty Factor, Maintenance

Charge

CC1, CC2

0.0156

Cell Test Interval

31

s

Precharge Time-Out

34

minutes

Fast-Charge Termination

Hold-Off Period

4

minutes

Fast-Charge Flat Voltage

Time-Out

16

minutes

Charge Timer Period

2.5

h

Charge Timer Accuracy

-5

+5

%

Charge Timer Range

0.5

10

h

Note 1:

Note 2:

Note 3:

When operating in two-cell-series charge configuration, the DMSEL pin must have less than 50pF of external load capacitance

for proper operation. If the load capacitance is greater than 50pF, a resistor voltage divider should be used to maintain DMSEL

Note 4:

Note 5:

Note 6:

Note 7:

Note 8: