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楼主 |
发表于 2010-1-23 23:15:05
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CELL TEST is performed once every 31s during FAST-
CHARGE to determine if charging is complete. During
CELL TEST, the CS output is held high to prevent
charging. The cell’s voltage is measured and com-
pared against prior readings. The maximum cell volt-
age measurement during the charge is retained. If a
cell’s voltage falls more than 2mV (V-ΔV) from its peak
reading, the FAST-CHARGE terminates successfully
and moves to TOP-OFF. The DS2710 also moves to
TOP-OFF if the cell’s voltage reading does not exceed
the maximum over a 16min period (tFLAT). A hold-off
period for -ΔV and flat voltage detection begins at the
start of fast charging and prevents false termination in
the first 4min of the charge cycle (tTHO).
美信是停掉充电电流才检测的。 |
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