S-8249AAP-M6T1U Datasheet, PDF (12/22 Pages) Seiko Instruments Inc – VOLTAGE MONITORING IC WITH CELL BALANCING FUNCTION

VOLTAGE MONITORING IC WITH CELL BALANCING FUNCTION
S-8249 Series
Rev.1.2_00
3. Overcharge status
In the S-8249 Series, if V_DS is the overcharge detection voltage (V_CU) or higher and this status continues for the
overcharge detection delay time (t_CU) or longer, the CO pin output is inverted. The CO pin output status varies
according to the output form and output logic selected, as shown in Table 11. This is the overcharge status. In
the overcharge status, the CB pin output becomes "L".
Table 11
CO Pin Output Form and Output Logic CB Pin Output
CMOS output, active "H"
"L"
CMOS output, active "L"
"L"
Nch open-drain output, active "H"
"L"
Nch open-drain output, active "L"
"L"
CO Pin Output
"H"
"L"
"H"
"L"
The overcharge status is released when V_DS drops to the overcharge release voltage (V_CL) or lower and this
status continues for the overcharge release delay time (t_CL) or longer.
_____
4. CE pin
_____
The S-8249 Series has the CE pin (Power-saving mode switc_{__}h_{__}i_{_}ng pin). The S-8249 Series is set to
power-saving
mode
by
inputting
a
voltage
of
V^_____
CEH
or
higher
to
the
CE
pin.
_____
CE Pin
Open
(V^_____
CE
=
V_SS)
"H" (V ≥ V ) ^_____
CE
_____
CEH
"L" (V ≤ V ) ^_____
CE
_____
CEL
Table 12
Status
Normal operation mode
Power-saving mode
Normal operation mode
In power-saving mode, the current consumption is decreased to current consumption during power-saving (I_PSV).
The CB pin or the CO pin output in power-saving mode is the same as that in the normal status.
_____
The_{__}C_{__}E_{_} pin is pulled down to V_SS by the internal resistor. When in a mode other than power-saving mode, leave
the CE pin open or short it with V_SS.
12