s-8204bad-tct1g Seiko Instruments Inc., s-8204bad-tct1g Datasheet - Page 14

• Manufacturer Part Number: s-8204bad-tct1g
• Description: Battery Protection Ic For 3-series Or 4-series Cell Pack
• Manufacturer: Seiko Instruments Inc.

14
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
S-8204B Series
1. Normal Status
2. Overcharge Status
3. Overdischarge Status
4. Power-down Status
Remark Refer to “
Operation
In the S-8204B Series, both of COP and DOP pins get the V
range of overdischarge detection voltage (V
current, the VINI pin’s voltage is discharge overcurrent detection voltage (V
In addition, the charge/discharge FETs are on.
In the S-8204B Series, any voltage of the batteries increases to the level of V
impedance. This is the overcharge status. The COP pin is pulled down to EB− by an external resistor so that the
charge FET is turned off and it stops charging.
This overcharge status is released if either condition 1 or 2 is satisfied;
In the S-8204B Series, when any voltage of the batteries decreases to the level of V
gets the V
This overcharge status is released/maintained if either condition 1 to 3 is satisfied;
In the S-8204B Series, when it reaches the overdischarge status, the VMP pin is pulled down to the V
resistor between VMP and VSS pin (R
every circuit in the S-8204B stops working so that the current consumption decreases to the level of current
consumption at power down (I
impedance.
The power-down status is released if the following condition is satisfied.
(1) The VMP pin voltage gets V
(1) In case that the VMP pin voltage is 39/40 × V
(2) In case that the VMP pin voltage is 39/40 × V
(1) To release; the VMP pin voltage is in the V
(2) To release; the VMP pin voltage is V
(3) The VMP pin voltage is V
overcharge release voltage (V
less.
more.
voltages of the batteries are in the level of overdischarge release voltage (V
SS
level. This is the overdischarge status. The discharge FET is turned off and it stops discharging.
Connection Examples of Battery Protection IC (cascade connection)”.
PDN
DS
) or less. This is the power-down status. In the status, the COP pin is set in high
/2 or less, the S-8204B Series maintains the power-down status.
DS
CLn
/2 or more.
VMS
) or less.
). If the VMP pin voltage decreases to the level of V
Seiko Instruments Inc.
DLn
DS
/2 or more and the VMP pin voltage is in the V
) to overcharge detection voltage (V
DD
DS
DS
level or more, all voltages of the batteries are in the V
or less; all voltages of the batteries are in the level of V
or more; all voltages of the batteries are in the level of
DD
level; when all values of battery voltage are in the
DIOV1
CUn
) or less. This is the normal status.
or more, the COP pin is set in high
CUn
DUn
), and due to the discharge
DLn
) or more.
or less, the DOP pin voltage
DD
DS
/2 or less, almost
level or less, all
SS
Rev.1.3
level by a
DLn
CUn
level or
_00
or