s-8204a Seiko Instruments Inc., s-8204a Datasheet - Page 15

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

Rev.1.3
5. Discharge Overcurrent Status
6. Charge Overcurrent Status
7. 0 V Battery Charge Function
In the S-8204A Series, in batteries in the normal status, the discharging current increases more than a
certain value. As a result, if the status in which the VINI pin voltage increases to the level of V
more, the DOP pin gets the V
is turned off and it stops discharging.
This IC has three levels for discharge overcurrent detection (V
discharge overcurrent, the COP pin is set in high impedance. The VMP pin is pulled up to the V
a resistor between VMP and VDD pin (R
The S-8204A Series’ actions against discharge overcurrent detection voltage 2 (V
detection voltage (V
The status of discharge overcurrent is released if the following condition is satisfied.
In the S-8204A Series, in batteries in the normal status, the charge current increases more than a certain
value. As a result, if the status in which the VINI pin voltage decreases to the level of V
COP pin is set in high impedance. This is the charge overcurrent status. The charge control FET is turned
off and it stops discharging.
In this charge overcurrent status, the VMP pin is pulled-up to the V
overdischarge status, the function of charge overcurrent detection works.
The status of charge overcurrent is released if the following condition is satisfied.
In this IC, regarding how to charge a discharged battery (0 V battery), users are able to select either
function of the two mentioned below.
Caution When the VDD pin voltage is less than the minimum value of operation voltage between
(1) The VMP pin voltage gets V
(1) The VMP pin voltage gets V
(1) Allow to charge a 0 V battery (enable to charge a 0 V battery)
(2) Inhibit charging a 0 V battery (unable to charge a 0 V battery)
_00
A 0 V battery is not charged;
when the voltage of a charger is battery voltage for inhibit charging 0 V battery (V
A 0 V battery is charged;
when the voltage of a charger is charger voltage for start charging 0 V battery (V
VDD and VSS pin (V
BATTERY PROTECTION IC FOR 3-SERIES OR 4-SERIES CELL PACK
SHORT
) are as well in V
DD
DSOP
level. This is the discharge overcurrent status. The discharge control FET
DS
DS
), this IC’s action is not assured.
−1.2 V (Typ.) or more.
or less.
Seiko Instruments Inc.
VMD
DIOV1
).
.
DIOV1
, V
DD
DIOV2
level by R
, V
SHORT
VMD
). In the status of
DIOV2
. Also in the
S-8204A Series
) and short circuit
CIOV
0CHA
0INH
or less, the
) or more.
) or less.
DIOV1
DD
level by
or
15