s-8204a Seiko Instruments Inc., s-8204a Datasheet - Page 14

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